Replace placeholder XP level math with content-backed thresholds validated in CI and at server boot, and update docs/manual QA/review artifacts to reflect NEO-39 delivery and follow-up fixes.
- Hybrid progression: encounter gig XP, mission skill rewards, Slice 3 split - SkillDef JSON Schema: stable id, gather/process/make/tech, allowedXpSourceKinds - Prototype skills: salvage, refine, intrusion; expand E2.M1/E2.M2 contracts - Add docs-review-agent rule, skills coherence review, AGENTS.md row - gigs/progression/overview/skills cross-links; explicit HTML anchors in skills.md