Claude Design links (claude.ai/design/p/...) no longer resolve natively in Claude Code

Summary

Previously, pasting a Claude Design project link (https://claude.ai/design/p/<id>?file=<name>) into Claude Code would resolve the referenced file natively — Claude could read its contents and act on it without any MCP connector or manual setup.

In the current version this no longer works: there is no native tool exposed for claude.ai/design, and WebFetch against those URLs only returns the SPA shell (auth wall), not the file content.

Repro

1. In Claude Code, paste a prompt referencing a Claude Design file, e.g.:

Implement:xxxx.html with a link like https://claude.ai/design/p/<id>?file=<name>.html

1. Claude has no way to read the file's contents.

Expected

Native resolution of claude.ai/design/p/... links (as it worked previously), so the referenced file can be read without a separately installed MCP connector.

Actual

No native tool available; only workaround is to paste the file contents manually.

Environment

• Claude Code on macOS (Darwin 25.3.0)
• Model: Opus 4.7 (1M)