diff --git a/src/envelope.rs b/src/envelope.rs
index 05bc841..dfa5b06 100644
--- a/src/envelope.rs
+++ b/src/envelope.rs
@@ -107,6 +107,60 @@ mod tests {
         assert_eq!(typed["results"], serde_json::json!(["x", "y"]));
     }
 
+    #[test]
+    fn resource_is_byte_identical_to_hand_rolled_json() {
+        // Same migration guarantee the action/versioned dialects assert: the
+        // resource dialect must serialize identically to the hand-rolled form
+        // it replaced, so adopting the helper is never a wire change.
+        let built = resource(
+            1,
+            "plugins",
+            vec![serde_json::json!({ "name": "github", "version": "0.4.0" })],
+        );
+        let hand = serde_json::json!({
+            "schema_version": 1,
+            "plugins": [{ "name": "github", "version": "0.4.0" }],
+        });
+        assert_eq!(
+            serde_json::to_string_pretty(&built).unwrap(),
+            serde_json::to_string_pretty(&hand).unwrap()
+        );
+    }
+
+    #[test]
+    fn versioned_flattens_a_serialized_struct_alongside_schema_version() {
+        // The shape `plugins validate` / `lanes validate` emit: a report struct
+        // is serialized to a Value, then wrapped. The report's own fields must
+        // stay at the top level next to `schema_version`, not nested under a
+        // key, and the result must match the hand-rolled equivalent.
+        #[derive(Serialize)]
+        struct Report {
+            path: String,
+            lane_count: usize,
+            errors: Vec<String>,
+            warnings: Vec<String>,
+        }
+        let report = Report {
+            path: "fledge.toml".to_string(),
+            lane_count: 3,
+            errors: vec![],
+            warnings: vec!["unpinned step".to_string()],
+        };
+
+        let built = versioned(1, serde_json::to_value(&report).unwrap());
+        let hand = serde_json::json!({
+            "schema_version": 1,
+            "path": "fledge.toml",
+            "lane_count": 3,
+            "errors": [],
+            "warnings": ["unpinned step"],
+        });
+        assert_eq!(
+            serde_json::to_string_pretty(&built).unwrap(),
+            serde_json::to_string_pretty(&hand).unwrap()
+        );
+    }
+
     #[test]
     fn action_leads_with_schema_version_and_action_then_merges_fields() {
         let out = action(
diff --git a/src/lanes/mod.rs b/src/lanes/mod.rs
index 0de4771..f0df252 100644
--- a/src/lanes/mod.rs
+++ b/src/lanes/mod.rs
@@ -40,6 +40,7 @@ pub(super) const LANES_SEARCH_SCHEMA: u32 = 1;
 pub(super) const LANES_IMPORT_SCHEMA: u32 = 1;
 pub(super) const LANES_CREATE_SCHEMA: u32 = 1;
 pub(super) const LANES_PUBLISH_SCHEMA: u32 = 1;
+pub(super) const LANES_VALIDATE_SCHEMA: u32 = 1;
 
 #[derive(Debug, Deserialize)]
 pub(super) struct FledgeFileWithLanes {
diff --git a/src/lanes/validate.rs b/src/lanes/validate.rs
index 575382f..c597528 100644
--- a/src/lanes/validate.rs
+++ b/src/lanes/validate.rs
@@ -174,7 +174,11 @@ pub(crate) fn print_lane_report(
 ) -> Result<()> {
     if json {
         // Wrap with schema_version envelope (matches lanes list/run/search shape).
-        let value = crate::envelope::versioned(1, serde_json::to_value(report)?);
+        // The version comes from the named per-command constant rather than a
+        // literal so a future shape change bumps it in the same place as every
+        // other `lanes` envelope.
+        let value =
+            crate::envelope::versioned(super::LANES_VALIDATE_SCHEMA, serde_json::to_value(report)?);
         println!("{}", serde_json::to_string_pretty(&value)?);
     } else if report.errors.is_empty() && report.warnings.is_empty() {
         println!(
diff --git a/src/plugin/mod.rs b/src/plugin/mod.rs
index beb066b..75afef7 100644
--- a/src/plugin/mod.rs
+++ b/src/plugin/mod.rs
@@ -71,6 +71,7 @@ const PLUGINS_SEARCH_SCHEMA: u32 = 1;
 const PLUGINS_RECOMMEND_SCHEMA: u32 = 1;
 const PLUGINS_CREATE_SCHEMA: u32 = 1;
 const PLUGINS_PUBLISH_SCHEMA: u32 = 1;
+const PLUGINS_VALIDATE_SCHEMA: u32 = 1;
 
 // ─── Types ───────────────────────────────────────────────────────────────────
 
diff --git a/src/plugin/validate.rs b/src/plugin/validate.rs
index 8845506..eb5ddcf 100644
--- a/src/plugin/validate.rs
+++ b/src/plugin/validate.rs
@@ -166,7 +166,13 @@ pub(crate) fn print_plugin_report(
         // schema_version (matches plugins list/audit/search shape).
         // The full report is flattened so existing fields (path,
         // plugin_name, errors, warnings) sit at the same level.
-        let value = crate::envelope::versioned(1, serde_json::to_value(report)?);
+        // The version comes from the named per-command constant rather than a
+        // literal so a future shape change bumps it in the same place as every
+        // other `plugins` envelope.
+        let value = crate::envelope::versioned(
+            super::PLUGINS_VALIDATE_SCHEMA,
+            serde_json::to_value(report)?,
+        );
         println!("{}", serde_json::to_string_pretty(&value)?);
     } else if report.errors.is_empty() && report.warnings.is_empty() {
         let name = if report.plugin_name.is_empty() {