refactor: expose extension sdk boundary seams

extensions/codex/src/app-server/context-engine-projection.ts

@@ -1,4 +1,4 @@
-import type { AgentMessage } from "@mariozechner/pi-agent-core";
+import type { AgentMessage } from "openclaw/plugin-sdk/agent-harness-runtime";
 
 export type CodexContextProjection = {
   developerInstructionAddition?: string;

extensions/codex/src/app-server/event-projector.ts

@@ -1,4 +1,3 @@
-import type { AgentMessage } from "@mariozechner/pi-agent-core";
 import type { AssistantMessage, Usage } from "@mariozechner/pi-ai";
 import { SessionManager } from "@mariozechner/pi-coding-agent";
 import {
@@ -13,6 +12,7 @@ import {
   runAgentHarnessAfterCompactionHook,
   runAgentHarnessBeforeCompactionHook,
   TOOL_PROGRESS_OUTPUT_MAX_CHARS,
+  type AgentMessage,
   type EmbeddedRunAttemptParams,
   type EmbeddedRunAttemptResult,
   type MessagingToolSend,

extensions/codex/src/app-server/run-attempt.ts

@@ -1,5 +1,4 @@
 import fs from "node:fs/promises";
-import type { AgentMessage } from "@mariozechner/pi-agent-core";
 import { SessionManager } from "@mariozechner/pi-coding-agent";
 import {
   assembleHarnessContextEngine,
@@ -29,6 +28,7 @@ import {
   registerNativeHookRelay,
   setActiveEmbeddedRun,
   supportsModelTools,
+  type AgentMessage,
   type EmbeddedRunAttemptParams,
   type EmbeddedRunAttemptResult,
   type NativeHookRelayEvent,

extensions/codex/src/app-server/transcript-mirror.ts

@@ -1,11 +1,11 @@
 import fs from "node:fs/promises";
 import path from "node:path";
-import type { AgentMessage } from "@mariozechner/pi-agent-core";
 import { SessionManager } from "@mariozechner/pi-coding-agent";
 import {
   acquireSessionWriteLock,
   emitSessionTranscriptUpdate,
   runAgentHarnessBeforeMessageWriteHook,
+  type AgentMessage,
 } from "openclaw/plugin-sdk/agent-harness-runtime";
 
 export async function mirrorCodexAppServerTranscript(params: {