{
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        "evidence": [],
        "note": "no network surface"
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       {
        "level": 2,
        "id": "contract",
        "text": "A contract exists: a checked-in OpenAPI/GraphQL/protobuf/AsyncAPI spec, a framework-generated spec, MCP tool schemas, or a standard application protocol that off-the-shelf clients speak (RESP, MQTT, gRPC, PostgreSQL wire, \u2026).",
        "met": false,
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        "level": 3,
        "id": "coverage",
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        "note": "no contract"
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        "level": 4,
        "id": "second-surface",
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        "id": "non-interactive",
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        "level": 3,
        "id": "machine-output",
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        "evidence": [],
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       {
        "level": 4,
        "id": "output-schema",
        "text": "The output format is specified by a JSON Schema.",
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        "note": "no JSON Schema for the output"
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     },
     "library": {
      "level": 1,
      "first_missing": "public-api",
      "requirements": [
       {
        "level": 1,
        "id": "importable",
        "text": "An importable, packaged API exists.",
        "met": true,
        "evidence": [
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          "path": "pyproject.toml",
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        ],
        "note": ""
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       {
        "level": 2,
        "id": "public-api",
        "text": "The public API is delimited (__all__, an exports map, exported identifiers).",
        "met": false,
        "evidence": [],
        "note": "no __all__/exports defining the public API"
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       {
        "level": 3,
        "id": "typed",
        "text": "The public API is statically typed (py.typed, type declarations, a typed language).",
        "met": true,
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         {
          "path": "src/flask/py.typed",
          "detail": "py.typed"
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        ],
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       {
        "level": 4,
        "id": "api-reference",
        "text": "An API reference is generated from the code (autodoc, mkdocstrings, typedoc, \u2026).",
        "met": true,
        "evidence": [
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          "path": "docs/conf.py",
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    },
    "level_name": "ad hoc",
    "applicable": true
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   {
    "key": "stability",
    "title": "Contract stability",
    "level": 3,
    "rationale": "A deprecation mechanism is used in code (warnings, @deprecated, Deprecation/Sunset headers) or the API is versioned.",
    "evidence": [
     {
      "signal": "L1 versioned-releases",
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      "signal": "L2 changelog",
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      "path": "CHANGES.rst",
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      "signal": "L3 deprecation",
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      "path": "src/flask/app.py",
      "weight": 1
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    ],
    "metrics": {},
    "gaps": [
     "L4 Across tagged releases, no OpenAPI operation, CLI option or __all__ symbol was removed without first being deprecated. (removed without prior deprecation: option --all (removed in 1.0.x), option --browse (removed in 1.0.x), option --env (removed in 1.0.x))"
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    "question": "Can integrators rely on it not changing under them?",
    "best_surface": "all",
    "surfaces": {
     "all": {
      "level": 3,
      "first_missing": "clean-history",
      "requirements": [
       {
        "level": 1,
        "id": "versioned-releases",
        "text": "Releases are versioned (semver tags or versioned changelog sections).",
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        "evidence": [
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          "path": null,
          "detail": "69 semver tags, latest 3.1.3"
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        ],
        "note": ""
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       {
        "level": 2,
        "id": "changelog",
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        "met": true,
        "evidence": [
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          "path": "CHANGES.rst",
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        ],
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       {
        "level": 3,
        "id": "deprecation",
        "text": "A deprecation mechanism is used in code (warnings, @deprecated, Deprecation/Sunset headers) or the API is versioned.",
        "met": true,
        "evidence": [
         {
          "path": "src/flask/app.py",
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         {
          "path": "src/flask/ctx.py",
          "detail": "2 matches"
         },
         {
          "path": "src/flask/globals.py",
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         }
        ],
        "note": ""
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       {
        "level": 4,
        "id": "clean-history",
        "text": "Across tagged releases, no OpenAPI operation, CLI option or __all__ symbol was removed without first being deprecated.",
        "met": false,
        "evidence": [],
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    "level_name": "solid",
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    "rationale": "Not yet: Internal events exist (signals, queues, an outbox, emitters).",
