fix(start-work): keep native command agents on config keys

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

@@ -7,7 +7,6 @@ import { tmpdir } from "node:os"
 import { randomUUID } from "node:crypto"
 import { createStartWorkHook } from "./index"
 import { createAtlasHook } from "../atlas"
-import { getAgentDisplayName, getAgentListDisplayName } from "../../shared/agent-display-names"
 import {
   writeBoulderState,
   clearBoulderState,
@@ -467,7 +466,7 @@ You are starting a Sisyphus work session.
       updateSpy.mockRestore()
     })
 
-    test("should stamp the outgoing message with Atlas list key so follow-up events keep the handoff", async () => {
+    test("should stamp the outgoing message with Atlas config key so OpenCode can resolve the agent", async () => {
       // given
       const hook = createStartWorkHook(createMockPluginInput())
       const output = {
@@ -481,8 +480,8 @@ You are starting a Sisyphus work session.
         output
       )
 
-      // then
-      expect(output.message.agent).toBe(getAgentDisplayName("atlas"))
+      // then - config key, not display name (matches no-sisyphus-gpt / boulder-continuation-injector convention)
+      expect(output.message.agent).toBe("atlas")
     })
 
     test("should switch to Atlas even when current session is Sisyphus (regression: #3155)", async () => {
@@ -502,7 +501,7 @@ You are starting a Sisyphus work session.
       )
 
       // atlas is registered in beforeEach, so it must be selected
-      expect(output.message.agent).toBe(getAgentDisplayName("atlas"))
+      expect(output.message.agent).toBe("atlas")
       expect(sessionState.getSessionAgent("ses-sisyphus-to-atlas")).toBe("atlas")
     })
 
@@ -525,7 +524,7 @@ You are starting a Sisyphus work session.
       )
 
       // then
-      expect(output.message.agent).toBe("Sisyphus - Ultraworker")
+      expect(output.message.agent).toBe("sisyphus")
       expect(sessionState.getSessionAgent("ses-prometheus-to-sisyphus")).toBe("sisyphus")
     })
 
@@ -553,7 +552,7 @@ You are starting a Sisyphus work session.
       )
 
       // then
-      expect(output.message.agent).toBe("Sisyphus - Ultraworker")
+      expect(output.message.agent).toBe("sisyphus")
       expect(sessionState.getSessionAgent("ses-prometheus-to-worker")).toBe("sisyphus")
       expect(readBoulderState(testDir)?.agent).toBe("sisyphus")
     })
@@ -588,7 +587,7 @@ You are starting a Sisyphus work session.
       )
 
       // then
-      expect(output.message.agent).toBe("Sisyphus - Ultraworker")
+      expect(output.message.agent).toBe("sisyphus")
       expect(readBoulderState(testDir)?.agent).toBe("sisyphus")
     })
 
@@ -623,7 +622,7 @@ You are starting a Sisyphus work session.
       await atlasHook.handler({ event: { type: "session.idle", properties: { sessionID: "session-123" } } })
 
       // then
-      expect(output.message.agent).toBe(getAgentDisplayName("atlas"))
+      expect(output.message.agent).toBe("atlas")
       expect(readBoulderState(testDir)?.session_ids).toContain("session-123")
       expect(readBoulderState(testDir)?.agent).toBe("atlas")
       expect(promptAsyncMock).toHaveBeenCalledTimes(1)
@@ -713,7 +712,7 @@ You are starting a Sisyphus work session.
         await firePendingTimers()
 
         // then
-        expect(output.message.agent).toBe(getAgentDisplayName("atlas"))
+        expect(output.message.agent).toBe("atlas")
         expect(readBoulderState(testDir)?.session_ids).toContain("session-123")
         expect(readBoulderState(testDir)?.agent).toBe("atlas")
         expect(promptAsyncMock).toHaveBeenCalledTimes(1)

src/hooks/start-work/start-work-hook.ts

@@ -11,11 +11,6 @@ import {
   clearBoulderState,
 } from "../../features/boulder-state"
 import { log } from "../../shared/logger"
-import {
-  getAgentDisplayName,
-  getAgentListDisplayName,
-  stripAgentListSortPrefix,
-} from "../../shared/agent-display-names"
 import {
   isAgentRegistered,
   updateSessionAgent,
@@ -86,12 +81,9 @@ export function createStartWorkHook(ctx: PluginInput) {
     const activeAgent = isAgentRegistered("atlas")
       ? "atlas"
       : "sisyphus"
-    const activeAgentDisplayName = activeAgent === "atlas"
-      ? getAgentListDisplayName(activeAgent)
-      : getAgentDisplayName(activeAgent)
     updateSessionAgent(input.sessionID, activeAgent)
     if (output.message) {
-      output.message["agent"] = stripAgentListSortPrefix(activeAgentDisplayName)
+      output.message["agent"] = activeAgent
     }
 
     const existingState = readBoulderState(ctx.directory)

