Register Dock's shared Claude Code plugin marketplace

[gasher]

Summary

• Registers docknetwork/dock-claude-skills as a plugin marketplace and enables dock-skills@dock for this repo, so anyone opening it here gets the shared marketplace with no manual install step.
• Adds one boilerplate skill (.claude/skills/example-skill/) as a starting point for this repo's own skills — disabled by default, meant to be copied and rewritten, not used as-is.

This is infrastructure setup for the shared skills effort — the marketplace repo itself is still just a scaffold with no skills in it yet.

Test plan

• Open this repo fresh and confirm the dock marketplace registers and dock-skills installs without prompting for credentials
• Confirm no unrelated .claude/settings.json keys were touched (only extraKnownMarketplaces / enabledPlugins were merged in)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.37%. Comparing base (96c79f1) to head (06aebb0).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #579      +/-   ##
==========================================
- Coverage   61.41%   61.37%   -0.05%     
==========================================
  Files         177      177              
  Lines        4932     4932              
  Branches      578      578              
==========================================
- Hits         3029     3027       -2     
- Misses       1830     1831       +1     
- Partials       73       74       +1     

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[Copilot]

Copilot review overview

🟡 Changes recommended

The marketplace repository path is unavailable, preventing fresh-checkout setup until corrected.

Get a fresh assessment by requesting another Copilot review.

Review effort: Lite
Findings: 1

Open (1)

• GitHub marketplace source resolves to 404 · New

What changed in this PR

Registers Dock’s shared Claude Code marketplace and adds a disabled example skill template.

Changes:

• Configures the dock marketplace and enables dock-skills@dock.
• Adds boilerplate guidance for repository-specific skills.

File	Summary
.claude/​skills/​example-skill/​SKILL.md	Adds a disabled skill template.
.claude/​settings.json	Registers and enables the shared marketplace plugin; the configured repository currently returns 404.

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