diff --git a/Makefile b/Makefile
index 8905dc1..1b49dbc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: validate validate-json validate-yaml validate-quadlet validate-render validate-evidence validate-governance validate-policy-fabric validate-activation validate-supply-chain validate-release-bundle validate-sourceos-projections validate-package validate-cli validate-formula doctor probe
+.PHONY: validate validate-json validate-yaml validate-quadlet validate-render validate-evidence validate-governance validate-policy-fabric validate-activation validate-supply-chain validate-release-bundle validate-sourceos-projections validate-package validate-cli validate-formula validate-runtime-install-receipts doctor probe
 
 PYTHON ?= python3
 RUBY ?= ruby
@@ -21,7 +21,7 @@ DECIDED_AT := 2026-05-04T12:51:00Z
 PYCLI := PYTHONPATH=src $(PYTHON) -m agent_machine.cli
 PYMOD := PYTHONPATH=src $(PYTHON) -m
 
-validate: validate-json validate-yaml validate-quadlet validate-render validate-evidence validate-governance validate-policy-fabric validate-activation validate-supply-chain validate-release-bundle validate-sourceos-projections validate-package validate-cli validate-formula
+validate: validate-json validate-yaml validate-quadlet validate-render validate-evidence validate-governance validate-policy-fabric validate-activation validate-supply-chain validate-release-bundle validate-sourceos-projections validate-package validate-cli validate-formula validate-runtime-install-receipts
 
 validate-json:
 	$(PYTHON) scripts/validate-json.py
@@ -102,6 +102,9 @@ validate-cli:
 validate-formula:
 	$(RUBY) -c $(FORMULA)
 
+validate-runtime-install-receipts:
+	$(PYTHON) scripts/validate-runtime-install-receipts.py
+
 doctor:
 	$(BOOTSTRAP_CLI) doctor --format json
 
diff --git a/src/agent_machine/contracts.py b/src/agent_machine/contracts.py
index a0fbeb7..1c9d983 100644
--- a/src/agent_machine/contracts.py
+++ b/src/agent_machine/contracts.py
@@ -56,6 +56,7 @@ def schema_by_kind(root: Path | None = None) -> dict[str, Path]:
         "InferenceProvider": base / "inference-provider.schema.json",
         "PolicyAdmission": base / "policy-admission.schema.json",
         "ReleaseEvidenceBundle": base / "release-evidence-bundle.schema.json",
+        "RuntimeInstallReceipt": base / "runtime-install-receipt.schema.json",
         "SignedReleaseBundleEnvelope": base / "signed-release-bundle-envelope.schema.json",
         "SteeringArtifactReceipt": base / "steering-artifact-receipt.schema.json",
         "SteeringSourceset": base / "steering-sourceset.schema.json",
@@ -96,9 +97,9 @@ def validate_by_kind(instance_path: Path, root: Path | None = None) -> Path:
     instance = load_json(instance_path)
     if not isinstance(instance, dict):
         raise AssertionError(f"{instance_path}: example root must be a JSON object")
-    kind = instance.get("kind")
+    kind = instance.get("kind") or instance.get("type")
     if not isinstance(kind, str):
-        raise AssertionError(f"{instance_path}: missing string `kind` field")
+        raise AssertionError(f"{instance_path}: missing string `kind` or `type` field")
     mapping = schema_by_kind(root)
     schema_path = mapping.get(kind)
     if schema_path is None: