Idiomatic Effect.rs: program structure, HARD rules, and BAD/GOOD patterns for every major construct in the `effect` crate (foundation through testing). Use when writing or refactoring Effect-based Rust, wiring services/layers, schema, streams, STM, or converting async/Result code to Effect.
Use when writing, designing, or reviewing Rust code, or when learning Rust idioms—consult Microsoft RustTraining books in the repo before guessing patterns
Use for Rust build pipelines, cross-compilation, CI/CD, tooling, and validation (Miri, deny)—consult the Rust Engineering Practices book in the submodule
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes
Vault directory and append-only hook JSONL logs under vault/Logs. Use when configuring or debugging session-init, setup-cursor, hooks, or .tool-llm-git-context paths. Always read .cursor/rules/llm-git-context.mdc and run CLI via devenv shell --.