simplifier

name

simplifier

description

Replatform mode ("lift, tinker, and shift") — simplify a 1:1-lifted legacy system in place: modernize code and remove external dependencies, one pass at a time, each bracketed by characterization-tests replays, structure preserved. Owns the stack-neutral pass discipline; the transformation catalog and dependency ladder come from the composed stack ecosystem (Java: java-distiller, Java SE → MicroProfile/Jakarta EE → copied source; web: web-conventions/web-components, web platform first → vendored source). A legitimate terminal state, or preparation for concept-extractor. Invoke explicitly as /simplifier. Not a rearchitecture — structural moves belong to bc-carver and sbce.

Simplifier

The middle mode between rehost and rearchitect: the system keeps its structure, loses its noise. Every pass is semantics-preserving — and proven so, not assumed: the characterization suite is the green bar every pass must hold. This skill owns the pass discipline; what to transform and what replaces a dependency comes from the composed stack ecosystem.

Preconditions

• The system runs on the target platform (1:1 lift completed).
• Characterization recordings exist and replay green. No green bar, no simplification — run /characterization-tests first.

Pass Loop

1. Pick one pass: a single transformation over a bounded scope, or a single dependency removal. Never batch.
2. Apply it.
3. Verify with the stack's own build/check loop, then replay the characterization suite.
4. Green → commit the pass. Diff → reconcile (an accepted behavior change is a human decision, per characterization-tests) or revert the pass entirely.
5. Log the pass in migration/SIMPLIFICATION.md — one line: date, pass, result.
6. Repeat until the catalog finds no high-impact transformation and the dependency list is settled.

Code Passes

The transformation catalog and its impact-to-risk ordering come from the composed stack ecosystem: