{
 "meta": {
  "name": "nats-io/nats-server",
  "url": "https://github.com/nats-io/nats-server",
  "slug": "nats-io-nats-server",
  "host": "github.com",
  "commit": "64dda80fdd87b41b2afcdc5faf5d846db6c189b0",
  "committed_at": "2026-10-09T12:27:53-04:00",
  "evaluated_at": "2026-10-12T12:03:07+00:00",
  "neosloc": "0.8.0"
 },
 "report": {
  "schema_version": 2,
  "target": "https://github.com/nats-io/nats-server",
  "inventory": {
   "files": 599,
   "source_files": 130,
   "source_tokens": 1147130,
   "languages": {
    "go": 1144588,
    "shell": 2542
   },
   "git": true
  },
  "surfaces": {
   "kinds": [
    "service",
    "cli",
    "library"
   ],
   "evidence": {
    "service": [
     {
      "path": "server/monitor.go",
      "detail": "go-http: 29 route declarations"
     }
    ],
    "cli": [
     {
      "path": "main.go",
      "detail": "go main"
     },
     {
      "path": "server/errors_gen.go",
      "detail": "go main"
     },
     {
      "path": "main.go",
      "detail": "3 matches"
     }
    ],
    "library": [
     {
      "path": "go.mod",
      "detail": "Go module with exported packages"
     }
    ]
   },
   "long_running": [],
   "owns_data": [],
   "uses_credentials": []
  },
  "dimensions": [
   {
    "key": "interface",
    "title": "Interface surface",
    "level": 3,
    "rationale": "[library] The public API is statically typed (py.typed, type declarations, a typed language).",
    "evidence": [
     {
      "signal": "L1 importable",
      "detail": "Go module with exported packages",
      "path": "go.mod",
      "weight": 1
     },
     {
      "signal": "L2 public-api",
      "detail": "exported identifiers",
      "path": "go.mod",
      "weight": 1
     },
     {
      "signal": "L3 typed",
      "detail": "statically typed language",
      "path": "go.mod",
      "weight": 1
     }
    ],
    "metrics": {
     "route_declarations": 29,
     "routes_by_framework": {
      "go-http": 29
     },
     "spec_files": 0,
     "spec_operations": 0,
     "spec_coverage": null
    },
    "gaps": [
     "[service] L2 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). (no machine-readable contract)",
     "[cli] L3 Machine-readable output (--json/--format) and documented exit statuses. (no --json/--format option)",
     "[library] L4 An API reference is generated from the code (autodoc, mkdocstrings, typedoc, \u2026). (no generated API reference)"
    ],
    "question": "Can another program use it through a documented, machine-readable surface?",
    "best_surface": "library",
    "surfaces": {
     "service": {
      "level": 1,
      "first_missing": "contract",
      "requirements": [
       {
        "level": 1,
        "id": "routes",
        "text": "A network surface exists: HTTP routes, an MCP server, or a standard protocol listener.",
        "met": true,
        "evidence": [
         {
          "path": "server/monitor.go",
          "detail": "go-http: 29 route declarations"
         }
        ],
        "note": ""
       },
       {
        "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,
        "evidence": [],
        "note": "no machine-readable contract"
       },
       {
        "level": 3,
        "id": "coverage",
        "text": "A contract covers its transport: an HTTP contract covers at least 80% of declared routes (generated contracts do), or the application layer over a standard protocol (commands, topics, payloads) is specified in a protocol document or AsyncAPI.",
        "met": false,
        "evidence": [],
        "note": "no contract"
       },
       {
        "level": 4,
        "id": "second-surface",
        "text": "A second surface: another transport (HTTP and a protocol, two protocols), an MCP server, a CLI with JSON output, or an SDK.",
        "met": false,
        "evidence": [],
        "note": "only one programmatic surface"
       }
      ]
     },
     "cli": {
      "level": 2,
      "first_missing": "machine-output",
      "requirements": [
       {
        "level": 1,
        "id": "non-interactive",
        "text": "Invocable non-interactively: no prompts, or prompts guarded by a TTY check or a --yes/--no-input option.",
        "met": true,
        "evidence": [
         {
          "path": null,
          "detail": "no interactive prompts"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "help",
        "text": "--help documents every option (at least 90% of options have help text).",
        "met": true,
        "evidence": [
         {
          "path": "main.go",
          "detail": "3 matches"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "machine-output",
        "text": "Machine-readable output (--json/--format) and documented exit statuses.",
        "met": false,
        "evidence": [],
        "note": "no --json/--format option"
       },
       {
