test: make unsafe test coercion explicit

Move test coercion out of a hidden global and require each test to import the helper so review tools and runtime scripts can see the unsafe boundary.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/__tests__/perf/plugin-init-team-mode-resume-defer.test.ts

@@ -4,6 +4,7 @@ import { join } from "node:path"
 
 import type { PluginInput } from "@opencode-ai/plugin"
 import { describe, expect, it } from "bun:test"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const HUNG_LEAD_SESSION_ID = "ses_999999999fffeeRegrTestHang0"
 
@@ -16,7 +17,7 @@ function makeHangingClient(): {
     hangCount.value += 1
     return new Promise<never>(() => {})
   }
-  const client = testCoerce<PluginInput["client"]>({
+  const client = unsafeTestValue<PluginInput["client"]>({
     session: {
       get: sessionGet,
     },

src/cli/config-manager/npm-dist-tags.test.ts

@@ -3,6 +3,7 @@
 import { afterEach, describe, expect, mock, test } from "bun:test"
 
 import { fetchNpmDistTags } from "../config-manager"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("fetchNpmDistTags", () => {
   const originalFetch = globalThis.fetch
@@ -13,7 +14,7 @@ describe("fetchNpmDistTags", () => {
 
   test("returns dist-tags on success", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: true,
         json: () => Promise.resolve({ latest: "3.13.1", beta: "3.14.0-beta.1" }),
@@ -29,7 +30,7 @@ describe("fetchNpmDistTags", () => {
 
   test("returns null on network failure", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() => Promise.reject(new Error("Network error"))))
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() => Promise.reject(new Error("Network error"))))
 
     //#when
     const result = await fetchNpmDistTags("oh-my-openagent")
@@ -40,7 +41,7 @@ describe("fetchNpmDistTags", () => {
 
   test("returns null on non-ok response", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: false,
         status: 404,

src/cli/config-manager/opencode-binary.test.ts

@@ -4,6 +4,7 @@ import { afterEach, beforeEach, describe, expect, it, spyOn } from "bun:test"
 
 import * as configContext from "./config-context"
 import * as spawnHelpers from "../../shared/spawn-with-windows-hide"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type OpenCodeBinaryModule = typeof import("./opencode-binary")
 
@@ -92,11 +93,11 @@ describe("getOpenCodeVersion (installer)", () => {
         }),
       )
 
-      const immediateSetTimeout = testCoerce<typeof globalThis.setTimeout>(((handler: TimerHandler) => {
+      const immediateSetTimeout = unsafeTestValue<typeof globalThis.setTimeout>(((handler: TimerHandler) => {
         if (typeof handler === "function") {
           handler()
         }
-        return testCoerce<ReturnType<typeof setTimeout>>(1)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(1)
       }))
       const setTimeoutSpy = spyOn(globalThis, "setTimeout").mockImplementation(immediateSetTimeout)
 
@@ -124,11 +125,11 @@ describe("getOpenCodeVersion (installer)", () => {
         }),
       )
 
-      const immediateSetTimeout = testCoerce<typeof globalThis.setTimeout>(((handler: TimerHandler) => {
+      const immediateSetTimeout = unsafeTestValue<typeof globalThis.setTimeout>(((handler: TimerHandler) => {
         if (typeof handler === "function") {
           handler()
         }
-        return testCoerce<ReturnType<typeof setTimeout>>(1)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(1)
       }))
       const setTimeoutSpy = spyOn(globalThis, "setTimeout").mockImplementation(immediateSetTimeout)
 

src/cli/config-manager/plugin-name-with-version.test.ts

@@ -3,6 +3,7 @@
 import { afterEach, describe, expect, mock, test } from "bun:test"
 
 import { getPluginNameWithVersion } from "../config-manager"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("getPluginNameWithVersion", () => {
   const originalFetch = globalThis.fetch
@@ -13,7 +14,7 @@ describe("getPluginNameWithVersion", () => {
 
   test("returns the canonical latest tag when current version matches latest", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: true,
         json: () => Promise.resolve({ latest: "3.13.1", beta: "3.14.0-beta.1" }),
@@ -29,7 +30,7 @@ describe("getPluginNameWithVersion", () => {
 
   test("preserves the canonical prerelease channel when fetch fails", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() => Promise.reject(new Error("Network error"))))
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() => Promise.reject(new Error("Network error"))))
 
     //#when
     const result = await getPluginNameWithVersion("3.14.0-beta.1")
@@ -40,7 +41,7 @@ describe("getPluginNameWithVersion", () => {
 
   test("returns the canonical bare package name for stable fallback", async () => {
     //#given
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: false,
         status: 404,

src/cli/install.test.ts

@@ -5,6 +5,7 @@ import { join } from "node:path"
 import { install } from "./install"
 import * as configManager from "./config-manager"
 import type { InstallArgs } from "./types"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 // Mock console methods to capture output
 const mockConsoleLog = mock(() => {})
@@ -57,7 +58,7 @@ describe("install CLI - binary check behavior", () => {
     getOpenCodeVersionSpy = spyOn(configManager, "getOpenCodeVersion").mockResolvedValue(null)
 
     // given mock npm fetch
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: true,
         json: () => Promise.resolve({ latest: "3.0.0" }),
@@ -92,7 +93,7 @@ describe("install CLI - binary check behavior", () => {
     getOpenCodeVersionSpy = spyOn(configManager, "getOpenCodeVersion").mockResolvedValue(null)
 
     // given mock npm fetch
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: true,
         json: () => Promise.resolve({ latest: "3.0.0" }),
@@ -131,7 +132,7 @@ describe("install CLI - binary check behavior", () => {
     getOpenCodeVersionSpy = spyOn(configManager, "getOpenCodeVersion").mockResolvedValue("1.4.0")
 
     // given mock npm fetch
-    globalThis.fetch = testCoerce<typeof fetch>(mock(() =>
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mock(() =>
       Promise.resolve({
         ok: true,
         json: () => Promise.resolve({ latest: "3.0.0" }),

src/cli/run/completion-continuation.test.ts

@@ -5,6 +5,7 @@ import { tmpdir } from "node:os"
 import type { RunContext } from "./types"
 import { _resetForTesting, setSessionAgent } from "../../features/claude-code-session-state"
 import { writeState as writeRalphLoopState } from "../../hooks/ralph-loop/storage"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const testDirs: string[] = []
 
@@ -26,7 +27,7 @@ function createTempDir(): string {
 
 function createMockContext(directory: string): RunContext {
   return {
-    client: testCoerce<RunContext["client"]>({
+    client: unsafeTestValue<RunContext["client"]>({
       session: {
         todo: mock(() => Promise.resolve({ data: [] })),
         children: mock(() => Promise.resolve({ data: [] })),
@@ -155,13 +156,13 @@ describe("checkCompletionConditions continuation coverage", () => {
     const ctx = createMockContext(directory)
     ctx.sessionID = "child-session"
     setSessionAgent("child-session", "atlas")
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "child-session" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "child-session"
         ? [{ info: { agent: "atlas", providerID: "openai", modelID: "gpt-5.4" } }]
         : [],
@@ -187,13 +188,13 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "lineage-only-session"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "lineage-only-session" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async () => ({ data: [] })))
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async () => ({ data: [] })))
 
     const { checkCompletionConditions } = await import("./completion")
 
@@ -218,13 +219,13 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "mismatch-subagent-session"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "mismatch-subagent-session" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "mismatch-subagent-session"
         ? [{ info: { agent: "sisyphus-junior", providerID: "openai", modelID: "gpt-5.4" } }]
         : [],
@@ -253,13 +254,13 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "appended-mismatch-session"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "appended-mismatch-session" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "appended-mismatch-session"
         ? [{ info: { agent: "sisyphus-junior", providerID: "openai", modelID: "gpt-5.4" } }]
         : [],
@@ -288,10 +289,10 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_appended_descendant"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async () => {
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async () => {
       throw new Error("session lookup failed")
     }))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "ses_appended_descendant"
         ? [{ info: { agent: "atlas", providerID: "openai", modelID: "gpt-5.4" } }]
         : [],
@@ -317,7 +318,7 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_direct_child"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "ses_direct_child" ? "ses_parent" : undefined,
@@ -347,7 +348,7 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_direct_tracked"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: undefined,
@@ -374,7 +375,7 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_unknown_child"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async () => {
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async () => {
       throw new Error("lineage unavailable")
     }))
 
@@ -401,13 +402,13 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_direct_child"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "ses_direct_child" ? "ses_root_tracked" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "ses_direct_child"
         ? [{ info: { agent: "sisyphus-junior", providerID: "openai", modelID: "gpt-5.4" } }]
         : [],
@@ -437,13 +438,13 @@ describe("checkCompletionConditions continuation coverage", () => {
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_child_after_compaction"
     setSessionAgent("ses_child_after_compaction", "atlas")
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "ses_child_after_compaction" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "ses_child_after_compaction"
         ? [
             { info: { agent: "atlas", providerID: "openai", modelID: "gpt-5.4" } },
@@ -472,13 +473,13 @@ describe("checkCompletionConditions continuation coverage", () => {
 
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_sqlite_descendant"
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "ses_sqlite_descendant" ? "root-session" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: path.id === "ses_sqlite_descendant"
         ? [
             { id: "msg_0001", info: { agent: "atlas", providerID: "openai", modelID: "gpt-5.4", time: { created: 100 } } },
@@ -512,13 +513,13 @@ describe("checkCompletionConditions continuation coverage", () => {
     const ctx = createMockContext(directory)
     ctx.sessionID = "ses_appended_child"
     setSessionAgent("ses_appended_child", "atlas")
-    ctx.client.session.get = testCoerce<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
+    ctx.client.session.get = unsafeTestValue<RunContext["client"]["session"]["get"]>(mock(async ({ path }: { path: { id: string } }) => ({
       data: {
         id: path.id,
         parentID: path.id === "ses_appended_child" ? "ses_root_tracked" : undefined,
       },
     })))
-    ctx.client.session.messages = testCoerce<RunContext["client"]["session"]["messages"]>(mock(async () => ({ data: [] })))
+    ctx.client.session.messages = unsafeTestValue<RunContext["client"]["session"]["messages"]>(mock(async () => ({ data: [] })))
 
     const { checkCompletionConditions } = await import("./completion")
 

src/cli/run/completion-verbose-logging.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect, mock, spyOn } from "bun:test"
 import type { RunContext, ChildSession, SessionStatus } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const createMockContext = (overrides: {
   childrenBySession?: Record<string, ChildSession[]>
@@ -13,7 +14,7 @@ const createMockContext = (overrides: {
   } = overrides
 
   return {
-    client: testCoerce<RunContext["client"]>({
+    client: unsafeTestValue<RunContext["client"]>({
       session: {
         todo: mock(() => Promise.resolve({ data: [] })),
         children: mock((opts: { path: { id: string } }) =>

src/cli/run/completion.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect, mock, spyOn } from "bun:test"
 import type { RunContext, Todo, ChildSession, SessionStatus } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const createMockContext = (overrides: {
   todo?: Todo[]
@@ -13,7 +14,7 @@ const createMockContext = (overrides: {
   } = overrides
 
   return {
-    client: testCoerce<RunContext["client"]>({
+    client: unsafeTestValue<RunContext["client"]>({
       session: {
         todo: mock(() => Promise.resolve({ data: todo })),
         children: mock((opts: { path: { id: string } }) =>

src/cli/run/event-handlers.test.ts

@@ -2,6 +2,7 @@ const { describe, it, expect, spyOn } = require("bun:test")
 import type { RunContext } from "./types"
 import { createEventState } from "./events"
 import { handleSessionStatus, handleMessagePartUpdated, handleMessageUpdated, handleTuiToast } from "./event-handlers"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const createMockContext = (sessionID: string = "test-session"): RunContext => ({
   sessionID,
@@ -23,7 +24,7 @@ describe("handleSessionStatus", () => {
     }
 
     //#when - handleSessionStatus called with idle status
-    handleSessionStatus(ctx, testCoerce(payload), state)
+    handleSessionStatus(ctx, unsafeTestValue(payload), state)
 
     //#then - state.mainSessionIdle === true
     expect(state.mainSessionIdle).toBe(true)
@@ -44,7 +45,7 @@ describe("handleSessionStatus", () => {
     }
 
     //#when - handleSessionStatus called with busy status
-    handleSessionStatus(ctx, testCoerce(payload), state)
+    handleSessionStatus(ctx, unsafeTestValue(payload), state)
 
     //#then - state.mainSessionIdle === false
     expect(state.mainSessionIdle).toBe(false)
@@ -65,7 +66,7 @@ describe("handleSessionStatus", () => {
     }
 
     //#when - handleSessionStatus called with different session ID
-    handleSessionStatus(ctx, testCoerce(payload), state)
+    handleSessionStatus(ctx, unsafeTestValue(payload), state)
 
     //#then - state.mainSessionIdle remains unchanged
     expect(state.mainSessionIdle).toBe(true)
@@ -86,7 +87,7 @@ describe("handleSessionStatus", () => {
     }
 
     //#when - handleSessionStatus called with camelCase sessionId
-    handleSessionStatus(ctx, testCoerce(payload), state)
+    handleSessionStatus(ctx, unsafeTestValue(payload), state)
 
     //#then - state.mainSessionIdle === true
     expect(state.mainSessionIdle).toBe(true)
@@ -114,7 +115,7 @@ describe("handleMessagePartUpdated", () => {
     }
 
     //#when
-    handleMessagePartUpdated(ctx, testCoerce(payload), state)
+    handleMessagePartUpdated(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.hasReceivedMeaningfulWork).toBe(true)
@@ -142,7 +143,7 @@ describe("handleMessagePartUpdated", () => {
     }
 
     //#when
-    handleMessagePartUpdated(ctx, testCoerce(payload), state)
+    handleMessagePartUpdated(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.hasReceivedMeaningfulWork).toBe(false)
@@ -170,7 +171,7 @@ describe("handleMessagePartUpdated", () => {
     }
 
     //#when
-    handleMessagePartUpdated(ctx, testCoerce(payload), state)
+    handleMessagePartUpdated(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.currentTool).toBe("read")
@@ -200,7 +201,7 @@ describe("handleMessagePartUpdated", () => {
     }
 
     //#when
-    handleMessagePartUpdated(ctx, testCoerce(payload), state)
+    handleMessagePartUpdated(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.currentTool).toBeNull()
@@ -225,7 +226,7 @@ describe("handleMessagePartUpdated", () => {
     }
 
     //#when
-    handleMessagePartUpdated(ctx, testCoerce(payload), state)
+    handleMessagePartUpdated(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.hasReceivedMeaningfulWork).toBe(true)
@@ -243,7 +244,7 @@ describe("handleMessagePartUpdated", () => {
 
     handleMessageUpdated(
       ctx,
-      testCoerce({
+      unsafeTestValue({
         type: "message.updated",
         properties: {
           info: {
@@ -262,7 +263,7 @@ describe("handleMessagePartUpdated", () => {
     // when
     handleMessagePartUpdated(
       ctx,
-      testCoerce({
+      unsafeTestValue({
         type: "message.part.updated",
         properties: {
           part: {
@@ -280,7 +281,7 @@ describe("handleMessagePartUpdated", () => {
 
     handleMessagePartUpdated(
       ctx,
-      testCoerce({
+      unsafeTestValue({
         type: "message.part.updated",
         properties: {
           part: {
@@ -323,7 +324,7 @@ describe("handleTuiToast", () => {
     }
 
     //#when
-    handleTuiToast(ctx, testCoerce(payload), state)
+    handleTuiToast(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.mainSessionError).toBe(true)
@@ -344,7 +345,7 @@ describe("handleTuiToast", () => {
     }
 
     //#when
-    handleTuiToast(ctx, testCoerce(payload), state)
+    handleTuiToast(ctx, unsafeTestValue(payload), state)
 
     //#then
     expect(state.mainSessionError).toBe(false)

src/cli/run/integration.test.ts

@@ -7,6 +7,7 @@ import * as spawnWithWindowsHideModule from "../../shared/spawn-with-windows-hid
 import type { OpencodeClient } from "./types"
 import * as originalSdk from "@opencode-ai/sdk"
 import * as originalPortUtils from "../../shared/port-utils"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const mockServerClose = mock(() => {})
 const mockCreateOpencode = mock(() =>
@@ -56,7 +57,7 @@ function createMockWriteStream(): MockWriteStream {
 
 const createMockClient = (
   getResult?: { error?: unknown; data?: { id: string } }
-): OpencodeClient => (testCoerce<OpencodeClient>({
+): OpencodeClient => (unsafeTestValue<OpencodeClient>({
   session: {
     get: mock((opts: { path: { id: string } }) =>
       Promise.resolve(getResult ?? { data: { id: opts.path.id } })
@@ -78,8 +79,8 @@ describe("integration: --json mode", () => {
       summary: "Test summary",
     }
     const manager = createJsonOutputManager({
-      stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-      stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+      stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+      stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
     })
 
     // when
@@ -103,8 +104,8 @@ describe("integration: --json mode", () => {
     const mockStdout = createMockWriteStream()
     const mockStderr = createMockWriteStream()
     const manager = createJsonOutputManager({
-      stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-      stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+      stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+      stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
     })
     manager.redirectToStderr()
 
@@ -272,8 +273,8 @@ describe("integration: option combinations", () => {
       summary: "Test completed",
     }
     const jsonManager = createJsonOutputManager({
-      stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-      stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+      stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+      stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
     })
     jsonManager.redirectToStderr()
     spawnSpy.mockClear()

src/cli/run/json-output.test.ts

@@ -1,6 +1,7 @@
 import { describe, it, expect, beforeEach } from "bun:test"
 import type { RunResult } from "./types"
 import { createJsonOutputManager } from "./json-output"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 interface MockWriteStream {
   write: (chunk: string) => boolean
@@ -31,8 +32,8 @@ describe("createJsonOutputManager", () => {
     it("causes stdout writes to go to stderr", () => {
       // given
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
       manager.redirectToStderr()
 
@@ -49,8 +50,8 @@ describe("createJsonOutputManager", () => {
     it("reverses the redirect", () => {
       // given
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
       manager.redirectToStderr()
 
@@ -75,8 +76,8 @@ describe("createJsonOutputManager", () => {
         summary: "Test summary",
       }
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
 
       // when
@@ -98,8 +99,8 @@ describe("createJsonOutputManager", () => {
         summary: "Test summary",
       }
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
 
       // when
@@ -126,8 +127,8 @@ describe("createJsonOutputManager", () => {
         summary: "Test",
       }
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
       manager.redirectToStderr()
 
@@ -148,8 +149,8 @@ describe("createJsonOutputManager", () => {
     it("work correctly", () => {
       // given
       const manager = createJsonOutputManager({
-        stdout: testCoerce<NodeJS.WriteStream>(mockStdout),
-        stderr: testCoerce<NodeJS.WriteStream>(mockStderr),
+        stdout: unsafeTestValue<NodeJS.WriteStream>(mockStdout),
+        stderr: unsafeTestValue<NodeJS.WriteStream>(mockStderr),
       })
 
       // when

src/cli/run/poll-for-completion.test.ts

@@ -2,6 +2,7 @@ import { afterEach, beforeEach, describe, it, expect, mock, spyOn } from "bun:te
 import type { RunContext, Todo, ChildSession, SessionStatus } from "./types"
 import { createEventState } from "./events"
 import { pollForCompletion } from "./poll-for-completion"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const createMockContext = (overrides: {
   todo?: Todo[]
@@ -15,7 +16,7 @@ const createMockContext = (overrides: {
   } = overrides
 
   return {
-    client: testCoerce<RunContext["client"]>({
+    client: unsafeTestValue<RunContext["client"]>({
       session: {
         todo: mock(() => Promise.resolve({ data: todo })),
         children: mock((opts: { path: { id: string } }) =>
@@ -124,7 +125,7 @@ describe("pollForCompletion", () => {
     let todoCallCount = 0
     let busyInserted = false
 
-    ;(testCoerce(ctx.client.session)).todo = mock(async () => {
+    ;(unsafeTestValue(ctx.client.session)).todo = mock(async () => {
       todoCallCount++
       if (todoCallCount === 1 && !busyInserted) {
         busyInserted = true
@@ -133,10 +134,10 @@ describe("pollForCompletion", () => {
       }
       return { data: [] }
     })
-    ;(testCoerce(ctx.client.session)).children = mock(() =>
+    ;(unsafeTestValue(ctx.client.session)).children = mock(() =>
       Promise.resolve({ data: [] })
     )
-    ;(testCoerce(ctx.client.session)).status = mock(() =>
+    ;(unsafeTestValue(ctx.client.session)).status = mock(() =>
       Promise.resolve({ data: {} })
     )
 
@@ -322,17 +323,17 @@ describe("pollForCompletion", () => {
     const abortController = new AbortController()
     let pollTick = 0
 
-    ;(testCoerce(ctx.client.session)).todo = mock(async () => {
+    ;(unsafeTestValue(ctx.client.session)).todo = mock(async () => {
       pollTick++
       if (pollTick === 2) {
         eventState.currentTool = "task"
       }
       return { data: [] }
     })
-    ;(testCoerce(ctx.client.session)).children = mock(() =>
+    ;(unsafeTestValue(ctx.client.session)).children = mock(() =>
       Promise.resolve({ data: [] })
     )
-    ;(testCoerce(ctx.client.session)).status = mock(() =>
+    ;(unsafeTestValue(ctx.client.session)).status = mock(() =>
       Promise.resolve({ data: {} })
     )
 

src/cli/run/session-resolver.test.ts

@@ -1,4 +1,5 @@
 /// <reference types="bun-types" />
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 import { beforeEach, describe, expect, it, mock, spyOn } from "bun:test";
 import { resolveSession } from "./session-resolver";
@@ -10,7 +11,7 @@ const createMockClient = (overrides: {
 } = {}): OpencodeClient => {
   const { getResult, createResults = [] } = overrides
   let createCallIndex = 0
-  return testCoerce<OpencodeClient>({
+  return unsafeTestValue<OpencodeClient>({
     session: {
       get: mock((opts: { path: { id: string } }) =>
         Promise.resolve(getResult ?? { data: { id: opts.path.id } })

src/cli/run/timestamp-output.test.ts

@@ -2,6 +2,7 @@
 
 import { describe, expect, it } from "bun:test"
 import { createTimestampTransformer, createTimestampedStdoutController } from "./timestamp-output"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createLocalDate(hours: number, minutes: number, seconds: number): Date {
   return new Date(2026, 1, 19, hours, minutes, seconds)
@@ -87,7 +88,7 @@ describe("createTimestampedStdoutController", () => {
   it("prefixes stdout writes when enabled", () => {
     // given
     const stdout = createMockWriteStream()
-    const controller = createTimestampedStdoutController(testCoerce<NodeJS.WriteStream>(stdout))
+    const controller = createTimestampedStdoutController(unsafeTestValue<NodeJS.WriteStream>(stdout))
 
     // when
     controller.enable()
@@ -101,7 +102,7 @@ describe("createTimestampedStdoutController", () => {
   it("restores original write function", () => {
     // given
     const stdout = createMockWriteStream()
-    const controller = createTimestampedStdoutController(testCoerce<NodeJS.WriteStream>(stdout))
+    const controller = createTimestampedStdoutController(unsafeTestValue<NodeJS.WriteStream>(stdout))
     controller.enable()
 
     // when
@@ -118,7 +119,7 @@ describe("createTimestampedStdoutController", () => {
   it("supports Uint8Array chunks and encoding", () => {
     // given
     const stdout = createMockWriteStream()
-    const controller = createTimestampedStdoutController(testCoerce<NodeJS.WriteStream>(stdout))
+    const controller = createTimestampedStdoutController(unsafeTestValue<NodeJS.WriteStream>(stdout))
 