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    "metrics": {},
    "gaps": [
     "L1 Internal events exist (signals, queues, an outbox, emitters). (no internal events)"
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    "question": "Can others react to state changes without polling?",
    "best_surface": "service",
    "surfaces": {
     "service": {
      "level": 0,
      "first_missing": "internal-events",
      "requirements": [
       {
        "level": 1,
        "id": "internal-events",
        "text": "Internal events exist (signals, queues, an outbox, emitters).",
        "met": false,
        "evidence": [],
        "note": "no internal events"
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       {
        "level": 2,
        "id": "outbound",
        "text": "Webhooks sent by this system, or a streaming endpoint (SSE, WebSocket).",
        "met": false,
        "evidence": [],
        "note": "no outbound webhooks or streams"
       },
       {
        "level": 3,
        "id": "robust-delivery",
        "text": "Signed webhooks registrable through the API, or two mechanisms (webhooks, streams, a broker).",
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        "evidence": [],
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        "level": 4,
        "id": "event-contract",
        "text": "Events are described by AsyncAPI or CloudEvents.",
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        "evidence": [],
        "note": "no AsyncAPI or CloudEvents contract"
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    },
    "level_name": "absent",
    "applicable": true
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   {
    "key": "identity",
    "title": "Identity",
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    "rationale": "Not yet: Programmatic authentication (bearer tokens, API keys).",
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    "gaps": [
     "L1 Programmatic authentication (bearer tokens, API keys). (no token auth)"
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    "question": "Can a machine act with its own revocable, least-privilege identity?",
    "best_surface": "service",
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     "service": {
      "level": 0,
      "first_missing": "token-auth",
      "requirements": [
       {
        "level": 1,
        "id": "token-auth",
        "text": "Programmatic authentication (bearer tokens, API keys).",
        "met": false,
        "evidence": [],
        "note": "no token auth"
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       {
        "level": 2,
        "id": "managed-credentials",
        "text": "Per-client, revocable credentials (managed API keys, service accounts) or OAuth2.",
        "met": false,
        "evidence": [],
        "note": "no managed keys or OAuth"
       },
       {
        "level": 3,
        "id": "scopes",
        "text": "Credentials carry scopes or permissions.",
        "met": false,
        "evidence": [],
        "note": "no scopes or permissions"
       },
       {
        "level": 4,
        "id": "federation",
        "text": "Standard provisioning or federation (OIDC client credentials, SCIM).",
        "met": false,
        "evidence": [],
        "note": "no OIDC client credentials or SCIM"
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    "level_name": "absent",
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   {
    "key": "portability",
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    "gaps": [
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    "question": "Can its data get in and out, in bulk, in open formats, with an explicit schema?",
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      "first_missing": "export",
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        "evidence": [
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          "path": "examples/tutorial/flaskr/schema.sql",
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        "id": "export",
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        "note": "no export"
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        "level": 3,
        "id": "bulk-open",
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        "evidence": [],
        "note": "no import"
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        "id": "documented-round-trip",
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        "evidence": [],
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     }
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    "key": "ergonomics",
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    "rationale": "[library] Inputs are validated with messages naming the bad argument.",
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      "path": "src/flask/debughelpers.py",
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     },
     {
      "signal": "L2 validation",
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      "path": "src/flask/ctx.py",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "[service] L2 Field-level validation errors, and paginated lists. (no request validation)",
     "[cli] L2 Data on stdout, diagnostics on stderr, non-zero exit on failure. (no non-zero exit on failure)",
     "[library] L3 Timeouts and retries are configurable. (no timeout parameter)"
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    "question": "Can an automated caller use it without guessing, and recover from failure?",
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      "level": 1,
      "first_missing": "validation-pagination",
      "requirements": [
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        "level": 1,
        "id": "json-errors",
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        "note": ""
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        "level": 2,
        "id": "validation-pagination",
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        "evidence": [],
        "note": "no request validation"
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       {
        "level": 3,
        "id": "safe-retries",
