v6.2.1

v6.2.1 (2026-07-19)

Lower Resident Skill Cost

Mechanical slim of high-frequency skills (gates stay resident; depth on demand):

• writing-skills (~689 → ~243)
• subagent-driven-development (~345 → ~277)
• test-driven-development (~261 → ~175)
• receiving-code-review (~213 → ~151)

Gate test: tests/skills/test-skill-slim-gates.sh

Full notes: see RELEASE-NOTES.md