Brandon Wie | Software Engineer

Software engineer writing about backend systems, DevOps, and lessons learned building real products.

Work

Arch Calendar — The Calendar That Remembers Everything · Lead Backend

Led backend from legacy to public launch — multi-account calendar sync, payments, and real-time updates processing 10M+ events at scale.

Project Crucio — AISecOps Knowledge Platform · Creator

Zero Trust security for generative AI — 6 polyglot microservices (Python + Go + Rust + TypeScript), Kafka event streaming, hash-chained audit, and full LGTM observability on hybrid GCP + NAS infrastructure.

Recent Posts

May 20, 2026 ↻

AI Code Review Confusion Patterns — Thirteen distinct ways Claude, Copilot, and Codex behave on PRs — ten failure modes plus two productive behaviors to amplify, plus an analyst-side error class. With detection signals and the empirical tiebreaker that resolves factual disagreements.

May 20, 2026 ↻

Claude Code Agent Teams — Experimental feature for orchestrating multiple Claude Code instances as a coordinated team with shared task lists and inter-agent messaging

May 6, 2026 ↻

FastAPI Non-blocking Startup Dependencies — FastAPI lifespan code runs before the application accepts requests. If startup awaits an optional dependency such as Kafka, Cloud Run cold starts can fail health checks and E2E probes even when the API would happily serve routes without it.

May 6, 2026 ↻

Anthropic Prompt Cache TTL + Cost Mechanics — Anthropic silently dropped Claude Code's prompt-cache TTL from 1 hour to 5 minutes around early March 2026. Without explicit awareness, idle gaps ≥5 min between messages evaporate the cache and force a full cold cache-write on the next message — pricing it at 1.25× base input on the entire conversation prefix.

May 6, 2026 ↻

Codex Skill Mirror Pattern — When a repository already treats `.agents/skills/` as the canonical skill source, the clean Codex integration is not "replace it with `.codex/skills/`" or "symlink the whole folder wholesale." A mirror layer with selective adapters preserves the canonical source while giving Codex what it needs.

May 6, 2026 ↻

Two-Phase Invocation as a Manual Merge Gate — When a CI/CD automation skill supports an "all-in-one" mode (`/skill +flag`), the all-in-one mode should be opt-in, not the default. Splitting invocations preserves a meaningful pause point between CI green and the irreversible merge.

May 6, 2026 ↻

`gh pr view` Head-Branch Ambiguity (False-Negative) — Running `gh pr view --json number,state` on a branch with an open PR can return "no pull requests found" even when the PR exists and the branch is correctly tracked. The empty result means "gh's branch resolution didn't find one," not "no PR exists."

May 6, 2026 ↻

`git rev-parse HEAD` vs `git log -1` Divergence Under Watcher Hooks — After a `gh pr merge` and a local pull, `git rev-parse HEAD` returned the correct merge commit while `git log -1` rendered the just-merged-away feature branch tip for several seconds. A graphify watcher rebuild fired during the checkout. The low-level read is authoritative; the log render can lag.

May 6, 2026 ↻

Markdownlint Pre-Commit: MD041 + MD001 Heading Gotchas — Two markdownlint rules that repeatedly block husky pre-commit on newly-created markdown files with YAML frontmatter. Both fire silently, neither is auto-fixed by --fix, and they tend to appear together — fixing one exposes the other.

May 6, 2026 ↻

Serena MCP — Multi-Profile Setup for Claude Code (cpers/cwork) — Installing the Serena MCP server across a Claude Code dual-profile setup (cpers/cwork) plus Codex, including the four recommended hooks, the system-prompt override, and the non-obvious "installer writes to default ~/.claude.json, misses profile-specific stores" trap.

→ See all 137 posts