> ## Documentation Index > Fetch the complete documentation index at: https://docs.riftmap.dev/llms.txt > Use this file to discover all available pages before exploring further. # Transitive downstream blast radius (repo-level BFS). NOT file-path scoped — accepts only `max_depth` + `min_confidence`. > Get the full downstream impact of changing this repository. Returns all repositories that depend on this one, directly or transitively, up to ``max_depth`` hops away. Use this before publishing a breaking change. **Repo-level scope, not file-scoped.** This endpoint computes a BFS over repo-to-repo dependency edges; it does **not** trace specific files, jobs, or symbols within the source repo. There is no ``path``, ``paths``, ``file``, or ``job`` query parameter — agents asking "who consumes file X in repo Y" should call ``/repositories/{id}/dependents`` and then grep the consumer repos directly, since per-file edges aren't stored in the graph. Unknown query parameters are silently ignored by FastAPI, which can mask hallucinated filter names — if a filter doesn't appear in this signature, it's not honoured. For artifact-level consumers (who pulls Docker image / Helm chart / Terraform module X and at what version), use ``/artifacts/{id}/consumers`` instead — that endpoint *is* version-aware. ## OpenAPI ````yaml /openapi.json get /api/v1/repositories/{repo_id}/impact openapi: 3.1.0 info: description: Change Impact Engine for multi-repo systems title: Riftmap version: 1.7.5 servers: [] security: [] paths: /api/v1/repositories/{repo_id}/impact: get: tags: - impact summary: >- Transitive downstream blast radius (repo-level BFS). NOT file-path scoped — accepts only `max_depth` + `min_confidence`. description: >- Get the full downstream impact of changing this repository. Returns all repositories that depend on this one, directly or transitively, up to ``max_depth`` hops away. Use this before publishing a breaking change. **Repo-level scope, not file-scoped.** This endpoint computes a BFS over repo-to-repo dependency edges; it does **not** trace specific files, jobs, or symbols within the source repo. There is no ``path``, ``paths``, ``file``, or ``job`` query parameter — agents asking "who consumes file X in repo Y" should call ``/repositories/{id}/dependents`` and then grep the consumer repos directly, since per-file edges aren't stored in the graph. Unknown query parameters are silently ignored by FastAPI, which can mask hallucinated filter names — if a filter doesn't appear in this signature, it's not honoured. For artifact-level consumers (who pulls Docker image / Helm chart / Terraform module X and at what version), use ``/artifacts/{id}/consumers`` instead — that endpoint *is* version-aware. operationId: repository_impact_api_v1_repositories__repo_id__impact_get parameters: - in: path name: repo_id required: true schema: format: uuid title: Repo Id type: string - description: >- Maximum BFS depth (hops from the source repo). Range 1–20, default 10. in: query name: max_depth required: false schema: default: 10 description: >- Maximum BFS depth (hops from the source repo). Range 1–20, default 10. maximum: 20 minimum: 1 title: Max Depth type: integer - description: >- Minimum edge confidence to traverse. Default 0.8 excludes heuristic findings (0.4–0.7) and only follows deterministic dependency edges. Set to 0.0 to include all edges. in: query name: min_confidence required: false schema: default: 0.8 description: >- Minimum edge confidence to traverse. Default 0.8 excludes heuristic findings (0.4–0.7) and only follows deterministic dependency edges. Set to 0.0 to include all edges. maximum: 1 minimum: 0 title: Min Confidence type: number - in: header name: X-Workspace-Id required: false schema: anyOf: - type: string - type: 'null' title: X-Workspace-Id - in: cookie name: riftmap_access required: false schema: anyOf: - type: string - type: 'null' title: Riftmap Access responses: '200': content: application/json: schema: $ref: '#/components/schemas/ImpactResponse' description: Successful Response '422': content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' description: Validation Error security: - APIKeyHeader: [] - HTTPBearer: [] components: schemas: ImpactResponse: description: Full downstream impact of changing a repository. properties: affected_repositories: items: $ref: '#/components/schemas/AffectedRepository' title: Affected Repositories type: array max_depth_reached: title: Max Depth Reached type: integer source_repository: additionalProperties: true title: Source Repository type: object total_affected: title: Total Affected type: integer required: - source_repository - affected_repositories - total_affected - max_depth_reached title: ImpactResponse type: object HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' title: Detail type: array title: HTTPValidationError type: object AffectedRepository: description: A repository affected by a change to the source repository. properties: confidence: title: Confidence type: number depth: title: Depth type: integer full_path: title: Full Path type: string id: format: uuid title: Id type: string name: title: Name type: string required: - id - name - full_path - depth - confidence title: AffectedRepository type: object ValidationError: properties: ctx: title: Context type: object input: title: Input loc: items: anyOf: - type: string - type: integer title: Location type: array msg: title: Message type: string type: title: Error Type type: string required: - loc - msg - type title: ValidationError type: object securitySchemes: APIKeyHeader: in: header name: X-API-Key type: apiKey HTTPBearer: description: API key as Bearer token (rfm_live_... prefix) scheme: bearer type: http ````