Engineering essays.
Deep-dives on AI code review, multi-agent architecture, and the craft of shipping reliable software at speed.
July 30, 2026Technical Deep DiveCache Stampede on Cold Boot: A Mesrai-Caught Architectural Smell
Real PR catch: cache-or-load path that lets every concurrent miss run the query. Single-flight + jitter fix.
8 min read· Mesrai Team
July 29, 2026Technical Deep DiveDouble-Submit Form Race: Mesrai's Idempotency-Key Suggestion
Real PR catch: payment endpoint without idempotency — double-clicks cause double charges. Stripe idempotency-key + DB upsert fix.
8 min read· Mesrai Team
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