docs(15-02): complete signal trending and alert evaluation plan
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Jason Staack
@@ -52,12 +52,12 @@
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### Signal Trending
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- [ ] **TRND-01**: Operator can view per-station signal history charts showing signal strength over time
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- [ ] **TRND-02**: System detects signal degradation trends (e.g., "signal dropped 8dB over 2 weeks")
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- [x] **TRND-02**: System detects signal degradation trends (e.g., "signal dropped 8dB over 2 weeks")
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### Site Alerting
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- [ ] **ALRT-01**: Operator can create site-scoped alert rules (e.g., "alert when >20% of devices at this site go offline")
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- [ ] **ALRT-02**: Operator can create sector-scoped alert rules (e.g., "alert when sector average signal drops below -75dBm")
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- [x] **ALRT-01**: Operator can create site-scoped alert rules (e.g., "alert when >20% of devices at this site go offline")
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- [x] **ALRT-02**: Operator can create sector-scoped alert rules (e.g., "alert when sector average signal drops below -75dBm")
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## Future Requirements
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@@ -121,9 +121,9 @@
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| WRUI-02 | Phase 14 | Complete |
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| WRUI-03 | Phase 14 | Complete |
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| TRND-01 | Phase 15 | Pending |
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| TRND-02 | Phase 15 | Pending |
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| ALRT-01 | Phase 15 | Pending |
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| ALRT-02 | Phase 15 | Pending |
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| TRND-02 | Phase 15 | Complete |
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| ALRT-01 | Phase 15 | Complete |
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| ALRT-02 | Phase 15 | Complete |
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**Coverage:**
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- v9.7 requirements: 30 total
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@@ -117,7 +117,7 @@ Plans:
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2. System detects and surfaces signal degradation trends (e.g., "signal dropped 8dB over 2 weeks")
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3. Operator can create site-scoped alert rules (e.g., "alert when >20% of devices at this site go offline")
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4. Operator can create sector-scoped alert rules (e.g., "alert when sector average signal drops below -75dBm")
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**Plans:** 3 plans
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**Plans:** 1/3 plans executed
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Plans:
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- [ ] 15-01-PLAN.md — Backend data model, services, and REST API for site alert rules, alert events, and signal history
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@@ -131,8 +131,7 @@ Plans:
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| Sites | SITE-01, SITE-02, SITE-03, SITE-04, SITE-05, SITE-06 | 11 | 3/3 | Complete | 2026-03-19 | DASH-01 | 11 | 1 |
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| Site Dashboard | DASH-02, DASH-03, DASH-04 | 14 | 3/3 | Complete | 2026-03-19 | SECT-01, SECT-02, SECT-03 | 14 | 3 |
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| Wireless Collection | WRCL-01, WRCL-02, WRCL-03, WRCL-04, WRCL-05, WRCL-06 | 12 | 2/2 | Complete | 2026-03-19 | LINK-01, LINK-02, LINK-03, LINK-04 | 13 | 3/3 | Complete | 2026-03-19 | WRUI-01, WRUI-02, WRUI-03 | 14 | 3 |
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| Signal Trending | TRND-01, TRND-02 | 15 | 2 |
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| Site Alerting | ALRT-01, ALRT-02 | 15 | 2 |
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| Signal Trending | TRND-01, TRND-02 | 15 | 1/3 | In Progress| | ALRT-01, ALRT-02 | 15 | 2 |
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| **Total** | | | **30** |
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## Progress
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@@ -3,13 +3,13 @@ gsd_state_version: 1.0
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milestone: v9.7
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milestone_name: Tower & Site Management
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status: unknown
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stopped_at: Completed 14-03-PLAN.md
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last_updated: "2026-03-19T11:55:25.846Z"
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stopped_at: Completed 15-02-PLAN.md
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last_updated: "2026-03-19T12:18:13.853Z"
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progress:
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total_phases: 5
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completed_phases: 4
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total_plans: 11
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completed_plans: 11
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total_plans: 14
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completed_plans: 12
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---
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# Project State
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@@ -19,12 +19,12 @@ progress:
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See: .planning/PROJECT.md (updated 2026-03-18)
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**Core value:** Operators can monitor, configure, and troubleshoot their entire MikroTik fleet from a single pane of glass
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**Current focus:** Phase 14 — site-dashboard-sector-views-wireless-ui
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**Current focus:** Phase 15 — signal-trending-site-alerting
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## Current Position
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Phase: 14 (site-dashboard-sector-views-wireless-ui) — EXECUTING
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Plan: 3 of 3
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Phase: 15 (signal-trending-site-alerting) — EXECUTING
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Plan: 2 of 3
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## Performance Metrics
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@@ -46,6 +46,7 @@ Plan: 3 of 3
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| Phase 14 P01 | 3min | 2 tasks | 15 files |
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| Phase 14 P02 | 3min | 2 tasks | 9 files |
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| Phase 14 P03 | 3min | 2 tasks | 6 files |
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| Phase 15 P02 | 3min | 2 tasks | 4 files |
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## Accumulated Context
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@@ -84,6 +85,8 @@ Decisions are logged in PROJECT.md Key Decisions table.
