openapi: 3.2.0
info:
  title: Bhanzu CMS Public Content API
  description: Read-only access to Bhanzu's published math learning content. All endpoints are unauthenticated and CORS-enabled.
  version: 1.0.0
  contact:
    email: tech@bhanzu.com
servers:
- url: https://bhanzu.com
  description: Production
tags:
- name: Content
  description: Published article content
paths:
  /api/public/posts:
    get:
      summary: List published articles
      description: Returns metadata for all published articles ordered by creation date (newest first). Does not include body HTML — use /api/public/posts/{slug} for full content.
      operationId: listPosts
      tags:
      - Content
      responses:
        '200':
          description: Array of article summaries
          headers:
            Access-Control-Allow-Origin:
              schema:
                type: string
                example: '*'
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/ArticleSummary'
        '500':
          $ref: '#/components/responses/InternalError'
  /api/public/posts/{slug}:
    get:
      summary: Get article by slug
      description: Returns the full article including body HTML. The slug can be either the short slug (e.g. "what-is-algebra") or the full path (e.g. "/math/what-is-algebra").
      operationId: getPost
      tags:
      - Content
      parameters:
      - name: slug
        in: path
        required: true
        description: Article slug_path or full_path (URL-encoded)
        schema:
          type: string
          example: what-is-algebra
      responses:
        '200':
          description: Full article including body HTML
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ArticleFull'
        '404':
          description: Article not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          $ref: '#/components/responses/InternalError'
  /api/public/sections:
    get:
      summary: List content sections
      description: Returns all available content sections (e.g. math, algebra, science).
      operationId: listSections
      tags:
      - Content
      responses:
        '200':
          description: Array of section names
          content:
            application/json:
              schema:
                type: array
                items:
                  type: string
                  example: math
components:
  schemas:
    ArticleSummary:
      type: object
      properties:
        id:
          type: integer
          example: 42
        slug:
          type: string
          example: what-is-algebra
        full_path:
          type: string
          example: /math/what-is-algebra
        section:
          type: string
          example: math
        title:
          type: string
          example: What is Algebra?
        meta_description:
          type: string
        excerpt:
          type: string
        page_type:
          type: string
          example: blog-post
        author:
          type: string
          example: Bhanzu Team
        reviewed_by:
          type: string
        tags:
          type: string
          example: algebra,math,equations
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
    ArticleFull:
      allOf:
      - $ref: '#/components/schemas/ArticleSummary'
      - type: object
        properties:
          body:
            type: string
            description: Full article content as HTML
    Error:
      type: object
      properties:
        error:
          type: string
  responses:
    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'