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/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 } }) => {