refactor: relocate outbox I/O to session-manager + dead-code sweep

## Outbox extraction (delivery.ts → session-manager.ts)

File I/O for outbound attachments now lives in session-manager.ts alongside
the symmetric inbound extractAttachmentFiles. delivery.ts no longer touches
the filesystem — it hands buffers to the adapter and calls clearOutbox on
success.

- New `readOutboxFiles(agentGroupId, sessionId, messageId, filenames)` and
  `clearOutbox(agentGroupId, sessionId, messageId)` in session-manager.ts.
- deliverMessage in delivery.ts loses ~35 lines of fs/path code and its
  `fs`/`path` imports.

## Dead-code sweep

TypeScript's --noUnusedLocals surfaced several cruft imports. Fixed:

- src/container-runner.ts: drop unused `markContainerIdle` import; drop
  unused `session` parameter from `buildContainerArgs` signature.
- src/delivery.ts: drop unused `getSession`, `writeSessionMessage`,
  `wakeContainer` imports.
- src/host-sweep.ts: drop unused `updateSession`, `outboundDbPath` imports.
- container/agent-runner/src/poll-loop.ts: drop unused `config`,
  `processingIds` params from `processQuery`.
- Test files: drop unused imports in channel-registry.test, db-v2.test,
  host-core.test.

Skipped: `conversations` state in chat-sdk-bridge.ts (never read but
tangled with public `updateConversations` method; cleaning it risks a
merge conflict with the channels branch at the next sync).

## Validation

- `pnpm run build` clean
- `pnpm test` — 137 host tests pass
- `bun test` in container/agent-runner — 17 tests pass
- Service boots (`NanoClaw running`, `OneCLI approval handler started`)
  and shuts down cleanly on SIGTERM

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

container/agent-runner/src/poll-loop.ts

@@ -192,7 +192,7 @@ export async function runPollLoop(config: PollLoopConfig): Promise<void> {
     const skippedSet = new Set(skipped);
     const processingIds = ids.filter((id) => !commandIds.includes(id) && !skippedSet.has(id));
     try {
-      const result = await processQuery(query, routing, config, processingIds);
+      const result = await processQuery(query, routing);
       if (result.continuation && result.continuation !== continuation) {
         continuation = result.continuation;
         setStoredSessionId(continuation);
@@ -264,7 +264,7 @@ interface QueryResult {
   continuation?: string;
 }
 
-async function processQuery(query: AgentQuery, routing: RoutingContext, config: PollLoopConfig, processingIds: string[]): Promise<QueryResult> {
+async function processQuery(query: AgentQuery, routing: RoutingContext): Promise<QueryResult> {
   let queryContinuation: string | undefined;
   let done = false;
   let lastEventTime = Date.now();

src/channels/channel-registry.test.ts

@@ -206,7 +206,7 @@ describe('channel + router integration', () => {
       factory: () => mockAdapter,
     });
 
-    await initChannelAdapters((adapter) => ({
+    await initChannelAdapters(() => ({
       conversations: [],
       onInbound: () => {},
       onMetadata: () => {},

src/container-runner.ts

@@ -27,7 +27,6 @@ import {
   type VolumeMount,
 } from './providers/provider-container-registry.js';
 import {
-  markContainerIdle,
   markContainerRunning,
   markContainerStopped,
   sessionDir,
@@ -107,15 +106,7 @@ async function spawnContainer(session: Session): Promise<void> {
   // OneCLI agent identifier is always the agent group id — stable across
   // sessions and reversible via getAgentGroup() for approval routing.
   const agentIdentifier = agentGroup.id;
-  const args = await buildContainerArgs(
-    mounts,
-    containerName,
-    session,
-    agentGroup,
-    provider,
-    contribution,
-    agentIdentifier,
-  );
+  const args = await buildContainerArgs(mounts, containerName, agentGroup, provider, contribution, agentIdentifier);
 
   log.info('Spawning container', { sessionId: session.id, agentGroup: agentGroup.name, containerName });
 
