diff --git a/Makefile b/Makefile
index 3173184c..9f5309cf 100644
--- a/Makefile
+++ b/Makefile
@@ -71,6 +71,9 @@ help:
 	@echo "  make ci                 lint + test (CI gate)"
 	@echo "  make clean              Remove outputs/ (except CSV pilot panel)"
 
+claim-check:
+	PYTHONPATH=src $(PYTHON) scripts/safety/check_claims.py
+
 demo:
 	PYTHONPATH=src $(PYTHON) -m openamp_foundry.cli rank \
 		--candidates examples/sequences/demo_candidates.csv \
diff --git a/scripts/safety/check_claims.py b/scripts/safety/check_claims.py
new file mode 100644
index 00000000..5876e4b7
--- /dev/null
+++ b/scripts/safety/check_claims.py
@@ -0,0 +1,103 @@
+"""Scan markdown files for overclaiming language.
+
+Usage:
+    python scripts/check_claims.py
+    python scripts/check_claims.py --path docs/review/
+    make claim-check
+"""
+
+from __future__ import annotations
+
+import re
+import sys
+from pathlib import Path
+
+RISKY_PATTERNS: list[tuple[str, str]] = [
+    (r"\bproven\b", "Avoid 'proven' — computational scores do not prove biological efficacy"),
+    (r"\bsafe in humans\b", "Do not claim human safety without clinical evidence"),
+    (r"\bclinically useful\b", "Do not claim clinical utility without clinical evidence"),
+    (r"\bAI discovered an antibiotic\b", "Use 'computationally nominated candidate' instead"),
+    (r"\bvalidated by computation\b", "Computation triages, does not validate biology"),
+    (r"\bdrug candidate\b", "Use 'computationally nominated candidate' until wet-lab confirmation"),
+    (r"\bcure\b", "Do not claim curative effects"),
+    (r"\bbreakthrough therapy\b", "Do not claim therapeutic breakthroughs"),
+    (r"\beffective in humans\b", "No human data exists"),
+    (r"\bworld.?first\b", "Avoid 'world-first' unless independently verified"),
+    (r"\bproven antimicrobial\b", "Computational prediction is not proof of antimicrobial activity"),
+    (r"\btherapeutic\b(?!\s*(?:target|index|agent|peptide|area|window))", "Use cautiously — 'therapeutic' implies clinical application"),
+]
+
+ALLOWLIST = [
+    "AGENTS.md",
+    "CLAIM_REVIEW_CHECKLIST.md",
+    "MISSION.md",
+]
+
+
+def scan_file(path: Path) -> list[dict]:
+    findings = []
+    try:
+        text = path.read_text(encoding="utf-8", errors="replace")
+    except Exception:
+        return findings
+    for i, line in enumerate(text.split("\n"), 1):
+        for pattern, msg in RISKY_PATTERNS:
+            if re.search(pattern, line, re.IGNORECASE):
+                findings.append({
+                    "file": str(path),
+                    "line": i,
+                    "matched": line.strip()[:120],
+                    "pattern": pattern,
+                    "message": msg,
+                })
+    return findings
+
+
+def scan_docs(docs_dir: str = "docs", allowlist: list[str] | None = None) -> dict:
+    allow = set(allowlist or ALLOWLIST)
+    findings = []
+    for md in sorted(Path(docs_dir).rglob("*.md")):
+        if md.name in allow:
+            continue
+        findings.extend(scan_file(md))
+
+    by_file: dict[str, list] = {}
+    for f in findings:
+        by_file.setdefault(f["file"], []).append(f)
+
+    return {
+        "files_scanned": len(list(Path(docs_dir).rglob("*.md"))),
+        "total_findings": len(findings),
+        "files_with_findings": len(by_file),
+        "findings": findings[:50],
+        "detail_by_file": {k: len(v) for k, v in by_file.items()},
+    }
+
+
+def main() -> int:
+    import argparse
+    parser = argparse.ArgumentParser(description="Check for overclaiming language")
+    parser.add_argument("--path", default="docs", help="Directory to scan")
+    parser.add_argument("--fail-on-findings", action="store_true",
+                        help="Exit 3 if findings exist")
+    args = parser.parse_args()
+
+    result = scan_docs(docs_dir=args.path)
+    print(f"Files scanned: {result['files_scanned']}")
+    print(f"Finding count: {result['total_findings']}")
+    if result["detail_by_file"]:
+        print("\nFiles with findings:")
+        for f, count in sorted(result["detail_by_file"].items()):
+            print(f"  {f}: {count}")
+    for f in result["findings"][:10]:
+        print(f"\n  ❌ {f['file']}:{f['line']}")
+        print(f"     {f['matched']}")
+        print(f"     → {f['message']}")
+
+    if args.fail_on_findings and result["total_findings"]:
+        return 3
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/tests/test_check_claims.py b/tests/test_check_claims.py
new file mode 100644
index 00000000..16057edb
--- /dev/null
+++ b/tests/test_check_claims.py
@@ -0,0 +1,53 @@
+"""Tests for the claim-language scanner."""
+
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+from scripts.safety.check_claims import scan_file, scan_docs
+
+
+def _write_tmp(path: Path, content: str) -> Path:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(content)
+    return path
+
+
+def test_clean_text_no_findings(tmp_path):
+    f = _write_tmp(tmp_path / "clean.md", "This is a computationally nominated candidate.")
+    result = scan_file(f)
+    assert len(result) == 0
+
+
+def test_risky_text_flagged(tmp_path):
+    f = _write_tmp(tmp_path / "risky.md", "This is a drug candidate.")
+    result = scan_file(f)
+    assert len(result) >= 1
+
+
+def test_multiple_patterns(tmp_path):
+    f = _write_tmp(tmp_path / "bad.md", "proven antimicrobial\ndrug candidate")
+    result = scan_file(f)
+    assert len(result) >= 2
+
+
+def test_scanner_runs_on_docs():
+    result = scan_docs(docs_dir="docs")
+    assert result["files_scanned"] > 0
+    assert "total_findings" in result
+
+
+def test_allowlist_excludes(tmp_path):
+    f = _write_tmp(tmp_path / "AGENTS.md", "proven antimicrobial")
+    result = scan_docs(docs_dir=str(tmp_path))
+    assert result["total_findings"] == 0
+
+
+def test_cli_runs():
+    r = subprocess.run(
+        [sys.executable, "scripts/safety/check_claims.py", "--path", "docs"],
+        capture_output=True, text=True,
+        env={"PYTHONPATH": "src"},
+    )
+    assert r.returncode == 0