From 4a8bcfb8872404e5ffa6e0ce60c8b7b2b14c028a Mon Sep 17 00:00:00 2001
From: Julius Marminge <51714798+juliusmarminge@users.noreply.github.com>
Date: Sun, 25 Oct 2026 15:10:40 -0700
Subject: [PATCH] chore(lint): enforce schemaStructWithTag

---
 packages/effect-acp/src/agent.test.ts  | 5 +----
 packages/effect-acp/src/client.test.ts | 5 +----
 tsconfig.base.json                     | 1 +
 3 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/packages/effect-acp/src/agent.test.ts b/packages/effect-acp/src/agent.test.ts
index 95f9e2ec2f1dd..47211d54b2b84 100644
--- a/packages/effect-acp/src/agent.test.ts
+++ b/packages/effect-acp/src/agent.test.ts
@@ -37,10 +37,7 @@ const ExtRequest = jsonRpcRequest("x/test", Schema.Struct({ hello: Schema.String
 const ExtResponse = jsonRpcResponse(Schema.Struct({ ok: Schema.Boolean }));
 const DieResponse = Schema.Struct({
   id: Schema.Number,
-  error: Schema.Struct({
-    _tag: Schema.Literal("Cause"),
-    data: Schema.Tuple([Schema.Struct({ _tag: Schema.Literal("Die") })]),
-  }),
+  error: Schema.TaggedStruct("Cause", { data: Schema.Tuple([Schema.TaggedStruct("Die", {})]) }),
 });
 const decodeRequestPermissionRequest = Schema.decodeEffect(
   Schema.fromJsonString(RequestPermissionRequest),
diff --git a/packages/effect-acp/src/client.test.ts b/packages/effect-acp/src/client.test.ts
index 8dcf23b7272a2..71f00c0f71b3c 100644
--- a/packages/effect-acp/src/client.test.ts
+++ b/packages/effect-acp/src/client.test.ts
@@ -53,10 +53,7 @@ const PermissionResponse = jsonRpcResponse(AcpSchema.RequestPermissionResponse);
 const ErrorResponse = Schema.Struct({ id: Schema.String, error: Schema.Unknown });
 const DieResponse = Schema.Struct({
   id: Schema.String,
-  error: Schema.Struct({
-    _tag: Schema.Literal("Cause"),
-    data: Schema.Tuple([Schema.Struct({ _tag: Schema.Literal("Die") })]),
-  }),
+  error: Schema.TaggedStruct("Cause", { data: Schema.Tuple([Schema.TaggedStruct("Die", {})]) }),
 });
 const decodePromptRequestLine = Schema.decodeEffect(Schema.fromJsonString(PromptRequest));
 const XAiPromptCompleteNotification = jsonRpcNotification(
diff --git a/tsconfig.base.json b/tsconfig.base.json
index 1dfdbd6634245..f6d10a4182247 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -24,6 +24,7 @@
         "namespaceImportPackages": ["@effect/platform-node", "effect"],
         "effectFn": ["span", "inferred-span", "suggested-span"],
         "diagnosticSeverity": {
+          "schemaStructWithTag": "error",
           "preferTypedSchemaDecoder": "error",
           "catchUnfailableEffect": "error",
           "raceFirstWithSleepToTimeout": "error",