{
  "checker": {
    "claims": [
      {
        "claim": "Running the source checkout starts Langflow at its local web address.",
        "command": "",
        "evidence": "make run_cli installed dependencies but its frontend production build was killed by the guest memory limit; the CLI then failed because src/backend/base/langflow/frontend/index.html was not generated",
        "expected": "Langflow starts at http://127.0.0.1:7860.",
        "input": "127.0.0.1:7860",
        "kind": "claim",
        "outcome": "make run_cli installed dependencies but its frontend production build was killed by the guest memory limit; the CLI then failed because src/backend/base/langflow/frontend/index.html was not generated",
        "source": "Langflow starts at http://127.0.0.1:7860.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "blocked"
      }
    ],
    "cycle_checks": [
      {
        "claim": "Scheduled or looping main behavior",
        "command": "",
        "evidence": "README and product entrypoints inspected: Langflow is an interactive workflow builder/server; no built-in product scheduler cycle is exposed for this documented source launch",
        "expected": "identify the product trigger",
        "input": "source inspection",
        "kind": "cycle",
        "outcome": "README and product entrypoints inspected: Langflow is an interactive workflow builder/server; no built-in product scheduler cycle is exposed for this documented source launch",
        "source": "repository entry points",
        "verdict": "yes"
      }
    ],
    "details": {
      "argv": [
        "make",
        "run_cli",
        "host=127.0.0.1",
        "port=7860",
        "open_browser=false"
      ],
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 2,
      "scope": "product operation",
      "stderr": "Checked 561 packages in 655ms\nmake: *** [Makefile.frontend:42: build_frontend] Error 1",
      "stdout": "Installing frontend dependencies\nInstalling backend dependencies\n==== Starting frontend build ====\nCurrent directory: $(pwd)\nChecking if src/frontend exists...\ntotal 940\ndrwxrwxr-x  12 ubuntu ubuntu   4096 Oct 24 14:55 .\ndrwxrwxr-x   8 ubuntu ubuntu   4096 Oct 24 14:35 ..\n-rw-rw-r--   1 ubuntu ubuntu    317 Oct 24 14:35 .achecker.yml\n-rw-rw-r--   1 ubuntu ubuntu    162 Oct 24 14:35 .biomeignore\n-rw-rw-r--   1 ubuntu ubuntu     24 Oct 24 14:35 .dockerignore\ndrwxrwxr-x   2 ubuntu ubuntu   4096 Oct 24 14:35 .dspy_cache\n[excerpt truncated]",
      "working": false
    },
    "evidence_strength": "partly_checked",
    "example_checks": [
      {
        "claim": "Run the source checkout using the documented Make target",
        "command": "make run_cli host=127.0.0.1 port=7860 open_browser=false",
        "deferred": false,
        "evidence": "reStore.ts, dynamic import will not move module into another chunk.\n\n[plugin vite:reporter] \n(!) <guest-path> is dynamically imported by <guest-path> but also statically imported by <guest-path>, dynamic import will not move module into another chunk.\n\ncomputing gzip size...\nKilled\n\nBuild failed! Error output above \u261d\ufe0f\nChecked 561 packages in 1.21s\nmake: *** [Makefile.frontend:42: build_frontend] Error 1",
        "expected": "Starts the application",
        "input": "host=127.0.0.1 port=7860 open_browser=false",
        "kind": "example",
        "outcome": "command exited with code 2",
        "returncode": 2,
        "source": "README.md > Other install options > Run from source",
        "verdict": "no"
      }
    ],
    "status": "PASS"
  },
  "deviations": [
    "Frontend builds were killed during Vite rendering/gzip under guest memory constraints despite increasing Node heap.",
    "Checker replay confirmed make run_cli exits 2 with Killed; app launch and useful API call could not proceed."
  ],
  "fault_owner": "prerequisite",
  "main_blocker": "The guest memory limit kills the frontend production build before index.html is generated.",
  "operation": "make run_cli",
  "operation_scope": "Source checkout install, frontend build, and application launch",
  "outcome": "unverified",
  "plain_failure": "Langflow could not start because the required frontend bundle build is killed by the guest memory limit.",
  "steps": [
    "Installed make, uv 0.13.5, Node.js 22.13.0 and npm 10.9.2.",
    "Installed frontend dependencies with PUPPETEER_SKIP_DOWNLOAD=1 to honor the no-browser-download constraint.",
    "Ran README source command make run_cli host=127.0.0.1 port=7860 open_browser=false."
  ],
  "stuck_step": "Frontend production build in make run_cli",
  "suggested_fix": "Run make run_cli on a guest with enough memory to complete the Vite production build."
}