stricter checks

tests/fixtures/native-agents-plugin.ts

@@ -10,13 +10,13 @@ export default Plugin.define({
             const providerID = Provider.ID.make("fixture");
             yield* context.provider.transform((editor) =>
                 editor.add({
-                    info: {
-                        ...Provider.Info.empty(providerID),
+                    // Copy own fields like the former spread; the editor accepts plain info.
+                    info: Object.assign({}, Provider.Info.empty(providerID), {
                         name: "Isolated fixture",
-                        activation: "enabled",
+                        activation: "enabled" as const,
                         package: "@opencode/ai/providers/openai-compatible",
-                        settings: { baseURL: process.env.FIXTURE_MODEL_URL! },
-                    },
+                        settings: { baseURL: process.env["FIXTURE_MODEL_URL"] ?? "" },
+                    }),
                     models: ["gpt-6-luna", "gpt-6.1-sol", "gpt-6-astra"].map((id) =>
                         Model.Info.default(providerID, Model.ID.make(id)),
                     ),

tests/fixtures/native-host-plugin.ts

@@ -37,7 +37,7 @@ export default Plugin.define({
                     const child = yield* context.session.get({ sessionID: event.sessionID });
                     yield* Effect.promise(() =>
                         appendFile(
-                            process.env.FIXTURE_TRACE!,
+                            process.env["FIXTURE_TRACE"] ?? "",
                             JSON.stringify({
                                 id: child.id,
                                 parent: child.parentID,
@@ -59,7 +59,7 @@ export default Plugin.define({
                                     description: "native host proof",
                                     prompt: "Reply with FIXTURE_COMPLETE",
                                     background: input.background,
-                                    ...(input.child
+                                    ...(input.child !== undefined && input.child !== ""
                                         ? { sessionID: input.child }
                                         : {
                                               worktree: {