diff --git a/.github/workflows/drift-check.yml b/.github/workflows/drift-check.yml
new file mode 100644
index 0000000..7753bbf
--- /dev/null
+++ b/.github/workflows/drift-check.yml
@@ -0,0 +1,52 @@
+name: Drift Check
+
+# Daily drift detection for crypto strategies.
+
+on:
+  schedule:
+    - cron: "0 6 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  drift:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    env:
+      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+      STRATEGY_DOMAIN: crypto
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Checkout QuantPlatformKit
+        uses: actions/checkout@v6
+        with:
+          repository: QuantStrategyLab/QuantPlatformKit
+          ref: main
+          path: external/QuantPlatformKit
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          set -euo pipefail
+          python -m pip install --upgrade pip
+          python -m pip install -e . pandas
+          python -m pip install --no-deps -e external/QuantPlatformKit
+
+      - name: Run drift detection
+        run: quant-lifecycle drift --domain crypto --no-alerts
+
+      - name: Sync drift alerts to GitHub Issues
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+        run: python scripts/run_drift_github_issues.py
diff --git a/.github/workflows/evidence-gate.yml b/.github/workflows/evidence-gate.yml
new file mode 100644
index 0000000..9261593
--- /dev/null
+++ b/.github/workflows/evidence-gate.yml
@@ -0,0 +1,76 @@
+name: Evidence Gate
+
+# Block PRs that promote catalog status without a valid evidence package.
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+    paths:
+      - "src/**/catalog.py"
+      - "src/**/combo_manifests.py"
+      - "docs/evidence/**"
+      - "evidence/**"
+
+permissions:
+  contents: read
+  pull-requests: read
+
+concurrency:
+  group: evidence-gate-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  gate:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    env:
+      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Resolve QuantPlatformKit ref
+        id: quant-platform-kit-ref
+        run: |
+          set -euo pipefail
+          ref="main"
+          if [ -n "${GITHUB_HEAD_REF:-}" ]; then
+            case "${GITHUB_HEAD_REF}" in
+              dependabot/*)
+                ;;
+              *)
+                if git ls-remote --exit-code --heads https://github.com/QuantStrategyLab/QuantPlatformKit.git "${GITHUB_HEAD_REF}" >/dev/null 2>&1; then
+                  ref="${GITHUB_HEAD_REF}"
+                fi
+                ;;
+            esac
+          fi
+          echo "ref=${ref}" >> "$GITHUB_OUTPUT"
+
+      - name: Checkout QuantPlatformKit
+        uses: actions/checkout@v6
+        with:
+          repository: QuantStrategyLab/QuantPlatformKit
+          ref: ${{ steps.quant-platform-kit-ref.outputs.ref }}
+          path: external/QuantPlatformKit
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          set -euo pipefail
+          python -m pip install --upgrade pip
+          python -m pip install -e . pandas
+          python -m pip install --no-deps -e external/QuantPlatformKit
+
+      - name: Evaluate Evidence Gate
+        env:
+          GITHUB_BASE_REF: ${{ github.base_ref }}
+        run: python scripts/gate_evidence_package.py
diff --git a/scripts/gate_evidence_package.py b/scripts/gate_evidence_package.py
new file mode 100755
index 0000000..7547c7c
--- /dev/null
+++ b/scripts/gate_evidence_package.py
@@ -0,0 +1,129 @@
+#!/usr/bin/env python3
+"""PR gate: require a valid evidence package when catalog status is promoted."""
