diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index 654ad6ae6..816236b0f 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -18,10 +18,10 @@ builds:
       - stdjson
     ldflags:
       - -s -w
-      - -X github.com/sipeed/picoclaw/cmd/picoclaw/internal.version={{ .Version }}
-      - -X github.com/sipeed/picoclaw/cmd/picoclaw/internal.gitCommit={{ .ShortCommit }}
-      - -X github.com/sipeed/picoclaw/cmd/picoclaw/internal.buildTime={{ .Date }}
-      - -X github.com/sipeed/picoclaw/cmd/picoclaw/internal.goVersion={{ .Env.GOVERSION }}
+      - -X github.com/sipeed/picoclaw/pkg/config.Version={{ .Version }}
+      - -X github.com/sipeed/picoclaw/pkg/config.GitCommit={{ .ShortCommit }}
+      - -X github.com/sipeed/picoclaw/pkg/config.BuildTime={{ .Date }}
+      - -X github.com/sipeed/picoclaw/pkg/config.GoVersion={{ .Env.GOVERSION }}
     goos:
       - linux
       - windows
diff --git a/Makefile b/Makefile
index 955c1c966..98642703f 100644
--- a/Makefile
+++ b/Makefile
@@ -11,8 +11,8 @@ VERSION?=$(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 GIT_COMMIT=$(shell git rev-parse --short=8 HEAD 2>/dev/null || echo "dev")
 BUILD_TIME=$(shell date +%FT%T%z)
 GO_VERSION=$(shell $(GO) version | awk '{print $$3}')
-INTERNAL=github.com/sipeed/picoclaw/cmd/picoclaw/internal
-LDFLAGS=-ldflags "-X $(INTERNAL).version=$(VERSION) -X $(INTERNAL).gitCommit=$(GIT_COMMIT) -X $(INTERNAL).buildTime=$(BUILD_TIME) -X $(INTERNAL).goVersion=$(GO_VERSION) -s -w"
+CONFIG_PKG=github.com/sipeed/picoclaw/pkg/config
+LDFLAGS=-ldflags "-X $(CONFIG_PKG).Version=$(VERSION) -X $(CONFIG_PKG).GitCommit=$(GIT_COMMIT) -X $(CONFIG_PKG).BuildTime=$(BUILD_TIME) -X $(CONFIG_PKG).GoVersion=$(GO_VERSION) -s -w"
 
 # Go variables
 GO?=CGO_ENABLED=0 go
diff --git a/cmd/picoclaw/internal/helpers.go b/cmd/picoclaw/internal/helpers.go
index f81d7013d..e04bccffb 100644
--- a/cmd/picoclaw/internal/helpers.go
+++ b/cmd/picoclaw/internal/helpers.go
@@ -1,23 +1,14 @@
 package internal
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
-	"runtime"
 
 	"github.com/sipeed/picoclaw/pkg/config"
 )
 
 const Logo = "🦞"
 
-var (
-	version   = "dev"
-	gitCommit string
-	buildTime string
-	goVersion string
-)
-
 // GetPicoclawHome returns the picoclaw home directory.
 // Priority: $PICOCLAW_HOME > ~/.picoclaw
 func GetPicoclawHome() string {
@@ -40,25 +31,19 @@ func LoadConfig() (*config.Config, error) {
 }
 
 // FormatVersion returns the version string with optional git commit
+// Deprecated: Use pkg/config.FormatVersion instead
 func FormatVersion() string {
-	v := version
-	if gitCommit != "" {
-		v += fmt.Sprintf(" (git: %s)", gitCommit)
-	}
-	return v
+	return config.FormatVersion()
 }
 
 // FormatBuildInfo returns build time and go version info
+// Deprecated: Use pkg/config.FormatBuildInfo instead
 func FormatBuildInfo() (string, string) {
-	build := buildTime
-	goVer := goVersion
-	if goVer == "" {
-		goVer = runtime.Version()
-	}
-	return build, goVer
+	return config.FormatBuildInfo()
 }
 
