diff --git a/app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt b/app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt
index ad9af15..b0cdab9 100644
--- a/app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt
+++ b/app/androidApp/src/main/kotlin/com/example/aiapp/SpawnScreen.kt
@@ -86,7 +86,7 @@ fun SpawnScreen(
     // Only the Claude CLI has models, a working directory, and permission
     // modes; keying the extra fields on the kind rather than the provider
     // name keeps a second Claude provider from needing anything here.
-    val isClaude = current?.kind == "claude-cli"
+    val isClaude = current?.kind == "claude_cli"
 
     Column(Modifier.fillMaxSize().verticalScroll(rememberScrollState()).padding(16.dp)) {
         Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
diff --git a/server/src/config.rs b/server/src/config.rs
index 8a4391e..beb1a15 100644
--- a/server/src/config.rs
+++ b/server/src/config.rs
@@ -143,14 +143,13 @@ pub struct HostConfig {
 /// Which translator runs a session. A new one is a new driver behind the
 /// same trait -- never a branch in shared code.
 ///
-/// The kebab-case spelling is the one the phone compares against
-/// (`SpawnScreen.kt`), so it is the HTTP surface's, not a formatting
-/// choice. The cost lands on the config file, where a hyphen is not an
-/// identifier: RON writes and reads it as `kind: r#claude-cli`. Left that
-/// way rather than renaming the variant, because the string is a contract
-/// with whatever build is installed on the phone and the file is not.
+/// Snake case, which is both Rust's and RON's: this is written into a
+/// config a person edits by hand, and a hyphen is not a RON identifier, so
+/// kebab case cost the file a `kind: r#claude-cli` escape to say a name
+/// nobody would type that way. The same string is what the phone compares
+/// against (`SpawnScreen.kt`), so the two move together.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "kebab-case")]
+#[serde(rename_all = "snake_case")]
 pub enum DriverKind {
     /// The phase-1 fake: echoes messages back as streamed events. Proves
     /// the pipe (spawn, SSE, transcript cursors, questions) with no AI