First public release

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

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+# Changelog
+
+## 0.2.1 - 2026-09-28
+
+First public release under MIT.
+
+- `assertShape()` validates a payload with any zod-style parser and throws a
+  framework-independent `ContractDriftError`. Zod 4 symbol paths are handled.
+- `expectFields()` and `assertFields()` check that requested fields actually
+  came back, treating `null` as present and `undefined` as absent.
+- `coverage()` measures contract-check coverage against a floor and lists
+  the uncovered endpoints.
+- `fieldReport()`, `coverageReport()`, `formatFields()` and
+  `formatCoverage()` produce `@extant2000/evidence-record` reports. An empty
+  surface is not assessed.