🚀 Circuit Breaker Native Build STABLE — v0.2.3 Testing Underway!

TL;DR: After days of relentless stability firefighting, the *native PyInstaller build is finally making REAL progress. 684 lint errors, async/sync deadlocks, event loop hangs, and resource leaks all fixed. Advanced scanning + Proxmox one-click tomorrow.

🎉 What We Fixed (High-Level)

The native dev server used to freeze after 3-5 minutes:

• Ctrl+C ignored
• /health timeouts
• WS storms (CLOSE_WAIT ×30)
• t=300s Proxmox poll pileups

Root causes squashed:

✅ Event loop blockers (sync SQLAlchemy in async def → run_in_executor)
✅ Scheduler shutdown deadlocks (APScheduler.shutdown → thread pool)  
✅ DB pool exhaustion (30s hangs → pool_timeout=5)
✅ Lifespan leaks (uncancelled tasks/subs → tracked + cancelled)
✅ Telemetry bloat (unbounded tables → indexes + 30-day purge)
✅ Dev workflow (docker-compose.deps + stress tests)

Numbers:

684 lint + type errors → 0
23 ESLint warnings → 0
Stress test: 100 concurrent reqs + 10 WS tabs → ✅
Native dev → 60+ min stable (was 3min max)

🔬 Tech Deep Dive (for the curious)

The killer bug chain:

1. --reload → file save → lifespan shutdown
2. scheduler.shutdown(wait=True) → sync blocks event loop
3. asyncio.wait_for(..., timeout=10) → never fires (loop frozen)
4. WS reconnect storm → 30 CLOSE_WAIT → Redis 50ms polls → total starvation

Systemic fix:

Ruff ASYNC rules + mypy strict
pool_timeout=5 everywhere
Lifespan: tasks.append(asyncio.create_task(...)) → cancel on shutdown
Proxmox jobs: async with asyncio.timeout(270):
ThreadPoolExecutor(max_workers=32)

Full postmortem: BACKEND_STABILITY_REMEDIATION.md

🚀 What This Unlocks

Native build = game changer:

• ✅ No Docker hacks for ARP/raw sockets (deeper LAN scanning)
• ✅ PyInstaller one-liner (curl ... | bash)
• ✅ RPi/VM/NAS native (arm64/amd64)
• ✅ Zero deps beyond Postgres (optional)

Tomorrow:

v0.2.3 → v0.3.0-beta
├── 🏗️ Deeper LAN scanning (multi-interface ARP/ICMP)
├── 🔌 Proxmox one-click (cluster/VM/storage import)
├── 📱 Rack simulator v2 (U-aware, cable mgmt)
└── 🧪 Stress-tested (100 concurrent + WS storm)

🎯 Join the Beta

curl -fsSL https://raw.githubusercontent.com/BlkLeg/circuitbreaker/main/install.sh | bash

Test it, break it, tell us:

• Native hangs?
• Proxmox import issues?
• Scanning false positives?

🙏 Thanks

• AI agents ate 700+ bugs in 24hrs
• Community stress-tested the fixes
• You — for sticking through the fires

Native Circuit Breaker is here. Let’s ship v1.0.

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Shawnji — Circuit Breaker Maintainer