diff --git a/src/servers/api/chat/opencode/event-mapper.ts b/src/servers/api/chat/opencode/event-mapper.ts
index 2c069b22..cc3bda08 100644
--- a/src/servers/api/chat/opencode/event-mapper.ts
+++ b/src/servers/api/chat/opencode/event-mapper.ts
@@ -14,8 +14,8 @@ import type { ChatEvent, MessageCost } from '../types';
 // are only distinguishable by the delta's part TYPE (a message.part.updated declaring the part as
 // `reasoning` vs `text` always precedes that part's deltas). So we gate deltas on partID being a `text`
 // part; reasoning-part deltas are dropped (parity with the Claude harness, which hides thinking).
-// createEventHandler flushes the assistant text buffer on tool:start and result, so no explicit `text`
-// event is needed — the streamed answer deltas are enough.
+// The turn translator (`sidecar/claude/turn-stream.ts`, shared by both harnesses) flushes the assistant
+// text buffer on tool:start and result, so no explicit `text` event is needed — the deltas are enough.
 
 export type OpenCodeEvent = {
   id?: string;
@@ -96,7 +96,12 @@ export function createEventMapper(onEvent: (event: ChatEvent) => void) {
 
         if (status === 'completed' && !toolFinished.has(callID)) {
           toolFinished.add(callID);
-          onEvent({ type: 'tool:result', toolCallId: callID, output: String(part.state?.output ?? ''), isError: false });
+          onEvent({
+            type: 'tool:result',
+            toolCallId: callID,
+            output: String(part.state?.output ?? ''),
+            isError: false,
+          });
         } else if (status === 'error' && !toolFinished.has(callID)) {
           toolFinished.add(callID);
           onEvent({
@@ -110,7 +115,7 @@ export function createEventMapper(onEvent: (event: ChatEvent) => void) {
       }
 
       case 'message.updated': {
-        const info = ((p.info as AssistantInfo | undefined) ?? (p as AssistantInfo)) ?? {};
+        const info = (p.info as AssistantInfo | undefined) ?? (p as AssistantInfo) ?? {};
         if (info.role === 'assistant' && info.tokens) {
           cost = {
             inputTokens: info.tokens.input ?? 0,
@@ -128,7 +133,8 @@ export function createEventMapper(onEvent: (event: ChatEvent) => void) {
 
       case 'session.error': {
         const error = p.error;
-        const message = typeof error === 'string' ? error : ((error as { message?: string })?.message ?? 'OpenCode error');
+        const message =
+          typeof error === 'string' ? error : ((error as { message?: string })?.message ?? 'OpenCode error');
         finish({ type: 'error', message });
         return;
       }
diff --git a/src/servers/api/chat/websocket.ts b/src/servers/api/chat/websocket.ts
index 212a9a36..7cd4a469 100644
--- a/src/servers/api/chat/websocket.ts
+++ b/src/servers/api/chat/websocket.ts
@@ -1,6 +1,6 @@
 import type { ServerWebSocket } from 'bun';
 import { randomUUID } from 'crypto';
-import type { ClientMessage, ServerMessage, Message, ChatEvent, TurnMessage, UserSession } from './types';
+import type { ClientMessage, ServerMessage, Message, TurnMessage, UserSession } from './types';
 import { sessionManager } from './session-manager';
 import { sendClaudeCodeStreaming } from '@@/channels/send-claude-code';
 import { sendOpenCodeStreaming } from '@@/channels/send-opencode';
@@ -8,7 +8,7 @@ import { ensureGeneralChatSessionsCwd } from './claude-sessions';
 import * as sidecar from '@@/sidecar-registry';
 import { join } from 'path';
 import { getOwnerHomeDir, getEmailAccountsDir } from '../../../servers/data-path';
-import { getUserSettings, getEmailAccounts, appendChatEvent, getChatEventsSince } from 'officerdb';
+import { getUserSettings, getEmailAccounts, getChatEventsSince } from 'officerdb';
 import { mkdirSync } from 'node:fs';
 import { logger } from './logger';
 
@@ -96,24 +96,11 @@ function sendToClient(ws: ServerWebSocket<WSData> | null, msg: ServerMessage, se
   }
 }
 
