openapi: 3.2.0
info:
  title: Scout Service Agent API
  description: Backend service for the Scout Chrome Extension — AI-powered recruiting assistant
  version: 0.1.0
tags:
- name: Agent
paths:
  /v1/agent/chat:
    post:
      tags:
      - Agent
      summary: Agent Chat
      description: 'Send a message to the Scout AI agent and receive a streaming response.


        Returns Server-Sent Events (SSE) with the agent''s response, including

        text deltas and tool use notifications.'
      operationId: agentChat
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AgentChatRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
      - HTTPBearer: []
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    AgentChatRequest:
      properties:
        message:
          anyOf:
          - type: string
          - type: 'null'
          title: Message
          description: The user's natural language message. Optional only when `resume` is set — resumed turns pick up from checkpointer state and have no new user input.
        session_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Session Id
          description: Stable ID grouping all messages in one chat thread. The extension mints a UUID per new chat and rotates it on reset so multi-turn conversations land together in Langfuse's Sessions view. Also doubles as the LangGraph thread_id so paused turns can resume.
        context:
          anyOf:
          - $ref: '#/components/schemas/AgentContext'
          - type: 'null'
          description: Page context from the Chrome extension
        conversation_history:
          anyOf:
          - items:
              $ref: '#/components/schemas/HistoryMessage'
            type: array
          - type: 'null'
          title: Conversation History
          description: Previous messages for multi-turn conversations
        resume:
          anyOf:
          - $ref: '#/components/schemas/ResumePayload'
          - type: 'null'
          description: Set to resume a turn that was paused for human review. Requires the same `session_id` as the paused turn so the checkpointer can look up its state.
      type: object
      title: AgentChatRequest
    AgentContext:
      properties:
        job_key:
          anyOf:
          - type: string
          - type: 'null'
          title: Job Key
        apply_id:
          anyOf:
          - type: integer
          - type: 'null'
          title: Apply Id
        page:
          anyOf:
          - type: string
          - type: 'null'
          title: Page
        candidate_name:
          anyOf:
          - type: string
          - type: 'null'
          title: Candidate Name
        job_title:
          anyOf:
          - type: string
          - type: 'null'
          title: Job Title
        registry_set:
          anyOf:
          - type: string
          - type: 'null'
          title: Registry Set
        user_id:
          anyOf:
          - type: integer
          - type: 'null'
          title: User Id
        quick_replies:
          anyOf:
          - items:
              $ref: '#/components/schemas/QuickReply'
            type: array
          - type: 'null'
          title: Quick Replies
      type: object
      title: AgentContext
      description: Optional context from the Chrome extension about the current page.
    ResumePayload:
      properties:
        value:
          additionalProperties: true
          type: object
          title: Value
          description: Opaque resume payload forwarded to the LangGraph node.
      type: object
      title: ResumePayload
      description: 'Client-side approval to resume a paused agent turn.


        v1 contract: any resume means "approved, continue." `value` is reserved

        for future decision shapes (e.g. operator overrides, modified args) and

        is passed verbatim into LangGraph''s `Command(resume=...)`.'
    HistoryMessage:
      properties:
        role:
          type: string
          enum:
          - user
          - assistant
          - tool
          title: Role
        content:
          anyOf:
          - type: string
          - type: 'null'
          title: Content
        tool_calls:
          anyOf:
          - items:
              $ref: '#/components/schemas/HistoryToolCall'
            type: array
          - type: 'null'
          title: Tool Calls
        tool_call_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Tool Call Id
      type: object
      required:
      - role
      title: HistoryMessage
      description: 'A single prior-turn message the client sends back on each request.


        Carries enough to rehydrate the LangChain message list the agent expects:

        - `role="user"` → HumanMessage

        - `role="assistant"` with `content` only → AIMessage (text reply)

        - `role="assistant"` with `tool_calls` → AIMessage recording a tool invocation

        - `role="tool"` with `tool_call_id` → ToolMessage (tool''s response)


        The old `{role, content}` shape still validates — new fields are optional.'
    QuickReply:
      properties:
        label:
          type: string
          title: Label
        value:
          type: string
          title: Value
      type: object
      required:
      - label
      - value
      title: QuickReply
      description: A quick reply option with a display label and a value sent as the message.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    HistoryToolCall:
      properties:
        id:
          type: string
          title: Id
        name:
          type: string
          title: Name
        args:
          additionalProperties: true
          type: object
          title: Args
      type: object
      required:
      - id
      - name
      title: HistoryToolCall
      description: A tool invocation recorded in the conversation history.
  securitySchemes:
    HTTPBearer:
      type: http
      scheme: bearer