> ## Documentation Index > Fetch the complete documentation index at: https://docs.artbucket.io/llms.txt > Use this file to discover all available pages before exploring further. # Preview a proposed change > A pull request's files as the brand's site, at a link that needs no account, and what they would change of the brand as it stands. Checked as an import is. One preview per `ref`: saving again keeps its link. It opens for 30 days after its last save. Scope: `write`. ## OpenAPI ````yaml /openapi.json post /api/v1/brands/{slug}/previews openapi: 3.1.0 info: title: artbucket version: '1' description: >- Agent-first asset management. The web UI is built on this API and nothing else, beside signing in at /api/auth. Send `Authorization: Bearer `: a key works in one workspace with one scope, and scopes are a ladder: read < propose < write < admin. People signed in to the app carry a session cookie instead, and their scope is what their grants add up to: on the organization, the workspace, or single collections and assets. A scope shown as needed on the workspace is also enough on the one collection or asset a route acts on. Agents (MCP at POST /api/v1/mcp) usually get `propose`: what they add waits for a human. servers: - url: http://localhost:3000 security: - bearer: [] - session: [] - {} paths: /api/v1/brands/{slug}/previews: parameters: - name: slug in: path required: true description: Brand slug schema: type: string post: summary: Preview a proposed change description: >- A pull request's files as the brand's site, at a link that needs no account, and what they would change of the brand as it stands. Checked as an import is. One preview per `ref`: saving again keeps its link. It opens for 30 days after its last save. Scope: `write`. requestBody: required: true content: application/json: schema: type: object properties: ref: type: string minLength: 1 maxLength: 200 description: >- What proposes it, as its host names it: pull/12. One preview each; saving again updates it title: type: string maxLength: 300 commit: type: string minLength: 1 maxLength: 100 files: type: object propertyNames: type: string minLength: 1 maxLength: 300 additionalProperties: type: string maxLength: 2000000 description: >- The brand's files by path in its folder: brand.yaml, rules/*.yaml, pages/*.yaml. Others are left alone assets: description: >- The files under assets/ the brand's files point at: path to asset id, or to the SHA-256 of its bytes (upload first) type: object propertyNames: type: string minLength: 1 maxLength: 300 additionalProperties: type: string maxLength: 64 required: - ref - files additionalProperties: false responses: '200': description: The preview content: application/json: schema: type: object properties: data: type: object properties: brand: type: string ref: type: string url: type: string format: uri description: The site as the files say it; no account needed pages: type: array items: type: object properties: slug: type: string title: type: string url: type: string format: uri required: - slug - title - url additionalProperties: false expiresAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$ diff: type: object properties: name: anyOf: - type: object properties: before: type: string after: type: string required: - before - after additionalProperties: false - type: 'null' rules: type: array items: type: object properties: change: type: string enum: - added - removed - changed key: type: string context: type: - string - 'null' type: type: string enum: - color - text - number - list - font before: {} after: {} fields: description: >- What changed: value, usage, label, spec, assets, type type: array items: type: string required: - change - key - context - type additionalProperties: false pages: type: array items: type: object properties: change: type: string enum: - added - removed - changed - moved slug: type: string title: type: string required: - change - slug - title additionalProperties: false theme: type: array items: type: string description: Theme settings changed reordered: type: boolean description: The rules' order changed required: - name - rules - pages - theme - reordered additionalProperties: false description: What it would change of the brand as it stands warnings: type: array items: type: object properties: file: type: string line: type: integer minimum: -9007199254740991 maximum: 9007199254740991 message: type: string required: - file - message additionalProperties: false required: - brand - ref - url - pages - expiresAt - diff - warnings additionalProperties: false required: - data additionalProperties: false default: description: An error content: application/json: schema: type: object properties: error: type: object properties: code: type: string message: type: string detail: {} required: - code - message additionalProperties: false required: - error additionalProperties: false components: securitySchemes: bearer: type: http scheme: bearer description: 'An API key: ab_...' session: type: apiKey in: cookie name: better-auth.session_token description: Signed in, at /api/auth ````