diff --git a/src/cli/__snapshots__/model-fallback.test.ts.snap b/src/cli/__snapshots__/model-fallback.test.ts.snap
index b412674c..7f94aa82 100644
--- a/src/cli/__snapshots__/model-fallback.test.ts.snap
+++ b/src/cli/__snapshots__/model-fallback.test.ts.snap
@@ -702,10 +702,10 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models when
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   "agents": {
     "Atlas": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "Metis (Plan Consultant)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Momus (Plan Reviewer)": {
@@ -713,17 +713,17 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models when
       "variant": "medium",
     },
     "Prometheus (Planner)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Sisyphus": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "explore": {
       "model": "opencode/grok-code",
     },
     "librarian": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "multimodal-looker": {
       "model": "github-copilot/gemini-3-flash-preview",
@@ -739,17 +739,17 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models when
       "variant": "max",
     },
     "quick": {
-      "model": "github-copilot/claude-haiku-4-5",
+      "model": "github-copilot/claude-haiku-4.5",
     },
     "ultrabrain": {
       "model": "github-copilot/gpt-5.2-codex",
       "variant": "xhigh",
     },
     "unspecified-high": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "unspecified-low": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "visual-engineering": {
       "model": "github-copilot/gemini-3-pro-preview",
@@ -766,10 +766,10 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models with
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   "agents": {
     "Atlas": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "Metis (Plan Consultant)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Momus (Plan Reviewer)": {
@@ -777,18 +777,18 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models with
       "variant": "medium",
     },
     "Prometheus (Planner)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Sisyphus": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "explore": {
       "model": "opencode/grok-code",
     },
     "librarian": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "multimodal-looker": {
       "model": "github-copilot/gemini-3-flash-preview",
@@ -804,18 +804,18 @@ exports[`generateModelConfig fallback providers uses GitHub Copilot models with
       "variant": "max",
     },
     "quick": {
-      "model": "github-copilot/claude-haiku-4-5",
+      "model": "github-copilot/claude-haiku-4.5",
     },
     "ultrabrain": {
       "model": "github-copilot/gpt-5.2-codex",
       "variant": "xhigh",
     },
     "unspecified-high": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "unspecified-low": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "visual-engineering": {
       "model": "github-copilot/gemini-3-pro-preview",
@@ -1012,10 +1012,10 @@ exports[`generateModelConfig mixed provider scenarios uses OpenAI + Copilot comb
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   "agents": {
     "Atlas": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "Metis (Plan Consultant)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Momus (Plan Reviewer)": {
@@ -1023,17 +1023,17 @@ exports[`generateModelConfig mixed provider scenarios uses OpenAI + Copilot comb
       "variant": "medium",
     },
     "Prometheus (Planner)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Sisyphus": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "explore": {
       "model": "opencode/grok-code",
     },
     "librarian": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "multimodal-looker": {
       "model": "github-copilot/gemini-3-flash-preview",
@@ -1049,17 +1049,17 @@ exports[`generateModelConfig mixed provider scenarios uses OpenAI + Copilot comb
       "variant": "max",
     },
     "quick": {
-      "model": "github-copilot/claude-haiku-4-5",
+      "model": "github-copilot/claude-haiku-4.5",
     },
     "ultrabrain": {
       "model": "openai/gpt-5.2-codex",
       "variant": "xhigh",
     },
     "unspecified-high": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "unspecified-low": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "visual-engineering": {
       "model": "github-copilot/gemini-3-pro-preview",
@@ -1203,10 +1203,10 @@ exports[`generateModelConfig mixed provider scenarios uses all fallback provider
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
   "agents": {
     "Atlas": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "Metis (Plan Consultant)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Momus (Plan Reviewer)": {
@@ -1214,11 +1214,11 @@ exports[`generateModelConfig mixed provider scenarios uses all fallback provider
       "variant": "medium",
     },
     "Prometheus (Planner)": {
-      "model": "github-copilot/claude-opus-4-5",
+      "model": "github-copilot/claude-opus-4.5",
       "variant": "max",
     },
     "Sisyphus": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "explore": {
       "model": "opencode/grok-code",
@@ -1240,17 +1240,17 @@ exports[`generateModelConfig mixed provider scenarios uses all fallback provider
       "variant": "max",
     },
     "quick": {
-      "model": "github-copilot/claude-haiku-4-5",
+      "model": "github-copilot/claude-haiku-4.5",
     },
     "ultrabrain": {
       "model": "github-copilot/gpt-5.2-codex",
       "variant": "xhigh",
     },
     "unspecified-high": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "unspecified-low": {
-      "model": "github-copilot/claude-sonnet-4-5",
+      "model": "github-copilot/claude-sonnet-4.5",
     },
     "visual-engineering": {
       "model": "github-copilot/gemini-3-pro-preview",