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 v2.1.269 ·

Plugin/hook execution engine rewritten around async-generator streams

Plugin and hook execution was rewritten to stream results and track per-handler timing and outcomes

TierUnder the hoodhow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaPlugin Hookswhat it touches
KindInternal Changesin v2.1.269,
Under the hood

Plugin and hook execution was rewritten to stream results and track per-handler timing and outcomes

What

The internal system that runs plugin and hook code was rebuilt around async generators (a way of producing a sequence of results piece by piece, or streaming, rather than all at once). The new version:

  • streams results in chunks as they become available
  • tracks per-handler timing, outcome, and chunk counts
  • supports a .catch handler with a grace window for handling failures
  • can chain or hand off execution between different plugin tiers
Why

This is an internal rework of how plugin and hook code runs; the finding does not describe a specific new user-facing capability, but the added timing and outcome tracking suggests better visibility into how hooks and plugins perform and fail.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe practical, user-visible effect of this rewrite (beyond internal timing/outcome tracking) is not specified in the finding.

See this entry in the whole of v2.1.269 →