This directory contains the platform-neutral application contract consumed by the Rust core and both UI implementations. The Rust Core is the authoritative implementation for commands covered by the contract; platform adapters supply filesystem, process, terminal, runtime, persistence, and native UI capabilities.

Suitable content includes:

• command IDs, error codes, and data schemas;
• Git, search, Diff, and project fixtures;
• acceptance scenarios and expected results;
• platform-neutral visual tokens or assets.

The current behavioral contract is documented in contracts/application-boundary.md, and the JSON/C ABI commands are listed in contracts/rust-core-api.md. Search and Git golden fixtures live under fixtures.

Editor syntax roles and fallback semantics are defined by contracts/editor-syntax-theme-v1.schema.json. The canonical Lithe palette lives in fixtures/editor-themes/lithe-v1.json; platform renderers map the roles to AppKit or Monaco without sharing rendering implementation.

Update state and preference semantics are defined by contracts/update-v1.md, with the canonical shape in contracts/update-v1.schema.json and the golden sample in fixtures/updates/update-v1.json. Platform installers remain native; their feeds are normalized to this contract by the macOS and Windows adapters.

Do not place UI state, process management, file watching, terminal sessions, installers, or update logic here. The compiled implementation lives under rust/lithe-core; this directory remains the stable contract and fixture source.