feat: add three UOW course assignment skills

add project-level CLAUDE.md

refactor(catalog): second round of purification - replace individual bun with official and remove overlaps

feat(catalog): add firecrawl-scrape as the definitive scraping solution

docs: add context7 to skill discovery instructions in global context

chore: fix source attribution for react-19 and tanstack-query

feat(catalog): strictly synchronize manifest with the 50 hardened local skills

feat(catalog): add official better-auth-best-practices

feat(catalog): restore critical infra skills from wshobson

feat(catalog): add impeccable to design-ui profile for advanced visual frontend work

feat: keep all three agents strictly in sync, including claude-md-improver

refactor: remove OpenCode support and consolidate to three agents (Codex, Claude, Gemini)

feat: add using-superpowers from obra to complete the suite

refactor: remove amp support and replace agent-automation-recommender with claude-automation-recommender

docs(find-skills): clarify skillsbench alignment