README: regenerate marker block to pick up new MCP tip from shortcuts.ts

Auto-merge of the .mcpb commit captured the new tip body in shortcuts.ts
but left the old text inside the README's <!-- SHORTCUTS:START --> block.
Running pnpm gen:readme syncs them — proves the new workflow.

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

.gitignore

@@ -1,6 +1,7 @@
 # Node / build
 node_modules/
 dist/
+dist-mcpb/
 .svelte-kit/
 .pnpm-store/
 *.tsbuildinfo

README.md

@@ -21,25 +21,72 @@ A Windows desktop app for running and arranging many WSL terminals at once. Buil
 
 ## Using it
 
-### Keyboard shortcuts
+### Shortcuts and tips
+
+<!-- SHORTCUTS:START -->
+
+#### Keyboard shortcuts
+
+**Layout**
 
 | Key | Action |
 |---|---|
-| `Ctrl+K` | open the jump-to-pane palette (fuzzy match over label / distro / cwd; `↑`/`↓` to move, `Enter` to focus, `Esc` to close) |
-| `Ctrl+Shift+E` | split active pane to the right |
-| `Ctrl+Shift+O` | split active pane downward |
-| `Ctrl+Shift+W` | close active pane |
-| `Ctrl+Shift+P` | promote active pane out one level — turns a nested pane into a full row/column (e.g. nested-right `c` becomes a full-width bottom row). Self-inverse. |
-| `Ctrl+Shift+B` | toggle broadcast on active pane |
-| `Ctrl+Shift+Alt+B` | toggle broadcast on ALL panes (same as the titlebar 📡 button) |
-| `Ctrl+Shift+←` / `→` / `↑` / `↓` | focus neighbour pane in that direction |
-| `Ctrl+=` / `Ctrl+-` / `Ctrl+0` | zoom the active pane in / out / back to default |
-| `Ctrl+Shift+=` / `Ctrl+Shift+-` / `Ctrl+Shift+0` | same, applied to **every** pane (shift = "to all") |
+| `Ctrl+Shift+E` | Split active pane to the right |
+| `Ctrl+Shift+O` | Split active pane downward |
+| `Ctrl+Shift+W` | Close active pane |
+| `Ctrl+Shift+P` | Promote active pane out one level (turns a nested pane into a full row/column; self-inverse) |
+
+**Navigation**
+
+| Key | Action |
+|---|---|
+| `Ctrl+K` | Open jump-to-pane palette |
+| `Ctrl+Shift+← / → / ↑ / ↓` | Focus neighbour pane in that direction |
+
+**Broadcast**
+
+| Key | Action |
+|---|---|
+| `Ctrl+Shift+B` | Toggle broadcast on active pane |
+| `Ctrl+Shift+Alt+B` | Toggle broadcast on ALL panes (same as titlebar 📡) |
+
+**Font size**
+
+| Key | Action |
+|---|---|
+| `Ctrl+= / Ctrl+- / Ctrl+0` | Zoom active pane in / out / reset |
+| `Ctrl+Shift+= / Ctrl+Shift+- / Ctrl+Shift+0` | Same, applied to every pane |
+
+**Terminal**
+
+| Key | Action |
+|---|---|
+| `Ctrl+Shift+C / Ctrl+Shift+V` | Copy selection / paste in terminal |
+
+**Help**
+
+| Key | Action |
+|---|---|
+| `F1` | Show this help overlay |
+
+#### Tips
+
+- **Per-pane shell picker** — Click the distro chip in any pane's toolbar to switch between WSL distros, PowerShell, or a saved SSH host. The pane respawns with the new shell.
+- **SSH host manager** — Titlebar 🔑 SSH hosts opens the manager. Add hostname / user / port / identity file / jump host / extra ssh args. Saved hosts appear in every pane's dropdown.
+- **Saved passwords** — Optionally save a host's password — stored in Windows Credential Manager (DPAPI-encrypted), never written to hosts.json. When ssh prompts on connect it's typed automatically. Hosts with a saved password show 🔒 in the list.
+- **Clickable links** — http and https URLs in terminal output get underlined and open in your default browser on click.
+- **Drag pane headers to swap** — Grab a pane's title bar and drag it onto another pane to swap their tree positions. Useful for reorganizing without keyboard.
+- **Workspace persistence** — Layout, labels, distro choices, and SSH hosts auto-save to %APPDATA%/com.megaproxy.tiletopia (debounced 500ms). Closed panes don't come back — only the structure is restored, shells spawn fresh on next launch.
+- **MCP server (let Claude drive the workspace)** — Titlebar 🤖 opens the MCP control panel. Start the server, then for Claude Desktop click 'Download .mcpb' and drag the file into Settings → Extensions — zero-config because the bundle reads your bearer token from %APPDATA% at launch (no copy-paste, survives token rotation). For Claude Code (terminal CLI) use the fallback snippet in the panel: it wires npx mcp-remote as a stdio shim because Claude Code's HTTP-MCP client ignores static bearer auth and tries OAuth instead. URL + token persist across restarts; Regenerate the token in the panel if it leaks. Default-deny per pane: toggle 🤖 on each pane's toolbar to expose it to MCP.
+
+<!-- SHORTCUTS:END -->
 
 Shortcuts work while a terminal is focused — we capture the key before xterm.js sees it. They don't fire while you're typing into a label edit or the palette input, so those still work normally. `Ctrl` and `⌘` (Cmd) are interchangeable.
 
 Font size persists per pane in `workspace.json`, so a zoomed pane stays zoomed across restarts.
 
+> The shortcut tables and tips above are generated from `src/lib/shortcuts.ts` (the single source of truth shared with the in-app help overlay). To change them, edit that file and run `pnpm gen:readme`.
+
 ### Mouse + toolbar
 
 - **Split panes** — `⇥` in the pane toolbar splits right, `⇣` splits down. The new pane inherits the parent's distro; the cwd defaults to `~` in the WSL distro.
@@ -67,9 +114,25 @@ The titlebar 🤖 button opens a small panel that starts an MCP (Model Context P
 - **Saved SSH passwords are never exposed** through the MCP surface.
 - **Bound to all interfaces** (`0.0.0.0`). The bearer token is the only auth — don't enable the server on an untrusted network.
 
-#### Claude Code setup (via `mcp-remote` stdio shim)
+#### Claude Desktop setup (one-click via `.mcpb` bundle — recommended)
 
-Claude Code's HTTP-MCP client currently tries OAuth discovery and ignores static `headers` auth (Anthropic [#17152](https://github.com/anthropics/claude-code/issues/17152), [#46879](https://github.com/anthropics/claude-code/issues/46879)). The [`mcp-remote`](https://www.npmjs.com/package/mcp-remote) stdio shim transparently proxies the HTTP endpoint with the bearer header attached, sidestepping the OAuth flow.
+The MCP panel has a **Download .mcpb** button that fetches a packaged Claude Desktop extension (an `.mcpb` file). Drag it into Claude Desktop's *Settings → Extensions* pane and Claude will auto-discover tiletopia — no config editing, no copy-pasting tokens.
+
+The bundle ships a tiny wrapper that reads your per-install bearer token straight from `%APPDATA%\com.megaproxy.tiletopia\mcp.json` at launch, so:
+
+- It carries **no secrets** — the same file works for every tiletopia install.
+- **Token regeneration** in the panel keeps working transparently; the next time Claude Desktop launches the extension, it'll pick up the new token.
+- Requires `npx` (Node 18+) on PATH because the wrapper still talks to tiletopia through `mcp-remote` (same reason as the manual recipe below).
+
+You can also rebuild the bundle from source:
+
+```sh
+pnpm run build:mcpb     # writes dist-mcpb/tiletopia.mcpb
+```
+
+#### Claude Code setup (via `mcp-remote` stdio shim — fallback / manual recipe)
+
+Claude Code (the terminal CLI) doesn't accept `.mcpb` bundles yet, and its HTTP-MCP client currently tries OAuth discovery and ignores static `headers` auth (Anthropic [#17152](https://github.com/anthropics/claude-code/issues/17152), [#46879](https://github.com/anthropics/claude-code/issues/46879)). The [`mcp-remote`](https://www.npmjs.com/package/mcp-remote) stdio shim transparently proxies the HTTP endpoint with the bearer header attached, sidestepping the OAuth flow.
 
