# Versioning & Stability Policy

Codeman follows [Semantic Versioning](https://semver.org/) (`MAJOR.MINOR.PATCH`),
managed via `@changesets/cli` (see the COM workflow in `CLAUDE.md`).

This document defines **what the version number actually promises** — i.e. which
surfaces are covered by SemVer and which are explicitly not. It exists because
"1.0" is a commitment to stability, and an undocumented public surface invites
incompatible client assumptions we would then be pressured to keep.

> **Status:** finalized for the 1.0 cut. The HTTP/SSE API **is** part of the stable
> surface — served under `/api/v1` with a uniform response envelope and
> conventional HTTP status codes. See [`api-reference.md`](api-reference.md).

## What SemVer covers (the public, stable surface)

A **MAJOR** bump is required to break any of these after 1.0:

1. **The CLI.** Command names, documented flags, and their behavior for
   `codeman <command>` (published to npm as `aicodeman`; invoked as `codeman`).
   This is the package's actual public entry point (`bin`).
   - The package is published to npm as `aicodeman` and installs **both** the
     `aicodeman` and `codeman` commands (`bin` aliases); `codeman` is the
     canonical command used throughout the docs. Renaming either after 1.0 is a
     breaking change.
2. **The published `xterm-zerolag-input` library**, but on **its own version
   line** — it is versioned and released independently of the Codeman app. Its
   1.0 status is a separate decision; the Codeman app reaching 1.0 does *not*
   imply `xterm-zerolag-input` is 1.0.
3. **Documented environment variables** that configure deployment:
   `CODEMAN_PASSWORD`, `CODEMAN_USERNAME`, `CODEMAN_HOST`, `CODEMAN_PORT`,
   `CODEMAN_INSTANCE`, `CODEMAN_ALLOWED_HOSTS`, `CODEMAN_DATA_DIR`,
   `CODEMAN_TMUX_SOCKET`, `CODEMAN_ALLOW_UNAUTHENTICATED_NETWORK`,
   `CODEMAN_ALLOW_UNAUTHENTICATED_TUNNEL`, and the `--host` / `--port` /
   `--https` / `--allow-unauthenticated-network` /
   `--allow-unauthenticated-tunnel` CLI flags. Removing or changing the meaning
   of one of these is breaking. The two acknowledgements are listed from 1.46.0,
   the release that split them: the network one covers the non-loopback bind
   only, and an unauthenticated tunnel needs the tunnel one.
4. **The HTTP API and SSE event channel**, served under **`/api/v1`** with the
   uniform `{success:true,data}` / `{success:false,error,errorCode}` envelope and
   conventional HTTP status codes. Endpoint paths, the response envelope, error
   `errorCode` values, and SSE event names are stable — see
   [`api-reference.md`](api-reference.md). *Additive* changes (new endpoints, new
   optional fields, new error codes, new SSE events) are non-breaking; breaking
   changes ship under a new prefix (`/api/v2`). The unversioned `/api/...` alias
   is kept working for the bundled UI.
5. **The dashboard's `#session=<id>` link.** Opening the dashboard URL with a
   `#session=<id>` fragment selects that session if this client can see it. The
   fragment name and that meaning are stable; see
   [Opening a session from your own page](extending-codeman.md#opening-a-session-from-your-own-page).

## What SemVer does NOT cover (internal surfaces — may change in any release)

These may change in a **MINOR** (or even PATCH) release without a MAJOR bump:

1. **The `~/.codeman/` state file formats** (`state.json`, `settings.json`,
   `mux-sessions.json`, etc.). We make a **best-effort** to migrate existing data
   forward (and have done so across renames), but the on-disk schema is not a
   stable contract — do not write tooling that depends on its exact shape.
2. **Internal TypeScript modules.** The npm package is CLI-only; `import`ing it
   programmatically is not supported (there is no stable library entry point).
3. **Experimental / opt-in features**, regardless of the app's version:
   Gesture Control (beta), Agent Teams
   (`CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1`), the native-wrapper window bridge
   (`window.CodemanHost.openWindow` / `closeWindow` / `focusWindow`), and
   anything labeled experimental in the UI or docs. These may change or be
   removed at any time.

### Experimental agent coordination

`codeman agent inspect`, `codeman agent stage` and `codeman agent submit`, and
the matching `GET /api/v1/sessions/:id/inspect`, `POST /api/v1/sessions/:id/stage`
and `POST /api/v1/sessions/:id/submit` routes (with their `/api` aliases, since
every `/api` route is also served under `/api/v1`), are labeled experimental, so
item 3 above applies to them: their commands, flags, endpoint paths, payloads and
behavior may change or be removed in a MINOR or PATCH release. They are also
opt-in: the routes answer `403 FORBIDDEN` with a message naming the synced
`agentCoordinationEnabled` setting (default OFF) until it is turned on, so
automation cannot come to depend on them without choosing to. Pin a compatible
Codeman version when automating them. Existing authentication, ownership and
shared response-envelope rules still apply. The session behavior underneath them
(input revision tracking in the session's write paths, the SubmitVerifier
re-press going through the shared write boundary) runs for every session and is
covered like any other stable behavior. Other agent commands and API routes keep
their existing guarantees. Promotion to stable requires an explicit documented
decision.

### Experimental local model routes

`GET /api/v1/local-model`, `POST /api/v1/local-model/install`, `/cancel`, `/resume`
and `/runtime`, and `DELETE /api/v1/local-model` (and their `/api` aliases) are
labeled experimental, so item 3 above applies to them: their paths, their payloads
(the hardware facts, the verdicts and reasons, the candidate fields, the `install`
object with its states, steps, error codes and actions, the 409 conflict shape and
every English sentence) and their behavior may change or be removed in a MINOR or
PATCH release. They look at the Mac the server runs on, say which local model fits,
and install, start, stop and remove one ([local-models.md](local-models.md)).

They are not behind a setting. Reading changes nothing; an install starts only on an
explicit request that carries the size the person confirmed. All of them are admin
only in multi-user mode. What an install leaves behind is ordinary, stable state: one
saved model endpoint with the id `local-ollama` and the `customModelEndpointsEnabled`
setting switched on, both of which the stable custom model endpoint routes read like
any other endpoint. On-disk state (`local-model.json`, the `local-model/` folder) is
internal, as for every other file in the data directory. Promotion to stable requires
an explicit documented decision.

## Deprecation policy

When we need to change a covered surface:

- Prefer **additive** changes (new flag/env var/command) over breaking ones.
- A covered surface slated for removal is **deprecated first** — it keeps working
  for at least one MINOR release with a runtime warning and a `CHANGELOG.md` note
  pointing to the replacement — then removed in the next MAJOR.
- Back-compat migration shims (e.g. the historical Claudeman→Codeman data/socket
  migration) are kept until a MAJOR boundary, then may be dropped.

## Pre-1.0 (`0.x`) caveat

Until 1.0 ships, **any release may contain breaking changes** per SemVer's `0.x`
allowance. The commitments above take effect at `1.0.0`.

## See also

- `CLAUDE.md` — the COM release workflow (changesets, version bump, deploy)
- `.github/SECURITY.md` — security reporting and the supported-version policy
- `docs/security-architecture.md` — the full trust model