> ## Documentation Index > Fetch the complete documentation index at: https://checkfu.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Compare two Project revisions > Returns the paths that differ between two immutable revisions of one Project, each classified as added, removed, or modified with both content digests and byte sizes. The comparison is content-addressed from the stored manifests, so it reads no file bodies, costs no provider egress, and behaves identically for uploaded and Git Projects. Read the bodies of either side through that revision’s file endpoint. Checkfu support posture: alpha; hosted. Required evidence journey: project-mounting. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities. ## OpenAPI ````yaml /openapi.json get /v1/projects/{id}/revisions/{revision}/diff/{toRevision} openapi: 3.1.0 info: title: Checkfu API version: '2026-08-27' description: >- Authentication is declared per operation: API-key, runtime, or connector bearer; Automation signature; or credential-free pairing redemption. Every general Checkfu REST request requires the dated `Checkfu-Version` header (one of: 2026-08-27); the three MCP JSON-RPC transports use `MCP-Protocol-Version`, A2A uses `A2A-Version`, and the provider OAuth callback carries neither Checkfu header. API keys resolve one Workspace without a request selector; authenticated responses identify it with `Checkfu-Workspace-Id`. servers: - url: https://api.checkfu.com security: - bearerAuth: [] tags: - name: organizations - name: sourceRepositories - name: tenants - name: workspaces - name: principals - name: principalGroups - name: principalAccessCredentials - name: apiKeys - name: agents - name: harnesses - name: harnessRuntime - name: sandboxProfiles - name: computerProfiles - name: permissionAssignments - name: actionPolicies - name: files - name: memoryStores - name: dreams - name: modelCredentials - name: modelRoutingProfiles - name: blueprintInstallations - name: toolSources - name: skills - name: skillSources - name: agentSources - name: skillProposals - name: instructionProposals - name: catalog - name: concepts - name: support - name: connections - name: connectionVaults - name: connectionAssignments - name: connectedRuntimes - name: projects - name: collaboration - name: automationGraphs - name: automations - name: actionApprovals - name: standingApprovals - name: usage - name: models - name: outcomes - name: budgets - name: billing - name: sessions - name: audit - name: sessionExports - name: runs - name: runnerPools - name: transcripts - name: sessionWatches - name: webhookEndpoints - name: integrationGateway - name: agentDeployments - name: workEnvironments - name: computers - name: computerScreens - name: computerBrowserObservations - name: computerBrowserActions - name: environments - name: vaults - name: apiMcp - name: a2a paths: /v1/projects/{id}/revisions/{revision}/diff/{toRevision}: get: tags: - projects summary: Compare two Project revisions description: >- Returns the paths that differ between two immutable revisions of one Project, each classified as added, removed, or modified with both content digests and byte sizes. The comparison is content-addressed from the stored manifests, so it reads no file bodies, costs no provider egress, and behaves identically for uploaded and Git Projects. Read the bodies of either side through that revision’s file endpoint. Checkfu support posture: alpha; hosted. Required evidence journey: project-mounting. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities. operationId: projects.diffProjectRevisions parameters: - name: id in: path schema: $ref: '#/components/schemas/ProjectId' required: true - name: revision in: path schema: type: integer minimum: 1 required: true - name: toRevision in: path schema: type: integer minimum: 1 required: true - name: checkfu-version in: header schema: type: string enum: - '2026-08-27' required: true responses: '200': description: Success content: application/json: schema: type: object properties: from_revision: type: integer allOf: - exclusiveMinimum: 0 to_revision: type: integer allOf: - exclusiveMinimum: 0 data: type: array items: anyOf: - type: object properties: path: $ref: '#/components/schemas/ProjectPath' change: type: string enum: - added from_content_digest: type: 'null' to_content_digest: type: string allOf: - pattern: >- ^(?:sha256:[0-9a-f]{64}|git-sha1:[0-9a-f]{40}|git-sha256:[0-9a-f]{64})$ from_bytes: type: 'null' to_bytes: type: integer allOf: - minimum: 0 required: - path - change - from_content_digest - to_content_digest - from_bytes - to_bytes additionalProperties: false - type: object properties: path: $ref: '#/components/schemas/ProjectPath' change: type: string enum: - removed from_content_digest: type: string allOf: - pattern: >- ^(?:sha256:[0-9a-f]{64}|git-sha1:[0-9a-f]{40}|git-sha256:[0-9a-f]{64})$ to_content_digest: type: 'null' from_bytes: type: integer allOf: - minimum: 0 to_bytes: type: 'null' required: - path - change - from_content_digest - to_content_digest - from_bytes - to_bytes additionalProperties: false - type: object properties: path: $ref: '#/components/schemas/ProjectPath' change: type: string enum: - modified from_content_digest: type: string allOf: - pattern: >- ^(?:sha256:[0-9a-f]{64}|git-sha1:[0-9a-f]{40}|git-sha256:[0-9a-f]{64})$ to_content_digest: type: string allOf: - pattern: >- ^(?:sha256:[0-9a-f]{64}|git-sha1:[0-9a-f]{40}|git-sha256:[0-9a-f]{64})$ from_bytes: type: integer allOf: - minimum: 0 to_bytes: type: integer allOf: - minimum: 0 required: - path - change - from_content_digest - to_content_digest - from_bytes - to_bytes additionalProperties: false required: - from_revision - to_revision - data additionalProperties: false headers: checkfu-workspace-id: description: The Workspace resolved from the authenticated bearer credential. required: true schema: $ref: '#/components/schemas/WorkspaceId' '400': description: Typed Checkfu wire error content: application/json: schema: type: object required: - error properties: error: type: object properties: type: type: string enum: - validation.malformed message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#validation-malformed description: >- Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false additionalProperties: false '401': description: Typed Checkfu wire error content: application/json: schema: type: object required: - error properties: error: type: object required: - type - message - more properties: type: type: string enum: - auth.invalid_key message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#auth-invalid-key description: >- Stable public documentation and remedy for this error type. additionalProperties: false additionalProperties: false '403': description: >- The organization, tenant, or workspace backing this key is administratively disabled. | Deployment governance or retention policy denied the request. content: application/json: schema: anyOf: - type: object required: - error properties: error: type: object properties: type: type: string enum: - auth.disabled_tenancy message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#auth-disabled-tenancy description: >- Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false additionalProperties: false - $ref: '#/components/schemas/PolicyDeniedError' '404': description: >- The requested resource does not exist in the resolved deployment boundary. content: application/json: schema: $ref: '#/components/schemas/ValidationNotFoundError' '429': description: Typed Checkfu wire error headers: retry-after: description: >- Delay in seconds for rate limits or deployment quotas with a known release or UTC reset boundary required: false schema: type: integer minimum: 1 content: application/json: schema: type: object required: - error properties: error: type: object required: - type - message - more properties: type: type: string enum: - budget.exceeded message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#budget-exceeded description: >- Stable public documentation and remedy for this error type. additionalProperties: false additionalProperties: false '500': description: >- An unexpected internal failure occurred; the message contains an opaque incident reference. content: application/json: schema: $ref: '#/components/schemas/RuntimeInternalError' security: - bearerAuth: [] components: schemas: ProjectId: type: string allOf: - pattern: ^prj_[0-9a-f]{32}$ ProjectPath: type: string allOf: - minLength: 1 - maxLength: 1024 WorkspaceId: type: string allOf: - pattern: ^wrkspc_[0-9a-f]{32}$ PolicyDeniedError: type: object properties: error: type: object properties: type: type: string enum: - policy.denied message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#policy-denied description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: Deployment governance or retention policy denied the request. ValidationNotFoundError: type: object properties: error: type: object properties: type: type: string enum: - validation.not_found message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#validation-not-found description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- The requested resource does not exist in the resolved deployment boundary. RuntimeInternalError: type: object properties: error: type: object properties: type: type: string enum: - runtime.internal message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#runtime-internal description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- An unexpected internal failure occurred; the message contains an opaque incident reference. securitySchemes: bearerAuth: type: http scheme: bearer ````