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

# Cancel an in-flight run



## OpenAPI

````yaml /openapi/control-plane-public.json post /api/v1/runs/{runId}/cancel
openapi: 3.1.0
info:
  title: AcornOps Control Plane API
  version: 0.0.1-experimental.1
  description: >-
    Control plane API for workspaces, targets, Kubernetes clusters, virtual
    machines, sessions, runs, auth, and internal execution wiring.
servers:
  - url: https://api.acornops.dev
security: []
tags:
  - name: health
    description: Health and readiness endpoints.
  - name: auth
    description: >-
      OIDC, password, browser session, and external integration account link
      endpoints.
  - name: workspaces
    description: Workspace, target, Kubernetes cluster, and VM management endpoints.
  - name: webhooks
    description: Best-effort webhook subscription and delivery history endpoints.
  - name: sessions
    description: Session and message endpoints.
  - name: runs
    description: Run query, cancel, and stream endpoints.
  - name: workflows
    description: >-
      Workspace workflow definitions, schedules, sessions, and approval inbox
      endpoints.
  - name: agents
    description: >-
      Workspace-scoped custom agent definitions, triggers, versions, tests, and
      activity.
  - name: admin
    description: Operator-only admin API protected exclusively by admin bearer tokens.
  - name: internal
    description: Internal execution endpoints for execution-engine.
paths:
  /api/v1/runs/{runId}/cancel:
    post:
      tags:
        - runs
      summary: Cancel an in-flight run
      parameters:
        - in: path
          name: runId
          required: true
          schema:
            type: string
            format: uuid
            example: 5e709a9c-2481-4baa-aec2-ca193c50167d
      responses:
        '202':
          description: Cancellation accepted.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericAccepted'
        '400':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '409':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '500':
          description: Error response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security:
        - userSession: []
components:
  schemas:
    GenericAccepted:
      type: object
      required:
        - status
      properties:
        status:
          type: string
        message:
          type: string
        run:
          $ref: '#/components/schemas/Run'
      additionalProperties: true
    ErrorResponse:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - code
            - message
          properties:
            code:
              type: string
            message:
              type: string
            retryable:
              type: boolean
            details:
              type: object
              additionalProperties: true
              description: Optional structured error details.
    Run:
      type: object
      required:
        - id
        - workspaceId
        - sessionId
        - targetId
        - targetType
        - status
      properties:
        id:
          type: string
          format: uuid
        workspaceId:
          type: string
          format: uuid
        sessionId:
          type: string
          format: uuid
        targetId:
          type: string
          format: uuid
        targetType:
          type: string
          enum:
            - kubernetes
            - virtual_machine
        clusterId:
          type: string
          format: uuid
        status:
          type: string
        toolAccessMode:
          type: string
          enum:
            - read_only
            - read_write
        createdAt:
          type: string
          format: date-time
        startedAt:
          type: string
          format: date-time
        completedAt:
          type: string
          format: date-time
        cancelledAt:
          type: string
          format: date-time
        error:
          type: object
          additionalProperties: true
      additionalProperties: true
  securitySchemes:
    userSession:
      type: apiKey
      in: cookie
      name: acornops_cp_session

````