| `UNAUTHORIZED` | 401 | auth required or failed (send `-u user:password`). ⚠️ The 401 body is plain text, NOT this envelope, see [Auth and credentials](#auth-and-credentials) |
| `FORBIDDEN` | 403 | authenticated but not permitted: an admin-only route in multi-user mode, a `workingDir`/case path outside your own workspace, or a shell session without the can-bypass-permissions grant. ⚠️ **Not** what an ownership miss on a session returns: a session you do not own answers 404 `NOT_FOUND`, identically to one that does not exist (deliberate, it leaks no existence) |
| `NOT_FOUND` | 404 | no such session, or one this caller does not own. Also quick-start's answer for an unknown remote or docker host |
| `SESSION_BUSY` | 409 | on a **wait**: this session's waiter cap (16, combined signal+output) is full. On **quick-start**: a session cap is full, so clean up before starting more. Two different caps can raise it: the global 50 (`MAX_CONCURRENT_SESSIONS`), and in multi-user mode the per-user cap, which defaults to half of that, **25** (`maxSessionsPerUser()`, `config/multiuser.ts:59-63`). The message tells you which |
| one session (has `.data.pid`, `null` until the PTY spawns) | `GET /api/v1/sessions/:id`, ⚠️ **neither a liveness nor a busy check**, see below |
| unified list incl. history | `GET /api/v1/sessions/unified` → `.data.sessions[]` (NOT `.data[]`), and it folds in transcript history from the whole machine, never use it to verify cleanup; `GET /api/v1/sessions` is the cleanup check |
| create a session in an arbitrary directory (no case, **no PTY**, id at `.data.session.id`) | `POST /api/v1/sessions`, then `POST /api/v1/sessions/:id/interactive` or `.../shell` to start it, see [Starting a worker](#starting-a-worker) |
| **read a worker's answer** (claude/codex) | `GET /api/v1/sessions/:id/last-response` → `.data.{text,timestamp}`, clean transcript text, no TUI noise. ⚠️ **Poll it**, see [symptom 7](#7-last-response-returns-an-empty-string-right-after-stop) |
| read terminal (tail is in **BYTES**, raw ANSI) | `GET /api/v1/sessions/:id/terminal?tail=3000` → `.data.terminalBuffer`, for *diagnosis* (unsubmitted prompt?), not for reading answers |
| the case's intent profile (Read My Mind: user goals + recent real prompts) | `GET /api/v1/sessions/:id/intent` → `.data.intent.{goals,recentPrompts}` (empty with `updatedAt: 0` until something is recorded) |
| replace the user-goals text on the case's intent profile | `PUT /api/v1/sessions/:id/intent` body `{"goals":"…"}` (≤ 8192 chars, strict schema; REPLACES the text, read + merge first) |
| forget the case's intent profile (only when the user asks) | `DELETE /api/v1/sessions/:id/intent` → `.data.deleted` |
| predict the user's next prompt (Read My Mind; claude-mode only, 5-90 s, costs real tokens) | `POST /api/v1/sessions/:id/readmymind` body `{}` (rethink: `{"steer":"…","rejected":["…"]}`) → `.data.suggestions[].{prompt,why,kind}`, suggestions are PROPOSALS; never send one to a session unless the user asked. 409 = one already running; 400 = non-claude mode |
| delete one session (yours only, via `delete_session`) | `DELETE /api/v1/sessions/:id`, never call it bare; the fail-closed helper in SKILL.md is the only self-protection that exists. Answers `{"success":true,"data":{}}`: an **empty** body is the success signal, there is nothing to read back |
- **Send it alone, with no `\r`.** Esc is a keypress, not a line.
- ⚠️ **`POST /api/sessions/:id/send-key` is NOT this endpoint.** Its allowlist is
exactly `S-Enter` and `C-Enter`, both mapping to hex `0a`
(`session-routes.ts:1490-1499`); anything else is a 400 `INVALID_INPUT: Key not
allowed`. There is no named `Escape` key.
- ⚠️ **One Esc does not always land** (observed, not guaranteed by this API: what Esc
does after it reaches the pane is claude's own behavior, not Codeman's). An
interrupted claude may need a second one, so
**read `terminal?tail=2000` after** rather than assuming, and confirm the composer is
clean before sending the next real prompt.
- The interrupted turn is still billed for the work it already did. Interrupt is
cheaper than respawn, which runs `/clear` and destroys the conversation.
