> ## Documentation Index > Fetch the complete documentation index at: https://docs.coderabbit.ai/llms.txt > Use this file to discover all available pages before exploring further. # Read one saved Change Stack layer's diff > Requires the overview snapshot_id and group-local layer ID. Returns file-paged unified patches for that exact snapshot; unavailable provider patches remain explicit. Follow next_page_token with the same parameters. No review or generation is started. ## OpenAPI ````yaml /openapi.json get /v1/repositories/{repository_id}/pull-requests/{pull_request_number}/change-stack/groups/{group_id}/layers/{layer_id}/diff openapi: 3.0.3 info: title: CodeRabbit API spec version: 1.0.0 servers: - url: https://api.coderabbit.ai security: - ApiKeyAuth: [] paths: /v1/repositories/{repository_id}/pull-requests/{pull_request_number}/change-stack/groups/{group_id}/layers/{layer_id}/diff: get: tags: - Reviews summary: Read one saved Change Stack layer's diff description: >- Requires the overview snapshot_id and group-local layer ID. Returns file-paged unified patches for that exact snapshot; unavailable provider patches remain explicit. Follow next_page_token with the same parameters. No review or generation is started. operationId: get_pull_request_change_stack_layer_diff parameters: - name: repository_id in: path required: true schema: type: string minLength: 1 - name: pull_request_number in: path required: true schema: type: integer minimum: 0 maximum: 2147483647 exclusiveMinimum: true - name: group_id in: path required: true schema: type: string minLength: 1 - name: layer_id in: path required: true schema: type: string minLength: 1 - name: org_id in: query required: false schema: type: string allowEmptyValue: true allowReserved: true - name: snapshot_id in: query required: true schema: type: string minLength: 1 allowEmptyValue: true allowReserved: true - name: path in: query required: false schema: type: string minLength: 1 allowEmptyValue: true allowReserved: true - name: page_size in: query required: false schema: type: integer minimum: 1 maximum: 100 default: 50 allowEmptyValue: true allowReserved: true - name: page_token in: query required: false schema: type: string minLength: 1 allowEmptyValue: true allowReserved: true responses: '200': description: OK content: application/json: schema: type: object properties: snapshot_id: type: string group_id: type: string layer_id: type: string data: type: array items: type: object properties: path: type: string previous_path: anyOf: - type: string - type: string nullable: true enum: - null availability: enum: - available - unavailable type: string patch: anyOf: - type: string - type: string nullable: true enum: - null additions: anyOf: - type: integer minimum: 0 maximum: 9007199254740991 - type: string nullable: true enum: - null deletions: anyOf: - type: integer minimum: 0 maximum: 9007199254740991 - type: string nullable: true enum: - null ranges: type: array items: type: object properties: side: enum: - old - new type: string start_line: anyOf: - type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true - type: string nullable: true enum: - null end_line: anyOf: - type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true - type: string nullable: true enum: - null summary: type: string required: - side - start_line - end_line - summary required: - path - previous_path - availability - patch - additions - deletions - ranges next_page_token: anyOf: - type: string - type: string nullable: true enum: - null required: - snapshot_id - group_id - layer_id - data - next_page_token '400': description: '400' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - invalid_request type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '401': description: '401' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - unauthenticated type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '403': description: '403' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - forbidden type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '404': description: '404' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - not_found type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '409': description: '409' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - head_changed - conflict type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '412': description: '412' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - precondition_failed type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '413': description: '413' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - payload_too_large type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '429': description: '429' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - rate_limit_exceeded type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '500': description: '500' content: application/json: schema: type: object properties: error: type: object properties: code: enum: - internal_error type: string message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false '503': description: '503' content: application/json: schema: type: object properties: error: type: object properties: code: type: string enum: - unavailable message: type: string retry_after: type: integer minimum: 0 maximum: 9007199254740991 exclusiveMinimum: true required: - code - message additionalProperties: false required: - error additionalProperties: false components: securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-coderabbitai-api-key description: >- API key for authentication. You can create an API key from the CodeRabbit dashboard. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.