chore: update GPT-5.2 references to GPT-5.4

Align runtime defaults, tests, docs, and generated artifacts with the newer GPT-5.4 baseline. Keep think-mode and prompt-routing expectations consistent after the model version bump.

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

@@ -656,7 +656,7 @@ describe("Prometheus direct override priority over category", () => {
       },
       categories: {
         "test-planning": {
-          model: "openai/gpt-5.2",
+          model: "openai/gpt-5.4",
           reasoningEffort: "xhigh",
         },
       },
@@ -698,7 +698,7 @@ describe("Prometheus direct override priority over category", () => {
       },
       categories: {
         "reasoning-cat": {
-          model: "openai/gpt-5.2",
+          model: "openai/gpt-5.4",
           reasoningEffort: "high",
         },
       },
@@ -739,7 +739,7 @@ describe("Prometheus direct override priority over category", () => {
       },
       categories: {
         "temp-cat": {
-          model: "openai/gpt-5.2",
+          model: "openai/gpt-5.4",
           temperature: 0.8,
         },
       },
@@ -860,7 +860,7 @@ describe("Plan agent model inheritance from prometheus", () => {
   test("plan agent inherits temperature, reasoningEffort, and other model settings from prometheus", async () => {
     //#given - prometheus configured with category that has temperature and reasoningEffort
     spyOn(shared, "resolveModelPipeline" as any).mockReturnValue({
-      model: "openai/gpt-5.2",
+      model: "openai/gpt-5.4",
       provenance: "override",
       variant: "high",
     })
@@ -871,7 +871,7 @@ describe("Plan agent model inheritance from prometheus", () => {
       },
       agents: {
         prometheus: {
-          model: "openai/gpt-5.2",
+          model: "openai/gpt-5.4",
           variant: "high",
           temperature: 0.3,
           top_p: 0.9,
@@ -902,7 +902,7 @@ describe("Plan agent model inheritance from prometheus", () => {
     const agents = config.agent as Record<string, Record<string, unknown>>
     expect(agents.plan).toBeDefined()
     expect(agents.plan.mode).toBe("subagent")
-    expect(agents.plan.model).toBe("openai/gpt-5.2")
+    expect(agents.plan.model).toBe("openai/gpt-5.4")
     expect(agents.plan.variant).toBe("high")
     expect(agents.plan.temperature).toBe(0.3)
     expect(agents.plan.top_p).toBe(0.9)
@@ -913,7 +913,7 @@ describe("Plan agent model inheritance from prometheus", () => {
   })
 
   test("plan agent user override takes priority over prometheus inherited settings", async () => {
-    //#given - prometheus resolves to opus, but user has plan override for gpt-5.2
+    //#given - prometheus resolves to opus, but user has plan override for gpt-5.4
     spyOn(shared, "resolveModelPipeline" as any).mockReturnValue({
       model: "anthropic/claude-opus-4-6",
       provenance: "provider-fallback",
@@ -926,7 +926,7 @@ describe("Plan agent model inheritance from prometheus", () => {
       },
       agents: {
         plan: {
-          model: "openai/gpt-5.2",
+          model: "openai/gpt-5.4",
           variant: "high",
           temperature: 0.5,
         },
@@ -950,7 +950,7 @@ describe("Plan agent model inheritance from prometheus", () => {
 
     //#then - plan uses its own override, not prometheus settings
     const agents = config.agent as Record<string, Record<string, unknown>>
-    expect(agents.plan.model).toBe("openai/gpt-5.2")
+    expect(agents.plan.model).toBe("openai/gpt-5.4")
     expect(agents.plan.variant).toBe("high")
     expect(agents.plan.temperature).toBe(0.5)
   })

src/plugin-handlers/plan-model-inheritance.test.ts

@@ -64,7 +64,7 @@ describe("buildPlanDemoteConfig", () => {
       reasoningEffort: "high",
     }
     const planOverride = {
-      model: "openai/gpt-5.2",
+      model: "openai/gpt-5.4",
       variant: "high",
       temperature: 0.5,
       reasoningEffort: "low",
@@ -74,7 +74,7 @@ describe("buildPlanDemoteConfig", () => {
     const result = buildPlanDemoteConfig(prometheusConfig, planOverride)
 
     //#then
-    expect(result.model).toBe("openai/gpt-5.2")
+    expect(result.model).toBe("openai/gpt-5.4")
     expect(result.variant).toBe("high")
     expect(result.temperature).toBe(0.5)
     expect(result.reasoningEffort).toBe("low")
@@ -89,14 +89,14 @@ describe("buildPlanDemoteConfig", () => {
       reasoningEffort: "high",
     }
     const planOverride = {
-      model: "openai/gpt-5.2",
+      model: "openai/gpt-5.4",
     }
 
     //#when
     const result = buildPlanDemoteConfig(prometheusConfig, planOverride)
 
     //#then - plan model wins, rest inherits from prometheus
-    expect(result.model).toBe("openai/gpt-5.2")
+    expect(result.model).toBe("openai/gpt-5.4")
     expect(result.variant).toBe("max")
     expect(result.temperature).toBe(0.1)
     expect(result.reasoningEffort).toBe("high")