### Is it stuck? structured signals
Two reads that answer "is this worker actually doing something" without parsing a
screen.
| Task | Call |
|------|------|
| what bash commands the worker is running right now | `GET /api/v1/sessions/:id/active-tools` → `.data.tools[]`, each `{id, command, filePaths, timeout?, startedAt, status, sessionId}` (`types/tools.ts:30-45`); `timeout` is optional, present only when claude printed one |
| a timeline of what has happened in this session | `GET /api/v1/sessions/:id/run-summary` → **`.summary`** |
Quirks that will bite you:
- ⚠️ **`run-summary` IS enveloped: read `.data.summary`.** The handler returns a bare
`{summary}` (`session-routes.ts:997-1012`), but a global `preSerialization` hook
(`server.ts:696-711`) wraps every `/api/*` object payload that lacks a `success` key
into `{success:true,data:payload}`, so the wire shape is
`{"success":true,"data":{"summary":{…}}}`. Reading `.summary` off the top level gets
you `undefined`. (The same hook is why the delete route's `return {}` reaches you as
`{"success":true,"data":{}}`.) A missing tracker is created on the fly, so a fresh
session answers with an empty timeline rather than a 404.
- ⚠️ **`active-tools` proves presence, never absence.** It is fed by the BashToolParser,
which reads Claude's rendered `● Bash(…)` lines, and `_processExpensiveParsers`
bare `tail|cat|head|less|grep|watch|multitail <path>` lines with no `● Bash(` wrapper:
a shell worker running `cat build.log` really does populate this. In practice it stays
empty for most shell work. It also never sees non-Bash
tools: a claude worker deep in Read/Edit/Task/WebFetch shows an empty list while
working hard. Capped at 20 entries. A **non-empty** list is solid proof of life; an
empty one means nothing.
-`.summary.events[]` are `{id, timestamp, type, severity, title, details?, metadata?}`
(`types/run-summary.ts:50-65`). ⚠️ The prose fields are **`title`** and **`details`**,
not `message`/`detail`: a gather doing `.[].message` gets `null` for every event and
reads as an empty timeline. `.summary.stats` carries token totals, active/idle
milliseconds and `errorCount`/`warningCount`.
- **The server already computes stuck-ness.** After 10 minutes in one state with no
change it appends one event `type:"state_stuck"`, `severity:"warning"`,
`details:"In state for N+ minutes"` (`run-summary.ts:37`, `:394-405`). ⚠️ Two limits:
it is latched **per state**, not per session (`stateStuckWarned` is reset to `false` on
every state change, `run-summary.ts:152`), so it fires at most once per state but can
fire repeatedly across a session, and its presence is not proof of a *current* stall;
and the "state" it watches is the
**respawn state machine's**, fed only by `RespawnController` transitions
(`respawn-event-wiring.ts:58`), so a plain worker with no respawn attached records no
state and can never warn. Absence is never evidence of health.
### Usage limits
| Task | Call |
|------|------|
| arm auto-resume on a usage-limit pause | `POST /api/v1/sessions/:id/auto-resume` body `{"enabled":true}` → `.data.autoResume.{enabled,resumeAt}` |
When a claude worker hits a subscription usage limit it stops mid-run and every wait on
it times out. The tell is `.data.limitPaused:true`, which rides along on every wait
result: a timeout is then *expected*, so do not retry hard and do not kill the worker.
Arming auto-resume makes Codeman parse the reset time out of the worker's own message
and send Esc + `continue` about two minutes after reset, keeping the conversation.
- Arming it **after** the pause still works: `setAutoResume(true)` re-scans the last
8 KB of the terminal buffer once and arms only if the parsed reset time is still in
the future (`session.ts:1079-1091`). If the limit footer has already scrolled out of
that window, nothing arms and the call reports `resumeAt` absent.
- ⚠️ **Respawn and Ralph are NOT the workaround.** A respawn cycle runs `/clear`, which
wipes the conversation you were waiting on. The server blocks respawn cycles while a
session is limit-paused for exactly that reason; do not route around it.
- Claude-mode only, and it is a mutating call on the session's behavior: only for
sessions you created, or when the user asked.
### The fleet watcher: `GET /api/events`
One SSE stream carries every session's lifecycle and hook events, so you can watch a
whole fleet on one connection instead of polling each worker.
| Param | Notes |
|-------|-------|
| `sessions` | comma list of ids. Filters **only**`session:terminal` batches |
| `clientId` | any 8-64 char token matching `/^[A-Za-z0-9_-]{8,64}$/` (`server.ts:180`), a uuid being merely one; lets you change the filter later via `POST /api/events/subscribe` without reconnecting |
**The trick: `?sessions=<bogus>` gives you a quiet stream.** The filter is applied in
`flushSessionTerminalBatch()` only; `broadcast()` deliberately ignores it so lifecycle
and metadata events reach every client regardless (the comment at
`sse-stream-manager.ts:269-275` says so in as many words). Subscribing to an id that
does not exist therefore suppresses the high-volume terminal firehose while
3.`wait.ended`, the wait was released early, with no signal, match or timeout. On
the two GET routes that means the session was torn down mid-wait or the server is
shutting down: stop looping. On send-and-wait, **read `delivered` first**:
`delivered:false` means the write never landed and the server released its own
waiter, so the session may well still exist and the recovery is to restart the
worker, not to mourn it ([symptom 3](#3-endedtrue-on-a-session-that-still-exists)).
