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🚀 Enhancements

• Support jitiOptions (e968ad7)

📖 Documentation

• Add genapi to the 'Used Projects' list (#312)

✅ Tests

• Add tests for jitiOptions (c918506)

❤️ Contributors

• Pooya Parsa (@pi0)
• Mao Mr (@hairyf)

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🏡 Chore

• Update deps (fe676ce)
• Bump giget to v3 (3cecdd3)

📦 Build

• Simplify exports field (99cb66f)

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🩹 Fixes

• Bust ESM module cache for native js config imports (#306)
• loader: Use statSync to detect directories with dots in name (#305)

❤️ Contributors

• Terminalchai (@terminalchai)
• Daniel Roe (@danielroe)

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🩹 Fixes

• Disable expandFileReferences by default (#303)

📖 Documentation

• Add migration section (85ba131)

❤️ Contributors

• Pooya Parsa (@pi0)
• Mila (@locksten)

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📦 Package Improvements

c12 install size is now down to 380kB from 3.44MB (20 deps to 7 deps).

Loading TypeScript files is significantly faster (on cold cache) — simple TS config loads ~2.5x faster (bench).

🚀 Migration

• If you need extends feature with remote/git source, install giget as a peer dependency (docs)
• If you are using watchConfig, install chokidar as a peer dependency (docs).
• If you need legacy TypeScript support (mixed ESM/CJS, no import extensions, etc.), install jiti as a peer dependency (c12 automatically falls back) or provide a custom import config (docs).
• Dotenv parsing now uses native runtime features (see #296). You might need to add dotenv as a peer dependency only for legacy/Deno support.

Other changes

🚀 Enhancements

• Support expanding env with _FILE references (#297) (docs)

🔥 Performance

• Optional jiti loader (#295)
• Use native dotenv parser (#296)

📦 Build

• Make chokidar optional peer dependency (8b7c6a2)

🏡 Chore

• Use oxlint and oxfmt (7874678)

❤️ Contributors

• Pooya Parsa (@pi0)
• Volodymyr Stelmashchuk (@VovaStelmashchuk)

See https://github.com/unjs/c12/releases/tag/v4.0.0-beta.2

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📦 Build

• Update chokidar to 5.x (0dcf338)

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📖 Documentation

• Fix typo in globalRc option (#281)

📦 Build

• Switch to obuild (rolldown) (9addbb1)
• Relax magicast peer dependency range (eae6be1)

❤️ Contributors

• Pooya Parsa (@pi0)
• Jan T. Sott (@idleberg)

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🩹 Fixes

• Extend with explicit extensions only (#276)

❤️ Contributors

• Pooya Parsa (@pi0)
• Ígor Jacaúna (@igorjacauna)

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🚀 Enhancements

• Support loading config with array exports (#272)
• Allow extends without extension (#268)

🩹 Fixes

• loadDotenv: cwd is optional (#273)

📖 Documentation

• Improve dotenv section with multiple files example (#270)

❤️ Contributors

• Pooya Parsa (@pi0)
• Carson (@carson2222)
• Igal Klebanov (@igalklebanov)
• @devbro1