AI coding agents are causing quality degradation in code contributions, with users seemingly unaware of the problem they're creating.

AI agent ported MiniJinja (Rust template engine) to Go in ~10 hours with minimal human guidance, requiring only 45 min of active work.

Claude AI autonomously solved Advent of Code 2025 puzzles using a web browser skill, working independently to read prompts and submit solutions.

The author reflects on 2025 as a transformative year, leaving Sentry to start a company and shifting from hands-on coding to AI-assisted programming.

Claude Code's "plan mode" conflicted with "YOLO mode" permissions, so the author developed an alternative iterative workflow using markdown files instead.