• Tech Dev NotesTech Dev Notes
Apps
  • Lookup
  • Compare
Market movement
  • Charts
  • Rankings
Visual proof
  • Screens
  • Store listings
  • Icons
Stacks and releases
  • Tech stacks
  • Tool releases
  • Developers
More
  • X feature flags
  • Grokipedia
  • Grok companions
  • Blog
  • Follow on X
Skip to content

© 2026 Tech Dev Notes

RSSAboutAPIPrivacyTermsSitemap@techdevnotes
Claude Code

Anthropic · CLI

Claude Code 2.1.209

2.1.208→2.1.209·July 14, 2026 at 3:58 AM UTC

Patch release: published artifacts can pull live data from connected MCP sources, plus a small subscription-messaging cleanup.

Changelog

  • [new] Published artifacts can declare an mcp capability so the page fetches data live from the user’s connected data sources at runtime, instead of relying only on data already in the conversation. Capability and window.claude.* runtime usage still require loading the related guidance first.
  • [removed] Dropped the model-facing note that users already on the highest Max plan should run /login to switch to API usage billing for extra usage.

Under the hood

  • Added CLAUDE_CODE_ARTIFACT_MCP for the artifact MCP path.
  • SDK compatibility list now includes 0.3.208.
  • Several internal feature gates landed for upcoming experiments (tengu_cloth_snorkel, tengu_doorbell_agave5, tengu_omelette_fouet5).

Upgrade notes

No action required for most users. If you publish artifacts that should read live connector data, declare the mcp capability and follow the artifact runtime guidance before writing window.claude.* calls.

content/

Browse captured content/

Same tree as claude-code/latest/content for this version. Open the full browser for sidebar navigation between docs and other files.

Open content/ browser →

8 listed · 8 in tree

content/ browserNavigate docs, prompts, and root filesFolder index plus per-file pages with prev/next and a full file sidebar.
README.mdDocs2 KBpackage.jsonMetadata1.4 KBmanifest.jsonMetadata1.8 KBversion.jsonMetadata172 Bcli-wrapper.cjsCJS4.9 KBinstall.cjsCJS7 KBsdk-tools.d.tsTS138 KBLICENSE.mdDocs147 B
Older release← 2.1.208Newer release→ 2.1.210
All Claude Code releases →