diff --git a/extensions/codex/src/app-server/session-history.ts b/extensions/codex/src/app-server/session-history.ts
index 619ab21abf4a..ddeda238a99e 100644
--- a/extensions/codex/src/app-server/session-history.ts
+++ b/extensions/codex/src/app-server/session-history.ts
@@ -1,3 +1,7 @@
+/**
+ * Reads OpenClaw session history for Codex transcript mirroring and sanitizes
+ * image payloads before replaying messages into the app-server projector.
+ */
 import fs from "node:fs/promises";
 import type { AgentMessage } from "openclaw/plugin-sdk/agent-harness-runtime";
 import type { SessionEntry } from "openclaw/plugin-sdk/agent-sessions";
@@ -17,6 +21,7 @@ function isMissingFileError(error: unknown): boolean {
   );
 }
 
+/** Returns sanitized session-context messages for a Codex mirrored session file. */
 export async function readCodexMirroredSessionHistoryMessages(
   sessionFile: string,
 ): Promise<AgentMessage[] | undefined> {
diff --git a/extensions/codex/src/app-server/shared-client.ts b/extensions/codex/src/app-server/shared-client.ts
index a5c8bc8557ed..c5b7cd0877b4 100644
--- a/extensions/codex/src/app-server/shared-client.ts
+++ b/extensions/codex/src/app-server/shared-client.ts
@@ -1,3 +1,7 @@
+/**
+ * Owns shared and isolated Codex app-server client startup, auth application,
+ * lease tracking, and teardown.
+ */
 import { resolveDefaultAgentDir } from "openclaw/plugin-sdk/agent-runtime";
 import {
   applyCodexAppServerAuthProfile,
@@ -142,12 +146,14 @@ async function resolveCodexAppServerClientStartContext(
   return { agentDir, usesNativeAuth, authProfileId, startOptions };
 }
 
+/** Gets or starts a shared Codex app-server client without retaining a lease. */
 export async function getSharedCodexAppServerClient(
   options?: CodexAppServerClientOptions,
 ): Promise<CodexAppServerClient> {
   return (await acquireSharedCodexAppServerClient(options)).client;
 }
 
+/** Gets or starts a shared Codex app-server client and records a release lease. */
 export async function getLeasedSharedCodexAppServerClient(
   options?: CodexAppServerClientOptions,
 ): Promise<CodexAppServerClient> {
@@ -159,6 +165,7 @@ export async function getLeasedSharedCodexAppServerClient(
   return acquired.client;
 }
 
+/** Releases one outstanding lease for a shared Codex app-server client. */
 export function releaseLeasedSharedCodexAppServerClient(client: CodexAppServerClient): boolean {
   const state = getSharedCodexAppServerClientState();
   const releases = state.leasedReleases.get(client);
@@ -260,6 +267,7 @@ async function acquireSharedCodexAppServerClient(
   }
 }
 
+/** Starts a non-shared Codex app-server client owned entirely by the caller. */
 export async function createIsolatedCodexAppServerClient(
   options?: CodexAppServerClientOptions,
 ): Promise<CodexAppServerClient> {
@@ -284,6 +292,7 @@ export async function createIsolatedCodexAppServerClient(
   }
 }
 
+/** Clears and closes all shared clients for deterministic tests. */
 export function resetSharedCodexAppServerClientForTests(): void {
   const state = getSharedCodexAppServerClientState();
   const clients = collectSharedClients(state);
@@ -294,6 +303,7 @@ export function resetSharedCodexAppServerClientForTests(): void {
   }
 }
 
+/** Clears and closes all shared clients. */
 export function clearSharedCodexAppServerClient(): void {
   const state = getSharedCodexAppServerClientState();
   const clients = collectSharedClients(state);
@@ -303,6 +313,7 @@ export function clearSharedCodexAppServerClient(): void {
   }
 }
 
+/** Clears and closes the shared entry only if it still owns the supplied client. */
 export function clearSharedCodexAppServerClientIfCurrent(
   client: CodexAppServerClient | undefined,
 ): boolean {
@@ -320,6 +331,7 @@ export function clearSharedCodexAppServerClientIfCurrent(
   return false;
 }
 
+/** Detaches the shared entry without closing the client when it still matches. */
 export function detachSharedCodexAppServerClientIfCurrent(
   client: CodexAppServerClient | undefined,
 ): boolean {
@@ -336,6 +348,7 @@ export function detachSharedCodexAppServerClientIfCurrent(
   return false;
 }
 
