diff --git a/.changeset/spec-api-surface-baseline-percent-scale.md b/.changeset/spec-api-surface-baseline-percent-scale.md
new file mode 100644
index 0000000000..1b07342ca6
--- /dev/null
+++ b/.changeset/spec-api-surface-baseline-percent-scale.md
@@ -0,0 +1,11 @@
+---
+---
+
+Regenerates `packages/spec/api-surface.json` so the committed baseline records the
+four `./data` exports the percent-scale chain adds — `PercentScale`,
+`PercentScaleFieldMeta`, `percentScaleOf` and `emptyGroupValueFor`.
+
+Deliberately empty: this releases nothing. `api-surface.json` is a build-time
+snapshot the `check:api-surface` gate diffs against, not shipped code, and the
+exports it now records are already described by the changeset for the change that
+introduced them. Declaring a bump here would double-count that release.
diff --git a/packages/spec/api-surface.json b/packages/spec/api-surface.json
index c24fc55e53..47971d0d1a 100644
--- a/packages/spec/api-surface.json
+++ b/packages/spec/api-surface.json
@@ -473,6 +473,8 @@
     "PaginationConformanceRow (interface)",
     "PerOperationRequiredPermissions (type)",
     "PerOperationRequiredPermissionsSchema (const)",
+    "PercentScale (type)",
+    "PercentScaleFieldMeta (interface)",
     "PoolConfig (type)",
     "PoolConfigSchema (const)",
     "ProvisionPrimaryOptions (interface)",
@@ -612,6 +614,7 @@
     "deriveRecordFlowSurface (function)",
     "deriveRecordSurface (function)",
     "effectiveOperationsArray (function)",
+    "emptyGroupValueFor (function)",
     "fieldForm (const)",
     "foldQueryAliasSlots (function)",
     "formatUnknownAuthoringKey (function)",
@@ -641,6 +644,7 @@
     "parseAutonumberFormat (function)",
     "parseDateMacroParam (function)",
     "parseFilterAST (function)",
+    "percentScaleOf (function)",
     "provisionPrimary (function)",
     "referencedFields (function)",
     "renderAutonumber (function)",