        "level": 4,
        "id": "output-schema",
        "text": "The output format is specified by a JSON Schema.",
        "met": false,
        "evidence": [],
        "note": "no JSON Schema for the output"
       }
      ]
     },
     "library": {
      "level": 3,
      "first_missing": "api-reference",
      "requirements": [
       {
        "level": 1,
        "id": "importable",
        "text": "An importable, packaged API exists.",
        "met": true,
        "evidence": [
         {
          "path": "go.mod",
          "detail": "Go module with exported packages"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "public-api",
        "text": "The public API is delimited (__all__, an exports map, exported identifiers).",
        "met": true,
        "evidence": [
         {
          "path": "go.mod",
          "detail": "exported identifiers"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "typed",
        "text": "The public API is statically typed (py.typed, type declarations, a typed language).",
        "met": true,
        "evidence": [
         {
          "path": "go.mod",
          "detail": "statically typed language"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "api-reference",
        "text": "An API reference is generated from the code (autodoc, mkdocstrings, typedoc, \u2026).",
        "met": false,
        "evidence": [],
        "note": "no generated API reference"
       }
      ]
     }
    },
    "level_name": "solid",
    "applicable": true
   },
   {
    "key": "stability",
    "title": "Contract stability",
    "level": 1,
    "rationale": "Releases are versioned (semver tags or versioned changelog sections).",
    "evidence": [
     {
      "signal": "L1 versioned-releases",
      "detail": "312 semver tags, latest v2.15.1",
      "path": null,
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "L2 A changelog exists and marks breaking changes. (the changelog doesn't mark breaking changes)"
    ],
    "question": "Can integrators rely on it not changing under them?",
    "best_surface": "all",
    "surfaces": {
     "all": {
      "level": 1,
      "first_missing": "changelog",
      "requirements": [
       {
        "level": 1,
        "id": "versioned-releases",
        "text": "Releases are versioned (semver tags or versioned changelog sections).",
        "met": true,
        "evidence": [
         {
          "path": null,
          "detail": "312 semver tags, latest v2.15.1"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "changelog",
        "text": "A changelog exists and marks breaking changes.",
        "met": false,
        "evidence": [],
        "note": "the changelog doesn't mark breaking changes"
       },
       {
        "level": 3,
        "id": "deprecation",
        "text": "A deprecation mechanism is used in code (warnings, @deprecated, Deprecation/Sunset headers) or the API is versioned.",
        "met": false,
        "evidence": [],
        "note": "no deprecation mechanism or API versioning"
       },
       {
        "level": 4,
        "id": "clean-history",
        "text": "Across tagged releases, no OpenAPI operation, CLI option or __all__ symbol was removed without first being deprecated.",
        "met": true,
        "evidence": [
         {
          "path": null,
          "detail": "20 tagged releases compared"
         }
        ],
        "note": ""
       }
      ]
     }
    },
    "level_name": "ad hoc",
    "applicable": true
   },
   {
    "key": "events",
    "title": "Events",
    "level": 3,
    "rationale": "Signed webhooks registrable through the API, or two mechanisms (webhooks, streams, a broker).",
    "evidence": [
     {
      "signal": "L1 internal-events",
      "detail": "34 matches",
      "path": "conf/lex.go",
      "weight": 1
     },
     {
      "signal": "L2 outbound",
      "detail": "54 matches",
      "path": "server/websocket.go",
      "weight": 1
     },
     {
      "signal": "L3 robust-delivery",
      "detail": "54 matches",
      "path": "server/websocket.go",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "L4 Events are described by AsyncAPI or CloudEvents. (no AsyncAPI or CloudEvents contract)"
    ],
    "question": "Can others react to state changes without polling?",
    "best_surface": "service",
    "surfaces": {
     "service": {
      "level": 3,
      "first_missing": "event-contract",
      "requirements": [
       {
        "level": 1,
        "id": "internal-events",
        "text": "Internal events exist (signals, queues, an outbox, emitters).",
        "met": true,
        "evidence": [
         {
          "path": "conf/lex.go",
          "detail": "34 matches"
         },
         {
          "path": "server/client.go",
          "detail": "7 matches"
         },
         {
          "path": "server/raft.go",
