Add Python dead-code checks for daily cleanup

.github/workflows/dead-code.yml

@@ -0,0 +1,17 @@
+name: Dead code
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  vulture:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - run: python -m pip install vulture==2.16
+      - run: vulture runtime scripts tests --min-confidence 90

AGENTS.md

@@ -0,0 +1,4 @@
+# Code cleanup
+
+- Install `requirements-dev.txt` and run `vulture runtime scripts tests --min-confidence 90` after Python removals. Pull-request CI runs the same check.
+- For cross-file removals, refresh Graphify and inspect callers before deleting. Verify current source and framework registrations.

requirements-dev.txt

@@ -0,0 +1,2 @@
+-r requirements.txt
+vulture==2.16

tests/test_jev.py

@@ -23,7 +23,7 @@
 
 class Answer:
     def __init__(self, **values): self.values = values
-    def model_dump(self, mode="python"): return self.values
+    def model_dump(self, mode="python"): return self.values  # noqa: vulture - required interface
 
 
 class Primitive: