diff --git a/.changeset/unthrown-v3.md b/.changeset/unthrown-v3.md
deleted file mode 100644
index 694071e6..00000000
--- a/.changeset/unthrown-v3.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-"@temporal-contract/contract": major
-"@temporal-contract/worker": major
-"@temporal-contract/client": major
-"@temporal-contract/testing": major
----
-
-Upgrade to [`unthrown`](https://github.com/btravstack/unthrown) 3.0.0.
-
-The published packages' `unthrown` peer-dependency range moves to `^3`. unthrown 3.0.0's breaking change — removing the standalone `Defect` constructor in favour of a `defect` argument passed into `fromPromise` / `fromThrowable`'s `qualify` callback — does not affect temporal-contract, which never constructs defects (every boundary maps rejections to a modeled error). Everything else we use (`Ok` / `Err`, `TaggedError`, `matchTags`, `fromPromise` / `fromSafePromise`, `result.match({ ok, err, defect })`, `.toAsync()`, and the `result.isOk()` / `isErr()` / `isDefect()` narrowing) is unchanged, so no source changes were required.
-
-**Breaking for consumers**: bump your own `unthrown` install to `^3`.
diff --git a/packages/client/CHANGELOG.md b/packages/client/CHANGELOG.md
index 1070d5b4..f6e5d3d8 100644
--- a/packages/client/CHANGELOG.md
+++ b/packages/client/CHANGELOG.md
@@ -1,5 +1,20 @@
 # @temporal-contract/client
 
+## 6.0.0
+
+### Major Changes
+
+- 6c79004: Upgrade to [`unthrown`](https://github.com/btravstack/unthrown) 3.0.0.
+
+  The published packages' `unthrown` peer-dependency range moves to `^3`. unthrown 3.0.0's breaking change — removing the standalone `Defect` constructor in favour of a `defect` argument passed into `fromPromise` / `fromThrowable`'s `qualify` callback — does not affect temporal-contract, which never constructs defects (every boundary maps rejections to a modeled error). Everything else we use (`Ok` / `Err`, `TaggedError`, `matchTags`, `fromPromise` / `fromSafePromise`, `result.match({ ok, err, defect })`, `.toAsync()`, and the `result.isOk()` / `isErr()` / `isDefect()` narrowing) is unchanged, so no source changes were required.
+
+  **Breaking for consumers**: bump your own `unthrown` install to `^3`.
+
+### Patch Changes
+
+- Updated dependencies [6c79004]
+  - @temporal-contract/contract@6.0.0
+
 ## 5.0.0
 
 ### Major Changes
diff --git a/packages/client/package.json b/packages/client/package.json
index da274cd1..b9165c17 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@temporal-contract/client",
-  "version": "5.0.0",
+  "version": "6.0.0",
   "description": "Client utilities with unthrown Result/AsyncResult for consuming temporal-contract workflows",
   "keywords": [
     "client",
diff --git a/packages/contract/CHANGELOG.md b/packages/contract/CHANGELOG.md
index 1d1a75fb..cea13947 100644
--- a/packages/contract/CHANGELOG.md
+++ b/packages/contract/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @temporal-contract/contract
 
+## 6.0.0
+
+### Major Changes
+
+- 6c79004: Upgrade to [`unthrown`](https://github.com/btravstack/unthrown) 3.0.0.
+
+  The published packages' `unthrown` peer-dependency range moves to `^3`. unthrown 3.0.0's breaking change — removing the standalone `Defect` constructor in favour of a `defect` argument passed into `fromPromise` / `fromThrowable`'s `qualify` callback — does not affect temporal-contract, which never constructs defects (every boundary maps rejections to a modeled error). Everything else we use (`Ok` / `Err`, `TaggedError`, `matchTags`, `fromPromise` / `fromSafePromise`, `result.match({ ok, err, defect })`, `.toAsync()`, and the `result.isOk()` / `isErr()` / `isDefect()` narrowing) is unchanged, so no source changes were required.
+
+  **Breaking for consumers**: bump your own `unthrown` install to `^3`.
+
 ## 5.0.0
 