@@ -257,7 +248,6 @@ function buildMounts(
 async function buildContainerArgs(
   mounts: VolumeMount[],
   containerName: string,
-  session: Session,
   agentGroup: AgentGroup,
   provider: string,
   providerContribution: ProviderContainerContribution,

src/db/db-v2.test.ts

@@ -13,7 +13,6 @@ import {
   createMessagingGroup,
   getMessagingGroup,
   getMessagingGroupByPlatform,
-  getAllMessagingGroups,
   updateMessagingGroup,
   deleteMessagingGroup,
   createMessagingGroupAgent,

src/delivery.ts

@@ -8,10 +8,8 @@
  *   - Never writes to outbound.db — preserves single-writer-per-file invariant
  */
 import type Database from 'better-sqlite3';
-import fs from 'fs';
-import path from 'path';
 
-import { getRunningSessions, getActiveSessions, createPendingQuestion, getSession } from './db/sessions.js';
+import { getRunningSessions, getActiveSessions, createPendingQuestion } from './db/sessions.js';
 import { getAgentGroup } from './db/agent-groups.js';
 import { getDb, hasTable } from './db/connection.js';
 import { getMessagingGroupByPlatform } from './db/messaging-groups.js';
@@ -24,8 +22,8 @@ import {
 } from './db/session-db.js';
 import { log } from './log.js';
 import { normalizeOptions } from './channels/ask-question.js';
-import { openInboundDb, openOutboundDb, sessionDir, writeSessionMessage } from './session-manager.js';
-import { resetContainerIdleTimer, wakeContainer } from './container-runner.js';
+import { clearOutbox, openInboundDb, openOutboundDb, readOutboxFiles } from './session-manager.js';
+import { resetContainerIdleTimer } from './container-runner.js';
 import { pauseTypingRefreshAfterDelivery, setTypingAdapter } from './modules/typing/index.js';
 import type { OutboundFile } from './channels/adapter.js';
 import type { Session } from './types.js';
@@ -346,21 +344,13 @@ async function deliverMessage(
     return;
   }
 
-  // Read file attachments from outbox if the content declares files
-  let files: OutboundFile[] | undefined;
-  const outboxDir = path.join(sessionDir(session.agent_group_id, session.id), 'outbox', msg.id);
-  if (Array.isArray(content.files) && content.files.length > 0 && fs.existsSync(outboxDir)) {
-    files = [];
-    for (const filename of content.files as string[]) {
-      const filePath = path.join(outboxDir, filename);
-      if (fs.existsSync(filePath)) {
-        files.push({ filename, data: fs.readFileSync(filePath) });
-      } else {
-        log.warn('Outbox file not found', { messageId: msg.id, filename });
-      }
-    }
-    if (files.length === 0) files = undefined;
-  }
+  // Read file attachments from outbox if the content declares files.
+  // File I/O lives in session-manager.ts (symmetric with inbound
+  // extractAttachmentFiles) — delivery just hands buffers to the adapter.
+  const files =
+    Array.isArray(content.files) && content.files.length > 0
+      ? readOutboxFiles(session.agent_group_id, session.id, msg.id, content.files as string[])
+      : undefined;
 
   const platformMsgId = await deliveryAdapter.deliver(
     msg.channel_type,
@@ -378,17 +368,7 @@ async function deliverMessage(
     fileCount: files?.length,
   });
 
