diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# Changelog
+
+All notable changes to `@harperfast/oauth` are documented here.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [2.0.0-alpha.2] — 2026-05-12
+
+### Breaking
+
+- **`withOAuthValidation` now wraps a Resource _class_, not an instance.** This aligns with the Harper v5 Resource API v2 dispatch model, where the framework can call either the user's instance method or a static method on the class. The previous instance-wrapping shape only intercepted the instance-method path; the class-wrapping shape covers both. Callers must update the wrap call to pass the class (or use the new entry-point re-export — see Fixed). The pattern is documented in the JSDoc and exercised throughout the new test suite.
+
+### Security
+
+- **Fail-closed when `requireAuth: true` and no request context is available.** Previously a missing context could fall through to the wrapped method without validation. Now returns 401.
+- **Fail-closed when `onValidationError` returns `undefined`.** `undefined` was indistinguishable from "no override, continue" in the surrounding dispatch; a caller-supplied `onValidationError` that returned `undefined` (intentionally or otherwise) could bypass the deny path. Now `undefined` is treated as the default deny.
+- **Closed a static-method dispatch bypass.** Wrappers that intercepted only the instance method were silently bypassed when the user adopted the static-method pattern (where Harper's REST dispatcher calls `Class.get(target, request)` directly). Both surfaces are now covered, with dedup so a single dispatch doesn't run validation twice.
+- **`onValidationError` no longer sees a mutated request.** Earlier, certain verbs (`put` / `patch` / `delete`) would mutate the request object before invoking the callback, leaking partial state. The callback now receives the un-mutated request consistently across all verbs.
+- **`onValidationError` is not invoked without a request.** A no-context invocation could pass `undefined` as the request argument. The call site now skips the callback in this case (and falls back to the standard deny path).
+
+### Fixed
+
+- **`withOAuthValidation` is re-exported from the package entry point** (`src/index.ts`). Previously, importing from `@harperfast/oauth` did not surface the wrapper directly; consumers had to reach into the package's internal paths.
+- **`withOAuthValidation` reads request from `getContext()`.** Aligns with the Harper v5 context model. Closes [#33](https://github.com/HarperFast/oauth/issues/33).
+- **Preserve `405 Method Not Allowed` for unimplemented verbs.** The wrapper previously replaced unimplemented base-class methods with a function that returned `undefined`, which Harper then serialized as `204 No Content`. Now wraps only the verbs the parent class actually implements.
+- **Preserve `405` against Harper-shaped base classes** and harden dedup across dispatch normalization (the path the framework takes when both static and instance methods are present).
+- **`package-lock.json` regenerated with all optional native dependencies** — prior lockfile was missing platform-conditional entries that broke cross-platform `npm ci`.
+
+### Added
+
+- **Test coverage for the refactored `withOAuthValidation`.** New test suite at `test/lib/withOAuthValidation.test.js` (+1247 lines) covers each verb, the static + instance dispatch paths, fail-closed branches, `onValidationError` callback contract, expired-token paths, and the class-wrap pattern.
+- **Integration test harness.** New `integrationTests/` tree with Harper v5 integration fixtures, including `env-var-substitution.test.ts`. Runs via `harper-integration-test-run` from the integration testing toolchain.
+- **`harper-mock` test helper** at `test/helpers/harper-mock.mjs` enables Node-only unit tests without requiring a running Harper instance. Loaded via `node --import` in the `npm test` script.
+
+### Changed
+
+- **Node.js 20 is no longer supported.** The Harper mock helper relies on Node 22+ features. Supported Node range matches Harper v5.
+- **`onValidationError` contract documented in JSDoc.** Includes the `requireAuth` coupling and the request-state visibility rules introduced by the fixes above.
+
+## [2.0.0-alpha.1] — 2026-05-01
+
+### Breaking
+
+- **Migrated to Harper v5 (`harper` npm package).** Previously depended on `harperdb` (v4); now depends on the `harper` peer-dependency for Harper v5. This requires consuming applications to upgrade to Harper v5. See the Harper v5 migration guide for the underlying API changes.
+
+### Added
+
+- Test coverage for `scope.resources` / `scope.server` guard (the typed-as-optional-but-always-assigned shape from Harper v5's Scope constructor).
+
+## [1.4.0] — 2026-02-18
+
+- Simple in-memory cache for dynamic provider configs (`cacheDynamicProviders`).
+- Updated Okta issuer handling.
+
+## [1.3.0] — 2026-02-18
+
+- Added `cacheDynamicProviders` option.
+
+## [1.2.1] — 2026-02-10
+
+- Format fix.
+
+## [1.2.0] — 2026-02-10
+
+- Initial public release on `@harperfast/oauth` scope.
+
+[2.0.0-alpha.2]: https://github.com/HarperFast/oauth/compare/v2.0.0-alpha.1...v2.0.0-alpha.2
+[2.0.0-alpha.1]: https://github.com/HarperFast/oauth/compare/v1.4.0...v2.0.0-alpha.1
+[1.4.0]: https://github.com/HarperFast/oauth/compare/v1.3.0...v1.4.0
+[1.3.0]: https://github.com/HarperFast/oauth/compare/v1.2.1...v1.3.0
+[1.2.1]: https://github.com/HarperFast/oauth/compare/v1.2.0...v1.2.1
+[1.2.0]: https://github.com/HarperFast/oauth/releases/tag/v1.2.0
diff --git a/package-lock.json b/package-lock.json
index 4c54099..84f11b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "@harperfast/oauth",
-	"version": "2.0.0-alpha.1",
+	"version": "2.0.0-alpha.2",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@harperfast/oauth",
-			"version": "2.0.0-alpha.1",
+			"version": "2.0.0-alpha.2",
 			"license": "Apache-2.0",
 			"dependencies": {
 				"jsonwebtoken": "^9.0.2",
diff --git a/package.json b/package.json
index 04200f9..966a650 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@harperfast/oauth",
-	"version": "2.0.0-alpha.1",
+	"version": "2.0.0-alpha.2",
 	"description": "OAuth 2.0 authentication plugin for Harper",
 	"license": "Apache-2.0",
 	"author": {