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hapi/docs/api/client-contract/rest.md
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Junmo KimandGitHub fd2822bab5 fix(agy): allow switching existing sessions to newly available models (#1814)
* fix(agy): say what the model picker is actually waiting on

The spinner in the New Session AGY picker read "Checking Antigravity
authentication…", but nothing at that point checks authentication — the
machine is running `agy models`, and the sign-in prompt is a separate
branch below it, shown only when agy reports the failure.

Name the wait after the work: "Fetching available models…", the same
words agy prints while it fetches.

* refactor(agy): describe a probe by its outcome, not by its response

The probe function returned a finished `AgyModelsResponse`, so "agy could
not be reached" and "agy listed no models" both arrived as a successful
response carrying the hardcoded mirror, and the caller could no longer
tell which had happened. Every policy decision about that answer has to
live inside the probe as a result.

Hand back what the probe observed — a live catalog, an auth failure, or
nothing usable — and let the caller turn it into a response. Same
behaviour: the mirror still stands in for both failure modes, and the
60s cache still holds whatever came out.

* fix(agy): serve the model catalog stale-while-revalidate

The `agy models` probe is a whole agy invocation — around 3s on a good
day, 15s when it times out — and the 60s window meant the New Session
picker paid that again a minute after the last look.

Keep the last listing agy actually returned and answer from it: fresh for
ten minutes, then still answered while a probe refreshes behind it, until
the entry is a day old and stops standing in for the machine at all. A
probe that times out or loses auth leaves that entry alone, so a blip no
longer empties a working picker, and the hardcoded mirror is no longer
recorded as if the machine had reported it.

Three things fall out of that and are handled here. A machine whose
sign-in has actually gone bad would otherwise look healthy for a day, so
an auth failure rides along with the catalog it can still serve — and,
because nothing else would re-probe a catalog that is still fresh, a
warning riding on the answer is itself a reason to look again. A failed
probe is not repeated on the very next request either, or a machine where
agy hangs would spawn it once per poll.

An explicit refresh always costs a probe, and never rides one that was
already running when it was asked for.

* fix(agy): let Retry force a fresh model catalog probe

With the catalog held for ten minutes, Retry would otherwise hand back the
answer it was pressed to replace, so the intent travels to the machine:
`?refresh=true` on the machine route, an optional RPC param, and a
one-shot flag on the query so ordinary mount and focus refetches stay
cheap. Every hop is optional, so a hub and a runner on different versions
still talk — the older side ignores it and answers from its cache.

Retry also has to be reachable, and honest, in the state that needs it.
The machine now answers with both a usable catalog and the sign-in failure
behind it, so the picker keeps the list and says why it may be out of
date, with the button right there rather than only once there is nothing
left to show. Pressing it runs agy, which can take tens of seconds, so the
button says so while it does.

The client contract covers both: `agy-models` is the one catalog route
that can carry an `error` on a successful response, and the one that
takes a refresh parameter.

* fix(agy): use the machine catalog in the in-session model picker

New Session already asks the machine what `agy models` lists, but a
session that is already open offered the built-in list in
`shared/src/models.ts`. That list is a hand-maintained mirror, so a model
agy started offering after the last release could be picked for a new
session and not for the one already running.

Point the composer at the same machine catalog. The mirror stays as the
fallback for the moment before the machine answers, and a model the
session is already on is kept selectable — and readable, when it is one
of the known presets — even after the catalog moves on without it.

* fix(agy): announce a model catalog re-check that changed the answer

Serving the last known catalog answers the picker instantly, but a picker
that was already open kept showing that answer until the user closed and
reopened it — the machine had no way to say it had found something newer.

Say it on the stream that already carries machine changes. The machine
daemon — the only process that answers `<machineId>:listAgyModels` —
emits it, and the hub forwards it as `machine-agy-models-updated` with
nothing but the machineId. Namespace resolution, per-machine delivery and
reconnect replay all come from the existing path.

What counts as a change is what the route would answer, not what sits in
the cache. That distinction carries the cases: a sign-in that lapsed or
came back changes no models yet changes what the user is told; a machine
whose agy was signed out has been answering from the hardcoded mirror, and
its first real listing is the largest change there is, for every client
except the one awaiting it.

* fix(agy): re-read the announced machine's model catalog

On `machine-agy-models-updated`, cancel and refetch that one machine's
catalog query — the app's global connection is always subscribed, so an
open picker redraws wherever it is.

Cancelling first is what makes it correct rather than merely likely.
query-core cancels an in-flight fetch only when the query already holds
data, so a picker opening for the first time would otherwise join the
request already on its way and settle on the listing the announcement
replaced. The refetch is answered from the machine's cache, so it starts
no probe and cannot bounce another announcement back.

A reconnect the hub could not replay takes the resync path, which clears
the agy catalogs the same way — that path has no announcement to fall back
on, so it is the one that can least afford to join a stale request.

* fix(agy): keep a model the user picked when the catalog moves under them

The catalog can now change while the New Session form is open, and the
form dropped any selection the machine no longer advertised — including
one the user had just made.

Keep that one, and list it as no longer listed so the form does not imply
agy is still offering it. A model restored from a draft or a saved
preference is still dropped: it may never have been runnable here.

* fix(agy): announce uncached authentication changes
2026-09-11 14:19:37 +08:00

20 KiB
Raw Blame History

REST endpoints

Endpoint tables for native clients, grouped by feature. Request/response shapes reference the Zod schemas in shared/src/schemas.ts and shared/src/apiTypes.ts (package @hapi/protocol) — those schemas, not the prose here, are the field-level source of truth. Route behavior is grounded in hub/src/web/routes/*.ts; web/src/api/client.ts is the reference consumer.

Conventions

  • All paths below are relative to the hub base URL. Everything under /api requires Authorization: Bearer <JWT> (Auth).
  • Path params (:id, :messageId, …) must be URL-encoded (the web client uses encodeURIComponent throughout).
  • Request bodies are JSON (content-type: application/json) with one exception: POST /api/voice/transcription is multipart/form-data. Responses are JSON unless noted (generated images and scratchlist attachments return raw bytes).
  • Bodies are validated with Zod; failures return 400 (see Errors).
  • gzip: the hub gzips /api/* JSON responses when Accept-Encoding accepts gzip. Negotiation is q-value aware (acceptsGzip in hub/src/web/sseCompression.ts): gzip;q=0 is honored as a refusal, * counts unless a gzip entry overrides it. Send a normal Accept-Encoding: gzip and decompress transparently. The SSE stream is gzip-compressed separately with per-event flush — see SSE. Source: hub/src/web/server.ts.
  • Several endpoints are RPC-wrapped: the hub forwards to the session's CLI process over Socket.IO and relays the result. These can fail with HTTP 200 + {success: false, error} or with 503 — see Errors.

Tier 1 — required for v1 clients

Health

Source: hub/src/web/server.ts.

Method & path Request Response
GET /health (no auth) — {status: 'ok', protocolVersion: number, capabilities: {workGraph?, titleSuggestion?}} — additive capabilities, ignore unknown keys

Sessions — list & detail

Source: hub/src/web/routes/sessions.ts; shapes SessionSchema (shared/src/schemas.ts), SessionSummary (shared/src/sessionSummary.ts).

Method & path Request Response
GET /api/sessions Query: limit? (1–500), order?=updatedAt {sessions: (SessionSummary & {futureScheduledMessageCount, nextScheduledAt})[]}
GET /api/sessions/:id — {session: Session} (full record incl. metadata, agentState, todos, versions)

Default list order: globalPinned → pinned → active → pending-request count → updatedAt desc; order=updatedAt gives pure recency. List badges come from SessionSummary.pendingRequestsCount (authoritative total) and pendingRequests (capped at 5, oldest-first) — do not derive counts from pendingRequests.length.

Sessions — lifecycle

Source: hub/src/web/routes/sessions.ts; request schemas in shared/src/apiTypes.ts.

Method & path Request Response
POST /api/sessions/:id/resume {permissionMode?} (ResumeSessionRequestSchema) {type: 'success', sessionId}
POST /api/sessions/:id/reopen {} {ok: true, sessionId, resumed: boolean, cursorSessionProtocol?} (ReopenSessionResponseSchema); 422 {error, missing[]} if metadata is incomplete
POST /api/sessions/:id/abort {} {ok: true} (active sessions only)
POST /api/sessions/:id/archive {} {ok: true} or {ok: true, alreadyArchived: true}; 409 for a plain inactive session
DELETE /api/sessions/:id — {ok: true}; 409 while active (archive first)
PATCH /api/sessions/:id {name} (1–255 chars) {ok: true} (rename)
PATCH /api/sessions/:id/summary {text} (1–255 chars) {ok: true}
PUT /api/sessions/:id/pin {mode: 'none'|'project'|'global'} {ok: true}
POST /api/sessions/:id/switch {} {ok: true} — hands terminal-controlled session over to remote control
POST /api/sessions/:id/title-suggestion — {title}; errors pass through 422/429/502/503
GET /api/sessions/:id/slash-commands — SlashCommandsResponse {success, commands?, error?}
GET /api/sessions/:id/skills — SkillsResponse-shaped {success, ...}

::: warning resume / reopen may return a different sessionId Both endpoints return the id of the session that now carries the conversation — which may differ from the id you called them on (fresh spawn under a new id; the old row is superseded). Clients must migrate composer drafts and replace navigation to the returned id. Reference: web/src/routes/sessions/followSupersedingSession.ts; the durable link also appears as metadata.supersededBySessionId on the old session. :::

Optional for v1 (endpoints exist; the v1 native scope does not require them): POST /api/sessions/:id/fork {messageLocalId?} → {sessionId}, POST /api/sessions/:id/rewind {messageLocalId} → {success: true}, GET /api/sessions/:id/export (413 when too large).

Messages

Source: hub/src/web/routes/messages.ts; schemas MessagesQuerySchema, SendMessageRequestSchema, QueuedStateRequestSchema (shared/src/apiTypes.ts), responses CancelMessageResponseSchema, SteerQueuedMessageResponseSchema (shared/src/schemas.ts). Unknown steer delivery is durable and user-resolvable; native clients must implement the same transitions.

Method & path Request Response
GET /api/sessions/:id/messages Query: limit? (1–200, default 50), cursor pairs beforeSeq+beforeAt | afterSeq+afterAt (+ optional untilSeq+untilAt, epoch with after) MessagesResponse {messages: DecryptedMessage[], page: {direction, limit, epoch, reset, nextBefore*/nextAfter*, snapshotHead*, hasMore}} — full cursor semantics in Pagination
POST /api/sessions/:id/messages {text, localId?, attachments?, scheduledAt?, deliveryMode?: 'queue'|'steer'} — text or attachments required; scheduledAt requires localId, must be ≤ 7 days out, excludes attachments and steer {ok: true} — the message itself arrives via SSE (message-received), reconciled by localId
DELETE /api/sessions/:id/messages/:messageId — {status: 'cancelled', localId} | {status: 'invoked', message} | {status: 'busy', localId} (cancel; busy = steer still resolving)
POST /api/sessions/:id/messages/:messageId/steer — {status: 'steered', localId} | {status: 'invoked', message} | {status: 'failed', error, localId}
POST /api/sessions/:id/messages/:messageId/retry — {status: 'retried', localId} | {status: 'already-queued', localId} | {status: 'retry-unavailable', localId} | {status: 'invoked', message} | {status: 'not-found'} — explicit retry only; never automatic replay
POST /api/sessions/:id/messages/queued-state {localIds: string[]} (≤ 1000, deduped) {queuedLocalIds: string[], invokedLocalMessages: [{localId, invokedAt}]} — resync optimistic sends after reconnect

The hub stamps sentFrom: 'webapp' on REST-sent messages server-side; the request body has no such field.

Permissions

Source: hub/src/web/routes/permissions.ts. Pending requests are not messages: they live in session.agentState.requests (keyed by request id) and move to agentState.completedRequests when resolved — schemas AgentStateRequestSchema / AgentStateCompletedRequestSchema in shared/src/schemas.ts.

