mytheclipse/.hermes/plans/mytheclipse-round11-spec.md

Implementation Spec: Round 11 — COMPLETE

Goal

Auto thread/core allocation + race hardening (RAII shutdown).

New Features

1. RuntimeConfig (mytheclipse-core, lifecycle)

File: crates/mytheclipse/src/runtime_auto.rs

• RuntimeConfig::auto() / from_cores(n) / compact() infer worker_threads, max_blocking_threads, compute_threads, io_threads from host CPU topology (std::thread::available_parallelism)
• available_parallelism() helper
• build_rayon_pool(cfg) gated on compute feature
• 3 tests

2. ShutdownGuard (mytheclipse-core, lifecycle)

File: crates/mytheclipse/src/shutdown_guard.rs

• RAII guard — runs completion callback exactly once on drop (panic-safe via Mutex<Option<Box>>), prevents double-shutdown race
• new(cb) + finish() (fire now + disarm)
• 3 tests (fires on drop, finish once, panic path)

Files

• new: core/src/runtime_auto.rs, core/src/shutdown_guard.rs
• core/lib.rs: +module+export for both

Build: exit 0. Tests: 0 FAILED. Clippy: 0 new warnings.