fix(agents): use runtime names for default_agent to match ordered agent list

src/plugin-handlers/config-handler.test.ts

@@ -3,7 +3,7 @@
 import { describe, test, expect, spyOn, beforeEach, afterEach, mock } from "bun:test"
 import type { CategoryConfig } from "../config/schema"
 import type { OhMyOpenCodeConfig } from "../config"
-import { getAgentDisplayName } from "../shared/agent-display-names"
+import { getAgentDisplayName, getAgentRuntimeName } from "../shared/agent-display-names"
 import { resolveCategoryConfig } from "./category-config-resolver"
 
 import * as agents from "../agents"
@@ -479,7 +479,7 @@ describe("default_agent behavior with Sisyphus orchestration", () => {
     await handler(config)
 
     // then
-    expect(config.default_agent).toBe(getAgentDisplayName("hephaestus"))
+    expect(config.default_agent).toBe(getAgentRuntimeName("hephaestus"))
   })
 
   test("canonicalizes configured default_agent when key uses mixed case", async () => {
@@ -503,7 +503,7 @@ describe("default_agent behavior with Sisyphus orchestration", () => {
     await handler(config)
 
     // then
-    expect(config.default_agent).toBe(getAgentDisplayName("hephaestus"))
+    expect(config.default_agent).toBe(getAgentRuntimeName("hephaestus"))
   })
 
   test("canonicalizes configured default_agent key to display name", async () => {
@@ -527,7 +527,7 @@ describe("default_agent behavior with Sisyphus orchestration", () => {
     await handler(config)
 
     // #then
-    expect(config.default_agent).toBe(getAgentDisplayName("hephaestus"))
+    expect(config.default_agent).toBe(getAgentRuntimeName("hephaestus"))
   })
 
   test("preserves existing display-name default_agent", async () => {
@@ -575,7 +575,31 @@ describe("default_agent behavior with Sisyphus orchestration", () => {
     await handler(config)
 
     // #then
-    expect(config.default_agent).toBe(getAgentDisplayName("sisyphus"))
+    expect(config.default_agent).toBe(getAgentRuntimeName("sisyphus"))
+  })
+
+  test("uses runtime default_agent name so OpenCode matches the emitted ordered agent names", async () => {
+    // given
+    const pluginConfig = createPluginConfig({})
+    const config: Record<string, unknown> = {
+      model: "anthropic/claude-opus-4-6",
+      default_agent: "hephaestus",
+      agent: {},
+    }
+    const handler = createConfigHandler({
+      ctx: { directory: "/tmp" },
+      pluginConfig,
+      modelCacheState: {
+        anthropicContext1MEnabled: false,
+        modelContextLimitsCache: new Map(),
+      },
+    })
+
+    // when
+    await handler(config)
+
+    // then
+    expect(config.default_agent).toBe(getAgentRuntimeName("hephaestus"))
   })
 
   test("sets default_agent to sisyphus when configured default_agent is empty after trim", async () => {
@@ -599,7 +623,7 @@ describe("default_agent behavior with Sisyphus orchestration", () => {
     await handler(config)
 
     // then
-    expect(config.default_agent).toBe(getAgentDisplayName("sisyphus"))
+    expect(config.default_agent).toBe(getAgentRuntimeName("sisyphus"))
   })
 
   test("preserves custom default_agent names while trimming whitespace", async () => {