> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dualmindlab.tech/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> DualMind Arena API base URL: https://api.dualmindlab.tech. Public endpoints only; admin routes are not part of this API.
> Authenticate with the access token from an Arena session (a Supabase JWT) as `Authorization: Bearer <token>`. There are no API keys yet; never invent one.
> For battles call POST /api/arena/dualchat, then vote with POST /api/arena/model-vote using the returned comparisonId. Keep model names hidden from voters until they vote.
> GET /api/arena/model-stats (leaderboard) and GET /health need no token.

# Share a thread

> Change who can see a thread. Share links use `https://arena.dualmindlab.tech/share/{threadId}`.

| `visibility` | Who can read it |
| :- | :- |
| `private` | Only you |
| `unlisted` | Anyone with the link |
| `public` | Anyone |

The Arena's share link for a thread is `https://arena.dualmindlab.tech/share/{threadId}`.


## OpenAPI

````yaml PATCH /api/threads/{threadId}/visibility
openapi: 3.1.0
info:
  title: DualMind Arena API
  version: 1.0.0
  description: >-
    The REST API behind DualMind Arena: blind battles, votes, the leaderboard,
    models and threads.
  contact:
    name: DualMind Labs
    email: support@dualmindlab.tech
    url: https://dualmindlab.tech
servers:
  - url: https://api.dualmindlab.tech
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Arena
    description: Battles and chat.
  - name: Voting
    description: Votes and the leaderboard.
  - name: Models
    description: Available models.
  - name: Threads
    description: Saved conversations and sharing.
  - name: Utilities
    description: Health and feature flags.
paths:
  /api/threads/{threadId}/visibility:
    patch:
      tags:
        - Threads
      summary: Share a thread
      description: >-
        Change who can see a thread. Share links use
        `https://arena.dualmindlab.tech/share/{threadId}`.
      operationId: setThreadVisibility
      parameters:
        - name: threadId
          in: path
          required: true
          schema:
            type: string
            format: uuid
          description: Thread ID.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - visibility
              properties:
                visibility:
                  type: string
                  enum:
                    - private
                    - unlisted
                    - public
            example:
              visibility: unlisted
      responses:
        '200':
          description: Updated.
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  message:
                    type: string
                  visibility:
                    type: string
              example:
                success: true
                message: Thread visibility updated successfully
                visibility: unlisted
        '400':
          description: Missing or invalid visibility.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          description: Only the owner can change visibility.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: No such thread.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearerAuth: []
components:
  schemas:
    Error:
      type: object
      description: >-
        Error envelope used by the threads, voting, models and settings
        endpoints.
      properties:
        success:
          type: boolean
          const: false
        error:
          type: string
          description: Human-readable message.
        code:
          type: string
          description: >-
            Machine-readable code, e.g. `INVALID_REQUEST`, `NOT_FOUND`,
            `FORBIDDEN`, `UNAUTHORIZED`, `VOTE_ERROR`.
  responses:
    Unauthorized:
      description: >-
        Missing, invalid or expired token. The body is empty; the
        `WWW-Authenticate` header explains why.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        The access token from your DualMind Arena session (a Supabase JWT). See
        Authentication.

````

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