Bump Minimum mthds-agent Version

This skill updates the min_mthds_version across all plugin skills in a single coordinated operation.

Workflow

1. Determine the new version

Ask the user for the target version (semver X.Y.Z) unless they already specified it.

Show the current canonical version by reading line 3 of skills/shared/mthds-agent-guide.md — it contains mthds-agent >= X.Y.Z.

2. Update the canonical source

Edit skills/shared/mthds-agent-guide.md line 3. Replace both occurrences of the old version:

• mthds-agent >= OLD → mthds-agent >= NEW
• below `OLD` → below `NEW`