     // when
     controller.enable()

src/features/background-agent/background-task-notification-template.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, test } from "bun:test"
 import { buildBackgroundTaskNotificationText } from "./background-task-notification-template"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("buildBackgroundTaskNotificationText", () => {
   describe("#given one task still running after a completed task notification", () => {
@@ -134,7 +135,7 @@ Use \`background_output(task_id="<id>")\` to retrieve each result.
       const notification = buildBackgroundTaskNotificationText({
         task: {
           id: "bg_abc123",
-          description: testCoerce<string>(undefined),
+          description: unsafeTestValue<string>(undefined),
           status: "completed",
         },
         duration: "5s",
@@ -142,8 +143,8 @@ Use \`background_output(task_id="<id>")\` to retrieve each result.
         allComplete: true,
         remainingCount: 0,
         completedTasks: [
-          { id: "bg_abc123", description: testCoerce<string>(undefined), status: "completed" },
-          { id: "bg_def456", description: testCoerce<string>(undefined), status: "completed" },
+          { id: "bg_abc123", description: unsafeTestValue<string>(undefined), status: "completed" },
+          { id: "bg_def456", description: unsafeTestValue<string>(undefined), status: "completed" },
         ],
       })
 
@@ -230,7 +231,7 @@ Use \`background_output(task_id="<id>")\` to retrieve each result.
       const notification = buildBackgroundTaskNotificationText({
         task: {
           id: "bg_xyz789",
-          description: testCoerce<string>(undefined),
+          description: unsafeTestValue<string>(undefined),
           status: "completed",
         },
         duration: "3s",

src/features/background-agent/compaction-aware-message-resolver.test.ts

@@ -12,6 +12,7 @@ import {
   setCompactionAgentConfigCheckpoint,
 } from "../../shared/compaction-agent-config-checkpoint"
 import { getCompactionPartStorageDir } from "../../shared/compaction-marker"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("isCompactionAgent", () => {
   describe("#given agent name variations", () => {
@@ -49,7 +50,7 @@ describe("isCompactionAgent", () => {
 
     test("returns false for null", () => {
       // when
-      const result = isCompactionAgent(testCoerce<string>(null))
+      const result = isCompactionAgent(unsafeTestValue<string>(null))
 
       // then
       expect(result).toBe(false)

src/features/background-agent/manager-circuit-breaker.test.ts

@@ -6,6 +6,7 @@ import { tmpdir } from "node:os"
 import type { BackgroundTaskConfig } from "../../config/schema"
 import { BackgroundManager } from "./manager"
 import type { BackgroundTask } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createManager(config?: BackgroundTaskConfig): BackgroundManager {
   const client = {
@@ -16,8 +17,8 @@ function createManager(config?: BackgroundTaskConfig): BackgroundManager {
     },
   }
 
-  const manager = new BackgroundManager({ pluginContext: testCoerce<PluginInput>({ client, directory: tmpdir() }), config: config })
-  const testManager = testCoerce<{
+  const manager = new BackgroundManager({ pluginContext: unsafeTestValue<PluginInput>({ client, directory: tmpdir() }), config: config })
+  const testManager = unsafeTestValue<{
     enqueueNotificationForParent: (sessionId: string, fn: () => Promise<void>) => Promise<void>
     notifyParentSession: (task: BackgroundTask) => Promise<void>
     tasks: Map<string, BackgroundTask>
@@ -32,7 +33,7 @@ function createManager(config?: BackgroundTaskConfig): BackgroundManager {
 }
 
 function getTaskMap(manager: BackgroundManager): Map<string, BackgroundTask> {
-  return (testCoerce<{ tasks: Map<string, BackgroundTask> }>(manager)).tasks
+  return (unsafeTestValue<{ tasks: Map<string, BackgroundTask> }>(manager)).tasks
 }
 
 async function flushAsyncWork() {

src/features/background-agent/manager-session-permission.test.ts

@@ -4,6 +4,7 @@ import { tmpdir } from "node:os"
 import type { PluginInput } from "@opencode-ai/plugin"
 
 import { BackgroundManager } from "./manager"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("BackgroundManager session permission", () => {
   test("passes query directory when loading the parent session", async () => {
@@ -21,7 +22,7 @@ describe("BackgroundManager session permission", () => {
       },
     }
     const directory = tmpdir()
-    const manager = new BackgroundManager({ pluginContext: testCoerce<PluginInput>({ client, directory }) })
+    const manager = new BackgroundManager({ pluginContext: unsafeTestValue<PluginInput>({ client, directory }) })
 
     // when
     await manager.launch({
@@ -62,7 +63,7 @@ describe("BackgroundManager session permission", () => {
         abort: async () => ({}),
       },
     }
-    const manager = new BackgroundManager({ pluginContext: testCoerce<PluginInput>({ client, directory: tmpdir() }) })
+    const manager = new BackgroundManager({ pluginContext: unsafeTestValue<PluginInput>({ client, directory: tmpdir() }) })
 
     // when
     await manager.launch({

src/features/background-agent/session-existence.test.ts

@@ -2,12 +2,13 @@ import { describe, expect, mock, test } from "bun:test"
 
 import type { OpencodeClient } from "./opencode-client"
 import { verifySessionExists } from "./session-existence"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("verifySessionExists", () => {
   test("passes query directory to session lookup when provided", async () => {
     // given
     const get = mock(async () => ({ data: { id: "session-123" } }))
-    const client = testCoerce<OpencodeClient>({
+    const client = unsafeTestValue<OpencodeClient>({
       session: {
         get,
       },

src/features/background-agent/subagent-spawn-limits.test.ts

@@ -6,6 +6,7 @@ import {
   DEFAULT_MAX_SUBAGENT_DEPTH,
   createSubagentDepthLimitError,
 } from "./subagent-spawn-limits"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createMockClient(sessionGet: OpencodeClient["session"]["get"]): OpencodeClient {
   return {
@@ -20,7 +21,7 @@ describe("resolveSubagentSpawnContext", () => {
     test("passes query.directory to each session.get call", async () => {
       // given
       const sessionGetCalls: Array<Record<string, unknown>> = []
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (input) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (input) => {
         sessionGetCalls.push(input as Record<string, unknown>)
         if (input.path.id === "child-session") {
           return { data: { id: "child-session", parentID: "root-session" } }
@@ -50,7 +51,7 @@ describe("resolveSubagentSpawnContext", () => {
   describe("#given session.get returns an SDK error response", () => {
     test("throws a fail-closed spawn blocked error", async () => {
       // given
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async () => ({
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async () => ({
         error: "lookup failed",
         data: undefined,
       }))))
@@ -66,7 +67,7 @@ describe("resolveSubagentSpawnContext", () => {
   describe("#given session.get returns no session data", () => {
     test("throws a fail-closed spawn blocked error", async () => {
       // given
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async () => ({
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async () => ({
         data: undefined,
       }))))
 
@@ -81,7 +82,7 @@ describe("resolveSubagentSpawnContext", () => {
   describe("depth calculation smoke tests (regression guard)", () => {
     test("root session (no parentID) reports depth 0 and childDepth 1", async () => {
       // given - a root session with no parent
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (opts) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (opts) => {
         if (opts.path.id === "root-session") {
           return { data: { id: "root-session", parentID: undefined } }
         }
@@ -99,7 +100,7 @@ describe("resolveSubagentSpawnContext", () => {
 
     test("depth-1 child reports childDepth 2", async () => {
       // given - child -> root chain
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (opts) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (opts) => {
         if (opts.path.id === "child-1") {
           return { data: { id: "child-1", parentID: "root-session" } }
         }
@@ -120,7 +121,7 @@ describe("resolveSubagentSpawnContext", () => {
 
     test("depth-2 grandchild reports childDepth 3", async () => {
       // given - grandchild -> child -> root chain
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (opts) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (opts) => {
         const sessions: Record<string, { id: string; parentID?: string }> = {
           "grandchild": { id: "grandchild", parentID: "child" },
           "child": { id: "child", parentID: "root" },
@@ -153,7 +154,7 @@ describe("resolveSubagentSpawnContext", () => {
         }
       }
 
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (opts) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (opts) => {
         const session = sessions[opts.path.id]
         if (session) return { data: session }
         return { error: "not found", data: undefined }
@@ -170,7 +171,7 @@ describe("resolveSubagentSpawnContext", () => {
 
     test("detects parent cycle and throws", async () => {
       // given - A -> B -> A (cycle)
-      const client = createMockClient(testCoerce<OpencodeClient["session"]["get"]>((async (opts) => {
+      const client = createMockClient(unsafeTestValue<OpencodeClient["session"]["get"]>((async (opts) => {
         const sessions: Record<string, { id: string; parentID?: string }> = {
           "session-a": { id: "session-a", parentID: "session-b" },
           "session-b": { id: "session-b", parentID: "session-a" },

src/features/context-injector/injector.test.ts

@@ -3,6 +3,7 @@ import { ContextCollector } from "./collector"
 import {
   createContextInjectorMessagesTransformHook,
 } from "./injector"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("createContextInjectorMessagesTransformHook", () => {
   let collector: ContextCollector
@@ -51,7 +52,7 @@ describe("createContextInjectorMessagesTransformHook", () => {
       createMockMessage("user", "Second message", sessionID),
     ]
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const output = testCoerce({ messages })
+    const output = unsafeTestValue({ messages })
 
     // when
     await hook["experimental.chat.messages.transform"]!({}, output)
@@ -115,7 +116,7 @@ describe("createContextInjectorMessagesTransformHook", () => {
     const sessionID = "ses_transform2"
     const messages = [createMockMessage("user", "Hello world", sessionID)]
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const output = testCoerce({ messages })
+    const output = unsafeTestValue({ messages })
 
     // when
     await hook["experimental.chat.messages.transform"]!({}, output)
@@ -135,7 +136,7 @@ describe("createContextInjectorMessagesTransformHook", () => {
     })
     const messages = [createMockMessage("assistant", "Response", sessionID)]
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const output = testCoerce({ messages })
+    const output = unsafeTestValue({ messages })
 
     // when
     await hook["experimental.chat.messages.transform"]!({}, output)
@@ -156,7 +157,7 @@ describe("createContextInjectorMessagesTransformHook", () => {
     })
     const messages = [createMockMessage("user", "Message", sessionID)]
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const output = testCoerce({ messages })
+    const output = unsafeTestValue({ messages })
 
     // when
     await hook["experimental.chat.messages.transform"]!({}, output)

src/features/hook-message-injector/injector.test.ts

@@ -11,6 +11,7 @@ import {
   injectHookMessage,
 } from "./injector"
 import { getCompactionPartStorageDir } from "../../shared/compaction-marker"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 //#region Mocks
 
@@ -73,7 +74,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { info: { agent: "sisyphus", model: { providerID: "anthropic", modelID: "claude-opus-4" } } },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toEqual({
       agent: "sisyphus",
@@ -87,7 +88,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { info: { agent: "sisyphus", providerID: "openai", modelID: "gpt-5" } },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toEqual({
       agent: "sisyphus",
@@ -102,7 +103,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { id: "msg_new", info: { agent: "new-agent", model: { providerID: "new", modelID: "model" }, time: { created: 20 } } },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result?.agent).toBe("new-agent")
   })
@@ -112,7 +113,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { info: { agent: "partial-agent" } },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result?.agent).toBe("partial-agent")
   })
@@ -123,7 +124,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { info: {} },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBeNull()
   })
@@ -131,7 +132,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
   it("returns null when messages array is empty", async () => {
     const mockClient = createMockClient([])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBeNull()
   })
@@ -145,7 +146,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       },
     }
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBeNull()
   })
@@ -161,7 +162,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result?.tools).toEqual({ edit: true, write: false })
   })
@@ -172,7 +173,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       { id: "msg_older", info: { agent: "newest-by-time", model: { providerID: "openai", modelID: "gpt-5" }, time: { created: 100 } } },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result?.agent).toBe("newest-by-time")
   })
@@ -190,7 +191,7 @@ describe("findNearestMessageWithFieldsFromSDK", () => {
       },
     ])
 
-    const result = await findNearestMessageWithFieldsFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findNearestMessageWithFieldsFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result?.agent).toBe("sisyphus")
   })
@@ -252,7 +253,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       { info: { agent: "second-agent" } },
     ])
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBe("first-agent")
   })
@@ -263,7 +264,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       { id: "msg_early", info: { agent: "earliest-agent", time: { created: 10 } } },
     ])
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBe("earliest-agent")
   })
@@ -274,7 +275,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       { id: "msg_real", info: { agent: "sisyphus", time: { created: 20 } } },
     ])
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBe("sisyphus")
   })
@@ -285,7 +286,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       { info: { agent: "first-real-agent" } },
     ])
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBe("first-real-agent")
   })
@@ -296,7 +297,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       { info: {} },
     ])
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBeNull()
   })
@@ -310,7 +311,7 @@ describe("findFirstMessageWithAgentFromSDK", () => {
       },
     }
 
-    const result = await findFirstMessageWithAgentFromSDK(testCoerce(mockClient), "ses_123")
+    const result = await findFirstMessageWithAgentFromSDK(unsafeTestValue(mockClient), "ses_123")
 
     expect(result).toBeNull()
   })

src/features/skill-mcp-manager/manager.test.ts

@@ -6,6 +6,7 @@ import type { OAuthTokenData } from "../mcp-oauth/storage"
 import { setHttpClientDependenciesForTesting } from "./http-client"
 import { setStdioClientDependenciesForTesting } from "./stdio-client"
 import { SkillMcpManager } from "./manager"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const mockHttpConnect = mock(() => Promise.reject(new Error("Mocked HTTP connection failure")))
 const mockHttpClose = mock(() => Promise.resolve())
@@ -634,7 +635,7 @@ describe("SkillMcpManager", () => {
         close: mock(() => Promise.resolve()),
       }
 
-      const getOrCreateSpy = spyOn(testCoerce(manager), "getOrCreateClientWithRetry")
+      const getOrCreateSpy = spyOn(unsafeTestValue(manager), "getOrCreateClientWithRetry")
       getOrCreateSpy.mockResolvedValue(mockClient)
 
       // when
@@ -668,7 +669,7 @@ describe("SkillMcpManager", () => {
         close: mock(() => Promise.resolve()),
       }
 
-      const getOrCreateSpy = spyOn(testCoerce(manager), "getOrCreateClientWithRetry")
+      const getOrCreateSpy = spyOn(unsafeTestValue(manager), "getOrCreateClientWithRetry")
       getOrCreateSpy.mockResolvedValue(mockClient)
 
       // when / #then
@@ -700,7 +701,7 @@ describe("SkillMcpManager", () => {
         close: mock(() => Promise.resolve()),
       }
 
-      const getOrCreateSpy = spyOn(testCoerce(manager), "getOrCreateClientWithRetry")
+      const getOrCreateSpy = spyOn(unsafeTestValue(manager), "getOrCreateClientWithRetry")
       getOrCreateSpy.mockResolvedValue(mockClient)
 
       // when / #then
@@ -929,7 +930,7 @@ describe("SkillMcpManager", () => {
         close: mock(() => Promise.resolve()),
       }
 
-      const getOrCreateSpy = spyOn(testCoerce(manager), "getOrCreateClientWithRetry")
+      const getOrCreateSpy = spyOn(unsafeTestValue(manager), "getOrCreateClientWithRetry")
       getOrCreateSpy.mockResolvedValue(mockClient)
 
       // when
@@ -962,7 +963,7 @@ describe("SkillMcpManager", () => {
         close: mock(() => Promise.resolve()),
       }
 
-      const getOrCreateSpy = spyOn(testCoerce(manager), "getOrCreateClientWithRetry")
+      const getOrCreateSpy = spyOn(unsafeTestValue(manager), "getOrCreateClientWithRetry")
       getOrCreateSpy.mockResolvedValue(mockClient)
 
       // when / #then

src/features/task-toast-manager/manager.test.ts

@@ -1,6 +1,7 @@
 declare const require: (name: string) => any
 const { describe, test, expect, beforeEach, afterEach, mock } = require("bun:test")
 import type { ConcurrencyManager } from "../background-agent/concurrency"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type TaskToastManagerClass = typeof import("./manager").TaskToastManager
 
@@ -20,7 +21,7 @@ describe("TaskToastManager", () => {
         showToast: mock(() => Promise.resolve()),
       },
     }
-    mockConcurrencyManager = testCoerce<ConcurrencyManager>({
+    mockConcurrencyManager = unsafeTestValue<ConcurrencyManager>({
       getConcurrencyLimit: mock(() => 5),
     })
 
@@ -28,7 +29,7 @@ describe("TaskToastManager", () => {
     TaskToastManager = mod.TaskToastManager
 
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    toastManager = new TaskToastManager(testCoerce(mockClient), mockConcurrencyManager)
+    toastManager = new TaskToastManager(unsafeTestValue(mockClient), mockConcurrencyManager)
   })
 
   afterEach(() => {
@@ -108,14 +109,14 @@ describe("TaskToastManager", () => {
 
     test("should display concurrency limit info when available", () => {
       // given - a concurrency manager with known limit
-      const mockConcurrencyWithCounts = testCoerce<ConcurrencyManager>({
+      const mockConcurrencyWithCounts = unsafeTestValue<ConcurrencyManager>({
         getConcurrencyLimit: mock(() => 5),
         getRunningCount: mock(() => 2),
         getQueuedCount: mock(() => 1),
       })
 
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
-      const managerWithConcurrency = new TaskToastManager(testCoerce(mockClient), mockConcurrencyWithCounts)
+      const managerWithConcurrency = new TaskToastManager(unsafeTestValue(mockClient), mockConcurrencyWithCounts)
 
       // when - a task is added
       managerWithConcurrency.addTask({
@@ -357,11 +358,11 @@ describe("TaskToastManager", () => {
 
     test("should show model name in queued tasks too", () => {
       // given - a concurrency manager that limits to 1
-      const limitedConcurrency = testCoerce<ConcurrencyManager>({
+      const limitedConcurrency = unsafeTestValue<ConcurrencyManager>({
         getConcurrencyLimit: mock(() => 1),
       })
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
-      const limitedManager = new TaskToastManager(testCoerce(mockClient), limitedConcurrency)
+      const limitedManager = new TaskToastManager(unsafeTestValue(mockClient), limitedConcurrency)
 
       limitedManager.addTask({
         id: "task_running",

src/features/team-mode/team-runtime/cleanup-team-run-resources.test.ts

@@ -16,6 +16,7 @@ import {
 import { saveRuntimeState } from "../team-state-store/store"
 import type { RuntimeState } from "../types"
 import { cleanupTeamRunResources } from "./cleanup-team-run-resources"
+import { unsafeTestValue } from "../../../../test-support/unsafe-test-value"
 
 const temporaryDirectories: string[] = []
 
@@ -41,7 +42,7 @@ function createRuntimeState(teamRunId: string): RuntimeState {
 }
 
 function createStubBgMgr(): BackgroundManager {
-  return testCoerce<BackgroundManager>({
+  return unsafeTestValue<BackgroundManager>({
     cancelTask: async () => undefined,
   })
 }

src/features/tmux-subagent/polling-manager.test.ts

@@ -1,6 +1,7 @@
 import { describe, test, expect } from "bun:test"
 import { TmuxPollingManager } from "./polling-manager"
 import type { TrackedSession } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("TmuxPollingManager overlap", () => {
   test("skips overlapping pollSessions executions", async () => {
@@ -39,15 +40,15 @@ describe("TmuxPollingManager overlap", () => {
     }
 
     const manager = new TmuxPollingManager(
-      testCoerce<import("../../tools/delegate-task/types").OpencodeClient>(client),
+      unsafeTestValue<import("../../tools/delegate-task/types").OpencodeClient>(client),
       sessions,
       async () => {},
     )
 
     //#when
-    const firstPoll = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions()
+    const firstPoll = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions()
     await Promise.resolve()
-    const secondPoll = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions()
+    const secondPoll = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions()
     releaseStatus?.()
     await Promise.all([firstPoll, secondPoll])
 
@@ -85,7 +86,7 @@ describe("TmuxPollingManager overlap", () => {
     }
 
     const manager = new TmuxPollingManager(
-      testCoerce<import("../../tools/delegate-task/types").OpencodeClient>(client),
+      unsafeTestValue<import("../../tools/delegate-task/types").OpencodeClient>(client),
       sessions,
       async (sessionId) => {
         closedSessionIds.push(sessionId)
@@ -98,7 +99,7 @@ describe("TmuxPollingManager overlap", () => {
     })
 
     //#when
-    const pollSessions = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
+    const pollSessions = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
     await pollSessions.call(manager)
     await pollSessions.call(manager)
     await pollSessions.call(manager)
@@ -132,7 +133,7 @@ describe("TmuxPollingManager overlap", () => {
     }
 
     const manager = new TmuxPollingManager(
-      testCoerce<import("../../tools/delegate-task/types").OpencodeClient>(client),
+      unsafeTestValue<import("../../tools/delegate-task/types").OpencodeClient>(client),
       sessions,
       async (sessionId) => {
         closedSessionIds.push(sessionId)
@@ -140,7 +141,7 @@ describe("TmuxPollingManager overlap", () => {
     )
 
     // when
-    const pollSessions = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
+    const pollSessions = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
     await pollSessions.call(manager)
 
     // then
@@ -171,7 +172,7 @@ describe("TmuxPollingManager overlap", () => {
     }
 
     const manager = new TmuxPollingManager(
-      testCoerce<import("../../tools/delegate-task/types").OpencodeClient>(client),
+      unsafeTestValue<import("../../tools/delegate-task/types").OpencodeClient>(client),
       sessions,
       async (sessionId) => {
         closedSessionIds.push(sessionId)
@@ -179,7 +180,7 @@ describe("TmuxPollingManager overlap", () => {
     )
 
     // when
-    const pollSessions = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
+    const pollSessions = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
     await pollSessions.call(manager)
 
     // then
@@ -222,13 +223,13 @@ describe("TmuxPollingManager overlap", () => {
     }
 
     manager = new TmuxPollingManager(
-      testCoerce<import("../../tools/delegate-task/types").OpencodeClient>(client),
+      unsafeTestValue<import("../../tools/delegate-task/types").OpencodeClient>(client),
       sessions,
       async (sessionId) => {
         closedSessionIds.push(sessionId)
       },
     )
-    const pollSessions = (testCoerce<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
+    const pollSessions = (unsafeTestValue<{ pollSessions: () => Promise<void> }>(manager)).pollSessions
 
     // when
     await pollSessions.call(manager)

src/hooks/anthropic-context-window-limit-recovery/executor.test.ts

@@ -5,6 +5,7 @@ import { executeCompact } from "./executor"
 import type { AutoCompactState } from "./types"
 import * as recoveryStrategy from "./recovery-strategy"
 import * as messagesReader from "../session-recovery/storage/messages-reader"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type TimerCallback = (...args: any[]) => void
 
@@ -37,7 +38,7 @@ function createFakeTimeouts(): FakeTimeouts {
       callback,
       args,
     })
-    return testCoerce<ReturnType<typeof setTimeout>>(id)
+    return unsafeTestValue<ReturnType<typeof setTimeout>>(id)
   }) as typeof setTimeout
 
   globalThis.clearTimeout = ((id?: number) => {
@@ -243,7 +244,7 @@ describe("executeCompact lock management", () => {
     await executeCompact(sessionID, msg, autoCompactState, mockClient, directory, pluginConfig)
 
