diff --git a/.changeset/changesets-repo-name-and-spec-badge.md b/.changeset/changesets-repo-name-and-spec-badge.md
new file mode 100644
index 0000000000..309e094839
--- /dev/null
+++ b/.changeset/changesets-repo-name-and-spec-badge.md
@@ -0,0 +1,32 @@
+---
+"@objectstack/spec": patch
+---
+
+fix(spec,repo): address the changesets `repo` option and the spec README's StackBlitz badge to `objectstack-ai/objectstack` (#12488)
+
+Two places still name `objectstack-ai/spec`, which is not the repository this
+monorepo lives in:
+
+- `.changeset/config.json` — `changelog[1].repo`
+- `packages/spec/README.md` — the "Try Online" StackBlitz badge target
+
+The README badge is the user-visible half. `README.md` is listed in this
+package's `files`, so it ships in the npm tarball and every reader of
+`@objectstack/spec` on npm gets a "Try Online" button addressed to a repository
+that is not this one. The path the badge names —
+`examples/app-todo/objectstack.config.ts` — exists here, so correcting the
+owner/repo segment is the whole fix.
+
+The `.changeset/config.json` half is hygiene with a measured expiry date rather
+than a bug that is firing. The configured generator `@changesets/cli/changelog`
+re-exports `@changesets/changelog-git`, whose `getReleaseLine(changeset)` and
+`getDependencyReleaseLine(changesets, dependenciesUpdated)` do not read the
+third argument — the options object that `@changesets/apply-release-plan`
+passes as `config.changelog[1]`. So `repo` has **no reader today**, and the
+wrong value has never produced a wrong link in any CHANGELOG this repo has
+generated. It acquires a reader the moment anyone swaps in
+`@changesets/changelog-github` — which is the usual reason to touch that block
+— and from then on every generated release line would link into the wrong
+repository, with nothing in the diff looking wrong.
+
+No runtime behaviour changes.
diff --git a/.changeset/config.json b/.changeset/config.json
index 4d50b85b00..e88c868b77 100644
--- a/.changeset/config.json
+++ b/.changeset/config.json
@@ -3,7 +3,7 @@
   "changelog": [
     "@changesets/cli/changelog",
     {
-      "repo": "objectstack-ai/spec"
+      "repo": "objectstack-ai/objectstack"
     }
   ],
   "commit": false,
diff --git a/packages/spec/README.md b/packages/spec/README.md
index f149ad339e..0fe1f7d04a 100644
--- a/packages/spec/README.md
+++ b/packages/spec/README.md
@@ -1,6 +1,6 @@
 # @objectstack/spec
 
-[![Try Online](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/objectstack-ai/spec/tree/main/examples/app-todo?file=objectstack.config.ts)
+[![Try Online](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/objectstack-ai/objectstack/tree/main/examples/app-todo?file=objectstack.config.ts)
 
 The **Source of Truth** for the ObjectStack Protocol. Contains strictly typed Zod schemas that define every aspect of the system.