paseru/sinew

Sinew is a desktop AI coding harness you can actually reshape. Every tool is toggleable, every description is editable, every provider is pluggable, and the agent only sees the surface area you keep.

tauri 2 · react · rust · monaco · xterm · mcp

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[!NOTE] OAuth providers — a quick heads-up, then chill ✌️

Sinew can sign you in to Codex, Claude Code and Antigravity through their native OAuth flow, so you can plug Sinew into the subscription you already pay for instead of double-paying through an API key.

• Codex (OpenAI) — fully in-bounds. The Codex CLI is open-source (Apache 2.0) and its OAuth flow is part of the publicly supported tooling, so third-party clients using it sit on solid ground.
• Claude Code (Anthropic) and Antigravity (Google) — the same OAuth flow is technically reserved for their own first-party clients. So in theory, those providers could flag accounts using it through a third-party harness.

In practice: no ban has ever been reported to us, and this is the exact same approach every other open-source coding agent out there uses (opencode, crush, and friends). We track the upstream clients closely and ship updates fast whenever the flow shifts — so what Sinew sends keeps looking like a normal first-party session and stays clear of any flagging heuristics.

Want to stay 100% sanctioned? Every provider also works with a plain API key or through OpenRouter — both fully in-bounds usages. Pick the path that feels right. Use at your own risk, but honestly: stay chill.

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Contents

• The three modes — Act, Goal, Plan
• AGENTS.md & DESIGN.md — system prompt injection