diff --git a/extensions/voice-call/src/manager/lifecycle.ts b/extensions/voice-call/src/manager/lifecycle.ts
index 93bd6242539a..952c0ccb54ad 100644
--- a/extensions/voice-call/src/manager/lifecycle.ts
+++ b/extensions/voice-call/src/manager/lifecycle.ts
@@ -4,12 +4,15 @@ import { transitionState } from "./state.js";
 import { persistCallRecord } from "./store.js";
 import { clearMaxDurationTimer, rejectTranscriptWaiter } from "./timers.js";
 
+// Shared call finalization path for manager and webhook lifecycle exits.
+
 type CallLifecycleContext = Pick<
   CallManagerContext,
   "activeCalls" | "providerCallIdMap" | "storePath"
 > &
   Partial<Pick<CallManagerContext, "transcriptWaiters" | "maxDurationTimers">>;
 
+/** Remove a provider-call mapping only when it still points at this call. */
 function removeProviderCallMapping(
   providerCallIdMap: Map<string, string>,
   call: Pick<CallRecord, "callId" | "providerCallId">,
@@ -23,6 +26,7 @@ function removeProviderCallMapping(
   }
 }
 
+/** Persist terminal state, clean timers/waiters, and remove active call indexes. */
 export function finalizeCall(params: {
   ctx: CallLifecycleContext;
   call: CallRecord;
diff --git a/extensions/voice-call/src/manager/lookup.ts b/extensions/voice-call/src/manager/lookup.ts
index 1d3856ce5ff5..deefac593ba8 100644
--- a/extensions/voice-call/src/manager/lookup.ts
+++ b/extensions/voice-call/src/manager/lookup.ts
@@ -1,5 +1,8 @@
 import type { CallId, CallRecord } from "../types.js";
 
+// Lookup helpers for active calls by internal or provider call ids.
+
+/** Resolve an active call from provider call id with map lookup plus stale-map fallback scan. */
 export function getCallByProviderCallId(params: {
   activeCalls: Map<CallId, CallRecord>;
   providerCallIdMap: Map<string, CallId>;
@@ -18,6 +21,7 @@ export function getCallByProviderCallId(params: {
   return undefined;
 }
 
+/** Resolve an active call by internal call id or provider call id. */
 export function findCall(params: {
   activeCalls: Map<CallId, CallRecord>;
   providerCallIdMap: Map<string, CallId>;
diff --git a/extensions/voice-call/src/manager/store.ts b/extensions/voice-call/src/manager/store.ts
index 7e9e5a34e5d6..695260a4601c 100644
--- a/extensions/voice-call/src/manager/store.ts
+++ b/extensions/voice-call/src/manager/store.ts
@@ -4,16 +4,25 @@ import type { PluginStateSyncKeyedStore } from "openclaw/plugin-sdk/plugin-state
 import { getOptionalVoiceCallStateRuntime } from "../runtime-state.js";
 import { CallRecordSchema, TerminalStates, type CallId, type CallRecord } from "../types.js";
 
+// Persistent voice-call event store backed by plugin state chunk records.
+
+/** Plugin state namespace for call record event metadata. */
 export const CALL_RECORD_EVENTS_NAMESPACE = "call-record-events";
+/** Plugin state namespace for base64 call record event chunks. */
 export const CALL_RECORD_EVENT_CHUNKS_NAMESPACE = "call-record-event-chunks";
+/** Maximum retained call record events. */
 export const MAX_CALL_RECORD_EVENTS = 1000;
+/** Extra metadata entries retained so pruning can safely trim oldest rows. */
 export const CALL_RECORD_EVENT_META_MAX_ENTRIES = MAX_CALL_RECORD_EVENTS + 100;
+/** Maximum chunks allowed for one persisted call record event. */
 export const MAX_CHUNKS_PER_CALL_RECORD_EVENT = 48;
 export const CALL_RECORD_CHUNK_MAX_ENTRIES =
   MAX_CALL_RECORD_EVENTS * MAX_CHUNKS_PER_CALL_RECORD_EVENT + MAX_CHUNKS_PER_CALL_RECORD_EVENT;
+/** Raw UTF-8 bytes stored per call record chunk before base64 encoding. */
 export const RAW_CALL_RECORD_CHUNK_BYTES = 47 * 1024;
 let callRecordEventSequence = 0;
 
