- Agents-overview table: 14 rows renamed to kei-<name>.
- "What you get" table examples: kei-<name> with trailing "...".
- Intro paragraph: note on kei-* namespace motivation (no collision
with user's own same-named agents).
No code/behavior change — this is pure docs alignment with the manifest
rename in commit 3039ada.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>