-// Persist a durable session event to the Postgres queue (for replay across reconnects) and deliver it
-// live to the attached socket with its cursor `seq`. Events are queued even while the client is
-// DISCONNECTED (ws null) — that's what lets a reconnecting client replay what it missed (e.g. a
-// background task:notification). Streaming deltas are ephemeral: delivered live, never persisted.
-async function emitToSession(sessionId: string, msg: ServerMessage): Promise<void> {
-  const ws = (sessionManager.getSession(sessionId)?.ws ?? null) as ServerWebSocket<WSData> | null;
-  if (msg.type === 'assistant:delta') {
-    sendToClient(ws, msg);
-    return;
-  }
-  let seq: number | undefined;
-  try {
-    seq = await appendChatEvent(sessionId, msg);
-  } catch (err) {
-    logger.error('Failed to persist chat event', { sessionId, error: String(err) });
-  }
-  sendToClient(ws, msg, seq);
-}
+// Nothing in officer writes to chat_session_events any more. Both harnesses commit their own turn
+// output in the sidecar that produced it (`sidecar/claude/session-log.ts`), which is the whole point:
+// the durable record does not travel over the socket between the two processes, so officer can restart
+// mid-turn without losing it. Officer reads the table on `resume` (getChatEventsSince) and relays what
+// the sidecars send. The old `emitToSession` used to live here.
 
 export async function open(ws: ServerWebSocket<WSData>): Promise<void> {
   const timer = setInterval(() => {
@@ -228,7 +215,8 @@ function foldIntoSession(session: UserSession, msg: TurnMessage, model: string):
   }
 }
 
-function createClaudeMessageHandler(sessionId: string, model: string) {
+// Shared by both harnesses now: whichever sidecar ran the turn has already translated and committed it.
+function createMessageHandler(sessionId: string, model: string) {
   return (msg: TurnMessage, seq?: number): void => {
     const session = sessionManager.getSession(sessionId);
     if (!session) return;
@@ -237,166 +225,6 @@ function createClaudeMessageHandler(sessionId: string, model: string) {
   };
 }
 
