diff --git a/extensions/cerebras/api.ts b/extensions/cerebras/api.ts
index a5cb771c9d8c..e53a96f762ce 100644
--- a/extensions/cerebras/api.ts
+++ b/extensions/cerebras/api.ts
@@ -1,3 +1,6 @@
+/**
+ * Public Cerebras provider plugin API exports.
+ */
 export {
   buildCerebrasModelDefinition,
   CEREBRAS_BASE_URL,
diff --git a/extensions/cerebras/index.ts b/extensions/cerebras/index.ts
index 99fa2fe83403..514a08b9d5ab 100644
--- a/extensions/cerebras/index.ts
+++ b/extensions/cerebras/index.ts
@@ -1,3 +1,6 @@
+/**
+ * Cerebras provider plugin entrypoint.
+ */
 import { defineSingleProviderPluginEntry } from "openclaw/plugin-sdk/provider-entry";
 import { applyCerebrasConfig, CEREBRAS_DEFAULT_MODEL_REF } from "./onboard.js";
 import { buildCerebrasProvider } from "./provider-catalog.js";
diff --git a/extensions/cerebras/models.ts b/extensions/cerebras/models.ts
index 8c5ecc29ad26..58de3addf274 100644
--- a/extensions/cerebras/models.ts
+++ b/extensions/cerebras/models.ts
@@ -1,12 +1,18 @@
+/**
+ * Cerebras model catalog helpers derived from the plugin manifest.
+ */
 import { buildManifestModelProviderConfig } from "openclaw/plugin-sdk/provider-catalog-shared";
 import type { ModelDefinitionConfig } from "openclaw/plugin-sdk/provider-model-shared";
 import manifest from "./openclaw.plugin.json" with { type: "json" };
 
 const CEREBRAS_MANIFEST_CATALOG = manifest.modelCatalog.providers.cerebras;
 
+/** Base URL for Cerebras OpenAI-compatible inference. */
 export const CEREBRAS_BASE_URL = CEREBRAS_MANIFEST_CATALOG.baseUrl;
+/** Cerebras model catalog entries from the plugin manifest. */
 export const CEREBRAS_MODEL_CATALOG = CEREBRAS_MANIFEST_CATALOG.models;
 
+/** Builds normalized Cerebras catalog model definitions. */
 export function buildCerebrasCatalogModels(): ModelDefinitionConfig[] {
   return buildManifestModelProviderConfig({
     providerId: "cerebras",
@@ -14,6 +20,7 @@ export function buildCerebrasCatalogModels(): ModelDefinitionConfig[] {
   }).models;
 }
 
+/** Builds one normalized Cerebras model definition from a manifest entry. */
 export function buildCerebrasModelDefinition(
   model: (typeof CEREBRAS_MODEL_CATALOG)[number],
 ): ModelDefinitionConfig {
diff --git a/extensions/cerebras/onboard.ts b/extensions/cerebras/onboard.ts
index 92a5b4afb0f7..23b855c3f83e 100644
--- a/extensions/cerebras/onboard.ts
+++ b/extensions/cerebras/onboard.ts
@@ -1,3 +1,6 @@
+/**
+ * Cerebras onboarding config helpers.
+ */
 import {
   createModelCatalogPresetAppliers,
   type OpenClawConfig,
@@ -8,6 +11,7 @@ import {
   CEREBRAS_MODEL_CATALOG,
 } from "./models.js";
 
+/** Default Cerebras model reference used after onboarding. */
 export const CEREBRAS_DEFAULT_MODEL_REF = "cerebras/zai-glm-4.7";
 
 const cerebrasPresetAppliers = createModelCatalogPresetAppliers({
@@ -21,6 +25,7 @@ const cerebrasPresetAppliers = createModelCatalogPresetAppliers({
   }),
 });
 
