fix(test): set USERPROFILE on Windows for skills tests

os.UserHomeDir() uses USERPROFILE on Windows, not HOME. Add
setTestHome helper that sets both env vars for cross-platform
compatibility in CI.

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

.github/workflows/release.yml

@@ -91,6 +91,33 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate Release Notes
+        id: release_notes
+        run: |
+          # Get previous tag
+          PREVIOUS_TAG=$(git tag --sort=-version:refname | grep -v "^${{ github.ref_name }}$" | head -n 1)
+
+          if [ -z "$PREVIOUS_TAG" ]; then
+            echo "No previous tag found, using all commits"
+            COMMITS=$(git log --pretty=format:"- %s (%h)" --no-merges)
+          else
+            echo "Generating notes from $PREVIOUS_TAG to ${{ github.ref_name }}"
+            COMMITS=$(git log ${PREVIOUS_TAG}..${{ github.ref_name }} --pretty=format:"- %s (%h)" --no-merges)
+          fi
+
+          # Create release notes
+          cat > release_notes.md <<EOF
+          ## What's Changed
+
+          ${COMMITS}
+
+          **Full Changelog**: https://github.com/${{ github.repository }}/compare/${PREVIOUS_TAG}...${{ github.ref_name }}
+          EOF
+
+          cat release_notes.md
 
       - name: Download all artifacts
         uses: actions/download-artifact@v4
@@ -108,6 +135,6 @@ jobs:
         uses: softprops/action-gh-release@v2
         with:
           files: release/*
-          generate_release_notes: true
+          body_path: release_notes.md
           draft: false
           prerelease: false

.gitignore

@@ -9,3 +9,4 @@ __pycache__
 coverage.out
 references
 output/
+.worktrees/

codeagent-wrapper/internal/app/cli.go

@@ -29,7 +29,9 @@ type cliOptions struct {
 	ReasoningEffort string
 	Agent           string
 	PromptFile      string
+	Skills          string
 	SkipPermissions bool
+	Worktree        bool
 
 	Parallel   bool
 	FullOutput bool
@@ -133,9 +135,11 @@ func addRootFlags(fs *pflag.FlagSet, opts *cliOptions) {
 	fs.StringVar(&opts.ReasoningEffort, "reasoning-effort", "", "Reasoning effort (backend-specific)")
 	fs.StringVar(&opts.Agent, "agent", "", "Agent preset name (from ~/.codeagent/models.json)")
 	fs.StringVar(&opts.PromptFile, "prompt-file", "", "Prompt file path")
+	fs.StringVar(&opts.Skills, "skills", "", "Comma-separated skill names for spec injection")
 
 	fs.BoolVar(&opts.SkipPermissions, "skip-permissions", false, "Skip permissions prompts (also via CODEAGENT_SKIP_PERMISSIONS)")
 	fs.BoolVar(&opts.SkipPermissions, "dangerously-skip-permissions", false, "Alias for --skip-permissions")
+	fs.BoolVar(&opts.Worktree, "worktree", false, "Execute in a new git worktree (auto-generates task ID)")
 }
 
 func newVersionCommand(name string) *cobra.Command {
@@ -337,6 +341,16 @@ func buildSingleConfig(cmd *cobra.Command, args []string, rawArgv []string, opts
 		return nil, fmt.Errorf("task required")
 	}
 
+	var skills []string
+	if cmd.Flags().Changed("skills") {
+		for _, s := range strings.Split(opts.Skills, ",") {
+			s = strings.TrimSpace(s)
+			if s != "" {
+				skills = append(skills, s)
+			}
+		}
+	}
+
 	cfg := &Config{
 		WorkDir:            defaultWorkdir,
 		Backend:            backendName,
@@ -350,6 +364,8 @@ func buildSingleConfig(cmd *cobra.Command, args []string, rawArgv []string, opts
 		MaxParallelWorkers: config.ResolveMaxParallelWorkers(),
 		AllowedTools:       resolvedAllowedTools,
 		DisallowedTools:    resolvedDisallowedTools,
+		Skills:             skills,
+		Worktree:           opts.Worktree,
 	}
 
 	if args[0] == "resume" {
@@ -415,7 +431,7 @@ func runParallelMode(cmd *cobra.Command, args []string, opts *cliOptions, v *vip
 		return 1
 	}
 
