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fix(gemini): bound type-array schema normalization and preserve pointers - #6369
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unevaluatedProperties and unevaluatedItems only see annotations produced inside their own subschema. Moving them into one allOf branch hid properties evaluated by the sibling anyOf, so valid Gemini tool arguments were rejected. Keep both keywords on the node itself.
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📝 WalkthroughWalkthroughThe Devin adapter now represents type-array unions as type-only constraints. It retains shared constraints on the surrounding schema and adds the type constraint to existing ChangesDevin schema normalization
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🔵 Low · up to An uncommon tool schema, one with a null-only type and a non-null enum, could produce an invalid schema that Gemini rejects. A small fix handles it, and the rest of the change looks sound. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change removes schema duplication while preserving constraints and reference locations. No expansion of access or tool permissions was identified. Risk remains low rather than minimal because downstream handling of all changed schema compositions has not been established. Retained concerns Security review detailsSecurity Blast Radius
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Review comments at @src/adapters/devin/cloud-direct/tool-schema.ts:
- Around line 51-53: Update splitTypeArray so an empty set of concrete branches
still produces a single null branch, avoiding an invalid empty anyOf schema.
Preserve the existing allowsNull behavior and branch construction for non-empty
cases.
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src/adapters/devin/cloud-direct/tool-schema.tsstructure/providers-and-adapters.mdtests/providers/devin-chat-wire-fixes.test.ts
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Follow-up verification for Keep a null-only type constraint when sibling enum/const excludes null. The schema remains unsatisfiable and valid, without empty anyOf. Existing pointer locations and resource/unevaluated scopes remain unchanged. The two new enum/const cases failed before the fix. The pure schema group then passed 17 tests with 61 assertions, including pointer, applicator and resource-scope regressions. Executed focused commands:
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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Scoped correctness review at 7b22728: keeping constraints on the original node and appending only the type constraint retains the existing anyOf/allOf pointer positions, avoids recursive branch duplication, and keeps null-only enum/const contradictions valid but unsatisfiable. My isolated Bun 1.4.0 run of tests/providers/devin-chat-wire-fixes.test.ts --test-name-pattern '^Gemini tool schema type arrays' passed 17 tests / 61 assertions, 18 filtered, under CPUQuota=75%, MemoryMax=1536M with fresh homes. No new P0-P2 correctness finding in the reviewed schema transformation; exact-head CI 36842797911 is successful. This is not a new security scan or completion of the independent schema/resource-boundary review requested in the description, and no live Devin/Gemini acceptance is claimed. Approval/sponsorship remains separate from these focused results.
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Maintainer integration record (MAINTAINERS.md, dev-only) — draft by release lane L2
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3 participants
Summary
Gemini tool-schema normalization duplicated surrounding constraints while expanding nested type arrays, allowing the serialized schema to grow far beyond the input. Keep each node's constraints once and express the type alternatives without recursively copying the surrounding schema.
When the node already has
anyOf, preserve it at its original location and append only the new type constraint to the existingallOf. This retains JSON Pointer targets, existingallOfindices, resource identifiers, and the sibling annotations used byunevaluatedPropertiesandunevaluatedItems. Non-Gemini requests remain unchanged.Source history is preserved through commit
45b72a1c50aef5bf3690475ccab456d2e53b9a36, including the pointer-preservation fix211e189dbb699ce1584296adbfa4ff43ed07caed. The local validation below used the integration withdevat0328373fb88fe0d019b29ae278e153d7fed4bcc7.Verification
Current follow-up
Follow-up verification for
7b2272832a506a64edd0c89ce14cd975341f4358:Keep a null-only type constraint when sibling enum/const excludes null. The schema remains unsatisfiable and valid, without empty anyOf. Existing pointer locations and resource/unevaluated scopes remain unchanged.
The two new enum/const cases failed before the fix. The pure schema group then passed 17 tests with 61 assertions, including pointer, applicator and resource-scope regressions.
Executed focused commands:
bun test ./tests/providers/devin-chat-wire-fixes.test.ts --test-name-pattern '^Gemini tool schema type arrays'— passed.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
60d8c0025b5f4843a581339ec1bd07efaaf910f3and the PR HEAD share tree32edbbfae2aafe70a4d71bcee03354b3f5080986. 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 HEAD7399734b2ab3fd70b6d83166b968bedd04dc3e23. The source history through45b72a1c50aef5bf3690475ccab456d2e53b9a36is 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.Windows, Bun 1.4.0, isolated test temporary directory:
bun test tests/providers/devin-chat-wire-fixes.test.ts --test-name-pattern "Gemini tool schema type arrays"— 15 passed, 18 filtered, 0 failed, 55 assertions. Covers nested growth, retained constraints, root and applicator references, existingallOfindices, and unchanged non-Gemini requests.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 repository's focused-validation exception because of concurrent-worktree resource cost. The executed scope is synthetic schema normalization; it does not claim a live Devin/Gemini request. The exact-HEAD CI result is recorded above.Checklist
7b2272832a506a64edd0c89ce14cd975341f4358, 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