diff --git a/.github/workflows/dead-code.yml b/.github/workflows/dead-code.yml
new file mode 100644
index 0000000..63707e0
--- /dev/null
+++ b/.github/workflows/dead-code.yml
@@ -0,0 +1,20 @@
+name: Dead code
+# Managed by CodexSkills bootstrap-code-quality.py
+on:
+  pull_request:
+permissions:
+  contents: read
+jobs:
+  dead-code:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: astral-sh/setup-uv@v7
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: bash scripts/check-dead-code.sh
+        env:
+          QUALITY_BASE_REF: origin/${{ github.base_ref }}
diff --git a/AGENTS.md b/AGENTS.md
index 30be90f..4e2a969 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -27,3 +27,8 @@
 - Pricing correctness, simulation integrity, maintained reference cost standards, CLI output, structured LLM parsing, and zero-cost validation are explicit boundaries.
 - Never call OpenRouter, deploy, publish, or mutate billing during validation. Upload generated evidence from CI; do not commit it.
 - Track rollout and failures in Plane item `PCTL-17`.
+
+## Code cleanup
+
+- Run `bash scripts/check-dead-code.sh` after removing code and before review.
+- For cross-file changes, run `graphify update .`, inspect callers and dependencies, and verify findings in current source and framework registrations.
diff --git a/scripts/check-dead-code.sh b/scripts/check-dead-code.sh
new file mode 100755
index 0000000..bba924c
--- /dev/null
+++ b/scripts/check-dead-code.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Managed by CodexSkills bootstrap-code-quality.py
+set -euo pipefail
+cd "$(dirname "$0")/.."
+py_files=()
+while IFS= read -r -d '' file; do py_files+=("$file"); done < <(git ls-files --cached --others --exclude-standard -z -- '*.py')
+if ((${#py_files[@]})); then uvx --from vulture==2.16 vulture "${py_files[@]}" --min-confidence 90; fi
+go vet ./...