diff --git a/.changeset/canary-coverage-gap.md b/.changeset/canary-coverage-gap.md
new file mode 100644
index 0000000..e7a6bf1
--- /dev/null
+++ b/.changeset/canary-coverage-gap.md
@@ -0,0 +1,7 @@
+---
+"@platforma-open/milaboratories.sequence-properties.ui": patch
+---
+
+Canary (throwaway): UI-only changeset while the model package source is also
+edited. Confirms the coverage check still flags a directly-edited package that
+is missing from the changeset (expected red on the diagnostic).
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b39e54e..95fa59a 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -23,7 +23,7 @@ jobs:
     needs:
       - init
 
-    uses: milaboratory/github-ci/.github/workflows/node-simple-pnpm.yaml@v4
+    uses: milaboratory/github-ci/.github/workflows/node-simple-pnpm.yaml@v4-beta
     with:
       app-name: 'Block: sequence-properties'
       app-name-slug: 'block-sequence-properties'
diff --git a/model/src/types.ts b/model/src/types.ts
index 6fff0bd..2983a51 100644
--- a/model/src/types.ts
+++ b/model/src/types.ts
@@ -1,3 +1,4 @@
+// canary: coverage-gap red-check test (throwaway, do not merge)
 import type { GraphMakerState } from "@milaboratories/graph-maker";
 import type { PlDataTableStateV2, PlRef } from "@platforma-sdk/model";