     // then: Toast should be shown
-    const toastCalls = (testCoerce(mockClient.tui.showToast)).mock.calls
+    const toastCalls = (unsafeTestValue(mockClient.tui.showToast)).mock.calls
     const blockedToast = toastCalls.find(
       (call: any) => call[0]?.body?.title === "Compact In Progress",
     )
@@ -276,7 +277,7 @@ describe("executeCompact lock management", () => {
     await executeCompact(sessionID, msg, autoCompactState, mockClient, directory, pluginConfig)
 
     // then: Should show failure toast
-    const toastCalls = (testCoerce(mockClient.tui.showToast)).mock.calls
+    const toastCalls = (unsafeTestValue(mockClient.tui.showToast)).mock.calls
     const failureToast = toastCalls.find(
       (call: any) => call[0]?.body?.title === "Auto Compact Failed",
     )

src/hooks/anthropic-context-window-limit-recovery/recovery-deduplication.test.ts

@@ -2,6 +2,7 @@ import { describe, test, expect, mock, beforeEach, afterAll } from "bun:test"
 import type { PluginInput } from "@opencode-ai/plugin"
 import type { ExperimentalConfig } from "../../config"
 import * as originalDeduplicationRecovery from "./deduplication-recovery"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const attemptDeduplicationRecoveryMock = mock(async () => {})
 
@@ -20,7 +21,7 @@ function createImmediateTimeouts(): () => void {
 
   globalThis.setTimeout = ((callback: (...args: unknown[]) => void, _delay?: number, ...args: unknown[]) => {
     callback(...args)
-    return testCoerce<ReturnType<typeof setTimeout>>(0)
+    return unsafeTestValue<ReturnType<typeof setTimeout>>(0)
   }) as typeof setTimeout
 
   globalThis.clearTimeout = ((_: ReturnType<typeof setTimeout>) => {}) as typeof clearTimeout

src/hooks/anthropic-context-window-limit-recovery/summarize-retry-strategy.test.ts

@@ -2,6 +2,7 @@ import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
 import { runSummarizeRetryStrategy } from "./summarize-retry-strategy"
 import type { AutoCompactState, ParsedTokenLimitError, RetryState } from "./types"
 import type { OhMyOpenCodeConfig } from "../../config"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type TimeoutCall = {
   handle: ReturnType<typeof setTimeout>
@@ -95,7 +96,7 @@ describe("runSummarizeRetryStrategy", () => {
     //#given
     const timeoutCalls: TimeoutCall[] = []
     globalThis.setTimeout = ((_: (...args: unknown[]) => void, delay?: number) => {
-      const handle = testCoerce<ReturnType<typeof setTimeout>>(timeoutCalls.length + 1)
+      const handle = unsafeTestValue<ReturnType<typeof setTimeout>>(timeoutCalls.length + 1)
       timeoutCalls.push({ handle, delay: delay ?? 0 })
       return handle
     }) as typeof setTimeout
@@ -132,7 +133,7 @@ describe("runSummarizeRetryStrategy", () => {
     let scheduledCallback: (() => void) | undefined
     globalThis.setTimeout = ((callback: (...args: unknown[]) => void, _delay?: number) => {
       scheduledCallback = () => callback()
-      return testCoerce<ReturnType<typeof setTimeout>>(1)
+      return unsafeTestValue<ReturnType<typeof setTimeout>>(1)
     }) as typeof setTimeout
 
     autoCompactState.pendingCompact.add(sessionID)
@@ -176,7 +177,7 @@ describe("runSummarizeRetryStrategy", () => {
     autoCompactState.emptyContentAttemptBySession.set(sessionID, 3)
     autoCompactState.retryTimerBySession.set(
       sessionID,
-      testCoerce<ReturnType<typeof setTimeout>>(1),
+      unsafeTestValue<ReturnType<typeof setTimeout>>(1),
     )
 
     //#when

src/hooks/atlas/background-task-retry.test.ts

@@ -7,6 +7,7 @@ import type { PluginInput } from "@opencode-ai/plugin"
 import { createAtlasHook } from "./atlas-hook"
 import { clearBoulderState, writeBoulderState } from "../../features/boulder-state"
 import { _resetForTesting, clearSessionAgent, registerAgentName, setSessionAgent } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 // Force process isolation in CI runner (globalThis.setTimeout override conflicts with other atlas tests)
 mock.module("../../shared/opencode-storage-detection", () => ({
@@ -79,7 +80,7 @@ describe("atlas background task retry", () => {
           callback: () => (callback as LongTimerCallback)(...args),
           cleared: false,
         })
-        return testCoerce<ReturnType<typeof setTimeout>>(id)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(id)
       }
 
       return originalSetTimeout(callback, delay, ...args)
@@ -120,7 +121,7 @@ describe("atlas background task retry", () => {
 
     let backgroundRunning = true
     const promptMock = mock(async () => ({}))
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -130,7 +131,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => backgroundRunning ? [{ status: "running" }] : [],
@@ -161,7 +162,7 @@ describe("atlas background task retry", () => {
 
     let backgroundRunning = true
     const promptMock = mock(async () => ({}))
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -171,7 +172,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => backgroundRunning ? [{ status: "running" }] : [],
@@ -204,7 +205,7 @@ describe("atlas background task retry", () => {
 
     let remainingRunningRetries = 2
     const promptMock = mock(async () => ({}))
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -214,7 +215,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => {
@@ -258,7 +259,7 @@ describe("atlas background task retry", () => {
     const promptAsyncMock = mock(async () => ({}))
     let backgroundCheckCount = 0
 
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -268,7 +269,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => {
@@ -313,7 +314,7 @@ describe("atlas background task retry", () => {
 
     let backgroundRunning = true
     const promptAsyncMock = mock(async () => ({}))
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -323,7 +324,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => backgroundRunning ? [{ status: "running" }] : [],
@@ -366,7 +367,7 @@ describe("atlas background task retry", () => {
     let backgroundRunning = true
     let descendantAgent = "atlas"
     const promptAsyncMock = mock(async () => ({}))
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -386,7 +387,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: (currentSessionID: string) => {
@@ -424,7 +425,7 @@ describe("atlas background task retry", () => {
 
     const deferredPrompt = createDeferred<{}>()
     const promptAsyncMock = mock(() => deferredPrompt.promise)
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -462,7 +463,7 @@ describe("atlas background task retry", () => {
     promptAsyncMock.mockImplementationOnce(() => deferredPrompt.promise)
     promptAsyncMock.mockImplementationOnce(async () => ({}))
 
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -472,7 +473,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => [],
@@ -515,7 +516,7 @@ describe("atlas background task retry", () => {
     })
     promptAsyncMock.mockImplementationOnce(async () => ({}))
 
-    const hook = createAtlasHook(testCoerce<PluginInput>({
+    const hook = createAtlasHook(unsafeTestValue<PluginInput>({
       directory: testDir,
       client: {
         session: {
@@ -525,7 +526,7 @@ describe("atlas background task retry", () => {
       },
     }), {
       directory: testDir,
-      backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
+      backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"] & {
         getTasksByParentSession: (sessionID: string) => Array<{ status: string }>
       }>({
         getTasksByParentSession: () => backgroundRunning ? [{ status: "running" }] : [],

src/hooks/atlas/boulder-continuation-injector.test.ts

@@ -2,6 +2,7 @@ import { describe, test, expect, beforeEach, afterEach, mock } from "bun:test"
 import type { PluginInput } from "@opencode-ai/plugin"
 import { registerAgentName, _resetForTesting } from "../../features/claude-code-session-state"
 import { injectBoulderContinuation } from "./boulder-continuation-injector"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("injectBoulderContinuation", () => {
   beforeEach(() => {
@@ -20,7 +21,7 @@ describe("injectBoulderContinuation", () => {
     const promptAsyncMock = mock(async (_request: unknown) => undefined)
     const messagesMock = mock(async () => ({ data: [] }))
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: "/tmp",
       client: {
         session: {
@@ -60,7 +61,7 @@ describe("injectBoulderContinuation", () => {
     const messagesMock = mock(async () => ({ data: [] }))
     const sessionState = { promptFailureCount: 2, lastContinuationInjectedAt: 123 }
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: "/tmp",
       client: {
         session: {
@@ -78,7 +79,7 @@ describe("injectBoulderContinuation", () => {
       remaining: 1,
       total: 2,
       agent: "atlas",
-      backgroundManager: testCoerce<Parameters<typeof injectBoulderContinuation>[0]["backgroundManager"]>({
+      backgroundManager: unsafeTestValue<Parameters<typeof injectBoulderContinuation>[0]["backgroundManager"]>({
         getTasksByParentSession: () => [{ status: "running" }],
       }),
       sessionState,
@@ -98,7 +99,7 @@ describe("injectBoulderContinuation", () => {
     const messagesMock = mock(async () => ({ data: [] }))
     const sessionState = { promptFailureCount: 1, lastContinuationInjectedAt: 456 }
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: "/tmp",
       client: {
         session: {
@@ -116,7 +117,7 @@ describe("injectBoulderContinuation", () => {
       remaining: 1,
       total: 2,
       agent: "atlas",
-      backgroundManager: testCoerce<Parameters<typeof injectBoulderContinuation>[0]["backgroundManager"]>({
+      backgroundManager: unsafeTestValue<Parameters<typeof injectBoulderContinuation>[0]["backgroundManager"]>({
         getTasksByParentSession: () => [{ status: "pending" }],
       }),
       sessionState,
@@ -134,7 +135,7 @@ describe("injectBoulderContinuation", () => {
     const promptAsyncMock = mock(async (_request: unknown) => undefined)
     const messagesMock = mock(async () => ({ data: [] }))
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: "/tmp",
       client: {
         session: {
@@ -189,7 +190,7 @@ describe("injectBoulderContinuation", () => {
       }],
     }))
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: "/tmp",
       client: {
         session: {

src/hooks/atlas/idle-event-complete-boulder.test.ts

@@ -4,6 +4,7 @@ import { existsSync, mkdirSync, rmSync, writeFileSync } from "node:fs"
 import { tmpdir } from "node:os"
 import { join } from "node:path"
 import { clearBoulderState, readBoulderState, writeBoulderState } from "../../features/boulder-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const { createAtlasHook } = await import("./index")
 
@@ -49,7 +50,7 @@ describe("atlas hook idle-event complete boulder", () => {
       },
     })
 
-    const hook = createAtlasHook(testCoerce<Parameters<typeof createAtlasHook>[0]>({
+    const hook = createAtlasHook(unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
       directory: testDirectory,
       client: {
         session: {

src/hooks/atlas/idle-event-lineage.test.ts

@@ -7,6 +7,7 @@ import { join } from "node:path"
 import { clearBoulderState, readBoulderState, writeBoulderState } from "../../features/boulder-state"
 import type { BoulderState } from "../../features/boulder-state"
 import { _resetForTesting, registerAgentName, setSessionAgent, subagentSessions } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const { createAtlasHook } = await import("./index")
 
@@ -32,7 +33,7 @@ describe("atlas hook idle-event session lineage", () => {
   }
 
   function createHook(parentSessionIDs?: Record<string, string | undefined>) {
-    return createAtlasHook(testCoerce<Parameters<typeof createAtlasHook>[0]>({
+    return createAtlasHook(unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
       directory: testDirectory,
       client: {
         session: {

src/hooks/atlas/idle-event-persisted-lineage.test.ts

@@ -8,6 +8,7 @@ import { randomUUID } from "node:crypto"
 import { clearBoulderState, readBoulderState, writeBoulderState } from "../../features/boulder-state"
 import { _resetForTesting, registerAgentName } from "../../features/claude-code-session-state"
 import type { BoulderState } from "../../features/boulder-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const TEST_STORAGE_ROOT = join(tmpdir(), `atlas-persisted-lineage-storage-${randomUUID()}`)
 const TEST_MESSAGE_STORAGE = join(TEST_STORAGE_ROOT, "message")
@@ -58,7 +59,7 @@ describe("atlas hook idle-event persisted lineage", () => {
     parentSessionIDs?: Record<string, string | undefined>,
     messagesBySession?: Record<string, Array<{ info: { agent: string; providerID: string; modelID: string } }>>,
   ) {
-    return createAtlasHook(testCoerce<Parameters<typeof createAtlasHook>[0]>({
+    return createAtlasHook(unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
       directory: testDirectory,
       client: {
         session: {
@@ -173,7 +174,7 @@ describe("atlas hook idle-event persisted lineage", () => {
       },
     })
 
-    const hook = createAtlasHook(testCoerce<Parameters<typeof createAtlasHook>[0]>({
+    const hook = createAtlasHook(unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
       directory: testDirectory,
       client: {
         session: {

src/hooks/atlas/idle-event.test.ts

@@ -8,6 +8,7 @@ import { createBoulderState, readBoulderState, writeBoulderState } from "../../f
 import { _resetForTesting, registerAgentName } from "../../features/claude-code-session-state"
 import { handleAtlasSessionIdle } from "./idle-event"
 import type { SessionState } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("handleAtlasSessionIdle completion nudge", () => {
   const SESSION_ID = "session-main-1"
@@ -76,7 +77,7 @@ describe("handleAtlasSessionIdle completion nudge", () => {
       return { data: {} }
     })
 
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       directory: testDirectory,
       client: {
         session: {

src/hooks/atlas/recent-model-resolver.test.ts

@@ -1,11 +1,12 @@
 import { describe, expect, mock, test } from "bun:test"
 import type { PluginInput } from "@opencode-ai/plugin"
 import { resolveRecentPromptContextForSession } from "./recent-model-resolver"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("resolveRecentPromptContextForSession", () => {
   test("uses message time.created rather than SDK array order for recent prompt context", async () => {
     // given
-    const ctx = testCoerce<PluginInput>({
+    const ctx = unsafeTestValue<PluginInput>({
       client: {
         session: {
           messages: mock(async () => ({

src/hooks/atlas/tool-execute-after-background-launch.test.ts

@@ -8,6 +8,7 @@ import type { PluginInput } from "@opencode-ai/plugin"
 import type { Project } from "@opencode-ai/sdk"
 import { readBoulderState, writeBoulderState } from "../../features/boulder-state"
 import { createToolExecuteBeforeHandler } from "./tool-execute-before"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const isCallerOrchestratorMock = mock(async () => true)
 const collectGitDiffStatsMock = mock(() => ({
@@ -80,7 +81,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
 
   function createHandler(parentSessionIDs?: Record<string, string | undefined>) {
     const project = createProject()
-    const client = testCoerce<PluginInput["client"]>({
+    const client = unsafeTestValue<PluginInput["client"]>({
       session: {
         get: async (input: SessionGetInput) => createSessionGetResult(parentSessionIDs?.[input.path.id]),
       },
@@ -141,7 +142,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
         const childSessionID = "ses_child123"
         const planPath = join(testDirectory, "background-launch-plan.md")
         const project = createProject()
-        const client = testCoerce<PluginInput["client"]>({
+        const client = unsafeTestValue<PluginInput["client"]>({
           session: {
             get: async () => createSessionGetResult(undefined),
           },
@@ -215,7 +216,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
         const childSessionID = "ses_child_lookup_failure"
         const planPath = join(testDirectory, "background-launch-plan.md")
         const project = createProject()
-        const client = testCoerce<PluginInput["client"]>({
+        const client = unsafeTestValue<PluginInput["client"]>({
           session: {
             get: async () => createSessionGetResult(undefined),
           },
@@ -288,7 +289,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
         const childSessionID = "ses_outside_lineage"
         const planPath = join(testDirectory, "background-launch-plan.md")
         const project = createProject()
-        const client = testCoerce<PluginInput["client"]>({
+        const client = unsafeTestValue<PluginInput["client"]>({
           session: {
             get: async () => createSessionGetResult(undefined),
           },
@@ -358,7 +359,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
         const childSessionID = "ses_unrelated_child"
         const planPath = join(testDirectory, "background-launch-plan.md")
         const project = createProject()
-        const client = testCoerce<PluginInput["client"]>({
+        const client = unsafeTestValue<PluginInput["client"]>({
           session: {
             get: async () => createSessionGetResult(undefined),
           },
@@ -431,7 +432,7 @@ describe("createToolExecuteAfterHandler background launch detection", () => {
         const planPathA = join(testDirectory, "background-launch-work-a.md")
         const planPathB = join(testDirectory, "background-launch-work-b.md")
         const project = createProject()
-        const client = testCoerce<PluginInput["client"]>({
+        const client = unsafeTestValue<PluginInput["client"]>({
           session: {
             get: async () => createSessionGetResult(undefined),
           },

src/hooks/auto-update-checker/checker/cached-version.test.ts

@@ -15,7 +15,7 @@ mock.module("../constants", () => ({
       const current = mockState.candidates
       // Forward array methods/properties to the mutable candidates list
       // so getCachedVersion's `for (... of ...)` sees fresh data per test.
-      const value = (testCoerce<Record<PropertyKey, unknown>>(current))[prop]
+      const value = (unsafeTestValue<Record<PropertyKey, unknown>>(current))[prop]
       if (typeof value === "function") {
         return (value as (...args: unknown[]) => unknown).bind(current)
       }
@@ -29,6 +29,7 @@ mock.module("./package-json-locator", () => ({
 }))
 
 import { getCachedVersion } from "./cached-version"
+import { unsafeTestValue } from "../../../../test-support/unsafe-test-value"
 
 describe("getCachedVersion (GH-3257)", () => {
   let cacheRoot: string

src/hooks/category-skill-reminder/index.test.ts

@@ -3,6 +3,7 @@ import { createCategorySkillReminderHook } from "./index"
 import { updateSessionAgent, clearSessionAgent, _resetForTesting } from "../../features/claude-code-session-state"
 import type { AvailableSkill } from "../../agents/dynamic-agent-prompt-builder"
 import * as sharedModule from "../../shared"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("category-skill-reminder hook", () => {
   let logCalls: Array<{ msg: string; data?: unknown }>
@@ -21,7 +22,7 @@ describe("category-skill-reminder hook", () => {
   })
 
   function createMockPluginInput() {
-    return testCoerce({
+    return unsafeTestValue({
       client: {
         tui: {
           showToast: async () => {},

src/hooks/claude-code-hooks/execute-http-hook-security.test.ts

@@ -3,6 +3,7 @@
 import { describe, it, expect, mock, beforeEach, afterEach } from "bun:test"
 import type { HookHttp } from "./types"
 import * as sharedModule from "../../shared"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const mockFetch = mock(() =>
   Promise.resolve(new Response(JSON.stringify({}), { status: 200 }))
@@ -31,7 +32,7 @@ describe("executeHttpHook TLS security", () => {
   let logCalls: Array<{ message: string; data?: unknown }>
 
   beforeEach(() => {
-    globalThis.fetch = testCoerce<typeof fetch>(mockFetch)
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mockFetch)
     mockFetch.mockReset()
     mockFetch.mockImplementation(() =>
       Promise.resolve(new Response(JSON.stringify({}), { status: 200 }))

src/hooks/claude-code-hooks/execute-http-hook.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect, mock, beforeEach, afterEach } from "bun:test"
 import type { HookHttp } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const mockFetch = mock(() =>
   Promise.resolve(new Response(JSON.stringify({}), { status: 200 }))
@@ -9,7 +10,7 @@ const originalFetch = globalThis.fetch
 
 describe("executeHttpHook", () => {
   beforeEach(() => {
-    globalThis.fetch = testCoerce<typeof fetch>(mockFetch)
+    globalThis.fetch = unsafeTestValue<typeof fetch>(mockFetch)
     mockFetch.mockReset()
     mockFetch.mockImplementation(() =>
       Promise.resolve(new Response(JSON.stringify({}), { status: 200 }))
@@ -33,7 +34,7 @@ describe("executeHttpHook", () => {
       await executeHttpHook(hook, stdinData)
 
       expect(mockFetch).toHaveBeenCalledTimes(1)
-      const [url, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [url, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       expect(url).toBe("http://localhost:8080/hooks/pre-tool-use")
       expect(options.method).toBe("POST")
       expect(options.body).toBe(stdinData)
@@ -44,7 +45,7 @@ describe("executeHttpHook", () => {
 
       await executeHttpHook(hook, stdinData)
 
-      const [, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       const headers = options.headers as Record<string, string>
       expect(headers["Content-Type"]).toBe("application/json")
     })
@@ -72,7 +73,7 @@ describe("executeHttpHook", () => {
 
       await executeHttpHook(hook, "{}")
 
-      const [, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       const headers = options.headers as Record<string, string>
       expect(headers["Authorization"]).toBe("Bearer secret-123")
     })
@@ -88,7 +89,7 @@ describe("executeHttpHook", () => {
 
       await executeHttpHook(hook, "{}")
 
-      const [, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       const headers = options.headers as Record<string, string>
       expect(headers["Authorization"]).toBe("Bearer secret-123")
     })
@@ -104,7 +105,7 @@ describe("executeHttpHook", () => {
 
       await executeHttpHook(hook, "{}")
 
-      const [, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       const headers = options.headers as Record<string, string>
       expect(headers["Authorization"]).toBe("Bearer ")
     })
@@ -121,7 +122,7 @@ describe("executeHttpHook", () => {
 
       await executeHttpHook(hook, "{}")
 
-      const [, options] = testCoerce<[string, RequestInit]>(mockFetch.mock.calls[0])
+      const [, options] = unsafeTestValue<[string, RequestInit]>(mockFetch.mock.calls[0])
       expect(options.signal).toBeDefined()
     })
   })

src/hooks/claude-code-hooks/tool-input-cache.test.ts

@@ -1,4 +1,5 @@
 import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("tool-input-cache", () => {
   const originalSetInterval = globalThis.setInterval
@@ -33,11 +34,11 @@ describe("tool-input-cache", () => {
 
   test("#given cleanup timer started #when stop cleanup runs #then interval is cleared and cache is emptied", async () => {
     //#given
-    const intervalHandle = testCoerce<ReturnType<typeof setInterval>>({ unref: mock(() => {}) })
+    const intervalHandle = unsafeTestValue<ReturnType<typeof setInterval>>({ unref: mock(() => {}) })
     const setIntervalMock = mock(() => intervalHandle)
     const clearIntervalMock = mock(() => {})
-    globalThis.setInterval = testCoerce<typeof setInterval>(setIntervalMock)
-    globalThis.clearInterval = testCoerce<typeof clearInterval>(clearIntervalMock)
+    globalThis.setInterval = unsafeTestValue<typeof setInterval>(setIntervalMock)
+    globalThis.clearInterval = unsafeTestValue<typeof clearInterval>(clearIntervalMock)
 
     const modulePath = new URL("./tool-input-cache.ts", import.meta.url).pathname
     const cacheModule = await import(`${modulePath}?stop-clear`)

src/hooks/comment-checker/cli.test.ts

@@ -5,6 +5,7 @@ import { tmpdir } from "node:os"
 
 import { processWithCli } from "./cli-runner"
 import type { PendingCall } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createMockInput() {
   return {
@@ -74,7 +75,7 @@ done
       const originalSetTimeout = globalThis.setTimeout
       globalThis.setTimeout = ((fn: (...args: unknown[]) => void, _ms?: number) => {
         fn()
-        return testCoerce<ReturnType<typeof setTimeout>>(0)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(0)
       }) as typeof setTimeout
 
       try {
@@ -102,7 +103,7 @@ done
       const originalSetTimeout = globalThis.setTimeout
       globalThis.setTimeout = ((fn: (...args: unknown[]) => void, _ms?: number) => {
         fn()
-        return testCoerce<ReturnType<typeof setTimeout>>(0)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(0)
       }) as typeof setTimeout
 
       try {

src/hooks/comment-checker/pending-calls.test.ts

@@ -1,4 +1,5 @@
 import { describe, test, expect } from "bun:test"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("pending-calls cleanup interval", () => {
   test("starts cleanup once and unrefs timer", async () => {
@@ -7,13 +8,13 @@ describe("pending-calls cleanup interval", () => {
     const setIntervalCalls: number[] = []
     let unrefCalled = 0
 