-	if cmd.Flags().Changed("agent") || cmd.Flags().Changed("prompt-file") || cmd.Flags().Changed("reasoning-effort") {
+	if cmd.Flags().Changed("agent") || cmd.Flags().Changed("prompt-file") || cmd.Flags().Changed("reasoning-effort") || cmd.Flags().Changed("skills") {
 		fmt.Fprintln(os.Stderr, "ERROR: --parallel reads its task configuration from stdin; only --backend, --model, --full-output and --skip-permissions are allowed.")
 		return 1
 	}
@@ -582,6 +598,17 @@ func runSingleMode(cfg *Config, name string) int {
 		taskText = wrapTaskWithAgentPrompt(prompt, taskText)
 	}
 
+	// Resolve skills: explicit > auto-detect from workdir
+	skills := cfg.Skills
+	if len(skills) == 0 {
+		skills = detectProjectSkills(cfg.WorkDir)
+	}
+	if len(skills) > 0 {
+		if content := resolveSkillContent(skills, 0); content != "" {
+			taskText = taskText + "\n\n# Domain Best Practices\n\n" + content
+		}
+	}
+
 	useStdin := cfg.ExplicitStdin || shouldUseStdin(taskText, piped)
 
 	targetArg := taskText
@@ -653,6 +680,7 @@ func runSingleMode(cfg *Config, name string) int {
 		ReasoningEffort: cfg.ReasoningEffort,
 		Agent:           cfg.Agent,
 		SkipPermissions: cfg.SkipPermissions,
+		Worktree:        cfg.Worktree,
 		AllowedTools:    cfg.AllowedTools,
 		DisallowedTools: cfg.DisallowedTools,
 		UseStdin:        useStdin,

codeagent-wrapper/internal/app/executor_alias.go

@@ -52,3 +52,11 @@ func runCodexProcess(parentCtx context.Context, codexArgs []string, taskText str
 func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backend Backend, customArgs []string, useCustomArgs bool, silent bool, timeoutSec int) TaskResult {
 	return executor.RunCodexTaskWithContext(parentCtx, taskSpec, backend, codexCommand, buildCodexArgsFn, customArgs, useCustomArgs, silent, timeoutSec)
 }
+
+func detectProjectSkills(workDir string) []string {
+	return executor.DetectProjectSkills(workDir)
+}
+
+func resolveSkillContent(skills []string, maxBudget int) string {
+	return executor.ResolveSkillContent(skills, maxBudget)
+}

codeagent-wrapper/internal/app/main_test.go

@@ -1616,6 +1616,60 @@ do something`
 	}
 }
 
+func TestParallelParseConfig_Worktree(t *testing.T) {
+	input := `---TASK---
+id: task-1
+worktree: true
+---CONTENT---
+do something`
+
+	cfg, err := parseParallelConfig([]byte(input))
+	if err != nil {
+		t.Fatalf("parseParallelConfig() unexpected error: %v", err)
+	}
+	if len(cfg.Tasks) != 1 {
+		t.Fatalf("expected 1 task, got %d", len(cfg.Tasks))
+	}
+	task := cfg.Tasks[0]
+	if !task.Worktree {
+		t.Fatalf("Worktree = %v, want true", task.Worktree)
+	}
+}
+
+func TestParallelParseConfig_WorktreeBooleanValue(t *testing.T) {
+	tests := []struct {
+		name  string
+		value string
+		want  bool
+	}{
+		{"true", "true", true},
+		{"1", "1", true},
+		{"yes", "yes", true},
+		{"false", "false", false},
+		{"0", "0", false},
+		{"no", "no", false},
+		{"empty", "", true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			input := fmt.Sprintf(`---TASK---
+id: task-1
+worktree: %s
+---CONTENT---
+do something`, tt.value)
+
+			cfg, err := parseParallelConfig([]byte(input))
+			if err != nil {
+				t.Fatalf("parseParallelConfig() unexpected error: %v", err)
+			}
+			if cfg.Tasks[0].Worktree != tt.want {
+				t.Fatalf("Worktree = %v, want %v for value %q", cfg.Tasks[0].Worktree, tt.want, tt.value)
+			}
+		})
+	}
+}
+
 func TestParallelParseConfig_EmptySessionID(t *testing.T) {
 	input := `---TASK---
 id: task-1

