Fetching from the wire…
01
02
03
04
05
06
07
08
Public story · 2026-09-12 · high
The same release adds a plugin eval command and fixes a permission rule that leaked across Claude Code's settings sources.
Why now: Anthropic dated the release September 11, 2026, one day before this writing.
Claude Code 2.1.269 raises the Workflow tool's per-run agent limit to 256, through a new CLAUDE_CODE_WORKFLOW_MAX_CONCURRENT_AGENTS setting released September 11, per Anthropic's claude-code changelog. For inference-bound fan-outs, that setting turns an undocumented limit into one builders can adjust directly.
The release also ships claude plugin eval, a command that runs a plugin's eval suite against Claude Code. It outputs scored, reproducible JSON and HTML reports, so plugin authors get a scored result instead of a manual spot check.
On the security side, the update fixes a permission bug. A deny or ask rule written with a leading ! was applying beyond the settings source that defined it. Now a ! rule stays scoped to its own source, and a bare ! with nothing after it is ignored and no longer matches everything. The changelog doesn't say how long the scoping bug had been live, or whether any team's negation rules reached further than intended before the fix.
Two prompt-cache fixes round out the release. One handles partial cache invalidation after a response gets cut off by its output-token limit. The other changes how context gets resent when a session resumes after being interrupted mid-thought.
Each link below shares sources, entities, or timing with this story.
Two of the six hid commands from the approval dialog itself, using tab padding, invisible Unicode, and split Bash strings.
The release also adds a command that migrates Python projects off the old anthropic 0.x SDK and stops WebFetch from serving stale content all session.
The update adds a 1M-token context window at $10/$50 per million tokens, plus a way to force one model onto every subagent.
Version 13.24.0's manifest said one thing, its bundled scripts said another, and the mismatch sent the background worker into a kill and respawn loop on every hook event.
Grep and Glob had the same gap, and the release also blocks project settings from logging raw API request bodies.
Fork skills chained to their own output now run before that output exists, unless they opt out.
MindPattern daily
One email a day at 7 AM. Sources and a take on every story. Unsubscribe anytime.