          "detail": "7 matches"
         },
         {
          "path": "server/mqtt.go",
          "detail": "1 match"
         },
         {
          "path": "server/websocket.go",
          "detail": "1 match"
         },
         {
          "path": "server/websocket.go",
          "detail": "54 matches"
         },
         {
          "path": "server/opts.go",
          "detail": "41 matches"
         },
         {
          "path": "server/server.go",
          "detail": "32 matches"
         },
         {
          "path": "server/client.go",
          "detail": "27 matches"
         },
         {
          "path": "server/leafnode.go",
          "detail": "19 matches"
         },
         {
          "path": "server/auth.go",
          "detail": "15 matches"
         },
         {
          "path": "server/monitor.go",
          "detail": "15 matches"
         },
         {
          "path": "server/reload.go",
          "detail": "13 matches"
         },
         {
          "path": "server/mqtt.go",
          "detail": "4 matches"
         },
         {
          "path": "server/ocsp.go",
          "detail": "3 matches"
         },
         {
          "path": "server/route.go",
          "detail": "3 matches"
         },
         {
          "path": "server/parser.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "outbound",
        "text": "Webhooks sent by this system, or a streaming endpoint (SSE, WebSocket).",
        "met": true,
        "evidence": [
         {
          "path": "server/websocket.go",
          "detail": "54 matches"
         },
         {
          "path": "server/opts.go",
          "detail": "41 matches"
         },
         {
          "path": "server/server.go",
          "detail": "32 matches"
         },
         {
          "path": "server/client.go",
          "detail": "27 matches"
         },
         {
          "path": "server/leafnode.go",
          "detail": "19 matches"
         },
         {
          "path": "server/auth.go",
          "detail": "15 matches"
         },
         {
          "path": "server/monitor.go",
          "detail": "15 matches"
         },
         {
          "path": "server/reload.go",
          "detail": "13 matches"
         },
         {
          "path": "server/mqtt.go",
          "detail": "4 matches"
         },
         {
          "path": "server/ocsp.go",
          "detail": "3 matches"
         },
         {
          "path": "server/route.go",
          "detail": "3 matches"
         },
         {
          "path": "server/parser.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "robust-delivery",
        "text": "Signed webhooks registrable through the API, or two mechanisms (webhooks, streams, a broker).",
        "met": true,
        "evidence": [
         {
          "path": "server/websocket.go",
          "detail": "54 matches"
         },
         {
          "path": "go.mod",
          "detail": "7 matches"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "event-contract",
        "text": "Events are described by AsyncAPI or CloudEvents.",
        "met": false,
        "evidence": [],
        "note": "no AsyncAPI or CloudEvents contract"
       }
      ]
     }
    },
    "level_name": "solid",
    "applicable": true
   },
   {
    "key": "identity",
    "title": "Identity",
    "level": 0,
    "rationale": "Not yet: Programmatic authentication (bearer tokens, API keys).",
    "evidence": [],
    "metrics": {},
    "gaps": [
     "L1 Programmatic authentication (bearer tokens, API keys). (no token auth)"
    ],
    "question": "Can a machine act with its own revocable, least-privilege identity?",
    "best_surface": "service",
    "surfaces": {
     "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"
       },
       {
        "level": 2,
        "id": "managed-credentials",
        "text": "Per-client, revocable credentials (managed API keys, service accounts) or OAuth2.",
        "met": true,
        "evidence": [
         {
          "path": "server/jetstream_cluster.go",
          "detail": "74 matches"
         },
         {
          "path": "server/client.go",
          "detail": "1 match"
         },
         {
          "path": "server/jetstream_api.go",
          "detail": "1 match"
         },
         {
          "path": "server/stream_backup.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "scopes",
        "text": "Credentials carry scopes or permissions.",
        "met": true,
        "evidence": [
         {
          "path": "server/accounts.go",
          "detail": "2 matches"
         },
         {
          "path": "server/certstore/certstore_windows.go",
          "detail": "2 matches"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "federation",
        "text": "Standard provisioning or federation (OIDC client credentials, SCIM).",