-    globalThis.setInterval = testCoerce<typeof setInterval>(((
+    globalThis.setInterval = unsafeTestValue<typeof setInterval>(((
       _handler: TimerHandler,
       timeout?: number,
       ..._args: unknown[]
     ) => {
       setIntervalCalls.push(timeout as number)
-      return testCoerce<ReturnType<typeof setInterval>>({
+      return unsafeTestValue<ReturnType<typeof setInterval>>({
         unref: () => {
           unrefCalled += 1
         },
@@ -43,16 +44,16 @@ describe("pending-calls cleanup interval", () => {
     let intervalHandle: ReturnType<typeof setInterval> | undefined
     let clearCalls = 0
 
-    globalThis.setInterval = testCoerce<typeof setInterval>(((
+    globalThis.setInterval = unsafeTestValue<typeof setInterval>(((
       _handler: TimerHandler,
       _timeout?: number,
       ..._args: unknown[]
     ) => {
-      intervalHandle = testCoerce<ReturnType<typeof setInterval>>({ unref: () => {} })
+      intervalHandle = unsafeTestValue<ReturnType<typeof setInterval>>({ unref: () => {} })
       return intervalHandle
     }))
 
-    globalThis.clearInterval = testCoerce<typeof clearInterval>(((handle?: ReturnType<typeof setInterval>) => {
+    globalThis.clearInterval = unsafeTestValue<typeof clearInterval>(((handle?: ReturnType<typeof setInterval>) => {
       if (handle === intervalHandle) {
         clearCalls += 1
       }

src/hooks/edit-error-recovery/index.test.ts

@@ -1,11 +1,12 @@
 import { describe, it, expect, beforeEach } from "bun:test"
 import { createEditErrorRecoveryHook, EDIT_ERROR_REMINDER, EDIT_ERROR_PATTERNS } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("createEditErrorRecoveryHook", () => {
   let hook: ReturnType<typeof createEditErrorRecoveryHook>
 
   beforeEach(() => {
-    hook = createEditErrorRecoveryHook(testCoerce({}))
+    hook = createEditErrorRecoveryHook(unsafeTestValue({}))
   })
 
   describe("tool.execute.after", () => {
@@ -108,7 +109,7 @@ describe("createEditErrorRecoveryHook", () => {
           const input = createInput("Edit")
           const output = {
             title: "Edit",
-            output: testCoerce<string>(undefined),
+            output: unsafeTestValue<string>(undefined),
             metadata: {},
           }
 

src/hooks/keyword-detector/hook-ralph-loop.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test, beforeEach, afterEach } from "bun:test"
 import { createKeywordDetectorHook } from "./index"
 import { _resetForTesting, setMainSession } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type StartLoopCall = {
   sessionID: string
@@ -11,7 +12,7 @@ type StartLoopCall = {
 type CancelLoopCall = { sessionID: string }
 
 function createMockPluginInput() {
-  return testCoerce({
+  return unsafeTestValue({
     client: {
       tui: {
         showToast: async () => {},

src/hooks/keyword-detector/hyperplan-ultrawork.test.ts

@@ -4,6 +4,7 @@ import { createKeywordDetectorHook } from "./index"
 import { setMainSession, _resetForTesting } from "../../features/claude-code-session-state"
 import * as sharedModule from "../../shared"
 import * as sessionState from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("keyword-detector hyperplan-ultrawork combo", () => {
   let logSpy: ReturnType<typeof spyOn>
@@ -22,7 +23,7 @@ describe("keyword-detector hyperplan-ultrawork combo", () => {
 
   function createMockPluginInput(options: { toastCalls?: string[] } = {}) {
     const toastCalls = options.toastCalls ?? []
-    return testCoerce<PluginInput>({
+    return unsafeTestValue<PluginInput>({
       client: {
         tui: {
           showToast: async (opts: { body: { title: string } }) => {

src/hooks/keyword-detector/index.test.ts

@@ -7,6 +7,7 @@ import { setMainSession, updateSessionAgent, clearSessionAgent, _resetForTesting
 import { ContextCollector } from "../../features/context-injector"
 import * as sharedModule from "../../shared"
 import * as sessionState from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type ToastOptions = { body: { title: string } }
 
@@ -881,7 +882,7 @@ describe("keyword-detector team mode", () => {
   })
 
   function createMockPluginInput() {
-    return testCoerce<PluginInput>({
+    return unsafeTestValue<PluginInput>({
       client: {
         tui: {
           showToast: async () => {},
@@ -1063,7 +1064,7 @@ describe("keyword-detector disabled_keywords config", () => {
 
   function createMockPluginInput(options: { toastCalls?: string[] } = {}) {
     const toastCalls = options.toastCalls ?? []
-    return testCoerce<PluginInput>({
+    return unsafeTestValue<PluginInput>({
       client: {
         tui: {
           showToast: async (opts: { body: { title: string } }) => {

src/hooks/keyword-detector/ultrawork-edge-trigger.test.ts

@@ -3,6 +3,7 @@ import type { PluginInput } from "@opencode-ai/plugin"
 
 import { createKeywordDetectorHook } from "./index"
 import { _resetForTesting, setMainSession } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type StartLoopCall = {
   sessionID: string
@@ -11,7 +12,7 @@ type StartLoopCall = {
 }
 
 function createMockPluginInput(toastCalls: string[] = []) {
-  return testCoerce<PluginInput>({
+  return unsafeTestValue<PluginInput>({
     client: {
       tui: {
         showToast: async (opts: { body: { title: string } }) => {

src/hooks/keyword-detector/ultrawork-runtime-variant.test.ts

@@ -1,9 +1,10 @@
 import { describe, expect, test } from "bun:test"
 import { createKeywordDetectorHook } from "./index"
 import { _resetForTesting, setMainSession } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createMockPluginInput(toastMessages: string[]) {
-  return testCoerce({
+  return unsafeTestValue({
     client: {
       tui: {
         showToast: async (opts: { body: { message: string } }) => {

src/hooks/model-fallback/hook.test.ts

@@ -1,3 +1,4 @@
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 declare const require: (name: string) => any
 const { beforeEach, describe, expect, mock, test, afterAll } = require("bun:test")
 
@@ -86,7 +87,7 @@ describe("model fallback hook", () => {
   })
 
   test("applies pending fallback on chat.message by overriding model", async () => {
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -122,7 +123,7 @@ describe("model fallback hook", () => {
   })
 
   test("preserves fallback progression across repeated session.error retries", async () => {
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -212,7 +213,7 @@ describe("model fallback hook", () => {
     const sessionID = "ses_model_fallback_noop_skip"
     clearPendingModelFallback(modelFallback, sessionID)
 
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -254,7 +255,7 @@ describe("model fallback hook", () => {
     const sessionID = "ses_model_fallback_noop_variant_skip"
     clearPendingModelFallback(modelFallback, sessionID)
 
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -299,7 +300,7 @@ describe("model fallback hook", () => {
     clearPendingModelFallback(modelFallback, sessionID)
     readConnectedProvidersCacheMock.mockReturnValue(["provider-x"])
 
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -355,7 +356,7 @@ describe("model fallback hook", () => {
 
   test("shows toast when fallback is applied", async () => {
     const toastCalls: Array<{ title: string; message: string }> = []
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -393,7 +394,7 @@ describe("model fallback hook", () => {
     const sessionID = "ses_model_fallback_ghcp"
     clearPendingModelFallback(modelFallback, sessionID)
 
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },
@@ -434,7 +435,7 @@ describe("model fallback hook", () => {
     const sessionID = "ses_model_fallback_google"
     clearPendingModelFallback(modelFallback, sessionID)
 
-    const hook = testCoerce<{
+    const hook = unsafeTestValue<{
       "chat.message"?: (
         input: { sessionID: string },
         output: { message: Record<string, unknown>; parts: Array<{ type: string; text?: string }> },

src/hooks/no-hephaestus-non-gpt/index.test.ts

@@ -4,6 +4,7 @@ import { describe, expect, spyOn, test } from "bun:test"
 import { _resetForTesting, updateSessionAgent } from "../../features/claude-code-session-state"
 import { getAgentDisplayName } from "../../shared/agent-display-names"
 import { createNoHephaestusNonGptHook } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const HEPHAESTUS_DISPLAY = getAgentDisplayName("hephaestus")
 const SISYPHUS_DISPLAY = getAgentDisplayName("sisyphus")
@@ -19,7 +20,7 @@ describe("no-hephaestus-non-gpt hook", () => {
   test("shows toast on every chat.message when hephaestus uses non-gpt model", async () => {
     // given - hephaestus with claude model
     const showToast = spyOn({ fn: async (_input: unknown) => ({}) }, "fn")
-    const hook = createNoHephaestusNonGptHook(testCoerce({
+    const hook = createNoHephaestusNonGptHook(unsafeTestValue({
       client: { tui: { showToast } },
     }))
 
@@ -54,7 +55,7 @@ describe("no-hephaestus-non-gpt hook", () => {
   test("shows warning and does not switch agent when allow_non_gpt_model is enabled", async () => {
     // given - hephaestus with claude model and opt-out enabled
     const showToast = spyOn({ fn: async (_input: unknown) => ({}) }, "fn")
-    const hook = createNoHephaestusNonGptHook(testCoerce({
+    const hook = createNoHephaestusNonGptHook(unsafeTestValue({
       client: { tui: { showToast } },
     }), {
       allowNonGptModel: true,
@@ -83,7 +84,7 @@ describe("no-hephaestus-non-gpt hook", () => {
   test("does not show toast when hephaestus uses gpt model", async () => {
     // given - hephaestus with gpt model
     const showToast = spyOn({ fn: async (_input: unknown) => ({}) }, "fn")
-    const hook = createNoHephaestusNonGptHook(testCoerce({
+    const hook = createNoHephaestusNonGptHook(unsafeTestValue({
       client: { tui: { showToast } },
     }))
 
@@ -104,7 +105,7 @@ describe("no-hephaestus-non-gpt hook", () => {
   test("does not show toast for non-hephaestus agent", async () => {
     // given - sisyphus with claude model (non-gpt)
     const showToast = spyOn({ fn: async (_input: unknown) => ({}) }, "fn")
-    const hook = createNoHephaestusNonGptHook(testCoerce({
+    const hook = createNoHephaestusNonGptHook(unsafeTestValue({
       client: { tui: { showToast } },
     }))
 
@@ -127,7 +128,7 @@ describe("no-hephaestus-non-gpt hook", () => {
     _resetForTesting()
     updateSessionAgent("ses_4", HEPHAESTUS_DISPLAY)
     const showToast = spyOn({ fn: async (_input: unknown) => ({}) }, "fn")
-    const hook = createNoHephaestusNonGptHook(testCoerce({
+    const hook = createNoHephaestusNonGptHook(unsafeTestValue({
       client: { tui: { showToast } },
     }))
 

src/hooks/no-sisyphus-gpt/index.test.ts

@@ -5,6 +5,7 @@ import type { PluginInput } from "@opencode-ai/plugin"
 import { _resetForTesting, updateSessionAgent } from "../../features/claude-code-session-state"
 import { getAgentDisplayName } from "../../shared/agent-display-names"
 import { createNoSisyphusGptHook } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const SISYPHUS_DISPLAY = getAgentDisplayName("sisyphus")
 const HEPHAESTUS_DISPLAY = getAgentDisplayName("hephaestus")
@@ -22,7 +23,7 @@ function createOutput(): HookOutput {
 }
 
 function createHookContext(showToast: (input: unknown) => Promise<unknown>): PluginInput {
-  return testCoerce<PluginInput>({
+  return unsafeTestValue<PluginInput>({
     client: { tui: { showToast } },
   })
 }

src/hooks/question-label-truncator/index.test.ts

@@ -1,3 +1,4 @@
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 import { describe, it, expect } from "bun:test";
 import { createQuestionLabelTruncatorHook } from "./index";
 
@@ -23,10 +24,10 @@ describe("createQuestionLabelTruncatorHook", () => {
       };
 
       // when
-      await hook["tool.execute.before"]?.(testCoerce(input), testCoerce(output));
+      await hook["tool.execute.before"]?.(unsafeTestValue(input), unsafeTestValue(output));
 
       // then
-      const truncatedLabel = (testCoerce(output.args)).questions[0].options[0].label;
+      const truncatedLabel = (unsafeTestValue(output.args)).questions[0].options[0].label;
       expect(truncatedLabel.length).toBeLessThanOrEqual(30);
       expect(truncatedLabel).toBe("This is a very long label t...");
       expect(truncatedLabel.endsWith("...")).toBe(true);
@@ -50,10 +51,10 @@ describe("createQuestionLabelTruncatorHook", () => {
       };
 
       // when
-      await hook["tool.execute.before"]?.(testCoerce(input), testCoerce(output));
+      await hook["tool.execute.before"]?.(unsafeTestValue(input), unsafeTestValue(output));
 
       // then
-      const resultLabel = (testCoerce(output.args)).questions[0].options[0].label;
+      const resultLabel = (unsafeTestValue(output.args)).questions[0].options[0].label;
       expect(resultLabel).toBe(shortLabel);
     });
 
@@ -74,10 +75,10 @@ describe("createQuestionLabelTruncatorHook", () => {
       };
 
       // when
-      await hook["tool.execute.before"]?.(testCoerce(input), testCoerce(output));
+      await hook["tool.execute.before"]?.(unsafeTestValue(input), unsafeTestValue(output));
 
       // then
-      const resultLabel = (testCoerce(output.args)).questions[0].options[0].label;
+      const resultLabel = (unsafeTestValue(output.args)).questions[0].options[0].label;
       expect(resultLabel).toBe(exactLabel);
     });
 
@@ -90,7 +91,7 @@ describe("createQuestionLabelTruncatorHook", () => {
       const originalArgs = { ...output.args };
 
       // when
-      await hook["tool.execute.before"]?.(testCoerce(input), testCoerce(output));
+      await hook["tool.execute.before"]?.(unsafeTestValue(input), unsafeTestValue(output));
 
       // then
       expect(output.args).toEqual(originalArgs);
@@ -120,11 +121,11 @@ describe("createQuestionLabelTruncatorHook", () => {
       };
 
       // when
-      await hook["tool.execute.before"]?.(testCoerce(input), testCoerce(output));
+      await hook["tool.execute.before"]?.(unsafeTestValue(input), unsafeTestValue(output));
 
       // then
-      const q1opts = (testCoerce(output.args)).questions[0].options;
-      const q2opts = (testCoerce(output.args)).questions[1].options;
+      const q1opts = (unsafeTestValue(output.args)).questions[0].options;
+      const q2opts = (unsafeTestValue(output.args)).questions[1].options;
       
       expect(q1opts[0].label).toBe("Very long label number one ...");
       expect(q1opts[0].label.length).toBeLessThanOrEqual(30);

src/hooks/ralph-loop/completion-promise-detector-test-input.test.ts

@@ -1,5 +1,6 @@
 /// <reference types="bun-types" />
 import type { PluginInput } from "@opencode-ai/plugin"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 export type SessionMessage = {
 	info?: { role?: string }
@@ -16,7 +17,7 @@ export function createPluginInput(messages: SessionMessage[]): PluginInput {
 		$: {} as PluginInput["$"],
 	} as PluginInput
 
-	const messagesFunction = testCoerce<PluginInput["client"]["session"]["messages"]>(async () => ({ data: messages }))
+	const messagesFunction = unsafeTestValue<PluginInput["client"]["session"]["messages"]>(async () => ({ data: messages }))
 	pluginInput.client.session.messages = messagesFunction
 
 	return pluginInput

src/hooks/ralph-loop/reset-strategy-race-condition.test.ts

@@ -1,6 +1,7 @@
 /// <reference types="bun-types" />
 import { describe, expect, test } from "bun:test"
 import { createRalphLoopHook } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createDeferred(): {
   promise: Promise<void>
@@ -44,7 +45,7 @@ describe("ralph-loop reset strategy race condition", () => {
     const selectSessionDeferred = createDeferred()
 
     const hook = createRalphLoopHook(
-      testCoerce<Parameters<typeof createRalphLoopHook>[0]>({
+      unsafeTestValue<Parameters<typeof createRalphLoopHook>[0]>({
         directory: process.cwd(),
         client: {
           session: {

src/hooks/ralph-loop/ulw-loop-verification.test.ts

@@ -5,6 +5,7 @@ import { join } from "node:path"
 import { createRalphLoopHook } from "./index"
 import { ULTRAWORK_VERIFICATION_PROMISE } from "./constants"
 import { clearState, writeState } from "./storage"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("ulw-loop verification", () => {
 	const testDir = join(tmpdir(), `ulw-loop-verification-${Date.now()}`)
@@ -15,7 +16,7 @@ describe("ulw-loop verification", () => {
 	let oracleTranscriptPath: string
 
 	function createMockPluginInput() {
-		return testCoerce<Parameters<typeof createRalphLoopHook>[0]>({
+		return unsafeTestValue<Parameters<typeof createRalphLoopHook>[0]>({
 			client: {
 				session: {
 					promptAsync: async (opts: { path: { id: string }; body: { parts: Array<{ type: string; text: string }> } }) => {

src/hooks/runtime-fallback/fallback-models.test.ts

@@ -2,6 +2,7 @@ import { afterEach, describe, expect, test } from "bun:test"
 
 import { getFallbackModelsForSession } from "./fallback-models"
 import { SessionCategoryRegistry } from "../../shared/session-category-registry"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("runtime-fallback fallback-models", () => {
   afterEach(() => {
@@ -12,7 +13,7 @@ describe("runtime-fallback fallback-models", () => {
     //#given
     const sessionID = "ses_runtime_fallback_category"
     SessionCategoryRegistry.register(sessionID, "quick")
-    const pluginConfig = testCoerce({
+    const pluginConfig = unsafeTestValue({
       categories: {
         quick: {
           fallback_models: ["openai/gpt-5.2", "anthropic/claude-opus-4-7"],
@@ -29,7 +30,7 @@ describe("runtime-fallback fallback-models", () => {
 
   test("uses agent-specific fallback_models when agent is resolved", () => {
     //#given
-    const pluginConfig = testCoerce({
+    const pluginConfig = unsafeTestValue({
       agents: {
         oracle: {
           fallback_models: ["openai/gpt-5.2", "anthropic/claude-opus-4-7"],
@@ -46,7 +47,7 @@ describe("runtime-fallback fallback-models", () => {
 
   test("does not fall back to another agent chain when agent cannot be resolved", () => {
     //#given
-    const pluginConfig = testCoerce({
+    const pluginConfig = unsafeTestValue({
       agents: {
         sisyphus: {
           fallback_models: ["quotio/gpt-5.2", "quotio/glm-5", "quotio/kimi-k2.5"],

src/hooks/runtime-fallback/index.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, test, beforeEach, afterEach, mock } from "bun:test"
 import type { RuntimeFallbackConfig, OhMyOpenCodeConfig } from "../../config"
 import * as loggerModule from "../../shared/logger"
 import { SessionCategoryRegistry } from "../../shared/session-category-registry"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type RuntimeFallbackModule = typeof import("./hook")
 
@@ -41,7 +42,7 @@ describe("runtime-fallback", () => {
       abort?: (args: unknown) => Promise<unknown>
     }
   }) {
-    return testCoerce({
+    return unsafeTestValue({
       client: {
         tui: {
           showToast: async (opts: { body: { title: string; message: string; variant: string; duration: number } }) => {

src/hooks/session-notification-sender.test.ts

@@ -2,6 +2,7 @@ import { afterEach, beforeEach, describe, expect, jest, spyOn, test } from "bun:
 import * as sender from "./session-notification-sender"
 import * as utils from "./session-notification-utils"
 import type { PluginInput } from "@opencode-ai/plugin"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 
 
@@ -80,7 +81,7 @@ describe("session-notification-sender", () => {
 		describe("#when calling ctx.$ for notifications", () => {
 			test("#then should call .quiet() on all shell commands to suppress stdout/stderr", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -107,7 +108,7 @@ describe("session-notification-sender", () => {
 				spyOn(utils, "getTerminalNotifierPath").mockResolvedValue(null)
 
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -142,7 +143,7 @@ describe("session-notification-sender", () => {
 				spyOn(utils, "getCmuxPath").mockResolvedValue("/usr/local/bin/cmux")
 
 				const calls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: createShellPromise((cmdStr) => { calls.push(cmdStr) }),
 				})
 
@@ -157,7 +158,7 @@ describe("session-notification-sender", () => {
 			test("#then should fall back to terminal-notifier when cmux fails", async () => {
 				spyOn(utils, "getCmuxPath").mockResolvedValue("/usr/local/bin/cmux")
 
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: createThrowingShellPromise((cmdStr) => cmdStr.includes("cmux notify")),
 				})
 
@@ -180,7 +181,7 @@ describe("session-notification-sender", () => {
 				spyOn(utils, "getCmuxPath").mockResolvedValue("/usr/local/bin/cmux")
 
 				const trackingCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: createThrowingShellPromise((cmdStr) => cmdStr.includes("cmux notify") || cmdStr.includes("terminal-notifier")),
 				})
 
@@ -200,7 +201,7 @@ describe("session-notification-sender", () => {
 
 			test("#then should skip cmux when not available and use terminal-notifier", async () => {
 				const calls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: createShellPromise((cmdStr) => { calls.push(cmdStr) }),
 				})
 
@@ -213,7 +214,7 @@ describe("session-notification-sender", () => {
 
 			test("#then should call .quiet() on linux notify-send", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -246,7 +247,7 @@ describe("session-notification-sender", () => {
 
 			test("#then should call .quiet() on win32 powershell", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -283,7 +284,7 @@ describe("session-notification-sender", () => {
 		describe("#when calling ctx.$ for sound playback", () => {
 			test("#then should call .quiet() on darwin afplay", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -316,7 +317,7 @@ describe("session-notification-sender", () => {
 
 			test("#then should call .quiet() on linux paplay", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -351,7 +352,7 @@ describe("session-notification-sender", () => {
 				spyOn(utils, "getPaplayPath").mockResolvedValue(null)
 
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }
@@ -384,7 +385,7 @@ describe("session-notification-sender", () => {
 
 			test("#then should call .quiet() on win32 powershell sound", async () => {
 				const quietCalls: string[] = []
-				const mockCtx = testCoerce<PluginInput>({
+				const mockCtx = unsafeTestValue<PluginInput>({
 					$: (cmd: TemplateStringsArray, ...values: unknown[]) => {
 						const cmdStr = cmd.reduce((acc, part, i) => acc + part + (values[i] ?? ""), "")
 						const result = { stdout: Buffer.from(""), stderr: Buffer.from(""), exitCode: 0 }

src/hooks/session-recovery/storage/readers-from-sdk.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "bun:test"
+import { unsafeTestValue } from "../../../../test-support/unsafe-test-value"
 async function importFreshReaders() {
   const token = `${Date.now()}-${Math.random()}`
   const [{ readMessagesFromSDK, readMessages }, { readPartsFromSDK, readParts }] = await Promise.all([
@@ -13,7 +14,7 @@ function createMockClient(handlers: {
   messages?: (sessionID: string) => unknown[]
   message?: (sessionID: string, messageID: string) => unknown
 }) {
-  return testCoerce({
+  return unsafeTestValue({
     session: {
       messages: async (opts: { path: { id: string } }) => {
         if (handlers.messages) {

src/hooks/start-work/index.test.ts

@@ -16,6 +16,7 @@ import {
 import type { BoulderState } from "../../features/boulder-state"
 import * as sessionState from "../../features/claude-code-session-state"
 import * as worktreeDetector from "./worktree-detector"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("start-work hook", () => {
   let testDir: string
@@ -738,7 +739,7 @@ You are starting a Sisyphus work session.
       const promptAsyncMock = spyOn({
         promptAsync: async (_request: unknown) => undefined,
       }, "promptAsync")
-      const ctx = testCoerce<Parameters<typeof createAtlasHook>[0]>({
+      const ctx = unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
         directory: testDir,
         client: {
           session: {
@@ -784,18 +785,18 @@ You are starting a Sisyphus work session.
         promptAsync: async (_request: unknown) => undefined,
       }, "promptAsync")
 
-      globalThis.setTimeout = testCoerce<typeof setTimeout>(((callback: Function, delay?: number, ...args: unknown[]) => {
+      globalThis.setTimeout = unsafeTestValue<typeof setTimeout>(((callback: Function, delay?: number, ...args: unknown[]) => {
         const normalized = typeof delay === "number" ? delay : 0
         if (normalized >= 5000) {
           const id = nextTimerId++
           capturedTimers.set(id, { callback: () => callback(...args), cleared: false })
-          return testCoerce<ReturnType<typeof setTimeout>>(id)
+          return unsafeTestValue<ReturnType<typeof setTimeout>>(id)
         }
 
         return originalSetTimeout(callback as Parameters<typeof originalSetTimeout>[0], delay)
       }))
 
-      globalThis.clearTimeout = testCoerce<typeof clearTimeout>(((id?: number | ReturnType<typeof setTimeout>) => {
+      globalThis.clearTimeout = unsafeTestValue<typeof clearTimeout>(((id?: number | ReturnType<typeof setTimeout>) => {
         if (typeof id === "number" && capturedTimers.has(id)) {
           capturedTimers.get(id)!.cleared = true
           capturedTimers.delete(id)
@@ -807,7 +808,7 @@ You are starting a Sisyphus work session.
 