        "text": "Typed errors (RFC 9457 over HTTP, or a standard protocol's typed error codes), idempotent writes (Idempotency-Key), and rate-limit signals.",
        "met": false,
        "evidence": [],
        "note": "no typed errors"
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       {
        "level": 4,
        "id": "agent-ready",
        "text": "Dry-run or validate-only, conditional requests, and agent docs.",
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        "evidence": [],
        "note": "no dry-run"
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      ]
     },
     "cli": {
      "level": 1,
      "first_missing": "streams-and-status",
      "requirements": [
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        "level": 1,
        "id": "never-blocks",
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        "evidence": [
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          "path": null,
          "detail": "no interactive prompts"
         }
        ],
        "note": ""
       },
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        "level": 2,
        "id": "streams-and-status",
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        "evidence": [],
        "note": "no non-zero exit on failure"
       },
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        "level": 3,
        "id": "typed-failures",
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        "met": false,
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        "id": "agent-ready",
        "text": "--dry-run, limits for long or costly operations (timeouts, budgets), and agent docs.",
        "met": false,
        "evidence": [],
        "note": "no --dry-run"
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      ]
     },
     "library": {
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      "first_missing": "timeouts-retries",
      "requirements": [
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        "level": 1,
        "id": "typed-exceptions",
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        "met": true,
        "evidence": [
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          "path": "src/flask/debughelpers.py",
          "detail": "1 match"
         },
         {
          "path": null,
          "detail": "no sys.exit in library code"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "validation",
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        "met": true,
        "evidence": [
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          "detail": "7 matches"
         },
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         },
         {
          "path": "src/flask/sansio/app.py",
          "detail": "4 matches"
         },
         {
          "path": "src/flask/testing.py",
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         },
         {
          "path": "src/flask/blueprints.py",
          "detail": "2 matches"
         },
         {
          "path": "src/flask/helpers.py",
          "detail": "2 matches"
         },
         {
          "path": "src/flask/json/provider.py",
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         },
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          "path": "src/flask/config.py",
          "detail": "1 match"
         },
         {
          "path": "src/flask/json/tag.py",
          "detail": "1 match"
         },
         {
          "path": "src/flask/sessions.py",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "timeouts-retries",
        "text": "Timeouts and retries are configurable.",
        "met": false,
        "evidence": [],
        "note": "no timeout parameter"
       },
       {
        "level": 4,
        "id": "agent-ready",
        "text": "Agent docs, and examples that run as tests (doctests).",
        "met": false,
        "evidence": [],
        "note": "no agent docs"
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      ]
     }
    },
    "level_name": "partial",
    "applicable": true
   },
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    "key": "embeddability",
    "title": "Embeddability",
    "level": 4,
    "rationale": "[library] Optional features behind extras/features.",
    "evidence": [
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      "signal": "L1 importable",
      "detail": "Python package flask",
      "path": "pyproject.toml",
      "weight": 1
     },
     {
      "signal": "L2 installable",
      "detail": "package manifest",
      "path": "pyproject.toml",
      "weight": 1
     },
     {
      "signal": "L3 published-minimal",
      "detail": "1 match",
      "path": ".github/workflows/publish.yaml",
      "weight": 1
     },
     {
      "signal": "L4 optional-features",
      "detail": "1 match",
      "path": "examples/javascript/pyproject.toml",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "[service] L3 A container image. (no Dockerfile)",
     "[cli] L3 Published to a public registry and run non-interactively in CI. (the command isn't run in CI)"
    ],
    "question": "Can another system run and compose it without a human?",
    "best_surface": "library",
    "surfaces": {
     "service": {
      "level": 2,
      "first_missing": "container",
      "requirements": [
       {
        "level": 1,
        "id": "documented-run",
        "text": "Runnable from source with documented steps (a README with commands).",
        "met": true,
        "evidence": [
         {
          "path": "README.md",
          "detail": ""
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "env-config",
        "text": "Configured through environment variables, documented: a .env example, a config schema, or docs naming at least half of the variables the code reads.",
        "met": true,
        "evidence": [
         {
          "path": "src/flask/cli.py",
          "detail": "5 matches"
         },
         {
          "path": "src/flask/config.py",
          "detail": "3 matches"
         },
         {
          "path": "src/flask/app.py",
          "detail": "2 matches"
         },
         {
          "path": "src/flask/helpers.py",
          "detail": "2 matches"
         },
         {
          "path": null,
          "detail": "30 of 31 environment variables named in the docs"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "container",