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

@@ -97,7 +97,7 @@ describe("applyCommandConfig", () => {
     expect(commandConfig["agents-global-skill"]?.description).toContain("Agents global skill");
   });
 
-  test("remaps Atlas command agents to the list display name used by runtime agent lookup", async () => {
+  test("normalizes Atlas command agents to the config key OpenCode expects for native routing", async () => {
     // given
     loadBuiltinCommandsSpy.mockReturnValue({
       "start-work": {
@@ -119,6 +119,31 @@ describe("applyCommandConfig", () => {
 
     // then
     const commandConfig = config.command as Record<string, { agent?: string }>;
-    expect(commandConfig["start-work"]?.agent).toBe(getAgentDisplayName("atlas"));
+    expect(commandConfig["start-work"]?.agent).toBe("atlas");
+  });
+
+  test("normalizes legacy display-name command agents back to config keys", async () => {
+    // given
+    loadBuiltinCommandsSpy.mockReturnValue({
+      "start-work": {
+        name: "start-work",
+        description: "(builtin) Start work",
+        template: "template",
+        agent: getAgentDisplayName("atlas"),
+      },
+    });
+    const config: Record<string, unknown> = { command: {} };
+
+    // when
+    await applyCommandConfig({
+      config,
+      pluginConfig: createPluginConfig(),
+      ctx: { directory: "/tmp" },
+      pluginComponents: createPluginComponents(),
+    });
+
+    // then
+    const commandConfig = config.command as Record<string, { agent?: string }>;
+    expect(commandConfig["start-work"]?.agent).toBe("atlas");
   });
 });

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

@@ -1,5 +1,5 @@
 import type { OhMyOpenCodeConfig } from "../config";
-import { getAgentDisplayName } from "../shared/agent-display-names";
+import { getAgentConfigKey } from "../shared/agent-display-names";
 import {
   loadUserCommands,
   loadProjectCommands,
@@ -96,7 +96,7 @@ export async function applyCommandConfig(params: {
 function remapCommandAgentFields(commands: Record<string, Record<string, unknown>>): void {
   for (const cmd of Object.values(commands)) {
     if (cmd?.agent && typeof cmd.agent === "string") {
-      cmd.agent = getAgentDisplayName(cmd.agent);
+      cmd.agent = getAgentConfigKey(cmd.agent);
     }
   }
 }

src/plugin-interface.test.ts

@@ -165,7 +165,7 @@ describe("createPluginInterface - command.execute.before", () => {
     )
 
     // then
-    expect(output.message.agent).toBe("Atlas - Plan Executor")
+    expect(output.message.agent).toBe("atlas")
     expect(getSessionAgent("ses-command-atlas")).toBe("atlas")
     expect(readBoulderState(testDir)?.agent).toBe("atlas")
   })

src/plugin/chat-message.test.ts

@@ -87,7 +87,7 @@ describe("createChatMessageHandler - /start-work integration", () => {
     await handler(input, output)
 
     // then
-    expect(output.message["agent"]).toBe("Sisyphus - Ultraworker")
+    expect(output.message["agent"]).toBe("sisyphus")
     expect(output.parts[0].text).toContain("<auto-slash-command>")
     expect(output.parts[0].text).toContain("Auto-Selected Plan")
     expect(output.parts[0].text).toContain("boulder.json has been created")
@@ -116,7 +116,7 @@ describe("createChatMessageHandler - /start-work integration", () => {
     await handler(input, output)
 
     // then
-    expect(output.message["agent"]).toBe("Sisyphus - Ultraworker")
+    expect(output.message["agent"]).toBe("sisyphus")
     expect(output.parts[0].text).toContain("<auto-slash-command>")
     expect(output.parts[0].text).toContain("Auto-Selected Plan")
     expect(output.parts[0].text).toContain("my-feature-plan")