 The panel's config snippet uses this shim by default — paste it into your project's `.mcp.json`:
 

memory.md

@@ -29,7 +29,8 @@ Durable memory for this project. Read at session start, update before session en
 - [x] ~~**M4 — orchestration.** Broadcast input, idle notifications, Ctrl+K palette.~~ Done 2026-05-22.
 - [x] ~~**Auto-save debouncing.**~~ 500ms timer in `App.svelte` `$effect`.
 - [x] ~~**HMR distro picker reset.**~~ No longer an issue — per-pane distro selection.
-- [ ] **Idle detection: filter by "claude is foreground."** Currently every pane notifies after 5s silence, which fires too eagerly when the user is reading a `claude` response. Want to detect that `claude` (or any user-specified process) is actually running in the pane's shell before notifying. Needs a Rust-side probe over WSL: `wsl.exe -d <distro> ps --ppid <shell_pid> -o comm=`. Defer to a future polish pass.
+- [x] ~~**Idle detection: filter by "claude is foreground."** Currently every pane notifies after 5s silence, which fires too eagerly when the user is reading a `claude` response. Want to detect that `claude` (or any user-specified process) is actually running in the pane's shell before notifying.~~ Done 2026-05-26 — per-distro probe via `wsl.exe -d <distro> -- pgrep -x claude`, cached 3s on the Rust side. WSL panes only; PS + SSH fall back to legacy always-notify. Watched list hardcoded to `["claude"]` — `[[user-watch-list]]` follow-up below.
+- [ ] **`[[user-watch-list]]` — user-configurable idle-suppress process list.** v1 hardcodes `DEFAULT_WATCH_PROCESSES = ["claude"]` in `src-tauri/src/probe.rs`. Move to a workspace-config field (or dedicated `watch.json`) so users can add `cargo`, `npm test`, `pytest`, etc. without a recompile. Two design notes: (1) the values are passed straight to `pgrep -x`, so user-supplied strings must be validated (no shell metachars / leading `-`) before reaching `probe_one`; (2) the cache key is currently just the distro name — if the watched-list becomes per-pane / per-workspace, key the cache by `(distro, sorted_watch_list)` to prevent stale answers.
 - [ ] **Native OS notifications.** Right now toasts only show while the app is focused. `tauri-plugin-notification` would push to Windows Action Center; useful for "claude finished" when the app is minimized. Worth adding if/when the user actually backgrounds the app while waiting for sessions.
 - [ ] **Configurable idle threshold.** Hardcoded 5000ms in `LeafPane.svelte`. Should move into a settings panel; M5 territory.
 - [x] ~~**Logic tests for `tree.ts`.**~~ Vitest, 43 cases, runs via `pnpm test`. Done 2026-05-22.
@@ -52,6 +53,94 @@ Durable memory for this project. Read at session start, update before session en
 
