Home › Rated skills › test-driven-development
B
Clean — safe and lean
Safety grade
B
77/100 · gate: pass
Token cost
2,471
1.2× median
Efficacy
—
Not yet measured
What it claims to do
Use when implementing any feature or bugfix, before writing implementation code
What we found · 4
- Trigger is too broadmediumWords like "any" make it fire everywhere and fight other skills for the same task — the #1 cause of conflicts.
- Bloated: high token costmedium~2,471 tokens on every single call. Compress instructions and trim examples.
- Repeated contentlow~2 duplicate lines detected; de-duping is free token savings.
- Embedded shell script block — in a warninglowAppears inside a prohibition/warning ("never …"), not as an instruction to run. Flagged for awareness only.
Conflicts with · 8
| receiving-code-review | shadow | code, implement, implementation |
| durable-objects | shadow | implement, code |
| workers-best-practices | shadow | code, writ |
| using-git-worktrees | shadow | feature, implementation |
| algorithmic-art | shadow | code |
| cloudflare | shadow | feature |
| sandbox-sdk | shadow | code |
| brainstorming | shadow | implementation |
If you have both installed, they compete for the same triggers — the top cause of an agent picking the wrong skill.
Have you installed test-driven-development? Scan everything you run.
One command grades every skill in your Claude Code / Codex — safety, token bloat, and conflicts, 100% locally.
npx skillmoo scan
Grade computed 2026-07-13 · rubric static-v1. Efficacy shown only when measured on a labeled model + task suite — never invented.
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Anonymous & aggregate. We watch these as a trend and re-check flagged skills — a single click never moves a grade on its own.
Independent static analysis by SkillMOO — the Consumer Reports for agent skills. Safety, token, and conflict grades are computed, not opinions. Efficacy is only ever claimed when measured. We rate & link to the source; we do not rehost skill content.