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feat: JSON Schema support + generator drift detection (LED-713) #2

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Merged
infracore merged 5 commits into from
Apr 7, 2026
Merged

feat: JSON Schema support + generator drift detection (LED-713) #2

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948b5a8
Update README with Think and Build tagline
infracore Mar 31, 2026
6f32e7d
Sync diff engine - null-safety fix from gateway
infracore Apr 3, 2026
e39d384
feat: JSON Schema diff support + generator drift detection (LED-713)
infracore Apr 7, 2026
b072bce
docs: changelog for v1.9.0 (JSON Schema + generator drift)
infracore Apr 7, 2026
1a19928
fix: split JSON Schema header so drift and diff are distinct signals
infracore Apr 7, 2026
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18 changes: 18 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -2,6 +2,24 @@

All notable changes to the Delimit GitHub Action will be documented in this file.

## [1.9.0] - 2026-04-07

### Features
- **JSON Schema support** (LED-713) — first-class governance for bare JSON Schema files (Draft 4+, single-file, internal `$ref` resolution). Complements OpenAPI without changing the existing path. Routes via `core/spec_detector.detect_spec_type()`.
- **Generator drift detection** — new `generator_command` + `generator_artifact` inputs. When set, the action runs the regen command in a sandbox and diffs the regenerated output against the committed artifact. Catches the case where source-of-truth (Zod, protobuf, OpenAPI generator, etc.) has changed but the committed generated file is stale. Workspace is cleanly restored after the check.
- **`fail_on_breaking` input** — boolean alias for `mode=enforce`. When `true`, fails CI on breaking changes regardless of `mode`. Defaults to `false`.
- **PR comment renderer** updated with a JSON Schema branch that shows drift report + classification table.

### v1 JSON Schema change types
Property add/remove, required add/remove, type widen/narrow, enum value add/remove, `const` change, `additionalProperties` flip, `pattern` tighten/loosen, `minLength`/`maxLength`, `minimum`/`maximum`, `items` type. Composition keywords (`anyOf`/`oneOf`/`allOf`), discriminators, external `$ref`, and `if/then/else` deferred past v1.

### Tests
- 41 new unit tests in `tests/test_json_schema_diff.py` covering every v1 change type, $ref resolution at root and nested paths, dispatcher routing, and the agents-oss/agentspec rename as a real-world fixture
- 47 existing OpenAPI tests still passing (no regressions)

### Why
Validating delimit-action against agents-oss/agentspec#21 (issue inviting integration) revealed that the diff engine returned `0 changes` on bare JSON Schema files. The maintainer had explicitly invited a PR. This release closes the gap before that PR opens.

## [1.7.0] - 2026-03-26

### Features
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