MCP release due: 3.21.1

[github-actions]

Summary

An MCP release appears due.

• Proposed version: 3.21.1
• Latest MCP tag: mcp-v3.21.0
• npm latest: 3.21.0
• MCP package version in repo: 3.21.0
• Unreleased MCP-related commits: 1

Unreleased MCP-Related Commits

• f945542 mcp(stdio): restore the CurrentBranchInput narrowing on the eight local-branch tools (mcp(stdio): restore the CurrentBranchInput narrowing on the eight local-branch tools #10257)

Changed Files

• packages/loopover-contract/src/tools/local-branch.ts
• packages/loopover-mcp/bin/loopover-mcp.ts
• test/unit/contract-registry.test.ts
• test/unit/mcp-cli-current-branch-input.test.ts

Release-Prep Checklist

• Bump packages/loopover-mcp/package.json to 3.21.1
• Bump the CLI packageVersion constant to 3.21.1
• Update MCP compatibility metadata minimum supported and latest recommended versions to 3.21.1
• Generate packages/loopover-mcp/CHANGELOG.md with a mcp-v3.21.1 section
• Run npm run build:mcp
• Run npm run test:mcp-pack
• Run npm run changelog:check:mcp
• Run npm run actionlint
• Run npm run test:release:mcp
• Merge the release-prep PR
• Tag mcp-v3.21.1
• Watch npm trusted publishing and the GitHub Release job

[linear-code]

JSO-7153