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fix(antigravity): route models only to accounts whose roster serves them - #7556
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An Antigravity account whose fresh discovered roster omits the requested model is no longer a fallback candidate. Preference, 429 rotation and auth-refusal rotation answer no account instead of reusing it, and the transport replaces an omitting planned account with a usable listing or not-yet-discovered sibling when proactive preference is enabled, or refuses locally with 403 permission_denied before any upstream send. Refs #7500
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 71.43% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 4 files. (1 skipped: … | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely summarizes the main change: Antigravity models are routed only to accounts whose rosters list them. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage
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Explanation
Docstring coverage is 71.43% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 4 files. (1 skipped: 1 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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The roster check ran only on the initial admission, so a 401 recovery or failover rebind that followed a concurrent selection change could still send to an account whose roster omits the model. commitResolvedOAuthSelection now refuses such a candidate, and the initial path answers with the explicit 403 before committing. Refs #7500
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Actionable comments posted: 1
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Inline comments:
Review comments at @src/oauth/generic-account-failover.ts:
- Around line 349-351: Update antigravityModelRefusal so the reroute verdict
returns a distinct message stating that the selected account omits the model,
the replacement account could not be used, and the user should retry. Keep the
existing message for the refuse verdict.
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- Repository: lidge-jun/opencodex
- Branch: sweep/w2-antigravity-roster-routing
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📒 Files selected for processing: 8
docs-site/src/content/docs/guides/providers.mdscripts/test-layout/layout.jsonsrc/oauth/generic-account-failover.tssrc/server/responses/request-transport.tsstructure/providers-and-adapters.mdtests/adapters/google/antigravity-account-roster.test.tstests/fixtures/test-layout-expected.jsontests/server/server-antigravity-model-roster-routing.test.ts
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…nusable With failover on, an omitting account that still resolved means the chosen sibling could not be used. The refusal no longer advises enabling a setting that is already on; it says the replacement could not be used and to retry. Refs #7500
…er the layout.json size cap
Summary
Refs #7500
Before this change, when every Antigravity account's discovered model list omitted the requested model, account selection fell back to the full candidate list. The request then went to an account Google had already shown cannot serve it, and the user saw an upstream 404 ("Requested entity was not found"). Now Antigravity requests reach only accounts that may serve the model, and the proxy refuses locally when none can.
src/oauth/generic-account-failover.ts):preferKiroModelSupportno longer falls back to accounts whose fresh roster omits the model, so it can return an empty list for Antigravity. Proactive preference, 429 rotation,hasEligibleGenericOAuthFailoverTargetandrotateAntigravityAccountOnAuthRefusaltherefore never move a request to such an account. Kiro listings remain a preference only.src/server/responses/request-transport.ts): a newrouteAntigravityModelverdict runs before credential resolution. If the planned account's roster omits the model, the request moves to a usable sibling that may serve it (proactive failover on), or is refused with HTTP 403permission_deniedbefore any upstream send. The shared admission stepcommitResolvedOAuthSelectionalso refuses an omitting candidate, so resolution fallbacks, 401 recovery and failover rebinds after a concurrent selection change abandon the send instead of reaching that account.docs-site/.../guides/providers.mdnow quotes both refusal messages verbatim and states the rule.structure/providers-and-adapters.mddescribes the new contract.Example: with accounts A (active, roster lists only Claude 4.6) and B (lists Claude 5.5), a