        "text": "A container image.",
        "met": false,
        "evidence": [],
        "note": "no Dockerfile"
       },
       {
        "level": 4,
        "id": "composition",
        "text": "Composition artifacts (compose, Helm, IaC).",
        "met": false,
        "evidence": [],
        "note": "no compose/Helm/IaC"
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      ]
     },
     "cli": {
      "level": 2,
      "first_missing": "published",
      "requirements": [
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        "level": 1,
        "id": "runnable",
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        "met": true,
        "evidence": [
         {
          "path": "pyproject.toml",
          "detail": "console script"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "installable",
        "text": "Installable as a package that provides the command.",
        "met": true,
        "evidence": [
         {
          "path": "pyproject.toml",
          "detail": "console script"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "published",
        "text": "Published to a public registry and run non-interactively in CI.",
        "met": false,
        "evidence": [],
        "note": "the command isn't run in CI"
       },
       {
        "level": 4,
        "id": "container-or-binary",
        "text": "Also shipped as a container image or a single binary.",
        "met": false,
        "evidence": [],
        "note": "no container image or binary"
       }
      ]
     },
     "library": {
      "level": 4,
      "first_missing": null,
      "requirements": [
       {
        "level": 1,
        "id": "importable",
        "text": "Importable from source.",
        "met": true,
        "evidence": [
         {
          "path": "pyproject.toml",
          "detail": "Python package flask"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "installable",
        "text": "Installable as a package (a package manifest).",
        "met": true,
        "evidence": [
         {
          "path": "pyproject.toml",
          "detail": "package manifest"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "published-minimal",
        "text": "Published to a public registry, with at most 10 runtime dependencies.",
        "met": true,
        "evidence": [
         {
          "path": ".github/workflows/publish.yaml",
          "detail": "1 match"
         },
         {
          "path": null,
          "detail": "1 runtime dependencies"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "optional-features",
        "text": "Optional features behind extras/features.",
        "met": true,
        "evidence": [
         {
          "path": "examples/javascript/pyproject.toml",
          "detail": "1 match"
         },
         {
          "path": "examples/tutorial/pyproject.toml",
          "detail": "1 match"
         },
         {
          "path": "pyproject.toml",
          "detail": "1 match"
         }
        ],
        "note": ""
       }
      ]
     }
    },
    "level_name": "exemplary",
    "applicable": true
   },
   {
    "key": "extensibility",
    "title": "Extensibility",
    "level": 0,
    "rationale": "Not yet: Internal seams: a registry, registration function or plugin manager.",
    "evidence": [],
    "metrics": {},
    "gaps": [
     "L1 Internal seams: a registry, registration function or plugin manager. (no registry or registration function)"
    ],
    "question": "Can behaviour be added without modifying the code?",
    "best_surface": "all",
    "surfaces": {
     "all": {
      "level": 0,
      "first_missing": "seams",
      "requirements": [
       {
        "level": 1,
        "id": "seams",
        "text": "Internal seams: a registry, registration function or plugin manager.",
        "met": false,
        "evidence": [],
        "note": "no registry or registration function"
       },
       {
        "level": 2,
        "id": "documented",
        "text": "The docs show how to add behaviour through those seams (even in-tree).",
        "met": false,
        "evidence": [],
        "note": "no registration functions to document"
       },
       {
        "level": 3,
        "id": "out-of-tree",
        "text": "Out-of-tree extensions are discovered (entry points, a plugin directory, configuration) without editing the package.",
        "met": true,
        "evidence": [
         {
          "path": "src/flask/cli.py",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "versioned-api",
        "text": "The extension API is versioned, has lifecycle hooks, and has example extensions.",
        "met": false,
        "evidence": [],
        "note": "the extension API isn't versioned"
       }
      ]
     }
    },
    "level_name": "absent",
    "applicable": true
   },
   {
    "key": "observability",
    "title": "Observability",
    "level": 0,
    "rationale": "[service] Not yet: A health or readiness endpoint, or a container healthcheck.",
    "evidence": [],
    "metrics": {},
    "gaps": [
     "[service] L1 A health or readiness endpoint, or a container healthcheck. (no health endpoint or healthcheck)",
     "[cli] L1 Meaningful exit statuses, and errors on stderr. (no non-zero exit on failure)",
     "[library] L1 Logs through a standard logger namespace and never prints from library code. (no standard logger)"
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    "question": "Can an operator, or an orchestrating agent, tell whether it works and why not?",
    "best_surface": "service",
    "surfaces": {
     "service": {
      "level": 0,
      "first_missing": "health",
      "requirements": [
       {
        "level": 1,
        "id": "health",
        "text": "A health or readiness endpoint, or a container healthcheck.",
        "met": false,
        "evidence": [],
        "note": "no health endpoint or healthcheck"
       },
       {
        "level": 2,
        "id": "structured-logs",
        "text": "Structured logs.",
        "met": false,
        "evidence": [],
        "note": "no structured logging"
       },
       {
        "level": 3,
        "id": "metrics",
        "text": "Metrics.",
        "met": false,
        "evidence": [],