 // GetVersion returns the version string
+// Deprecated: Use pkg/config.GetVersion instead
 func GetVersion() string {
-	return version
+	return config.GetVersion()
 }
diff --git a/cmd/picoclaw/internal/helpers_test.go b/cmd/picoclaw/internal/helpers_test.go
index 646be1ba1..583751781 100644
--- a/cmd/picoclaw/internal/helpers_test.go
+++ b/cmd/picoclaw/internal/helpers_test.go
@@ -40,65 +40,6 @@ func TestGetConfigPath_WithPICOCLAW_CONFIG(t *testing.T) {
 	assert.Equal(t, want, got)
 }
 
-func TestFormatVersion_NoGitCommit(t *testing.T) {
-	oldVersion, oldGit := version, gitCommit
-	t.Cleanup(func() { version, gitCommit = oldVersion, oldGit })
-
-	version = "1.2.3"
-	gitCommit = ""
-
-	assert.Equal(t, "1.2.3", FormatVersion())
-}
-
-func TestFormatVersion_WithGitCommit(t *testing.T) {
-	oldVersion, oldGit := version, gitCommit
-	t.Cleanup(func() { version, gitCommit = oldVersion, oldGit })
-
-	version = "1.2.3"
-	gitCommit = "abc123"
-
-	assert.Equal(t, "1.2.3 (git: abc123)", FormatVersion())
-}
-
-func TestFormatBuildInfo_UsesBuildTimeAndGoVersion_WhenSet(t *testing.T) {
-	oldBuildTime, oldGoVersion := buildTime, goVersion
-	t.Cleanup(func() { buildTime, goVersion = oldBuildTime, oldGoVersion })
-
-	buildTime = "2026-02-20T00:00:00Z"
-	goVersion = "go1.23.0"
-
-	build, goVer := FormatBuildInfo()
-
-	assert.Equal(t, buildTime, build)
-	assert.Equal(t, goVersion, goVer)
-}
-
-func TestFormatBuildInfo_EmptyBuildTime_ReturnsEmptyBuild(t *testing.T) {
-	oldBuildTime, oldGoVersion := buildTime, goVersion
-	t.Cleanup(func() { buildTime, goVersion = oldBuildTime, oldGoVersion })
-
-	buildTime = ""
-	goVersion = "go1.23.0"
-
-	build, goVer := FormatBuildInfo()
-
-	assert.Empty(t, build)
-	assert.Equal(t, goVersion, goVer)
-}
-
-func TestFormatBuildInfo_EmptyGoVersion_FallsBackToRuntimeVersion(t *testing.T) {
-	oldBuildTime, oldGoVersion := buildTime, goVersion
-	t.Cleanup(func() { buildTime, goVersion = oldBuildTime, oldGoVersion })
-
-	buildTime = "x"
-	goVersion = ""
-
-	build, goVer := FormatBuildInfo()
-
-	assert.Equal(t, "x", build)
-	assert.Equal(t, runtime.Version(), goVer)
-}
-
 func TestGetConfigPath_Windows(t *testing.T) {
 	if runtime.GOOS != "windows" {
 		t.Skip("windows-specific HOME behavior varies; run on windows")
@@ -112,17 +53,3 @@ func TestGetConfigPath_Windows(t *testing.T) {
 
 	require.True(t, strings.EqualFold(got, want), "GetConfigPath() = %q, want %q", got, want)
 }
-
-func TestGetVersion(t *testing.T) {
-	assert.Equal(t, "dev", GetVersion())
-}
-
-func TestGetConfigPath_WithEnv(t *testing.T) {
-	t.Setenv("PICOCLAW_CONFIG", "/tmp/custom/config.json")
-	t.Setenv("HOME", "/tmp/home") // Also set home to ensure env is preferred
-
-	got := GetConfigPath()
-	want := "/tmp/custom/config.json"
-
-	assert.Equal(t, want, got)
-}
diff --git a/cmd/picoclaw/internal/status/helpers.go b/cmd/picoclaw/internal/status/helpers.go
index ab28f4885..dd7063fe6 100644
--- a/cmd/picoclaw/internal/status/helpers.go
+++ b/cmd/picoclaw/internal/status/helpers.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal"
 	"github.com/sipeed/picoclaw/pkg/auth"
+	"github.com/sipeed/picoclaw/pkg/config"
 )
 