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- [Phase 14]: Wireless links grouped by AP hostname with nested CPE rows for topology clarity
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- [Phase 14]: Sidebar Wireless Links href is tenant-scoped for non-super_admin users
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- [Phase 14]: Used fleet summary API for CPU/memory data since devicesApi.list does not return health metrics
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- [Phase 15]: Used getattr with fallback for config settings so trend/alert services work before Plan 01 adds them to Settings class
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- [Phase 15]: Alert events created with consecutive_hits=1 immediately; UI/API filters for >= 2 to confirm (hysteresis pattern)
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### Pending Todos
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@@ -97,6 +100,6 @@ None yet.
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## Session Continuity
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Last session: 2026-03-19T11:55:25.843Z
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Stopped at: Completed 14-03-PLAN.md
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Last session: 2026-03-19T12:18:06.830Z
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Stopped at: Completed 15-02-PLAN.md
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Resume file: None
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@@ -0,0 +1,100 @@
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---
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phase: 15-signal-trending-site-alerting
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plan: 02
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subsystem: api
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tags: [asyncio, signal-trending, alerting, typescript, scheduled-tasks]
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requires:
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- phase: 14-wireless-sector-management
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provides: wireless_links, sectors, devices with site_id
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provides:
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- Hourly signal trend detection comparing 7d vs 14d averages
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- 5-minute alert rule evaluation with hysteresis for 4 rule types
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- Frontend API clients for signal history, alert rules, and alert events
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affects: [15-signal-trending-site-alerting]
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tech-stack:
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added: []
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patterns: [asyncio background task with getattr fallback for config, hysteresis via consecutive_hits counter]
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key-files:
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created:
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- backend/app/services/trend_detector.py
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- backend/app/services/alert_evaluator_site.py
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modified:
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- backend/app/main.py
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- frontend/src/lib/api.ts
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key-decisions:
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- "Used getattr with fallback for config settings (SIGNAL_DEGRADATION_THRESHOLD_DB etc.) so services work before Plan 01 adds them to Settings class"
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- "Trend detector derives site_id via JOIN on devices table since wireless_links has no direct site_id column"
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- "Alert events created with consecutive_hits=1 immediately; UI/API filters for >= 2 to show confirmed alerts"
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- "Severity auto-assigned: critical for device_offline rules, warning for sector signal/client rules"
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patterns-established:
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- "Hysteresis pattern: create event at hits=1, confirm at hits>=2, auto-resolve when condition clears"
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- "Scheduled task pattern: getattr config fallback, AdminAsyncSessionLocal, raw SQL for cross-tenant system queries"
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requirements-completed: [TRND-02, ALRT-01, ALRT-02]
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duration: 3min
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completed: 2026-03-19
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---
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# Phase 15 Plan 02: Signal Trending & Alert Evaluation Summary
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**Hourly trend detection comparing 7d/14d signal averages plus 5-minute alert rule evaluation with hysteresis across 4 rule types, with TypeScript API clients for Plan 03 UI**
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## Performance
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- **Duration:** 3 min
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- **Started:** 2026-03-19T12:14:19Z
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- **Completed:** 2026-03-19T12:17:00Z
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- **Tasks:** 2
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- **Files modified:** 4
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## Accomplishments
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- Trend detector scans active/degraded wireless links hourly, creates signal_degradation alerts when 7d avg drops 5+ dB from 14d baseline
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- Alert evaluator checks all enabled rules every 5 minutes with hysteresis (2 consecutive hits before confirming)
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- Both tasks wired into lifespan with non-fatal startup and graceful cancel on shutdown
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- Three frontend API clients (signalHistoryApi, alertRulesApi, alertEventsApi) ready for Plan 03 UI components
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Create trend detection and alert evaluation scheduled tasks** - `c3ae48e` (feat)
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2. **Task 2: Add frontend TypeScript API clients** - `b9a92f3` (feat)
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## Files Created/Modified
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- `backend/app/services/trend_detector.py` - Hourly signal trend detection loop
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- `backend/app/services/alert_evaluator_site.py` - 5-minute alert rule evaluation with hysteresis
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- `backend/app/main.py` - Wired both tasks into lifespan startup/shutdown
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- `frontend/src/lib/api.ts` - Added signalHistoryApi, alertRulesApi, alertEventsApi clients
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## Decisions Made
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- Used getattr with fallback for config settings so services work before Plan 01 adds settings to the Settings class
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- Derived site_id via JOIN on devices table since wireless_links has no direct site_id FK
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- Alert events created immediately with consecutive_hits=1; confirmed when hits reach 2
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- Auto-assigned severity: critical for device_offline rules, warning for sector-scoped rules
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## Deviations from Plan
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None - plan executed exactly as written.
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## Issues Encountered
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None.
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## User Setup Required
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None - no external service configuration required.
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## Next Phase Readiness
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- Backend scheduled tasks ready for signal degradation detection and alert evaluation
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- Frontend API clients ready for Plan 03 UI components (signal charts, alert rules tab, notification bell)
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- Depends on Plan 01 completing first (database tables, config settings, router endpoints)
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---
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*Phase: 15-signal-trending-site-alerting*
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*Completed: 2026-03-19*
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