+/** Applies Cerebras provider/catalog config and default model aliases. */
 export function applyCerebrasConfig(cfg: OpenClawConfig): OpenClawConfig {
   return cerebrasPresetAppliers.applyConfig(cfg);
 }
diff --git a/extensions/cerebras/provider-catalog.ts b/extensions/cerebras/provider-catalog.ts
index ba670c0998a3..41ff17dd96b9 100644
--- a/extensions/cerebras/provider-catalog.ts
+++ b/extensions/cerebras/provider-catalog.ts
@@ -1,6 +1,10 @@
+/**
+ * Cerebras model provider builder.
+ */
 import type { ModelProviderConfig } from "openclaw/plugin-sdk/provider-model-shared";
 import { buildCerebrasCatalogModels, CEREBRAS_BASE_URL } from "./models.js";
 
+/** Builds the Cerebras OpenAI-compatible model provider config. */
 export function buildCerebrasProvider(): ModelProviderConfig {
   return {
     baseUrl: CEREBRAS_BASE_URL,
diff --git a/extensions/chutes/api.ts b/extensions/chutes/api.ts
index 22bb3853697e..0e8c172ddf02 100644
--- a/extensions/chutes/api.ts
+++ b/extensions/chutes/api.ts
@@ -1,3 +1,6 @@
+/**
+ * Public Chutes provider plugin API exports.
+ */
 export {
   buildChutesModelDefinition,
   CHUTES_BASE_URL,
diff --git a/extensions/chutes/index.ts b/extensions/chutes/index.ts
index 7147a7c3c6f2..42be87dba775 100644
--- a/extensions/chutes/index.ts
+++ b/extensions/chutes/index.ts
@@ -1,3 +1,6 @@
+/**
+ * Chutes provider plugin entrypoint with OAuth and API-key auth methods.
+ */
 import { definePluginEntry } from "openclaw/plugin-sdk/plugin-entry";
 import {
   resolveOAuthApiKeyMarker,
diff --git a/extensions/chutes/model-discovery-env.ts b/extensions/chutes/model-discovery-env.ts
index ffd30978f5b4..52c98fd5079e 100644
--- a/extensions/chutes/model-discovery-env.ts
+++ b/extensions/chutes/model-discovery-env.ts
@@ -1,3 +1,7 @@
+/**
+ * Environment helper for Chutes model discovery behavior in tests.
+ */
+/** Returns whether dynamic Chutes model discovery should use test behavior. */
 export function isChutesModelDiscoveryTestEnvironment(
   env: Record<string, string | undefined> = process.env,
 ): boolean {
diff --git a/extensions/chutes/models.ts b/extensions/chutes/models.ts
index 491572fcc108..747039dba0d0 100644
--- a/extensions/chutes/models.ts
+++ b/extensions/chutes/models.ts
@@ -1,3 +1,6 @@
+/**
+ * Chutes model catalog, static model definitions, and dynamic model discovery.
+ */
 import type { ModelDefinitionConfig } from "openclaw/plugin-sdk/provider-model-shared";
 import { createSubsystemLogger } from "openclaw/plugin-sdk/runtime-env";
 import {
@@ -13,13 +16,17 @@ import { isChutesModelDiscoveryTestEnvironment } from "./model-discovery-env.js"
 
 const log = createSubsystemLogger("chutes-models");
 
+/** Base URL for Chutes OpenAI-compatible inference. */
 export const CHUTES_BASE_URL = "https://llm.chutes.ai/v1";
+/** Default Chutes model id used for onboarding. */
 export const CHUTES_DEFAULT_MODEL_ID = "zai-org/GLM-4.7-TEE";
+/** Default Chutes model ref used for onboarding. */
 export const CHUTES_DEFAULT_MODEL_REF = `chutes/${CHUTES_DEFAULT_MODEL_ID}`;
 
 const CHUTES_DEFAULT_CONTEXT_WINDOW = 128000;
 const CHUTES_DEFAULT_MAX_TOKENS = 4096;
 
