sync: update from private repo (7d64ee2)

docs/tools/xsearch.md

@@ -1,4 +1,4 @@
-# X / Twitter ツール（XSearch / XUserPosts / XPostDetail / XFetchCardMedia）
+# X / Twitter ツール（XSearch / XUserPosts / XPostDetail / XTimeline / XFetchCardMedia）
 
 twitter-cli を内部で呼び出して X (旧 Twitter) のデータを取得する read-only ツール群。
 
@@ -37,6 +37,23 @@ XUserPosts({
 })
 ```
 
+## XTimeline — ホームタイムライン（ログイン中アカウント）
+
+```js
+XTimeline({
+  tab: "for_you",    // for_you (デフォルト) / following
+  limit: 20,         // デフォルト 20, 最大 50
+  full_text: true,
+  compact: false,
+  output_path: "x/timeline.txt"   // 任意
+})
+```
+
+設定済みの `auth_token` / `ct0` cookie に紐づくアカウントの**ホームタイムライン**を返す。
+`tab: "for_you"`（おすすめ）と `tab: "following"`（フォロー中）を切り替えられる。
+内部的には `twitter feed [-t following]` を呼ぶ。検索ではなく「ログイン中ユーザーが
+普段見るフィード」を取得したいときに使う。出力・メディア DL の扱いは XSearch と共通。
+
 ## XPostDetail — 投稿の詳細＋リプライ
 
 ```js

pieces/chat.yaml

@@ -66,7 +66,7 @@ movements:
         - `result` がそのままユーザーに表示される最終出力。途中のメモや作業ログは入れない
       - **ユーザー確認が必要**: `complete({status: "needs_user_input", missing_info: "確認したい内容", why_no_default: "デフォルトで進められない理由"})`
       - **技術的失敗で打ち切り**: `complete({status: "aborted", abort_reason: "失敗の理由"})`
-    allowed_tools: [Read, Write, Edit, Glob, Grep, WebSearch, WebFetch, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, ReadExcel, ReadDocx, ReadPPTX, SQLite, Bash, XSearch, XUserPosts, XPostDetail, XFetchCardMedia, BrowseWeb, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, ListPieces, GetPiece, CreatePiece, UpdatePiece, SearchKnowledge, ListNamespaces, ListDocuments, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, ReadToolDoc, UpdateDashboardWidget, 'mcp__*']
+    allowed_tools: [Read, Write, Edit, Glob, Grep, WebSearch, WebFetch, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, ReadExcel, ReadDocx, ReadPPTX, SQLite, Bash, XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, BrowseWeb, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, ListPieces, GetPiece, CreatePiece, UpdatePiece, SearchKnowledge, ListNamespaces, ListDocuments, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, ReadToolDoc, UpdateDashboardWidget, 'mcp__*']
     # default_next is the engine-internal fallback for context overflow / ASK
     # limit reached / SpawnSubTask unavailable. It is NOT exposed to the LLM.
     default_next: COMPLETE

pieces/research-sub.yaml

@@ -45,7 +45,7 @@ movements:
       - **追加調査のため同じ dig を続行**: `transition({next_step: "dig"})`
       - **対象が曖昧で確認が必要**: `complete({status: "needs_user_input", missing_info: "...", why_no_default: "..."})`
       - **技術的失敗で打ち切り**: `complete({status: "aborted", abort_reason: "..."})`
-    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
+    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
     default_next: analyze
     rules:
       - condition: output/ に情報を書き出した
@@ -72,7 +72,7 @@ movements:
 
       output/images/ に画像がある場合は、必ずレポートの該当箇所に埋め込む:
       `![説明](./images/ファイル名.png)`
-    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
+    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
     default_next: verify
     rules:
       - condition: output/ にレポートを書き出した

pieces/research.yaml

@@ -113,7 +113,7 @@ movements:
       - **追加調査のため同じ dig を続行**: `transition({next_step: "dig"})`
       - **対象が曖昧で確認が必要**: `complete({status: "needs_user_input", missing_info: "...", why_no_default: "..."})`
       - **技術的失敗で打ち切り**: `complete({status: "aborted", abort_reason: "..."})`
-    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
+    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
     default_next: analyze
     rules:
       - condition: 2つ以上の独立した調査テーマがあり、並列分解が効率的と判断した
@@ -146,7 +146,7 @@ movements:
       画像があるのにテキストだけのレポートにしないこと。
       レポート作成中に追加で必要な図・グラフを見つけた場合も DownloadFile で収集して埋め込む。
 
