Summary

• tighten the README top section using the langdag README as a structural reference
• add a clearer why/features/install/quick-start flow for LACP
• remove duplicated intro/install sections and fix stale Obsidian command examples

Validation

• ./bin/lacp test --quick
• ./bin/lacp open-source-check --repo-root . --skip-artifacts --allow-missing-artifacts --json

Notes

• open-source-check still reports the existing skill-audit gate failure, which predates this README-only change