Loop canary: document notification smoke path

[hyrule-engineering-loop]

Change class

app_feature

Repos touched

• engineering-loop

Senior role reviews

• network_architect: not approved
• systems_engineer: approved
• devops_netops: approved
• security_auditor: not approved
• finops_integrity: not approved
• virtual_lab_chaos: not approved

Source-of-truth files consulted

• engineering-loop:README.md

Validation gates run

• ['/opt/engineering-loop/.venv/bin/python3', '-c', 'import json\nfrom pathlib import Path\nfor raw in json.loads('["docs/engineering-loop/notification-smoke-path.md"]'):\n path = Path(raw)\n if not path.exists():\n continue\n if not path.is_file():\n raise SystemExit(f'not a file: {raw}')\n path.read_text(encoding='utf-8')\n']: unknown

Expected production impact

none

Rollback plan

Discard the generated feature worktree and branch; no production state was changed.

NOC handoff

• handoff artifact: /var/lib/engineering-loop/runs/issue_engineering_loop_19/handoff/noc_handoff.json
• rollback trigger: operator rejection, failed gates, or failed post-deploy checks
• expected duration: none

Post-deploy checks

• review graph state
• run documented gates

Operator notes

Closes #19

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Correct the documented Icinga check name

The daemon does not submit to loop!engineering-loop: notify_icinga defaults HYRULE_ICINGA_CHECK to noc!engineering-loop, and the existing architecture notes describe the same service. When a NOC operator follows this smoke path without overriding that environment variable, they will inspect or configure the wrong Icinga service and miss whether the daemon heartbeat is actually reporting, so this should either use noc!engineering-loop or explicitly document the required override.

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