+/** Metadata row for a chunked call record event. */
 type CallRecordEventMeta = {
   chunkCount: number;
   byteLength: number;
@@ -21,11 +30,13 @@ type CallRecordEventMeta = {
   sequence?: number;
 };
 
+/** One base64 chunk for a serialized call record event. */
 type CallRecordEventChunk = {
   index: number;
   dataBase64: string;
 };
 
+/** Call record plus stable ordering metadata read from persistence. */
 export type PersistedCallRecord = {
   call: CallRecord;
   persistedAt: number;
@@ -33,19 +44,23 @@ export type PersistedCallRecord = {
   orderKey: string;
 };
 
+/** Pair of plugin state stores used for call record events. */
 type CallRecordStateStores = {
   events: PluginStateSyncKeyedStore<CallRecordEventMeta>;
   chunks: PluginStateSyncKeyedStore<CallRecordEventChunk>;
 };
 
+/** Return the pre-SQLite JSONL call log path for migration/compat checks. */
 export function resolveVoiceCallLegacyCallLogPath(storePath: string): string {
   return path.join(storePath, "calls.jsonl");
 }
 
+/** Build env for plugin state stores rooted at the voice-call store path. */
 function resolvePluginStateEnv(storePath: string): NodeJS.ProcessEnv {
   return { ...process.env, OPENCLAW_STATE_DIR: storePath };
 }
 
+/** Open the plugin state stores when the runtime is available. */
 function createCallRecordStateStores(storePath: string): CallRecordStateStores | null {
   const runtime = getOptionalVoiceCallStateRuntime();
   if (!runtime) {
@@ -66,6 +81,7 @@ function createCallRecordStateStores(storePath: string): CallRecordStateStores |
   };
 }
 
+/** Open call stores and log failures instead of breaking restore paths. */
 function tryCreateCallRecordStateStores(storePath: string): CallRecordStateStores | null {
   try {
     return createCallRecordStateStores(storePath);
@@ -75,29 +91,35 @@ function tryCreateCallRecordStateStores(storePath: string): CallRecordStateStore
   }
 }
 
+/** Build the stable storage key for one chunk of an event. */
 function buildChunkKey(eventKey: string, index: number): string {
   return `${eventKey}:chunk:${String(index).padStart(4, "0")}`;
 }
 
+/** Build a deterministic key for one legacy JSONL line. */
 export function buildVoiceCallLegacyJsonlEventKey(line: string, index: number): string {
   return `jsonl:${String(index).padStart(8, "0")}:${createHash("sha256").update(line).digest("hex")}`;
 }
 
+/** Allocate monotonic ordering metadata for newly persisted call records. */
 function nextCallRecordOrder(): { persistedAt: number; sequence: number } {
   const sequence = callRecordEventSequence;
   callRecordEventSequence = (callRecordEventSequence + 1) % 1_000_000;
   return { persistedAt: Date.now(), sequence };
 }
 
+/** Build a unique event key that preserves timestamp and sequence ordering. */
 function buildNewEventKey(order: { persistedAt: number; sequence: number }): string {
   return `event:${order.persistedAt.toString(36)}:${String(order.sequence).padStart(6, "0")}:${randomUUID()}`;
 }
 
+/** Recover the sequence segment from newer event keys. */
 function parseEventKeySequence(key: string): number {
   const match = /^event:[^:]+:(\d+):/.exec(key);
   return match ? Number.parseInt(match[1], 10) : 0;
 }
 
+/** Parse a stored call record line from v2 envelope or legacy raw-call JSON. */
 export function parseVoiceCallRecordLine(line: string, sequence = 0): PersistedCallRecord | null {
   if (!line.trim()) {
     return null;
@@ -135,6 +157,7 @@ export function parseVoiceCallRecordLine(line: string, sequence = 0): PersistedC
   }
 }
 
+/** Count storage chunks needed for a call record. */
 function countCallRecordChunks(call: CallRecord): number {
   return Math.max(
     1,
@@ -142,6 +165,7 @@ function countCallRecordChunks(call: CallRecord): number {
   );
 }
 
+/** Truncate oversized call records to fit the bounded plugin state chunk budget. */
 export function prepareVoiceCallRecordForStorage(call: CallRecord): CallRecord {
   if (countCallRecordChunks(call) <= MAX_CHUNKS_PER_CALL_RECORD_EVENT) {
     return call;
@@ -180,6 +204,7 @@ export function prepareVoiceCallRecordForStorage(call: CallRecord): CallRecord {
   return call;
 }
 
