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decomposer: generate deliverable files for Define the service contract and project architecture for the FastAPI endpoint monitoring service.; Implement the typed monitor CRUD API and concurrency-safe in-memory state according to the service design.; Implement secure on-demand endpoint checks with status updates, latency measurement, robust error handling, and redacted structured logs.; Add operational API endpoints and environment-driven runtime configuration to the monitoring service.; Create automated tests for the monitoring service.; Package the service with Docker and developer documentation.; Validate the complete project.
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2026-08-09 15:57:58 +00:00
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VERIFICATION.md
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# Verification report # Verification report
## Commands ## Artifact inspection
The repository defines these reproducible checks: This repository contains the service contract, implementation, tests, dependency
metadata, container packaging, and documentation in directly inspectable paths. The
checker tests use `httpx.MockTransport`; they do not make external network requests.
```sh ## Execution status for this generation
pip install -e '.[dev]'
The generation platform exposed repository scaffolding/commit and file-inspection
operations, but no command runner or Docker daemon. Therefore the following commands
were **not executed here**, and no passing result is claimed:
```bash
ruff format --check .
ruff check . ruff check .
mypy app mypy app
pytest -q pytest
docker build -t endpoint-monitor:local . docker build -t endpoint-monitor .
docker run --rm -p 8000:8000 endpoint-monitor:local docker run --rm -d -p 8000:8000 --name endpoint-monitor endpoint-monitor
curl -fsS http://127.0.0.1:8000/health curl --fail http://127.0.0.1:8000/health/live
curl -fsS http://127.0.0.1:8000/ready curl --fail http://127.0.0.1:8000/health/ready
docker rm -f endpoint-monitor
``` ```
Generation occurred through the repository scaffold platform. No claim is made here that a local Python environment, Docker daemon, container startup, or smoke test was available during generation; commands not actually run must not be represented as passing. The source and deterministic mocked tests are committed for platform/CI execution. They are the required validator sequence. A validator with a Python 3.12 environment
and Docker should execute them and record stdout, versions, and image digest. Static
review confirms each required artifact is present, but it is not a substitute for
execution.
## Inspectable requirement evidence ## Known operational limitations
* bounded total/connect/read timeout and error mapping: `app/checker.py`, `test_total_timeout_is_mapped_without_leaking_exception` State is memory-only and disappears on process exit. The lock coordinates coroutines
* every redirect re-enters resolution/policy before fetch: `EndpointChecker.check`, `test_redirect_hop_is_resolved_and_blocked_before_second_fetch` inside one process only. The container intentionally starts one worker; multiple
* all DNS answers classified and mixed answers rejected: `app/security.py`, parametrized and mixed-answer security tests workers or replicas do not share monitors. DNS is checked on each redirect hop, while
* rebinding defense: validated addresses flow into `PinnedResolver` and a fresh per-hop `TCPConnector`; the pin/host rejection is tested network egress policy remains necessary to close DNS-rebinding/TOCTOU risk fully. No
* atomic status update: revision snapshot plus locked `set_status_if_current`; stale/concurrent tests authentication, scheduler, persistence, or cross-process readiness dependency is in
* latency and stable, non-exception error messages: `EndpointChecker.check` and timeout test scope.
* query/userinfo/fragment redaction: `redact_url`, `JsonFormatter`, and log test
## Limitation
Storage is process-local and volatile. One worker is mandatory; restart loses data and replicas do not coordinate. Docker is configured accordingly.