testing

howells/arc

SkillLoads cleanly

Characterization testing and safety-net backfill for existing code. Use when legacy, under-tested, or risky code needs tests before a refactor, bug fix, or…

Scores
out of 100 · grade B+

2026-08-15

Works

40% of the score

100/100

Loads cleanly: valid frontmatter, required fields present, no dangling references.

Maintained

25% of the score

100/100

no commits in the last 12 weeks

Adopted

20% of the score

20/100

26 stars on the source repo.

Documented

15% of the score

81/100

1,754 words with worked examples.

Loads cleanly. Every structural check Claude Code needs to register this passed. Last commit today.

Install

npx skills add howells/arc/testing

What it says it does

Characterization testing and safety-net backfill for existing code. Use when legacy, under-tested, or risky code needs tests before a refactor, bug fix, or behavior change. Captures current behavior through public interfaces, identifies coverage gaps, and adds focused unit, integration, or E2E tests without replacing TDD implementation workflows.

Every number above came out of reading the file and its repository. Nothing is a judgement call, nothing is a model’s opinion, and nothing can be paid for. The full method is published. Source last committed 2026-08-14.

Also in howells/arc

Other artifacts published from the same repository.
Artifact	What the check found	Type	Reach	Last commit
commithowells/arc	clean	Skill	26 stars	today
releasehowells/arc	clean	Skill	26 stars	today
refactorhowells/arc	clean	Skill	26 stars	today
reviewhowells/arc	Missing files	Skill	26 stars	today
audithowells/arc	Missing files	Skill	26 stars	today
ideatehowells/arc	Missing files	Skill	26 stars	today

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Published by Toolproof, the masthead over this index and eight others. The method behind the number is at toolproof.kynth.studio/methodology, and the whole thing is readable as JSON with no key at /api.