Add JSON contract and snapshot matching#278
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json_schema validates against an authored schema and jsonpath extracts, but nothing matched two JSON payloads with relaxed rules or diffed them path-by-path for contract/snapshot tests. Add match_json (partial, match_type, ignore), diff_json (path-tagged missing/extra/changed), normalize_json and golden-master snapshot. Composes with json_schema and json_patch. Wired through the facade, AC_match_json/AC_diff_json executor commands, MCP tools and the Script Builder.
Up to standards ✅🟢 Issues
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| Metric | Results |
|---|---|
| Complexity | 57 |
| Duplication | 0 |
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Summary
json_schemavalidates a value against an authored schema andjsonpathextracts values, but nothing matched two JSON payloads with relaxed rules or diffed them path-by-path for contract / snapshot tests. This adds that layer (composes withjson_schema+json_patch).match_json(actual, expected, *, ignore, match_type, partial)→MatchReport(ok, mismatches); each mismatch is{path, kind}(missing/extra/changed).partial= subset match,match_type= Pact-stylelike(types must match),ignore= skip volatile paths.diff_json(actual, expected)— raw path-tagged diff.normalize_json(value, *, drop)— canonical copy (sorted keys, dropped keys).snapshot(actual, path)— golden-master (write-if-absent, else compare).truestays distinct from1. Pure stdlib (json), deterministic.Five-layer wiring
je_auto_control/utils/json_contract/__init__.py+__all__AC_match_json,AC_diff_jsonac_match_json,ac_diff_jsonTests & docs
test/unit_test/headless/test_json_contract_batch.py(14 tests: changed/missing/extra, partial, match_type, ignore, nested path, snapshot)Lint clean: ruff / pylint / bandit / radon.