Claude Code workflow (.github/workflows/claude.yml) lost in the v2 tree swap — @claude no longer triggers

[cliffhall]

Same regression class as #1843 (SECURITY.md): the v2 tree swap in #1817 replaced the default branch's tree, and .github/workflows/claude.yml did not exist in the v2 tree, so it was silently removed from main.

Impact

@claude mentions no longer trigger anything, repo-wide — on any PR or issue. issue_comment / pull_request_review_comment / issues events always run workflows from the default branch, so the loss on main disables the integration everywhere, including for PRs targeting v2/main.

Evidence

• The workflow's API state is now deleted:

  gh api repos/modelcontextprotocol/inspector/actions/workflows/173749385 --jq "{name, path, state}"
  # => {"name":"Claude Code","path":".github/workflows/claude.yml","state":"deleted"}

• Its last three runs (all issue_comment, latest 2026-07-28T03:10:05Z) are skipped.
• The last commit carrying the file, ac3c1a12 ("Bump to version 1.0.0", Bump to version 1.0.0 #1720), is not an ancestor of current main.
• .github/workflows/ on main today contains only main.yml.
• Reproduced live: two @claude review comments on fix(core): mirror SEP-2243 x-mcp-header args to Mcp-Param-* on tools/call #1847 (19:08 and 19:10 UTC) produced no bot reply and no workflow run.

The last successful run was on #1825 (run 30315124707), which is where the file content can be recovered from:

gh api "repos/modelcontextprotocol/inspector/contents/.github/workflows/claude.yml?ref=ac3c1a12" --jq .content | base64 -d

Fix

Restore .github/workflows/claude.yml to main verbatim from ac3c1a12 (3592 bytes). The @claude trigger is gated to OWNER / MEMBER / COLLABORATOR author associations, which remains the behavior we want under the issues-only contribution model (#1820).

Worth a look at whether anything else went missing in the same swap — SECURITY.md and this file are two instances of one pattern, and neither was caught by CI.