Method & path Request Response
POST /api/sessions/:id/permissions/:requestId/approve {mode?, allowTools?: string[], decision?, answers?} {ok: true}
POST /api/sessions/:id/permissions/:requestId/deny {decision?} {ok: true}
  • decision: 'approved' | 'approved_for_session' | 'denied' | 'abort'.
  • mode: optionally switch permission mode while approving; validated against the session flavor.
  • answers has two formats, matching the requesting tool: flat Record<string, string[]> (AskUserQuestion) or nested Record<string, {answers: string[]}> (request_user_input). Both routes 404 with Request not found if the id is not currently pending, and 409 session_inactive when the session is inactive.

Session config — mode / model / effort (per flavor)

Source: hub/src/web/routes/sessions.ts; flavor gates in shared/src/modes.ts (getPermissionModesForFlavor) and shared/src/flavors.ts (supportsModelChange, supportsEffort). Wrong-flavor calls return 400; several are additionally rejected with 409 when the session is terminal-controlled (agentState.controlledByUser === true).

Method & path Request Applies to
POST /api/sessions/:id/permission-mode {mode: PermissionMode} All flavors except pi (per-flavor allowed sets in modes.ts)
POST /api/sessions/:id/model {model: string | {provider, modelId} | null} All flavors (supportsModelChange is true for every current flavor); remote-only for codex/cursor/grok
POST /api/sessions/:id/effort {effort: string | null} claude, grok, pi (supportsEffort)
POST /api/sessions/:id/model-reasoning-effort {modelReasoningEffort: string | null} codex, opencode (remote-only)
POST /api/sessions/:id/service-tier {serviceTier: 'fast' | 'standard'} codex (remote-only)
POST /api/sessions/:id/collaboration-mode {mode: 'default' | 'plan'} codex (remote-only)
POST /api/sessions/:id/copilot-agent-mode {mode} copilot (remote-only)

All respond {ok: true}; apply-failures return 409 with a message. Model/effort catalogs (RPC-wrapped; all return {success, ...} \| {success: false, error}):

Method & path Notes
GET /api/sessions/:id/codex-models, /opencode-models, /cursor-models, /grok-models, /copilot-models, /pi-models Active session of the matching flavor; 400 otherwise
GET /api/sessions/:id/opencode-reasoning-effort-options, /grok-reasoning-effort-options Same pattern
GET /api/machines/:id/agy-models, /pi-models, /codex-models, /cursor-models Machine-level (pre-spawn pickers). agy-models takes ?refresh=true to skip the machine's cached catalog, and may answer success: true with an advisory error (see Errors)
GET /api/machines/:id/opencode-models?cwd=, /grok-models?cwd=, /copilot-models?cwd= cwd query required (400 without)

Machines & spawning

Source: hub/src/web/routes/machines.ts; schemas SpawnSessionRequestSchema, MachineListDirectoryRequestSchema, MachinePathsExistsRequestSchema, RenameMachineRequestSchema (shared/src/apiTypes.ts), MachineSchema (shared/src/schemas.ts).

Method & path Request Response
GET /api/machines — {machines: Machine[]} (online machines in the caller's namespace)
PATCH /api/machines/:id {displayName} (trimmed; ≤ 64 chars; empty clears back to hostname) {ok: true}
GET /api/machines/:id/agent-availability — {agents: {agent, available, reason?: 'not_found'|'invalid_configuration'}[]}; 409 runner_upgrade_required on old runners
POST /api/machines/:id/spawn {directory, agent?, model?, effort?, modelReasoningEffort?, yolo?, permissionMode?, sessionType?: 'simple'|'worktree', worktreeName?, serviceTier?, collaborationMode?, copilotAgentMode?, startingMode?: 'remote'|'pty'} {type: 'success', sessionId} | {type: 'error', message, code?, agent?} (agy accepts only remote)
POST /api/machines/:id/list-directory {path, includeHidden?} {success, entries?: (DirectoryEntry & {isGitRepo?})[], error?}
POST /api/machines/:id/paths/exists {paths: string[]} (≤ 1000) {exists: Record<string, boolean>, outsideWorkspaceRoots?: string[]}
POST /api/machines/:id/restart-runner {} {message}; errors carry code: 'machine_not_found' | 'machine_offline'

Note the spawn response is discriminated on type, not HTTP status — a failed spawn is still HTTP 200. Stable spawn failure codes are agent_unavailable, runner_upgrade_required, and outside_workspace_roots. Clients should fetch Agent availability when the machine is selected and use that result to drive the form. The runner performs the authoritative availability check as part of spawning, covering changes after the form-level query without requiring a duplicate client RPC. Availability checks executables and static runner configuration only; it does not execute the Agent or verify account/login state.