+
+from __future__ import annotations
+
+import os
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+GATE_STAGES = frozenset(
+    {
+        "ai_monitored_candidate",
+        "shadow_candidate",
+        "live_candidate",
+        "runtime_enabled",
+    }
+)
+STATUS_ADDED_RE = re.compile(r'^\+.*status="([^"]+)"')
+EVIDENCE_SUFFIXES = {".json", ".toml"}
+
+
+def _git_diff(base_ref: str) -> str:
+    result = subprocess.run(
+        ["git", "diff", f"origin/{base_ref}...HEAD", "--", "src"],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    if result.returncode != 0:
+        result = subprocess.run(
+            ["git", "diff", f"{base_ref}...HEAD", "--", "src"],
+            capture_output=True,
+            text=True,
+            check=True,
+        )
+    return result.stdout
+
+
+def _promotion_detected(diff: str) -> bool:
+    if "status=" not in diff:
+        return False
+    return any(match.group(1) in GATE_STAGES for line in diff.splitlines() if (match := STATUS_ADDED_RE.match(line)))
+
+
+def _evidence_paths_from_diff(diff: str) -> list[Path]:
+    paths: list[Path] = []
+    for line in diff.splitlines():
+        if not line.startswith("+++ b/"):
+            continue
+        candidate = Path(line[6:])
+        if candidate.suffix.lower() not in EVIDENCE_SUFFIXES:
+            continue
+        if "evidence" in candidate.parts or candidate.parent.name == "evidence":
+            paths.append(candidate)
+    return paths
+
+
+def _discover_evidence_files(diff: str) -> list[Path]:
+    discovered = _evidence_paths_from_diff(diff)
+    for folder in (Path("docs/evidence"), Path("evidence")):
+        if folder.is_dir():
+            discovered.extend(path for path in folder.iterdir() if path.suffix.lower() in EVIDENCE_SUFFIXES)
+    explicit = os.environ.get("EVIDENCE_PACKAGE_PATH", "").strip()
+    if explicit:
+        discovered.append(Path(explicit))
+    return sorted({path for path in discovered if path.exists()})
+
+
+def _validate_with_lifecycle(path: Path) -> tuple[bool, list[str]]:
+    from quant_platform_kit.strategy_lifecycle.evidence_gate import validate_evidence_package_file
+
+    result = validate_evidence_package_file(path)
+    issues = list(result.issues)
+    return result.valid, issues
+
+
+def _validate_with_promotion_standard(path: Path) -> tuple[bool, list[str]]:
+    script = Path("external/QuantPlatformKit/scripts/validate_strategy_evidence_package.py")
+    if not script.exists():
+        return True, []
+    result = subprocess.run(
+        [sys.executable, str(script), str(path)],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    if result.returncode == 0:
+        return True, []
+    issues = [line for line in result.stderr.splitlines() if line.strip()]
+    issues.extend(line for line in result.stdout.splitlines() if line.strip())
+    return False, issues or ["promotion evidence package validation failed"]
+
+
+def main() -> int:
+    base_ref = os.environ.get("GITHUB_BASE_REF", "main").strip() or "main"
+    diff = _git_diff(base_ref)
+
+    if not _promotion_detected(diff):
+        print("[evidence-gate] No lifecycle status promotion detected; skipping validation")
+        return 0
+
+    evidence_files = _discover_evidence_files(diff)
+    if not evidence_files:
+        print(
+            "::error::Catalog status promotion detected but no evidence package file was found. "
+            "Add docs/evidence/<profile>.json with the 11 required artifacts.",
+            file=sys.stderr,
+        )
+        return 1
+
+    failed = False
+    for path in evidence_files:
+        lifecycle_ok, lifecycle_issues = _validate_with_lifecycle(path)
+        standard_ok, standard_issues = _validate_with_promotion_standard(path)
+        if lifecycle_ok and standard_ok:
+            print(f"[evidence-gate] PASS {path}")
+            continue
+        failed = True
+        print(f"[evidence-gate] FAIL {path}", file=sys.stderr)
+        for issue in lifecycle_issues + standard_issues:
+            print(f"  - {issue}", file=sys.stderr)
+
+    return 1 if failed else 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/run_drift_github_issues.py b/scripts/run_drift_github_issues.py
new file mode 100755
index 0000000..830b33c
--- /dev/null
+++ b/scripts/run_drift_github_issues.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Create GitHub issues for drift alerts after quant-lifecycle drift detection."""
+
+from __future__ import annotations
+
+import os
+import sys
+
+
+def main() -> int:
+    domain = os.environ.get("STRATEGY_DOMAIN", "").strip()
+    if not domain:
+        print("::error::STRATEGY_DOMAIN is required", file=sys.stderr)
+        return 1
+
+    repository = os.environ.get("GITHUB_REPOSITORY", "").strip()
+    if "/" in repository:
+        owner, repo = repository.split("/", 1)
+        os.environ.setdefault("CODEX_AUDIT_ORG", owner)
+        os.environ.setdefault("CODEX_AUDIT_ORCHESTRATOR_REPO", repo)
+
+    from quant_platform_kit.strategy_lifecycle.codex_integration import create_issues_for_domain
+    from quant_platform_kit.strategy_lifecycle.drift_detector import run_drift_detection
+
+    drifts = run_drift_detection(domain)
+    critical = sum(1 for item in drifts if getattr(getattr(item, "status", None), "value", "") == "critical")
+    review = sum(1 for item in drifts if getattr(getattr(item, "status", None), "value", "") == "review")
+    print(f"[drift-check] domain={domain} checked={len(drifts)} review={review} critical={critical}")
+
+    results = create_issues_for_domain(domain, dry_run=False)
+    created = [item for item in results if item.get("issue_url")]
+    errors = [item for item in results if item.get("error")]
+    print(f"[drift-check] issues_created={len(created)} errors={len(errors)}")
+    for item in created:
+        print(f"  - {item.get('issue_url')}")
+    for item in errors:
+        print(f"::warning::{item.get('title')}: {item.get('error')}", file=sys.stderr)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())