> ## Documentation Index > Fetch the complete documentation index at: https://dev.chief.bot/llms.txt > Use this file to discover all available pages before exploring further. # Update Session > Patches the session's name and/or description. Each field is optional; omitting one leaves it unchanged. ## OpenAPI ````yaml /openapi.yaml post /v1/sessions/{id} openapi: 3.0.3 info: title: Chief Public API version: 1.0.0 contact: name: Chief Support url: https://chief.bot description: | Chief's public REST API for programmatic access to chats and assets. All endpoints are authenticated with a Personal Access Token (PAT) sent in the `X-API-Key` header. PATs are minted out-of-band from the Chief settings UI. All endpoints that touch project-scoped resources require the `X-Project-Id` header. Missing or invalid project IDs respond with HTTP 400 and the error code `publicapi.tenancy.project.missing`. ## Error envelope Every error response uses the same JSON envelope: ```json { "code": "publicapi.auth.invalid", "humane": "The provided API key is invalid or has been revoked.", "statusCode": 401 } ``` `code` is a stable, dotted, lowercase identifier suitable for client-side i18n and analytics. `humane` is plain English safe to surface to end users. `statusCode` mirrors the HTTP status. ## Chat workflow — kickoff + poll Chats are asynchronous in v1. Callers need to poll the per-message endpoint until the content they need is present. 1. `POST /v1/chats` with `{prompt}`. The server kicks off the workflow and returns `{chat_id, message_id, created_at}` immediately. `message_id` is the message you'll poll. 2. `POST /v1/chats/{chat_id}/messages` with `{prompt}` to continue an existing chat — appends a new turn and returns `{message_id, created_at}`. 3. `GET /v1/chats/{chat_id}/messages/{message_id}` to read the message. While the workflow is still writing, `prompt` and `response` are omitted; once written they're present. Treat the appearance of `response` as the signal that the assistant has produced output. 4. `GET /v1/chats/{chat_id}` returns chat-level metadata only (`modified_at`). It does not carry messages. 5. `GET /v1/chats/{chat_id}/messages` lists every message's id + `created_at` (no content); clients fetch one message at a time via `GET /v1/chats/{chat_id}/messages/{mid}` for the prompt + response body. ## Asset workflow — three-step upload Assets are uploaded directly to blob storage via a signed URL. The flow is: 1. `POST /v1/assets` with `{filename, mime_type}`, optionally including the hex-encoded `md5` of the file. When `md5` matches content already in the project the server returns `200` with `already_exists: true` and no upload URL — skip to fetching the asset. Otherwise it returns `201` with `{asset_id, upload_url, upload_method:"PUT", upload_headers, expires_at}`. 2. `PUT` the file bytes to `upload_url`, applying every header in `upload_headers` verbatim. The URL is valid until `expires_at`. 3. `POST /v1/assets/{asset_id}/complete` with an empty body to hand the asset off to the ingest pipeline. The server reads the uploaded object's size and MD5 from blob storage at this step. The response carries the current `AssetResponse`; clients poll until `status` is `ready` or `failed`. servers: - url: '{baseUrl}' description: Chief variables: baseUrl: default: https://api.storytell.ai description: Base URL of the deployment serving the API. security: - apiKey: [] tags: - name: Chats description: Public chat lifecycle — kickoff, list, fetch. - name: Assets description: Public asset upload + ingest lifecycle. - name: Labels description: Public label CRUD and asset-label attachment. - name: Actions description: Public action CRUD plus enable/disable. - name: Sessions description: Public recording-session listing and CRUD. - name: Skills description: Public skill CRUD plus enable/disable. - name: Memories description: Public memory CRUD. - name: Projects description: Public project create/edit, membership, and invitations. paths: /v1/sessions/{id}: post: tags: - Sessions summary: Update Session description: | Patches the session's name and/or description. Each field is optional; omitting one leaves it unchanged. operationId: updateSession parameters: - $ref: '#/components/parameters/XProjectId' - in: path name: id required: true schema: type: string pattern: ^session_[a-z0-9]{20}$ example: session_d8aad64dib2c7m3ae7l0 description: Session identifier. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/UpdateSessionRequest' example: name: Standup 2026-05-23 description: Daily standup recording. responses: '200': description: Session updated. content: application/json: schema: $ref: '#/components/schemas/SessionResponse' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '500': $ref: '#/components/responses/InternalServerError' security: - apiKey: [] components: parameters: XProjectId: in: header name: X-Project-Id required: true schema: type: string pattern: ^project_[a-z0-9]{20}$ example: project_d8a4td4dib27i4beefb0 description: | Project identifier scoping the request. Required on every project-scoped public endpoint. Missing or malformed values respond with HTTP 400 and code `publicapi.tenancy.project.missing`. schemas: UpdateSessionRequest: type: object description: | Patch a session's name and/or description. Each field is optional; omitting one leaves it unchanged. properties: name: type: string description: type: string SessionResponse: type: object required: - session_id - name - turns - created_at - modified_at description: | Full session view including the transcript. Blob location and tenancy are not exposed. properties: session_id: type: string pattern: ^session_[a-z0-9]{20}$ name: type: string description: type: string brief: type: string description: User-supplied framing for the session. turns: type: array items: $ref: '#/components/schemas/SessionTurn' created_at: type: string format: date-time modified_at: type: string format: date-time SessionTurn: type: object required: - speaker - source - text - start - end description: | One transcribed segment: who spoke, the audio source, the recognized text, and the start/end offsets in seconds. properties: speaker: type: integer source: type: string text: type: string start: type: number end: type: number Error: type: object required: - code - statusCode properties: code: type: string pattern: ^[a-z][a-z0-9_]*(\.[a-z0-9_]+)+$ description: | Stable dotted, lowercase identifier, namespaced by domain and operation (`..`). Suitable for client-side i18n keys and analytics. Codes are additive; existing codes are never reworded. example: publicapi.auth.invalid humane: type: string description: Plain-English message safe to display to end users. example: The provided API key is invalid or has been revoked. statusCode: type: integer minimum: 400 maximum: 599 description: | Mirror of the HTTP status code. (Field name is camelCase here only — owned by `nutils.Error` across the platform.) example: 401 responses: BadRequest: description: Malformed request, validation failure, or missing tenancy header. content: application/json: schema: $ref: '#/components/schemas/Error' examples: missingProject: summary: Missing X-Project-Id value: code: publicapi.tenancy.project.missing humane: X-Project-Id header is required. statusCode: 400 Unauthorized: description: Missing, malformed, or revoked credentials. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: publicapi.auth.invalid humane: The provided API key is invalid or has been revoked. statusCode: 401 NotFound: description: Resource does not exist or is outside the caller's reach. content: application/json: schema: $ref: '#/components/schemas/Error' InternalServerError: description: Unexpected server error. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: apiKey: type: apiKey in: header name: X-API-Key description: | Personal Access Token, sent verbatim as `pat_<32 chars>`. PATs are minted from the Chief settings UI. ````