fix: remove hardcoded model defaults from categories and agents

BREAKING CHANGE: Model resolution overhauled

- Created centralized model-resolver.ts with priority chain:
  userModel → inheritedModel → systemDefaultModel
- Removed model field from all 7 DEFAULT_CATEGORIES entries
- Removed DEFAULT_MODEL constants from 10 agents
- Removed singleton agent exports (use factories instead)
- Made CategoryConfigSchema.model optional
- CLI no longer generates model overrides
- Empty strings treated as unset (uses fallback)

Users must now:
1. Use factory functions (createOracleAgent, etc.) instead of singletons
2. Provide model explicitly or use systemDefaultModel
3. Configure category models explicitly if needed

Fixes model fallback bug where hardcoded defaults overrode
user's OpenCode configured model.

src/cli/config-manager.test.ts

@@ -200,85 +200,32 @@ 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)
+describe("generateOmoConfig - v3 beta: no hardcoded models", () => {
+  test("generates minimal config with only $schema", () => {
+    // #given any install config
     const config: InstallConfig = {
-      hasClaude: false,
+      hasClaude: true,
       isMax20: false,
-      hasChatGPT: false,
+      hasChatGPT: true,
       hasGemini: false,
-      hasCopilot: true,
+      hasCopilot: false,
     }
 
     // #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")
+    // #then should only contain $schema, no agents or categories
+    expect(result.$schema).toBe("https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json")
+    expect(result.agents).toBeUndefined()
+    expect(result.categories).toBeUndefined()
   })
 
-  test("document-writer uses Copilot when no native providers", () => {
-    // #given user has only Copilot
+  test("does not include model fields regardless of provider config", () => {
+    // #given user has multiple providers
     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,
+      hasClaude: true,
+      isMax20: true,
+      hasChatGPT: true,
       hasGemini: true,
       hasCopilot: true,
     }
@@ -286,46 +233,27 @@ describe("generateOmoConfig - GitHub Copilot fallback", () => {
     // #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")
+    // #then should not have agents or categories with model fields
+    expect(result.agents).toBeUndefined()
+    expect(result.categories).toBeUndefined()
   })
 
-  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
+  test("does not include model fields when no providers configured", () => {
+    // #given user has no providers
     const config: InstallConfig = {
       hasClaude: false,
       isMax20: false,
       hasChatGPT: false,
       hasGemini: false,
-      hasCopilot: true,
+      hasCopilot: false,
     }
 
     // #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")
+    // #then should still only contain $schema
+    expect(result.$schema).toBe("https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json")
+    expect(result.agents).toBeUndefined()
+    expect(result.categories).toBeUndefined()
   })
 })

src/cli/config-manager.ts

@@ -306,79 +306,13 @@ function deepMerge<T extends Record<string, unknown>>(target: T, source: Partial
   return result
 }
 
-export function generateOmoConfig(installConfig: InstallConfig): Record<string, unknown> {
+export function generateOmoConfig(_installConfig: InstallConfig): Record<string, unknown> {
+  // v3 beta: No hardcoded model strings - users rely on their OpenCode configured model
+  // Users who want specific models configure them explicitly after install
   const config: Record<string, unknown> = {
     $schema: "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   }
 
-  const agents: Record<string, Record<string, unknown>> = {}
-
-  if (!installConfig.hasClaude) {
-    agents["Sisyphus"] = {
-      model: installConfig.hasCopilot ? "github-copilot/claude-opus-4.5" : "opencode/glm-4.7-free",
-    }
-  }
-
-  agents["librarian"] = { model: "opencode/glm-4.7-free" }
-
-  // Gemini models use `antigravity-` prefix for explicit Antigravity quota routing
-  // @see ANTIGRAVITY_PROVIDER_CONFIG comments for rationale
-  if (installConfig.hasGemini) {
-    agents["explore"] = { model: "google/antigravity-gemini-3-flash" }
-  } else if (installConfig.hasClaude && installConfig.isMax20) {
-    agents["explore"] = { model: "anthropic/claude-haiku-4-5" }
-  } else if (installConfig.hasCopilot) {
-    agents["explore"] = { model: "github-copilot/grok-code-fast-1" }
-  } else {
-    agents["explore"] = { model: "opencode/glm-4.7-free" }
-  }
-
-  if (!installConfig.hasChatGPT) {
-    const oracleFallback = installConfig.hasCopilot
-      ? "github-copilot/gpt-5.2"
-      : installConfig.hasClaude
-        ? "anthropic/claude-opus-4-5"
-        : "opencode/glm-4.7-free"
-    agents["oracle"] = { model: oracleFallback }
-  }
-
-  if (installConfig.hasGemini) {
-    agents["frontend-ui-ux-engineer"] = { model: "google/antigravity-gemini-3-pro-high" }
-    agents["document-writer"] = { model: "google/antigravity-gemini-3-flash" }
-    agents["multimodal-looker"] = { model: "google/antigravity-gemini-3-flash" }
-  } else if (installConfig.hasClaude) {
-    agents["frontend-ui-ux-engineer"] = { model: "anthropic/claude-opus-4-5" }
-    agents["document-writer"] = { model: "anthropic/claude-opus-4-5" }
-    agents["multimodal-looker"] = { model: "anthropic/claude-opus-4-5" }
-  } else if (installConfig.hasCopilot) {
-    agents["frontend-ui-ux-engineer"] = { model: "github-copilot/gemini-3-pro-preview" }
-    agents["document-writer"] = { model: "github-copilot/gemini-3-flash-preview" }
-    agents["multimodal-looker"] = { model: "github-copilot/gemini-3-flash-preview" }
-  } else {
-    agents["frontend-ui-ux-engineer"] = { model: "opencode/glm-4.7-free" }
-    agents["document-writer"] = { model: "opencode/glm-4.7-free" }
-    agents["multimodal-looker"] = { model: "opencode/glm-4.7-free" }
-  }
-
-  if (Object.keys(agents).length > 0) {
-    config.agents = agents
-  }
-
-  // Categories: override model for Antigravity auth or GitHub Copilot fallback
-  if (installConfig.hasGemini) {
-    config.categories = {
-      "visual-engineering": { model: "google/gemini-3-pro-high" },
-      artistry: { model: "google/gemini-3-pro-high" },
-      writing: { model: "google/gemini-3-flash-high" },
-    }
-  } else if (installConfig.hasCopilot) {
-    config.categories = {
-      "visual-engineering": { model: "github-copilot/gemini-3-pro-preview" },
-      artistry: { model: "github-copilot/gemini-3-pro-preview" },
-      writing: { model: "github-copilot/gemini-3-flash-preview" },
-    }
-  }
-
   return config
 }
 
