Module executor 

Gate DAG execution — parallel gate runner with cascading failure propagation.

Design: injectable runner

The core execution logic is parameterised over a GateRunner trait so that:

• Production path uses SubprocessRunner which delegates to SubprocessExecutor::spawn (no shell, sanitized env).
• Tests / property tests inject a MockRunner (or any closure) to produce deterministic pass/fail outcomes without spawning real processes.

GateRunner uses BoxFuture (via Pin<Box<dyn Future>>) to remain dyn-compatible without requiring the async_trait crate.

Structs

GateRunOutcome

Per-gate report row suitable for headless --report gates JSON output.

MockRunner

Deterministic gate runner for tests.

SubprocessRunner

Production gate runner that delegates to SubprocessExecutor.

Traits

GateRunner

Abstraction over the mechanism used to actually execute a single gate.

Functions

execute_all

Execute all gates in the DAG, respecting dependency order and concurrency.

execute_single

Execute a single named gate, running its unsatisfied prerequisites first.

is_cache_valid

Return true if the cached content hash still matches the current hash.