 func statusCmd() {
@@ -18,8 +19,8 @@ func statusCmd() {
 	configPath := internal.GetConfigPath()
 
 	fmt.Printf("%s picoclaw Status\n", internal.Logo)
-	fmt.Printf("Version: %s\n", internal.FormatVersion())
-	build, _ := internal.FormatBuildInfo()
+	fmt.Printf("Version: %s\n", config.FormatVersion())
+	build, _ := config.FormatBuildInfo()
 	if build != "" {
 		fmt.Printf("Build: %s\n", build)
 	}
diff --git a/cmd/picoclaw/internal/version/command.go b/cmd/picoclaw/internal/version/command.go
index 1cf686671..71c7dd2f8 100644
--- a/cmd/picoclaw/internal/version/command.go
+++ b/cmd/picoclaw/internal/version/command.go
@@ -6,6 +6,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal"
+	"github.com/sipeed/picoclaw/pkg/config"
 )
 
 func NewVersionCommand() *cobra.Command {
@@ -22,8 +23,8 @@ func NewVersionCommand() *cobra.Command {
 }
 
 func printVersion() {
-	fmt.Printf("%s picoclaw %s\n", internal.Logo, internal.FormatVersion())
-	build, goVer := internal.FormatBuildInfo()
+	fmt.Printf("%s picoclaw %s\n", internal.Logo, config.FormatVersion())
+	build, goVer := config.FormatBuildInfo()
 	if build != "" {
 		fmt.Printf("  Build: %s\n", build)
 	}
diff --git a/cmd/picoclaw/main.go b/cmd/picoclaw/main.go
index fe4de8ecc..b82475905 100644
--- a/cmd/picoclaw/main.go
+++ b/cmd/picoclaw/main.go
@@ -22,10 +22,11 @@ import (
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal/skills"
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal/status"
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal/version"
+	"github.com/sipeed/picoclaw/pkg/config"
 )
 
 func NewPicoclawCommand() *cobra.Command {
-	short := fmt.Sprintf("%s picoclaw - Personal AI Assistant v%s\n\n", internal.Logo, internal.GetVersion())
+	short := fmt.Sprintf("%s picoclaw - Personal AI Assistant v%s\n\n", internal.Logo, config.GetVersion())
 
 	cmd := &cobra.Command{
 		Use:     "picoclaw",
diff --git a/cmd/picoclaw/main_test.go b/cmd/picoclaw/main_test.go
index 3740ba358..e622675ee 100644
--- a/cmd/picoclaw/main_test.go
+++ b/cmd/picoclaw/main_test.go
@@ -9,6 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/sipeed/picoclaw/cmd/picoclaw/internal"
+	"github.com/sipeed/picoclaw/pkg/config"
 )
 
 func TestNewPicoclawCommand(t *testing.T) {
@@ -16,7 +17,7 @@ func TestNewPicoclawCommand(t *testing.T) {
 
 	require.NotNil(t, cmd)
 
-	short := fmt.Sprintf("%s picoclaw - Personal AI Assistant v%s\n\n", internal.Logo, internal.GetVersion())
+	short := fmt.Sprintf("%s picoclaw - Personal AI Assistant v%s\n\n", internal.Logo, config.GetVersion())
 
 	assert.Equal(t, "picoclaw", cmd.Use)
 	assert.Equal(t, short, cmd.Short)
diff --git a/pkg/agent/context.go b/pkg/agent/context.go
index 92663a32d..33fe26001 100644
--- a/pkg/agent/context.go
+++ b/pkg/agent/context.go
@@ -12,6 +12,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/sipeed/picoclaw/pkg/config"
 	"github.com/sipeed/picoclaw/pkg/logger"
 	"github.com/sipeed/picoclaw/pkg/providers"
 	"github.com/sipeed/picoclaw/pkg/skills"
@@ -80,8 +81,10 @@ func NewContextBuilder(workspace string) *ContextBuilder {
 func (cb *ContextBuilder) getIdentity() string {
 	workspacePath, _ := filepath.Abs(filepath.Join(cb.workspace))
 	toolDiscovery := cb.getDiscoveryRule()
+	version := config.FormatVersion()
 
