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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.275 ·

Claude Test plugin subagents get tighter tool restrictions and clearer naming

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The bundled Claude Test plugin's subagents gained explicit names, a stricter tool allowlist, and a clearer error message

TierYou'll noticehow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaPluginswhat it touches
KindImprovementsin v2.1.275,
Group of 2 You'll notice

The bundled Claude Test plugin's subagents gained explicit names, a stricter tool allowlist, and a clearer error message

What

  • The explorer subagent is now explicitly barred from the mcp__plugin_claude-test_browser__claude_test_allow MCP tool, on top of its existing Read/Grep/Glob-only restriction.
  • The author and runner subagent definitions both gained an explicit name field (author and runner respectively) in their frontmatter.
  • The runner's "browser helper not loaded yet" fallback message was replaced with a static, more actionable error that names a likely cause: a duplicate, non-built-in Claude Test plugin.

Why These changes make the plugin's subagents more predictable (the explorer can no longer reach a browser-allow tool it shouldn't need) and easier to identify and debug (explicit names, a clearer failure message) when something goes wrong.

See this entry in the whole of v2.1.275 →