diff --git a/include/amduat/asl/store.h b/include/amduat/asl/store.h
index ed371d5..1becd3e 100644
--- a/include/amduat/asl/store.h
+++ b/include/amduat/asl/store.h
@@ -11,6 +11,7 @@
 extern "C" {
 #endif
 
+/* Zero-initialize before setting fields to keep future-compatibility. */
 typedef struct {
   amduat_asl_encoding_profile_id_t encoding_profile_id;
   amduat_hash_id_t hash_id;
@@ -31,6 +32,9 @@ typedef struct {
   amduat_asl_store_error_t (*get)(void *ctx,
                                   amduat_reference_t ref,
                                   amduat_artifact_t *out_artifact);
+  amduat_asl_store_error_t (*validate_config)(
+      void *ctx,
+      amduat_asl_store_config_t config);
 } amduat_asl_store_ops_t;
 
 typedef struct {
diff --git a/src/adapters/asl_store_fs/asl_store_fs.c b/src/adapters/asl_store_fs/asl_store_fs.c
index 2fa13bb..8f2dae2 100644
--- a/src/adapters/asl_store_fs/asl_store_fs.c
+++ b/src/adapters/asl_store_fs/asl_store_fs.c
@@ -489,6 +489,28 @@ static amduat_asl_store_error_t amduat_asl_store_fs_put_impl(
   return AMDUAT_ASL_STORE_OK;
 }
 
+static amduat_asl_store_error_t amduat_asl_store_fs_validate_config(
+    void *ctx,
+    amduat_asl_store_config_t config) {
+  const amduat_hash_asl1_desc_t *hash_desc;
+
+  (void)ctx;
+
+  if (config.encoding_profile_id != AMDUAT_ENC_ASL1_CORE_V1) {
+    return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
+  }
+  hash_desc = amduat_hash_asl1_desc_lookup(config.hash_id);
+  if (hash_desc == NULL || hash_desc->digest_len == 0 ||
+      hash_desc->impl.digest == NULL) {
+    return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
+  }
+  if (hash_desc->digest_len < AMDUAT_ASL_STORE_FS_MIN_DIGEST_BYTES) {
+    return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
+  }
+
+  return AMDUAT_ASL_STORE_OK;
+}
+
 static amduat_asl_store_error_t amduat_asl_store_fs_get_impl(
     void *ctx,
     amduat_reference_t ref,
@@ -671,7 +693,9 @@ bool amduat_asl_store_fs_init(amduat_asl_store_fs_t *fs,
 amduat_asl_store_ops_t amduat_asl_store_fs_ops(void) {
   amduat_asl_store_ops_t ops;
 
+  memset(&ops, 0, sizeof(ops));
   ops.put = amduat_asl_store_fs_put_impl;
   ops.get = amduat_asl_store_fs_get_impl;
+  ops.validate_config = amduat_asl_store_fs_validate_config;
   return ops;
 }
diff --git a/src/near_core/asl/store.c b/src/near_core/asl/store.c
index b452074..847988a 100644
--- a/src/near_core/asl/store.c
+++ b/src/near_core/asl/store.c
@@ -1,23 +1,11 @@
 #include "amduat/asl/store.h"
-#include "amduat/enc/asl1_core.h"
-#include "amduat/hash/asl1.h"
 
-static bool amduat_asl_store_config_supported(
-    const amduat_asl_store_config_t *config) {
-  const amduat_hash_asl1_desc_t *hash_desc;
-
-  if (config == NULL) {
-    return false;
+static amduat_asl_store_error_t amduat_asl_store_validate_config(
+    amduat_asl_store_t *store) {
+  if (store == NULL || store->ops.validate_config == NULL) {
+    return AMDUAT_ASL_STORE_OK;
   }
-  if (amduat_enc_asl1_core_desc_lookup(config->encoding_profile_id) == NULL) {
-    return false;
-  }
-  hash_desc = amduat_hash_asl1_desc_lookup(config->hash_id);
-  if (hash_desc == NULL || hash_desc->digest_len == 0 ||
-      hash_desc->impl.digest == NULL) {
-    return false;
-  }
-  return true;
+  return store->ops.validate_config(store->ctx, store->config);
 }
 
 void amduat_asl_store_init(amduat_asl_store_t *store,
@@ -35,26 +23,40 @@ void amduat_asl_store_init(amduat_asl_store_t *store,
 amduat_asl_store_error_t amduat_asl_store_put(amduat_asl_store_t *store,
                                               amduat_artifact_t artifact,
                                               amduat_reference_t *out_ref) {
+  amduat_asl_store_error_t cfg_err;
+  amduat_asl_store_error_t store_err;
+
   if (store == NULL || store->ops.put == NULL) {
     return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
   }
-  if (!amduat_asl_store_config_supported(&store->config)) {
-    return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
+  cfg_err = amduat_asl_store_validate_config(store);
+  if (cfg_err != AMDUAT_ASL_STORE_OK) {
+    return cfg_err;
   }
-  return store->ops.put(store->ctx, artifact, out_ref);
+  store_err = store->ops.put(store->ctx, artifact, out_ref);
+  if (store_err != AMDUAT_ASL_STORE_OK) {
+    return store_err;
+  }
+  if (out_ref != NULL && out_ref->hash_id != store->config.hash_id) {
+    return AMDUAT_ASL_STORE_ERR_INTEGRITY;
+  }
+  return AMDUAT_ASL_STORE_OK;
 }
 
 amduat_asl_store_error_t amduat_asl_store_get(amduat_asl_store_t *store,
                                               amduat_reference_t ref,
                                               amduat_artifact_t *out_artifact) {
+  amduat_asl_store_error_t cfg_err;
+
   if (store == NULL || store->ops.get == NULL) {
     return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
   }
-  if (!amduat_asl_store_config_supported(&store->config)) {
-    return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
-  }
   if (ref.hash_id != store->config.hash_id) {
     return AMDUAT_ASL_STORE_ERR_UNSUPPORTED;
   }
+  cfg_err = amduat_asl_store_validate_config(store);
+  if (cfg_err != AMDUAT_ASL_STORE_OK) {
+    return cfg_err;
+  }
   return store->ops.get(store->ctx, ref, out_artifact);
 }