## Limits and caps
Every number the server will enforce on an orchestrating agent. All are
env-overridable by the operator, so treat them as defaults and read back what the
response echoes.
| Cap | Default | Where it bites |
|-----|---------|----------------|
| `input` length | **65536** characters | 400 `INVALID_INPUT` at the route; the Zod schema's 100000 is the wrong number to plan against, and nothing is typed on rejection |
| `clientId` length | 128 characters | same 400 |
| concurrent waiters, one session | 16 (signal + output combined) | 409 `SESSION_BUSY` on a wait. Reuse one wait per worker |
| concurrent waiters, one owner | 48 (multi-user only; no owner = no cap) | 429 `RATE_LIMITED` |
| concurrent waiters, process-wide | 128 | 429 `RATE_LIMITED`; switching sessions does not help, back off |
| wait timeout | clamped to `[1000, 600000]` ms, default 60000 | positive integers only; anything else is a 400, not a clamp |
| `match` string | 1–200 characters, literal only | 400; `regex=` is rejected outright |
| `from=buffer` scan window | 256 KB tail of the terminal buffer | a marker older than that tail is invisible even with `from=buffer` |
| wait-output snippet context | 80 characters either side | `wait.snippet` is bounded, not the whole line |
| every curl fails with a certificate error | you dropped `-k`; `CODEMAN_API_URL` is HTTPS with a self-signed cert |
| `GET .../sessions/$CODEMAN_SESSION_ID` 404s | Docker case: the env id is truncated to 8 chars; find yourself with `startswith($SELF)`, and always self-compare by prefix, in both directions |
| connection refused from inside a container | a loopback-bound server is unreachable from a container, and `CODEMAN_DOCKER_BRIDGE_HOOKS=1` does **not** fix that: it opens a hooks-only listener, so hook events start flowing but `/api/v1/*` stays refused. Driving the API from inside a Docker case needs a reachable bind (an operator decision); report it, don't retry |
| wait routes 404 on a valid session id | read the `.error` text: a `Route ...` prefix means the server predates the wait endpoints (< 1.13.0; a dev build can serve them while reporting an older version, so probe, never version-compare), poll `terminal?tail=` and say so. `Session ... not found` means your id is wrong, not the server |
| wait on `stop` never resolves | non-claude mode, or hooks not reaching the server (Docker/remote), or a case created by Codeman < 1.13.0 against an `--https` install (its hook curls lacked `-k` and TLS-failed silently; a 1.13.0+ server rewrites them the next time a session starts in that case). Use markers or `idle,exit` |
| new claude worker ignores its first prompt | it was showing the first-run trust dialog and Codeman's auto-accept did not fire (it is bounded by a 90 s window and an attempt cap); use the readiness recipe in SKILL.md, wait for `shift+tab` first, accept the dialog only as the bounded fallback |
| readiness burns its whole budget, then the worker answers fine anyway | you matched `bypass`, which is the statusline of ONE permission mode. Codeman spawns `--dangerously-skip-permissions` by default, but the server's `claudeMode` setting also has `auto` (`auto mode on`), `allowedTools` and `normal` (both `don't ask on`), and the effective per-session value is not exposed on `GET /api/v1/sessions/:id`. Match **`shift+tab`** instead: every mode's status bar ends `(shift+tab to cycle)` (measured per mode against claude-cli 2.1.226). Expect `blocked` signals mid-turn on the non-default modes |
| ANSI escapes survive the strip pipeline | `sed -e 's/\x1b…'` on macOS: `\x1b` is GNU-only, BSD sed matches nothing and strips nothing. Use the `ESC=$(printf '\033')` form above |
| ready claude worker missing from `ListAgents` | cross-session messaging is off for that end: CLI < 2.1.224, the feature flag not (yet) on (observed: two 2.1.226 sessions on one box, only one with an inbox socket), a telemetry-disabling env var, a Docker/remote case, or a non-claude mode. Not an error: drive it over the HTTP recipes. See `reference/messaging.md` |
| `SendMessage` says "not an agent in this conversation" | first contact with a peer needs the ref: re-send with the exact `name [ref]` string from the `ListAgents` row, or from that error's own suggestion |
| message sent, worker never acts, no reply, no `stop` | the message was held (permission-class mismatch: a non-default `claudeMode` spawns prompting-class workers, and the approval dialog expires unattended after ~5 min) or refused (`crossSessionInbound`). Run the bounded backstop, then deliver once over HTTP input. See `reference/messaging.md` |