 ### Major Changes
diff --git a/packages/contract/package.json b/packages/contract/package.json
index db4d980a..ba6cc964 100644
--- a/packages/contract/package.json
+++ b/packages/contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@temporal-contract/contract",
-  "version": "5.0.0",
+  "version": "6.0.0",
   "description": "Contract builder for temporal-contract",
   "keywords": [
     "contract",
diff --git a/packages/testing/CHANGELOG.md b/packages/testing/CHANGELOG.md
index a35049df..0943f171 100644
--- a/packages/testing/CHANGELOG.md
+++ b/packages/testing/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @temporal-contract/testing
 
+## 6.0.0
+
+### Major Changes
+
+- 6c79004: Upgrade to [`unthrown`](https://github.com/btravstack/unthrown) 3.0.0.
+
+  The published packages' `unthrown` peer-dependency range moves to `^3`. unthrown 3.0.0's breaking change — removing the standalone `Defect` constructor in favour of a `defect` argument passed into `fromPromise` / `fromThrowable`'s `qualify` callback — does not affect temporal-contract, which never constructs defects (every boundary maps rejections to a modeled error). Everything else we use (`Ok` / `Err`, `TaggedError`, `matchTags`, `fromPromise` / `fromSafePromise`, `result.match({ ok, err, defect })`, `.toAsync()`, and the `result.isOk()` / `isErr()` / `isDefect()` narrowing) is unchanged, so no source changes were required.
+
+  **Breaking for consumers**: bump your own `unthrown` install to `^3`.
+
 ## 5.0.0
 
 ### Major Changes
diff --git a/packages/testing/package.json b/packages/testing/package.json
index 0e5fdfb1..1f9a03af 100644
--- a/packages/testing/package.json
+++ b/packages/testing/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@temporal-contract/testing",
-  "version": "5.0.0",
+  "version": "6.0.0",
   "description": "Temporal testing utilities",
   "homepage": "https://github.com/btravstack/temporal-contract#readme",
   "bugs": {
diff --git a/packages/worker/CHANGELOG.md b/packages/worker/CHANGELOG.md
index 46512ab1..2e59180f 100644
--- a/packages/worker/CHANGELOG.md
+++ b/packages/worker/CHANGELOG.md
@@ -1,5 +1,20 @@
 # @temporal-contract/worker
 
+## 6.0.0
+
+### Major Changes
+
+- 6c79004: Upgrade to [`unthrown`](https://github.com/btravstack/unthrown) 3.0.0.
+
+  The published packages' `unthrown` peer-dependency range moves to `^3`. unthrown 3.0.0's breaking change — removing the standalone `Defect` constructor in favour of a `defect` argument passed into `fromPromise` / `fromThrowable`'s `qualify` callback — does not affect temporal-contract, which never constructs defects (every boundary maps rejections to a modeled error). Everything else we use (`Ok` / `Err`, `TaggedError`, `matchTags`, `fromPromise` / `fromSafePromise`, `result.match({ ok, err, defect })`, `.toAsync()`, and the `result.isOk()` / `isErr()` / `isDefect()` narrowing) is unchanged, so no source changes were required.
+
+  **Breaking for consumers**: bump your own `unthrown` install to `^3`.
+
+### Patch Changes
+
+- Updated dependencies [6c79004]
+  - @temporal-contract/contract@6.0.0
+
 ## 5.0.0
 
 ### Major Changes
diff --git a/packages/worker/package.json b/packages/worker/package.json
index da400a02..40657e93 100644
--- a/packages/worker/package.json
+++ b/packages/worker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@temporal-contract/worker",
-  "version": "5.0.0",
+  "version": "6.0.0",
   "description": "Worker utilities with unthrown Result/AsyncResult for implementing temporal-contract workflows and activities",
   "keywords": [
     "contract",