       Date.now = () => fakeNow
 
-      const ctx = testCoerce<Parameters<typeof createAtlasHook>[0]>({
+      const ctx = unsafeTestValue<Parameters<typeof createAtlasHook>[0]>({
         directory: testDir,
         client: {
           session: {
@@ -820,7 +821,7 @@ You are starting a Sisyphus work session.
       const startWorkHook = createStartWorkHook(ctx)
       const atlasHook = createAtlasHook(ctx, {
         directory: testDir,
-        backgroundManager: testCoerce<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"]>({
+        backgroundManager: unsafeTestValue<NonNullable<Parameters<typeof createAtlasHook>[1]>["backgroundManager"]>({
           getTasksByParentSession: () => backgroundRunning ? [{ status: "running" }] : [],
         }),
       })

src/hooks/stop-continuation-guard/index.test.ts

@@ -6,6 +6,7 @@ import type { PluginInput } from "@opencode-ai/plugin"
 import type { BackgroundManager, BackgroundTask } from "../../features/background-agent"
 import { readContinuationMarker } from "../../features/run-continuation-state"
 import { createStopContinuationGuardHook } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type CancelCall = {
   taskId: string
@@ -31,7 +32,7 @@ describe("stop-continuation-guard", () => {
   })
 
   function createMockPluginInput() {
-    return testCoerce<PluginInput>({
+    return unsafeTestValue<PluginInput>({
       client: {
         tui: {
           showToast: async () => ({}),

src/hooks/task-resume-info/index.test.ts

@@ -2,6 +2,7 @@
 
 import { describe, it, expect } from "bun:test"
 import { createTaskResumeInfoHook } from "./index"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("createTaskResumeInfoHook", () => {
   const hook = createTaskResumeInfoHook()
@@ -19,7 +20,7 @@ describe("createTaskResumeInfoHook", () => {
         const input = createInput("task")
         const output = {
           title: "delegate_task",
-          output: testCoerce<string>(undefined),
+          output: unsafeTestValue<string>(undefined),
           metadata: {},
         }
 

src/openclaw/__tests__/config.test.ts

@@ -2,10 +2,11 @@ import { describe, expect, test } from "bun:test"
 import { resolveGateway, validateGatewayUrl, normalizeReplyListenerConfig } from "../config"
 import type { OpenClawConfig } from "../types"
 import { OpenClawConfigSchema } from "../../config/schema/openclaw"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("OpenClaw Config", () => {
   test("resolveGateway resolves HTTP gateway", () => {
-    const config: OpenClawConfig = testCoerce({
+    const config: OpenClawConfig = unsafeTestValue({
       enabled: true,
       gateways: {
         discord: {
@@ -30,7 +31,7 @@ describe("OpenClaw Config", () => {
   })
 
   test("resolveGateway returns null for disabled config", () => {
-    const config: OpenClawConfig = testCoerce({
+    const config: OpenClawConfig = unsafeTestValue({
       enabled: false,
       gateways: {},
       hooks: {},
@@ -39,7 +40,7 @@ describe("OpenClaw Config", () => {
   })
 
   test("resolveGateway returns null for unknown hook", () => {
-    const config: OpenClawConfig = testCoerce({
+    const config: OpenClawConfig = unsafeTestValue({
       enabled: true,
       gateways: {},
       hooks: {},
@@ -48,7 +49,7 @@ describe("OpenClaw Config", () => {
   })
 
   test("resolveGateway returns null for disabled hook", () => {
-    const config: OpenClawConfig = testCoerce({
+    const config: OpenClawConfig = unsafeTestValue({
       enabled: true,
       gateways: { g: { type: "http", url: "https://example.com" } },
       hooks: {

src/openclaw/__tests__/reply-listener-discord.test.ts

@@ -8,6 +8,7 @@ import * as injectionModule from "../reply-listener-injection"
 import * as sessionRegistryModule from "../session-registry"
 import type { ReplyListenerDaemonState } from "../reply-listener-state"
 import type { OpenClawConfig } from "../types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const originalFetch = globalThis.fetch
 
@@ -75,7 +76,7 @@ describe("pollDiscordReplies", () => {
         status: 401,
       }),
     ))
-    globalThis.fetch = testCoerce<typeof fetch>(fetchMock)
+    globalThis.fetch = unsafeTestValue<typeof fetch>(fetchMock)
 
     const state = createState()
 
@@ -109,7 +110,7 @@ describe("pollDiscordReplies", () => {
         ),
       )
       .mockResolvedValueOnce(new Response(null, { status: 204 }))
-    globalThis.fetch = testCoerce<typeof fetch>(fetchMock)
+    globalThis.fetch = unsafeTestValue<typeof fetch>(fetchMock)
     const lookupSpy = spyOn(sessionRegistryModule, "lookupByMessageId").mockReturnValue({
       sessionId: "ses-1",
       tmuxSession: "session-1",

src/plugin-handlers/config-handler.test.ts

@@ -22,6 +22,7 @@ import * as modelResolver from "../shared/model-resolver"
 import * as configErrors from "../shared/config-errors"
 import * as agentPriorityOrder from "./agent-priority-order"
 import * as prometheusAgentConfigBuilder from "./prometheus-agent-config-builder"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 let createConfigHandler: (typeof import("./config-handler"))["createConfigHandler"]
 
@@ -46,36 +47,36 @@ beforeEach(async () => {
   mock.restore()
   configErrors.clearConfigLoadErrors()
 
-  spyOn(agents, testCoerce("createBuiltinAgents")).mockResolvedValue({
+  spyOn(agents, unsafeTestValue("createBuiltinAgents")).mockResolvedValue({
     sisyphus: { name: "sisyphus", prompt: "test", mode: "primary" },
     oracle: { name: "oracle", prompt: "test", mode: "subagent" },
   })
 
-  spyOn(commandLoader, testCoerce("loadUserCommands")).mockResolvedValue({})
-  spyOn(commandLoader, testCoerce("loadProjectCommands")).mockResolvedValue({})
-  spyOn(commandLoader, testCoerce("loadOpencodeGlobalCommands")).mockResolvedValue({})
-  spyOn(commandLoader, testCoerce("loadOpencodeProjectCommands")).mockResolvedValue({})
+  spyOn(commandLoader, unsafeTestValue("loadUserCommands")).mockResolvedValue({})
+  spyOn(commandLoader, unsafeTestValue("loadProjectCommands")).mockResolvedValue({})
+  spyOn(commandLoader, unsafeTestValue("loadOpencodeGlobalCommands")).mockResolvedValue({})
+  spyOn(commandLoader, unsafeTestValue("loadOpencodeProjectCommands")).mockResolvedValue({})
 
-  spyOn(builtinCommands, testCoerce("loadBuiltinCommands")).mockReturnValue({})
+  spyOn(builtinCommands, unsafeTestValue("loadBuiltinCommands")).mockReturnValue({})
 
-  spyOn(skillLoader, testCoerce("loadUserSkills")).mockResolvedValue({})
-  spyOn(skillLoader, testCoerce("loadProjectSkills")).mockResolvedValue({})
-  spyOn(skillLoader, testCoerce("loadOpencodeGlobalSkills")).mockResolvedValue({})
-  spyOn(skillLoader, testCoerce("loadOpencodeProjectSkills")).mockResolvedValue({})
-  spyOn(skillLoader, testCoerce("discoverUserClaudeSkills")).mockResolvedValue([])
-  spyOn(skillLoader, testCoerce("discoverProjectClaudeSkills")).mockResolvedValue([])
-  spyOn(skillLoader, testCoerce("discoverOpencodeGlobalSkills")).mockResolvedValue([])
-  spyOn(skillLoader, testCoerce("discoverOpencodeProjectSkills")).mockResolvedValue([])
+  spyOn(skillLoader, unsafeTestValue("loadUserSkills")).mockResolvedValue({})
+  spyOn(skillLoader, unsafeTestValue("loadProjectSkills")).mockResolvedValue({})
+  spyOn(skillLoader, unsafeTestValue("loadOpencodeGlobalSkills")).mockResolvedValue({})
+  spyOn(skillLoader, unsafeTestValue("loadOpencodeProjectSkills")).mockResolvedValue({})
+  spyOn(skillLoader, unsafeTestValue("discoverUserClaudeSkills")).mockResolvedValue([])
+  spyOn(skillLoader, unsafeTestValue("discoverProjectClaudeSkills")).mockResolvedValue([])
+  spyOn(skillLoader, unsafeTestValue("discoverOpencodeGlobalSkills")).mockResolvedValue([])
+  spyOn(skillLoader, unsafeTestValue("discoverOpencodeProjectSkills")).mockResolvedValue([])
 
-  spyOn(agentLoader, testCoerce("loadUserAgents")).mockReturnValue({})
-  spyOn(agentLoader, testCoerce("loadProjectAgents")).mockReturnValue({})
-  spyOn(agentLoader, testCoerce("loadOpencodeGlobalAgents")).mockReturnValue({})
-  spyOn(agentLoader, testCoerce("loadOpencodeProjectAgents")).mockReturnValue({})
+  spyOn(agentLoader, unsafeTestValue("loadUserAgents")).mockReturnValue({})
+  spyOn(agentLoader, unsafeTestValue("loadProjectAgents")).mockReturnValue({})
+  spyOn(agentLoader, unsafeTestValue("loadOpencodeGlobalAgents")).mockReturnValue({})
+  spyOn(agentLoader, unsafeTestValue("loadOpencodeProjectAgents")).mockReturnValue({})
 
-  spyOn(mcpLoader, testCoerce("loadMcpConfigs")).mockResolvedValue({ servers: {} })
+  spyOn(mcpLoader, unsafeTestValue("loadMcpConfigs")).mockResolvedValue({ servers: {}, loadedServers: [] })
   setAdditionalAllowedMcpEnvVarsSpy = spyOn(mcpLoader, "setAdditionalAllowedMcpEnvVars").mockImplementation(() => {})
 
-  spyOn(pluginLoader, testCoerce("loadAllPluginComponents")).mockResolvedValue({
+  spyOn(pluginLoader, unsafeTestValue("loadAllPluginComponents")).mockResolvedValue({
     commands: {},
     skills: {},
     agents: {},
@@ -85,54 +86,57 @@ beforeEach(async () => {
     errors: [],
   })
 
-  spyOn(mcpModule, testCoerce("createBuiltinMcps")).mockReturnValue({})
+  spyOn(mcpModule, unsafeTestValue("createBuiltinMcps")).mockReturnValue({})
 
-  spyOn(shared, testCoerce("log")).mockImplementation(() => {})
-  spyOn(shared, testCoerce("fetchAvailableModels")).mockResolvedValue(new Set(["anthropic/claude-opus-4-7"]))
-  spyOn(shared, testCoerce("readConnectedProvidersCache")).mockReturnValue(null)
+  spyOn(shared, unsafeTestValue("log")).mockImplementation(() => {})
+  spyOn(shared, unsafeTestValue("fetchAvailableModels")).mockResolvedValue(new Set(["anthropic/claude-opus-4-7"]))
+  spyOn(shared, unsafeTestValue("readConnectedProvidersCache")).mockReturnValue(null)
 
-  spyOn(configDir, testCoerce("getOpenCodeConfigPaths")).mockReturnValue({
-    global: "/tmp/.config/opencode",
-    project: "/tmp/.opencode",
+  spyOn(configDir, unsafeTestValue("getOpenCodeConfigPaths")).mockReturnValue({
+    configDir: "/tmp/.config/opencode",
+    configJson: "/tmp/.config/opencode/opencode.json",
+    configJsonc: "/tmp/.config/opencode/opencode.jsonc",
+    packageJson: "/tmp/.config/opencode/package.json",
+    omoConfig: "/tmp/.config/opencode/oh-my-opencode.jsonc",
   })
 
-  spyOn(permissionCompat, testCoerce("migrateAgentConfig")).mockImplementation((config: Record<string, unknown>) => config)
+  spyOn(permissionCompat, unsafeTestValue("migrateAgentConfig")).mockImplementation((config: Record<string, unknown>) => config)
 
-  spyOn(modelResolver, testCoerce("resolveModelWithFallback")).mockReturnValue({ model: "anthropic/claude-opus-4-7" })
+  spyOn(modelResolver, unsafeTestValue("resolveModelWithFallback")).mockReturnValue({ model: "anthropic/claude-opus-4-7", source: "provider-fallback" })
   ;({ createConfigHandler } = await importFreshConfigHandlerModule())
 })
 
 afterEach(() => {
-  (testCoerce(agents.createBuiltinAgents))?.mockRestore?.()
-  ;(testCoerce(sisyphusJunior.createSisyphusJuniorAgentWithOverrides))?.mockRestore?.()
-  ;(testCoerce(commandLoader.loadUserCommands))?.mockRestore?.()
-  ;(testCoerce(commandLoader.loadProjectCommands))?.mockRestore?.()
-  ;(testCoerce(commandLoader.loadOpencodeGlobalCommands))?.mockRestore?.()
-  ;(testCoerce(commandLoader.loadOpencodeProjectCommands))?.mockRestore?.()
-  ;(testCoerce(builtinCommands.loadBuiltinCommands))?.mockRestore?.()
-  ;(testCoerce(skillLoader.loadUserSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.loadProjectSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.loadOpencodeGlobalSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.loadOpencodeProjectSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.discoverUserClaudeSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.discoverProjectClaudeSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.discoverOpencodeGlobalSkills))?.mockRestore?.()
-  ;(testCoerce(skillLoader.discoverOpencodeProjectSkills))?.mockRestore?.()
-  ;(testCoerce(agentLoader.loadUserAgents))?.mockRestore?.()
-  ;(testCoerce(agentLoader.loadProjectAgents))?.mockRestore?.()
-  ;(testCoerce(agentLoader.loadOpencodeGlobalAgents))?.mockRestore?.()
-  ;(testCoerce(agentLoader.loadOpencodeProjectAgents))?.mockRestore?.()
-  ;(testCoerce(mcpLoader.loadMcpConfigs))?.mockRestore?.()
+  (unsafeTestValue(agents.createBuiltinAgents))?.mockRestore?.()
+  ;(unsafeTestValue(sisyphusJunior.createSisyphusJuniorAgentWithOverrides))?.mockRestore?.()
+  ;(unsafeTestValue(commandLoader.loadUserCommands))?.mockRestore?.()
+  ;(unsafeTestValue(commandLoader.loadProjectCommands))?.mockRestore?.()
+  ;(unsafeTestValue(commandLoader.loadOpencodeGlobalCommands))?.mockRestore?.()
+  ;(unsafeTestValue(commandLoader.loadOpencodeProjectCommands))?.mockRestore?.()
+  ;(unsafeTestValue(builtinCommands.loadBuiltinCommands))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.loadUserSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.loadProjectSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.loadOpencodeGlobalSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.loadOpencodeProjectSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.discoverUserClaudeSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.discoverProjectClaudeSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.discoverOpencodeGlobalSkills))?.mockRestore?.()
+  ;(unsafeTestValue(skillLoader.discoverOpencodeProjectSkills))?.mockRestore?.()
+  ;(unsafeTestValue(agentLoader.loadUserAgents))?.mockRestore?.()
+  ;(unsafeTestValue(agentLoader.loadProjectAgents))?.mockRestore?.()
+  ;(unsafeTestValue(agentLoader.loadOpencodeGlobalAgents))?.mockRestore?.()
+  ;(unsafeTestValue(agentLoader.loadOpencodeProjectAgents))?.mockRestore?.()
+  ;(unsafeTestValue(mcpLoader.loadMcpConfigs))?.mockRestore?.()
   setAdditionalAllowedMcpEnvVarsSpy?.mockRestore()
-  ;(testCoerce(pluginLoader.loadAllPluginComponents))?.mockRestore?.()
-  ;(testCoerce(mcpModule.createBuiltinMcps))?.mockRestore?.()
-  ;(testCoerce(shared.log))?.mockRestore?.()
-  ;(testCoerce(shared.fetchAvailableModels))?.mockRestore?.()
-  ;(testCoerce(shared.readConnectedProvidersCache))?.mockRestore?.()
-  ;(testCoerce(configDir.getOpenCodeConfigPaths))?.mockRestore?.()
-  ;(testCoerce(permissionCompat.migrateAgentConfig))?.mockRestore?.()
-  ;(testCoerce(modelResolver.resolveModelWithFallback))?.mockRestore?.()
-  ;(testCoerce(agentPriorityOrder.reorderAgentsByPriority))?.mockRestore?.()
+  ;(unsafeTestValue(pluginLoader.loadAllPluginComponents))?.mockRestore?.()
+  ;(unsafeTestValue(mcpModule.createBuiltinMcps))?.mockRestore?.()
+  ;(unsafeTestValue(shared.log))?.mockRestore?.()
+  ;(unsafeTestValue(shared.fetchAvailableModels))?.mockRestore?.()
+  ;(unsafeTestValue(shared.readConnectedProvidersCache))?.mockRestore?.()
+  ;(unsafeTestValue(configDir.getOpenCodeConfigPaths))?.mockRestore?.()
+  ;(unsafeTestValue(permissionCompat.migrateAgentConfig))?.mockRestore?.()
+  ;(unsafeTestValue(modelResolver.resolveModelWithFallback))?.mockRestore?.()
+  ;(unsafeTestValue(agentPriorityOrder.reorderAgentsByPriority))?.mockRestore?.()
   configErrors.clearConfigLoadErrors()
   mock.restore()
 })
@@ -230,7 +234,7 @@ describe("MCP env allowlist initialization", () => {
 describe("Plan agent demote behavior", () => {
   test("orders core agents as sisyphus -> hephaestus -> prometheus -> atlas", async () => {
     // #given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -275,7 +279,7 @@ describe("Plan agent demote behavior", () => {
 
   test("assembles core agents first before priority reorder runs", async () => {
     // #given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -285,7 +289,7 @@ describe("Plan agent demote behavior", () => {
       oracle: { name: "oracle", prompt: "test", mode: "subagent" },
       atlas: { name: "atlas", prompt: "test", mode: "primary" },
     })
-    const reorderSpy = testCoerce(spyOn(agentPriorityOrder, "reorderAgentsByPriority"))
+    const reorderSpy = unsafeTestValue(spyOn(agentPriorityOrder, "reorderAgentsByPriority"))
     const pluginConfig = createPluginConfig({
       sisyphus_agent: {
         planner_enabled: true,
@@ -321,7 +325,7 @@ describe("Plan agent demote behavior", () => {
 
   test("backfills runtime core agent names when builtin configs omit name", async () => {
     // #given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
     }>(agents.createBuiltinAgents)
     createBuiltinAgentsMock.mockResolvedValue({
@@ -485,7 +489,7 @@ describe("Plan agent demote behavior", () => {
 describe("Agent permission defaults", () => {
   test("hephaestus should allow task", async () => {
     // #given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
     }>(agents.createBuiltinAgents)
     createBuiltinAgentsMock.mockResolvedValue({
@@ -1054,7 +1058,7 @@ describe("Plan agent model inheritance from prometheus", () => {
 
   test("plan agent inherits temperature, reasoningEffort, and other model settings from prometheus", async () => {
     //#given - prometheus configured with category that has temperature and reasoningEffort
-    spyOn(shared, testCoerce("resolveModelPipeline")).mockReturnValue({
+    spyOn(shared, unsafeTestValue("resolveModelPipeline")).mockReturnValue({
       model: "openai/gpt-5.4",
       provenance: "override",
       variant: "high",
@@ -1109,7 +1113,7 @@ describe("Plan agent model inheritance from prometheus", () => {
 
   test("plan agent user override takes priority over prometheus inherited settings", async () => {
     //#given - prometheus resolves to opus, but user has plan override for gpt-5.4
-    spyOn(shared, testCoerce("resolveModelPipeline")).mockReturnValue({
+    spyOn(shared, unsafeTestValue("resolveModelPipeline")).mockReturnValue({
       model: "anthropic/claude-opus-4-7",
       provenance: "provider-fallback",
       variant: "max",
@@ -1152,7 +1156,7 @@ describe("Plan agent model inheritance from prometheus", () => {
 
   test("plan agent does NOT inherit prompt, description, or color from prometheus", async () => {
     //#given
-    spyOn(shared, testCoerce("resolveModelPipeline")).mockReturnValue({
+    spyOn(shared, unsafeTestValue("resolveModelPipeline")).mockReturnValue({
       model: "anthropic/claude-opus-4-7",
       provenance: "provider-fallback",
       variant: "max",
@@ -1229,8 +1233,10 @@ describe("Deadlock prevention - fetchAvailableModels must not receive client", (
 describe("config-handler plugin loading error boundary (#1559)", () => {
   test("returns empty defaults when loadAllPluginComponents throws", async () => {
     //#given
-    ;(testCoerce(pluginLoader.loadAllPluginComponents)).mockRestore?.()
-    spyOn(pluginLoader, testCoerce("loadAllPluginComponents")).mockRejectedValue(new Error("crash"))
+    ;(unsafeTestValue(pluginLoader.loadAllPluginComponents)).mockRestore?.()
+    spyOn(pluginLoader, unsafeTestValue("loadAllPluginComponents")).mockImplementation(async () => {
+      throw new Error("crash")
+    })
     const pluginConfig = createPluginConfig({})
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
@@ -1255,8 +1261,8 @@ describe("config-handler plugin loading error boundary (#1559)", () => {
 
