Sema

Your own Claude Code-grade coding agent — in the terminal.

Quick start

npm install -g @sema-agent/cli

# Point sema at any OpenAI-compatible endpoint you control or pay for:
export OPENAI_BASE_URL=https://your-llm-endpoint/v1
export OPENAI_API_KEY=your-key
export OPENAI_MODEL=your-model-id

sema "fix the failing test in this repo"

No account, no sign-up, no default cloud — the agent runs locally and talks only to the model endpoint you configured.

Sema infers the context window and output-token budget for known model families automatically. If your model id is not recognized, set MODEL_MAX_TOKENS yourself — for reasoning-heavy models use at least 32000, or the whole budget can be consumed by reasoning and the run fails with a max_tokens truncation error.

• sema — interactive REPL (bare prompt argument starts the REPL with that task)
• sema -p "…" — non-interactive print mode for scripts and pipes
• sema update — self-update from the npm registry

Security notes

<system-reminder> tags embedded in user-provided message text are treated as plain data — they carry no system-instruction effect. Genuine system reminders are minted by the engine itself and carry a session-scoped integrity mark.

License

BUSL-1.1 — free for personal, educational, research, and other non-commercial use; commercial production use requires a commercial license. Converts to Apache-2.0 on 2030-07-13.

Claude Code is a product of Anthropic. Sema is an independent project, not affiliated with or endorsed by Anthropic; the name is used only to identify what we compare against.