-    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
+    allowed_tools: [Read, Write, Bash, Glob, Grep, WebSearch, WebFetch, BrowseWeb, DownloadFile, ReadImage, AnnotateImage, ReadPdf, PdfToImages, BatchReviewTextWithLLM, MergeReviewedResults, SearchPlaces, GetDirections, ReverseGeocode, GetYouTubeTranscript, SearchYouTube, SearchAmazon, TranscribeAudio, SearchKnowledge, ListNamespaces, ListDocuments, XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, SearchNotes, ReadNote, WriteNote, SearchMicrosoftLearn, FetchMicrosoftLearn, SearchMicrosoftLearnCache, RefreshMicrosoftLearnCache, 'mcp__*']
     default_next: verify
     rules:
       - condition: output/ にレポートを書き出した

pieces/sns-research.yaml

@@ -28,6 +28,7 @@ movements:
       - キーワードで広く拾う → XSearch
       - 特定アカウントの発言を追う → XUserPosts
       - 議論の流れ・リプライツリーまで欲しい → XPostDetail
+      - ログイン中アカウントのホームタイムライン（おすすめ / フォロー中）を見る → XTimeline
 
       ### Reddit
       BrowseWeb で必ず **old.reddit.com** を使う（軽量でテキスト抽出しやすい）。
@@ -56,7 +57,7 @@ movements:
       - **追加収集のため同じ gather を続行**: `transition({next_step: "gather"})`
       - **対象が曖昧で確認が必要**: `complete({status: "needs_user_input", missing_info: "...", why_no_default: "..."})`
       - **技術的失敗で打ち切り**: `complete({status: "aborted", abort_reason: "..."})`
-    allowed_tools: [XSearch, XUserPosts, XPostDetail, XFetchCardMedia, BrowseWeb, WebFetch, WebSearch, Read, Write, Edit, Glob, Grep, DownloadFile, SearchKnowledge, ListNamespaces, ListDocuments, SearchNotes, ReadNote, 'mcp__*']
+    allowed_tools: [XSearch, XUserPosts, XPostDetail, XTimeline, XFetchCardMedia, BrowseWeb, WebFetch, WebSearch, Read, Write, Edit, Glob, Grep, DownloadFile, SearchKnowledge, ListNamespaces, ListDocuments, SearchNotes, ReadNote, 'mcp__*']
     default_next: analyze
     rules:
       - condition: 追加収集が必要（別のSNS、追加クエリ等）

pieces/x-ai-digest.yaml

@@ -61,6 +61,7 @@ movements:
       - XSearch
       - XUserPosts
       - XPostDetail
+      - XTimeline
       - XFetchCardMedia
       - BrowseWeb
       - WebFetch

src/engine/tools/docs.ts

@@ -41,6 +41,7 @@ const TOOL_DOC_ALIASES: Record<string, string> = {
   xuserposts: 'xsearch',
   xpostdetail: 'xsearch',
   xfetchcardmedia: 'xsearch',
+  xtimeline: 'xsearch',
   // youtube.ts をまとめる
   searchyoutube: 'getyoutubetranscript',
   // maps.ts をまとめる

src/engine/tools/raw-save.ts

@@ -9,6 +9,7 @@ export const RAW_SAVE_TOOLS = new Set([
   'XSearch',
   'XUserPosts',
   'XPostDetail',
+  'XTimeline',
   'BrowseWeb',
   'GetYouTubeTranscript',
   'SearchYouTube',

src/engine/tools/ssh-console.test.ts

@@ -126,7 +126,7 @@ function mkStubSubsystem() {
     setWindow: vi.fn(),
     on: vi.fn(),
   };
-  const client = { end: vi.fn() };
+  const client = { end: vi.fn(), on: vi.fn() };
   const openShellChannel = vi.fn().mockResolvedValue({
     channel,
     client,

src/engine/tools/ssh-console.ts

@@ -246,6 +246,7 @@ async function ensureSessionInternal(
 
   // Open the channel. On failure clear the PEM and bail.
   let channel: import('ssh2').ClientChannel;
+  let client: import('ssh2').Client;
   let hostFingerprint: string;
   try {
     const shellResult = await sub.openShellChannel({
@@ -266,6 +267,7 @@ async function ensureSessionInternal(
       timeoutMs: sub.config.callTimeoutSeconds * 1000,
     });
     channel = shellResult.channel;
+    client = shellResult.client;
     hostFingerprint = shellResult.hostFingerprint;
   } catch (e) {
     clearBuffer(pemBuf);
@@ -292,8 +294,10 @@ async function ensureSessionInternal(
     return err(`SshConsoleEnsure: failed to open shell channel: ${(e as Error).message}`);
   }
 
-  // Build the session and register it. From here on the channel + PEM
-  // belong to the session; we don't clear them on the happy path.
+  // Build the session and register it. From here on the channel + client
+  // + PEM belong to the session; we don't clear them on the happy path.
+  // The session ends the client (and thus releases the PEM-bound
+  // connection) when it closes.
   const session = new ConsoleSession({
     localTaskId,
     connectionId,
@@ -303,6 +307,7 @@ async function ensureSessionInternal(
     rows,
     scrollbackCap: sub.config.console.scrollbackBytes,
     channel,
+    client,
     auditRepo: sub.auditRepo,
   });
   sub.sessionRegistry.register(session);

src/engine/tools/x.ts

@@ -129,11 +129,30 @@ const XFETCHCARDMEDIA_DEF: ToolDef = {
   },
 };
 
+const XTIMELINE_DEF: ToolDef = {
+  type: 'function',
+  function: {
+    name: 'XTimeline',
+    description: 'ログイン中アカウントのホームタイムライン（For You / フォロー中）を取得する（twitter-cli 経由、認証 Cookie 設定が必要）。詳細は ReadToolDoc({ name: "XTimeline" })。',
+    parameters: {
+      type: 'object',
+      properties: {
+        tab: { type: 'string', enum: ['for_you', 'following'], description: 'for_you (デフォルト) / following' },
+        limit: { type: 'number', description: '件数 (デフォルト: 20, 最大: 50)' },
+        full_text: { type: 'boolean', description: '長文の省略を避ける' },
+        compact: { type: 'boolean', description: 'token 節約向けの compact 出力' },
+        output_path: { type: 'string', description: '任意: output/x/ 配下に保存する相対パス' },
+      },
+    },
+  },
+};
+
 export const TOOL_DEFS: Record<string, ToolDef> = {
   XSearch: XSEARCH_DEF,
   XUserPosts: XUSERPOSTS_DEF,
   XPostDetail: XPOSTDETAIL_DEF,
   XFetchCardMedia: XFETCHCARDMEDIA_DEF,
+  XTimeline: XTIMELINE_DEF,
 };
 
 type XHistoryRecord = {
@@ -608,6 +627,36 @@ async function executeXUserPosts(input: Record<string, unknown>, ctx: ToolContex
   return runTwitterCli('XUserPosts', args, ctx, outputPath);
 }
 
