refactor(hooks): use unified internal prompt dispatch

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

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

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

@@ -6,7 +6,7 @@ import {
 import { stripAgentListSortPrefix } from "../../shared/agent-display-names"
 import { log } from "../../shared/logger"
 import { createInternalAgentContinuationTextPart, resolveInheritedPromptTools } from "../../shared"
-import { promptAsyncAfterSessionIdle } from "../shared/prompt-async-gate"
+import { dispatchInternalPrompt } from "../shared/prompt-async-gate"
 import { HOOK_NAME } from "./hook-name"
 import { BOULDER_CONTINUATION_PROMPT } from "./system-reminder-templates"
 import { resolveRecentPromptContextForSession } from "./recent-model-resolver"
@@ -92,21 +92,22 @@ export async function injectBoulderContinuation(input: {
       : undefined
     const launchVariant = promptContext.model?.variant
 
-    const promptResult = await promptAsyncAfterSessionIdle({
+    const promptResult = await dispatchInternalPrompt({
+      mode: "async",
       client: ctx.client,
       sessionID,
       source: HOOK_NAME,
       settleMs: idleSettleMs,
       input: {
-      path: { id: sessionID },
-      body: {
-        agent: continuationAgent,
-        ...(launchModel ? { model: launchModel } : {}),
-        ...(launchVariant ? { variant: launchVariant } : {}),
-        ...(inheritedTools ? { tools: inheritedTools } : {}),
-        parts: [createInternalAgentContinuationTextPart(prompt)],
-      },
-      query: { directory: ctx.directory },
+        path: { id: sessionID },
+        body: {
+          agent: continuationAgent,
+          ...(launchModel ? { model: launchModel } : {}),
+          ...(launchVariant ? { variant: launchVariant } : {}),
+          ...(inheritedTools ? { tools: inheritedTools } : {}),
+          parts: [createInternalAgentContinuationTextPart(prompt)],
+        },
+        query: { directory: ctx.directory },
       },
     })
     if (promptResult.status === "failed") {

src/hooks/atlas/idle-event.ts

@@ -20,7 +20,7 @@ import { createInternalAgentContinuationTextPart } from "../../shared"
 import { getAgentConfigKey } from "../../shared/agent-display-names"
 import { log } from "../../shared/logger"
 import { shouldPromptAfterSessionIdle } from "../shared/session-idle-settle"
-import { promptAsyncAfterSessionIdle } from "../shared/prompt-async-gate"
+import { dispatchInternalPrompt } from "../shared/prompt-async-gate"
 import { injectBoulderContinuation } from "./boulder-continuation-injector"
 import { HOOK_NAME } from "./hook-name"
 import { resolveActiveBoulderSession } from "./resolve-active-boulder-session"
@@ -291,7 +291,8 @@ export async function handleAtlasSessionIdle(input: {
         return
       }
 
-      const promptResult = await promptAsyncAfterSessionIdle({
+      const promptResult = await dispatchInternalPrompt({
+        mode: "async",
         client: ctx.client,
         sessionID,
         source: HOOK_NAME,