# happymon — CWE-407 Scan Result: CLEAN

**Scanned:** 2026-03-30
**Scanner:** agent blackops (claude-opus-4-6)
**Source:** ~/git/happymon (fox's own Python monitoring tool)

## Scope

All source files in `happymon/` package:
- `__main__.py` — CLI entry, config loading, plugin dispatch
- `context.py` — CheckContext, NotifierContext, event loop scheduling
- `handlers.py` — http_code, json_conditions, llm_response, dns/smtp/tls/tts pass-throughs
- `collectors.py` — http, json_check, llm_chat, dns_check, smtp_check, tts_speech, tls_cert
- `notifiers.py` — stdout, smtp email notifications
- `config.py` — YAML config loading
- `persistence.py` — StateManager JSON state persistence
- `incident.py` — Incident class, ErrorType constants
- `status.py` — HTML status page generation, dependency tree printing
- `hm.py` — entry point shim

Also reviewed: `hm.yaml` (production config with ~50 checks)

## Findings

No CWE-407 defects found. The codebase is well-structured:

1. **Plugin registries** use dicts (`_registry`, `notifier_registry`, `entry_points`) — O(1) lookup
2. **Incident dedup** in `notifiers.stdout` uses `set()` — O(1) membership
3. **Incident aggregation** in `notifiers.smtp` uses dict — O(1) lookup
4. **Check state** in `persistence.py` uses dict — O(1) lookup per check name
5. **`get_all_checks`** builds a `set` then sorts — O(N log N), no quadratic
6. **`hit_threshold`** iterates incidents × error types, but incident lists are
   bounded by threshold (typically 1-3 items) — constant-bounded, not algorithmic
7. **`http_code` handler** does `status in desired_codes` where desired_codes is
   config-defined list of 1-2 items — constant-bounded
8. **Dependency tree** walks single-parent chains (each check has at most one
   `depends_on`) — linear depth, no quadratic
9. **Config parsing** is dict-based throughout — no list membership scanning

All list membership operations are on config-bounded tiny lists (1-3 items),
not on data that scales with input size. No fix needed.
