Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Plugin runtime capabilities: playing audio and writing files

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Useful3 Signal4
Plugins Notable

Plugins can play audio and write files from hooks, with path guards.

What

Plugins can play audio and can write files and resolve ancestor directories from a hook. Audio playback is refused for anything that is not a loaded plugin, and ancestor path resolution is guarded so a plugin cannot walk outside the project.

Evidence

audio.play: not a loaded plugin

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →