QVAC-18184 chore[skiplog]: backmerge release sdk 0.9.2

packages/sdk/CHANGELOG.md

@@ -1,5 +1,28 @@
 # Changelog
 
+## [0.9.2]
+
+📦 **NPM:** https://www.npmjs.com/package/@qvac/sdk/v/0.9.2
+
+Hotfix patch release. Single-fix patch — no API, behavioral, or model changes.
+
+---
+
+## 🐞 Fixes
+
+### Fix `TypeError: z.xor is not a function` for consumers on zod < 4.3
+
+The SDK's finetune schemas used `z.xor([z.number(), z.nan()])` in 8 places, an API only available in zod ≥ 4.3.0. The package declared `"zod": "^4.0.17"`, so consumer projects whose tree resolved zod to a 4.0.x / 4.1.x / 4.2.x version crashed at runtime when finetune schemas loaded.
+
+Two coordinated changes:
+
+- Replaced `z.xor([z.number(), z.nan()])` with `z.union([z.number(), z.nan()])` in `packages/sdk/schemas/finetune.ts`. In zod v4, `z.number()` rejects `NaN` by default, so `z.number()` and `z.nan()` are disjoint — `z.xor` and `z.union` are semantically identical here.
+- Bumped the declared `zod` floor from `^4.0.17` to `^4.3.0` to align the declared range with the version of zod the SDK is actually built and tested against.
+
+Consumers who hit `_zod.z.xor is not a function` on `0.9.1` will be unblocked at runtime after upgrading to `0.9.2`.
+
+See PR [#1790](https://github.com/tetherto/qvac/pull/1790) for full details and reasoning.
+
 ## [0.9.1]
 
 📦 **NPM:** https://www.npmjs.com/package/@qvac/sdk/v/0.9.1

packages/sdk/changelog/0.9.2/CHANGELOG.md

@@ -0,0 +1,7 @@
+# Changelog v0.9.2
+
+Release Date: 2026-04-30
+
+## 🐞 Fixes
+
+- Replace `z.xor` with `z.union` in finetune schemas and bump `zod` floor to `^4.3.0` to fix `TypeError: _zod.z.xor is not a function` for consumers whose tree resolved `zod` to a pre-4.3 version. (see PR [#1790](https://github.com/tetherto/qvac/pull/1790))

packages/sdk/changelog/0.9.2/CHANGELOG_LLM.md

@@ -0,0 +1,22 @@
+# QVAC SDK v0.9.2 Release Notes
+
+📦 **NPM:** https://www.npmjs.com/package/@qvac/sdk/v/0.9.2
+
+Hotfix patch release. Single-fix patch — no API, behavioral, or model changes.
+
+---
+
+## 🐞 Fixes
+
+### Fix `TypeError: z.xor is not a function` for consumers on zod < 4.3
+
+The SDK's finetune schemas used `z.xor([z.number(), z.nan()])` in 8 places, an API only available in zod ≥ 4.3.0. The package declared `"zod": "^4.0.17"`, so consumer projects whose tree resolved zod to a 4.0.x / 4.1.x / 4.2.x version crashed at runtime when finetune schemas loaded.
+
+Two coordinated changes:
+
+- Replaced `z.xor([z.number(), z.nan()])` with `z.union([z.number(), z.nan()])` in `packages/sdk/schemas/finetune.ts`. In zod v4, `z.number()` rejects `NaN` by default, so `z.number()` and `z.nan()` are disjoint — `z.xor` and `z.union` are semantically identical here.
+- Bumped the declared `zod` floor from `^4.0.17` to `^4.3.0` to align the declared range with the version of zod the SDK is actually built and tested against.
+
+Consumers who hit `_zod.z.xor is not a function` on `0.9.1` will be unblocked at runtime after upgrading to `0.9.2`.
+
+See PR [#1790](https://github.com/tetherto/qvac/pull/1790) for full details and reasoning.

packages/sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@qvac/sdk",
-  "version": "0.9.1",
+  "version": "0.9.2",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",