-// ── OpenCode: officer still translates and persists ──
-
-// Unchanged from before the split, and still correct for OpenCode: that sidecar reports raw ChatEvents,
-// so officer does the translation and owns the durable write. Moving it is the `sidecars-opencode` branch.
-function createEventHandler(sessionId: string, model: string, cwd: string) {
-  return async (event: ChatEvent): Promise<void> => {
-    const session = sessionManager.getSession(sessionId);
-    if (!session) return;
-
-    // All durable sends go through emitToSession (persist + deliver with cursor seq). Deltas stay live-only.
-    switch (event.type) {
-      case 'delta': {
-        await emitToSession(sessionId, { type: 'assistant:delta', text: event.text });
-        session.streamBuffer += event.text;
-        break;
-      }
-
-      case 'text': {
-        // Flush streaming buffer as complete text
-        const text = event.text || session.streamBuffer;
-        if (text) {
-          await emitToSession(sessionId, { type: 'assistant:text', text });
-
-          const assistantMsg: Message = {
-            id: randomUUID(),
-            timestamp: Date.now(),
-            role: 'assistant',
-            text,
-            model,
-          };
-          session.messages.push(assistantMsg);
-          session.meta.messageCount += 1;
-          session.streamBuffer = '';
-        }
-        break;
-      }
-
-      case 'tool:start': {
-        // Flush any pending streaming text first
-        if (session.streamBuffer) {
-          await emitToSession(sessionId, { type: 'assistant:text', text: session.streamBuffer });
-
-          const assistantMsg: Message = {
-            id: randomUUID(),
-            timestamp: Date.now(),
-            role: 'assistant',
-            text: session.streamBuffer,
-            model,
-          };
-          session.messages.push(assistantMsg);
-          session.meta.messageCount += 1;
-          session.streamBuffer = '';
-        }
-
-        await emitToSession(sessionId, {
-          type: 'tool:start',
-          toolCallId: event.toolCallId,
-          toolName: event.toolName,
-          toolInput: event.toolInput,
-        });
-
-        const toolMsg: Message = {
-          id: randomUUID(),
-          timestamp: Date.now(),
-          role: 'tool',
-          toolCallId: event.toolCallId,
-          toolName: event.toolName,
-          toolInput: event.toolInput,
-        };
-        session.messages.push(toolMsg);
-        session.meta.messageCount += 1;
-        break;
-      }
-
-      case 'tool:result': {
-        await emitToSession(sessionId, {
-          type: 'tool:result',
-          toolCallId: event.toolCallId,
-          output: event.output,
-          isError: event.isError,
-        });
-
-        // Update existing tool message with output
-        for (let i = session.messages.length - 1; i >= 0; i--) {
-          const m = session.messages[i]!;
-          if (m.role === 'tool' && m.toolCallId === event.toolCallId) {
-            m.output = event.output;
-            m.isError = event.isError;
-            break;
-          }
-        }
-        break;
-      }
-
-      case 'result': {
-        // Flush any remaining streaming buffer
-        if (session.streamBuffer) {
-          await emitToSession(sessionId, { type: 'assistant:text', text: session.streamBuffer });
-
-          const assistantMsg: Message = {
-            id: randomUUID(),
-            timestamp: Date.now(),
-            role: 'assistant',
-            text: session.streamBuffer,
-            model,
-            cost: event.cost,
-          };
-          session.messages.push(assistantMsg);
-          session.meta.messageCount += 1;
-          session.streamBuffer = '';
-        }
-
-        await emitToSession(sessionId, { type: 'result', sessionId, cost: event.cost });
-
-        session.isGenerating = false;
-        session.meta.cost.inputTokens += event.cost.inputTokens;
-        session.meta.cost.outputTokens += event.cost.outputTokens;
-        session.meta.cost.totalUSD += event.cost.totalUSD;
-        session.meta.updatedAt = Date.now();
-        // No disk persistence — Claude's transcript is the record.
-        break;
-      }
-
-      case 'error': {
-        await emitToSession(sessionId, { type: 'error', message: event.message });
-        session.isGenerating = false;
-        break;
-      }
-
-      case 'stopped': {
-        await emitToSession(sessionId, { type: 'stopped' });
-        session.isGenerating = false;
-        break;
-      }
-
-      case 'task:started': {
-        // Background task launched (run_in_background / Monitor). Independent of turn state.
-        await emitToSession(sessionId, {
-          type: 'task:started',
-          taskId: event.taskId,
-          description: event.description,
-          taskType: event.taskType,
-        });
-        break;
-      }
-
-      case 'task:notification': {
-        // Background task finished — arrives AFTER the turn's 'result'; the whole point of the fix.
-        await emitToSession(sessionId, {
-          type: 'task:notification',
-          taskId: event.taskId,
-          status: event.status,
-          summary: event.summary,
-        });
-        break;
-      }
-    }
-  };
-}
-
 async function handleChat(
   ws: ServerWebSocket<WSData>,
   msg: {
@@ -487,7 +315,7 @@ async function handleClaudeCodeChat(
 
   session.isGenerating = true;
 
-  const onMessage = createClaudeMessageHandler(sessionId, model);
+  const onMessage = createMessageHandler(sessionId, model);
 
   try {
     if (!session._claudeKill) {
@@ -578,7 +406,7 @@ async function handleOpenCodeChat(
 
   session.isGenerating = true;
 
-  const onEvent = createEventHandler(sessionId, model, cwd);
+  const onMessage = createMessageHandler(sessionId, model);
 
   try {
     const handle = await sendOpenCodeStreaming({
@@ -590,7 +418,7 @@ async function handleOpenCodeChat(
       cwd,
       model,
       resumeSessionId: msg.resumeSessionId,
-      onEvent,
+      onMessage,
     });
 
     // Store the abort handle so handleStop can end the turn (OpenCode is aborted via this handle).
diff --git a/src/servers/channels/send-opencode.ts b/src/servers/channels/send-opencode.ts
index c8059c5a..52f1ece9 100644
--- a/src/servers/channels/send-opencode.ts
+++ b/src/servers/channels/send-opencode.ts
@@ -1,13 +1,13 @@
-import type { ChatEvent } from '@@/api/chat/types';
+import type { TurnMessage } from '@@/api/chat/types';
 import { logger } from '@@/api/chat/logger';
 import * as sidecar from '@@/sidecar-registry';
 import { getOpenCodeSession } from '@@/api/chat/opencode/state';
 
 // The OpenCode analog of send-claude-code.ts: it drives a turn through the officer-opencode sidecar,
-// which spawns `opencode run … --format json` (tools hard-anchored to the chat cwd via --dir) and
-// streams mapped ChatEvents back over the sidecar WS. We subscribe to those events (filtered by
-// sessionKey) and forward them to the caller's onEvent — the same shared contract the Claude harness
-// uses, so createEventHandler and the whole UI pipeline are unchanged.
+// which spawns `opencode run … --format json` (tools hard-anchored to the chat cwd via --dir), maps its
+// output to TurnMessages, commits each one to chat_session_events and streams the finished message plus
+// its cursor id back over the sidecar WS. We subscribe (filtered by sessionKey) and forward to the
+// caller's onMessage — the same contract sendClaudeCodeStreaming uses.
 
 type OpenCodeStreamingParams = {
   userId: number;
@@ -19,7 +19,9 @@ type OpenCodeStreamingParams = {
   model?: string;
   role?: string;
   resumeSessionId?: string;
-  onEvent: (event: ChatEvent) => void;
+  durable?: boolean;
+  // Finished turn messages, already committed by the sidecar; `seq` is the cursor id to deliver them under.
+  onMessage: (msg: TurnMessage, seq?: number) => void;
 };
 
 type OpenCodeStreamingHandle = {
@@ -29,11 +31,13 @@ type OpenCodeStreamingHandle = {
 export async function sendOpenCodeStreaming(params: OpenCodeStreamingParams): Promise<OpenCodeStreamingHandle> {
   logger.info('OpenCode streaming exec (via sidecar)', { sessionKey: params.sessionKey, model: params.model });
 
-  // Forward this session's turn events; unsubscribe on the terminal event.
-  const unsub = sidecar.onOpenCodeEvent((sessionKey, event) => {
+  // Forward this session's turn messages; unsubscribe on the terminal one. Unlike the Claude harness
+  // there is nothing after `result` here — `opencode run` exits with the turn, so it has no background
+  // tasks that could report later.
+  const unsub = sidecar.onOpenCodeMessage((sessionKey, msg, seq) => {
     if (sessionKey !== params.sessionKey) return;
-    params.onEvent(event);
-    if (event.type === 'result' || event.type === 'error' || event.type === 'stopped') unsub();
+    params.onMessage(msg, seq);
+    if (msg.type === 'result' || msg.type === 'error' || msg.type === 'stopped') unsub();
   });
 
   // Resume an existing OpenCode session when we know its id: a stored mapping (set from the sidecar's
@@ -51,6 +55,7 @@ export async function sendOpenCodeStreaming(params: OpenCodeStreamingParams): Pr
       cwd: params.cwd,
       model: params.model,
       resumeSessionId,
+      durable: params.durable,
     });
   } catch (err) {
     unsub();
diff --git a/src/servers/sidecar-registry.ts b/src/servers/sidecar-registry.ts
index 925bb28f..28bc55f1 100644
--- a/src/servers/sidecar-registry.ts
+++ b/src/servers/sidecar-registry.ts
@@ -13,7 +13,7 @@ import type {
   VncSessionInfo,
 } from './sidecar/protocol';
 import type { SidecarRegistration } from './sidecar/registration-protocol';
-import type { ChatEvent, TurnMessage } from './api/chat/types';
+import type { TurnMessage } from './api/chat/types';
 
 // ── Types ──
 
@@ -298,14 +298,11 @@ export function killOpenCode(sessionKey: string): void {
   sendFire('opencode', { type: 'opencode:kill', id: nextId(), sessionKey });
 }
 
-export function onOpenCodeEvent(handler: (sessionKey: string, event: ChatEvent) => void): () => void {
-  return on('opencode:event', (msg) => {
-    if (msg.type === 'opencode:event') {
-      handler(
-        (msg as SidecarEvent & { type: 'opencode:event' }).sessionKey,
-        (msg as SidecarEvent & { type: 'opencode:event' }).event,
-      );
-    }
+export function onOpenCodeMessage(handler: (sessionKey: string, msg: TurnMessage, seq?: number) => void): () => void {
+  return on('opencode:message', (ev) => {
+    if (ev.type !== 'opencode:message') return;
+    const msg = ev as SidecarEvent & { type: 'opencode:message' };
+    handler(msg.sessionKey, msg.msg, msg.seq);
   });
 }
 
diff --git a/src/servers/sidecar/claude/turn-stream.ts b/src/servers/sidecar/claude/turn-stream.ts
index f0461928..51bd79b9 100644
--- a/src/servers/sidecar/claude/turn-stream.ts
+++ b/src/servers/sidecar/claude/turn-stream.ts
@@ -1,7 +1,8 @@
 import type { ChatEvent, TurnMessage } from '../../api/chat/types';
 