   test("returns empty defaults when loadAllPluginComponents times out", async () => {
     //#given
-    ;(testCoerce(pluginLoader.loadAllPluginComponents)).mockRestore?.()
-    spyOn(pluginLoader, testCoerce("loadAllPluginComponents")).mockImplementation(
+    ;(unsafeTestValue(pluginLoader.loadAllPluginComponents)).mockRestore?.()
+    spyOn(pluginLoader, unsafeTestValue("loadAllPluginComponents")).mockImplementation(
       () => new Promise(() => {})
     )
     const pluginConfig = createPluginConfig({
@@ -1285,8 +1291,10 @@ describe("config-handler plugin loading error boundary (#1559)", () => {
 
   test("records a config load error when loadAllPluginComponents fails", async () => {
     //#given
-    ;(testCoerce(pluginLoader.loadAllPluginComponents)).mockRestore?.()
-    spyOn(pluginLoader, testCoerce("loadAllPluginComponents")).mockRejectedValue(new Error("crash"))
+    ;(unsafeTestValue(pluginLoader.loadAllPluginComponents)).mockRestore?.()
+    spyOn(pluginLoader, unsafeTestValue("loadAllPluginComponents")).mockImplementation(async () => {
+      throw new Error("crash")
+    })
     const pluginConfig = createPluginConfig({})
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
@@ -1314,14 +1322,14 @@ describe("config-handler plugin loading error boundary (#1559)", () => {
 
   test("passes through plugin data on successful load (identity test)", async () => {
     //#given
-    ;(testCoerce(pluginLoader.loadAllPluginComponents)).mockRestore?.()
-    spyOn(pluginLoader, testCoerce("loadAllPluginComponents")).mockResolvedValue({
-      commands: { "test-cmd": { description: "test", template: "test" } },
+    ;(unsafeTestValue(pluginLoader.loadAllPluginComponents)).mockRestore?.()
+    spyOn(pluginLoader, unsafeTestValue("loadAllPluginComponents")).mockResolvedValue({
+      commands: { "test-cmd": { name: "test-cmd", description: "test", template: "test" } },
       skills: {},
       agents: {},
       mcpServers: {},
       hooksConfigs: [],
-      plugins: [{ name: "test-plugin", version: "1.0.0" }],
+      plugins: [{ name: "test-plugin", version: "1.0.0", scope: "project", installPath: "/tmp/test-plugin", pluginKey: "test-plugin" }],
       errors: [],
     })
     const pluginConfig = createPluginConfig({})
@@ -1351,14 +1359,14 @@ describe("config-handler plugin loading error boundary (#1559)", () => {
 describe("command agent routing coherence", () => {
   test("keeps start-work aligned with the exported Atlas list key opencode matches exactly", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
     }>(agents.createBuiltinAgents)
     createBuiltinAgentsMock.mockResolvedValue({
       sisyphus: { name: "sisyphus", prompt: "test", mode: "primary" },
       atlas: { name: "atlas", prompt: "test", mode: "primary" },
     })
-    ;(testCoerce<{
+    ;(unsafeTestValue<{
       mockReturnValue: (value: Record<string, unknown>) => void
     }>(builtinCommands.loadBuiltinCommands)).mockReturnValue({
       "start-work": {
@@ -1404,7 +1412,7 @@ describe("per-agent todowrite/todoread deny when task_system enabled", () => {
 
   test("denies todowrite and todoread for primary agents when task_system is enabled", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
     }>(agents.createBuiltinAgents)
     createBuiltinAgentsMock.mockResolvedValue({
@@ -1445,7 +1453,7 @@ describe("per-agent todowrite/todoread deny when task_system enabled", () => {
 
   test("does not deny todowrite/todoread when task_system is disabled", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -1487,7 +1495,7 @@ describe("per-agent todowrite/todoread deny when task_system enabled", () => {
 
   test("does not deny todowrite/todoread when task_system is undefined", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -1526,7 +1534,7 @@ describe("per-agent todowrite/todoread deny when task_system enabled", () => {
 describe("disable_omo_env pass-through", () => {
   test("passes disable_omo_env=true to createBuiltinAgents", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -1563,7 +1571,7 @@ describe("disable_omo_env pass-through", () => {
 
   test("passes disable_omo_env=false to createBuiltinAgents when omitted", async () => {
     //#given
-    const createBuiltinAgentsMock = testCoerce<{
+    const createBuiltinAgentsMock = unsafeTestValue<{
       mockResolvedValue: (value: Record<string, unknown>) => void
       mock: { calls: unknown[][] }
     }>(agents.createBuiltinAgents)
@@ -1600,14 +1608,14 @@ describe("disable_omo_env pass-through", () => {
 describe("Agent merge priority — project-local overrides global", () => {
   test("project-local Claude agent overrides global Claude agent with same name", async () => {
     // #given — same agent name in both global (user) and project scopes
-    ;(testCoerce(agentLoader.loadUserAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadUserAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(user) global version",
         mode: "subagent",
         prompt: "I am the global agent",
       },
     })
-    ;(testCoerce(agentLoader.loadProjectAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadProjectAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(project) project version",
         mode: "subagent",
@@ -1615,7 +1623,7 @@ describe("Agent merge priority — project-local overrides global", () => {
       },
     })
 
-    const pluginConfig: OhMyOpenCodeConfig = {}
+    const pluginConfig = createPluginConfig()
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
       agent: {},
@@ -1640,14 +1648,14 @@ describe("Agent merge priority — project-local overrides global", () => {
 
   test("opencode project agent overrides opencode global agent with same name", async () => {
     // #given — same agent name in opencode global vs opencode project
-    ;(testCoerce(agentLoader.loadOpencodeGlobalAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadOpencodeGlobalAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(opencode) global version",
         mode: "subagent",
         prompt: "I am the opencode global agent",
       },
     })
-    ;(testCoerce(agentLoader.loadOpencodeProjectAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadOpencodeProjectAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(opencode-project) project version",
         mode: "subagent",
@@ -1655,7 +1663,7 @@ describe("Agent merge priority — project-local overrides global", () => {
       },
     })
 
-    const pluginConfig: OhMyOpenCodeConfig = {}
+    const pluginConfig = createPluginConfig()
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
       agent: {},
@@ -1680,14 +1688,14 @@ describe("Agent merge priority — project-local overrides global", () => {
 
   test("project Claude agent overrides opencode global agent with same name", async () => {
     // #given — project-scope Claude agent vs global-scope opencode agent
-    ;(testCoerce(agentLoader.loadOpencodeGlobalAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadOpencodeGlobalAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(opencode) global version",
         mode: "subagent",
         prompt: "I am the opencode global agent",
       },
     })
-    ;(testCoerce(agentLoader.loadProjectAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadProjectAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(project) project version",
         mode: "subagent",
@@ -1695,7 +1703,7 @@ describe("Agent merge priority — project-local overrides global", () => {
       },
     })
 
-    const pluginConfig: OhMyOpenCodeConfig = {}
+    const pluginConfig = createPluginConfig()
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
       agent: {},
@@ -1720,7 +1728,7 @@ describe("Agent merge priority — project-local overrides global", () => {
 
   test("plugin agents have lowest priority — overridden by all other sources", async () => {
     // #given — same agent in plugin, global, and project scopes
-    ;(testCoerce(pluginLoader.loadAllPluginComponents)).mockResolvedValue({
+    ;(unsafeTestValue(pluginLoader.loadAllPluginComponents)).mockResolvedValue({
       commands: {},
       skills: {},
       agents: {
@@ -1735,7 +1743,7 @@ describe("Agent merge priority — project-local overrides global", () => {
       plugins: [],
       errors: [],
     })
-    ;(testCoerce(agentLoader.loadUserAgents)).mockReturnValue({
+    ;(unsafeTestValue(agentLoader.loadUserAgents)).mockReturnValue({
       "my-custom-agent": {
         description: "(user) global version",
         mode: "subagent",
@@ -1743,7 +1751,7 @@ describe("Agent merge priority — project-local overrides global", () => {
       },
     })
 
-    const pluginConfig: OhMyOpenCodeConfig = {}
+    const pluginConfig = createPluginConfig()
     const config: Record<string, unknown> = {
       model: "anthropic/claude-opus-4-7",
       agent: {},

src/plugin-handlers/mcp-config-handler.test.ts

@@ -6,22 +6,23 @@ import type { OhMyOpenCodeConfig } from "../config"
 import * as mcpLoader from "../features/claude-code-mcp-loader"
 import * as mcpModule from "../mcp"
 import * as shared from "../shared"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 let loadMcpConfigsSpy: ReturnType<typeof spyOn>
 let createBuiltinMcpsSpy: ReturnType<typeof spyOn>
 
 beforeEach(() => {
-  loadMcpConfigsSpy = spyOn(mcpLoader, testCoerce("loadMcpConfigs")).mockResolvedValue({
+  loadMcpConfigsSpy = spyOn(mcpLoader, unsafeTestValue("loadMcpConfigs")).mockResolvedValue({
     servers: {},
   })
-  createBuiltinMcpsSpy = spyOn(mcpModule, testCoerce("createBuiltinMcps")).mockReturnValue({})
-  spyOn(shared, testCoerce("log")).mockImplementation(() => {})
+  createBuiltinMcpsSpy = spyOn(mcpModule, unsafeTestValue("createBuiltinMcps")).mockReturnValue({})
+  spyOn(shared, unsafeTestValue("log")).mockImplementation(() => {})
 })
 
 afterEach(() => {
   loadMcpConfigsSpy.mockRestore()
   createBuiltinMcpsSpy.mockRestore()
-  ;(testCoerce(shared.log))?.mockRestore?.()
+  ;(unsafeTestValue(shared.log))?.mockRestore?.()
 })
 
 function createPluginConfig(overrides: Partial<OhMyOpenCodeConfig> = {}): OhMyOpenCodeConfig {
@@ -82,7 +83,7 @@ describe("applyMcpConfig", () => {
     })
 
     const config: Record<string, unknown> = { mcp: {} }
-    const pluginConfig = createPluginConfig({ disabled_mcps: testCoerce(["playwright"]) })
+    const pluginConfig = createPluginConfig({ disabled_mcps: unsafeTestValue(["playwright"]) })
 
     //#when
     const { applyMcpConfig } = await import("./mcp-config-handler")
@@ -107,7 +108,7 @@ describe("applyMcpConfig", () => {
   test("passes disabled_mcps to loadMcpConfigs", async () => {
     //#given
     const config: Record<string, unknown> = { mcp: {} }
-    const pluginConfig = createPluginConfig({ disabled_mcps: testCoerce(["firecrawl", "exa"]) })
+    const pluginConfig = createPluginConfig({ disabled_mcps: unsafeTestValue(["firecrawl", "exa"]) })
 
     //#when
     const { applyMcpConfig } = await import("./mcp-config-handler")
@@ -145,7 +146,7 @@ describe("applyMcpConfig", () => {
   test("deletes plugin MCPs that are in disabled_mcps", async () => {
     //#given
     const config: Record<string, unknown> = { mcp: {} }
-    const pluginConfig = createPluginConfig({ disabled_mcps: testCoerce(["plugin:custom"]) })
+    const pluginConfig = createPluginConfig({ disabled_mcps: unsafeTestValue(["plugin:custom"]) })
 
     //#when
     const { applyMcpConfig } = await import("./mcp-config-handler")

src/plugin/chat-message.test.ts

@@ -13,6 +13,7 @@ import { _resetForTesting, setMainSession, subagentSessions, registerAgentName,
 import { getAgentListDisplayName } from "../shared/agent-display-names"
 import { getOmoOpenCodeCacheDir, getOpenCodeCacheDir } from "../shared/data-path"
 import { clearSessionModel, getSessionModel, setSessionModel } from "../shared/session-model-state"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 type ChatMessagePart = { type: string; text?: string; [key: string]: unknown }
 type ChatMessageHandlerOutput = { message: Record<string, unknown>; parts: ChatMessagePart[] }
@@ -56,13 +57,13 @@ function createMockHandlerArgs(overrides?: {
 }) {
   const appliedSessions: string[] = []
   return {
-    ctx: testCoerce({ client: { tui: { showToast: async () => {} } } }),
-    pluginConfig: testCoerce((overrides?.pluginConfig ?? {})),
+    ctx: unsafeTestValue({ client: { tui: { showToast: async () => {} } } }),
+    pluginConfig: unsafeTestValue((overrides?.pluginConfig ?? {})),
     firstMessageVariantGate: {
       shouldOverride: () => overrides?.shouldOverride ?? false,
       markApplied: (sessionID: string) => { appliedSessions.push(sessionID) },
     },
-    hooks: testCoerce({
+    hooks: unsafeTestValue({
       stopContinuationGuard: null,
       backgroundNotificationHook: null,
       keywordDetector: null,

src/plugin/event.model-fallback-2941.test.ts

@@ -6,6 +6,7 @@ import { createChatMessageHandler } from "./chat-message"
 import { _resetForTesting, setSessionAgent } from "../features/claude-code-session-state"
 import { clearPendingModelFallback, createModelFallbackHook, setSessionFallbackChain } from "../hooks/model-fallback/hook"
 import * as connectedProvidersCache from "../shared/connected-providers-cache"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 type EventInput = { event: { type: string; properties?: unknown } }
 type EventHandlerArgs = Parameters<typeof createEventHandler>[0]
@@ -13,27 +14,27 @@ type EventHandlerInput = Parameters<ReturnType<typeof createEventHandler>>[0]
 type ChatMessageHandlerArgs = Parameters<typeof createChatMessageHandler>[0]
 
 function asEventHandlerInput(input: EventInput): EventHandlerInput {
-	return testCoerce<EventHandlerInput>(input)
+	return unsafeTestValue<EventHandlerInput>(input)
 }
 
 function asEventHandlerContext(ctx: unknown): EventHandlerArgs["ctx"] {
-	return testCoerce<EventHandlerArgs["ctx"]>(ctx)
+	return unsafeTestValue<EventHandlerArgs["ctx"]>(ctx)
 }
 
 function asPluginConfig(config: unknown): EventHandlerArgs["pluginConfig"] {
-	return testCoerce<EventHandlerArgs["pluginConfig"]>(config)
+	return unsafeTestValue<EventHandlerArgs["pluginConfig"]>(config)
 }
 
 function asChatMessageHandlerContext(ctx: unknown): ChatMessageHandlerArgs["ctx"] {
-	return testCoerce<ChatMessageHandlerArgs["ctx"]>(ctx)
+	return unsafeTestValue<ChatMessageHandlerArgs["ctx"]>(ctx)
 }
 
 function asChatPluginConfig(config: unknown): ChatMessageHandlerArgs["pluginConfig"] {
-	return testCoerce<ChatMessageHandlerArgs["pluginConfig"]>(config)
+	return unsafeTestValue<ChatMessageHandlerArgs["pluginConfig"]>(config)
 }
 
 function createEventHandlerManagers(): EventHandlerArgs["managers"] {
-	return testCoerce<EventHandlerArgs["managers"]>({
+	return unsafeTestValue<EventHandlerArgs["managers"]>({
 		tmuxSessionManager: {
 			onSessionCreated: async () => {},
 			onSessionDeleted: async () => {},
@@ -45,13 +46,13 @@ function createEventHandlerManagers(): EventHandlerArgs["managers"] {
 }
 
 function createEventHandlerHooks(modelFallback: ReturnType<typeof createModelFallbackHook>): EventHandlerArgs["hooks"] {
-	return testCoerce<EventHandlerArgs["hooks"]>({
+	return unsafeTestValue<EventHandlerArgs["hooks"]>({
 		modelFallback,
 	})
 }
 
 function createChatMessageHandlerHooks(modelFallback: ReturnType<typeof createModelFallbackHook>): ChatMessageHandlerArgs["hooks"] {
-	return testCoerce<ChatMessageHandlerArgs["hooks"]>({
+	return unsafeTestValue<ChatMessageHandlerArgs["hooks"]>({
 		modelFallback,
 		stopContinuationGuard: null,
 		keywordDetector: null,

src/plugin/event.model-fallback-pin-agent.test.ts

@@ -5,6 +5,7 @@ import { createEventHandler } from "./event"
 import { _resetForTesting, setMainSession } from "../features/claude-code-session-state"
 import { createModelFallbackHook, clearPendingModelFallback } from "../hooks/model-fallback/hook"
 import * as connectedProvidersCache from "../shared/connected-providers-cache"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 let readConnectedProvidersCacheSpy: { mockRestore: () => void } | undefined
 let readProviderModelsCacheSpy: { mockRestore: () => void } | undefined
@@ -50,16 +51,16 @@ describe("createEventHandler - model-fallback auto-continuation pins agent/model
     }
 
     const handler = createEventHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         directory: "/tmp",
         client: { session: sessionClient },
       }),
-      pluginConfig: testCoerce((args?.pluginConfig ?? {})),
+      pluginConfig: unsafeTestValue((args?.pluginConfig ?? {})),
       firstMessageVariantGate: {
         markSessionCreated: () => {},
         clear: () => {},
       },
-      managers: testCoerce({
+      managers: unsafeTestValue({
         tmuxSessionManager: {
           onSessionCreated: async () => {},
           onSessionDeleted: async () => {},
@@ -68,7 +69,7 @@ describe("createEventHandler - model-fallback auto-continuation pins agent/model
           disconnectSession: async () => {},
         },
       }),
-      hooks: args?.hooks ?? (testCoerce({})),
+      hooks: args?.hooks ?? (unsafeTestValue({})),
     })
 
     return { handler, promptAsyncBodies, promptBodies }

src/plugin/event.model-fallback.test.ts

@@ -6,6 +6,7 @@ import { createChatMessageHandler } from "./chat-message"
 import { _resetForTesting, setMainSession } from "../features/claude-code-session-state"
 import { createModelFallbackHook, clearPendingModelFallback } from "../hooks/model-fallback/hook"
 import * as connectedProvidersCache from "../shared/connected-providers-cache"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 let readConnectedProvidersCacheSpy: { mockRestore: () => void } | undefined
 let readProviderModelsCacheSpy: { mockRestore: () => void } | undefined
@@ -22,7 +23,7 @@ describe("createEventHandler - model fallback", () => {
     const promptCalls: string[] = []
 
     const handler = createEventHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         directory: "/tmp",
         client: {
           session: {
@@ -37,12 +38,12 @@ describe("createEventHandler - model fallback", () => {
           },
         },
       }),
-      pluginConfig: testCoerce((args?.pluginConfig ?? {})),
+      pluginConfig: unsafeTestValue((args?.pluginConfig ?? {})),
       firstMessageVariantGate: {
         markSessionCreated: () => {},
         clear: () => {},
       },
-      managers: testCoerce({
+      managers: unsafeTestValue({
         tmuxSessionManager: {
           onSessionCreated: async () => {},
           onSessionDeleted: async () => {},
@@ -51,7 +52,7 @@ describe("createEventHandler - model fallback", () => {
           disconnectSession: async () => {},
         },
       }),
-      hooks: args?.hooks ?? (testCoerce({})),
+      hooks: args?.hooks ?? (unsafeTestValue({})),
     })
 
     return { handler, abortCalls, promptCalls }
@@ -148,19 +149,19 @@ describe("createEventHandler - model fallback", () => {
     const { handler, abortCalls, promptCalls } = createHandler({ hooks: { modelFallback } })
 
     const chatMessageHandler = createChatMessageHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         client: {
           tui: {
             showToast: async () => ({}),
           },
         },
       }),
-      pluginConfig: testCoerce({}),
+      pluginConfig: unsafeTestValue({}),
       firstMessageVariantGate: {
         shouldOverride: () => false,
         markApplied: () => {},
       },
-      hooks: testCoerce({
+      hooks: unsafeTestValue({
         modelFallback,
         stopContinuationGuard: null,
         keywordDetector: null,
@@ -358,19 +359,19 @@ describe("createEventHandler - model fallback", () => {
     const { handler, abortCalls, promptCalls } = createHandler({ hooks: { modelFallback }, pluginConfig })
 
     const chatMessageHandler = createChatMessageHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         client: {
           tui: {
             showToast: async () => ({}),
           },
         },
       }),
-      pluginConfig: testCoerce({}),
+      pluginConfig: unsafeTestValue({}),
       firstMessageVariantGate: {
         shouldOverride: () => false,
         markApplied: () => {},
       },
-      hooks: testCoerce({
+      hooks: unsafeTestValue({
         modelFallback,
         stopContinuationGuard: null,
         keywordDetector: null,
@@ -449,7 +450,7 @@ describe("createEventHandler - model fallback", () => {
 
     setupConnectedProviderCacheMocks()
     const eventHandler = createEventHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         directory: "/tmp",
         client: {
           session: {
@@ -464,12 +465,12 @@ describe("createEventHandler - model fallback", () => {
           },
         },
       }),
-      pluginConfig: testCoerce({}),
+      pluginConfig: unsafeTestValue({}),
       firstMessageVariantGate: {
         markSessionCreated: () => {},
         clear: () => {},
       },
-      managers: testCoerce({
+      managers: unsafeTestValue({
         tmuxSessionManager: {
           onSessionCreated: async () => {},
           onSessionDeleted: async () => {},
@@ -478,13 +479,13 @@ describe("createEventHandler - model fallback", () => {
           disconnectSession: async () => {},
         },
       }),
-      hooks: testCoerce({
+      hooks: unsafeTestValue({
         modelFallback,
       }),
     })
 
     const chatMessageHandler = createChatMessageHandler({
-      ctx: testCoerce({
+      ctx: unsafeTestValue({
         client: {
           tui: {
             showToast: async ({ body }: { body: { title?: string } }) => {
@@ -494,12 +495,12 @@ describe("createEventHandler - model fallback", () => {
           },
         },
       }),
-      pluginConfig: testCoerce({}),
+      pluginConfig: unsafeTestValue({}),
       firstMessageVariantGate: {
         shouldOverride: () => false,
         markApplied: () => {},
       },
-      hooks: testCoerce({
+      hooks: unsafeTestValue({
         modelFallback,
         stopContinuationGuard: null,
         keywordDetector: null,

src/plugin/fallback.cliproxyapi-matrix.test.ts

@@ -11,6 +11,7 @@ import type { RuntimeFallbackPluginInput } from "../hooks/runtime-fallback/types
 import { _resetForTesting } from "../features/claude-code-session-state"
 import { SessionCategoryRegistry } from "../shared/session-category-registry"
 import * as connectedProvidersCache from "../shared/connected-providers-cache"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 type EventHandlerArgs = Parameters<typeof createEventHandler>[0]
 type ChatMessageHandlerArgs = Parameters<typeof createChatMessageHandler>[0]
@@ -18,17 +19,17 @@ type HarnessContext = EventHandlerArgs["ctx"] & RuntimeFallbackPluginInput
 type HarnessEventInput = Parameters<ReturnType<typeof createHarness>["eventHandler"]>[0]
 
 function asHarnessEventInput(input: unknown): HarnessEventInput {
-  return testCoerce<HarnessEventInput>(input)
+  return unsafeTestValue<HarnessEventInput>(input)
 }
 
 function asHarnessContext(ctx: unknown): HarnessContext {
-  return testCoerce<HarnessContext>(ctx)
+  return unsafeTestValue<HarnessContext>(ctx)
 }
 
