{
  "checker": {
    "claims": [
      {
        "claim": "Database discovery lists schemas in the current database.",
        "command": "./dist/postgres-mcp-go",
        "evidence": "PostgreSQL is not installed; apt-get install postgresql failed because unattended-upgrade held /var/lib/dpkg/lock-frontend (PID 6802); the retry found the lock released but package install command returned without installing PostgreSQL.",
        "expected": "public schema appears in schema list",
        "input": "{}",
        "kind": "claim",
        "outcome": "PostgreSQL is not installed; apt-get install postgresql failed because unattended-upgrade held /var/lib/dpkg/lock-frontend (PID 6802); the retry found the lock released but package install command returned without installing PostgreSQL.",
        "source": "The server starts via stdio, registers all tools with the MCP SDK, and forwards tool calls to the PostgreSQL service layer.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "blocked"
      }
    ],
    "cycle_checks": [
      {
        "claim": "Scheduled or looping main behavior",
        "command": "",
        "evidence": "Repository provides an MCP server that handles client requests on stdio; no scheduler, recurring job, webhook, or cycle trigger is described or implemented.",
        "expected": "identify the product trigger",
        "input": "source inspection",
        "kind": "cycle",
        "outcome": "Repository provides an MCP server that handles client requests on stdio; no scheduler, recurring job, webhook, or cycle trigger is described or implemented.",
        "source": "repository entry points",
        "verdict": "yes"
      }
    ],
    "details": {
      "argv": [
        "./dist/postgres-mcp-go"
      ],
      "blocker": "product reported an operation error: {\"argv\": [\"./dist/postgres-mcp-go\"], \"returncode\": 1, \"stdout\": \"\", \"stderr\": \"{\\\"time\\\":\\\"2026-10-24T04:50:00.499443748Z\\\",\\\"level\\\":\\\"INFO\\\",\\\"msg\\\":\\\"starting MCP PostgreSQL Server (read-only)\\\",\\\"version\\\":\\\"1.0.0\\\",\\\"transport\\\":\\\"stdio\\\",\\\"database\\\":\\\"postgres\\\"}\\n{\\\"time\\\":\\\"2026-10-24T04:50:00.50972986Z\\\",\\\"level\\\":\\\"WARN\\\",\\\"msg\\\":\\\"database ping failed, retrying\\\",\\\"attempt\\\":1,\\\"error\\\":\\\"dial tcp [::1]:5432: connect: connection refused\\\"}\\n{\\\"time\\\":\\\"2026-10-24T04:50:01.517033062Z\\\",\\\"level\\\":\\\"WARN\\\",\\\"msg\\\":\\\"database ping failed, retrying\\\",\\\"attempt\\\":2,\\\"error\\\":\\\"dial tcp [::1]:5432: connect: connection refused\\\"}\\n{\\\"time\\\":\\\"2026-10-24T04:50:03.517434799Z\\\",\\\"level\\\":\\\"ERROR\\\",\\\"msg\\\":\\\"failed to connect to database\\\",\\\"error\\\":\\\"failed to connect to PostgreSQL: dial tcp [::1]:5432: connect: connection refused\\\"}\\n\", \"needs_credentials\": false, \"needs_browser\": false}",
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 1,
      "stderr": "{\"time\":\"2026-10-24T04:50:00.499443748Z\",\"level\":\"INFO\",\"msg\":\"starting MCP PostgreSQL Server (read-only)\",\"version\":\"1.0.0\",\"transport\":\"stdio\",\"database\":\"postgres\"}\n{\"time\":\"2026-10-24T04:50:00.50972986Z\",\"level\":\"WARN\",\"msg\":\"database ping failed, retrying\",\"attempt\":1,\"error\":\"dial tcp [::1]:5432: connect: connection refused\"}\n{\"time\":\"2026-10-24T04:50:01.517033062Z\",\"level\":\"WARN\",\"msg\":\"database ping failed, retrying\",\"attempt\":2,\"error\":\"dial tcp [::1]:5432: connect: connection refused\"}\n{\"time\":\"2026-10-24T04:50:03.517434799Z\",\"level\":\"ERROR\",\"msg\":\"failed to connect to database\",\"error\":\"failed to connect to PostgreSQL: dial tcp [::1]:5432: connect: connection refused\"}",
      "stdout": "",
      "working": false
    },
    "evidence_strength": "nothing_checked",
    "example_checks": [
      {
        "claim": "Build from source",
        "command": "task build",
        "deferred": false,
        "evidence": "task: [build] mkdir -p dist\ntask: [build] go build -trimpath -ldflags \"-s -w -X github.com/vinaycharlie01/postgres-mcp-go/pkg/version.Version=6b91c4f -X github.com/vinaycharlie01/postgres-mcp-go/pkg/version.GitCommit=6b91c4f\" -o dist/postgres-mcp-go ./cmd/server",
        "expected": "dist/postgres-mcp-go executable",
        "input": "task build",
        "kind": "example",
        "outcome": "command completed successfully",
        "returncode": 0,
        "source": "README.md / Build from source",
        "verdict": "yes"
      }
    ],
    "status": "FAIL"
  },
  "deviations": [
    "Go and Task installed to meet README requirements.",
    "PostgreSQL package installation attempted but the apt lock was held by unattended-upgrade; after it released, package install still failed with exit code 100.",
    "Server invocation exited 1 because localhost:5432 refused connection."
  ],
  "fault_owner": "prerequisite",
  "main_blocker": "No running PostgreSQL server; package setup did not complete in this guest.",
  "operation": "Build and run the PostgreSQL MCP server, then call list_schemas",
  "operation_scope": "Pinned source; Go 1.27.0, Task 3.54.0, and documented build succeeded; runtime tool call blocked by absent PostgreSQL service.",
  "outcome": "blocked",
  "plain_failure": "The server builds, but it cannot complete startup without connecting to PostgreSQL. The database package install was blocked by the guest package manager.",
  "steps": [
    "git init; fetch and reset to pinned commit 6b91c4f66e7f3a538aadac27802615f8b8dfb185",
    "go install github.com/go-task/task/v3/cmd/task@latest",
    "task build",
    "copy config.yaml.example and configure database login",
    "attempt PostgreSQL installation for local database operation"
  ],
  "stuck_step": "Call a database-backed MCP tool",
  "suggested_fix": "Install and start PostgreSQL, configure a reachable read-only database in config.yaml, then replay the MCP tool call."
}