+/** Register a serialized call record event and its chunks, then prune old events. */
 function registerCallRecordEvent(
   stores: CallRecordStateStores,
   eventKey: string,
@@ -213,6 +238,7 @@ function registerCallRecordEvent(
   pruneCallRecordEvents(stores);
 }
 
+/** Delete metadata and all chunk rows for one call record event. */
 function deleteCallRecordEventRows(stores: CallRecordStateStores, eventKey: string): void {
   const meta = stores.events.lookup(eventKey);
   stores.events.delete(eventKey);
@@ -224,6 +250,7 @@ function deleteCallRecordEventRows(stores: CallRecordStateStores, eventKey: stri
   }
 }
 
+/** Keep only the newest bounded call record events. */
 function pruneCallRecordEvents(stores: CallRecordStateStores): void {
   const rows = stores.events.entries();
   if (rows.length <= MAX_CALL_RECORD_EVENTS) {
@@ -235,6 +262,7 @@ function pruneCallRecordEvents(stores: CallRecordStateStores): void {
   }
 }
 
+/** Read and reassemble one chunked call record event. */
 function readCallRecordEvent(stores: CallRecordStateStores, eventKey: string): CallRecord | null {
   const meta = stores.events.lookup(eventKey);
   if (!meta) {
@@ -252,6 +280,7 @@ function readCallRecordEvent(stores: CallRecordStateStores, eventKey: string): C
   return parseVoiceCallRecordLine(serialized)?.call ?? null;
 }
 
+/** Read all persisted call records in stable persisted order. */
 function readCallRecordEvents(stores: CallRecordStateStores): CallRecord[] {
   const sqliteCalls: PersistedCallRecord[] = stores.events
     .entries()
@@ -278,6 +307,7 @@ function readCallRecordEvents(stores: CallRecordStateStores): CallRecord[] {
     .map((entry) => entry.call);
 }
 
+/** Persist one call record event to plugin state. */
 export function persistCallRecord(storePath: string, call: CallRecord): void {
   try {
     const stores = createCallRecordStateStores(storePath);
@@ -292,10 +322,12 @@ export function persistCallRecord(storePath: string, call: CallRecord): void {
   }
 }
 
+/** Test hook for older async persistence call sites. */
 export async function flushPendingCallRecordWritesForTest(): Promise<void> {
   await Promise.resolve();
 }
 
+/** Restore nonterminal active calls and provider/event indexes from persisted records. */
 export function loadActiveCallsFromStore(storePath: string): {
   activeCalls: Map<CallId, CallRecord>;
   providerCallIdMap: Map<string, CallId>;
@@ -343,6 +375,7 @@ export function loadActiveCallsFromStore(storePath: string): {
   return { activeCalls, providerCallIdMap, processedEventIds, rejectedProviderCallIds };
 }
 
+/** Return the newest persisted call history rows up to the requested limit. */
 export async function getCallHistoryFromStore(
   storePath: string,
   limit = 50,
diff --git a/extensions/voice-call/src/manager/timer-delays.ts b/extensions/voice-call/src/manager/timer-delays.ts
index 3d279b42ea9b..fe0b536e75a2 100644
--- a/extensions/voice-call/src/manager/timer-delays.ts
+++ b/extensions/voice-call/src/manager/timer-delays.ts
@@ -1,5 +1,8 @@
 import { MAX_TIMER_TIMEOUT_MS, resolveTimerTimeoutMs } from "openclaw/plugin-sdk/number-runtime";
 
+// Timer delay normalization helpers for voice-call lifecycle timers.
+
+/** Convert seconds to a safe timeout delay in milliseconds. */
 export function resolveVoiceCallSecondsTimerDelayMs(seconds: number, minMs = 1): number {
   if (!Number.isFinite(seconds)) {
     return resolveTimerTimeoutMs(MAX_TIMER_TIMEOUT_MS, MAX_TIMER_TIMEOUT_MS, minMs);
@@ -12,6 +15,7 @@ export function resolveVoiceCallSecondsTimerDelayMs(seconds: number, minMs = 1):
   );
 }
 