claude-opus-5-5request used to go to A, and fail upstream with 404, whenever failover was off or B was cooled. When every account omitted the model, it went to the full candidate list anyway. Now it goes to B whenoauthAccountFailover.enabledis on. Otherwise the proxy answers locally with 403:The selected Google Antigravity account does not list the model "claude-opus-5-5" in its model discovery. Select an account that lists it, or enable oauthAccountFailover so OpenCodex can choose one.The paid-versus-trial display part of #7500 is not addressed here. The maintainer comment on the issue notes there is no reliable upstream signal for it yet, so this PR uses
Refs, notCloses.Decisions
oauthAccountFailover.enabled). This matches the repository's existing rule for Kiro's known-refusal exclusion (refusalAwareInitialKiroAccount) and the commit guard incommitResolvedOAuthSelection, which reverts proactive moves when the flag is off. With the flag off, an omitting selected account produces the "selected account" refusal; the request is never silently moved.permission_error, so the existing classifier yieldspermission_denied. The wording avoids terms that would reclassify the error as auth, quota or subscription.retainModelsdoes not override a roster omission. It keeps catalog rows visible; routing follows the account's own discovery. An exemption would also have required threading config into the 401-rotation call sites inadapter-dispatch.ts, which sits at 1,999 of the 2,000-line ratchet threshold, so the exemption could not be applied consistently.Security summary
This changes OAuth account selection for
google-antigravityonly. No credential, token or OAuth flow code changes, nothing new is logged, and no new data is persisted. The refusal messages contain only the requested model id. They contain no account id, email, project id or token. The change narrows the set of accounts a request can reach: it adds exclusions and a local refusal and never makes an excluded, paused or reauth-flagged account selectable. A reroute uses the existing account-scoped resolver withrequireUsableAccountand the existing guarded selection commit, so the sibling's bearer stays paired with its own project id.Verification
Local, macOS arm64, Bun 1.4.3 test runner (
OCX_TEST_RUNNER_BUN), isolatedHOME/CLAUDE_CONFIG_DIR/OPENCODEX_HOME(mktemp). Typecheck andtest:changedran under the host's shared heavy-test lock.8113db0d1):bun test tests/adapters/google/antigravity-account-roster.test.ts tests/server/server-antigravity-model-roster-routing.test.ts: 19 pass / 0 fail. Red→green verified: against the originalsrc/, every new behavior case and the updated fallback assertion fail; the "keep" cases pass both ways, as intended. The recovery-rebind case fails with only the commit-level check removed.tests/oauth/oauth-account-quota-rank.test.ts,tests/server/server-generic-oauth-affinity.test.ts,tests/oauth/generic-oauth-failover.test.ts,tests/oauth/generic-session-affinity.test.ts,tests/server/server-google-antigravity-oauth-401-replay.test.ts,tests/server/server-google-antigravity-oauth-429-budget.test.ts: 189 pass / 0 fail.bun run test:changedat8113db0d1(merge base516aaaaf8= currentorigin/dev): 33295 pass / 40 skip / 0 fail, 1488 files, exit 0.bun run typecheckat8113db0d1: exit 0.bun run privacy:scanat8113db0d1: passed.bun run structure:checkat8113db0d1: passed.tests/test-layout.test.ts+tests/test-layout-tooling.test.ts: 27 pass (new file registered inscripts/test-layout/layout.jsonandtests/fixtures/test-layout-expected.json).test 2/4on8113db0d1failed only onfile-size ratchet: repository: merged withdev,scripts/test-layout/layout.jsonreached exactly 2000 lines.1745fae7a(maintainer) moves the new test's registration intoscripts/test-layout/layout-agent-assertion.json. On1745fae7amerged withorigin/dev880127dbd, the ratchet, layout, roster-routing and six neighbor files run 492 pass / 1 skip / 0 fail. Those six files are claude-native-passthrough, codex-routing, grok-47-fast-model-wire, responses-self-named-namespace-scrub, loopback-listener-integration and upstream-failure-diagnostics. They failed once in a loaded fulltest:changedrun of the merged tree, and the same files pass on the PR head, on cleandev, and on the merge.ci.ymlwindowsfilter, and no addedsrc//tests/line contains a marker fromscripts/ci/windows-sensitive-diff.sh(count 0), so nolane=alldispatch is required.bun run test(test:changedalready selected 1488 files becauserequest-transport.tsis widely imported; the host lock is shared across several lanes). No GUI changes, so no screenshot orlint:gui/build:gui.Checklist
Review responses
c3fc683b7, which moves the check intocommitResolvedOAuthSelectionand adds a regression test; thread resolved.Summary by CodeRabbit
8113db0d1with a distinct message for the reroute verdict, plus docs and unit assertions; thread resolved.