        "note": "no metrics"
       },
       {
        "level": 4,
        "id": "tracing",
        "text": "Distributed tracing (OpenTelemetry).",
        "met": false,
        "evidence": [],
        "note": "no tracing"
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      ]
     },
     "cli": {
      "level": 0,
      "first_missing": "exit-and-stderr",
      "requirements": [
       {
        "level": 1,
        "id": "exit-and-stderr",
        "text": "Meaningful exit statuses, and errors on stderr.",
        "met": false,
        "evidence": [],
        "note": "no non-zero exit on failure"
       },
       {
        "level": 2,
        "id": "verbosity",
        "text": "Verbosity control for diagnostics (--quiet, --log-level, --debug).",
        "met": false,
        "evidence": [],
        "note": "no --quiet or log-level control"
       },
       {
        "level": 3,
        "id": "structured-diagnostics",
        "text": "Structured logs (e.g. --log-format json) or a machine-readable run summary.",
        "met": false,
        "evidence": [],
        "note": "no structured diagnostics"
       },
       {
        "level": 4,
        "id": "tracing",
        "text": "Tracing hooks (OpenTelemetry).",
        "met": false,
        "evidence": [],
        "note": "no tracing hooks"
       }
      ]
     },
     "library": {
      "level": 0,
      "first_missing": "standard-logger",
      "requirements": [
       {
        "level": 1,
        "id": "standard-logger",
        "text": "Logs through a standard logger namespace and never prints from library code.",
        "met": false,
        "evidence": [],
        "note": "no standard logger"
       },
       {
        "level": 2,
        "id": "log-levels",
        "text": "Log levels are used meaningfully (at least two levels).",
        "met": false,
        "evidence": [],
        "note": "fewer than two log levels used"
       },
       {
        "level": 3,
        "id": "hooks",
        "text": "Optional metrics or tracing hooks.",
        "met": false,
        "evidence": [],
        "note": "no metrics or tracing hooks"
       },
       {
        "level": 4,
        "id": "otel",
        "text": "OpenTelemetry instrumentation available.",
        "met": false,
        "evidence": [],
        "note": "no OpenTelemetry instrumentation"
       }
      ]
     }
    },
    "level_name": "absent",
    "applicable": true
   },
   {
    "key": "legibility",
    "title": "Change legibility",
    "level": 2,
    "rationale": "CI runs the tests; applications pin dependencies (libraries and zero-dependency projects are exempt).",
    "evidence": [
     {
      "signal": "L1 readme-tests",
      "detail": "",
      "path": "README.md",
      "weight": 1
     },
     {
      "signal": "L2 ci-pinned",
      "detail": "",
      "path": ".github/workflows/lock.yaml",
      "weight": 1
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    "metrics": {
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     "source_tokens": 87008,
     "test_files": 48,
     "test_tokens": 56247,
     "test_ratio": 0.65,
     "modules": 4,
     "modules_within_budget": 0.75,
     "oversized_files": [
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     "largest_module": {
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      "tokens": 57046
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     "typed_ratio": 1.0,
     "python_functions": 389,
     "python_annotated": 389,
     "import_edges": 82,
     "import_graph": true,
     "max_fan_out": 10,
     "import_cycles": 1,
     "largest_cycle": [
      "src/flask/json/__init__.py",
      "src/flask/json/provider.py"
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     "languages": {
      "python": 86967,
      "shell": 41
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    },
    "gaps": [
     "L3 At least 90% of modules fit 32k tokens and no file exceeds 12k; test/source token ratio at least 0.3; at least 70% of the code is typed. (75% of modules fit 32k tokens; 1 files over 12k)"
    ],
    "question": "Can an agent change it safely with limited context?",
    "best_surface": "all",
    "surfaces": {
     "all": {
      "level": 2,
      "first_missing": "fits-and-verified",
      "requirements": [
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        "level": 1,
        "id": "readme-tests",
        "text": "A README and some tests.",
        "met": true,
        "evidence": [
         {
          "path": "README.md",
          "detail": ""
         },
         {
          "path": "examples/javascript/tests/conftest.py",
          "detail": "48 test files"
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        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "ci-pinned",
        "text": "CI runs the tests; applications pin dependencies (libraries and zero-dependency projects are exempt).",
        "met": true,
        "evidence": [
         {
          "path": ".github/workflows/lock.yaml",
          "detail": ""
         },
         {
          "path": ".github/workflows/pre-commit.yaml",
          "detail": ""
         },
         {
          "path": ".github/workflows/publish.yaml",
          "detail": ""
         },
         {
          "path": ".github/workflows/tests.yaml",
          "detail": ""
         },
         {
          "path": ".github/workflows/zizmor.yaml",
          "detail": ""
         },
         {
          "path": null,
          "detail": "library or zero-dependency project: lockfile not required"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "fits-and-verified",
        "text": "At least 90% of modules fit 32k tokens and no file exceeds 12k; test/source token ratio at least 0.3; at least 70% of the code is typed.",
        "met": false,
        "evidence": [],
        "note": "75% of modules fit 32k tokens; 1 files over 12k"
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       {
        "level": 4,
        "id": "acyclic-documented",
        "text": "No import cycles, and agent docs (AGENTS.md, CLAUDE.md, llms.txt).",
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        "evidence": [],
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      ]
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}