 ## Session log
 
+### 2026-05-26 — Idle filter: suppress when `claude` is running in the distro
+
+The idle indicator used to fire 5s after any silence, regardless of what the pane was doing. While the user reads a long `claude` response the pane is silent (claude is processing or the human is reading) and the red border + titlebar "N idle" count is just noise. Fixed: WSL panes now probe the backend before flagging idle, and stay quiet if `claude` is running anywhere in the distro.
+
+**Granularity is per-distro, not per-pane.** Identifying which Windows pane corresponds to which Linux-side shell inside WSL is too complex (PIDs aren't visible from Windows; ProcMon-style probes are fragile). Agreed trade-off: if claude is running in distro X, ALL panes in distro X suppress. Over-suppression for multi-pane-same-distro users is fine — the previous always-notify bug was worse, and that user pattern is the minority.
+
+**Architecture:**
+
+1. New `src-tauri/src/probe.rs` module with `ProbeCache` — `parking_lot::Mutex<HashMap<String, (Instant, bool)>>` keyed by distro name, 3s TTL. Sized against the frontend's 1s idle-tick: ~one `wsl.exe` call per distro per 3 ticks even with many panes polling, while reacting to "claude finished" within a few seconds.
+2. Probe command runs `wsl.exe -d <distro> -- pgrep -x claude` via `quiet_command_pub` (new public alias of the existing `quiet_command` in pty.rs so cross-module callers don't re-implement the `CREATE_NO_WINDOW` dance). Exit 0 = match, exit 1 = no match, anything else = probe failure.
+3. **Fail-safe is suppression.** Any probe error (wsl.exe missing, distro stopped, pgrep not installed) resolves to `true` → frontend suppresses the idle indicator. Matches the agreed trade-off: over-suppression beats false-positive notifications.
+4. New Tauri command `is_watch_process_running(distro)`. Wrapped in `tokio::task::spawn_blocking` because the shell-out can take 100-300ms — keep it off the async runtime's thread pool.
+5. `LeafPane.tsx` idle-detection effect rewritten: when the tick says "now idle", branch by `shellKind`. WSL → probe backend, suppress if true. PowerShell + SSH → skip the probe and fall back to legacy behaviour (PS has no portable `ps`; SSH processes live on a remote box; out of scope for v1). Includes `inFlight` guard so a slow probe doesn't stack with subsequent ticks, and a `cancelled` flag for the React-18-StrictMode cleanup pattern we always use here.
+
+**Watched list is currently hardcoded.** `DEFAULT_WATCH_PROCESSES: &[&str] = &["claude"]` in probe.rs. Comment marks the v2 follow-up: surface as a workspace-config field, key the cache by `(distro, sorted_list)` if it becomes per-pane, and validate user-supplied strings against `pgrep` shell-injection (no `-` prefix, no shell metachars).
+
+**Files touched:**
+
+- `src-tauri/src/probe.rs` — new module (~150 lines).
+- `src-tauri/src/pty.rs` — `quiet_command_pub` exposed for cross-module use.
+- `src-tauri/src/lib.rs` — register the module, the `ProbeCache` state, and the command in `invoke_handler`.
+- `src-tauri/src/commands.rs` — `is_watch_process_running` Tauri command.
+- `src/ipc.ts` — `isWatchProcessRunning` TS wrapper.
+- `src/lib/layout/LeafPane.tsx` — idle-detection effect now branches on shellKind and gates WSL transitions through the probe.
+
+**Validated:**
+
+- `pnpm check` clean (0 errors).
+- `pnpm test` clean (72 tree.ts tests pass — no UI tests yet, so the React-side change isn't covered automatically).
+- Rust side authored in WSL; user to run `cargo build / cargo check -p tiletopia_lib` from Windows before merging.
+
+Open follow-ups specific to this session:
+
+- **`[[user-watch-list]]` config surface.** See open-questions section above. Probably 30 min of work: add `watchProcesses?: string[]` to workspace.json, validate per-name (no `-`, no shell metachars, length cap), thread through to a new `is_watch_process_running_for` command that takes the list, key the cache by `(distro, sorted_list_hash)`.
+- **Probe latency-as-jitter.** First idle tick after 5s silence triggers a 100-300ms `wsl.exe` shell-out. The user sees the red border flicker on for ~one tick before the probe resolves and clears it. Not visually obvious in practice (the red is already a transient signal), but could pre-warm the cache on a slower interval if it bites.
+- **PowerShell idle filter.** PS has no `ps` equivalent we can probe cheaply; closest is `Get-Process` + a watched-list mapping (`claude` doesn't exist on Windows, but `cargo`, `npm`, `python` do). Defer until someone actually runs a long-running CLI in PS and complains.
+- **Workspace-edit migration of the `LeafPane.svelte` mention** in the open-question section about the 5000ms threshold — file says `.svelte` but we're React now. Drive-by, not done here ("don't refactor unrelated code").
+### 2026-05-26 — README shortcut table now generated from `shortcuts.ts`
+
+The keyboard-shortcut table in README and the in-app help overlay used to be hand-mirrored copies maintained by "keep in sync" comments. They drifted (most recently the navigation/font-size entries diverged). Now `src/lib/shortcuts.ts` is the single source of truth and README's section is generated from it.
+
+**Marker shape:** plain HTML comments — `<!-- SHORTCUTS:START -->` and `<!-- SHORTCUTS:END -->`. Markdown viewers render them as nothing (zero visual noise); the generator finds them by literal string match. They live under the new `### Shortcuts and tips` heading in `Using it`, with explanatory prose + a footer pointer below for readers who reach for the file.
+
+**Script:** `scripts/gen-readme-shortcuts.mjs`. Sibling to `pr4-verify.mjs` / `release.sh` / `make-icon.py`. Plain Node + `fs` only — no tsx/esbuild dep. Trick: shortcuts.ts is pure data (no React, no value imports), so the script reads it as text, strips `export interface { ... }` blocks with a brace-walker, drops the `: SomeType[]` annotations on the `export const` declarations, writes the result to a temp `.mjs` file in `os.tmpdir()`, and dynamic-imports it. Cleaner than a regex parser of the array literal because any future shape change in shortcuts.ts (adding a new field, reshuffling sections) Just Works.
+
+**Render style:** mirrors the existing README table — `| Key | Action |` two-column, keys backticked. The TS data is grouped by section, so each section gets a `**Title**` subheading + its own table. TIPS render as a `**Title** — body` bulleted list. Pipes in cell text are escaped to `\|`; newlines collapse to spaces.
+
+**Pnpm script:** `pnpm gen:readme`. Also supports `--check` mode (`node scripts/gen-readme-shortcuts.mjs --check`) which exits 1 if the README would change — wire it into CI later if drift starts mattering again.
+
+**To add or change a shortcut/tip:** edit `src/lib/shortcuts.ts`, run `pnpm gen:readme`. The help overlay updates automatically (it already imports from there); the README marker block updates from the same source. Don't hand-edit anything between the marker comments — your changes will be wiped on the next regen.
+
+**Verified:** ran twice, second run reports "already up to date" with empty `git diff`. `pnpm check` clean (tsc --noEmit, exit 0).
+
+### 2026-05-26 — `.mcpb` Claude Desktop bundle (zero-config token handling)
+
+Long-standing follow-up shipped. Build script + tiny Node wrapper produce `dist-mcpb/tiletopia.mcpb` — a one-click Claude Desktop install replacing the hand-paste of `.mcp.json`.
+
+**Key design choice — per-install token handling.** The `.mcpb` spec offers two ways to handle credentials: `user_config` prompts at install time (copy-paste), or bake them in (wrong). Both lose: copy-paste defeats the whole point of one-click, and token rotation (the Regenerate button) would silently invalidate any saved `user_config` value. Picked a **third option not in the spec docs**: bundle a tiny Node wrapper as `entry_point` that reads `%APPDATA%\com.megaproxy.tiletopia\mcp.json` at launch and execs `npx -y mcp-remote ...` with the live token. Zero secrets in the bundle → safe to publish on the releases page; works for any tiletopia install; transparently picks up the new token after Regenerate without the user re-doing anything.
+
+**Bundle shape (`scripts/build-mcpb.mjs`):**
+- `manifest.json` — `type: "node"`, `entry_point: "server/index.mjs"`, `mcp_config: { command: "node", args: ["${__dirname}/server/index.mjs"] }`, version mirrors `package.json`, icon points at the 128×128 brand PNG.
+- `server/index.mjs` — the wrapper. Reads `mcp.json`, validates port + token, spawns `npx -y mcp-remote http://127.0.0.1:<port>/mcp --allow-http --header "Authorization: Bearer <token>"` with `stdio: "inherit"`, forwards SIGINT/SIGTERM/SIGHUP to clean up the child on extension disable.
+- `icon.png` — copy of `src-tauri/icons/128x128.png`.
+
+**Build path.** `pnpm run build:mcpb` → `dist-mcpb/tiletopia.mcpb` (gitignored). Pure-Node store-only ZIP writer (~70 lines, no `archiver`/`jszip` devDep). Validated end-to-end with Python `zipfile`: 3 entries, valid CRCs, manifest parses. ~9 KB output.
+
+**Distribution.** The script is committed; the artifact isn't (regenerable). The intent is to attach `tiletopia.mcpb` to each Forgejo release alongside the NSIS installer — `scripts/release.sh` doesn't do this yet (follow-up). The new "Download .mcpb" button in `McpPanel` opens the releases page; once the artifact is up there, users grab it from there.
+
+**UI changes.**
+- `McpPanel.tsx`: new "Claude Desktop (one-click install)" field above the .mcp.json snippet with a "Download .mcpb" button (opens the releases URL via `plugin-opener`) and a brief hint explaining zero-config token handling + the regen script. Styled in `McpPanel.css` (`.mcp-mcpb-row`, `.mcp-mcpb-btn`, `.mcp-mcpb-hint`).
+- `McpPanel.css`: also added an explicit `.mcp-hint` style that was previously inheriting (used by both the token hint and the .mcpb hint).
+- `shortcuts.ts`: MCP tip now leads with the `.mcpb` install path; the mcp-remote shim is described as the fallback for Claude Code (the terminal CLI, which doesn't accept `.mcpb` yet).
+- `README.md`: same restructure under the MCP section — Claude Desktop install via `.mcpb` first, Claude Code via mcp-remote second.
+
+**Why no in-app file save dialog?** I considered bundling the `.mcpb` inside the Tauri NSIS as a Rust resource + exposing a `download_mcpb` Tauri command that opens a save dialog. Would let the panel button work fully in-app. Rejected because (a) it'd require Rust changes which I can't compile-check in WSL, (b) it duplicates what releases do for free, and (c) "Download .mcpb" landing on the releases page is the more discoverable distribution flow long-term.
+
+**Confirmed: bundle contains zero secrets.** Scanned both `manifest.json` and `server/index.mjs` for `Bearer ey`, `token=`, `secret`, `password`, `api_key` — all clean. The wrapper reads the token from `%APPDATA%` at runtime on the *user's* machine; nothing is ever baked in.
+
+**`pnpm check` clean, vitest 72/72 passing.**
+
+Open follow-ups specific to this session:
+
+- **Wire `.mcpb` into the release.** `scripts/release.sh` currently uploads only the NSIS installer; it should also run `node scripts/build-mcpb.mjs` and attach the resulting `dist-mcpb/tiletopia.mcpb` to the Forgejo release. Two lines + one `tea releases create --asset` flag. Until that's done, the "Download .mcpb" button lands on a releases page where the asset doesn't exist yet for old tags.
+- **Direct in-app save flow.** If we ever want fully-offline install (no roundtrip through the web), add a Rust-side `download_mcpb` command that returns the bundled bytes + use `@tauri-apps/plugin-dialog` save() in the panel. Not blocking — current flow is sufficient and matches how Tauri apps usually distribute extension files.
+- **Pre-flight on the wrapper.** Could detect missing `npx` / Node 18+ and emit a more directed message. Currently we just let `spawn` fail with whatever Node says. The "make sure Node 18+ is installed and `npx` is on PATH" line in the error path is the band-aid.
+- **`.mcpb` for Claude Code (CLI).** Claude Code doesn't accept `.mcpb` bundles yet — Anthropic may add it. When they do, the same bundle should Just Work since the wrapper is platform-agnostic re: which Claude is calling it.
+- **Bundle compatibility field.** Manifest declares `platforms: ["win32"]` and `runtimes: { node: ">=18.0.0" }`. The wrapper has a hard `%APPDATA%` requirement so this is correct, but if anyone ever wants macOS / Linux tiletopia support, the wrapper needs a portable config-path lookup.
+
 ### 2026-05-26 — Hard-deny: PowerShell patterns + label list de-duplicated
 
 Mirrors the POSIX hard-deny rules with their Windows/PowerShell equivalents. Four new patterns:

package.json

@@ -10,6 +10,8 @@
     "test": "vitest run",
     "test:watch": "vitest",
     "check": "tsc --noEmit",
+    "build:mcpb": "node scripts/build-mcpb.mjs",
+    "gen:readme": "node scripts/gen-readme-shortcuts.mjs",
     "tauri": "tauri"
   },
   "dependencies": {

