diff --git a/src/agents/embedded-agent-block-chunker.ts b/src/agents/embedded-agent-block-chunker.ts
index 36d00fa9694e..e7a0e3ef3cd9 100644
--- a/src/agents/embedded-agent-block-chunker.ts
+++ b/src/agents/embedded-agent-block-chunker.ts
@@ -1,3 +1,6 @@
+/**
+ * Splits streamed embedded-agent replies into Markdown-safe message chunks.
+ */
 import type { FenceSpan } from "../../packages/markdown-core/src/fences.js";
 import {
   findFenceSpanAt,
@@ -116,6 +119,7 @@ export class EmbeddedBlockChunker {
     this.#chunking = chunking;
   }
 
+  /** Add streamed text to the pending chunk buffer. */
   append(text: string) {
     if (!text) {
       return;
@@ -123,18 +127,22 @@ export class EmbeddedBlockChunker {
     this.#buffer += text;
   }
 
+  /** Clear any buffered reply text without emitting it. */
   reset() {
     this.#buffer = "";
   }
 
+  /** Return the currently buffered text for tests and flush logic. */
   get bufferedText() {
     return this.#buffer;
   }
 
+  /** Return true when there is pending text to drain. */
   hasBuffered(): boolean {
     return this.#buffer.length > 0;
   }
 
+  /** Emit safe chunks according to size and Markdown fence constraints. */
   drain(params: { force: boolean; emit: (chunk: string) => void }) {
     // KNOWN: We cannot split inside fenced code blocks (Markdown breaks + UI glitches).
     // When forced (maxChars), we close + reopen the fence to keep Markdown valid.
diff --git a/src/agents/embedded-agent-error-observation.ts b/src/agents/embedded-agent-error-observation.ts
index 01e5678c16ac..38601cd99c6c 100644
--- a/src/agents/embedded-agent-error-observation.ts
+++ b/src/agents/embedded-agent-error-observation.ts
@@ -1,3 +1,6 @@
+/**
+ * Builds structured observations for embedded-agent API/text failures.
+ */
 import { normalizeOptionalString } from "@openclaw/normalization-core/string-coerce";
 import { readLoggingConfig } from "../logging/config.js";
 import { redactIdentifier } from "../logging/redact-identifier.js";
diff --git a/src/agents/embedded-agent-helpers/bootstrap.ts b/src/agents/embedded-agent-helpers/bootstrap.ts
index 400966b9d34a..781ca35c9837 100644
--- a/src/agents/embedded-agent-helpers/bootstrap.ts
+++ b/src/agents/embedded-agent-helpers/bootstrap.ts
@@ -1,3 +1,6 @@
+/**
+ * Builds and sanitizes bootstrap context inserted into embedded-agent sessions.
+ */
 import fs from "node:fs/promises";
 import path from "node:path";
 import { normalizeOptionalString } from "@openclaw/normalization-core/string-coerce";
diff --git a/src/agents/embedded-agent-helpers/errors.ts b/src/agents/embedded-agent-helpers/errors.ts
index 940e4cc39505..eaa8e6d732f4 100644
--- a/src/agents/embedded-agent-helpers/errors.ts
+++ b/src/agents/embedded-agent-helpers/errors.ts
@@ -1,3 +1,6 @@
+/**
+ * Classifies provider/runtime failures and formats assistant-facing error text.
+ */
 import {
   normalizeLowercaseStringOrEmpty,
   normalizeOptionalLowercaseString,
@@ -75,6 +78,7 @@ export const GENERIC_ASSISTANT_ERROR_TEXT = "LLM request failed.";
 const PROVIDER_SCHEMA_REJECTION_USER_TEXT =
   "LLM request failed: provider rejected the request schema or tool payload.";
 
+/** Detect provider errors that require reasoning to stay enabled. */
 export function isReasoningConstraintErrorMessage(raw: string): boolean {
   if (!raw) {
     return false;
@@ -93,6 +97,7 @@ function hasRateLimitTpmHint(raw: string): boolean {
   return /\btpm\b/i.test(lower) || lower.includes("tokens per minute");
 }
 
+/** Detect explicit context-window overflow without confusing TPM rate limits. */
 export function isContextOverflowError(errorMessage?: string): boolean {
   if (!errorMessage) {
     return false;
diff --git a/src/agents/embedded-agent-helpers/failover-matches.ts b/src/agents/embedded-agent-helpers/failover-matches.ts
index 49952e3e1b2b..5f1ab842d61d 100644
--- a/src/agents/embedded-agent-helpers/failover-matches.ts
+++ b/src/agents/embedded-agent-helpers/failover-matches.ts
@@ -1,3 +1,6 @@
+/**
+ * Shared text-pattern matchers for failover, auth, billing, and rate-limit errors.
+ */
 import { normalizeLowercaseStringOrEmpty } from "@openclaw/normalization-core/string-coerce";
 
 type ErrorPattern = RegExp | string;
diff --git a/src/agents/embedded-agent-helpers/google.ts b/src/agents/embedded-agent-helpers/google.ts
index e3536a5442bb..c36fb218947f 100644
--- a/src/agents/embedded-agent-helpers/google.ts
+++ b/src/agents/embedded-agent-helpers/google.ts
@@ -1,3 +1,6 @@
+/**
+ * Google/Gemini-specific embedded-agent runtime helpers.
+ */
 import { isGemma4ModelId } from "../../shared/google-models.js";
 import { sanitizeGoogleTurnOrdering } from "./bootstrap.js";
 
diff --git a/src/agents/embedded-agent-helpers/images.ts b/src/agents/embedded-agent-helpers/images.ts
index b614bd52bfe2..213e5fafb362 100644
--- a/src/agents/embedded-agent-helpers/images.ts
+++ b/src/agents/embedded-agent-helpers/images.ts
@@ -1,3 +1,6 @@
+/**
+ * Sanitizes historical embedded-agent message images and empty content blocks.
+ */
 import type { ImageSanitizationLimits } from "../image-sanitization.js";
 import type { AgentMessage, AgentToolResult } from "../runtime/index.js";
 import type { ToolCallIdMode } from "../tool-call-id.js";
@@ -28,6 +31,7 @@ function ensureNonEmptyContent<T>(content: T[]): T[] {
   return [{ type: "text", text: EMPTY_CONTENT_PLACEHOLDER }] as T[];
 }
 
+/** Return true when an assistant turn contains no usable content blocks. */
 export function isEmptyAssistantMessageContent(
   message: Extract<AgentMessage, { role: "assistant" }>,
 ): boolean {
@@ -50,6 +54,7 @@ export function isEmptyAssistantMessageContent(
   });
 }
 
+/** Resize/remove unsafe image payloads while keeping transcript turns valid. */
 export async function sanitizeSessionMessagesImages(
   messages: AgentMessage[],
   label: string,
diff --git a/src/agents/embedded-agent-helpers/messaging-dedupe.ts b/src/agents/embedded-agent-helpers/messaging-dedupe.ts
index efdc39f47e77..76d6c64121ae 100644
--- a/src/agents/embedded-agent-helpers/messaging-dedupe.ts
+++ b/src/agents/embedded-agent-helpers/messaging-dedupe.ts
@@ -1,3 +1,6 @@
+/**
+ * Normalizes outbound message text to suppress duplicate send actions.
+ */
 import { normalizeLowercaseStringOrEmpty } from "@openclaw/normalization-core/string-coerce";
 
 const MIN_DUPLICATE_TEXT_LENGTH = 10;
@@ -17,6 +20,7 @@ export function normalizeTextForComparison(text: string): string {
     .trim();
 }
 
+/** Compare already-normalized message text against prior sends. */
 export function isMessagingToolDuplicateNormalized(
   normalized: string,
   normalizedSentTexts: string[],
@@ -41,6 +45,7 @@ export function isMessagingToolDuplicateNormalized(
   });
 }
 
+/** Return true when raw message text duplicates a prior sent message. */
 export function isMessagingToolDuplicate(text: string, sentTexts: string[]): boolean {
   if (sentTexts.length === 0) {
     return false;
diff --git a/src/agents/embedded-agent-helpers/openai.ts b/src/agents/embedded-agent-helpers/openai.ts
index bb184b21effd..7f9d5f993193 100644
--- a/src/agents/embedded-agent-helpers/openai.ts
+++ b/src/agents/embedded-agent-helpers/openai.ts
@@ -1,3 +1,6 @@
+/**
+ * Normalizes OpenAI Responses reasoning/tool-call history for safe replay.
+ */
 import { createHash } from "node:crypto";
 import type { AgentMessage } from "../runtime/index.js";
 
diff --git a/src/agents/embedded-agent-helpers/sanitize-user-facing-text.ts b/src/agents/embedded-agent-helpers/sanitize-user-facing-text.ts
index 4e255fac6f7e..7748e9e71e5f 100644
--- a/src/agents/embedded-agent-helpers/sanitize-user-facing-text.ts
+++ b/src/agents/embedded-agent-helpers/sanitize-user-facing-text.ts
@@ -1,3 +1,6 @@
+/**
+ * Converts raw provider/transport errors into concise user-facing copy.
+ */
 import {
   normalizeLowercaseStringOrEmpty,
   normalizeOptionalLowercaseString,
@@ -31,6 +34,7 @@ import {
   isTimeoutErrorMessage,
 } from "./failover-matches.js";
 
+/** Format the billing failure copy with optional provider/model context. */
 export function formatBillingErrorMessage(provider?: string, model?: string): string {
   const providerName = provider?.trim();
   const modelName = model?.trim();
diff --git a/src/agents/embedded-agent-helpers/thinking.ts b/src/agents/embedded-agent-helpers/thinking.ts
index 87478d111e0d..e6099c8310f8 100644
--- a/src/agents/embedded-agent-helpers/thinking.ts
+++ b/src/agents/embedded-agent-helpers/thinking.ts
@@ -1,3 +1,6 @@
+/**
+ * Resolves fallback thinking levels for providers that require reasoning.
+ */
 import { normalizeStringEntries } from "@openclaw/normalization-core/string-normalization";
 import { normalizeThinkLevel, type ThinkLevel } from "../../auto-reply/thinking.js";
 import { isReasoningConstraintErrorMessage } from "./errors.js";
@@ -20,6 +23,7 @@ function extractSupportedValues(raw: string): string[] {
   );
 }
 
