Use when creating or fixing .claude/rules/ files - provides correct paths frontmatter (not globs), glob patterns, and avoids Cursor-specific fields like alwaysApply
SkillScore100Maintained
Automatic
◆AI Engineer pack
Last verified 8/14/2026
What it changes
Passed 22 of 22 test cases with the skill, and 16 of 22 without it.
Without skill73%
With skill100%
Checks it passed that the model alone missed
The list items are specified under the paths key
The translated YAML key is paths rather than globs
The rule file omits YAML frontmatter entirely for global scope
and 3 more in the full report
6 fixed16 passed either way0 still failing0 broke
Pass-rate lift
+27 pp
Tokens
+9%
Agent turns
0%
Response time
-47%
Model gemini-3.6-flashMeasured 8/14/2026v122 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 6
Prompt
Generate a rule frontmatter section that targets `packages/core/**/*.ts` and `packages/utils/**/*.ts` as separate list items under the appropriate key.
What was checked, without and with the skill
Checked
Without skill
With skill
The list items are specified under the paths key
Missed
Passed
case-22 · gemini-3.6-flash · 8/14/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md114 linessingle file
Creating Claude Rules
Overview
Rules in .claude/rules/ are modular instructions scoped to specific files via glob patterns. They load automatically with same priority as CLAUDE.md.
When to Use
Creating new rules in .claude/rules/
Fixing rules that use wrong frontmatter (globs instead of paths)