 function createEventHandlerManagers(
   overrides: Record<string, unknown> = {},
 ): EventHandlerArgs["managers"] {
-  return testCoerce<EventHandlerArgs["managers"]>({
+  return unsafeTestValue<EventHandlerArgs["managers"]>({
     ...({} as EventHandlerArgs["managers"]),
     tmuxSessionManager: {
       onSessionCreated: async () => {},
@@ -41,7 +42,7 @@ function createEventHandlerManagers(
 function createEventHandlerHooks(
   overrides: Record<string, unknown>,
 ): EventHandlerArgs["hooks"] {
-  return testCoerce<EventHandlerArgs["hooks"]>({
+  return unsafeTestValue<EventHandlerArgs["hooks"]>({
     ...({} as EventHandlerArgs["hooks"]),
     ...overrides,
   })
@@ -50,7 +51,7 @@ function createEventHandlerHooks(
 function createChatMessageHandlerHooks(
   overrides: Record<string, unknown>,
 ): ChatMessageHandlerArgs["hooks"] {
-  return testCoerce<ChatMessageHandlerArgs["hooks"]>({
+  return unsafeTestValue<ChatMessageHandlerArgs["hooks"]>({
     ...({} as ChatMessageHandlerArgs["hooks"]),
     ...overrides,
   })
@@ -87,7 +88,7 @@ let readConnectedProvidersCacheSpy: { mockRestore: () => void } | undefined
 let readProviderModelsCacheSpy: { mockRestore: () => void } | undefined
 
 function createPluginConfig(mode: HarnessMode) {
-  return testCoerce<EventHandlerArgs["pluginConfig"]>({
+  return unsafeTestValue<EventHandlerArgs["pluginConfig"]>({
     agents: {
       sisyphus: {
         fallback_models: CLIPROXYAPI_FALLBACKS,
@@ -187,14 +188,14 @@ function createHarness(args: {
         timeout_seconds: args.sessionTimeoutMs ? 30 : 0,
         notify_on_fallback: false,
       },
-      pluginConfig: testCoerce<EventHandlerArgs["pluginConfig"]>(pluginConfig),
+      pluginConfig: unsafeTestValue<EventHandlerArgs["pluginConfig"]>(pluginConfig),
       ...(args.sessionTimeoutMs ? { session_timeout_ms: args.sessionTimeoutMs } : {}),
     })
   }
 
   const eventHandler = createEventHandler({
     ctx,
-    pluginConfig: testCoerce<EventHandlerArgs["pluginConfig"]>(pluginConfig),
+    pluginConfig: unsafeTestValue<EventHandlerArgs["pluginConfig"]>(pluginConfig),
     firstMessageVariantGate: {
       markSessionCreated: () => {},
       clear: () => {},
@@ -209,7 +210,7 @@ function createHarness(args: {
 
   const chatMessageHandler = createChatMessageHandler({
     ctx,
-    pluginConfig: testCoerce<ChatMessageHandlerArgs["pluginConfig"]>(pluginConfig),
+    pluginConfig: unsafeTestValue<ChatMessageHandlerArgs["pluginConfig"]>(pluginConfig),
     firstMessageVariantGate: {
       shouldOverride: () => false,
       markApplied: () => {},

src/plugin/hooks/create-session-hooks.test.ts

@@ -3,8 +3,9 @@ import type { OhMyOpenCodeConfig } from "../../config"
 import type { ModelCacheState } from "../../plugin-state"
 import type { PluginContext } from "../types"
 import { createSessionHooks } from "./create-session-hooks"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
-const mockContext = testCoerce<PluginContext>({
+const mockContext = unsafeTestValue<PluginContext>({
   directory: "/tmp",
   client: {
     tui: {

src/plugin/tool-execute-before.ulw-loop.test.ts

@@ -6,6 +6,7 @@ import { createToolExecuteAfterHandler } from "./tool-execute-after"
 import { createToolExecuteBeforeHandler } from "./tool-execute-before"
 import { ULTRAWORK_VERIFICATION_PROMISE } from "../hooks/ralph-loop/constants"
 import { clearState, readState, writeState } from "../hooks/ralph-loop/storage"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 describe("tool.execute.before ultrawork oracle verification", () => {
 	function createCtx(directory: string) {
@@ -56,7 +57,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		})
 
 		const handler = createToolExecuteBeforeHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"],
 		})
 		const output = { args: createOracleTaskArgs("Check it") }
@@ -78,7 +79,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		const directory = join(tmpdir(), `tool-before-ulw-${Date.now()}-plain`)
 		mkdirSync(directory, { recursive: true })
 		const handler = createToolExecuteBeforeHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"],
 		})
 		const output = { args: createOracleTaskArgs("Check it") }
@@ -96,8 +97,8 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		mkdirSync(directory, { recursive: true })
 		const startLoopCalls: Array<{ sessionID: string; prompt: string; options: Record<string, unknown> }> = []
 		const handler = createToolExecuteBeforeHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
-			hooks: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"]>({
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
+			hooks: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"]>({
 				ralphLoop: {
 					startLoop: (sessionID: string, prompt: string, options?: Record<string, unknown>) => {
 						startLoopCalls.push({ sessionID, prompt, options: options ?? {} })
@@ -148,7 +149,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		})
 
 		const beforeHandler = createToolExecuteBeforeHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"],
 		})
 		const beforeOutput = { args: createOracleTaskArgs("Check it") }
@@ -156,7 +157,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		const metadataFromSyncTask = createSyncTaskMetadata(beforeOutput.args, "ses-oracle")
 
 		const handler = createToolExecuteAfterHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteAfterHandler>[0]["hooks"],
 		})
 
@@ -191,7 +192,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		})
 
 		const handler = createToolExecuteAfterHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteAfterHandler>[0]["hooks"],
 		})
 
@@ -230,7 +231,7 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		})
 
 		const handler = createToolExecuteAfterHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteAfterHandler>[0]["hooks"],
 		})
 
@@ -269,11 +270,11 @@ describe("tool.execute.before ultrawork oracle verification", () => {
 		})
 
 		const beforeHandler = createToolExecuteBeforeHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteBeforeHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteBeforeHandler>[0]["hooks"],
 		})
 		const afterHandler = createToolExecuteAfterHandler({
-			ctx: testCoerce<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
+			ctx: unsafeTestValue<Parameters<typeof createToolExecuteAfterHandler>[0]["ctx"]>(createCtx(directory)),
 			hooks: {} as Parameters<typeof createToolExecuteAfterHandler>[0]["hooks"],
 		})
 

src/plugin/ultrawork-model-override.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, test, beforeEach, afterEach, spyOn } from "bun:test"
 import * as sharedModule from "../shared"
 import * as dbOverrideModule from "./ultrawork-db-model-override"
 import * as sessionStateModule from "../features/claude-code-session-state"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 let resolveUltraworkOverride: (typeof import("./ultrawork-model-override"))["resolveUltraworkOverride"]
 let detectUltrawork: (typeof import("./ultrawork-model-override"))["detectUltrawork"]
@@ -70,7 +71,7 @@ describe("resolveUltraworkOverride", () => {
   }
 
   function createConfig(agentName: string, ultrawork: { model?: string; variant?: string }) {
-    return testCoerce<Parameters<typeof resolveUltraworkOverride>[0]>({
+    return unsafeTestValue<Parameters<typeof resolveUltraworkOverride>[0]>({
       agents: {
         [agentName]: { ultrawork },
       },
@@ -139,7 +140,7 @@ describe("resolveUltraworkOverride", () => {
 
   test("should return null when agent has no ultrawork config", () => {
     //#given
-    const config = testCoerce<Parameters<typeof resolveUltraworkOverride>[0]>({
+    const config = unsafeTestValue<Parameters<typeof resolveUltraworkOverride>[0]>({
       agents: { sisyphus: { model: "anthropic/claude-sonnet-4-6" } },
     })
     const output = createOutput("ultrawork do something")
@@ -278,7 +279,7 @@ describe("applyUltraworkModelOverrideOnMessage", () => {
   }
 
   function createConfig(agentName: string, ultrawork: { model?: string; variant?: string }) {
-    return testCoerce<Parameters<typeof applyUltraworkModelOverrideOnMessage>[0]>({
+    return unsafeTestValue<Parameters<typeof applyUltraworkModelOverrideOnMessage>[0]>({
       agents: {
         [agentName]: { ultrawork },
       },

src/shared/git-worktree/collect-git-diff-stats.test.ts

@@ -3,6 +3,7 @@
 import { describe, expect, test, spyOn, beforeEach, afterEach } from "bun:test"
 import * as childProcess from "node:child_process"
 import * as fs from "node:fs"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("collectGitDiffStats", () => {
   let execFileSyncSpy: ReturnType<typeof spyOn>
@@ -52,7 +53,7 @@ describe("collectGitDiffStats", () => {
     expect(execSyncSpy).not.toHaveBeenCalled()
     expect(execFileSyncSpy.mock.calls.length).toBeGreaterThanOrEqual(3)
 
-    const calls = testCoerce<Array<[string, string[], { cwd?: string }]>>(execFileSyncSpy.mock.calls)
+    const calls = unsafeTestValue<Array<[string, string[], { cwd?: string }]>>(execFileSyncSpy.mock.calls)
     const diffCall = calls.find(([, args]) => args[0] === "diff")
     const statusCall = calls.find(([, args]) => args[0] === "status")
     const untrackedCall = calls.find(([, args]) => args[0] === "ls-files")

src/shared/model-suggestion-retry.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect, mock } from "bun:test"
 import { parseModelSuggestion, promptWithModelSuggestionRetry, promptSyncWithModelSuggestionRetry } from "./model-suggestion-retry"
+import { unsafeTestValue } from "../../test-support/unsafe-test-value"
 
 describe("parseModelSuggestion", () => {
   describe("structured NamedError format", () => {
@@ -217,7 +218,7 @@ describe("promptWithModelSuggestionRetry", () => {
     const client = { session: { promptAsync: promptMock } }
 
     // when calling promptWithModelSuggestionRetry
-    await promptWithModelSuggestionRetry(testCoerce(client), {
+    await promptWithModelSuggestionRetry(unsafeTestValue(client), {
       path: { id: "session-1" },
       body: {
         parts: [{ type: "text", text: "hello" }],
@@ -244,7 +245,7 @@ describe("promptWithModelSuggestionRetry", () => {
     // when calling promptWithModelSuggestionRetry
     // then should throw the error without retrying
     await expect(
-      promptWithModelSuggestionRetry(testCoerce(client), {
+      promptWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           agent: "explore",
@@ -267,7 +268,7 @@ describe("promptWithModelSuggestionRetry", () => {
     // when calling promptWithModelSuggestionRetry
     // then should throw the original error
     await expect(
-      promptWithModelSuggestionRetry(testCoerce(client), {
+      promptWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -288,7 +289,7 @@ describe("promptWithModelSuggestionRetry", () => {
     // when calling promptWithModelSuggestionRetry
     // then should throw the error
     await expect(
-      promptWithModelSuggestionRetry(testCoerce(client), {
+      promptWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -307,7 +308,7 @@ describe("promptWithModelSuggestionRetry", () => {
     const client = { session: { promptAsync: promptMock } }
 
     // when calling with additional body fields
-    await promptWithModelSuggestionRetry(testCoerce(client), {
+    await promptWithModelSuggestionRetry(unsafeTestValue(client), {
       path: { id: "session-1" },
       body: {
         agent: "explore",
@@ -341,7 +342,7 @@ describe("promptWithModelSuggestionRetry", () => {
     // when calling promptWithModelSuggestionRetry
     // then should throw the error
     await expect(
-      promptWithModelSuggestionRetry(testCoerce(client), {
+      promptWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -365,7 +366,7 @@ describe("promptWithModelSuggestionRetry", () => {
     // when calling without model in body
     // then should throw the error
     await expect(
-      promptWithModelSuggestionRetry(testCoerce(client), {
+      promptWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -386,7 +387,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     const client = { session: { prompt: promptMock, promptAsync: promptAsyncMock } }
 
     // when calling promptSyncWithModelSuggestionRetry
-    await promptSyncWithModelSuggestionRetry(testCoerce(client), {
+    await promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
       path: { id: "session-1" },
       body: {
         parts: [{ type: "text", text: "hello" }],
@@ -424,7 +425,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     // when calling with short timeout
     // then should abort the request and throw timeout error
     await expect(
-      promptSyncWithModelSuggestionRetry(testCoerce(client), {
+      promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -451,7 +452,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     const client = { session: { prompt: promptMock } }
 
     // when calling promptSyncWithModelSuggestionRetry
-    await promptSyncWithModelSuggestionRetry(testCoerce(client), {
+    await promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
       path: { id: "session-1" },
       body: {
         parts: [{ type: "text", text: "hello" }],
@@ -477,7 +478,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     // when calling promptSyncWithModelSuggestionRetry
     // then should throw the original error
     await expect(
-      promptSyncWithModelSuggestionRetry(testCoerce(client), {
+      promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -504,7 +505,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     // when calling without model in body
     // then should throw (cannot retry without original model)
     await expect(
-      promptSyncWithModelSuggestionRetry(testCoerce(client), {
+      promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
         path: { id: "session-1" },
         body: {
           parts: [{ type: "text", text: "hello" }],
@@ -521,7 +522,7 @@ describe("promptSyncWithModelSuggestionRetry", () => {
     const client = { session: { prompt: promptMock } }
 
     // when calling with additional body fields
-    await promptSyncWithModelSuggestionRetry(testCoerce(client), {
+    await promptSyncWithModelSuggestionRetry(unsafeTestValue(client), {
       path: { id: "session-1" },
       body: {
         agent: "multimodal-looker",

src/testing/test-coerce-global.d.ts

@@ -1,5 +0,0 @@
-declare global {
-	function testCoerce<TValue>(value: TValue): TValue
-}
-
-export {}

src/tools/background-task/create-background-task.metadata.test.ts

@@ -6,6 +6,7 @@ import { describe, expect, mock, test } from "bun:test"
 import type { BackgroundManager } from "../../features/background-agent"
 import { clearPendingStore, consumeToolMetadata } from "../../features/tool-metadata-store"
 import { createBackgroundTask } from "./create-background-task"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const projectDir = "/Users/yeongyu/local-workspaces/oh-my-opencode"
 
@@ -18,7 +19,7 @@ describe("createBackgroundTask metadata", () => {
     // #given
     clearPendingStore()
 
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       launch: mock(() => Promise.resolve({
         id: "task-1",
         sessionID: null,
@@ -28,7 +29,7 @@ describe("createBackgroundTask metadata", () => {
       })),
       getTask: mock(() => undefined),
     })
-    const client = testCoerce<PluginInput["client"]>({
+    const client = unsafeTestValue<PluginInput["client"]>({
       session: {
         messages: mock(() => Promise.resolve({ data: [] })),
       },

src/tools/background-task/create-background-task.test.ts

@@ -4,6 +4,7 @@ import { describe, test, expect, mock } from "bun:test"
 import type { BackgroundManager } from "../../features/background-agent"
 import type { PluginInput } from "@opencode-ai/plugin"
 import { createBackgroundTask } from "./create-background-task"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("createBackgroundTask", () => {
   const launchMock = mock(async (): Promise<{
@@ -21,12 +22,12 @@ describe("createBackgroundTask", () => {
   }))
   const getTaskMock = mock()
 
-  const mockManager = testCoerce<BackgroundManager>({
+  const mockManager = unsafeTestValue<BackgroundManager>({
     launch: launchMock,
     getTask: getTaskMock,
   })
 
-  const mockClient = testCoerce<PluginInput["client"]>({
+  const mockClient = unsafeTestValue<PluginInput["client"]>({
     session: {
       messages: mock(() => Promise.resolve({ data: [] })),
     },

src/tools/background-task/tools.test.ts

@@ -6,6 +6,7 @@ import type { BackgroundManager, BackgroundTask } from "../../features/backgroun
 import type { ToolContext } from "@opencode-ai/plugin/tool"
 import type { BackgroundCancelClient, BackgroundOutputManager, BackgroundOutputClient } from "./tools"
 import { consumeToolMetadata, clearPendingStore } from "../../features/tool-metadata-store"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const projectDir = "/Users/yeongyu/local-workspaces/oh-my-opencode"
 
@@ -66,7 +67,7 @@ describe("background_output full_session", () => {
     const manager = createMockManager(task)
     const client = createMockClient({})
     const tool = createBackgroundOutput(manager, client)
-    const ctxWithCallId = testCoerce<ToolContext>({
+    const ctxWithCallId = unsafeTestValue<ToolContext>({
       ...mockContext,
       callID: "call-1",
     })
@@ -93,7 +94,7 @@ describe("background_output full_session", () => {
     const manager = createMockManager(task)
     const client = createMockClient({})
     const tool = createBackgroundOutput(manager, client)
-    const ctxWithCallId = testCoerce<ToolContext>({
+    const ctxWithCallId = unsafeTestValue<ToolContext>({
       ...mockContext,
       callID: "call-1",
     })
@@ -387,7 +388,7 @@ describe("background_cancel", () => {
     // #given
     const task = createTask({ status: "running" })
     const cancelled: string[] = []
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       getTask: (id: string) => (id === task.id ? task : undefined),
       getAllDescendantTasks: () => [task],
       cancelTask: async (taskId: string) => {
@@ -412,7 +413,7 @@ describe("background_cancel", () => {
     const taskA = createTask({ id: "task-a", status: "running" })
     const taskB = createTask({ id: "task-b", status: "pending" })
     const cancelled: string[] = []
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       getTask: () => undefined,
       getAllDescendantTasks: () => [taskA, taskB],
       cancelTask: async (taskId: string) => {
@@ -437,7 +438,7 @@ describe("background_cancel", () => {
     // #given
     const taskA = createTask({ id: "task-a", status: "running", sessionId: "ses-a", description: "running task" })
     const taskB = createTask({ id: "task-b", status: "pending", sessionId: undefined, description: "pending task" })
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       getTask: () => undefined,
       getAllDescendantTasks: () => [taskA, taskB],
       cancelTask: async (taskId: string) => {
@@ -461,7 +462,7 @@ describe("background_cancel", () => {
     // #given
     const task = createTask({ id: "task-1", status: "running" })
     const cancelOptions: Array<{ taskId: string; options: unknown }> = []
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       getTask: (id: string) => (id === task.id ? task : undefined),
       getAllDescendantTasks: () => [task],
       cancelTask: async (taskId: string, options?: unknown) => {
@@ -487,7 +488,7 @@ describe("background_cancel", () => {
     // #given
     const task = createTask({ id: "task-1", status: "running" })
     const cancelOptions: Array<{ taskId: string; options: unknown }> = []
-    const manager = testCoerce<BackgroundManager>({
+    const manager = unsafeTestValue<BackgroundManager>({
       getTask: (id: string) => (id === task.id ? task : undefined),
       getAllDescendantTasks: () => [task],
       cancelTask: async (taskId: string, options?: unknown) => {

src/tools/call-omo-agent/session-creator.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, test } from "bun:test"
 
 import { createOrGetSession } from "./session-creator"
 import { _resetForTesting, subagentSessions } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("call-omo-agent createOrGetSession", () => {
   test("creates child session without overriding permission and tracks it as subagent session", async () => {
@@ -37,12 +38,12 @@ describe("call-omo-agent createOrGetSession", () => {
     }
 
     // when
-    const result = await createOrGetSession(testCoerce(args), testCoerce(toolContext), testCoerce(ctx))
+    const result = await createOrGetSession(unsafeTestValue(args), unsafeTestValue(toolContext), unsafeTestValue(ctx))
 
     // then
     expect(result).toEqual({ sessionID: "ses_child", isNew: true })
     expect(createCalls).toHaveLength(1)
-    const createBody = (testCoerce(createCalls[0]))?.body
+    const createBody = (unsafeTestValue(createCalls[0]))?.body
     expect(createBody?.parentID).toBe("ses_parent")
     expect(createBody?.permission).toBeUndefined()
     expect(subagentSessions.has("ses_child")).toBe(true)

src/tools/call-omo-agent/subagent-session-creator.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, test } from "bun:test"
 
 import { resolveOrCreateSessionId } from "./subagent-session-creator"
 import { _resetForTesting, subagentSessions } from "../../features/claude-code-session-state"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("call-omo-agent resolveOrCreateSessionId", () => {
   const originalPlatform = process.platform
@@ -19,7 +20,7 @@ describe("call-omo-agent resolveOrCreateSessionId", () => {
     const { parentDirectory, contextDirectory } = options
     const parentSessionData = parentDirectory ? { data: { directory: parentDirectory } } : { data: {} }
 
-    const ctx = testCoerce<Parameters<typeof resolveOrCreateSessionId>[0]>({
+    const ctx = unsafeTestValue<Parameters<typeof resolveOrCreateSessionId>[0]>({
       directory: contextDirectory,
       client: {
         session: {

src/tools/call-omo-agent/sync-executor.test.ts

@@ -1,3 +1,4 @@
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 const { describe, test, expect, mock } = require("bun:test")
 
 type ExecuteSync = typeof import("./sync-executor").executeSync
@@ -389,7 +390,7 @@ describe("executeSync", () => {
     }
 
     //#when
-    await executeSync(args, toolContext, testCoerce(ctx), deps, undefined, spawnReservation)
+    await executeSync(args, toolContext, unsafeTestValue(ctx), deps, undefined, spawnReservation)
 
     //#then
     expect(spawnReservation.commit).toHaveBeenCalledTimes(1)

src/tools/delegate-task/category-resolver.test.ts

@@ -3,6 +3,7 @@ const { describe, test, expect, beforeEach, afterEach, spyOn, mock } = require("
 import { resolveCategoryExecution } from "./category-resolver"
 import type { ExecutorContext } from "./executor-types"
 import * as connectedProvidersCache from "../../shared/connected-providers-cache"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("resolveCategoryExecution", () => {
 	let connectedProvidersSpy: ReturnType<typeof spyOn> | undefined
@@ -26,8 +27,8 @@ describe("resolveCategoryExecution", () => {
 	})
 
 	const createMockExecutorContext = (): ExecutorContext => ({
-		client: testCoerce({}),
-		manager: testCoerce({}),
+		client: unsafeTestValue({}),
+		manager: unsafeTestValue({}),
 		directory: "/tmp/test",
 		userCategories: {},
 		sisyphusJuniorModel: undefined,

src/tools/delegate-task/metadata-await.test.ts

@@ -2,6 +2,7 @@ const { describe, test, expect } = require("bun:test")
 
 import { executeBackgroundTask } from "./executor"
 import type { DelegateTaskArgs, ToolContextWithMetadata } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("task tool metadata awaiting", () => {
   test("executeBackgroundTask awaits ctx.metadata before returning", async () => {
@@ -28,7 +29,7 @@ describe("task tool metadata awaiting", () => {
       subagent_type: "explore",
     }
 
-    const executorCtx = testCoerce({
+    const executorCtx = unsafeTestValue({
       manager: {
         launch: async () => ({
           id: "task_1",

src/tools/delegate-task/metadata-model-unification.test.ts

@@ -2,6 +2,7 @@ const { describe, test, expect } = require("bun:test")
 
 import type { DelegateTaskArgs, ToolContextWithMetadata } from "./types"
 import type { ParentContext } from "./executor-types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const MODEL = { providerID: "anthropic", modelID: "claude-sonnet-4-6" }
 const MODEL_WITH_VARIANT = { providerID: "google", modelID: "gemini-3.1-pro", variant: "high" }
@@ -63,7 +64,7 @@ describe("metadata model unification", () => {
           load_skills: [], run_in_background: true, subagent_type: "explore",
         }
 
-        await executeBackgroundTask(args, ctx, testCoerce({
+        await executeBackgroundTask(args, ctx, unsafeTestValue({
           manager: {
             launch: async () => ({
               id: "bg_1", description: "test", agent: "explore",
@@ -92,7 +93,7 @@ describe("metadata model unification", () => {
         }
         await executeUnstableAgentTask(
           args, ctx,
-          testCoerce({
+          unsafeTestValue({
             manager: {
               launch: async () => launchedTask,
               getTask: () => launchedTask,
@@ -126,7 +127,7 @@ describe("metadata model unification", () => {
           load_skills: [], run_in_background: true, task_id: "ses_resumed",
         }
 