+/** Retains the matching shared client and returns a release callback. */
 export function retainSharedCodexAppServerClientIfCurrent(
   client: CodexAppServerClient | undefined,
 ): (() => void) | undefined {
@@ -351,6 +364,7 @@ export function retainSharedCodexAppServerClientIfCurrent(
   return undefined;
 }
 
+/** Marks a matching shared client to close after active leases/acquires drain. */
 export function retireSharedCodexAppServerClientIfCurrent(
   client: CodexAppServerClient | undefined,
 ): { activeLeases: number; closed: boolean } | undefined {
@@ -373,6 +387,7 @@ export function retireSharedCodexAppServerClientIfCurrent(
   return undefined;
 }
 
+/** Clears a matching shared client and waits for its process to exit. */
 export async function clearSharedCodexAppServerClientIfCurrentAndWait(
   client: CodexAppServerClient | undefined,
   options?: {
@@ -394,6 +409,7 @@ export async function clearSharedCodexAppServerClientIfCurrentAndWait(
   return false;
 }
 
+/** Clears all shared clients and waits for their processes to exit. */
 export async function clearSharedCodexAppServerClientAndWait(options?: {
   exitTimeoutMs?: number;
   forceKillDelayMs?: number;
@@ -433,6 +449,7 @@ function clearSharedClientEntryIfCurrent(key: string, client: CodexAppServerClie
   }
 }
 
+/** Clears a matching shared client only when no lease or acquire currently claims it. */
 export function clearSharedCodexAppServerClientIfCurrentAndUnclaimed(
   client: CodexAppServerClient | undefined,
 ): { found: boolean; closed: boolean; activeLeases: number; pendingAcquires: number } {
diff --git a/extensions/codex/src/app-server/test-support.ts b/extensions/codex/src/app-server/test-support.ts
index 3dbd00703590..9075a7e9e238 100644
--- a/extensions/codex/src/app-server/test-support.ts
+++ b/extensions/codex/src/app-server/test-support.ts
@@ -1,9 +1,14 @@
+/**
+ * Shared Codex app-server test helpers for model fixtures and in-memory client
+ * transports.
+ */
 import { EventEmitter } from "node:events";
 import { PassThrough, Writable } from "node:stream";
 import type { Model } from "openclaw/plugin-sdk/llm";
 import { vi } from "vitest";
 import { CodexAppServerClient } from "./client.js";
 
+/** Builds a representative Codex-capable model fixture for app-server tests. */
 export function createCodexTestModel(provider = "openai", input = ["text"]): Model {
   return {
     id: "gpt-5.4-codex",
@@ -18,6 +23,7 @@ export function createCodexTestModel(provider = "openai", input = ["text"]): Mod
   } as Model;
 }
 
+/** Creates an in-memory Codex app-server client harness with writable stdout frames. */
 export function createClientHarness() {
   const stdout = new PassThrough();
   const writes: string[] = [];
diff --git a/extensions/codex/src/app-server/user-input-bridge.ts b/extensions/codex/src/app-server/user-input-bridge.ts
index 5349905db14b..32c02df997c6 100644
--- a/extensions/codex/src/app-server/user-input-bridge.ts
+++ b/extensions/codex/src/app-server/user-input-bridge.ts
@@ -1,3 +1,7 @@
+/**
+ * Bridges Codex item/tool user-input requests to OpenClaw messaging prompts and
+ * turns replies into app-server answer payloads.
+ */
 import {
   embeddedAgentLog,
   type EmbeddedRunAttemptParams,
@@ -44,6 +48,7 @@ type CodexUserInputBridge = {
   cancelPending: () => void;
 };
 
+/** Creates a per-turn bridge for pending Codex user-input requests. */
 export function createCodexUserInputBridge(params: {
   paramsForRun: EmbeddedRunAttemptParams;
   threadId: string;
@@ -241,6 +246,8 @@ function formatUserInputPrompt(questions: UserInputQuestion[]): string {
 }
 
 function buildUserInputResponse(questions: UserInputQuestion[], inputText: string): JsonObject {
+  // Multi-question replies may use "header: answer" or numbered lines. Keep the
+  // parser permissive so chat-channel replies remain ergonomic.
   const answers: JsonObject = {};
   if (questions.length === 1) {
     const question = questions[0];