codeagent-wrapper/internal/config/config.go

@@ -26,6 +26,8 @@ type Config struct {
 	MaxParallelWorkers int
 	AllowedTools       []string
 	DisallowedTools    []string
+	Skills             []string
+	Worktree           bool // Execute in a new git worktree
 }
 
 // EnvFlagEnabled returns true when the environment variable exists and is not

codeagent-wrapper/internal/executor/executor.go

@@ -21,6 +21,7 @@ import (
 	ilogger "codeagent-wrapper/internal/logger"
 	parser "codeagent-wrapper/internal/parser"
 	utils "codeagent-wrapper/internal/utils"
+	"codeagent-wrapper/internal/worktree"
 )
 
 const postMessageTerminateDelay = 1 * time.Second
@@ -49,6 +50,7 @@ var (
 	selectBackendFn    = backend.Select
 	commandContext     = exec.CommandContext
 	terminateCommandFn = terminateCommand
+	createWorktreeFn   = worktree.CreateWorktree
 )
 
 var forceKillDelay atomic.Int32
@@ -335,6 +337,16 @@ func DefaultRunCodexTaskFn(task TaskSpec, timeout int) TaskResult {
 		}
 		task.Task = WrapTaskWithAgentPrompt(prompt, task.Task)
 	}
+	// Resolve skills: explicit > auto-detect from workdir
+	skills := task.Skills
+	if len(skills) == 0 {
+		skills = DetectProjectSkills(task.WorkDir)
+	}
+	if len(skills) > 0 {
+		if content := ResolveSkillContent(skills, 0); content != "" {
+			task.Task = task.Task + "\n\n# Domain Best Practices\n\n" + content
+		}
+	}
 	if task.UseStdin || ShouldUseStdin(task.Task, false) {
 		task.UseStdin = true
 	}
@@ -939,6 +951,23 @@ func RunCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 		cfg.WorkDir = defaultWorkdir
 	}
 
+	// Handle worktree mode: check DO_WORKTREE_DIR env var first, then create if needed
+	if worktreeDir := os.Getenv("DO_WORKTREE_DIR"); worktreeDir != "" {
+		// Use existing worktree from /do setup
+		cfg.WorkDir = worktreeDir
+		logInfo(fmt.Sprintf("Using existing worktree from DO_WORKTREE_DIR: %s", worktreeDir))
+	} else if taskSpec.Worktree {
+		// Create new worktree (backward compatibility for standalone --worktree usage)
+		paths, err := createWorktreeFn(cfg.WorkDir)
+		if err != nil {
+			result.ExitCode = 1
+			result.Error = fmt.Sprintf("failed to create worktree: %v", err)
+			return result
+		}
+		cfg.WorkDir = paths.Dir
+		logInfo(fmt.Sprintf("Using worktree: %s (task_id: %s, branch: %s)", paths.Dir, paths.TaskID, paths.Branch))
+	}
+
 	if cfg.Mode == "resume" && strings.TrimSpace(cfg.SessionID) == "" {
 		result.ExitCode = 1
 		result.Error = "resume mode requires non-empty session_id"