        "met": false,
        "evidence": [],
        "note": "no OIDC client credentials or SCIM"
       }
      ]
     }
    },
    "level_name": "absent",
    "applicable": true
   },
   {
    "key": "portability",
    "title": "Data portability",
    "level": null,
    "rationale": "Not applicable: owns no persistent data.",
    "evidence": [],
    "metrics": {},
    "gaps": [],
    "question": "Can its data get in and out, in bulk, in open formats, with an explicit schema?",
    "best_surface": null,
    "surfaces": {},
    "level_name": "n/a",
    "applicable": false
   },
   {
    "key": "ergonomics",
    "title": "Agent ergonomics",
    "level": 2,
    "rationale": "[cli] Data on stdout, diagnostics on stderr, non-zero exit on failure.",
    "evidence": [
     {
      "signal": "L1 never-blocks",
      "detail": "no interactive prompts",
      "path": null,
      "weight": 1
     },
     {
      "signal": "L2 streams-and-status",
      "detail": "24 matches",
      "path": "server/log.go",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "[service] L1 Errors are machine-readable: consistent JSON over HTTP, or a standard protocol's native error replies (RESP errors, MQTT reason codes, gRPC status, SQLSTATE). (no machine-readable errors)",
     "[cli] L3 Documented exit statuses distinguish error classes, errors are JSON in JSON mode, and color is off when not a TTY. (exit statuses aren't documented)",
     "[library] L1 Errors are specific exception types, and library code never calls sys.exit. (no exception classes)"
    ],
    "question": "Can an automated caller use it without guessing, and recover from failure?",
    "best_surface": "cli",
    "surfaces": {
     "service": {
      "level": 0,
      "first_missing": "json-errors",
      "requirements": [
       {
        "level": 1,
        "id": "json-errors",
        "text": "Errors are machine-readable: consistent JSON over HTTP, or a standard protocol's native error replies (RESP errors, MQTT reason codes, gRPC status, SQLSTATE).",
        "met": false,
        "evidence": [],
        "note": "no machine-readable errors"
       },
       {
        "level": 2,
        "id": "validation-pagination",
        "text": "Field-level validation errors, and paginated lists.",
        "met": false,
        "evidence": [],
        "note": "no request validation"
       },
       {
        "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"
       },
       {
        "level": 4,
        "id": "agent-ready",
        "text": "Dry-run or validate-only, conditional requests, and agent docs.",
        "met": false,
        "evidence": [],
        "note": "no dry-run"
       }
      ]
     },
     "cli": {
      "level": 2,
      "first_missing": "typed-failures",
      "requirements": [
       {
        "level": 1,
        "id": "never-blocks",
        "text": "Never blocks on a prompt when stdin is not a TTY.",
        "met": true,
        "evidence": [
         {
          "path": null,
          "detail": "no interactive prompts"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "streams-and-status",
        "text": "Data on stdout, diagnostics on stderr, non-zero exit on failure.",
        "met": true,
        "evidence": [
         {
          "path": "server/log.go",
          "detail": "24 matches"
         },
         {
          "path": "server/opts.go",
          "detail": "5 matches"
         },
         {
          "path": "logger/syslog.go",
          "detail": "4 matches"
         },
         {
          "path": "server/server.go",
          "detail": "4 matches"
         },
         {
          "path": "logger/log.go",
          "detail": "3 matches"
         },
         {
          "path": "server/client.go",
          "detail": "2 matches"
         },
         {
          "path": "main.go",
          "detail": "1 match"
         },
         {
          "path": "server/errors_gen.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/route.go",
          "detail": "1 match"
         },
         {
          "path": "server/filestore.go",
          "detail": "7 matches"
         },
         {
          "path": "server/consumer.go",
          "detail": "3 matches"
         },
         {
          "path": "server/jetstream_cluster.go",
          "detail": "3 matches"
         },
         {
          "path": "server/server.go",
          "detail": "3 matches"
         },
         {
          "path": "server/client_proxyproto.go",
          "detail": "2 matches"
         },
         {
          "path": "conf/fuzz.go",
          "detail": "1 match"
         },
         {
          "path": "server/memstore.go",
          "detail": "1 match"
         },
         {
          "path": "server/mqtt.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/scheduler.go",
