fix: address PR review feedback

- Prioritize 'latest', 'beta', 'next' tags in getPluginNameWithVersion()
  to ensure deterministic results when version matches multiple tags
- Add 5s timeout to fetchNpmDistTags() to prevent blocking on slow networks
- Remove unused 'join' import from node:path
- Merge upstream/dev and resolve conflicts in config-manager.test.ts

src/cli/config-manager.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test, mock, beforeEach, afterEach } from "bun:test"
 
-import { ANTIGRAVITY_PROVIDER_CONFIG, getPluginNameWithVersion, fetchNpmDistTags } from "./config-manager"
+import { ANTIGRAVITY_PROVIDER_CONFIG, getPluginNameWithVersion, fetchNpmDistTags, generateOmoConfig } from "./config-manager"
+import type { InstallConfig } from "./types"
 
 describe("getPluginNameWithVersion", () => {
   const originalFetch = globalThis.fetch
@@ -99,6 +100,22 @@ describe("getPluginNameWithVersion", () => {
     // #then should fall back to pinned version
     expect(result).toBe("oh-my-opencode@2.14.0")
   })
+
+  test("prioritizes latest over other tags when version matches multiple", async () => {
+    // #given version matches both latest and beta (during release promotion)
+    globalThis.fetch = mock(() =>
+      Promise.resolve({
+        ok: true,
+        json: () => Promise.resolve({ beta: "3.0.0", latest: "3.0.0", next: "3.1.0-alpha.1" }),
+      } as Response)
+    ) as unknown as typeof fetch
+
+    // #when current version matches both
+    const result = await getPluginNameWithVersion("3.0.0")
+
+    // #then should prioritize @latest
+    expect(result).toBe("oh-my-opencode@latest")
+  })
 })
 
 describe("fetchNpmDistTags", () => {
@@ -182,3 +199,133 @@ describe("config-manager ANTIGRAVITY_PROVIDER_CONFIG", () => {
     }
   })
 })
+
+describe("generateOmoConfig - GitHub Copilot fallback", () => {
+  test("frontend-ui-ux-engineer uses Copilot when no native providers", () => {
+    // #given user has only Copilot (no Claude, ChatGPT, Gemini)
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then frontend-ui-ux-engineer should use Copilot Gemini
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["frontend-ui-ux-engineer"]?.model).toBe("github-copilot/gemini-3-pro-preview")
+  })
+
+  test("document-writer uses Copilot when no native providers", () => {
+    // #given user has only Copilot
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then document-writer should use Copilot Gemini Flash
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["document-writer"]?.model).toBe("github-copilot/gemini-3-flash-preview")
+  })
+
+  test("multimodal-looker uses Copilot when no native providers", () => {
+    // #given user has only Copilot
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then multimodal-looker should use Copilot Gemini Flash
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["multimodal-looker"]?.model).toBe("github-copilot/gemini-3-flash-preview")
+  })
+
+  test("explore uses Copilot grok-code when no native providers", () => {
+    // #given user has only Copilot
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then explore should use Copilot Grok
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["explore"]?.model).toBe("github-copilot/grok-code-fast-1")
+  })
+
+  test("native Gemini takes priority over Copilot for frontend-ui-ux-engineer", () => {
+    // #given user has both Gemini and Copilot
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: true,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then native Gemini should be used (NOT Copilot)
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["frontend-ui-ux-engineer"]?.model).toBe("google/antigravity-gemini-3-pro-high")
+  })
+
+  test("native Claude takes priority over Copilot for frontend-ui-ux-engineer", () => {
+    // #given user has Claude and Copilot but no Gemini
+    const config: InstallConfig = {
+      hasClaude: true,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then native Claude should be used (NOT Copilot)
+    const agents = result.agents as Record<string, { model?: string }>
+    expect(agents["frontend-ui-ux-engineer"]?.model).toBe("anthropic/claude-opus-4-5")
+  })
+
+  test("categories use Copilot models when no native Gemini", () => {
+    // #given user has Copilot but no Gemini
+    const config: InstallConfig = {
+      hasClaude: false,
+      isMax20: false,
+      hasChatGPT: false,
+      hasGemini: false,
+      hasCopilot: true,
+    }
+
+    // #when generating config
+    const result = generateOmoConfig(config)
+
+    // #then categories should use Copilot models
+    const categories = result.categories as Record<string, { model?: string }>
+    expect(categories?.["visual-engineering"]?.model).toBe("github-copilot/gemini-3-pro-preview")
+    expect(categories?.["artistry"]?.model).toBe("github-copilot/gemini-3-pro-preview")
+    expect(categories?.["writing"]?.model).toBe("github-copilot/gemini-3-flash-preview")
+  })
+})