+/** Pick a configured or provider-safe reasoning level for fallback attempts. */
 export function pickFallbackThinkingLevel(params: {
   message?: string;
   attempted: Set<ThinkLevel>;
diff --git a/src/agents/embedded-agent-helpers/turns.ts b/src/agents/embedded-agent-helpers/turns.ts
index 599a8735763c..13ce52680349 100644
--- a/src/agents/embedded-agent-helpers/turns.ts
+++ b/src/agents/embedded-agent-helpers/turns.ts
@@ -1,3 +1,6 @@
+/**
+ * Normalizes embedded-agent conversation turn ordering for provider contracts.
+ */
 import { normalizeOptionalString } from "@openclaw/normalization-core/string-coerce";
 import type { AgentMessage } from "../runtime/index.js";
 import { extractToolCallsFromAssistant, extractToolResultId } from "../tool-call-id.js";
@@ -349,6 +352,7 @@ export function validateGeminiTurns(messages: AgentMessage[]): AgentMessage[] {
   });
 }
 
+/** Merge adjacent user turns into a single provider-compatible user message. */
 export function mergeConsecutiveUserTurns(
   previous: Extract<AgentMessage, { role: "user" }>,
   current: Extract<AgentMessage, { role: "user" }>,
diff --git a/src/agents/embedded-agent-lsp.ts b/src/agents/embedded-agent-lsp.ts
index cdff49b046dc..8ed66d172f4f 100644
--- a/src/agents/embedded-agent-lsp.ts
+++ b/src/agents/embedded-agent-lsp.ts
@@ -1,3 +1,6 @@
+/**
+ * Loads bundle-provided LSP server config for embedded-agent sessions.
+ */
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import type { BundleLspServerConfig } from "../plugins/bundle-lsp.js";
 import { loadEnabledBundleLspConfig } from "../plugins/bundle-lsp.js";
@@ -7,6 +10,7 @@ type EmbeddedAgentLspConfig = {
   diagnostics: Array<{ pluginId: string; message: string }>;
 };
 
+/** Resolve enabled embedded-agent LSP servers and diagnostics. */
 export function loadEmbeddedAgentLspConfig(params: {
   workspaceDir: string;
   cfg?: OpenClawConfig;
diff --git a/src/agents/embedded-agent-messaging.ts b/src/agents/embedded-agent-messaging.ts
index 818678b89f63..0d98a50f6750 100644
--- a/src/agents/embedded-agent-messaging.ts
+++ b/src/agents/embedded-agent-messaging.ts
@@ -1,3 +1,6 @@
+/**
+ * Identifies messaging tools and send actions during embedded-agent runs.
+ */
 import { normalizeOptionalString } from "@openclaw/normalization-core/string-coerce";
 import { getChannelPlugin, normalizeChannelId } from "../channels/plugins/index.js";
 
@@ -10,12 +13,14 @@ const MESSAGE_TOOL_SEND_ACTIONS = new Set([
   "upload-file",
 ]);
 
+/** Return true when a message action sends or uploads user-visible content. */
 export function isMessageToolSendActionName(action: unknown): boolean {
   const normalized = normalizeOptionalString(action) ?? "";
   return MESSAGE_TOOL_SEND_ACTIONS.has(normalized);
 }
 
 // Provider docking: any plugin with `actions` opts into messaging tool handling.
+/** Return true for core or channel-plugin messaging tool names. */
 export function isMessagingTool(toolName: string): boolean {
   if (CORE_MESSAGING_TOOLS.has(toolName)) {
     return true;
@@ -24,6 +29,7 @@ export function isMessagingTool(toolName: string): boolean {
   return Boolean(providerId && getChannelPlugin(providerId)?.actions);
 }
 
+/** Return true when the specific tool invocation is an outbound send. */
 export function isMessagingToolSendAction(
   toolName: string,
   args: Record<string, unknown>,
diff --git a/src/agents/embedded-agent-messaging.types.ts b/src/agents/embedded-agent-messaging.types.ts
index 36f78d35f0ef..31683c1fb672 100644
--- a/src/agents/embedded-agent-messaging.types.ts
+++ b/src/agents/embedded-agent-messaging.types.ts
@@ -1,6 +1,8 @@
+/**
+ * Shared messaging-tool metadata types captured from embedded-agent runs.
+ */
 import type { ReplyPayload } from "../auto-reply/reply-payload.js";
 
-// Messaging tool metadata captured during embedded agent runs.
 export type MessagingToolSend = {
   tool: string;
   provider: string;
@@ -13,7 +15,6 @@ export type MessagingToolSend = {
   mediaUrls?: string[];
 };
 
-// Reply payload subset preserved for message-tool idempotency and delivery.
 export type MessagingToolSourceReplyPayload = Pick<
   ReplyPayload,
   | "audioAsVoice"