> ## Documentation Index > Fetch the complete documentation index at: https://docs.firedrill.run/llms.txt > Use this file to discover all available pages before exploring further. # Cancel a browser CI run > Requires run.cancel and exact browserCiRunId confirmation. Repeated cancellation is safe; cancellation is recorded durably before child cleanup and survives coordinator restart. Poll until cancelled or superseded. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/projects/{projectId}/repositories/{repositoryBindingId}/browser-ci/runs/{browserCiRunId}/cancel openapi: 3.1.0 info: title: Firedrill Control API version: 1.0.0 description: >- The control plane for drills, drill runs, and the worlds they run in. Errors always carry the canonical envelope; unsafe operations require an Idempotency-Key; long work returns an operation resource. servers: - url: https://api.firedrill.run security: - controlCredential: [] tags: - name: authentication description: Sessions, CLI exchange, credentials, and verification keys. x-group: Authentication - name: organizations description: Organization members, billing, usage, retention, audit, and exports. x-group: Organizations - name: projects description: Project lifecycle, access, grants, and repository bindings. x-group: Projects - name: builds description: Immutable builds, uploads, source drafts, and world definitions. x-group: Builds and source - name: tools description: Project Tool discovery, approval, source, and revocation. x-group: Tool library - name: worlds description: >- Managed environments, world sessions, state, time, reset, faults, forks, and snapshots. x-group: Environments and sessions - name: runs description: >- Hosted runs, comparisons, attachments, reports, evidence bundles, sharing, and exports. x-group: Runs and evidence - name: browser description: Managed browser tests, runs, messages, streams, frames, and artifacts. x-group: Browser testing - name: callbacks description: Callback receiver approval, revocation, and signing material. x-group: Callbacks - name: github-ci description: >- GitHub installations, repository automation, CI suites, cases, evidence, and checks. x-group: GitHub and CI - name: authoring description: Authoring sessions, proposals, turns, and scenario proposals. x-group: Cloud authoring paths: /v1/projects/{projectId}/repositories/{repositoryBindingId}/browser-ci/runs/{browserCiRunId}/cancel: post: tags: - github-ci summary: Cancel a browser CI run description: >- Requires run.cancel and exact browserCiRunId confirmation. Repeated cancellation is safe; cancellation is recorded durably before child cleanup and survives coordinator restart. Poll until cancelled or superseded. operationId: browserCi.cancelRun parameters: - name: projectId in: path required: true schema: type: string pattern: ^prj_[0-9a-z]{12,32}$ - name: repositoryBindingId in: path required: true schema: type: string pattern: ^repo_[0-9a-z]{12,32}$ - name: browserCiRunId in: path required: true schema: type: string pattern: ^bci_[0-9a-z]{12,32}$ - name: Idempotency-Key in: header required: true schema: type: string minLength: 8 maxLength: 128 pattern: ^[A-Za-z0-9._:-]+$ requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CancelBrowserCiRunRequest' responses: '200': description: Mutation result or original idempotency receipt content: application/json: schema: $ref: '#/components/schemas/BrowserCiRun' '400': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '401': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '403': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '404': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '409': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '429': description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' default: description: Canonical error envelope content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' components: schemas: CancelBrowserCiRunRequest: type: object properties: confirm: type: string pattern: ^bci_[0-9a-z]{12,32}$ required: - confirm additionalProperties: false BrowserCiRun: type: object properties: schemaVersion: type: number enum: - 1 browserCiRunId: type: string pattern: ^bci_[0-9a-z]{12,32}$ organizationId: type: string pattern: ^org_[0-9a-z]{12,32}$ projectId: type: string pattern: ^prj_[0-9a-z]{12,32}$ repositoryBindingId: type: string pattern: ^repo_[0-9a-z]{12,32}$ configVersion: type: integer minimum: -9007199254740991 maximum: 9007199254740991 pullRequestNumber: type: integer minimum: 0 exclusiveMinimum: true maximum: 9007199254740991 baseRevision: type: string pattern: ^[0-9a-f]{40}$ candidateRevision: type: string pattern: ^[0-9a-f]{40}$ state: type: string enum: - queued - running - cancelling - passed - failed - cancelled - superseded selection: type: object properties: mode: type: string enum: - all - change_aware changedFilesComplete: type: boolean fallbackReason: type: string enum: - disabled - incomplete_diff - invalid_path - global_change - unmapped_change - no_selected_tests - empty_diff selected: maxItems: 100 type: array items: type: object properties: testId: type: string pattern: ^[A-Za-z0-9][A-Za-z0-9._-]{0,95}$ reason: type: string enum: - all - always - unmapped_test - changed_path matchedPaths: maxItems: 100 type: array items: type: string required: - testId - reason - matchedPaths additionalProperties: false omittedTestIds: maxItems: 100 type: array items: type: string pattern: ^[A-Za-z0-9][A-Za-z0-9._-]{0,95}$ changedFileCount: type: integer minimum: 0 maximum: 9007199254740991 required: - mode - changedFilesComplete - selected - omittedTestIds - changedFileCount additionalProperties: false cases: maxItems: 100 type: array items: type: object properties: testId: type: string pattern: ^[A-Za-z0-9][A-Za-z0-9._-]{0,95}$ testVersion: type: integer minimum: -9007199254740991 maximum: 9007199254740991 runId: type: string state: type: string enum: - pending - queued - running - passed - failed - completed - cancelled required: - testId - testVersion - state additionalProperties: false delivery: type: string enum: - pending - delivered - superseded failureCode: type: string maxLength: 100 evidenceUrl: type: string format: uri createdAtMs: type: integer minimum: -9007199254740991 maximum: 9007199254740991 updatedAtMs: type: integer minimum: -9007199254740991 maximum: 9007199254740991 version: type: integer minimum: -9007199254740991 maximum: 9007199254740991 required: - schemaVersion - browserCiRunId - organizationId - projectId - repositoryBindingId - configVersion - pullRequestNumber - baseRevision - candidateRevision - state - selection - cases - delivery - evidenceUrl - createdAtMs - updatedAtMs - version additionalProperties: false ErrorEnvelope: type: object properties: code: type: string pattern: ^(control|world)\.[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$ message: type: string minLength: 1 correlationId: type: string minLength: 1 retryable: type: boolean retryAfterMs: type: integer exclusiveMinimum: 0 maximum: 9007199254740991 operationId: type: string source: type: string enum: - platform - simulated_provider issues: type: array items: type: object properties: path: type: string code: type: string message: type: string required: - path - code - message additionalProperties: false details: type: object propertyNames: type: string additionalProperties: {} evidence: type: object properties: sessionId: type: string runId: type: string journalSeq: type: integer minimum: 0 maximum: 9007199254740991 buildHash: type: string additionalProperties: false required: - code - message - correlationId - retryable - source additionalProperties: true securitySchemes: controlCredential: type: http scheme: bearer description: Opaque control credential ````