Git & files (RPC-wrapped)

Source: hub/src/web/routes/git.ts. Git endpoints return the raw command output — GitCommandResponse {success, stdout?, stderr?, exitCode?, error?} — and the client parses stdout itself (reference parsers: web/src/lib/gitParsers.ts).

Method & path Request Response
GET /api/sessions/:id/git-status — GitCommandResponse (raw git status stdout)
GET /api/sessions/:id/git-diff-numstat Query: staged=true|false GitCommandResponse (raw git diff --numstat stdout)
GET /api/sessions/:id/git-diff-file Query: path (required), staged? GitCommandResponse (raw unified diff)
GET /api/sessions/:id/file Query: path (required) {success, content?, size?, modified?, error?} — content is base64 (decode before display; web ref: web/src/routes/sessions/file.tsx)
GET /api/sessions/:id/files Query: query?, limit? (1–500, default 200) {success, files: [{fileName, filePath, fullPath, fileType: 'file', size?, modified?}]} (ripgrep-backed search)
GET /api/sessions/:id/directory Query: path? (empty = session root) {success, entries?: [{name, type: 'file'|'directory'|'other', size?, modified?}], error?}

When the session has no metadata.path yet, these return HTTP 200 {success: false, error: 'Session path not available'}.

Generated images

Source: hub/src/web/routes/git.ts (same file).

Method & path Response
GET /api/sessions/:id/generated-images/:imageId Raw bytes with Content-Type, Content-Disposition, ETag: "<imageId>", Cache-Control: private, max-age=31536000, immutable; 404 JSON when missing

The image id is an immutable content fingerprint, so it doubles as the ETag: send If-None-Match and the hub answers 304 without the CLI round-trip. Cache aggressively (iOS: URLCache honors this automatically; Android: OkHttp cache).

Uploads (message attachments)

Source: hub/src/web/routes/sessions.ts (UploadFileRequestSchema).

Method & path Request Response
POST /api/sessions/:id/upload JSON {filename, content, mimeType} — content is base64; decoded size limit 50 MB → 413 {success, path?, error?} — pass the resulting metadata in attachments of send-message
POST /api/sessions/:id/upload/delete {path} {success, error?}

Uploads are JSON+base64, not multipart. Both require an active session.

Scratchlist

Source: hub/src/web/routes/sessions.ts (scratchlist section); schemas ScratchlistEntryCreateRequestSchema, ScratchlistEntryUpdateRequestSchema, caps SCRATCHLIST_MAX_ENTRIES = 200, SCRATCHLIST_MAX_TEXT_LENGTH = 10000 (shared/src/apiTypes.ts).

Method & path Request Response
GET /api/sessions/:id/scratchlist — {entries: ScratchlistEntry[]} ({entryId, text, createdAt, updatedAt, attachments[]})
POST /api/sessions/:id/scratchlist {text, entryId?, createdAt?, attachments?} (text ≤ 10 000; text or attachments required) 201 {entry}; 200 {entry} when entryId already exists (idempotent retry); 409 code: 'scratchlist_at_cap' at 200 entries
PUT /api/sessions/:id/scratchlist/:entryId {text?, attachments?} (at least one) {entry}
DELETE /api/sessions/:id/scratchlist/:entryId — {ok: true}
GET /api/sessions/:id/scratchlist/limits — {limits} (attachment size/count/byte budgets)
POST /api/sessions/:id/scratchlist/upload JSON {filename, content (base64), mimeType} {success, attachment}; 413 code: 'scratchlist_attachment_too_large'
GET /api/sessions/:id/scratchlist/attachments/:attachmentId — Raw bytes (Content-Type from stored metadata)
DELETE /api/sessions/:id/scratchlist/attachments/:attachmentId — {ok: true}; 409 code: 'scratchlist_attachment_in_use' while referenced by an entry

Mutations bump scratchlistUpdatedAt in the session's SSE patch — use it as a refetch trigger, not as data.