-        await executeBackgroundContinuation(args, ctx, testCoerce({
+        await executeBackgroundContinuation(args, ctx, unsafeTestValue({
           manager: {
             resume: async () => ({
               id: "bg_2", description: "continue", agent: "explore",
@@ -153,7 +154,7 @@ describe("metadata model unification", () => {
           fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
         }
 
-        await executeSyncContinuation(args, ctx, testCoerce({
+        await executeSyncContinuation(args, ctx, unsafeTestValue({
           client: {
             session: {
               messages: async () => ({
@@ -206,7 +207,7 @@ describe("metadata model unification", () => {
           load_skills: [], run_in_background: true, subagent_type: "explore",
         }
 
-        await executeBackgroundTask(args, ctx, testCoerce({
+        await executeBackgroundTask(args, ctx, unsafeTestValue({
           manager: {
             launch: async () => ({
               id: "bg_1", description: "test", agent: "explore",
@@ -236,7 +237,7 @@ describe("metadata model unification", () => {
 
         await executeUnstableAgentTask(
           args, ctx,
-          testCoerce({
+          unsafeTestValue({
             manager: {
               launch: async () => launchedTask,
               getTask: () => launchedTask,
@@ -270,7 +271,7 @@ describe("metadata model unification", () => {
           load_skills: [], run_in_background: true, task_id: "ses_resumed",
         }
 
-        await executeBackgroundContinuation(args, ctx, testCoerce({
+        await executeBackgroundContinuation(args, ctx, unsafeTestValue({
           manager: {
             resume: async () => ({
               id: "bg_2", description: "continue", agent: "explore",
@@ -297,7 +298,7 @@ describe("metadata model unification", () => {
           fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
         }
 
-        await executeSyncContinuation(args, ctx, testCoerce({
+        await executeSyncContinuation(args, ctx, unsafeTestValue({
           client: {
             session: {
               messages: async () => ({ data: [] }),
@@ -381,7 +382,7 @@ describe("metadata model unification", () => {
           category: "visual-engineering", load_skills: [], run_in_background: true, subagent_type: "explore",
         }
 
-        await executeBackgroundTask(args, ctx, testCoerce({
+        await executeBackgroundTask(args, ctx, unsafeTestValue({
           manager: {
             launch: async () => ({
               id: "bg_variant", description: "test", agent: "explore",
@@ -411,7 +412,7 @@ describe("metadata model unification", () => {
 
         await executeUnstableAgentTask(
           args, ctx,
-          testCoerce({
+          unsafeTestValue({
             manager: {
               launch: async () => launchedTask,
               getTask: () => launchedTask,
@@ -445,7 +446,7 @@ describe("metadata model unification", () => {
           load_skills: [], run_in_background: true, task_id: "ses_resumed_variant",
         }
 
-        await executeBackgroundContinuation(args, ctx, testCoerce({
+        await executeBackgroundContinuation(args, ctx, unsafeTestValue({
           manager: {
             resume: async () => ({
               id: "bg_resume_variant", description: "continue", agent: "explore",
@@ -472,7 +473,7 @@ describe("metadata model unification", () => {
           fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
         }
 
-        await executeSyncContinuation(args, ctx, testCoerce({
+        await executeSyncContinuation(args, ctx, unsafeTestValue({
           client: {
             session: {
               messages: async () => ({

src/tools/delegate-task/metadata-task-id-consistency.test.ts

@@ -2,6 +2,7 @@ const { describe, test, expect } = require("bun:test")
 
 import type { DelegateTaskArgs, ToolContextWithMetadata } from "./types"
 import type { ParentContext } from "./executor-types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const MODEL = { providerID: "anthropic", modelID: "claude-sonnet-4-6" }
 
@@ -64,7 +65,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         load_skills: [], run_in_background: true, subagent_type: "explore",
       }
 
-      await executeBackgroundTask(args, ctx, testCoerce({
+      await executeBackgroundTask(args, ctx, unsafeTestValue({
         manager: {
           launch: async () => ({
             id: "bg_abc123", description: "test", agent: "explore",
@@ -98,7 +99,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
 
       await executeUnstableAgentTask(
         args, ctx,
-        testCoerce({
+        unsafeTestValue({
           manager: {
             launch: async () => launchedTask,
             getTask: () => launchedTask,
@@ -136,7 +137,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         load_skills: [], run_in_background: true, task_id: "ses_resumed_x",
       }
 
-      await executeBackgroundContinuation(args, ctx, testCoerce({
+      await executeBackgroundContinuation(args, ctx, unsafeTestValue({
         manager: {
           resume: async () => ({
             id: "bg_resumed_y", description: "continue", agent: "explore",
@@ -160,7 +161,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         load_skills: [], run_in_background: true, task_id: "ses_resumed_x",
       }
 
-      await executeBackgroundContinuation(args, ctx, testCoerce({
+      await executeBackgroundContinuation(args, ctx, unsafeTestValue({
         manager: {
           resume: async () => ({
             id: "bg_resumed_y", description: "continue", agent: "explore",
@@ -187,7 +188,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         task_id: "ses_resumed_x",
       }
 
-      await executeBackgroundContinuation(args, ctx, testCoerce({
+      await executeBackgroundContinuation(args, ctx, unsafeTestValue({
         manager: {
           resume: async () => ({
             id: "bg_resumed_y", description: "continue", agent: "explore",
@@ -216,7 +217,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
       }
 
-      await executeSyncContinuation(args, ctx, testCoerce({
+      await executeSyncContinuation(args, ctx, unsafeTestValue({
         client: {
           session: {
             messages: async () => ({
@@ -246,7 +247,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
       }
 
-      await executeSyncContinuation(args, ctx, testCoerce({
+      await executeSyncContinuation(args, ctx, unsafeTestValue({
         client: {
           session: {
             messages: async () => ({
@@ -275,7 +276,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
       }
 
-      await executeSyncContinuation(args, ctx, testCoerce({
+      await executeSyncContinuation(args, ctx, unsafeTestValue({
         client: {
           session: {
             messages: async () => ({
@@ -309,7 +310,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         fetchSyncResult: async () => ({ ok: true as const, textContent: "done" }),
       }
 
-      await executeSyncContinuation(args, ctx, testCoerce({
+      await executeSyncContinuation(args, ctx, unsafeTestValue({
         client: {
           session: {
             messages: async () => ({
@@ -368,7 +369,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         run_in_background: true,
       }
 
-      await executeBackgroundTask(args, ctx, testCoerce({
+      await executeBackgroundTask(args, ctx, unsafeTestValue({
         manager: {
           launch: async () => ({
             id: "bg_abc123", description: "test", agent: "Sisyphus-Junior",
@@ -402,7 +403,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
 
       await executeUnstableAgentTask(
         args, ctx,
-        testCoerce({
+        unsafeTestValue({
           manager: {
             launch: async () => launchedTask,
             getTask: () => launchedTask,
@@ -438,7 +439,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         load_skills: [], run_in_background: true, task_id: "ses_resume_title",
       }
 
-      await executeBackgroundContinuation(args, ctx, testCoerce({
+      await executeBackgroundContinuation(args, ctx, unsafeTestValue({
         manager: {
           resume: async () => ({
             id: "bg_resume_title", description: "continue work", agent: "explore",
@@ -460,7 +461,7 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         load_skills: [], run_in_background: false, task_id: "ses_sync_title",
       }
 
-      await executeSyncContinuation(args, ctx, testCoerce({
+      await executeSyncContinuation(args, ctx, unsafeTestValue({
         client: {
           session: {
             messages: async () => ({
@@ -500,8 +501,8 @@ describe("taskId and backgroundTaskId metadata consistency", () => {
         },
       }
 
-      const bgOutput = createBackgroundOutput(testCoerce(manager), testCoerce(client))
-      await bgOutput.execute(testCoerce({ task_id: "bg_output_xyz" }), testCoerce(ctx))
+      const bgOutput = createBackgroundOutput(unsafeTestValue(manager), unsafeTestValue(client))
+      await bgOutput.execute(unsafeTestValue({ task_id: "bg_output_xyz" }), unsafeTestValue(ctx))
 
       const meta = ctx.captured.find((m: any) => m.metadata?.backgroundTaskId)
       expect(meta).toBeDefined()

src/tools/delegate-task/task-schema.test.ts

@@ -1,3 +1,4 @@
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 const { describe, expect, test } = require("bun:test")
 
 function requireFresh<T>(modulePath: string): T {
@@ -18,7 +19,7 @@ function createDelegateTask(...args: Parameters<typeof import("./tools").createD
 		const toolDefinition = createDelegateTask({ manager: {} as never, client: {} as never, directory: "/tmp/test" })
 
 		//#when
-		const categorySchema = testCoerce<{
+		const categorySchema = unsafeTestValue<{
 			def: {
 				type: string
 				innerType: {

src/tools/delegate-task/unstable-agent-permission.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test"
 
 import { executeUnstableAgentTask } from "./unstable-agent-task"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("executeUnstableAgentTask session permission", () => {
   test("passes question-deny session permission into background launch", async () => {
@@ -33,7 +34,7 @@ describe("executeUnstableAgentTask session permission", () => {
       metadata: () => {},
       abort: new AbortController().signal,
     } satisfies Parameters<typeof executeUnstableAgentTask>[1]
-    const executorContext = testCoerce<Parameters<typeof executeUnstableAgentTask>[2]>({
+    const executorContext = unsafeTestValue<Parameters<typeof executeUnstableAgentTask>[2]>({
       manager: mockManager,
       client: {
         session: {

src/tools/hashline-edit/normalize-edits.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from "bun:test"
 import { normalizeHashlineEdits, type RawHashlineEdit } from "./normalize-edits"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("normalizeHashlineEdits", () => {
   it("maps replace with pos to replace", () => {
@@ -51,7 +52,7 @@ describe("normalizeHashlineEdits", () => {
 
   it("rejects legacy payload without op", () => {
     //#given
-    const input = testCoerce<Parameters<
+    const input = unsafeTestValue<Parameters<
       typeof normalizeHashlineEdits
     >[0]>([{ type: "set_line", line: "2#VK", text: "updated" }])
 

src/tools/hashline-edit/tools.test.ts

@@ -6,9 +6,10 @@ import { canonicalizeFileText } from "./file-text-canonicalization"
 import * as fs from "node:fs"
 import * as os from "node:os"
 import * as path from "node:path"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createMockContext(): ToolContext {
-  return testCoerce<ToolContext>({
+  return unsafeTestValue<ToolContext>({
     sessionID: "test",
     messageID: "test",
     agent: "test",

src/tools/look-at/multimodal-agent-metadata.test.ts

@@ -6,6 +6,7 @@ import { resolveMultimodalLookerAgentMetadata } from "./multimodal-agent-metadat
 import { setVisionCapableModelsCache, clearVisionCapableModelsCache } from "../../shared/vision-capable-models-cache"
 import * as connectedProvidersCache from "../../shared/connected-providers-cache"
 import * as modelAvailability from "../../shared/model-availability"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 function createPluginInput(agentData: Array<Record<string, unknown>>): PluginInput {
   const client = {} as PluginInput["client"]
@@ -32,8 +33,8 @@ describe("resolveMultimodalLookerAgentMetadata", () => {
 
   afterEach(() => {
     clearVisionCapableModelsCache()
-    ;(testCoerce<{ mockRestore?: () => void }>(modelAvailability.fetchAvailableModels)).mockRestore?.()
-    ;(testCoerce<{ mockRestore?: () => void }>(connectedProvidersCache.readConnectedProvidersCache)).mockRestore?.()
+    ;(unsafeTestValue<{ mockRestore?: () => void }>(modelAvailability.fetchAvailableModels)).mockRestore?.()
+    ;(unsafeTestValue<{ mockRestore?: () => void }>(connectedProvidersCache.readConnectedProvidersCache)).mockRestore?.()
   })
 
   test("returns configured multimodal-looker model when it already matches a vision-capable override", async () => {

src/tools/look-at/session-poller.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, test, mock } from "bun:test"
 import { pollSessionUntilIdle } from "./session-poller"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 type SessionStatusResult = {
   data?: Record<string, { type: string; attempt?: number; message?: string; next?: number }>
@@ -30,7 +31,7 @@ describe("pollSessionUntilIdle", () => {
       { data: { ses_test: { type: "idle" } } },
     ])
 
-    await pollSessionUntilIdle(testCoerce(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
+    await pollSessionUntilIdle(unsafeTestValue(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
 
     expect(client.session.status).toHaveBeenCalledTimes(3)
   })
@@ -43,7 +44,7 @@ describe("pollSessionUntilIdle", () => {
       { data: {} },
     ])
 
-    await pollSessionUntilIdle(testCoerce(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
+    await pollSessionUntilIdle(unsafeTestValue(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
 
     expect(client.session.status).toHaveBeenCalledTimes(1)
   })
@@ -57,7 +58,7 @@ describe("pollSessionUntilIdle", () => {
     ])
 
     await expect(
-      pollSessionUntilIdle(testCoerce(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 50 })
+      pollSessionUntilIdle(unsafeTestValue(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 50 })
     ).rejects.toThrow("timed out")
   })
 
@@ -69,7 +70,7 @@ describe("pollSessionUntilIdle", () => {
       { error: new Error("API error") },
     ])
 
-    await pollSessionUntilIdle(testCoerce(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
+    await pollSessionUntilIdle(unsafeTestValue(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
 
     expect(client.session.status).toHaveBeenCalledTimes(1)
   })
@@ -85,7 +86,7 @@ describe("pollSessionUntilIdle", () => {
       { data: {} },
     ])
 
-    await pollSessionUntilIdle(testCoerce(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
+    await pollSessionUntilIdle(unsafeTestValue(client), "ses_test", { pollIntervalMs: 10, timeoutMs: 5000 })
 
     expect(client.session.status).toHaveBeenCalledTimes(4)
   })
@@ -98,7 +99,7 @@ describe("pollSessionUntilIdle", () => {
       { data: {} },
     ])
 
-    await pollSessionUntilIdle(testCoerce(client), "ses_test")
+    await pollSessionUntilIdle(unsafeTestValue(client), "ses_test")
 
     expect(client.session.status).toHaveBeenCalledTimes(1)
   })

src/tools/look-at/tools.test.ts

@@ -2,6 +2,7 @@ import { afterEach, describe, expect, test, mock } from "bun:test"
 import type { ToolContext } from "@opencode-ai/plugin/tool"
 import { clearVisionCapableModelsCache, setVisionCapableModelsCache } from "../../shared/vision-capable-models-cache"
 import { normalizeArgs, validateArgs, createLookAt } from "./tools"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("look-at tool", () => {
   afterEach(() => {
@@ -14,7 +15,7 @@ describe("look-at tool", () => {
     // then should normalize to file_path
     test("normalizes path to file_path for LLM compatibility", () => {
       const args = { path: "/some/file.png", goal: "analyze" }
-      const normalized = normalizeArgs(testCoerce(args))
+      const normalized = normalizeArgs(unsafeTestValue(args))
       expect(normalized.file_path).toBe("/some/file.png")
       expect(normalized.goal).toBe("analyze")
     })
@@ -33,7 +34,7 @@ describe("look-at tool", () => {
     // then prefer file_path
     test("prefers file_path over path when both provided", () => {
       const args = { file_path: "/preferred.png", path: "/fallback.png", goal: "test" }
-      const normalized = normalizeArgs(testCoerce(args))
+      const normalized = normalizeArgs(unsafeTestValue(args))
       expect(normalized.file_path).toBe("/preferred.png")
     })
 
@@ -42,7 +43,7 @@ describe("look-at tool", () => {
     // then preserve image_data in normalized args
     test("preserves image_data when provided", () => {
       const args = { image_data: "data:image/png;base64,iVBORw0KGgo=", goal: "analyze" }
-      const normalized = normalizeArgs(testCoerce(args))
+      const normalized = normalizeArgs(unsafeTestValue(args))
       expect(normalized.image_data).toBe("data:image/png;base64,iVBORw0KGgo=")
       expect(normalized.file_path).toBeUndefined()
     })
@@ -69,7 +70,7 @@ describe("look-at tool", () => {
     // when validated
     // then clear error message
     test("returns error when neither file_path nor image_data provided", () => {
-      const args = testCoerce({ goal: "analyze" })
+      const args = unsafeTestValue({ goal: "analyze" })
       const error = validateArgs(args)
       expect(error).toContain("file_path")
       expect(error).toContain("image_data")
@@ -88,7 +89,7 @@ describe("look-at tool", () => {
     // when validated
     // then clear error message
     test("returns error when goal is missing", () => {
-      const args = testCoerce({ file_path: "/some/path.png" })
+      const args = unsafeTestValue({ file_path: "/some/path.png" })
       const error = validateArgs(args)
       expect(error).toContain("goal")
       expect(error).toContain("required")
@@ -156,7 +157,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -193,7 +194,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -230,7 +231,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -291,7 +292,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -346,7 +347,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -395,7 +396,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -437,7 +438,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -486,7 +487,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -515,7 +516,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -539,7 +540,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -579,7 +580,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -632,7 +633,7 @@ describe("look-at tool", () => {
         },
       }
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -701,7 +702,7 @@ describe("look-at tool", () => {
     test("instructs agent to analyze attached file when Read is disabled (file_path mode)", async () => {
       const { mockClient, captured } = captureLastPromptBody()
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -726,7 +727,7 @@ describe("look-at tool", () => {
     test("instructs agent to analyze attached image when image_data is provided", async () => {
       const { mockClient, captured } = captureLastPromptBody()
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))
@@ -751,7 +752,7 @@ describe("look-at tool", () => {
     test("explicitly warns the agent not to attempt Read when Read is disabled", async () => {
       const { mockClient, captured } = captureLastPromptBody()
 
-      const tool = createLookAt(testCoerce({
+      const tool = createLookAt(unsafeTestValue({
         client: mockClient,
         directory: "/project",
       }))

src/tools/lsp/client.test.ts

@@ -16,6 +16,7 @@ afterAll(() => { mock.restore() })
 
 import { LSPClient, lspManager, validateCwd } from "./client"
 import type { ResolvedServer } from "./types"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 describe("LSPClient", () => {
   beforeEach(async () => {
@@ -36,7 +37,7 @@ describe("LSPClient", () => {
       const originalSetTimeout = globalThis.setTimeout
       globalThis.setTimeout = ((fn: (...args: unknown[]) => void, _ms?: number) => {
         fn()
-        return testCoerce<ReturnType<typeof setTimeout>>(0)
+        return unsafeTestValue<ReturnType<typeof setTimeout>>(0)
       }) as typeof setTimeout
 
       const server: ResolvedServer = {
@@ -50,7 +51,7 @@ describe("LSPClient", () => {
 
       // Stub protocol output: we only want to assert notifications.
       const sendNotificationSpy = spyOn(
-        testCoerce<{ sendNotification: (m: string, p?: unknown) => void }>(client),
+        unsafeTestValue<{ sendNotification: (m: string, p?: unknown) => void }>(client),
         "sendNotification"
       )
 

src/tools/session-manager/storage.test.ts

@@ -3,6 +3,7 @@ import { mkdirSync, writeFileSync, rmSync, existsSync, readdirSync } from "node:
 import { join } from "node:path"
 import { tmpdir } from "node:os"
 import { randomUUID } from "node:crypto"
+import { unsafeTestValue } from "../../../test-support/unsafe-test-value"
 
 const TEST_DIR = join(tmpdir(), `omo-test-session-manager-${randomUUID()}`)
 const TEST_MESSAGE_STORAGE = join(TEST_DIR, "message")
@@ -448,7 +449,7 @@ describe("session-manager storage - SDK path (beta mode)", () => {
 
     // Re-import to get fresh module with mocked isSqliteBackend
     const { setStorageClient, getMainSessions } = await import("./storage")
-    setStorageClient(testCoerce<Parameters<typeof setStorageClient>[0]>(mockClient))
+    setStorageClient(unsafeTestValue<Parameters<typeof setStorageClient>[0]>(mockClient))
 
     // when
     const sessions = await getMainSessions({ directory: "/test" })
@@ -473,7 +474,7 @@ describe("session-manager storage - SDK path (beta mode)", () => {
     }))
 
     const { setStorageClient, getAllSessions } = await import("./storage")
-    setStorageClient(testCoerce<Parameters<typeof setStorageClient>[0]>(mockClient))
+    setStorageClient(unsafeTestValue<Parameters<typeof setStorageClient>[0]>(mockClient))
 
     // when
     const sessionIDs = await getAllSessions()
@@ -503,7 +504,7 @@ describe("session-manager storage - SDK path (beta mode)", () => {
     }))
 
     const { setStorageClient, readSessionMessages } = await import("./storage")
-    setStorageClient(testCoerce<Parameters<typeof setStorageClient>[0]>(mockClient))
+    setStorageClient(unsafeTestValue<Parameters<typeof setStorageClient>[0]>(mockClient))
 
     // when
     const messages = await readSessionMessages("ses_test")
@@ -531,7 +532,7 @@ describe("session-manager storage - SDK path (beta mode)", () => {
     }))
 
     const { setStorageClient, readSessionTodos } = await import("./storage")
-    setStorageClient(testCoerce<Parameters<typeof setStorageClient>[0]>(mockClient))
+    setStorageClient(unsafeTestValue<Parameters<typeof setStorageClient>[0]>(mockClient))
 
     // when
     const todos = await readSessionTodos("ses_test")
@@ -555,7 +556,7 @@ describe("session-manager storage - SDK path (beta mode)", () => {
     }))
 
     const { setStorageClient, readSessionMessages } = await import("./storage")
-    setStorageClient(testCoerce<Parameters<typeof setStorageClient>[0]>(mockClient))
+    setStorageClient(unsafeTestValue<Parameters<typeof setStorageClient>[0]>(mockClient))
 
     await expect(readSessionMessages("ses_test")).rejects.toThrow("API error")
   })

src/tools/skill/zauc-mocks-skill-tools/tools.test.ts

@@ -12,6 +12,7 @@ import { clearSkillCache } from "../../../features/opencode-skill-loader/skill-c
 import type { LoadedSkill } from "../../../features/opencode-skill-loader/types"
 import type { CommandInfo } from "../../slashcommand/types"
 import type { Tool as McpTool } from "@modelcontextprotocol/sdk/types.js"
+import { unsafeTestValue } from "../../../../test-support/unsafe-test-value"
 
 const originalReadFileSync = fs.readFileSync.bind(fs)
 
@@ -205,7 +206,7 @@ describe("skill tool - agent restriction", () => {
     // given
     const loadedSkills = [createMockSkill("sisyphus-only-skill", { agent: "sisyphus" })]
     const tool = createSkillTool({ skills: loadedSkills })
-    const contextWithoutAgent = { ...mockContext, agent: testCoerce<string>(undefined) }
+    const contextWithoutAgent = { ...mockContext, agent: unsafeTestValue<string>(undefined) }
 
     // when / #then
     return expect(tool.execute({ name: "sisyphus-only-skill" }, contextWithoutAgent)).rejects.toThrow(

test-setup.ts

@@ -12,8 +12,6 @@ const { restoreModuleMocks } = installModuleMockLifecycle(mock)
 let environmentSnapshot: NodeJS.ProcessEnv = { ...process.env }
 let workingDirectorySnapshot = process.cwd()
 
-globalThis.testCoerce = <TValue>(value: TValue): TValue => value
-
 function cleanupOmoCacheDir(cacheDir: string): void {
   rmSync(cacheDir, { recursive: true, force: true })
 }