acorn

Use when asked to migrate to a feature flag or roll out a manifest-gated acornlib certificate/build-cache or proof-format change. This skill covers feature-flag migrations, including the state-machine workflow for verifier, proof, and cache migrations.

Use when asked to profile Acorn prover or verifier performance, investigate where time is spent, or generate a top-down runtime breakdown from `perf` or `samply`.

Use when a theorem or goal ought to prove but the prover fails in acornlib or an issue repro. Classify whether the failure is a shallow explosion or an interactive timeout/activation-cap case that should reproduce as `--shallow` exhaustion, then narrow it to a local repro and, once approved, turn a single positive `verify_succeeds` case into an mdtest.

Use when a proof/module verifies in baseline mode but reproving under a prover-affecting feature flag fails. Add explicit proof detail based on the working baseline proof until `cargo run --features <feature> -- verify ...` succeeds.