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9arm Skills

Skill

A small, opinionated set of engineering skills: a four-step debugging discipline, rigorous post-mortems and code scrutiny.

by thananonCoding & Dev Tools Listed May 20, 2026

Clone or download it from github.com, then drop the folder into ~/.claude/skills/ (Claude Code) or your agent's skills directory.

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About 9arm Skills

Personal skill pack from thananon/9arm-skills, loaded by Claude Code.

  • debug-mantra: reproduce, trace the failure path, falsify the hypothesis, cross-check every clue before fixing
  • post-mortem: writes the engineering record of a fixed bug and refuses without a repro and a validated fix
  • scrutinize for critical review, plus a few productivity skills
  • Installs with npx skills add thananon/9arm-skills

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