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fix(copilot): terminate requests on negotiated model scope denial - #7026
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Recheck negotiated routes against admission scope and preserve terminal refusal identity through recovery, continuations and response wrappers. Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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The title clearly and concisely describes the main change: terminating Copilot requests when the negotiated model violates the request key's scope. |
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Docstring coverage is 80.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 7 files. (2 skipped: 2 … |
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Inline comments:
Review comments at @src/server/responses/request-transport.ts:
- Around line 367-370: Capture the request’s admission authorization result
before the negotiation await in resolveCopilotSelection, then use that snapshot
for the routeAllowedByScope check instead of re-resolving scope from mutable
config. Distinguish an intentionally unrestricted key from a missing configured
entry, fail closed for a missing entry, and preserve the captured result through
route renewal and account rotation.
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📒 Files selected for processing (9)
docs-site/src/content/docs/guides/remote-hub.mdsrc/lib/translator-budget.tssrc/server/admission-model-scope.tssrc/server/responses/adapter-continuation.tssrc/server/responses/adapter-dispatch.tssrc/server/responses/core-lifetime.tssrc/server/responses/request-transport.tsstructure/transports/responses.mdtests/providers/github-copilot/github-copilot-auto-runtime.test.ts
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| assertRouteAllowedByScope( | ||
| resolveAdmissionModelScope(config, options.admission), | ||
| copilotRequestedModel, | ||
| { providerName: route.providerName, modelId: selected.modelId }, |
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When a scoped Copilot Auto request is using the web-search or image sidecar and the routed inference gets a 429, this new assertion can throw during the sidecar's key/OAuth rotation; however, executeResponsesSidecars catches every error from resolveCopilotSelection/applyFailoverSnapshot at lines 286-287 and 321-331 and returns null. The sidecar loop therefore returns the original replayable 429, so a combo or policy fallback can still run instead of terminating with model_not_allowed_for_key; handle AdmissionModelDeniedError explicitly at that sidecar boundary and return the non-replayable 403.
AGENTS.md reference: src/AGENTS.md:L17-L19
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| status: 403, | ||
| headers: { "Content-Type": "application/json" }, | ||
| }); | ||
| markResponseNonReplayable(response); |
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When Copilot Auto is a combo target and negotiation denies its concrete model, this marker correctly stops the combo hop, but consumeComboFailure still consumes the response and rebuilds it as error.type = "upstream_error" with the original JSON embedded in the message. Consequently clients cannot branch on the documented stable model_not_allowed_for_key type (the new test only checks for a substring); preserve the local admission response or carry a structured code through combo normalization.
AGENTS.md reference: src/AGENTS.md:L19-L19
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| } | ||
| assertRouteAllowedByScope( | ||
| resolveAdmissionModelScope(config, options.admission), | ||
| copilotRequestedModel, |
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For a request that reaches github-copilot/auto through an alias or policy/combo routing, copilotRequestedModel was captured from the resolved route.modelId rather than the inbound selector captured in request-prepare.ts. If the negotiated model is denied, the 403's model and message therefore name an internal value such as auto instead of the selector the caller sent, exposing routing detail and violating AdmissionModelDeniedError's error-mapping contract; carry the original inbound selector into this assertion.
AGENTS.md reference: src/AGENTS.md:L19-L20
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…mbos Review follow-ups on the negotiated-model scope check: - Check against the scope captured at request admission, so a key edited or removed while negotiation awaits cannot widen the request. - Name the caller's inbound selector in the refusal, not the resolved Auto id. - Web-search and image sidecar rotation answers a denial with the non-replayable 403 instead of the replayable original 429. - A combo child's denial keeps the model_not_allowed_for_key envelope instead of being rewrapped as upstream_error.
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Summary
model_not_allowed_for_keyrefusal across dispatch, OAuth429 recovery, streaming continuation and response-body/account-lease wrappers.Verification
f00eb618c46746478853a3dac89151ccacfbb05aon current dev6da2774369aa32552e318e333902499683d053bc. All nine changed files match reviewed source revision61d5ce2137c1b0ee0f18724929b0b7fe02698791byte for byte.bun test --isolate --parallel=1 --timeout 60000 tests/providers/github-copilot/github-copilot-auto-runtime.test.ts— 68 pass, 0 fail, 930 assertions.bun run typecheck,bun run structure:check,bun run privacy:scan, andgit diff --checkpassed. Privacy scan covers the sparse materialized files, including every changed file.core-lifetime.ts. These changes have distinct purposes; resolve any duplicate imports/marker lines when integrating both.Checklist
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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