diff --git a/.changeset/3544-workstream-inventory-builder.md b/.changeset/3544-workstream-inventory-builder.md
new file mode 100644
index 000000000..7114914c9
--- /dev/null
+++ b/.changeset/3544-workstream-inventory-builder.md
@@ -0,0 +1,5 @@
+---
+type: Added
+pr: 3548
+---
+**Adds a generated Workstream Inventory Builder seam with freshness guards** — introduces `sdk/src/workstream-inventory/builder.ts` (and tests) as the canonical builder source, generates `get-shit-done/bin/lib/workstream-inventory-builder.generated.cjs`, wires `check-workstream-inventory-builder-fresh` into hooks/CI, and updates inventory docs/manifests so SDK and installer-facing artifacts stay synchronized.