Add Anthropic Claude Sonnet 4.6 support across providers

[PeterDaveHello]

Description

This PR adds support for Claude Sonnet 4.6 across Roo Code providers and UI model-selection flows.

Key changes:

• Added Sonnet 4.6 model metadata in @roo-code/types for:
  • Anthropic (claude-sonnet-4-6)
  • Bedrock (anthropic.claude-sonnet-4-6-20260114-v1:0)
  • Vertex (claude-sonnet-4-6@20260114)
  • OpenRouter (anthropic/claude-sonnet-4.6)
  • Vercel AI Gateway (anthropic/claude-sonnet-4.6)
• Added Sonnet 4.6 handling in providers:
  • Anthropic handler support and 64K output token handling
  • Bedrock 1M context/global inference model lists
  • Vertex 1M context model list
  • OpenRouter fetcher max-token override for Sonnet 4.6
• Updated webview settings/model selection:
  • Anthropic 1M beta messaging now recognizes Sonnet 4.6
  • useSelectedModel applies Sonnet 4.6 1M pricing tier for Anthropic when 1M context is enabled
• Added/updated tests for Anthropic, Bedrock, Vertex, OpenRouter fetcher, and useSelectedModel.
• Added a roo-cline patch changeset for release automation.

Test Procedure

1. Run provider tests:
   • pnpm --filter roo-cline exec vitest run api/providers/__tests__/anthropic.spec.ts api/providers/fetchers/__tests__/openrouter.spec.ts
   • pnpm --filter roo-cline exec vitest run api/providers/__tests__/bedrock.spec.ts api/providers/__tests__/anthropic-vertex.spec.ts
2. Run webview hook test:
   • pnpm --filter @roo-code/vscode-webview exec vitest run src/components/ui/hooks/__tests__/useSelectedModel.spec.ts
3. Run type checks:
   • pnpm --filter @roo-code/types check-types
   • pnpm --filter roo-cline check-types
   • pnpm --filter @roo-code/vscode-webview check-types
4. Pre-push hook check:
   • pnpm run check-types passed in pre-push (14 successful, 14 total).

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

• No documentation updates are required.
• Yes, documentation updates are required. (Please describe what needs to be updated or link to a PR in the docs repository).

Additional Notes

• Bedrock 1M tier pricing display parity in the model-selection hook was not expanded in this PR beyond Sonnet 4.6 Anthropic selection logic.
• The known Bedrock 1M display parity behavior for Opus 4.6 was treated as pre-existing scope and left unchanged.

Start a new Roo Code Cloud session on this branch

[roomote]

Rooviewer   See task

Reviewed the incremental change (deletion of .changeset/soft-carpets-hunt.md). No issues found. The prior review of all 15 changed files remains valid.

Previous reviews

• d650a5d: Review #1

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}

[hannesrudolph]

@roomote do we just need to rerun the failing CI or did we change somethign that would cause it to fail?

[roomote]

Fixaroo   See task

The failing CI (platform-unit-test (windows-latest)) is a transient Windows file-locking issue, not caused by this PR's changes. The error is:

EBUSY: resource busy or locked, copyfile '...\vscode-material-icons\generated\icons\arduino.svg' -> '...\assets\vscode-material-icons\icons\arduino.svg'

This happens during the esbuild bundle step when Windows holds a file lock during concurrent copy operations -- a known flaky behavior on Windows CI runners. None of the files changed in this PR touch the build system or file-copy logic.

Just rerunning the failing CI job should resolve it. No code changes needed.

[anguslees]

Is this bedrock model ID correct?

I think https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html says anthropic.claude-sonnet-4-6

[o-nix]

@anguslees is right, the current Bedrock ID does not work

[PeterDaveHello]

Oops, somehow a wrong ID used here, sorry about that, let me fix it.

[PeterDaveHello]

A PR to fix the wrong ID was sent here: #11569