STET

flux-pr-4567

Zod (TypeScript) · W2 · GPT-5.3 Codex

pass_with_warn

Tests passed. 3/3 commands passed. Strength: strong.

69.2% run pass rate
Tier 1
primary testspassedequivalentfail
pnpm build
gold passagent pass
find . -name vitest.config.ts -exec sed -i 's/test: {/test: { testTimeout: 30000,/' {} +
gold passagent pass
pnpm test -- --maxWorkers 1 --maxConcurrency 1 --retry 2
gold passagent pass

Partial score: 3/3

Publishable: yesCache: miss

Trajectory

unknown · partial order only

Canonical trajectory missing; showing coarse derived order only.

patch written
Patch captured
#1

Stet captured agent.patch for this trial.

validation
Tests passed
#2
equivalence
Equivalence judgment
#3

equivalent

code review
Code review judgment
#4

fail

decision
Final decision
#5

pass_with_warn

Quality

equivalence
equivalent
73% confidence
code review
fail
2 findings
footprint
low (0.28)
behavioral
100.0%
cost
$4.11 · 1.8M

Equivalence Reasoning

stylistic

The agent patch implements the core intent: docs now describe file validation (size + MIME), `z.file()` is no longer documented as unrepresentable, and JSON Schema generation now carries file constraints instead of throwing. Its JSON Schema encoding for files (object with `size`/`type` metadata) differs from the gold patch’s binary-string approach, but it still makes size/MIME rules machine-readable and enforceable.

Code Review

correctness: 1/4introduced bug risk: 2/4edge case handling: 2/4maintainability idioms: 2/4

The patch partially addresses documentation and schema emission for files, but it likely does not satisfy the intended change because it models files as metadata objects instead of preserving file constraints in a binary/file-oriented JSON Schema representation.

2 findings
File JSON Schema emitted in incompatible shape
major

The generator now emits `z.file()` as an object with `name/size/type/lastModified`, but the intended change is to preserve file constraints in JSON Schema for file values themselves (binary/media metadata). This materially changes downstream semantics and can break consumers expecting file/binary schema conventions.

packages/zod/src/v4/core/to-json-schema.ts:434
File bag typing handled via local cast instead of shared core types
major

The generator extracts `minimum/maximum/mime` through an inline structural cast, indicating missing propagation of file internals typing updates. This weakens type safety and increases drift risk across schema/check implementations.

packages/zod/src/v4/core/to-json-schema.ts:436