feat(multimodal-looker): prioritize gpt-5.3-codex medium over gemini in fallback chain

src/cli/__snapshots__/model-fallback.test.ts.snap

@@ -212,7 +212,8 @@ exports[`generateModelConfig single native provider uses OpenAI models when only
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -279,7 +280,8 @@ exports[`generateModelConfig single native provider uses OpenAI models with isMa
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -468,7 +470,8 @@ exports[`generateModelConfig all native providers uses preferred models from fal
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "google/gemini-3-flash-preview",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -542,7 +545,8 @@ exports[`generateModelConfig all native providers uses preferred models with isM
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "google/gemini-3-flash-preview",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -617,7 +621,8 @@ exports[`generateModelConfig fallback providers uses OpenCode Zen models when on
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "opencode/gemini-3-flash",
+      "model": "opencode/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "opencode/gpt-5.2",
@@ -691,7 +696,8 @@ exports[`generateModelConfig fallback providers uses OpenCode Zen models with is
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "opencode/gemini-3-flash",
+      "model": "opencode/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "opencode/gpt-5.2",
@@ -1009,7 +1015,8 @@ exports[`generateModelConfig mixed provider scenarios uses Claude + OpenCode Zen
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "opencode/gemini-3-flash",
+      "model": "opencode/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "opencode/gpt-5.2",
@@ -1083,7 +1090,8 @@ exports[`generateModelConfig mixed provider scenarios uses OpenAI + Copilot comb
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "github-copilot/gemini-3-flash-preview",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -1284,7 +1292,8 @@ exports[`generateModelConfig mixed provider scenarios uses all fallback provider
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "github-copilot/gemini-3-flash-preview",
+      "model": "opencode/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "github-copilot/gpt-5.2",
@@ -1358,7 +1367,8 @@ exports[`generateModelConfig mixed provider scenarios uses all providers togethe
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "google/gemini-3-flash-preview",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",
@@ -1432,7 +1442,8 @@ exports[`generateModelConfig mixed provider scenarios uses all providers with is
       "variant": "medium",
     },
     "multimodal-looker": {
-      "model": "google/gemini-3-flash-preview",
+      "model": "openai/gpt-5.3-codex",
+      "variant": "medium",
     },
     "oracle": {
       "model": "openai/gpt-5.2",

src/cli/config-manager.test.ts

@@ -324,7 +324,7 @@ describe("generateOmoConfig - model fallback system", () => {
     // #then Oracle should use native OpenAI (first fallback entry)
     expect((result.agents as Record<string, { model: string }>).oracle.model).toBe("openai/gpt-5.2")
     // #then multimodal-looker should use native OpenAI (fallback within native tier)
-    expect((result.agents as Record<string, { model: string }>)["multimodal-looker"].model).toBe("openai/gpt-5.2")
+    expect((result.agents as Record<string, { model: string }>)["multimodal-looker"].model).toBe("openai/gpt-5.3-codex")
   })
 
   test("uses haiku for explore when Claude max20", () => {

src/cli/model-fallback-requirements.ts

@@ -44,8 +44,8 @@ export const CLI_AGENT_MODEL_REQUIREMENTS: Record<string, ModelRequirement> = {
   },
   "multimodal-looker": {
     fallbackChain: [
+      { providers: ["openai", "opencode"], model: "gpt-5.3-codex", variant: "medium" },
       { providers: ["google", "github-copilot", "opencode"], model: "gemini-3-flash" },
-      { providers: ["openai", "github-copilot", "opencode"], model: "gpt-5.2" },
       { providers: ["zai-coding-plan"], model: "glm-4.6v" },
       { providers: ["kimi-for-coding"], model: "k2p5" },
       { providers: ["opencode"], model: "kimi-k2.5-free" },

src/shared/model-requirements.test.ts

@@ -86,19 +86,23 @@ describe("AGENT_MODEL_REQUIREMENTS", () => {
     expect(quaternary.model).toBe("gpt-5-nano")
   })
 
-  test("multimodal-looker has valid fallbackChain with kimi-k2.5-free as primary", () => {
+  test("multimodal-looker has valid fallbackChain with gpt-5.3-codex as primary", () => {
     // given - multimodal-looker agent requirement
     const multimodalLooker = AGENT_MODEL_REQUIREMENTS["multimodal-looker"]
 
     // when - accessing multimodal-looker requirement
-    // then - fallbackChain exists with kimi-k2.5-free first, gpt-5-nano last
+    // then - fallbackChain exists with gpt-5.3-codex first, gemini second, gpt-5-nano last
     expect(multimodalLooker).toBeDefined()
     expect(multimodalLooker.fallbackChain).toBeArray()
     expect(multimodalLooker.fallbackChain).toHaveLength(5)
 
     const primary = multimodalLooker.fallbackChain[0]
-    expect(primary.providers[0]).toBe("opencode")
-    expect(primary.model).toBe("kimi-k2.5-free")
+    expect(primary.providers).toEqual(["openai", "opencode"])
+    expect(primary.model).toBe("gpt-5.3-codex")
+    expect(primary.variant).toBe("medium")
+
+    const secondary = multimodalLooker.fallbackChain[1]
+    expect(secondary.model).toBe("gemini-3-flash")
 
     const last = multimodalLooker.fallbackChain[4]
     expect(last.providers).toEqual(["openai", "github-copilot", "opencode"])

src/shared/model-requirements.ts

@@ -53,9 +53,9 @@ export const AGENT_MODEL_REQUIREMENTS: Record<string, ModelRequirement> = {
   },
   "multimodal-looker": {
     fallbackChain: [
-      { providers: ["opencode"], model: "kimi-k2.5-free" },
+      { providers: ["openai", "opencode"], model: "gpt-5.3-codex", variant: "medium" },
       { providers: ["google", "github-copilot", "opencode"], model: "gemini-3-flash" },
-      { providers: ["openai", "github-copilot", "opencode"], model: "gpt-5.2" },
+      { providers: ["opencode"], model: "kimi-k2.5-free" },
       { providers: ["zai-coding-plan"], model: "glm-4.6v" },
       { providers: ["openai", "github-copilot", "opencode"], model: "gpt-5-nano" },
     ],