Fetching from the wire…
OSS2026-09-23 · source-backed
v18.2.11 on September 23 fixes Opus 5.5 ignoring a mid-session switch to high effort when the session started without an explicit effort setting, corrects Sol and Luna cost estimation, and stops background job completions bumping foreground Bash calls into the background. That issue-to-star ratio is the highest on the TypeScript trending board, which points at heavy real use rather than casual starring.
Each link below shares sources, entities, or timing with this story.
Anthropic released Claude Fable 5.1 on September 1. Claude Code v2.1.257 made it the default Fable model at 17:53 UTC that day, with a 1M-token context window, $10 per million input tokens, $50 per million output, and $0.25 per million on cache reads (claude-code CHANGELOG). B...
v2.1.218 took dangerous-rm, background-&, and suspicious-Windows-path checks out of permission dialogs, and stopped prompting in plan mode for Bash the static analyzer can't prove read-only. /deep-research also now starts only when you invoke it. Fewer interrupts, but a model...
The release carries three security fixes mid-list: Bash commands looping over or assigning certain special shell variables now ask permission instead of running unprompted, worktree-isolated sessions refuse Bash commands with certain nested shell expansions, and MCP connection...
Everyone posted benchmark tables yesterday. One person replayed real merged commits. paddo.dev took six production changes from a TypeScript monorepo of about 3,700 files, changes that had already been written, reviewed and merged by humans, and ran both models at them 20 time...
CometixCode, created September 20 at 230 stars within the day, AGPL-3.0 and unaffiliated with Anthropic, describes itself as a 1:1 Rust reimplementation porting the TypeScript React/Ink UI into iocraft, following the original file by file with TypeScript components mapped to R...
v2.1.270, September 12 at 19:45Z, ships one change: read-only git commands in Bash stopped honoring their allow rules and started prompting mid-session, a regression attributed to 2.1.269, the release carrying the two permission-rule escape fixes and the world-readable plugin...
MindPattern daily
One email a day at 7 AM. Sources and a take on every story. Unsubscribe anytime.