-// Translation from the parser's ChatEvent stream to the browser-facing turn messages, moved here from
-// the main server (`chat/websocket.ts:createEventHandler`). It lives with the process that produces the
+// Translation from a harness's ChatEvent stream to the browser-facing turn messages, moved here from the
+// main server (it was `createEventHandler` in `chat/websocket.ts`, once per harness). Both the agent and
+// the opencode sidecar use this one copy. It lives with the process that produces the
 // stream because it is stateful: `delta` events accumulate into a buffer that has to be flushed as one
 // `assistant:text` at the next boundary (a tool call, or the end of the turn). A consumer downstream of
 // a socket that can drop cannot hold that state correctly.
diff --git a/src/servers/sidecar/opencode/index.ts b/src/servers/sidecar/opencode/index.ts
index 03e2ccf0..7417eec7 100644
--- a/src/servers/sidecar/opencode/index.ts
+++ b/src/servers/sidecar/opencode/index.ts
@@ -3,6 +3,7 @@ import { homedir } from 'node:os';
 import { join } from 'node:path';
 import { DATA_PATH } from '../../data-path';
 import { createSidecarConnector } from '../connect';
+import { createSessionLogStore } from '../claude/session-log';
 import type { SidecarCommand, SidecarEvent } from '../protocol';
 import { runOpenCodeTurn, killOpenCodeTurn } from './runner';
 
@@ -131,22 +132,33 @@ console.log(`[opencode] serve healthy on port ${port}`);
 // ── Command handlers ──
 
 type ReplyFn = (msg: SidecarEvent) => void;
-type SendFn = (msg: SidecarEvent) => void;
 
 const RUNNER_CONFIG = { bin: OPENCODE_BIN, fallbackCwd: SERVE_CWD };
 
-function handleCommand(cmd: SidecarCommand, reply: ReplyFn, send: SendFn) {
+function handleCommand(cmd: SidecarCommand, reply: ReplyFn) {
   switch (cmd.type) {
     case 'ping':
       reply({ type: 'pong', id: cmd.id });
       break;
-    case 'opencode:run-streaming':
-      // Fire the turn; events stream back via `send` (opencode:event / opencode:session / terminal).
-      runOpenCodeTurn(cmd.params, RUNNER_CONFIG, send);
-      reply({ type: 'opencode:spawned', id: cmd.id, sessionKey: cmd.params.sessionKey });
+    case 'opencode:run-streaming': {
+      const { sessionKey, durable = true } = cmd.params;
+      // Turn output goes through the session log: translated to TurnMessages and committed to
+      // chat_session_events here, in the process that produced it. Officer being down during a turn
+      // no longer costs the transcript — the browser replays it from its cursor.
+      runOpenCodeTurn(cmd.params, RUNNER_CONFIG, (msg) => {
+        if (msg.type === 'opencode:event') {
+          sessionLog.push(sessionKey, msg.event, durable);
+          return;
+        }
+        // opencode:session is a routing fact (which `ses_…` to resume), not transcript — send it live.
+        connection.send(msg);
+      });
+      reply({ type: 'opencode:spawned', id: cmd.id, sessionKey });
       break;
+    }
     case 'opencode:kill':
       killOpenCodeTurn(cmd.sessionKey);
+      sessionLog.drop(cmd.sessionKey);
       break;
     default:
       reply({
@@ -164,8 +176,7 @@ const connection = createSidecarConnector({
   name: 'opencode',
   capabilities: ['opencode'],
   onCommand(cmd, reply) {
-    // Streaming turn events use a stable send (always the current ws), not the per-command reply.
-    handleCommand(cmd as SidecarCommand, reply as ReplyFn, (msg) => connection.send(msg));
+    handleCommand(cmd as SidecarCommand, reply as ReplyFn);
   },
   onConnected() {
     // Tell the API where our OpenCode HTTP server is listening, so it can route requests there.
@@ -174,6 +185,13 @@ const connection = createSidecarConnector({
   },
 });
 
