debugging-network-issues

Evidence-driven investigation for network, streaming, and protocol-layer bugs. Use when debugging connection resets, SSE or long-polling stalls, fixed-time connection drops, CDN/proxy/CGNAT idle timeouts, client-side proxy/VPN/TUN misrouting, CNAME-based rule overrides, or any incident where symptoms do not match the obvious cause. Applies falsification-first methodology with layered isolation experiments, env-gated runtime instrumentation, and counter-review agent teams. Cognitive-trap catalog includes reverse-path / directional asymmetry and proxy-node DNS ≠ client DNS.