scripts/build-mcpb.mjs

@@ -0,0 +1,259 @@
+#!/usr/bin/env node
+// build-mcpb.mjs — package tiletopia's Claude Desktop MCP bundle.
+//
+// Produces dist-mcpb/tiletopia.mcpb — an .mcpb (MCP Bundle, the format
+// formerly known as DXT) zip containing:
+//   manifest.json          → declares a node-type server pointing at the wrapper
+//   server/index.mjs       → the wrapper script that reads %APPDATA% and
+//                            execs `npx -y mcp-remote ...` (see mcpb-wrapper.mjs)
+//   icon.png               → 128×128 brand icon
+//
+// Usage:
+//   pnpm run build:mcpb
+// or
+//   node scripts/build-mcpb.mjs
+//
+// Output:
+//   dist-mcpb/tiletopia.mcpb   — drag-and-drop this into Claude Desktop's
+//                                Extensions panel to install.
+//
+// Design notes:
+//   - The bundle bakes in NO secrets. The bearer token + port are read at
+//     runtime from %APPDATA%\com.megaproxy.tiletopia\mcp.json on the user's
+//     own machine. Each install of tiletopia generates its own token; the
+//     bundle is the same for everyone.
+//   - We write the zip ourselves (store-only, no compression) to avoid a
+//     devDep on archiver/jszip/etc. The MCPB spec is just a regular zip;
+//     three small files = trivial.
+//   - The manifest's `version` mirrors package.json so the panel UI can show
+//     "Bundle v0.2.3 — matches running app".
+
+import { readFile, writeFile, mkdir, stat } from "node:fs/promises";
+import { existsSync } from "node:fs";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { deflateRawSync, crc32 } from "node:zlib";
+
+const HERE = dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = resolve(HERE, "..");
+const PKG_PATH = join(REPO_ROOT, "package.json");
+const WRAPPER_PATH = join(HERE, "mcpb-wrapper.mjs");
+const ICON_PATH = join(REPO_ROOT, "src-tauri", "icons", "128x128.png");
+const OUT_DIR = join(REPO_ROOT, "dist-mcpb");
+const OUT_PATH = join(OUT_DIR, "tiletopia.mcpb");
+
+// ----------------------------------------------------------------------------
+// Read inputs
+// ----------------------------------------------------------------------------
+
+if (!existsSync(WRAPPER_PATH)) {
+  console.error(`missing wrapper: ${WRAPPER_PATH}`);
+  process.exit(1);
+}
+if (!existsSync(ICON_PATH)) {
+  console.error(`missing icon: ${ICON_PATH}`);
+  process.exit(1);
+}
+
+const pkg = JSON.parse(await readFile(PKG_PATH, "utf8"));
+const wrapperSrc = await readFile(WRAPPER_PATH);
+const iconBytes = await readFile(ICON_PATH);
+
+// ----------------------------------------------------------------------------
+// Manifest
+//
+// Schema reference: https://github.com/modelcontextprotocol/mcpb/blob/main/MANIFEST.md
+//
+// type=node + entry_point pointing at server/index.mjs + mcp_config.command
+// = "node" matches Claude Desktop's expectations. We avoid a `user_config`
+// block on purpose — the wrapper reads the token from %APPDATA% so the user
+// doesn't have to copy-paste it at install time.
+// ----------------------------------------------------------------------------
+
+const manifest = {
+  manifest_version: "0.3",
+  name: "tiletopia",
+  display_name: "tiletopia (workspace driver)",
+  version: pkg.version,
+  description:
+    "Drive your tiletopia workspace from Claude Desktop — inspect panes, " +
+    "read scrollback, reshape the layout, and (with policy approval) send " +
+    "commands.",
+  long_description:
+    "tiletopia is a Windows tiling terminal manager for WSL. This bundle " +
+    "lets Claude Desktop connect to a running tiletopia process on the same " +
+    "machine via its embedded MCP server. The bundle reads the per-install " +
+    "bearer token and port from %APPDATA%\\com.megaproxy.tiletopia\\mcp.json " +
+    "at launch, so you don't need to paste any credentials during install. " +
+    "Start the MCP server once from tiletopia's 🤖 panel (Server: ON), then " +
+    "drop this bundle into Claude Desktop and it will connect automatically. " +
+    "All write operations (spawn, write keystrokes, reshape) are gated by " +
+    "the per-pane allow-list and the user-editable policy inside tiletopia.",
+  author: {
+    name: "megaproxy",
+    url: "https://git.rdx4.com/megaproxy/tiletopia",
+  },
+  repository: {
+    type: "git",
+    url: "https://git.rdx4.com/megaproxy/tiletopia.git",
+  },
+  homepage: "https://git.rdx4.com/megaproxy/tiletopia",
+  documentation: "https://git.rdx4.com/megaproxy/tiletopia#mcp-server-claude-can-drive-the-workspace",
+  support: "https://git.rdx4.com/megaproxy/tiletopia/issues",
+  icon: "icon.png",
+  server: {
+    type: "node",
+    entry_point: "server/index.mjs",
+    mcp_config: {
+      command: "node",
+      args: ["${__dirname}/server/index.mjs"],
+    },
+  },
+  keywords: ["tiletopia", "wsl", "terminal", "mcp", "claude"],
+  license: "Proprietary",
+  compatibility: {
+    // Claude Desktop runtime requirements — the bundle launches node, which
+    // shells out to npx mcp-remote; both need Node 18+ on PATH.
+    platforms: ["win32"],
+    runtimes: {
+      node: ">=18.0.0",
+    },
+  },
+};
+
+const manifestBytes = Buffer.from(JSON.stringify(manifest, null, 2), "utf8");
+
+// ----------------------------------------------------------------------------
+// Build the .mcpb zip
+//
+// The MCPB spec is a plain ZIP file. We're writing three small files, so a
+// pure-Node store-only writer is simplest. Avoids adding archiver as a
+// devDep. Format reference: APPNOTE.TXT 6.3.4 sections 4.3 (local file
+// header), 4.4 (data descriptor), 4.5 (central directory).
+// ----------------------------------------------------------------------------
+
+const SIG_LFH = 0x04034b50;
+const SIG_CDH = 0x02014b50;
+const SIG_EOCD = 0x06054b50;
+
+function dosTimeDate(date) {
+  // DOS time/date format (2-second resolution; epoch 1980-01-01).
+  const yr = Math.max(date.getFullYear(), 1980) - 1980;
+  const time =
+    ((date.getHours() & 0x1f) << 11) |
+    ((date.getMinutes() & 0x3f) << 5) |
+    ((Math.floor(date.getSeconds() / 2)) & 0x1f);
+  const dt =
+    ((yr & 0x7f) << 9) |
+    (((date.getMonth() + 1) & 0x0f) << 5) |
+    (date.getDate() & 0x1f);
+  return { time, date: dt };
+}
+
+function buildZip(entries) {
+  const now = dosTimeDate(new Date());
+  const chunks = [];
+  const centralDir = [];
+  let offset = 0;
+
+  for (const { name, data } of entries) {
+    const nameBuf = Buffer.from(name, "utf8");
+    const crc = crc32(data); // store-only — uncompressed crc == compressed crc
+    const size = data.length;
+
+    // Local file header (4.3.7)
+    const lfh = Buffer.alloc(30);
+    lfh.writeUInt32LE(SIG_LFH, 0);
+    lfh.writeUInt16LE(20, 4); // version needed (2.0)
+    lfh.writeUInt16LE(0, 6); // general purpose bit flag
+    lfh.writeUInt16LE(0, 8); // compression: store
+    lfh.writeUInt16LE(now.time, 10);
+    lfh.writeUInt16LE(now.date, 12);
+    lfh.writeUInt32LE(crc, 14);
+    lfh.writeUInt32LE(size, 18); // compressed size (== size for store)
+    lfh.writeUInt32LE(size, 22); // uncompressed size
+    lfh.writeUInt16LE(nameBuf.length, 26);
+    lfh.writeUInt16LE(0, 28); // extra field length
+    chunks.push(lfh, nameBuf, data);
+
+    // Central directory header (4.4.7)
+    const cdh = Buffer.alloc(46);
+    cdh.writeUInt32LE(SIG_CDH, 0);
+    cdh.writeUInt16LE(20, 4); // version made by
+    cdh.writeUInt16LE(20, 6); // version needed
+    cdh.writeUInt16LE(0, 8); // gp flag
+    cdh.writeUInt16LE(0, 10); // compression
+    cdh.writeUInt16LE(now.time, 12);
+    cdh.writeUInt16LE(now.date, 14);
+    cdh.writeUInt32LE(crc, 16);
+    cdh.writeUInt32LE(size, 20); // compressed size
+    cdh.writeUInt32LE(size, 24); // uncompressed
+    cdh.writeUInt16LE(nameBuf.length, 28);
+    cdh.writeUInt16LE(0, 30); // extra len
+    cdh.writeUInt16LE(0, 32); // comment len
+    cdh.writeUInt16LE(0, 34); // disk number
+    cdh.writeUInt16LE(0, 36); // internal attrs
+    cdh.writeUInt32LE(0, 38); // external attrs
+    cdh.writeUInt32LE(offset, 42); // local header offset
+    centralDir.push(cdh, nameBuf);
+
+    offset += lfh.length + nameBuf.length + data.length;
+  }
+
+  const cdStart = offset;
+  for (const buf of centralDir) {
+    chunks.push(buf);
+    offset += buf.length;
+  }
+  const cdSize = offset - cdStart;
+
+  // End of central directory record (4.5)
+  const eocd = Buffer.alloc(22);
+  eocd.writeUInt32LE(SIG_EOCD, 0);
+  eocd.writeUInt16LE(0, 4); // disk number
+  eocd.writeUInt16LE(0, 6); // start disk
+  eocd.writeUInt16LE(entries.length, 8); // entries on this disk
+  eocd.writeUInt16LE(entries.length, 10); // total entries
+  eocd.writeUInt32LE(cdSize, 12);
+  eocd.writeUInt32LE(cdStart, 16);
+  eocd.writeUInt16LE(0, 20); // comment length
+  chunks.push(eocd);
+
+  // Silence the "unused on store path" lint trip; deflateRawSync stays
+  // imported so a future maintainer who wants to add compression doesn't
+  // have to re-figure out the right symbol.
+  void deflateRawSync;
+
+  return Buffer.concat(chunks);
+}
+
+const entries = [
+  { name: "manifest.json", data: manifestBytes },
+  { name: "server/index.mjs", data: wrapperSrc },
+  { name: "icon.png", data: iconBytes },
+];
+
+const zipBytes = buildZip(entries);
+
+await mkdir(OUT_DIR, { recursive: true });
+await writeFile(OUT_PATH, zipBytes);
+
+const sizeKB = (zipBytes.length / 1024).toFixed(1);
+console.log(`wrote ${OUT_PATH} (${sizeKB} KB, ${entries.length} entries)`);
+for (const e of entries) {
+  console.log(`  ${e.name.padEnd(20)} ${e.data.length} bytes`);
+}
+console.log(
+  `manifest version ${manifest.version} (mirrors package.json); ` +
+    "to install, drag the .mcpb file into Claude Desktop's Extensions panel.",
+);
+
+// Touch stat() so any "wrote nothing" CI bug surfaces here, not at the user's
+// next install.
+const written = await stat(OUT_PATH);
+if (written.size !== zipBytes.length) {
+  console.error(
+    `size mismatch: wrote ${zipBytes.length} bytes, file is ${written.size}`,
+  );
+  process.exit(1);
+}

scripts/gen-readme-shortcuts.mjs

@@ -0,0 +1,170 @@
+#!/usr/bin/env node
+// gen-readme-shortcuts.mjs — regenerate README.md's shortcut + tips section
+// from src/lib/shortcuts.ts (the single source of truth used by the in-app
+// help overlay).
+//
+// Usage:
+//   node scripts/gen-readme-shortcuts.mjs           # rewrite README
+//   node scripts/gen-readme-shortcuts.mjs --check   # exit 1 if README would change
+//
+// To extend: add or edit entries in src/lib/shortcuts.ts, then run this
+// script. The README marker block <!-- SHORTCUTS:START --> ... <!-- SHORTCUTS:END -->
+// is replaced atomically; the rest of the README is left alone.
+
+import { readFile, writeFile, mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join, dirname, resolve } from "node:path";
+import { fileURLToPath, pathToFileURL } from "node:url";
+
+const HERE = dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = resolve(HERE, "..");
+const SHORTCUTS_TS = join(REPO_ROOT, "src", "lib", "shortcuts.ts");
+const README_PATH = join(REPO_ROOT, "README.md");
+
+const START_MARKER = "<!-- SHORTCUTS:START -->";
+const END_MARKER = "<!-- SHORTCUTS:END -->";
+
+const CHECK_MODE = process.argv.includes("--check");
+
+// ----------------------------------------------------------------------------
+// Load shortcuts.ts as data. The file is pure data exports — no React, no
+// runtime imports — so we can strip TypeScript-only syntax with regex, drop
+// the result into a temp .mjs file, and dynamically import it. Cheaper than
+// pulling in tsx/esbuild as a devDep just for this one script.
+// ----------------------------------------------------------------------------
+async function loadShortcutsModule() {
+  const src = await readFile(SHORTCUTS_TS, "utf8");
+  // Strip `export interface { ... }` blocks (handles nested braces by
+  // walking; the file has flat interfaces today so a brace-counter is enough).
+  const stripped = stripInterfaceDecls(src)
+    // Drop `: TypeAnnotation` on the export declarations
+    // (e.g. `export const SHORTCUT_SECTIONS: ShortcutSection[] = [...]`).
+    .replace(/^(export\s+const\s+\w+)\s*:\s*[^=]+?=/gm, "$1 =");
+
+  const dir = await mkdtemp(join(tmpdir(), "tiletopia-genreadme-"));
+  const tmpFile = join(dir, "shortcuts.mjs");
+  try {
+    await writeFile(tmpFile, stripped, "utf8");
+    return await import(pathToFileURL(tmpFile).href);
+  } finally {
+    await rm(dir, { recursive: true, force: true });
+  }
+}
+
+function stripInterfaceDecls(src) {
+  let out = "";
+  let i = 0;
+  while (i < src.length) {
+    const match = src.slice(i).match(/^export\s+interface\s+\w+\s*\{/m);
+    if (!match) {
+      out += src.slice(i);
+      break;
+    }
+    const localStart = src.indexOf(match[0], i);
+    out += src.slice(i, localStart);
+    // Walk braces to find the end of the interface block.
+    let depth = 0;
+    let j = localStart + match[0].length - 1; // points at the opening `{`
+    for (; j < src.length; j++) {
+      const c = src[j];
+      if (c === "{") depth++;
+      else if (c === "}") {
+        depth--;
+        if (depth === 0) {
+          j++;
+          break;
+        }
+      }
+    }
+    i = j;
+  }
+  return out;
+}
+
+// ----------------------------------------------------------------------------
+// Render the markdown block. Mirrors the README's existing table style:
+//   - 2-column `| Key | Action |` table
+//   - keys wrapped in backticks
+//   - description in plain prose
+// Tips render as a `#### Title` heading plus a paragraph.
+// ----------------------------------------------------------------------------
+function renderBlock({ SHORTCUT_SECTIONS, TIPS }) {
+  const lines = [];
+  lines.push("");
+  lines.push("#### Keyboard shortcuts");
+  lines.push("");
+  for (const section of SHORTCUT_SECTIONS) {
+    lines.push(`**${section.title}**`);
+    lines.push("");
+    lines.push("| Key | Action |");
+    lines.push("|---|---|");
+    for (const item of section.items) {
+      lines.push(`| \`${escapeCell(item.keys)}\` | ${escapeCell(item.description)} |`);
+    }
+    lines.push("");
+  }
+  lines.push("#### Tips");
+  lines.push("");
+  for (const tip of TIPS) {
+    lines.push(`- **${escapeInline(tip.title)}** — ${escapeInline(tip.body)}`);
+  }
+  lines.push("");
+  return lines.join("\n");
+}
+
+// Cell values must not contain raw pipes (would break the table) or newlines.
+function escapeCell(s) {
+  return s.replace(/\|/g, "\\|").replace(/\n/g, " ");
+}
+
+// Body text gets newlines collapsed but pipes kept (lists, not tables).
+function escapeInline(s) {
+  return s.replace(/\n/g, " ");
+}
+
+// ----------------------------------------------------------------------------
+// Splice the generated block into the README between the markers.
+// ----------------------------------------------------------------------------
+function spliceReadme(readme, block) {
+  const startIdx = readme.indexOf(START_MARKER);
+  const endIdx = readme.indexOf(END_MARKER);
+  if (startIdx === -1 || endIdx === -1) {
+    throw new Error(
+      `README.md is missing one of the markers (${START_MARKER} / ${END_MARKER}). ` +
+        "Add them around the section you want regenerated.",
+    );
+  }
+  if (endIdx < startIdx) {
+    throw new Error(`${END_MARKER} appears before ${START_MARKER} in README.md`);
+  }
+  const before = readme.slice(0, startIdx + START_MARKER.length);
+  const after = readme.slice(endIdx);
+  return `${before}\n${block}\n${after}`;
+}
+
+// ----------------------------------------------------------------------------
+// Main.
+// ----------------------------------------------------------------------------
+const mod = await loadShortcutsModule();
+const block = renderBlock(mod);
+const readme = await readFile(README_PATH, "utf8");
+const next = spliceReadme(readme, block);
+
+if (CHECK_MODE) {
+  if (next !== readme) {
+    process.stderr.write(
+      "README.md is out of sync with src/lib/shortcuts.ts. " +
+        "Run `pnpm gen:readme` to regenerate.\n",
+    );
+    process.exit(1);
+  }
+  process.stdout.write("README.md is in sync with src/lib/shortcuts.ts.\n");
+  process.exit(0);
+}
+
+if (next === readme) {
+  process.stdout.write("README.md already up to date.\n");
+} else {
+  await writeFile(README_PATH, next, "utf8");
+  process.stdout.write("README.md regenerated.\n");
+}

