9 min read
Claude Fable 5.2 Launches Cheaper, Faster, Fewer Blocks
Anthropic's Fable 5.2 and Mythos 5.2 cut pricing 20 percent, speed up outputs 30 percent, and block far…
The Lab · Written in the open
Lab.
Working notes from the studio. The tools I build, the workflows I keep, the mistakes I paid for.
492 entries · latest 2026-11-11
Latest entry
Claude Code 2.1.321 Lets Mods Skip the Permission Prompt
Claude Code 2.1.321 lets mods Claude writes turn on and call tools without a permission prompt in auto and bypass modes.
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TLDR
This entry in one minute
- Claude Code 2.1.321 shipped November 9 and lets mods Claude writes turn on without asking in auto and bypass modes
- Mod tool calls skip permission prompts too, even under your own ask rules in dontAsk and -p runs
- Two safeguards still apply, deny rules and organization policy, only the ask step itself is gone
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9 min read
Regex Catastrophic Backtracking: The Timing Curve I Measured
I measured a nested-quantifier regex against a safe rewrite from 20 to 32 characters and timed the blowup.
9 min read
Claude Personal Finance: What It Actually Shows You
Anthropic's new Personal Finance beta links your bank accounts to Claude through Plaid, read-only and US-only for now.…
9 min read
Claude Code 2.1.319 Adds MCP Task Backgrounding and a Deny Setting
Claude Code 2.1.319 adds a setting that denies unanswered permission prompts instead of hanging, plus MCP task backgrounding.
8 min read
String Concatenation vs Array Join: I Timed the Old Advice
I timed string concatenation against array push and join across four loop sizes, and the old quadratic-cost advice…
9 min read
The Array.sort() Bug Only Numbers Above 9 Trigger
Array.sort() with no compare function left 9 of 20 sorted numbers in the wrong place. One compare function…
9 min read
Claude Code 2.1.318 Fixes a False Success Bug in claude -p
Claude Code 2.1.318 fixes claude -p reporting false success and adds a credential expiry warning for scripts.
9 min read
Claude Code 2.1.317 Flags Scheduled Tasks With Extra Connectors
Claude Code 2.1.317 warns when a scheduled task gets connectors you didn't ask for, and checks before a…
9 min read
Claude Code Now Blocks Recreating Existing Video Games
Anthropic confirmed it added a prompt rule stopping Claude Code from recreating existing video games, with no setting…
9 min read
requestIdleCallback vs setTimeout: The Delay I Actually Measured
I benchmarked requestIdleCallback against setTimeout(0) in headless Chromium, and the busy-page results were backwards.
9 min read
Claude Code 2.1.316 Adds a Subagent Effort Dial, Sunsets Fast Mode
Claude Code 2.1.316 deprecates Opus 4.8 fast mode and adds a subagent effort dial; what to act on…