Voice dictation (the one multipart endpoint)

Source: hub/src/web/routes/voice.ts.

Method & path Request Response
GET /api/voice/transcription/providers — {providers: [{id, label, modes}]} — only providers whose keys are configured on the hub
POST /api/voice/transcription multipart/form-data: file (audio, ≤ 25 MB, audio/* or webm/mp4), provider (openai|elevenlabs|deepgram|groq|openai-compatible), mode = standard, language? (BCP-47-ish, ≤ 35 chars) {text, language?}; 413 body too large, 400 bad field

The realtime-token, voice-assistant token, and WebSocket-proxy endpoints under /api/voice/* belong to the live voice assistant — out of scope for v1.

Usage & storage (owner-only)

Source: hub/src/web/routes/usage.ts, hub/src/web/routes/storage.ts. Both 403 unless namespace is default (Auth → Namespaces).

Method & path Request Response
GET /api/usage/summary Query: range=7d|30d|all (default 7d), timeZone (IANA, validated) UsageSummaryResponse {range, totals, daily[], byAgent[], byModel[], updatedAt}
GET /api/storage/sqlite — {path, databaseBytes, walBytes, shmBytes, totalBytes}

Devices (FCM push)

Source: hub/src/web/routes/devices.ts; full push contract in native-companion-contract.md.

Method & path Request Response
POST /api/devices/register {token, platform: 'phone'|'wear', deviceId} (deviceId: any stable 1–128-char install id) {ok: true} (upsert)
DELETE /api/devices/register {token} {ok: true}

Visibility

Source: hub/src/web/routes/events.ts (POST /visibility).

Method & path Request Response
POST /api/visibility {subscriptionId, visibility: 'visible'|'hidden'} {ok: true}; 404 when the SSE subscription is gone

subscriptionId comes from the SSE connection-changed event (SSE). Report foreground/background transitions so the hub can suppress redundant push notifications while the app is visibly connected.

Hub settings (read)

Source: hub/src/web/routes/hubSettings.ts.

Method & path Response
GET /api/hub-settings {sessionSummaryContract: boolean, sessionSummaryInChat: boolean} — readable by any namespace

SSE

GET /api/events is the realtime channel — subscription params, resume handshake, and reconnect policy are specified in SSE. Its gzip behavior differs from the JSON endpoints (streaming compression with per-event flush), also covered there.

Tier 2 — out of scope for v1

These exist on the hub but v1 native clients must not implement or call them:

Area Paths Why out of scope
Codex Desktop import /api/codex/* (hub/src/web/routes/codexDesktop.ts) Desktop-import tooling
Pi session import /api/pi/*, /api/sessions/:id/pi-* (hub/src/web/routes/piSessions.ts, sessions.ts) Import tooling (the pi-models catalog above is the one exception)
Work graph /api/work-graph/* (hub/src/web/routes/workGraph.ts) Web-only feature
Web Push /api/push/* (hub/src/web/routes/push.ts) Browser Push API; natives use /api/devices (FCM)
Hub settings write PUT /api/hub-settings Owner-only hub administration
Telegram POST /api/bind Telegram Mini App binding only
Voice assistant /api/voice/token, /voices, /backend, /gemini-token, /qwen-token, /qwen-ws, /gemini-ws, /transcription/realtime-token, /telemetry, credentials endpoints Realtime assistant, not v1 dictation
Cursor maintenance /api/sessions/:id/migrate-to-acp, /cursor-chat-store Desktop store migration
Session export GET /api/sessions/:id/export Feeds the share/export feature, excluded from v1
CLI plane /cli/* (hub/src/web/routes/cli.ts) Forbidden for clients — internal CLI↔hub surface; authenticates with the raw access token instead of a JWT and bypasses the client middleware. Never call it from a client, and never send the access token as a bearer anywhere except POST /api/auth's JSON body