scripts/mcpb-wrapper.mjs

@@ -0,0 +1,110 @@
+#!/usr/bin/env node
+// tiletopia .mcpb wrapper — entry_point for the bundled MCP server.
+//
+// What this is: a thin stdio shim Claude Desktop launches when the user
+// installs `tiletopia.mcpb`. It reads the per-install MCP server settings
+// (port + bearer token) that the running tiletopia app persisted to
+// %APPDATA%\com.megaproxy.tiletopia\mcp.json, then execs `npx -y mcp-remote`
+// with the right URL + Authorization header. Claude talks stdio to us; we
+// proxy through mcp-remote, which talks HTTP to the tiletopia process.
+//
+// Why a wrapper (not just static args in the manifest):
+//   - The bearer token is per-install — generated at first server start, also
+//     rotated whenever the user clicks "Regenerate" in the MCP panel. We
+//     can't bake it into the bundle (that'd be wrong for every other user)
+//     and we don't want to make the user paste it into a user_config prompt
+//     at install time. Reading it from %APPDATA% at launch makes the whole
+//     thing zero-config and survives token rotation transparently.
+//   - The port may also drift (if the saved port is taken, tiletopia falls
+//     back to an OS-picked one and re-persists). Reading at launch keeps us
+//     correct across that too.
+//
+// Failure modes & messages: every error we emit goes to stderr so the user
+// sees it in Claude Desktop's extension log. We deliberately do NOT swallow
+// or transform mcp-remote's own output beyond piping it.
+
+import { spawn } from "node:child_process";
+import { readFileSync, existsSync } from "node:fs";
+import { join } from "node:path";
+
+const APPDATA = process.env.APPDATA;
+if (!APPDATA) {
+  console.error(
+    "[tiletopia-mcpb] %APPDATA% is unset — this bundle only runs on Windows.",
+  );
+  process.exit(2);
+}
+
+const CFG_PATH = join(APPDATA, "com.megaproxy.tiletopia", "mcp.json");
+if (!existsSync(CFG_PATH)) {
+  console.error(
+    `[tiletopia-mcpb] config not found at ${CFG_PATH}. ` +
+      "Launch tiletopia, open the 🤖 MCP panel, and click Server: ON at least " +
+      "once so the port + token get persisted, then retry.",
+  );
+  process.exit(3);
+}
+
+let cfg;
+try {
+  cfg = JSON.parse(readFileSync(CFG_PATH, "utf8"));
+} catch (e) {
+  console.error(`[tiletopia-mcpb] failed to read/parse ${CFG_PATH}: ${e.message}`);
+  process.exit(4);
+}
+
+const port = Number(cfg.port);
+const token = String(cfg.token ?? "");
+if (!Number.isInteger(port) || port <= 0 || port > 65535 || !token) {
+  console.error(
+    `[tiletopia-mcpb] ${CFG_PATH} is missing a valid port or token. ` +
+      "Toggle the MCP server off and on in the tiletopia panel to regenerate it.",
+  );
+  process.exit(5);
+}
+
+const url = `http://127.0.0.1:${port}/mcp`;
+
+// `npx.cmd` on Windows is the actual launcher; bare `npx` is a shim that
+// node spawns from PATH and that's also fine. spawn() with shell:true ensures
+// PATHEXT resolution picks up the .cmd correctly.
+const child = spawn(
+  "npx",
+  [
+    "-y",
+    "mcp-remote",
+    url,
+    "--allow-http",
+    "--header",
+    `Authorization: Bearer ${token}`,
+  ],
+  {
+    stdio: "inherit",
+    shell: true,
+  },
+);
+
+child.on("error", (e) => {
+  console.error(
+    `[tiletopia-mcpb] failed to spawn npx: ${e.message}. ` +
+      "Make sure Node.js 18+ is installed and `npx` is on PATH.",
+  );
+  process.exit(6);
+});
+
+child.on("exit", (code, signal) => {
+  if (signal) process.kill(process.pid, signal);
+  else process.exit(code ?? 0);
+});
+
+// Forward terminate signals to the child so Claude Desktop's "disable
+// extension" cleans up the mcp-remote subprocess.
+for (const sig of ["SIGINT", "SIGTERM", "SIGHUP"]) {
+  process.on(sig, () => {
+    try {
+      child.kill(sig);
+    } catch {
+      /* child may already be gone */
+    }
+  });
+}

src-tauri/src/commands.rs

@@ -10,6 +10,7 @@ use crate::creds;
 use crate::hosts::{self, SshHost, SshHostView};
 use crate::mcp::{self, McpMirror, McpServerHandle, McpState, PendingActions, RunningServer};
 use crate::mcp_policy::McpPolicy;
+use crate::probe::ProbeCache;
 use crate::pty::{list_wsl_distros, PaneId, PtyManager, SpawnSpec};
 
 const WORKSPACE_FILE: &str = "workspace.json";
@@ -302,3 +303,30 @@ pub async fn mcp_policy_save(app: AppHandle, policy: McpPolicy) -> Result<(), St
 pub async fn mcp_hard_deny_labels() -> Result<Vec<&'static str>, String> {
     Ok(crate::mcp_policy::hard_deny_rules().to_vec())
 }
+
+// ---- idle-detection filter -------------------------------------------------
+
+/// Probe whether any of the built-in watched processes (currently
+/// `["claude"]`) is running in the given WSL distro. Result is cached
+/// per-distro for ~3s — see {@link ProbeCache}. Fail-safe: any probe error
+/// resolves to `true` so the caller suppresses the idle indicator (the
+/// agreed trade-off; the previous "always notify" bug was worse than the
+/// occasional over-suppression).
+///
+/// Frontend only calls this for WSL panes. PowerShell + SSH skip the probe
+/// and fall back to the legacy always-notify behaviour. Empty distro names
+/// resolve to `true` (no info → fail-safe).
+#[tauri::command]
+pub async fn is_watch_process_running(
+    cache: tauri::State<'_, Arc<ProbeCache>>,
+    distro: String,
+) -> Result<bool, String> {
+    // Probe shells out — keep it off the async runtime's thread.
+    let cache_arc: Arc<ProbeCache> = (*cache).clone();
+    let running = tokio::task::spawn_blocking(move || {
+        cache_arc.is_watch_process_running(&distro)
+    })
+    .await
+    .map_err(|e| format!("probe join failed: {e}"))?;
+    Ok(running)
+}

src-tauri/src/lib.rs

@@ -5,11 +5,13 @@ mod creds;
 mod hosts;
 mod mcp;
 mod mcp_policy;
+mod probe;
 mod pty;
 
 use std::sync::Arc;
 
 use crate::mcp::{McpServerHandle, McpState, PendingActions};
+use crate::probe::ProbeCache;
 use crate::pty::PtyManager;
 
 pub fn run() {
@@ -40,6 +42,9 @@ pub fn run() {
     // Pending action registry — separate managed state so mcp_action_reply can
     // grab it without needing to lock McpState or reach into TileService.
     let pending_actions: Arc<PendingActions> = Arc::new(PendingActions::default());
+    // Idle-filter probe cache: shared across all is_watch_process_running
+    // calls so a per-distro answer is reused for a few seconds. See probe.rs.
+    let probe_cache: Arc<ProbeCache> = Arc::new(ProbeCache::new());
 
     tauri::Builder::default()
         .plugin(tauri_plugin_clipboard_manager::init())
@@ -48,6 +53,7 @@ pub fn run() {
         .manage(mcp_state)
         .manage(McpServerHandle::default())
         .manage(pending_actions)
+        .manage(probe_cache)
         .invoke_handler(tauri::generate_handler![
             commands::list_distros,
             commands::spawn_pane,
@@ -70,6 +76,7 @@ pub fn run() {
             commands::mcp_policy_load,
             commands::mcp_policy_save,
             commands::mcp_hard_deny_labels,
+            commands::is_watch_process_running,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");