@@ -646,11 +580,9 @@ export function addProviderConfig(config: InstallConfig): ConfigMergeResult {
   }
 }
 
-interface OmoConfigData {
-  agents?: Record<string, { model?: string }>
-}
-
 export function detectCurrentConfig(): DetectedConfig {
+  // v3 beta: Since we no longer generate hardcoded model strings,
+  // detection only checks for plugin installation and Gemini auth plugin
   const result: DetectedConfig = {
     isInstalled: false,
     hasClaude: true,
@@ -678,53 +610,8 @@ export function detectCurrentConfig(): DetectedConfig {
     return result
   }
 
+  // Gemini auth plugin detection still works via plugin presence
   result.hasGemini = plugins.some((p) => p.startsWith("opencode-antigravity-auth"))
 
-  const omoConfigPath = getOmoConfig()
-  if (!existsSync(omoConfigPath)) {
-    return result
-  }
-
-  try {
-    const stat = statSync(omoConfigPath)
-    if (stat.size === 0) {
-      return result
-    }
-
-    const content = readFileSync(omoConfigPath, "utf-8")
-    if (isEmptyOrWhitespace(content)) {
-      return result
-    }
-
-    const omoConfig = parseJsonc<OmoConfigData>(content)
-    if (!omoConfig || typeof omoConfig !== "object") {
-      return result
-    }
-
-    const agents = omoConfig.agents ?? {}
-
-    if (agents["Sisyphus"]?.model === "opencode/glm-4.7-free") {
-      result.hasClaude = false
-      result.isMax20 = false
-    } else if (agents["librarian"]?.model === "opencode/glm-4.7-free") {
-      result.hasClaude = true
-      result.isMax20 = false
-    }
-
-    if (agents["oracle"]?.model?.startsWith("anthropic/")) {
-      result.hasChatGPT = false
-    } else if (agents["oracle"]?.model === "opencode/glm-4.7-free") {
-      result.hasChatGPT = false
-    }
-
-    const hasAnyCopilotModel = Object.values(agents).some(
-      (agent) => agent?.model?.startsWith("github-copilot/")
-    )
-    result.hasCopilot = hasAnyCopilotModel
-
-  } catch {
-    /* intentionally empty - malformed omo config returns defaults from opencode config detection */
-  }
-
   return result
 }

src/cli/install.ts

@@ -47,18 +47,11 @@ function formatConfigSummary(config: InstallConfig): string {
   lines.push(color.dim("─".repeat(40)))
   lines.push("")
 
-  lines.push(color.bold(color.white("Agent Configuration")))
+  // v3 beta: No hardcoded models - agents use OpenCode's configured default model
+  lines.push(color.bold(color.white("Agent Models")))
   lines.push("")
-
-  const sisyphusModel = config.hasClaude ? "claude-opus-4-5" : (config.hasCopilot ? "github-copilot/claude-opus-4.5" : "glm-4.7-free")
-  const oracleModel = config.hasChatGPT ? "gpt-5.2" : (config.hasCopilot ? "github-copilot/gpt-5.2" : (config.hasClaude ? "claude-opus-4-5" : "glm-4.7-free"))
-  const librarianModel = "glm-4.7-free"
-  const frontendModel = config.hasGemini ? "antigravity-gemini-3-pro-high" : (config.hasClaude ? "claude-opus-4-5" : "glm-4.7-free")
-
-  lines.push(`  ${SYMBOLS.bullet} Sisyphus     ${SYMBOLS.arrow} ${color.cyan(sisyphusModel)}`)
-  lines.push(`  ${SYMBOLS.bullet} Oracle       ${SYMBOLS.arrow} ${color.cyan(oracleModel)}`)
-  lines.push(`  ${SYMBOLS.bullet} Librarian    ${SYMBOLS.arrow} ${color.cyan(librarianModel)}`)
-  lines.push(`  ${SYMBOLS.bullet} Frontend     ${SYMBOLS.arrow} ${color.cyan(frontendModel)}`)
+  lines.push(`  ${SYMBOLS.info} Agents will use your OpenCode default model`)
+  lines.push(`  ${SYMBOLS.bullet} Configure specific models in ${color.cyan("oh-my-opencode.json")} if needed`)
 
   return lines.join("\n")
 }