codeagent-wrapper/internal/executor/parallel_config.go

@@ -75,6 +75,12 @@ func ParseParallelConfig(data []byte) (*ParallelConfig, error) {
 					continue
 				}
 				task.SkipPermissions = config.ParseBoolFlag(value, false)
+			case "worktree":
+				if value == "" {
+					task.Worktree = true
+					continue
+				}
+				task.Worktree = config.ParseBoolFlag(value, false)
 			case "dependencies":
 				for _, dep := range strings.Split(value, ",") {
 					dep = strings.TrimSpace(dep)
@@ -82,6 +88,13 @@ func ParseParallelConfig(data []byte) (*ParallelConfig, error) {
 						task.Dependencies = append(task.Dependencies, dep)
 					}
 				}
+			case "skills":
+				for _, s := range strings.Split(value, ",") {
+					s = strings.TrimSpace(s)
+					if s != "" {
+						task.Skills = append(task.Skills, s)
+					}
+				}
 			}
 		}
 
@@ -93,17 +106,17 @@ func ParseParallelConfig(data []byte) (*ParallelConfig, error) {
 			if strings.TrimSpace(task.Agent) == "" {
 				return nil, fmt.Errorf("task block #%d has empty agent field", taskIndex)
 			}
-				if err := config.ValidateAgentName(task.Agent); err != nil {
+			if err := config.ValidateAgentName(task.Agent); err != nil {
-					return nil, fmt.Errorf("task block #%d invalid agent name: %w", taskIndex, err)
+				return nil, fmt.Errorf("task block #%d invalid agent name: %w", taskIndex, err)
-				}
+			}
-				backend, model, promptFile, reasoning, _, _, _, allowedTools, disallowedTools, err := config.ResolveAgentConfig(task.Agent)
+			backend, model, promptFile, reasoning, _, _, _, allowedTools, disallowedTools, err := config.ResolveAgentConfig(task.Agent)
-				if err != nil {
+			if err != nil {
-					return nil, fmt.Errorf("task block #%d failed to resolve agent %q: %w", taskIndex, task.Agent, err)
+				return nil, fmt.Errorf("task block #%d failed to resolve agent %q: %w", taskIndex, task.Agent, err)
-				}
+			}
-				if task.Backend == "" {
+			if task.Backend == "" {
-					task.Backend = backend
+				task.Backend = backend
-				}
+			}
-				if task.Model == "" {
+			if task.Model == "" {
 				task.Model = model
 			}
 			if task.ReasoningEffort == "" {

codeagent-wrapper/internal/executor/prompt.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"regexp"
 	"strings"
 )
 
