feat: add TTS hint to system prompt

src/agents/pi-embedded-runner/compact.ts

@@ -66,6 +66,7 @@ import { splitSdkTools } from "./tool-split.js";
 import type { EmbeddedPiCompactResult } from "./types.js";
 import { formatUserTime, resolveUserTimeFormat, resolveUserTimezone } from "../date-time.js";
 import { describeUnknownError, mapThinkingLevel, resolveExecToolDefaults } from "./utils.js";
+import { buildTtsSystemPromptHint } from "../../tts/tts.js";
 
 export async function compactEmbeddedPiSession(params: {
   sessionId: string;
@@ -298,6 +299,7 @@ export async function compactEmbeddedPiSession(params: {
           cwd: process.cwd(),
           moduleUrl: import.meta.url,
         });
+        const ttsHint = params.config ? buildTtsSystemPromptHint(params.config) : undefined;
         const appendPrompt = buildEmbeddedSystemPrompt({
           workspaceDir: effectiveWorkspace,
           defaultThinkLevel: params.thinkLevel,
@@ -310,6 +312,7 @@ export async function compactEmbeddedPiSession(params: {
             : undefined,
           skillsPrompt,
           docsPath: docsPath ?? undefined,
+          ttsHint,
           promptMode,
           runtimeInfo,
           messageToolHints,

src/agents/pi-embedded-runner/run/attempt.ts

@@ -78,6 +78,7 @@ import { toClientToolDefinitions } from "../../pi-tool-definition-adapter.js";
 import { buildSystemPromptParams } from "../../system-prompt-params.js";
 import { describeUnknownError, mapThinkingLevel } from "../utils.js";
 import { resolveSandboxRuntimeStatus } from "../../sandbox/runtime-status.js";
+import { buildTtsSystemPromptHint } from "../../../tts/tts.js";
 import { isTimeoutError } from "../../failover-error.js";
 import { getGlobalHookRunner } from "../../../plugins/hook-runner-global.js";
 import { MAX_IMAGE_BYTES } from "../../../media/constants.js";
@@ -315,6 +316,7 @@ export async function runEmbeddedAttempt(
       cwd: process.cwd(),
       moduleUrl: import.meta.url,
     });
+    const ttsHint = params.config ? buildTtsSystemPromptHint(params.config) : undefined;
 
     const appendPrompt = buildEmbeddedSystemPrompt({
       workspaceDir: effectiveWorkspace,
@@ -328,6 +330,7 @@ export async function runEmbeddedAttempt(
         : undefined,
       skillsPrompt,
       docsPath: docsPath ?? undefined,
+      ttsHint,
       workspaceNotes,
       reactionGuidance,
       promptMode,

src/agents/pi-embedded-runner/system-prompt.ts

@@ -16,6 +16,7 @@ export function buildEmbeddedSystemPrompt(params: {
   heartbeatPrompt?: string;
   skillsPrompt?: string;
   docsPath?: string;
+  ttsHint?: string;
   reactionGuidance?: {
     level: "minimal" | "extensive";
     channel: string;
@@ -55,6 +56,7 @@ export function buildEmbeddedSystemPrompt(params: {
     heartbeatPrompt: params.heartbeatPrompt,
     skillsPrompt: params.skillsPrompt,
     docsPath: params.docsPath,
+    ttsHint: params.ttsHint,
     workspaceNotes: params.workspaceNotes,
     reactionGuidance: params.reactionGuidance,
     promptMode: params.promptMode,