fix(zod): infer parsed tool callback arguments

[HAYDEN-OAI]

• I understand that this repository is auto-generated and my pull request may not be merged

Changes being requested

Fixes #1244.

zodFunction() and zodResponsesFunction() already infer the parsed Zod output for the callback supplied in their options, but their returned auto-parseable tool types recorded the raw Zod schema type as arguments. Because AutoParseableTool and AutoParseableResponseTool use that field for their helper properties, callers saw $callback, $parseRaw, and __arguments typed as the schema object instead of the parsed tool arguments.

This updates both Zod helper return types to use InferZodType<Parameters> for arguments. The change is type-only and does not alter parsing or callback behavior at runtime.

The type regression checks now verify the inferred parsed argument type for $callback, $parseRaw, and __arguments on both chat completion and Responses API tools.

Additional context & links

• Issue: Incorrect type for callback function #1244
• Validation:
  • pnpm test --runInBand tests/helpers/zod.test.ts
  • pnpm lint
  • pnpm test --runInBand

[openai-sdks]

OkTest Summary

✅ 237/237 SDK tests passed in 11.553s for Node SDK PR #1992.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	233ms
tests/chat-completions-create.test.ts	✅ Passed	248ms
tests/chat-completions-stream.test.ts	✅ Passed	139ms
tests/files-content-binary.test.ts	✅ Passed	160ms
tests/files-create-multipart.test.ts	✅ Passed	182ms
tests/files-list-pagination.test.ts	✅ Passed	184ms
tests/initialize-config.test.ts	✅ Passed	175ms
tests/instance-isolation.test.ts	✅ Passed	111ms
tests/models-list.test.ts	✅ Passed	147ms
tests/responses-background-lifecycle.test.ts	✅ Passed	217ms
tests/responses-body-method-errors.test.ts	✅ Passed	434ms
tests/responses-cancel-timeout.test.ts	✅ Passed	367ms
tests/responses-cancel.test.ts	✅ Passed	313ms
tests/responses-compact-retries.test.ts	✅ Passed	270ms
tests/responses-compact.test.ts	✅ Passed	257ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	187ms
tests/responses-create-advanced.test.ts	✅ Passed	264ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.082s
tests/responses-create-errors.test.ts	✅ Passed	284ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	201ms
tests/responses-create-retries.test.ts	✅ Passed	271ms
tests/responses-create-stream-failures.test.ts	✅ Passed	156ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	2.164s
tests/responses-create-stream-wire.test.ts	✅ Passed	2.606s
tests/responses-create-stream.test.ts	✅ Passed	135ms
tests/responses-create-terminal-states.test.ts	✅ Passed	343ms
tests/responses-create-timeout.test.ts	✅ Passed	338ms
tests/responses-create.test.ts	✅ Passed	237ms
tests/responses-delete.test.ts	✅ Passed	201ms
tests/responses-input-items-errors.test.ts	✅ Passed	186ms
tests/responses-input-items-list.test.ts	✅ Passed	212ms
tests/responses-input-items-options.test.ts	✅ Passed	217ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	351ms
tests/responses-input-tokens-count.test.ts	✅ Passed	268ms
tests/responses-malformed-inputs.test.ts	✅ Passed	2.344s
tests/responses-not-found-errors.test.ts	✅ Passed	333ms
tests/responses-parse.test.ts	✅ Passed	292ms
tests/responses-retrieve-retries.test.ts	✅ Passed	218ms
tests/responses-retrieve.test.ts	✅ Passed	285ms
tests/responses-stored-method-errors.test.ts	✅ Passed	613ms
tests/retry-behavior.test.ts	✅ Passed	3.279s
tests/sdk-error-shape.test.ts	✅ Passed	393ms

View OkTest run #29773261057

_{SDK merge (ba4f0805b389) · head (48903fde0a2c) · base (39a15b412fc1) · OkTest (fd7a761c81c1)}

[jbeckwith-oai]

Reviewed the type flow for both Zod tool helpers and the new regression coverage. InferZodType<Parameters> matches the value returned by parseZodObject() and now propagates the parsed output type consistently through $callback, $parseRaw, and __arguments for both Chat Completions and Responses. The compareType assertions are exact, so they would fail if these properties regressed back to the schema object type.

I also validated the PR commit locally with the focused Zod suite (26 tests), pnpm build, and the full pnpm lint pipeline; all passed. No blocking issues found.

[jbeckwith-oai]

Reviewed the current head (48903fd) after its merge with main. The corrected arguments: InferZodType<Parameters> generic now matches the value produced by parseZodObject() and consistently fixes $callback, $parseRaw, and __arguments for both Chat Completions and Responses tools. The exact type assertions cover all six affected surfaces, and the emitted CJS/ESM declarations retain the corrected inferred output type. No runtime behavior changes.

Local validation passed: focused Zod suite (26/26) and the full pnpm lint pipeline (Prettier, ESLint, CJS/ESM+Deno builds, tsc, Are The Types Wrong, publint, JSR dry-run). Current CI is green across Node 20/22/24/26.2, ecosystem tests, Agents SDK regressions, breaking-change detection, examples, and CodeQL. No blocking issues found.