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fix(xai): authorize the Fast wire model across API endpoints - #6373
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📝 WalkthroughWalkthroughThe change checks ChangesGrok 4.7 Fast model-scope authorization
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🔵 Low · up to The authorization change has a bounded documentation issue: operators using an explicit fastWire can configure the wrong model permission and receive 403 responses. Qualify the English guidance and translations; otherwise no material merge-blocking failure is established. Security Architecture ReviewSecurity architecture risk: ⚪ Minimal · up to The change tightens authorization against the actual upstream destination. The reviewed paths preserve caller identity through retries and fallback, with no material security risk found to be introduced or worsened. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 55.56% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 7 files. (11 skipped: 11 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@docs-site/src/content/docs/reference/configuration/providers.md:
- Around line 732-734: Qualify the `allowedModels` guidance for the built-in
OAuth model-variant lane: require `xai/grok-4.7-build-fast` permission only when
no explicit provider `fastWire` is configured; when one is configured, require
permission for its actual destination. Apply the same distinction to each
translated addition.
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📒 Files selected for processing (18)
docs-site/src/content/docs/fr/reference/configuration/providers.mddocs-site/src/content/docs/ja/reference/configuration/providers.mddocs-site/src/content/docs/ko/reference/configuration/providers.mddocs-site/src/content/docs/reference/configuration/providers.mddocs-site/src/content/docs/ru/reference/configuration/providers.mddocs-site/src/content/docs/tr/reference/configuration/providers.mddocs-site/src/content/docs/zh-cn/reference/configuration/providers.mddocs-site/src/content/docs/zh-tw/reference/configuration/providers.mdsrc/providers/xai-fast-model.tssrc/server/chat-completions.tssrc/server/claude-messages.tssrc/server/responses/compact.tssrc/server/responses/core-normalize.tssrc/server/responses/request-prepare.tsstructure/data-planes/inbound-compat.mdstructure/providers/xai-grok.mdstructure/transports/responses.mdtests/providers/xai/grok-47-fast-model-wire.test.ts
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Follow-up verification for Documentation-only follow-up for explicit fastWire permission behavior in English and seven translations. Four required static checks and staged diff/scope checks passed. Existing 108-pass regression evidence reused after unchanged runtime/test/script subtree verification. Local docs build failed with EEXIST; final exact-HEAD documentation CI remains required before Ready. This follow-up changes only eight documentation files. The existing 108-test / 570-assertion behavior evidence is reused after exact source/test subtree preservation; it was not rerun. The local docs build failed while creating a shared Vite cache directory (EEXIST); no successful local docs build is claimed. Hosted documentation CI is checked separately on this HEAD. Required typecheck, structure, privacy and file-size checks passed. Full local suite and unfiltered Cross-platform CI succeeded for this exact HEAD. Checkout Independent maintainer approval, explicit security review and any required sponsorship remain pending before merge. |
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Maintainer integration record (MAINTAINERS.md, dev-only) — draft by release lane L2
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Summary
Grok Fast mode can serialize grok-4.7-build-fast while the logical route names grok-4.7. Authorize the effective wire model against the caller allowlist across Responses, compact, Chat Completions, and Messages. A key that permits only the ordinary model cannot send the Fast model, while a key that explicitly permits the Fast destination remains usable. Shared destination resolution and final wire checks keep endpoint admission consistent, and provider documentation records this behavior.
Source history is preserved through commit
5e08ddecadbbe9494d7a71ba6bb6c87c1bbb274e. The local validation below used the integration withdevat0328373fb88fe0d019b29ae278e153d7fed4bcc7.Verification
Current follow-up
Follow-up verification for
581b963d0d7b17d6ac2b939c27d17ba6e13287b5:Documentation-only follow-up for explicit fastWire permission behavior in English and seven translations. Four required static checks and staged diff/scope checks passed. Existing 108-pass regression evidence reused after unchanged runtime/test/script subtree verification. Local docs build failed with EEXIST; final exact-HEAD documentation CI remains required before Ready.
This follow-up changes only eight documentation files. The existing 108-test / 570-assertion behavior evidence is reused after exact source/test subtree preservation; it was not rerun. The local docs build failed while creating a shared Vite cache directory (EEXIST); no successful local docs build is claimed. Hosted documentation CI is checked separately on this HEAD.
Required typecheck, structure, privacy and file-size checks passed. Full local suite and unfiltered
test:changedwere not run; the documented focused/resource exception and remaining coverage limitations remain in effect. No blocked broad Kiro/SOCKS transport test or real-provider validation is claimed.Cross-platform CI succeeded for this exact HEAD. Checkout
c29a426c355d3e1864ff9ae89491487c84f46f89and the PR HEAD share treea82e712af3729068689fad12ab9a2ea068dbb1c3. Skipped jobs remain skipped.Independent maintainer approval, explicit security review and any required sponsorship remain pending before merge.
Earlier integration evidence
Current upstream integration:
a6114b62ed1b65dede802359ccd373d913979b24; published HEAD359a000b43e8d6c2bff4188969e32e4d2b73dcbe. The source history through5e08ddecadbbe9494d7a71ba6bb6c87c1bbb274eis retained without rewriting authors or commits. The PR-specific change was checked again after this integration; typecheck, structure, privacy and file-size gates passed. Cross-platform CI succeeded for this exact HEAD; its checkout tree matches the published HEAD tree. Skipped jobs remain skipped.The local documentation build did not pass: the candidate and an unchanged dev baseline both failed before content processing with the same Astro/Vite
require is not definederror. No successful local docs build is claimed.Windows, Bun 1.4.0, isolated test temporary directory:
bun test tests/providers/xai/grok-47-fast-model-wire.test.ts tests/providers/xai/xai-transport.test.ts tests/responses/responses-state-snapshot-select.test.ts --timeout 30000: 108 passed, 0 failed, 570 assertions. Synthetic endpoint regressions cover rejected ordinary-only scopes and admitted Fast scopes; no real provider credentials are used.bun node_modules/typescript/bin/tsc --noEmit: passed.bun scripts/structure-ssot.ts: passed.bun scripts/privacy-scan.ts: passed.bun scripts/file-size-ratchet.ts: passed.git diff --cached --check 0328373fb88fe0d019b29ae278e153d7fed4bcc7: passed.The full local suite and
test:changedwere not run under the focused-validation exception because concurrent isolated worktrees made the full suite impractical. The targeted suites use synthetic provider behavior; live xAI traffic was not exercised. Exact-HEAD CI succeeded; results from another HEAD are not its verification.Checklist
581b963d0d7b17d6ac2b939c27d17ba6e13287b5, known correct findings are addressed, and exact-HEAD CI is complete; author review readiness is confirmed.Independent maintainer approval, explicit security review, and any required
maintainer-sponsoreddecision remain pending before merge. These are separate from author review readiness; no approval or sponsorship is claimed.Summary by CodeRabbit
xai/grok-4.7-build-fast(or its provider-prefix-free ID). Standard requests, or requests with Fast disabled, requirexai/grok-4.7. Provider restrictions still apply.