diff --git a/.cursor/rules/no-dynamic-import.mdc b/.cursor/rules/no-dynamic-import.mdc
new file mode 100644
index 0000000..5378994
--- /dev/null
+++ b/.cursor/rules/no-dynamic-import.mdc
@@ -0,0 +1,34 @@
+---
+description: Ban dynamic import() in production code — use static imports instead
+globs: packages/*/src/**/*.ts
+alwaysApply: true
+---
+
+# No Dynamic Import in Production Code
+
+## Rule
+
+Do NOT use `await import()` or dynamic `import()` expressions in production source code.
+Always use static top-level `import` statements.
+
+## Why
+
+- Static imports enable tree-shaking and bundler optimizations
+- They make dependencies explicit and discoverable at a glance
+- Dynamic imports of Node built-ins or project modules add unnecessary async overhead
+
+## Exceptions (must include a comment explaining why)
+
+1. **`sense-runtime.ts`** — loads user-authored sense modules whose paths are only known at runtime
+2. **`workflow-worker.ts`** — loads user-authored workflow modules whose paths are only known at runtime
+
+When suppressing, add a comment directly above:
+
+```ts
+// Dynamic import required: user module path resolved at runtime
+const mod = await import(senseIndexPath);
+```
+
+## Test Files
+
+Test files (`__tests__/**`) are exempt — dynamic import after `vi.mock()` is standard vitest practice.
diff --git a/packages/daemon/src/sense-runtime.ts b/packages/daemon/src/sense-runtime.ts
index 0b7021c..2baf01a 100644
--- a/packages/daemon/src/sense-runtime.ts
+++ b/packages/daemon/src/sense-runtime.ts
@@ -173,6 +173,7 @@ export async function loadComputeFn(senseIndexPath: string): Promise<Result<Comp
   let mod: unknown;
 
   try {
+    // Dynamic import required: user-authored sense module, path resolved at runtime
     mod = await import(senseIndexPath);
   } catch (e) {
     const msg = e instanceof Error ? e.message : String(e);
diff --git a/packages/daemon/src/workflow-worker.ts b/packages/daemon/src/workflow-worker.ts
index e405900..93ab550 100644
--- a/packages/daemon/src/workflow-worker.ts
+++ b/packages/daemon/src/workflow-worker.ts
@@ -197,6 +197,7 @@ async function loadWorkflowDefinition(
     );
   }
 
+  // Dynamic import required: user-authored workflow module, path resolved at runtime
   const mod = await import(indexPath);
   const def: unknown = mod.default ?? mod;