+async function executeXTimeline(input: Record<string, unknown>, ctx: ToolContext): Promise<ToolResult> {
+  const tab = String(input['tab'] ?? 'for_you');
+  const following = tab === 'following';
+  const args = ['feed', '--max', String(clampLimit(input['limit'], 20)), '--yaml'];
+  if (following) args.push('-t', 'following');
+  maybePushFlag(args, input['full_text'], '--full-text');
+  maybePushFlag(args, input['compact'], '--compact');
+  let outputPath: string | null;
+  try {
+    outputPath = resolveOptionalOutputPath(ctx, input['output_path']);
+  } catch (err) {
+    return { output: `XTimeline error: ${(err as Error).message}`, isError: true };
+  }
+  const result = await runTwitterCli('XTimeline', args, ctx, outputPath);
+  if (result.isError) return result;
+
+  const posts = parseXPostsFromYaml(result.output);
+  if (posts.length > 0) {
+    const refId = `xposts-${Date.now()}`;
+    const structuredBlocks: StructuredBlock[] = [{
+      refId,
+      type: 'x_posts',
+      title: following ? 'X タイムライン（フォロー中）' : 'X タイムライン（For You）',
+      data: { query: following ? 'following' : 'for_you', posts },
+    }];
+    return { output: `${result.output}\n\n[[embed:${refId}]]`, isError: false, structuredBlocks };
+  }
+  return result;
+}
+
 async function executeXPostDetail(input: Record<string, unknown>, ctx: ToolContext): Promise<ToolResult> {
   const tweet = String(input['tweet'] ?? '').trim();
   if (!tweet) return { output: 'XPostDetail error: tweet is required', isError: true };
@@ -862,6 +911,8 @@ export async function executeTool(
       return executeXSearch(input, ctx);
     case 'XUserPosts':
       return executeXUserPosts(input, ctx);
+    case 'XTimeline':
+      return executeXTimeline(input, ctx);
     case 'XPostDetail':
       return executeXPostDetail(input, ctx);
     case 'XFetchCardMedia':

src/metrics/tool-name-allowlist.ts

@@ -57,7 +57,7 @@ const BUILTIN_TOOL_NAMES_LIST: ReadonlyArray<string> = [
   // orchestration.ts
   'SpawnSubTask',
   // x.ts
-  'XPostDetail', 'XSearch', 'XUserPosts',
+  'XPostDetail', 'XSearch', 'XTimeline', 'XUserPosts',
   // maps.ts
   'GetDirections', 'ReverseGeocode', 'SearchPlaces',
   // youtube.ts

src/ssh/console-session.test.ts

@@ -13,6 +13,11 @@ class StubChannel extends EventEmitter {
   }
 }
 
+class StubClient extends EventEmitter {
+  ended = false;
+  end(): void { this.ended = true; this.emit('close'); }
+}
+
 function mkAudit() {
   return {
     beginAndComplete: vi.fn(),
@@ -21,7 +26,7 @@ function mkAudit() {
   };
 }
 
-function mkSession(channel: StubChannel) {
+function mkSession(channel: StubChannel, client: StubClient = new StubClient()) {
   const audit = mkAudit();
   const session = new ConsoleSession({
     localTaskId: 't1',
@@ -32,9 +37,10 @@ function mkSession(channel: StubChannel) {
     rows: 24,
     scrollbackCap: 1024,
     channel: channel as any,
+    client: client as any,
     auditRepo: audit as any,
   });
-  return { session, audit };
+  return { session, audit, client };
 }
 
 describe('ConsoleSession', () => {
@@ -131,18 +137,43 @@ describe('ConsoleSession', () => {
     expect(ch.windowChanges).toEqual([{ rows: 40, cols: 100 }]);
   });
 
-  it('close() is idempotent and records audit', async () => {
+  it('close() is idempotent, ends the client, and records audit', async () => {
     const ch = new StubChannel();
-    const { session, audit } = mkSession(ch);
+    const { session, audit, client } = mkSession(ch);
     await session.close('idle_timeout');
     await session.close('idle_timeout');
     expect(ch.ended).toBe(true);
+    expect(client.ended).toBe(true);
     expect(audit.beginAndComplete).toHaveBeenCalledTimes(1);
     const call = audit.beginAndComplete.mock.calls[0]![0];
     expect(call.action).toBe('ssh.console.close');
     expect(call.detail.reason).toBe('idle_timeout');
   });
 
+  it('client "error" (ECONNRESET) tears the session down without throwing', async () => {
+    const ch = new StubChannel();
+    const { session, audit, client } = mkSession(ch);
+    // Regression for #407: an unhandled ssh2 Client 'error' event crashes
+    // the whole Node process. ConsoleSession must own a listener so a
+    // dropped transport closes only this session.
+    expect(() => client.emit('error', new Error('read ECONNRESET'))).not.toThrow();
+    // close() runs on the next tick via the catch-less promise chain.
+    await Promise.resolve();
+    expect(session.isClosed).toBe(true);
+    expect(audit.beginAndComplete).toHaveBeenCalledTimes(1);
+    expect(audit.beginAndComplete.mock.calls[0]![0].detail.reason).toBe('host_disconnect');
+  });
+
+  it('client "close" tears the session down once', async () => {
+    const ch = new StubChannel();
+    const { session, audit, client } = mkSession(ch);
+    client.emit('close');
+    await Promise.resolve();
+    expect(session.isClosed).toBe(true);
+    expect(audit.beginAndComplete).toHaveBeenCalledTimes(1);
+    expect(audit.beginAndComplete.mock.calls[0]![0].detail.reason).toBe('host_disconnect');
+  });
+
   it('scrollback caps at scrollbackCap', () => {
     const ch = new StubChannel();
     const { session } = mkSession(ch);

src/ssh/console-session.ts

@@ -1,6 +1,6 @@
 import { createRequire } from 'node:module';
 import type { Terminal as HeadlessTerminalType } from '@xterm/headless';
-import type { ClientChannel } from 'ssh2';
+import type { Client, ClientChannel } from 'ssh2';
 import { ByteRingBuffer } from './ring-buffer.js';
 /** Where an input chunk came from — drives audit `source` + back-pressure label. */
 export type InputSource = 'human' | 'ai';
@@ -26,6 +26,13 @@ export interface ConsoleSessionArgs {
   rows: number;
   scrollbackCap: number;
   channel: ClientChannel;
+  /**
+   * The ssh2 Client backing `channel`. The session owns it: it ends the
+   * client on close() (so the underlying connection/socket doesn't leak)
+   * and reacts to client-level 'error'/'close' so a dropped transport tears
+   * the session down instead of leaving a half-dead session registered.
+   */
+  client: Client;
   auditRepo: SshAuditRepo;
 }
 
@@ -108,6 +115,7 @@ export class ConsoleSession {
   rows: number;
 
   private readonly channel: ClientChannel;
+  private readonly client: Client;
   private readonly headless: HeadlessTerminal;
   private readonly scrollback: ByteRingBuffer;
   private readonly auditRepo: SshAuditRepo;
@@ -131,6 +139,7 @@ export class ConsoleSession {
     this.cols = args.cols;
     this.rows = args.rows;
     this.channel = args.channel;
+    this.client = args.client;
     this.scrollback = new ByteRingBuffer(args.scrollbackCap);
     this.auditRepo = args.auditRepo;
     this.headless = new HeadlessTerminal({
@@ -144,14 +153,30 @@ export class ConsoleSession {
     });
 
     this.channel.on('data', (data: Buffer) => this.handleOutput(data));
-    this.channel.on('close', () => {
-      if (!this.closing) {
+    this.channel.on('close', () => this.onTransportDown());
+
+    // The Client (connection) can fail independently of the channel:
+    // ssh2 re-emits transport-level socket errors (ECONNRESET on idle
+    // timeout, network drop) as an 'error' on the Client. Without a
+    // listener Node treats an 'error' event as fatal and kills the whole
+    // process — this handler keeps a dropped connection to a single
+    // session-scoped teardown. 'close' covers a graceful peer disconnect.
+    this.client.on('error', (e: Error) => {
+      logger.warn(
+        `[console-session] client error task=${this.localTaskId}: ${(e as Error).message}`,
+      );
+      this.onTransportDown();
+    });
+    this.client.on('close', () => this.onTransportDown());
+  }
+
+  /** Tear the session down once when the underlying SSH transport drops. */
+  private onTransportDown(): void {
+    if (this.closing) return;
     this.close('host_disconnect').catch((e) =>
       logger.warn(`[console-session] close error: ${(e as Error).message}`),
     );
   }
-    });
-  }
 
   get lastActivityAt(): number {
     return this._lastActivityAt;
@@ -275,6 +300,15 @@ export class ConsoleSession {
       } catch {
         /* already gone */
       }
+      try {
+        // End the owning Client too — channel.end() only closes the shell
+        // channel, the TCP connection stays up until the client is ended.
+        // Guarded by `closing` above so the resulting 'close' event is a
+        // no-op in onTransportDown.
+        this.client.end();
+      } catch {
+        /* already gone */
+      }
       try {
         this.headless.dispose();
       } catch {

