refactor(core): refine layer node replacements (#34377)

packages/opencode/test/session/processor-effect.test.ts

@@ -176,12 +176,12 @@ const root = LayerNode.group([
   CrossSpawnSpawner.node,
 ])
 const replacements = [
-  LayerNode.replace(SessionSummary.layer, summary),
-  LayerNode.replace(RuntimeFlags.defaultLayer, RuntimeFlags.layer({ experimentalEventSystem: true })),
-]
+  [SessionSummary.node, summary],
+  [RuntimeFlags.node, RuntimeFlags.layer({ experimentalEventSystem: true })],
+] as const
 const env = LayerNode.compile(
   LayerNode.group([root, LayerNode.make({ service: TestLLMServer, layer: TestLLMServer.layer, deps: [] })]),
-  new Map(replacements.map((item) => [item.source, item.replacement])),
+  replacements,
 )
 
 const it = testEffect(env)
@@ -208,9 +208,7 @@ const providerErrorLLM = Layer.succeed(
 )
 const providerErrorEnv = LayerNode.compile(
   root,
-  new Map(
-    [...replacements, LayerNode.replace(LLM.layer, providerErrorLLM)].map((item) => [item.source, item.replacement]),
-  ),
+  [...replacements, [LLM.node, providerErrorLLM]],
 )
 const itProviderError = testEffect(providerErrorEnv)
 
@@ -230,9 +228,7 @@ const fragmentFailureLLM = Layer.succeed(
 )
 const fragmentFailureEnv = LayerNode.compile(
   root,
-  new Map(
-    [...replacements, LayerNode.replace(LLM.layer, fragmentFailureLLM)].map((item) => [item.source, item.replacement]),
-  ),
+  [...replacements, [LLM.node, fragmentFailureLLM]],
 )
 const itFragmentFailure = testEffect(fragmentFailureEnv)
 

packages/opencode/test/session/snapshot-tool-race.test.ts

@@ -89,13 +89,11 @@ const root = LayerNode.group([
 const it = testEffect(
   LayerNode.compile(
     root,
-    new Map(
-      [
-        LayerNode.replace(MCP.layer, mcp),
-        LayerNode.replace(LSP.layer, lsp),
-        LayerNode.replace(RuntimeFlags.defaultLayer, RuntimeFlags.layer({ experimentalEventSystem: true })),
-      ].map((item) => [item.source, item.replacement]),
-    ),
+    [
+      [MCP.node, mcp],
+      [LSP.node, lsp],
+      [RuntimeFlags.node, RuntimeFlags.layer({ experimentalEventSystem: true })],
+    ],
   ),
 )