-	return fmt.Sprintf(`# picoclaw 🦞
+	return fmt.Sprintf(
+		`# picoclaw 🦞 (%s)
 
 You are picoclaw, a helpful AI assistant.
 
@@ -102,7 +105,7 @@ Your workspace is at: %s
 4. **Context summaries** - Conversation summaries provided as context are approximate references only. They may be incomplete or outdated. Always defer to explicit user instructions over summary content.
 
 %s`,
-		workspacePath, workspacePath, workspacePath, workspacePath, workspacePath, toolDiscovery)
+		version, workspacePath, workspacePath, workspacePath, workspacePath, workspacePath, toolDiscovery)
 }
 
 func (cb *ContextBuilder) getDiscoveryRule() string {
diff --git a/pkg/config/config.go b/pkg/config/config.go
index e3520faaf..13d5a7306 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -59,6 +59,16 @@ type Config struct {
 	Tools     ToolsConfig     `json:"tools"`
 	Heartbeat HeartbeatConfig `json:"heartbeat"`
 	Devices   DevicesConfig   `json:"devices"`
+	// BuildInfo contains build-time version information
+	BuildInfo BuildInfo `json:"build_info,omitempty"`
+}
+
+// BuildInfo contains build-time version information
+type BuildInfo struct {
+	Version   string `json:"version"`
+	GitCommit string `json:"git_commit"`
+	BuildTime string `json:"build_time"`
+	GoVersion string `json:"go_version"`
 }
 
 // MarshalJSON implements custom JSON marshaling for Config
diff --git a/pkg/config/defaults.go b/pkg/config/defaults.go
index 88cb254ad..5bb3bd1d6 100644
--- a/pkg/config/defaults.go
+++ b/pkg/config/defaults.go
@@ -510,5 +510,11 @@ func DefaultConfig() *Config {
 			Enabled:    false,
 			MonitorUSB: true,
 		},
+		BuildInfo: BuildInfo{
+			Version:   Version,
+			GitCommit: GitCommit,
+			BuildTime: BuildTime,
+			GoVersion: GoVersion,
+		},
 	}
 }
diff --git a/pkg/config/version.go b/pkg/config/version.go
new file mode 100644
index 000000000..b65d3cf33
--- /dev/null
+++ b/pkg/config/version.go
@@ -0,0 +1,44 @@
+package config
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Build-time variables injected via ldflags during build process.
+// These are set by the Makefile or .goreleaser.yaml using the -X flag:
+//
+//	-X github.com/sipeed/picoclaw/pkg/config.Version=<version>
+//	-X github.com/sipeed/picoclaw/pkg/config.GitCommit=<commit>
+//	-X github.com/sipeed/picoclaw/pkg/config.BuildTime=<timestamp>
+//	-X github.com/sipeed/picoclaw/pkg/config.GoVersion=<go-version>
+var (
+	Version   = "dev" // Default value when not built with ldflags
+	GitCommit string  // Git commit SHA (short)
+	BuildTime string  // Build timestamp in RFC3339 format
+	GoVersion string  // Go version used for building
+)
+
+// FormatVersion returns the version string with optional git commit
+func FormatVersion() string {
+	v := Version
+	if GitCommit != "" {
+		v += fmt.Sprintf(" (git: %s)", GitCommit)
+	}
+	return v
+}
+
+// FormatBuildInfo returns build time and go version info
+func FormatBuildInfo() (string, string) {
+	build := BuildTime
+	goVer := GoVersion
+	if goVer == "" {
+		goVer = runtime.Version()
+	}
+	return build, goVer
+}
+
+// GetVersion returns the version string
+func GetVersion() string {
+	return Version
+}
diff --git a/pkg/config/version_test.go b/pkg/config/version_test.go
new file mode 100644
index 000000000..34bc906ce
--- /dev/null
+++ b/pkg/config/version_test.go
@@ -0,0 +1,92 @@
+package config
+
+import (
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFormatVersion_NoGitCommit(t *testing.T) {
+	oldVersion, oldGit := Version, GitCommit
+	t.Cleanup(func() { Version, GitCommit = oldVersion, oldGit })
+
+	Version = "1.2.3"
+	GitCommit = ""
+
+	assert.Equal(t, "1.2.3", FormatVersion())
+}
+
+func TestFormatVersion_WithGitCommit(t *testing.T) {
+	oldVersion, oldGit := Version, GitCommit
+	t.Cleanup(func() { Version, GitCommit = oldVersion, oldGit })
+
+	Version = "1.2.3"
+	GitCommit = "abc123"
+
+	assert.Equal(t, "1.2.3 (git: abc123)", FormatVersion())
+}
+
+func TestFormatBuildInfo_UsesBuildTimeAndGoVersion_WhenSet(t *testing.T) {
+	oldBuildTime, oldGoVersion := BuildTime, GoVersion
+	t.Cleanup(func() { BuildTime, GoVersion = oldBuildTime, oldGoVersion })
+
+	BuildTime = "2026-02-20T00:00:00Z"
+	GoVersion = "go1.23.0"
+
+	build, goVer := FormatBuildInfo()
+
+	assert.Equal(t, BuildTime, build)
+	assert.Equal(t, GoVersion, goVer)
+}
+
+func TestFormatBuildInfo_EmptyBuildTime_ReturnsEmptyBuild(t *testing.T) {
+	oldBuildTime, oldGoVersion := BuildTime, GoVersion
+	t.Cleanup(func() { BuildTime, GoVersion = oldBuildTime, oldGoVersion })
+
+	BuildTime = ""
+	GoVersion = "go1.23.0"
+
+	build, goVer := FormatBuildInfo()
+
+	assert.Empty(t, build)
+	assert.Equal(t, GoVersion, goVer)
+}
+
+func TestFormatBuildInfo_EmptyGoVersion_FallsBackToRuntimeVersion(t *testing.T) {
+	oldBuildTime, oldGoVersion := BuildTime, GoVersion
+	t.Cleanup(func() { BuildTime, GoVersion = oldBuildTime, oldGoVersion })
+
+	BuildTime = "x"
+	GoVersion = ""
+
+	build, goVer := FormatBuildInfo()
+
+	assert.Equal(t, "x", build)
+	assert.Equal(t, runtime.Version(), goVer)
+}
+
+func TestGetVersion(t *testing.T) {
+	oldVersion := Version
+	t.Cleanup(func() { Version = oldVersion })
+
+	Version = "dev"
+	assert.Equal(t, "dev", GetVersion())
+}
+
+func TestGetVersion_Custom(t *testing.T) {
+	oldVersion := Version
+	t.Cleanup(func() { Version = oldVersion })
+
+	Version = "v1.0.0"
+	assert.Equal(t, "v1.0.0", GetVersion())
+}
+
+func TestVersion_DefaultIsDev(t *testing.T) {
+	// Reset to default values
+	oldVersion := Version
+	Version = "dev"
+	t.Cleanup(func() { Version = oldVersion })
+
+	assert.Equal(t, "dev", Version)
+}
diff --git a/workspace/IDENTITY.md b/workspace/IDENTITY.md
index dabb0e14b..20e3e49fa 100644
--- a/workspace/IDENTITY.md
+++ b/workspace/IDENTITY.md
@@ -6,9 +6,6 @@ PicoClaw 🦞
 ## Description
 Ultra-lightweight personal AI assistant written in Go, inspired by nanobot.
 
-## Version
-0.1.0
-
 ## Purpose
 - Provide intelligent AI assistance with minimal resource usage
 - Support multiple LLM providers (OpenAI, Anthropic, Zhipu, etc.)