@@ -128,3 +129,116 @@ func ReadAgentPromptFile(path string, allowOutsideClaudeDir bool) (string, error
 func WrapTaskWithAgentPrompt(prompt string, task string) string {
 	return "<agent-prompt>\n" + prompt + "\n</agent-prompt>\n\n" + task
 }
+
+// techSkillMap maps file-existence fingerprints to skill names.
+var techSkillMap = []struct {
+	Files  []string // any of these files → this tech
+	Skills []string
+}{
+	{Files: []string{"go.mod", "go.sum"}, Skills: []string{"golang-base-practices"}},
+	{Files: []string{"Cargo.toml"}, Skills: []string{"rust-best-practices"}},
+	{Files: []string{"pyproject.toml", "setup.py", "requirements.txt", "Pipfile"}, Skills: []string{"python-best-practices"}},
+	{Files: []string{"package.json"}, Skills: []string{"vercel-react-best-practices", "frontend-design"}},
+	{Files: []string{"vue.config.js", "vite.config.ts", "nuxt.config.ts"}, Skills: []string{"vue-web-app"}},
+}
+
+// DetectProjectSkills scans workDir for tech-stack fingerprints and returns
+// skill names that are both detected and installed at ~/.claude/skills/{name}/SKILL.md.
+func DetectProjectSkills(workDir string) []string {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return nil
+	}
+	var detected []string
+	seen := make(map[string]bool)
+	for _, entry := range techSkillMap {
+		for _, f := range entry.Files {
+			if _, err := os.Stat(filepath.Join(workDir, f)); err == nil {
+				for _, skill := range entry.Skills {
+					if seen[skill] {
+						continue
+					}
+					skillPath := filepath.Join(home, ".claude", "skills", skill, "SKILL.md")
+					if _, err := os.Stat(skillPath); err == nil {
+						detected = append(detected, skill)
+						seen[skill] = true
+					}
+				}
+				break // one matching file is enough for this entry
+			}
+		}
+	}
+	return detected
+}
+
+const defaultSkillBudget = 16000 // chars, ~4K tokens
+
+// validSkillName ensures skill names contain only safe characters to prevent path traversal
+var validSkillName = regexp.MustCompile(`^[a-zA-Z0-9_-]+$`)
+
+// ResolveSkillContent reads SKILL.md files for the given skill names,
+// strips YAML frontmatter, wraps each in <skill> tags, and enforces a
+// character budget to prevent context bloat.
+func ResolveSkillContent(skills []string, maxBudget int) string {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return ""
+	}
+	if maxBudget <= 0 {
+		maxBudget = defaultSkillBudget
+	}
+	var sections []string
+	remaining := maxBudget
+	for _, name := range skills {
+		name = strings.TrimSpace(name)
+		if name == "" {
+			continue
+		}
+		if !validSkillName.MatchString(name) {
+			logWarn(fmt.Sprintf("skill %q: invalid name (must contain only [a-zA-Z0-9_-]), skipping", name))
+			continue
+		}
+		path := filepath.Join(home, ".claude", "skills", name, "SKILL.md")
+		data, err := os.ReadFile(path)
+		if err != nil || len(data) == 0 {
+			logWarn(fmt.Sprintf("skill %q: SKILL.md not found or empty, skipping", name))
+			continue
+		}
+		body := stripYAMLFrontmatter(strings.TrimSpace(string(data)))
+		tagOverhead := len("<skill name=\"\">") + len(name) + len("\n") + len("\n</skill>")
+		bodyBudget := remaining - tagOverhead
+		if bodyBudget <= 0 {
+			logWarn(fmt.Sprintf("skill %q: skipped, insufficient budget for tags", name))
+			break
+		}
+		if len(body) > bodyBudget {
+			logWarn(fmt.Sprintf("skill %q: truncated from %d to %d chars (budget)", name, len(body), bodyBudget))
+			body = body[:bodyBudget]
+		}
+		remaining -= len(body) + tagOverhead
+		sections = append(sections, "<skill name=\""+name+"\">\n"+body+"\n</skill>")
+		if remaining <= 0 {
+			break
+		}
+	}
+	if len(sections) == 0 {
+		return ""
+	}
+	return strings.Join(sections, "\n\n")
+}
+
+func stripYAMLFrontmatter(s string) string {
+	s = strings.ReplaceAll(s, "\r\n", "\n")
+	if !strings.HasPrefix(s, "---") {
+		return s
+	}
+	idx := strings.Index(s[3:], "\n---")
+	if idx < 0 {
+		return s
+	}
+	result := s[3+idx+4:]
+	if len(result) > 0 && result[0] == '\n' {
+		result = result[1:]
+	}
+	return strings.TrimSpace(result)
+}

