jeff

About jeff

jeff A self-hosted implementation of TypeSafe's jev System One API, powered by GLiFormer (400M parameters). Use the official by pointing at jeff. Supports (pick an option), (rate on ordered levels), and (probability of yes). Cheaper to self-host, but less accurate than jev on reasoning-heavy tasks. See benchmarks. Quickstart · Deploy · Configuration · API · Development Quickstart Requires uv and Python 3.12. Run from the repository root: Serves at . Device selection: CUDA → MPS → CPU. The sync above also installs .

Quick Facts

Compatible Skills

These tools work well together with jeff for enhanced workflows:

• open-alternative-jev — semantic(0.58)+complementary+shared_fw(huggingface)+rare_topics+same_lang+shared_platform (77%)
• jev-agent-skill-router — semantic(0.56)+complementary+rare_topics+same_lang+similar_pop+shared_platform (74%)
• jev-capability-atlas — semantic(0.49)+complementary+rare_topics+same_lang+similar_pop+shared_platform (72%)
• Verdict-open-jev — semantic(0.36)+complementary+shared_fw(huggingface)+same_lang+similar_pop+shared_platform (70%)
• jev-codex-router — semantic(0.42)+complementary+rare_topics+same_lang+similar_pop+shared_platform (69%)

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Frequently Asked Questions