+/** Bundled fallback Chutes model catalog. */
 export const CHUTES_MODEL_CATALOG: ModelDefinitionConfig[] = [
   {
     id: "Qwen/Qwen3-32B",
@@ -452,6 +459,7 @@ export const CHUTES_MODEL_CATALOG: ModelDefinitionConfig[] = [
   },
 ];
 
+/** Adds Chutes provider compat metadata to one model catalog entry. */
 export function buildChutesModelDefinition(
   model: (typeof CHUTES_MODEL_CATALOG)[number],
 ): ModelDefinitionConfig {
@@ -491,6 +499,7 @@ interface CacheEntry {
 
 const modelCache = new Map<string, CacheEntry>();
 
+/** Clears the dynamic Chutes model discovery cache for tests. */
 export function clearChutesModelCacheForTests(): void {
   modelCache.clear();
 }
@@ -521,6 +530,7 @@ function cacheAndReturn(
   return models;
 }
 
+/** Discovers Chutes models dynamically, falling back to the bundled static catalog. */
 export async function discoverChutesModels(accessToken?: string): Promise<ModelDefinitionConfig[]> {
   const trimmedKey = normalizeOptionalString(accessToken) ?? "";
   const now = Date.now();
diff --git a/extensions/chutes/oauth.ts b/extensions/chutes/oauth.ts
index bf38c1d05cd9..c36d5c019707 100644
--- a/extensions/chutes/oauth.ts
+++ b/extensions/chutes/oauth.ts
@@ -1,3 +1,6 @@
+/**
+ * Chutes OAuth PKCE login flow.
+ */
 import { randomBytes } from "node:crypto";
 import { resolveExpiresAtMsFromDurationSeconds } from "openclaw/plugin-sdk/number-runtime";
 import { generatePkceVerifierChallenge, toFormUrlEncoded } from "openclaw/plugin-sdk/provider-auth";
@@ -181,6 +184,7 @@ async function exchangeChutesCodeForTokens(params: {
   } as ChutesStoredOAuth;
 }
 
+/** Runs Chutes OAuth and returns refreshable stored credentials. */
 export async function loginChutes(params: {
   app: ChutesOAuthAppConfig;
   manual?: boolean;
diff --git a/extensions/chutes/onboard.ts b/extensions/chutes/onboard.ts
index 659437aa69d2..968767b07089 100644
--- a/extensions/chutes/onboard.ts
+++ b/extensions/chutes/onboard.ts
@@ -1,3 +1,6 @@
+/**
+ * Chutes onboarding config helpers for OAuth and API-key setup.
+ */
 import {
   applyAgentDefaultModelPrimary,
   applyProviderConfigWithModelCatalogPreset,
@@ -58,6 +61,7 @@ export function applyChutesConfig(cfg: OpenClawConfig): OpenClawConfig {
   };
 }
 
+/** Applies Chutes provider config and sets the default model for API-key auth. */
 export function applyChutesApiKeyConfig(cfg: OpenClawConfig): OpenClawConfig {
   return applyAgentDefaultModelPrimary(applyChutesProviderConfig(cfg), CHUTES_DEFAULT_MODEL_REF);
 }
diff --git a/extensions/chutes/provider-catalog.ts b/extensions/chutes/provider-catalog.ts
index 3f28345fa420..5ad33d89d78e 100644
--- a/extensions/chutes/provider-catalog.ts
+++ b/extensions/chutes/provider-catalog.ts
@@ -1,3 +1,6 @@
+/**
+ * Chutes provider builders for static and dynamically discovered catalogs.
+ */
 import type { ModelProviderConfig } from "openclaw/plugin-sdk/provider-model-shared";
 import {
   CHUTES_BASE_URL,
@@ -6,6 +9,7 @@ import {
   discoverChutesModels,
 } from "./models.js";
 
+/** Builds the static Chutes provider catalog from bundled model metadata. */
 export function buildStaticChutesProvider(): ModelProviderConfig {
   return {
     baseUrl: CHUTES_BASE_URL,