Files
ClaudeMailbox/plugin/commands/mailbox-doctor.md
Mika Kuns 462d6561e1 feat(plugin): per-session mailbox identity + mailbox-update command
The hook now derives a unique mailbox name from the session_id supplied
on hook stdin, so two parallel Claude Code sessions in the same project
get distinct mailboxes (e.g. `claude-a8b3c1d2`, `claude-d4e5f6a7`)
instead of colliding on a shared env value. An optional
CLAUDE_MAILBOX_NAME base prefix flavors the names as `<base>-<sid>`.

Adds:
- `claude-mailbox session-announce` subcommand for the new SessionStart
  hook, which prints the current session's mailbox name to context
- `/claude-mailbox:mailbox-update` slash command for `npm update` +
  daemon restart
- stdin parsing helpers (parseHookStdin, deriveSessionName) with unit
  tests; the doctor no longer needs a mandatory name prompt
2026-05-19 11:39:14 +02:00

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Markdown

---
description: Diagnose and auto-fix the Claude-Mailbox setup (binary install, daemon autostart, smoke test, optional base-prefix).
allowed-tools: Bash, Read, Edit, Write
---
You are running the **Claude-Mailbox doctor**. Walk through these checks in order. After each step, print a one-line `✓` / `✗` with the action you took. End with a summary block.
Use `Bash` only for `claude-mailbox` subcommands, `npm`, `where`/`which`, and HTTP probes. Use `Read`/`Edit`/`Write` for `.claude/settings.json`. Never run `sudo` automatically — if elevation is needed, stop and ask.
## Step 1 — daemon binary on PATH
Run: `claude-mailbox --version`
- **Exit 0** → ✓ record the version. Continue.
- **Command not found** → binary missing. Install path:
| Platform | Command |
|---|---|
| Windows | `npm install -g @kuns/claude-mailbox` (no admin) |
| macOS / Linux | `npm install -g @kuns/claude-mailbox` (may fail with EACCES — never run sudo automatically; ask the user) |
Prerequisite: `npm config get @kuns:registry` must point at `https://git.kuns.dev/api/packages/releases/npm/`. If not:
```
npm config set @kuns:registry=https://git.kuns.dev/api/packages/releases/npm/
```
After install, re-run `claude-mailbox --version`. If it still fails, stop and report.
## Step 2 — daemon autostart and running state
Run: `claude-mailbox status`
- `Running` → ✓ continue.
- `Stopped` → `claude-mailbox start`, re-check.
- `NotInstalled` → `claude-mailbox install-autostart`, then `claude-mailbox start`, re-check.
If status doesn't reach `Running`, stop and report.
## Step 3 — health probe
Hit `http://127.0.0.1:47822/health`. Expect a JSON body with `"status":"ok"`. If unreachable, stop and report — the daemon claims it's running but isn't accepting connections.
## Step 4 — mailbox identity
**No prompt by default.** Each Claude Code session now gets a unique mailbox name auto-derived from its `session_id` (e.g., `claude-a8b3c1d2`), so two parallel sessions can never collide.
Read `.claude/settings.json` in the current working directory and look for `env.CLAUDE_MAILBOX_NAME`.
- If set → ✓ this is a **base prefix**. The real name will be `<base>-<short_session_id>`. Tell the user "Mailbox prefix is set to `X`."
- If unset → ✓ tell the user "Mailbox name will be auto-derived (`claude-<short_session_id>`)."
Then **ask** the user (one question, not a deep prompt):
> "Want to flavor your mailbox names with a memorable prefix like `backend` or `frontend`? (yes / no / change to `<x>`)"
If they say yes or give a value:
1. Read `.claude/settings.json` (empty `{}` if missing).
2. Merge `env.CLAUDE_MAILBOX_NAME` = chosen value, preserving anything else.
3. Write back with 2-space indentation.
4. Mark this as `restart_needed = true`.
If they say no or skip → leave as-is.
## Step 5 — smoke test
Use two ephemeral names (`doctor-probe-a` / `doctor-probe-b`) — we don't need the real session name here, we just need to prove the daemon round-trips:
```
claude-mailbox send --from doctor-probe-a --to doctor-probe-b --body "ping from doctor"
claude-mailbox check --name doctor-probe-b
```
The `check` output must be a JSON array with one message: `from: doctor-probe-a`, body matches. If yes ✓. If no ✗ and report what came back.
## Step 6 — summary
```
Claude-Mailbox doctor
binary: <version>
daemon: Running (and what you did, if anything)
health: ok
base prefix: <name from settings, or "auto-derived (anonymous)">
smoke test: passed | failed
restart hint: yes if restart_needed, otherwise no
```
End with one of:
- All ✓ and no restart needed → "Setup is healthy. Your mailbox name this session will be revealed by the SessionStart hook on next session start (or run `claude-mailbox list` to see active mailboxes)."
- All ✓ and restart needed → "Restart Claude Code (or open a new session) so the SessionStart hook picks up the new base prefix."
- Anything ✗ → "Setup incomplete: <first failure>."