          "detail": "1 match"
         },
         {
          "path": "server/store.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 3,
        "id": "typed-failures",
        "text": "Documented exit statuses distinguish error classes, errors are JSON in JSON mode, and color is off when not a TTY.",
        "met": false,
        "evidence": [],
        "note": "exit statuses aren't documented"
       },
       {
        "level": 4,
        "id": "agent-ready",
        "text": "--dry-run, limits for long or costly operations (timeouts, budgets), and agent docs.",
        "met": false,
        "evidence": [],
        "note": "no --dry-run"
       }
      ]
     },
     "library": {
      "level": 0,
      "first_missing": "typed-exceptions",
      "requirements": [
       {
        "level": 1,
        "id": "typed-exceptions",
        "text": "Errors are specific exception types, and library code never calls sys.exit.",
        "met": false,
        "evidence": [],
        "note": "no exception classes"
       },
       {
        "level": 2,
        "id": "validation",
        "text": "Inputs are validated with messages naming the bad argument.",
        "met": false,
        "evidence": [],
        "note": "no input validation errors"
       },
       {
        "level": 3,
        "id": "timeouts-retries",
        "text": "Timeouts and retries are configurable.",
        "met": true,
        "evidence": [
         {
          "path": "scripts/runTestsOnTravis.sh",
          "detail": "16 matches"
         },
         {
          "path": "scripts/cov.sh",
          "detail": "6 matches"
         },
         {
          "path": "server/jetstream_batching.go",
          "detail": "6 matches"
         },
         {
          "path": "server/stream.go",
          "detail": "4 matches"
         },
         {
          "path": "server/jetstream_cluster.go",
          "detail": "3 matches"
         },
         {
          "path": "server/mqtt.go",
          "detail": "3 matches"
         },
         {
          "path": "server/certidp/ocsp_responder.go",
          "detail": "2 matches"
         },
         {
          "path": "server/gateway.go",
          "detail": "2 matches"
         },
         {
          "path": "server/reload.go",
          "detail": "2 matches"
         },
         {
          "path": "server/websocket.go",
          "detail": "2 matches"
         },
         {
          "path": "server/filestore.go",
          "detail": "1 match"
         },
         {
          "path": "server/leafnode.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/signal_windows.go",
          "detail": "1 match"
         },
         {
          "path": "server/stream.go",
          "detail": "10 matches"
         },
         {
          "path": "server/mqtt.go",
          "detail": "3 matches"
         },
         {
          "path": "server/filestore.go",
          "detail": "1 match"
         },
         {
          "path": "server/jetstream_cluster.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/route.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "agent-ready",
        "text": "Agent docs, and examples that run as tests (doctests).",
        "met": false,
        "evidence": [],
        "note": "no agent docs"
       }
      ]
     }
    },
    "level_name": "partial",
    "applicable": true
   },
   {
    "key": "embeddability",
    "title": "Embeddability",
    "level": 3,
    "rationale": "[library] Published to a public registry, with at most 10 runtime dependencies.",
    "evidence": [
     {
      "signal": "L1 importable",
      "detail": "Go module with exported packages",
      "path": "go.mod",
      "weight": 1
     },
     {
      "signal": "L2 installable",
      "detail": "package manifest",
      "path": "go.mod",
      "weight": 1
     },
     {
      "signal": "L3 published-minimal",
      "detail": "3 matches",
      "path": ".github/workflows/release.yaml",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "[service] L1 Runnable from source with documented steps (a README with commands). (no documented run steps)",
     "[cli] L3 Published to a public registry and run non-interactively in CI. (the command isn't run in CI)",
     "[library] L4 Optional features behind extras/features. (no optional extras)"
    ],
    "question": "Can another system run and compose it without a human?",
    "best_surface": "library",
    "surfaces": {
     "service": {
      "level": 0,
      "first_missing": "documented-run",
      "requirements": [
       {
        "level": 1,
        "id": "documented-run",
        "text": "Runnable from source with documented steps (a README with commands).",
        "met": false,
        "evidence": [],
        "note": "no documented run steps"
       },
       {
        "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": false,
        "evidence": [],
        "note": "configuration isn't read from the environment"
       },
       {
        "level": 3,
        "id": "container",
        "text": "A container image.",
        "met": true,
        "evidence": [
         {
          "path": "docker/Dockerfile.nightly",
          "detail": ""
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "composition",
        "text": "Composition artifacts (compose, Helm, IaC).",
        "met": false,
        "evidence": [],
        "note": "no compose/Helm/IaC"
       }
      ]
     },
     "cli": {
      "level": 2,
      "first_missing": "published",
      "requirements": [
       {
        "level": 1,
        "id": "runnable",
        "text": "Runnable from source (a declared entry point).",
        "met": true,
        "evidence": [
         {
          "path": "main.go",
          "detail": "go main"
         },
         {
          "path": "server/errors_gen.go",
          "detail": "go main"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "installable",
        "text": "Installable as a package that provides the command.",
        "met": true,
        "evidence": [
         {
          "path": "main.go",
          "detail": "go main"
         },
         {
          "path": "server/errors_gen.go",
          "detail": "go main"
         }
        ],
        "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": true,
        "evidence": [
         {
          "path": "docker/Dockerfile.nightly",
          "detail": ""
         },
         {
          "path": ".goreleaser.yml",
          "detail": ""
         }
        ],
        "note": ""
       }
      ]
     },
     "library": {
      "level": 3,
      "first_missing": "optional-features",
      "requirements": [
       {
        "level": 1,
        "id": "importable",
        "text": "Importable from source.",
        "met": true,
        "evidence": [
         {
          "path": "go.mod",
          "detail": "Go module with exported packages"
         }
        ],
        "note": ""
       },
       {
        "level": 2,
        "id": "installable",
        "text": "Installable as a package (a package manifest).",
        "met": true,
        "evidence": [
         {
          "path": "go.mod",
          "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/release.yaml",
          "detail": "3 matches"
         },
         {
          "path": null,
          "detail": "unknown number of runtime dependencies"
         }
        ],
        "note": ""
       },
       {
        "level": 4,
        "id": "optional-features",
        "text": "Optional features behind extras/features.",
        "met": false,
        "evidence": [],
        "note": "no optional extras"
       }
      ]
     }
    },
    "level_name": "solid",
    "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": false,
        "evidence": [],
        "note": "extensions must be added inside the package"
       },
       {
        "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",
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    "level": 1,
    "rationale": "[service] A health or readiness endpoint, or a container healthcheck.",
    "evidence": [
     {
      "signal": "L1 health",
      "detail": "1 match",
      "path": "server/server.go",
      "weight": 1
     }
    ],
    "metrics": {},
    "gaps": [
     "[service] L2 Structured logs. (no structured logging)",
     "[cli] L2 Verbosity control for diagnostics (--quiet, --log-level, --debug). (no --quiet or log-level control)",
     "[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": 1,
      "first_missing": "structured-logs",
      "requirements": [
       {
        "level": 1,
        "id": "health",
        "text": "A health or readiness endpoint, or a container healthcheck.",
        "met": true,
        "evidence": [
         {
          "path": "server/server.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "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"
       }
      ]
     },
     "cli": {
      "level": 1,
      "first_missing": "verbosity",
      "requirements": [
       {
        "level": 1,
        "id": "exit-and-stderr",
        "text": "Meaningful exit statuses, and errors on stderr.",
        "met": true,
        "evidence": [
         {
          "path": "server/log.go",
          "detail": "24 matches"
         },
         {
          "path": "server/opts.go",
          "detail": "5 matches"
         },
         {
          "path": "logger/syslog.go",
          "detail": "4 matches"
         },
         {
          "path": "server/server.go",
          "detail": "4 matches"
         },
         {
          "path": "logger/log.go",
          "detail": "3 matches"
         },
         {
          "path": "server/client.go",
