Five pure-function modules (types + 4 logic) implemented strict-TDD.
46 passing Jest tests across 4 spec files. Pitfall #8 (boost-cap-at-18)
and Pitfall #9 (no hpCurrent in output) both enforced by spec.
3 documented deviations:
- Rule 3: created apply-attribute-boost.ts dependency (Plan 01-01 work
not yet merged into worktree base; content matches 01-01 spec exactly)
- Rule 1: corrected L5 expected step list (PF2e CRB has class/skill
feats only at even levels; plan said feat-class+feat-skill at L5)
- Rule 1: TS-strict type-guard helpers for EvalResult narrowing
Requirements completed: LVL-02, LVL-06, LVL-09, LVL-10, LVL-01, LVL-13, LVL-14
