diff --git a/bun.lock b/bun.lock
index da4ae3ea3..8d6efb3f1 100644
--- a/bun.lock
+++ b/bun.lock
@@ -21,7 +21,7 @@
     },
     "packages/agent": {
       "name": "@oh-my-pi/pi-agent-core",
-      "version": "4.9.0",
+      "version": "5.0.0",
       "dependencies": {
         "@oh-my-pi/pi-ai": "workspace:*",
         "@oh-my-pi/pi-tui": "workspace:*",
@@ -33,7 +33,7 @@
     },
     "packages/ai": {
       "name": "@oh-my-pi/pi-ai",
-      "version": "4.9.0",
+      "version": "5.0.0",
       "bin": {
         "pi-ai": "./src/cli.ts",
       },
@@ -59,7 +59,7 @@
     },
     "packages/coding-agent": {
       "name": "@oh-my-pi/pi-coding-agent",
-      "version": "4.9.0",
+      "version": "5.0.0",
       "bin": {
         "omp": "src/cli.ts",
       },
@@ -100,7 +100,7 @@
     },
     "packages/git-tool": {
       "name": "@oh-my-pi/pi-git-tool",
-      "version": "4.9.0",
+      "version": "5.0.0",
       "devDependencies": {
         "@types/node": "^24.3.0",
         "vitest": "^3.2.4",
@@ -108,7 +108,7 @@
     },
     "packages/tui": {
       "name": "@oh-my-pi/pi-tui",
-      "version": "4.9.0",
+      "version": "5.0.0",
       "dependencies": {
         "@types/mime-types": "^2.1.4",
         "chalk": "^5.5.0",
diff --git a/packages/agent/CHANGELOG.md b/packages/agent/CHANGELOG.md
index 5a2d18708..007195a69 100644
--- a/packages/agent/CHANGELOG.md
+++ b/packages/agent/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [5.0.0] - 2026-01-12
+
 ## [4.9.0] - 2026-01-12
 
 ## [4.8.3] - 2026-01-12
diff --git a/packages/agent/package.json b/packages/agent/package.json
index 47a698141..00b3ce03a 100644
--- a/packages/agent/package.json
+++ b/packages/agent/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@oh-my-pi/pi-agent-core",
-	"version": "4.9.0",
+	"version": "5.0.0",
 	"description": "General-purpose agent with transport abstraction, state management, and attachment support",
 	"type": "module",
 	"main": "./src/index.ts",
diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index e9f70ad9f..514fc937c 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## [Unreleased]
+
+## [5.0.0] - 2026-01-12
 ### Added
 
 - Added support for `xhigh` thinking level in `thinkingBudgets` configuration
diff --git a/packages/ai/package.json b/packages/ai/package.json
index e63291a25..5a865e66f 100644
--- a/packages/ai/package.json
+++ b/packages/ai/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@oh-my-pi/pi-ai",
-	"version": "4.9.0",
+	"version": "5.0.0",
 	"description": "Unified LLM API with automatic model discovery and provider configuration",
 	"type": "module",
 	"main": "./src/index.ts",
diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 50af1b9b3..aa6088ce8 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [5.0.0] - 2026-01-12
+
 ### Added
 
 - Implemented `xhigh` thinking level for Anthropic models with increased reasoning limits
diff --git a/packages/coding-agent/package.json b/packages/coding-agent/package.json
index 5c86c0c42..ad43b32ed 100644
--- a/packages/coding-agent/package.json
+++ b/packages/coding-agent/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@oh-my-pi/pi-coding-agent",
-	"version": "4.9.0",
+	"version": "5.0.0",
 	"description": "Coding agent CLI with read, bash, edit, write tools and session management",
 	"type": "module",
 	"ompConfig": {
diff --git a/packages/git-tool/CHANGELOG.md b/packages/git-tool/CHANGELOG.md
index dc0ad0a02..d5c71c6f4 100644
--- a/packages/git-tool/CHANGELOG.md
+++ b/packages/git-tool/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [5.0.0] - 2026-01-12
+
 ## [4.9.0] - 2026-01-12
 
 ## [4.8.3] - 2026-01-12
diff --git a/packages/git-tool/package.json b/packages/git-tool/package.json
index 990cc24e6..3894d123b 100644
--- a/packages/git-tool/package.json
+++ b/packages/git-tool/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@oh-my-pi/pi-git-tool",
-	"version": "4.9.0",
+	"version": "5.0.0",
 	"description": "Structured Git tool with safety guards and typed output",
 	"type": "module",
 	"main": "./src/index.ts",
diff --git a/packages/tui/CHANGELOG.md b/packages/tui/CHANGELOG.md
index cd462d83e..491229e01 100644
--- a/packages/tui/CHANGELOG.md
+++ b/packages/tui/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [5.0.0] - 2026-01-12
+
 ## [4.9.0] - 2026-01-12
 
 ## [4.8.3] - 2026-01-12
diff --git a/packages/tui/package.json b/packages/tui/package.json
index 29b873969..111a231f1 100644
--- a/packages/tui/package.json
+++ b/packages/tui/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@oh-my-pi/pi-tui",
-	"version": "4.9.0",
+	"version": "5.0.0",
 	"description": "Terminal User Interface library with differential rendering for efficient text-based applications",
 	"type": "module",
 	"main": "src/index.ts",