src-tauri/src/probe.rs

@@ -0,0 +1,172 @@
+//! "Is a watched process running in distro X?" probe for the idle-detection
+//! filter.
+//!
+//! Background: tiletopia's idle indicator fires whenever a pane goes 5s
+//! without PTY output. When the user is reading a long `claude` response,
+//! the pane is silent but there's nothing actionable to surface — the
+//! indicator becomes noise. This module lets the frontend ask the backend
+//! "is `claude` (or any other watched process) running in this distro?"
+//! before flagging a pane idle, and suppresses the indicator if so.
+//!
+//! Granularity is per-distro, not per-pane. Identifying which Windows pane
+//! corresponds to which Linux-side shell inside the distro is too complex
+//! (PIDs aren't visible from Windows; ProcMon-style probes are fragile). If
+//! `claude` is running anywhere in distro X, idle is suppressed for ALL
+//! panes in distro X. Over-suppression for multi-pane-same-distro users is
+//! the agreed trade-off; the previous bug (always notify) was worse.
+//!
+//! PowerShell + SSH panes don't go through this probe — the frontend short-
+//! circuits to "always idle" for them. (PowerShell has no portable `ps`
+//! equivalent; SSH processes live on a remote box and would need a separate
+//! transport.)
+//!
+//! The probe shells out (`wsl.exe -d <distro> -- pgrep -x ...`), which costs
+//! ~100-300ms per call. We cache the answer per-distro for a few seconds so
+//! the frontend can poll on every idle tick without storming `wsl.exe`.
+
+use std::collections::HashMap;
+use std::time::{Duration, Instant};
+
+use parking_lot::Mutex;
+
+/// Built-in list of process names that suppress idle when running. v1 ships
+/// with just `claude`; the user can extend it via the workspace config later.
+///
+/// [[user-watch-list]] TODO: surface this as a user-editable list (workspace
+/// config field or dedicated `watch.json`). For now the constant covers the
+/// only real-world use case (Anthropic's `claude` CLI taking its time on a
+/// long response). Adding entries to the constant is the only knob.
+pub const DEFAULT_WATCH_PROCESSES: &[&str] = &["claude"];
+
+/// How long a per-distro probe result is reused before we re-shell. Sized
+/// against the frontend's 1s idle-tick interval — 3s means roughly one
+/// probe per distro per 3 ticks even with many panes polling, while still
+/// reacting to "claude just finished" within a few seconds. Trade-off: too
+/// short = wsl.exe spam, too long = stale "claude is running" once the
+/// process actually exits.
+const CACHE_TTL: Duration = Duration::from_secs(3);
+
+/// Cache entry: timestamp the probe ran + whether any watched process was
+/// found in the distro.
+#[derive(Clone, Copy)]
+struct CacheEntry {
+    at: Instant,
+    running: bool,
+}
+
+/// Per-distro probe cache. Keyed by distro name (the same string the user
+/// sees in the shell picker; the same string we pass as `wsl.exe -d`).
+pub struct ProbeCache {
+    cache: Mutex<HashMap<String, CacheEntry>>,
+}
+
+impl ProbeCache {
+    pub fn new() -> Self {
+        Self {
+            cache: Mutex::new(HashMap::new()),
+        }
+    }
+
+    /// Returns true iff one of the watched processes is running in the
+    /// distro. Cached for {@link CACHE_TTL}; cache misses (or stale entries)
+    /// trigger a fresh probe. On probe failure the result is `true` —
+    /// **fail-safe is to suppress** the idle indicator, matching the
+    /// agreed trade-off ("over-suppression beats the previous always-notify
+    /// behaviour").
+    pub fn is_watch_process_running(&self, distro: &str) -> bool {
+        // Fast path: fresh cached answer.
+        {
+            let guard = self.cache.lock();
+            if let Some(entry) = guard.get(distro) {
+                if entry.at.elapsed() < CACHE_TTL {
+                    return entry.running;
+                }
+            }
+        }
+
+        // Slow path: re-probe. Drop the lock before shelling out so other
+        // distros' probes aren't blocked.
+        let running = probe_distro(distro, DEFAULT_WATCH_PROCESSES);
+
+        let mut guard = self.cache.lock();
+        guard.insert(
+            distro.to_string(),
+            CacheEntry {
+                at: Instant::now(),
+                running,
+            },
+        );
+        running
+    }
+}
+
+impl Default for ProbeCache {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+/// Run `wsl.exe -d <distro> -- pgrep -x <name>` for each watched name.
+/// Returns true on the first hit. On any failure (wsl.exe missing, distro
+/// not running, pgrep not installed, timeout) returns true — fail-safe is
+/// suppression.
+fn probe_distro(distro: &str, watched: &[&str]) -> bool {
+    if !cfg!(windows) {
+        // Non-Windows builds don't actually ship the app; pretend no watched
+        // process so the idle indicator works for developer test runs.
+        return false;
+    }
+    if distro.is_empty() {
+        // We can't probe an empty distro name; treat as "no info" → fail-safe.
+        tracing::debug!("probe: empty distro name; defaulting to suppression");
+        return true;
+    }
+
+    for name in watched {
+        match probe_one(distro, name) {
+            Ok(true) => return true,
+            Ok(false) => continue,
+            Err(e) => {
+                tracing::debug!(
+                    "probe: wsl pgrep for {name:?} in {distro:?} failed: {e} — suppressing idle"
+                );
+                return true;
+            }
+        }
+    }
+    false
+}
+
+/// Single `pgrep -x <name>` invocation. Ok(true) on a match, Ok(false) on
+/// exit code 1 (no match), Err on anything else. Wrapped in our standard
+/// `quiet_command` so the console window doesn't flash on the Windows
+/// desktop every probe.
+fn probe_one(distro: &str, name: &str) -> std::io::Result<bool> {
+    // `pgrep -x` matches the exact comm (no substring), which avoids
+    // `claude-something-else` false-positives. Stdout/stderr are silenced
+    // — exit code carries the answer.
+    //
+    // Note: `name` is a compile-time string literal in DEFAULT_WATCH_PROCESSES
+    // (no user input), so shell-quoting concerns don't apply. If we ever
+    // wire user-supplied process names through here we MUST validate / shell-
+    // quote them before this point.
+    let out = crate::pty::quiet_command_pub("wsl.exe")
+        .args(["-d", distro, "--", "pgrep", "-x", name])
+        .stdout(std::process::Stdio::null())
+        .stderr(std::process::Stdio::null())
+        .output()?;
+
+    match out.status.code() {
+        Some(0) => Ok(true),  // pgrep found at least one match
+        Some(1) => Ok(false), // pgrep ran but found nothing
+        Some(other) => {
+            // 2 = syntax error in pgrep itself; 3 = fatal error; 127 = command
+            // not found. None of these mean "definitively no claude running",
+            // so treat as a probe failure (caller fails-safe to true).
+            Err(std::io::Error::other(format!(
+                "pgrep exit code {other}"
+            )))
+        }
+        None => Err(std::io::Error::other("pgrep killed by signal")),
+    }
+}

src-tauri/src/pty.rs

@@ -457,6 +457,13 @@ fn looks_like_password_prompt(buf: &[u8]) -> bool {
 
 /// Run a process without flashing a console window on Windows.
 fn quiet_command(program: &str) -> std::process::Command {
+    quiet_command_pub(program)
+}
+
+/// Public variant for cross-module callers (currently {@link crate::probe}).
+/// Same behaviour as the in-module `quiet_command`; the wrapper exists so
+/// other modules don't each re-implement the CREATE_NO_WINDOW dance.
+pub fn quiet_command_pub(program: &str) -> std::process::Command {
     let mut c = std::process::Command::new(program);
     #[cfg(windows)]
     {

src/components/McpPanel.css

@@ -187,6 +187,55 @@
   color: #ccd;
 }
 
+/* Inline small-print under inputs — small, muted, tight line-height. Used by
+ * the token hint and the .mcpb install hint. */
+.mcp-hint {
+  margin: 4px 0 0;
+  color: #888;
+  font-size: 11px;
+  line-height: 1.4;
+}
+.mcp-hint code {
+  background: #0c0c0c;
+  padding: 1px 4px;
+  border-radius: 2px;
+  font-family: inherit;
+  color: #aac;
+}
+
+/* ---- Claude Desktop .mcpb install row ----------------------------------- */
+
+.mcp-mcpb-row {
+  display: flex;
+  align-items: flex-start;
+  gap: 12px;
+}
+
+.mcp-mcpb-btn {
+  font: inherit;
+  font-family: inherit;
+  font-size: 11px;
+  font-weight: 600;
+  background: #1a2a3a;
+  color: #cce6ff;
+  border: 1px solid #2a4a6a;
+  border-radius: 3px;
+  padding: 6px 14px;
+  cursor: pointer;
+  flex-shrink: 0;
+  white-space: nowrap;
+}
+.mcp-mcpb-btn:hover {
+  background: #2a4a6a;
+  color: #e0f0ff;
+  border-color: #4488cc;
+}
+
+.mcp-mcpb-hint {
+  flex: 1 1 auto;
+  margin: 0;
+}
+
 .mcp-snippet {
   font: inherit;
   font-family: inherit;

src/components/McpPanel.tsx

@@ -2,12 +2,18 @@ import { useEffect, useState, useCallback } from "react";
 import {
   writeText as clipboardWriteText,
 } from "@tauri-apps/plugin-clipboard-manager";
+import { openUrl } from "@tauri-apps/plugin-opener";
 import type { McpStatus, McpAuditEntry } from "../ipc";
 import AuditTab from "./AuditTab";
 import PolicyTab from "./PolicyTab";
 import ErrorBoundary from "./ErrorBoundary";
 import "./McpPanel.css";
 
