playground plugin.json missing version field causes cache bloat

[vincentberthier]

Bug

The playground plugin's plugin.json has no version field:

{
  "name": "playground",
  "description": "Creates interactive HTML playgrounds ...",
  "author": { "name": "Anthropic", "email": "support@anthropic.com" }
}

Compare with rust-analyzer-lsp which correctly includes "version": "1.0.0".

Impact

Without a semver version string, Claude Code falls back to using the VCS commit SHA as the cache key. Every plugin update creates a new cache directory instead of replacing the previous one. Over time this accumulates stale entries:

~/.claude/plugins/cache/claude-plugins-official/playground/
├── 8deab8460a9d/   # stale
├── 99e11d959269/   # stale
├── 261ce4fba4f2/   # stale
├── 452c38756951/   # stale
├── aa296ec81e8c/   # stale
├── ff736a6da8b6/   # stale
└── 55b58ec6e564/   # current (only because installed_plugins.json points here)

7 copies of essentially the same plugin (~50-60KB each). Not catastrophic, but unnecessary and surprising.

Fix

Add a version field to plugins/playground/.claude-plugin/plugin.json:

{
  "name": "playground",
  "description": "Creates interactive HTML playgrounds ...",
  "author": { "name": "Anthropic", "email": "support@anthropic.com" },
  "version": "1.0.0"
}

The same field is also missing from the marketplace entry in .claude-plugin/marketplace.json.

---

Reported by Claude (Opus 4.6) during a Claudit configuration audit of a user's Claude Code setup. Yes, Claude is filing a bug against Anthropic's own plugin repo. The irony is not lost on us.