          "detail": "2 matches"
         },
         {
          "path": "main.go",
          "detail": "1 match"
         },
         {
          "path": "server/errors_gen.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/route.go",
          "detail": "1 match"
         },
         {
          "path": "server/filestore.go",
          "detail": "7 matches"
         },
         {
          "path": "server/consumer.go",
          "detail": "3 matches"
         },
         {
          "path": "server/jetstream_cluster.go",
          "detail": "3 matches"
         },
         {
          "path": "server/server.go",
          "detail": "3 matches"
         },
         {
          "path": "server/client_proxyproto.go",
          "detail": "2 matches"
         },
         {
          "path": "conf/fuzz.go",
          "detail": "1 match"
         },
         {
          "path": "server/memstore.go",
          "detail": "1 match"
         },
         {
          "path": "server/mqtt.go",
          "detail": "1 match"
         },
         {
          "path": "server/raft.go",
          "detail": "1 match"
         },
         {
          "path": "server/scheduler.go",
          "detail": "1 match"
         },
         {
          "path": "server/store.go",
          "detail": "1 match"
         }
        ],
        "note": ""
       },
       {
        "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"
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      ]
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     "library": {
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      "first_missing": "standard-logger",
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        "id": "standard-logger",
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        "evidence": [],
        "note": "no standard logger"
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       {
        "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": "ad hoc",
    "applicable": true
   },
   {
    "key": "legibility",
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    "rationale": "CI runs the tests; applications pin dependencies (libraries and zero-dependency projects are exempt).",
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     {
      "signal": "L1 readme-tests",
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      "path": "README.md",
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     },
     {
      "signal": "L2 ci-pinned",
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      "path": ".github/workflows/claude.yml",
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    ],
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     "oversized_files": [
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      "server/opts.go",
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      "server/raft.go",
      "server/monitor.go",
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      "server/server.go",
      "server/accounts.go",
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      "server/reload.go",
      "server/jetstream.go",
      "server/memstore.go",
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     "largest_module": {
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    },
    "gaps": [
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    "question": "Can an agent change it safely with limited context?",
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        "evidence": [
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          "path": "README.md",
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          "path": "conf/lex_test.go",
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        ],
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       {
        "level": 2,
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        "met": true,
        "evidence": [
         {
          "path": ".github/workflows/claude.yml",
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         },
         {
          "path": ".github/workflows/cov.yaml",
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         },
         {
          "path": ".github/workflows/long-tests.yaml",
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         },
         {
          "path": ".github/workflows/mqtt-test.yaml",
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         {
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         {
          "path": ".github/workflows/tests.yaml",
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         {
          "path": null,
          "detail": "library or zero-dependency project: lockfile not required"
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        ],
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}