+// Translate → commit → deliver, in that order and one at a time per session. Shared with the agent
+// sidecar (`claude/session-log.ts`): both harnesses speak ChatEvents, so the translation and the write
+// are the same code, and only the wire event type differs.
+const sessionLog = createSessionLogStore((d) =>
+  connection.send({ type: 'opencode:message', sessionKey: d.sessionId, msg: d.msg, seq: d.seq }),
+);
+
 // ── Graceful shutdown ──
 
 function shutdown(signal: string) {
diff --git a/src/servers/sidecar/opencode/runner.ts b/src/servers/sidecar/opencode/runner.ts
index a057c7e1..efbbb474 100644
--- a/src/servers/sidecar/opencode/runner.ts
+++ b/src/servers/sidecar/opencode/runner.ts
@@ -1,7 +1,7 @@
 import { existsSync } from 'node:fs';
 import type { Subprocess } from 'bun';
 import type { ChatEvent, MessageCost } from '../../api/chat/types';
-import type { OpenCodeRunParams, SidecarEvent } from '../protocol';
+import type { OpenCodeRunParams } from '../protocol';
 
 // Drives one chat turn by spawning `opencode run … --format json` and mapping its newline-delimited
 // JSON events to the shared ChatEvent contract. This is the reliable path: `--dir <cwd>` hard-anchors
@@ -21,7 +21,14 @@ export type RunnerConfig = {
   fallbackCwd: string; // used when params.cwd is missing/nonexistent
 };
 
-type Emit = (event: SidecarEvent) => void;
+// What a turn reports to the sidecar it runs in. `opencode:event` is deliberately not a wire event any
+// more: the sidecar translates each one into a TurnMessage and commits it before officer sees anything,
+// so the durable record does not depend on officer being up (see index.ts).
+export type RunnerMessage =
+  | { type: 'opencode:event'; sessionKey: string; event: ChatEvent }
+  | { type: 'opencode:session'; sessionKey: string; sessionId: string };
+
+type Emit = (msg: RunnerMessage) => void;
 
 type RunHandle = { proc: Subprocess; killedByUser: boolean };
 
@@ -108,7 +115,10 @@ export function runOpenCodeTurn(params: OpenCodeRunParams, config: RunnerConfig,
       } catch {
         /* already gone */
       }
-      finish({ type: 'error', message: `OpenCode turn stalled (no output for ${INACTIVITY_MS / 1000}s) and was stopped` });
+      finish({
+        type: 'error',
+        message: `OpenCode turn stalled (no output for ${INACTIVITY_MS / 1000}s) and was stopped`,
+      });
     }, INACTIVITY_MS);
   };
   bumpInactivity();
diff --git a/src/servers/sidecar/protocol.ts b/src/servers/sidecar/protocol.ts
index f1eb2af8..21d94757 100644
--- a/src/servers/sidecar/protocol.ts
+++ b/src/servers/sidecar/protocol.ts
@@ -1,4 +1,4 @@
-import type { MessageCost, ChatEvent, TurnMessage } from '../api/chat/types';
+import type { MessageCost, TurnMessage } from '../api/chat/types';
 
 // ── Envelope ──
 
@@ -54,9 +54,12 @@ export type SidecarEvent =
   | { type: 'email:new'; userEmail: string }
   // OpenCode — the sidecar reports where its `opencode serve` is listening (random port) on connect
   | { type: 'opencode:server'; port: number }
-  // OpenCode turn streaming (analog of claude:*): spawned ack, per-event stream, session id report
+  // OpenCode turn streaming (analog of claude:*): spawned ack, per-message stream, session id report
   | { type: 'opencode:spawned'; id: string; sessionKey: string }
-  | { type: 'opencode:event'; sessionKey: string; event: ChatEvent }
+  // Same contract as `claude:message`: a finished turn message the sidecar has already committed to
+  // chat_session_events, plus the cursor id it landed on. Officer relays it and folds it into its
+  // in-memory transcript; it does not translate or persist.
+  | { type: 'opencode:message'; sessionKey: string; msg: TurnMessage; seq?: number }
   | { type: 'opencode:session'; sessionKey: string; sessionId: string }
   | { type: 'opencode:error'; id: string; error: string }
   // Music — the sidecar reports where its audio-streaming HTTP server is listening (random port) on connect
@@ -117,6 +120,7 @@ export type OpenCodeRunParams = {
   cwd?: string; // passed to `opencode run --dir` — hard-re-anchors tools to this directory
   model?: string; // `providerID/modelID` (e.g. opencode/claude-haiku-4-5); passed to --model verbatim
   resumeSessionId?: string; // OpenCode `ses_…` id to continue (`--session`)
+  durable?: boolean; // commit turn output to chat_session_events (default true) — see ClaudeSpawnStreamingParams
 };
 
 // ── VNC types ──