Of the Cursor rule files we read, the 4,187 first seen in the last six months, against the older ones: the kind of rule that gained most share, and the kind that lost most. About files like this in general, not this one, and an estimate, since a kind is a pattern in the words.

• AGENTS.mdAGENTS.md
• .codex/AGENTS.mdAGENTS.md
• CLAUDE.mdCLAUDE.md
• examples/CLAUDE.mdCLAUDE.md
• .cursor/rules/common-agents.mdCursor rule
• .cursor/rules/common-coding-style.mdCursor rule
• .cursor/rules/common-development-workflow.mdCursor rule
• .cursor/rules/common-hooks.mdCursor rule
• .cursor/rules/common-patterns.mdCursor rule
• .cursor/rules/common-performance.mdCursor rule
• .cursor/rules/common-security.mdCursor rule
• .cursor/rules/common-testing.mdCursor rule
• .cursor/rules/golang-coding-style.mdCursor rule
• .cursor/rules/golang-hooks.mdCursor rule
• .cursor/rules/golang-patterns.mdCursor rule
• .cursor/rules/golang-security.mdCursor rule
• .cursor/rules/golang-testing.mdCursor rule
• .cursor/rules/kotlin-coding-style.mdCursor rule
• .cursor/rules/kotlin-hooks.mdCursor rule
• .cursor/rules/kotlin-patterns.mdCursor rule
• .cursor/rules/kotlin-security.mdCursor rule
• .cursor/rules/kotlin-testing.mdCursor rule
• .cursor/rules/php-coding-style.mdCursor rule
• .cursor/rules/php-hooks.mdCursor rule
• .cursor/rules/php-patterns.mdCursor rule
• .cursor/rules/php-security.mdCursor rule
• .cursor/rules/php-testing.mdCursor rule
• .cursor/rules/python-coding-style.mdCursor rule
• .cursor/rules/python-hooks.mdCursor rule
• .cursor/rules/python-patterns.mdCursor rule
• .cursor/rules/python-security.mdCursor rule
• .cursor/rules/python-testing.mdCursor rule
• .cursor/rules/swift-coding-style.mdCursor rule
• .cursor/rules/swift-hooks.mdCursor rule
• .cursor/rules/swift-patterns.mdCursor rule
• .cursor/rules/swift-security.mdCursor rule
• .cursor/rules/swift-testing.mdCursor rule
• .cursor/rules/typescript-coding-style.mdCursor rule
• .cursor/rules/typescript-hooks.mdCursor rule
• .cursor/rules/typescript-patterns.mdCursor rule
• .cursor/rules/typescript-security.mdCursor rule
• .cursor/rules/typescript-testing.mdCursor rule
• agent-introspection-debuggingSkill
• agent-sortSkill
• api-designSkill
• article-writingSkill
• backend-patternsSkill
• brand-voiceSkill
• bun-runtimeSkill
• claude-apiSkill
• coding-standardsSkill
• content-engineSkill
• crosspostSkill
• deep-researchSkill
• dmux-workflowsSkill
• documentation-lookupSkill
• e2e-testingSkill
• eval-harnessSkill
• everything-claude-code-conventionsSkill
• exa-searchSkill
• The first 60 shown.