-  // Clean up outbox best-effort — the message is already on the user's
-  // screen, so a cleanup failure must NOT propagate. If it did, the
-  // caller would treat the whole delivery as failed, retry on the next
-  // poll, and the user would see the message twice.
-  if (fs.existsSync(outboxDir)) {
-    try {
-      fs.rmSync(outboxDir, { recursive: true, force: true });
-    } catch (err) {
-      log.warn('Outbox cleanup failed (message already delivered)', { messageId: msg.id, err });
-    }
-  }
+  clearOutbox(session.agent_group_id, session.id, msg.id);
 
   return platformMsgId;
 }

src/host-core.test.ts

@@ -23,7 +23,6 @@ import {
   sessionDir,
   inboundDbPath,
   outboundDbPath,
-  sessionsBaseDir,
 } from './session-manager.js';
 import { getSession, findSession } from './db/sessions.js';
 import type { InboundEvent } from './router.js';

src/host-sweep.ts

@@ -10,7 +10,7 @@
 import type Database from 'better-sqlite3';
 import fs from 'fs';
 
-import { getActiveSessions, updateSession } from './db/sessions.js';
+import { getActiveSessions } from './db/sessions.js';
 import { getAgentGroup } from './db/agent-groups.js';
 import {
   countDueMessages,
@@ -21,7 +21,7 @@ import {
   retryWithBackoff,
 } from './db/session-db.js';
 import { log } from './log.js';
-import { openInboundDb, openOutboundDb, inboundDbPath, outboundDbPath, heartbeatPath } from './session-manager.js';
+import { openInboundDb, openOutboundDb, inboundDbPath, heartbeatPath } from './session-manager.js';
 import { wakeContainer, isContainerRunning } from './container-runner.js';
 import type { Session } from './types.js';
 

src/session-manager.ts

@@ -14,6 +14,7 @@ import type Database from 'better-sqlite3';
 import fs from 'fs';
 import path from 'path';
 
+import type { OutboundFile } from './channels/adapter.js';
 import { DATA_DIR } from './config.js';
 import { getMessagingGroup } from './db/messaging-groups.js';
 import { createSession, findSession, findSessionByAgentGroup, getSession, updateSession } from './db/sessions.js';
@@ -289,6 +290,53 @@ export function writeSystemResponse(
   });
 }
 
+/**
+ * Load outbox attachments for a delivered message.
+ *
+ * Symmetric with `extractAttachmentFiles` on the inbound side: the container
+ * writes files into the session's `outbox/<messageId>/` directory alongside
+ * its `messages_out` row, and the host reads them back at delivery time.
+ *
+ * Returns undefined when the outbox dir is missing or no declared file was
+ * actually on disk — delivery continues without attachments rather than
+ * failing the whole message.
+ */
+export function readOutboxFiles(
+  agentGroupId: string,
+  sessionId: string,
+  messageId: string,
+  filenames: string[],
+): OutboundFile[] | undefined {
+  const outboxDir = path.join(sessionDir(agentGroupId, sessionId), 'outbox', messageId);
+  if (!fs.existsSync(outboxDir)) return undefined;
+  const files: OutboundFile[] = [];
+  for (const filename of filenames) {
+    const filePath = path.join(outboxDir, filename);
+    if (fs.existsSync(filePath)) {
+      files.push({ filename, data: fs.readFileSync(filePath) });
+    } else {
+      log.warn('Outbox file not found', { messageId, filename });
+    }
+  }
+  return files.length > 0 ? files : undefined;
+}
+
+/**
+ * Remove a message's outbox directory after successful delivery. Best-effort:
+ * failures log and swallow. A cleanup failure must NOT propagate to the
+ * delivery caller — the message is already on the user's screen, and a
+ * thrown error would trigger the delivery retry path and deliver twice.
+ */
+export function clearOutbox(agentGroupId: string, sessionId: string, messageId: string): void {
+  const outboxDir = path.join(sessionDir(agentGroupId, sessionId), 'outbox', messageId);
+  if (!fs.existsSync(outboxDir)) return;
+  try {
+    fs.rmSync(outboxDir, { recursive: true, force: true });
+  } catch (err) {
+    log.warn('Outbox cleanup failed (message already delivered)', { messageId, err });
+  }
+}
+
 /** Mark a container as running for a session. */
 export function markContainerRunning(sessionId: string): void {
   updateSession(sessionId, { container_status: 'running', last_active: new Date().toISOString() });