refactor

<objective> Test-first refactoring. Audit coverage, add characterization tests if missing, apply changes with safety net. NOT for: - bug fixes (use `/develop:fix`) - new features (use `/develop:feature`) - `.claude/` config changes (use `/foundry:manage` (requires foundry plugin)) - non-Python projects (JS/TS/Go/Rust) — toolchain assumes pytest; use language-native toolchain instead - mixed refactor+feature tasks — run /develop:refactor first, then /develop:feature; do not attempt both in single skill run Quality stack (Branch Safety Guard, Codex Pre-pass, Progressive Review) requires `foundry` plugin; when absent, Step 5 quality stack skipped with a visible warning — output lower quality but workflow still completes. </objective> <constants> - MAX_INNER_CYCLES: 5 (change-test cycles per outer session — Step 4 safety break) </constants> <compaction> Key boundary: end of Step 2 — coverage audit complete, before characterization test writing in Step 3. Second boundary: end of Step 4 — refactor edits applied, before review stack in Step 5. Preserve at boundary 1: dev-dir, target path, coverage audit summary, plan-file, --keep items. Preserve at boundary 2: dev-dir, changed files list, test outcomes. </compaction> <workflow> <!-- Agent Resolution: resolved at runtime via $_DEV_SHARED; source at develop/skills/_shared/agent-resolution.md (installed path) --> ## Agent Resolution ```bash _PATHS=$(python "${CLAUDE_PLUGIN_ROOT:-plugins/develop}/bin/dev_shared_resolve.py"...