src/ssh/session.ts

@@ -219,15 +219,42 @@ async function openClient(
     const settle = (err: Error | null) => {
       if (settled) return;
       settled = true;
-      client.removeAllListeners('ready');
-      client.removeAllListeners('error');
-      client.removeAllListeners('close');
-      if (err) reject(err);
-      else resolve(client);
+      // Detach the handshake-only listeners with the exact references
+      // (removeAllListeners would also strip the permanent error handler).
+      client.removeListener('ready', onReady);
+      client.removeListener('close', onClose);
+      if (err) {
+        // Failed handshake: the caller destroys the socket and never uses
+        // this client, so drop the error handler too.
+        client.removeListener('error', onError);
+        reject(err);
+      } else {
+        // Success: keep `onError` attached. The client can outlive this
+        // call (an interactive console keeps it alive for the whole
+        // session), and ssh2 re-emits transport-level failures
+        // (ECONNRESET on idle timeout, network drop) as an 'error' event
+        // on the Client. A Node 'error' event with no listener is fatal to
+        // the entire process — this permanent handler is the safety net
+        // that turns a dropped connection into a log line instead of a
+        // crash. The live-client owner (ConsoleSession / exec finally)
+        // drives the actual teardown.
+        resolve(client);
+      }
     };
-    client.once('ready', () => settle(null));
-    client.once('error', (err: Error) => settle(err));
-    client.once('close', () => settle(new Error('connection_closed_during_handshake')));
+    const onReady = () => settle(null);
+    const onClose = () => settle(new Error('connection_closed_during_handshake'));
+    const onError = (err: Error) => {
+      if (!settled) {
+        settle(err);
+      } else {
+        logger.warn(
+          `[ssh:session] client error after handshake conn=${connection.id}: ${sanitizeError(err).message}`,
+        );
+      }
+    };
+    client.on('error', onError);
+    client.once('ready', onReady);
+    client.once('close', onClose);
     try {
       client.connect(config);
     } catch (e) {

ui/src/components/files/FilePreview.tsx

@@ -702,7 +702,7 @@ export function FilePreview({ name, content, imageSrc, markdownImageBaseUrl, onC
             src={imageSrc}
             sandbox="allow-scripts allow-same-origin"
             className="w-full rounded-lg border-0"
-            style={{ height: '72vh' }}
+            style={{ height: '80vh' }}
             title={name}
           />
         );
@@ -713,13 +713,13 @@ export function FilePreview({ name, content, imageSrc, markdownImageBaseUrl, onC
             src={imageSrc}
             type="application/pdf"
             className="w-full rounded-lg"
-            style={{ height: '72vh' }}
+            style={{ height: '80vh' }}
           />
         );
       }
       return (
         <div className="flex justify-center">
-          <img src={imageSrc} alt={name} className="max-w-full max-h-[72vh] object-contain rounded-lg" />
+          <img src={imageSrc} alt={name} className="max-w-full max-h-[80vh] object-contain rounded-lg" />
         </div>
       );
     }
@@ -729,8 +729,9 @@ export function FilePreview({ name, content, imageSrc, markdownImageBaseUrl, onC
     return <pre className="text-xs whitespace-pre-wrap break-all">{currentContent.slice(0, 100000)}</pre>;
   })();
 
-  const isMarkdown = /\.(md|markdown)$/i.test(name);
-  const modalWidth = isMarkdown ? 'min(1400px, 96vw)' : 'min(1000px, 94vw)';
+  // All preview types share the wide modal so HTML / PDF / images / tables get
+  // the same generous viewport as Markdown (previously non-MD was ~40% narrower).
+  const modalWidth = 'min(1400px, 96vw)';
 
   return (
     <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50 p-[env(safe-area-inset-top)_env(safe-area-inset-right)_env(safe-area-inset-bottom)_env(safe-area-inset-left)]" onClick={onClose}>