+// URL of the GitHub-style releases page where each tagged build attaches the
+// prebuilt `.mcpb` bundle (sibling to the NSIS installer). Source bundle is
+// regeneratable via `pnpm run build:mcpb`.
+const MCPB_RELEASES_URL = "https://git.rdx4.com/megaproxy/tiletopia/releases";
+
 interface McpPanelProps {
   status: McpStatus;
   onStart: () => Promise<void>;
@@ -196,6 +202,31 @@ export default function McpPanel({
                     </p>
                   </div>
 
+                  <div className="mcp-field">
+                    <label>Claude Desktop (one-click install)</label>
+                    <div className="mcp-mcpb-row">
+                      <button
+                        className="mcp-mcpb-btn"
+                        onClick={() => {
+                          void openUrl(MCPB_RELEASES_URL).catch((e) =>
+                            console.warn("open releases page failed:", e),
+                          );
+                        }}
+                      >
+                        Download .mcpb
+                      </button>
+                      <p className="mcp-hint mcp-mcpb-hint">
+                        Grab <code>tiletopia.mcpb</code> from the releases
+                        page, then drag it into Claude Desktop's{" "}
+                        <em>Settings → Extensions</em>. The bundle reads your
+                        bearer token from <code>%APPDATA%</code> at launch —
+                        zero copy-paste, and token regeneration above keeps
+                        working transparently. (Bundle is regeneratable from
+                        source via <code>pnpm run build:mcpb</code>.)
+                      </p>
+                    </div>
+                  </div>
+
                   <div className="mcp-field">
                     <label>Claude Code config snippet (.mcp.json)</label>
                     <pre className="mcp-snippet">

src/ipc.ts

@@ -39,6 +39,14 @@ export interface SshHost {
 
 export const listDistros = (): Promise<string[]> => invoke("list_distros");
 
+/** Ask the backend whether any built-in "watched" process (currently just
+ *  `claude`) is running in the given WSL distro. Cached per-distro for ~3s
+ *  on the Rust side. Fail-safe: probe failures resolve to `true` so the
+ *  caller suppresses the idle indicator. Only meaningful for WSL panes —
+ *  PowerShell + SSH should skip this and fall back to always-notify. */
+export const isWatchProcessRunning = (distro: string): Promise<boolean> =>
+  invoke("is_watch_process_running", { distro });
+
 export const spawnPane = (args: {
   spec: SpawnSpec;
   cols: number;

src/lib/layout/LeafPane.tsx

@@ -10,7 +10,7 @@ import {
 import { type LeafNode, resolveFontSize, type LeafShellSpec } from "./tree";
 import { useOrchestration } from "./orchestration";
 import XtermPane from "../../components/XtermPane";
-import type { SpawnSpec } from "../../ipc";
+import { isWatchProcessRunning, type SpawnSpec } from "../../ipc";
 import "./LeafPane.css";
 
 const IDLE_THRESHOLD_MS = 5000;
@@ -116,8 +116,24 @@ export default function LeafPane({ leaf }: { leaf: LeafNode }) {
   // ---- idle detection ----------------------------------------------------
   // Local boolean for the red border + status text on this pane; reported
   // up to App via orch.reportLeafIdle for the titlebar's "N idle" badge.
+  //
+  // Filter: for WSL panes, before flagging idle we probe the backend to
+  // see if any "watched" process (currently just `claude`) is running in
+  // the distro. If it is, the silence is "claude thinking / user reading",
+  // not "nothing happening" — stay quiet. Probe is per-distro (not per-
+  // pane: the inside-WSL PID isn't observable from Windows), so multiple
+  // panes in the same distro will all suppress if claude is running in
+  // any of them. Agreed trade-off; over-suppression beats the previous
+  // always-notify behaviour.
+  //
+  // PowerShell + SSH skip the probe and fall through to legacy behaviour
+  // (PS has no portable `ps`; SSH processes live on the remote box).
   const lastDataTimeRef = useRef(Date.now());
   const [isIdle, setIsIdle] = useState(false);
+  const isWslPane = leaf.shellKind === "wsl";
+  // Captures the distro name into the interval callback. Empty string when
+  // the leaf doesn't have one yet — the probe treats that as fail-safe true.
+  const wslDistro = isWslPane ? (leaf.distro ?? "") : "";
   const onDataReceived = useCallback(() => {
     lastDataTimeRef.current = Date.now();
     setIsIdle((cur) => {
@@ -126,17 +142,81 @@ export default function LeafPane({ leaf }: { leaf: LeafNode }) {
     });
   }, [orch.reportLeafIdle, leaf.id]);
   useEffect(() => {
-    const id = window.setInterval(() => {
+    // Guard against late-resolving probes after unmount or another tick
+    // already shipping a fresher answer.
+    let cancelled = false;
+    let inFlight = false;
+
+    const tick = () => {
       const dt = Date.now() - lastDataTimeRef.current;
       const nowIdle = dt >= IDLE_THRESHOLD_MS;
+
+      // Transitioning out of idle is unconditional — fresh output beats
+      // any probe answer.
+      if (!nowIdle) {
         setIsIdle((cur) => {
-        if (cur === nowIdle) return cur;
-        orch.reportLeafIdle(leaf.id, nowIdle);
-        return nowIdle;
+          if (!cur) return cur;
+          orch.reportLeafIdle(leaf.id, false);
+          return false;
         });
-    }, 1000);
-    return () => clearInterval(id);
-  }, [leaf.id, orch.reportLeafIdle]);
+        return;
+      }
+
+      // Transitioning into idle. Non-WSL panes: report immediately (legacy
+      // behaviour). WSL panes: gate on the probe; suppress if a watched
+      // process is running in the distro.
+      if (!isWslPane) {
+        setIsIdle((cur) => {
+          if (cur) return cur;
+          orch.reportLeafIdle(leaf.id, true);
+          return true;
+        });
+        return;
+      }
+
+      // WSL path. Don't stack probes — one in flight per pane at a time.
+      if (inFlight) return;
+      inFlight = true;
+      void isWatchProcessRunning(wslDistro)
+        .then((suppress) => {
+          if (cancelled) return;
+          // If output arrived while the probe was in flight, the next tick
+          // (or onDataReceived) will reconcile; don't flip-flop here.
+          if (Date.now() - lastDataTimeRef.current < IDLE_THRESHOLD_MS) return;
+          if (suppress) {
+            // claude (or another watched proc) is running — treat silence
+            // as expected and stay out of the idle set.
+            setIsIdle((cur) => {
+              if (!cur) return cur;
+              orch.reportLeafIdle(leaf.id, false);
+              return false;
+            });
+          } else {
+            setIsIdle((cur) => {
+              if (cur) return cur;
+              orch.reportLeafIdle(leaf.id, true);
+              return true;
+            });
+          }
+        })
+        .catch((e) => {
+          // Probe IPC errored — fail-safe to suppression (matches the Rust
+          // side's own fail-safe).
+          if (cancelled) return;
+          // eslint-disable-next-line no-console
+          console.debug("idle probe failed", e);
+        })
+        .finally(() => {
+          inFlight = false;
+        });
+    };
+
+    const id = window.setInterval(tick, 1000);
+    return () => {
+      cancelled = true;
+      clearInterval(id);
+    };
+  }, [leaf.id, orch.reportLeafIdle, isWslPane, wslDistro]);
   // Clear from the app-level idle set when this pane unmounts.
   useEffect(() => {
     return () => orch.reportLeafIdle(leaf.id, false);

src/lib/shortcuts.ts

@@ -110,6 +110,6 @@ export const TIPS: TipSpec[] = [
   },
   {
     title: "MCP server (let Claude drive the workspace)",
-    body: "Titlebar 🤖 opens the MCP control panel — start the server and paste the snippet into your Claude Code .mcp.json. The snippet uses npx mcp-remote as a stdio shim because Claude Code's HTTP-MCP client ignores static bearer auth and tries OAuth instead; the shim proxies the HTTP endpoint with the bearer baked in. URL + token persist across restarts; Regenerate the token in the panel if it leaks. Default-deny per pane: toggle 🤖 on each pane's toolbar to expose it to MCP. Read-only in v1 (no spawn or write yet).",
+    body: "Titlebar 🤖 opens the MCP control panel. Start the server, then for Claude Desktop click 'Download .mcpb' and drag the file into Settings → Extensions — zero-config because the bundle reads your bearer token from %APPDATA% at launch (no copy-paste, survives token rotation). For Claude Code (terminal CLI) use the fallback snippet in the panel: it wires npx mcp-remote as a stdio shim because Claude Code's HTTP-MCP client ignores static bearer auth and tries OAuth instead. URL + token persist across restarts; Regenerate the token in the panel if it leaks. Default-deny per pane: toggle 🤖 on each pane's toolbar to expose it to MCP.",
   },
 ];