Engineering essays.
Deep-dives on AI code review, multi-agent architecture, and the craft of shipping reliable software at speed.
July 29, 2026Technical Deep DiveLost-Update on Counter Increment: The UPDATE x SET n = n + 1 Pattern
Real PR catch: read-then-write counter increment — concurrent requests lose increments. Atomic UPDATE fix.
8 min read· Mesrai Team
July 28, 2026Technical Deep DiveReact useState Race Condition in Stale Closures
Real PR catch: setInterval in useEffect with empty deps capturing useState — counter stuck. Functional-update fix.
8 min read· Mesrai Team
July 28, 2026Technical Deep DiveAsync/Await Inside forEach: Why It Skips Errors + How Mesrai Flags
Real PR catch: `items.forEach(async ...)` — outer code does not await, errors disappear. for..of and Promise.all fixes.
8 min read· Mesrai Team
July 27, 2026Technical Deep DiveJavaScript Promise.all + Shared State Mutation: A Caught Bug
Real PR catch: side-effects from inside Promise.all callbacks — non-deterministic order. Return-value fix.
8 min read· Mesrai Team
July 27, 2026Technical Deep DiveGoroutine Leak in a Go HTTP Handler: Live Demo
Real PR catch: `go fetchAndProcess(...)` without context propagation — every cancelled request leaks a goroutine. Context+timeout fix.
8 min read· Mesrai Team
July 26, 2026Technical Deep DiveThe Inventory Race Condition Mesrai Caught Before Black Friday
Real PR catch: read-then-decrement on inventory — TOCTOU oversell under concurrent load. Atomic conditional update fix.
8 min read· Mesrai Team
July 21, 2026Technical Deep DiveRegex Catastrophic Backtracking: The 30s CPU Spike Mesrai Prevented
Real Mesrai catch on a nested-quantifier email regex — pathological input pins the event loop. CWE-1333 walkthrough with linear-time fix.
9 min read· Mesrai Team
June 27, 2026Technical Deep DiveThe Future of AI Code Review: 2026 Predictions from the Frontline
Five predictions for AI code review through 2027 — model trends, BYOK economics, the auto-fix boundary, regulatory pressure, and what stays the same.
8 min read· Mesrai Team
June 26, 2026Technical Deep DiveSelf-Hosted AI Code Review: When the Operational Lift Pays Off
When self-hosted AI code review pays off — data residency, regulated industries, sovereign deployments — and the operational lift to accept first.
8 min read· Mesrai Team
June 26, 2026Technical Deep DiveAI Code Review Across Languages: Which Work Best in 2026
Which programming languages get the best AI code review depth in 2026, where coverage is shallowest, and how Mesrai compares across the matrix.
8 min read· Mesrai Team
June 25, 2026Technical Deep DiveShould Every PR Be Reviewed by AI? When Yes, When No
When AI review should run on every PR and when it shouldn't — risk-based gating that keeps the bar high without burning reviewer attention.
8 min read· Mesrai Team
June 25, 2026Technical Deep DiveAI Code Review Limits: What AI Can Never Do for Your Team
What AI code review cannot do — product judgement, team culture, security tradeoffs — and why the boundary is permanent.
8 min read· Mesrai Team