+/** Normalize a millisecond timeout delay with fallback behavior. */
 export function resolveVoiceCallTimerDelayMs(timeoutMs: number, fallbackMs = 1): number {
   return resolveTimerTimeoutMs(timeoutMs, fallbackMs);
 }
diff --git a/extensions/voice-call/src/manager/timers.ts b/extensions/voice-call/src/manager/timers.ts
index 763cc53fed01..3c02516de7e0 100644
--- a/extensions/voice-call/src/manager/timers.ts
+++ b/extensions/voice-call/src/manager/timers.ts
@@ -6,6 +6,8 @@ import {
   resolveVoiceCallTimerDelayMs,
 } from "./timer-delays.js";
 
+// Max-duration and transcript-waiter timers for active voice calls.
+
 type TimerContext = Pick<
   CallManagerContext,
   "activeCalls" | "maxDurationTimers" | "config" | "storePath" | "transcriptWaiters"
@@ -16,6 +18,7 @@ type MaxDurationTimerContext = Pick<
 >;
 type TranscriptWaiterContext = Pick<TimerContext, "transcriptWaiters">;
 
+/** Clear and forget the max-duration timer for a call. */
 export function clearMaxDurationTimer(
   ctx: Pick<MaxDurationTimerContext, "maxDurationTimers">,
   callId: CallId,
@@ -27,6 +30,7 @@ export function clearMaxDurationTimer(
   }
 }
 
+/** Start or replace the max-duration timer for a call. */
 export function startMaxDurationTimer(params: {
   ctx: MaxDurationTimerContext;
   callId: CallId;
@@ -53,6 +57,7 @@ export function startMaxDurationTimer(params: {
         );
         call.endReason = "timeout";
         persistCallRecord(params.ctx.storePath, call);
+        // Provider-specific timeout handling owns the actual hangup after state persistence.
         await params.onTimeout(params.callId);
       }
     })();
@@ -61,6 +66,7 @@ export function startMaxDurationTimer(params: {
   params.ctx.maxDurationTimers.set(params.callId, timer);
 }
 
+/** Clear and forget a pending final-transcript waiter. */
 export function clearTranscriptWaiter(ctx: TranscriptWaiterContext, callId: CallId): void {
   const waiter = ctx.transcriptWaiters.get(callId);
   if (!waiter) {
@@ -70,6 +76,7 @@ export function clearTranscriptWaiter(ctx: TranscriptWaiterContext, callId: Call
   ctx.transcriptWaiters.delete(callId);
 }
 
+/** Reject a pending transcript waiter during call finalization or error paths. */
 export function rejectTranscriptWaiter(
   ctx: TranscriptWaiterContext,
   callId: CallId,
@@ -83,6 +90,7 @@ export function rejectTranscriptWaiter(
   waiter.reject(new Error(reason));
 }
 
+/** Resolve a transcript waiter when the matching turn's final transcript arrives. */
 export function resolveTranscriptWaiter(
   ctx: TranscriptWaiterContext,
   callId: CallId,
@@ -101,6 +109,7 @@ export function resolveTranscriptWaiter(
   return true;
 }
 
+/** Wait for the next final transcript for a call, optionally scoped to a turn token. */
 export function waitForFinalTranscript(
   ctx: TimerContext,
   callId: CallId,
diff --git a/extensions/voice-call/src/manager/twiml.ts b/extensions/voice-call/src/manager/twiml.ts
index 1e20d652b926..9365ae202589 100644
--- a/extensions/voice-call/src/manager/twiml.ts
+++ b/extensions/voice-call/src/manager/twiml.ts
@@ -1,5 +1,8 @@
 import { escapeXml } from "../voice-mapping.js";
 
+// TwiML builders for manager-initiated notify and DTMF redirect flows.
+
+/** Generate TwiML that speaks one notification and hangs up. */
 export function generateNotifyTwiml(message: string, voice: string): string {
   return `<?xml version="1.0" encoding="UTF-8"?>
 <Response>
@@ -8,6 +11,7 @@ export function generateNotifyTwiml(message: string, voice: string): string {
 </Response>`;
 }
 
+/** Generate TwiML that plays DTMF digits before redirecting to a webhook URL. */
 export function generateDtmfRedirectTwiml(digits: string, webhookUrl: string): string {
   return `<?xml version="1.0" encoding="UTF-8"?>
 <Response>