On March 31, Anthropic accidentally shipped the entire source code of Claude Code to the public npm registry. A 59.8 MB JavaScript source map (meant for debugging) got bundled into the claude-code npm package. ~512K lines across ~1,900 files, exposed for hours before it was flagged on X and mirrored on GitHub.

The leak quickly turned into a treasure hunt. In the first week of April the community zeroed in on several unreleased, production-grade features hidden behind feature flags.

Plenty of other flags were spotted too — some users counted 44–46 unreleased ones, plus multi-agent swarm orchestration and a remote killswitch.

Sources: tweet

Anthropic launched an AI design tool, and completely mogged Figma—right after Anthropic's CPO left Figma’s board.

Because it sits upstream (AI infra), Anthropic can see what’s working and build competing products—similar to Amazon’s playbook. Figma stock fell ~7%.

Sources: tweet, Claude Design Tutorial

Karpathy shared his approach to organizing knowledge bases for effective vibe coding with AI agents.

Sources: tweet

• Fire-PDFs — a new library from Firecrawl to extract PDFs: tweet
• Claude Code tips: tweet