## Why
The skill had no instruction to bump the catalog version after ADD, REMOVE, or UPDATE operations. Clients cache the marketplace catalog and use the version field to detect changes — without a bump, the new state is invisible until a forced refresh.
## Implementation Notes
Added a Gotcha explaining the rule and semver convention (ADD/REMOVE → minor, UPDATE → patch). Added a dedicated "Bump catalog version" step to each mutating flow. Updated README to match.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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