build-phase

# Build Phase Executor You are executing build phase `$ARGUMENTS` for the SwarmLLM project. ## Setup 1. Read `docs/ARCHITECTURE.md` for current architecture 2. Read `CLAUDE.md` for conventions and build phase descriptions ## Execution Strategy ### Pre-implementation (parallelize with subagents) Before writing code, spawn these in parallel: - **Explore agent** (model: haiku): scan existing `src/` tree, `Cargo.toml` deps, and report what exists - **Code-architect agent** (model: sonnet): design a dependency graph of the files to implement, identifying which can be built in parallel vs which depend on others ### Implementation 1. If `Cargo.toml` needs new dependencies, add them first 2. Implement each file in order. For groups of independent files (no cross-dependencies), you may write them in parallel 3. After every 2-3 files, run `cargo check` to catch errors early ### Subagent model assignment - **Research/exploration** (reading files, scanning codebase): use haiku - **Architecture decisions** (module design, dependency analysis): use sonnet - **Code review** (spec compliance, security): use sonnet - **Running commands** (cargo check, cargo test): use haiku - **Implementation** (writing actual code): do this yourself (opus) ### Post-implementation 1. Run `cargo fmt` to fix formatting 2. Run `cargo clippy --all-targets -- -D warnings` and fix any lints 3. Run `cargo test` and fix any failures 4. Report summary: files created, tests passing, any known issues ## Critica...