codeagent-wrapper/internal/executor/skills_test.go

@@ -0,0 +1,343 @@
+package executor
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+// setTestHome overrides the home directory for both Unix (HOME) and Windows (USERPROFILE).
+func setTestHome(t *testing.T, home string) {
+	t.Helper()
+	t.Setenv("HOME", home)
+	if runtime.GOOS == "windows" {
+		t.Setenv("USERPROFILE", home)
+	}
+}
+
+// --- helper: create a temp skill dir with SKILL.md ---
+
+func createTempSkill(t *testing.T, name, content string) string {
+	t.Helper()
+	home := t.TempDir()
+	skillDir := filepath.Join(home, ".claude", "skills", name)
+	if err := os.MkdirAll(skillDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(skillDir, "SKILL.md"), []byte(content), 0644); err != nil {
+		t.Fatal(err)
+	}
+	return home
+}
+
+// --- ParseParallelConfig skills parsing tests ---
+
+func TestParseParallelConfig_SkillsField(t *testing.T) {
+	tests := []struct {
+		name           string
+		input          string
+		taskIdx        int
+		expectedSkills []string
+	}{
+		{
+			name: "single skill",
+			input: `---TASK---
+id: t1
+workdir: .
+skills: golang-base-practices
+---CONTENT---
+Do something.
+`,
+			taskIdx:        0,
+			expectedSkills: []string{"golang-base-practices"},
+		},
+		{
+			name: "multiple comma-separated skills",
+			input: `---TASK---
+id: t1
+workdir: .
+skills: golang-base-practices, vercel-react-best-practices
+---CONTENT---
+Do something.
+`,
+			taskIdx:        0,
+			expectedSkills: []string{"golang-base-practices", "vercel-react-best-practices"},
+		},
+		{
+			name: "no skills field",
+			input: `---TASK---
+id: t1
+workdir: .
+---CONTENT---
+Do something.
+`,
+			taskIdx:        0,
+			expectedSkills: nil,
+		},
+		{
+			name: "empty skills value",
+			input: `---TASK---
+id: t1
+workdir: .
+skills:
+---CONTENT---
+Do something.
+`,
+			taskIdx:        0,
+			expectedSkills: nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg, err := ParseParallelConfig([]byte(tt.input))
+			if err != nil {
+				t.Fatalf("ParseParallelConfig error: %v", err)
+			}
+			got := cfg.Tasks[tt.taskIdx].Skills
+			if len(got) != len(tt.expectedSkills) {
+				t.Fatalf("skills: got %v, want %v", got, tt.expectedSkills)
+			}
+			for i := range got {
+				if got[i] != tt.expectedSkills[i] {
+					t.Errorf("skills[%d]: got %q, want %q", i, got[i], tt.expectedSkills[i])
+				}
+			}
+		})
+	}
+}
+
+// --- stripYAMLFrontmatter tests ---
+
+func TestStripYAMLFrontmatter(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "with frontmatter",
+			input:    "---\nname: test\ndescription: foo\n---\n\n# Body\nContent here.",
+			expected: "# Body\nContent here.",
+		},
+		{
+			name:     "no frontmatter",
+			input:    "# Just a body\nNo frontmatter.",
+			expected: "# Just a body\nNo frontmatter.",
+		},
+		{
+			name:     "empty",
+			input:    "",
+			expected: "",
+		},
+		{
+			name:     "only frontmatter",
+			input:    "---\nname: test\n---",
+			expected: "",
+		},
+		{
+			name:     "frontmatter with allowed-tools",
+			input:    "---\nname: do\nallowed-tools: [\"Bash\"]\n---\n\n# Skill content",
+			expected: "# Skill content",
+		},
+		{
+			name:     "CRLF line endings",
+			input:    "---\r\nname: test\r\n---\r\n\r\n# Body\r\nContent.",
+			expected: "# Body\nContent.",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := stripYAMLFrontmatter(tt.input)
+			if got != tt.expected {
+				t.Errorf("got %q, want %q", got, tt.expected)
+			}
+		})
+	}
+}
+
+// --- DetectProjectSkills tests ---
+
+func TestDetectProjectSkills_GoProject(t *testing.T) {
+	tmpDir := t.TempDir()
+	os.WriteFile(filepath.Join(tmpDir, "go.mod"), []byte("module test"), 0644)
+
+	skills := DetectProjectSkills(tmpDir)
+	// Result depends on whether golang-base-practices is installed locally
+	t.Logf("detected skills for Go project: %v", skills)
+}
+
+func TestDetectProjectSkills_NoFingerprints(t *testing.T) {
+	tmpDir := t.TempDir()
+	skills := DetectProjectSkills(tmpDir)
+	if len(skills) != 0 {
+		t.Errorf("expected no skills for empty dir, got %v", skills)
+	}
+}
+
+func TestDetectProjectSkills_FullStack(t *testing.T) {
+	tmpDir := t.TempDir()
+	os.WriteFile(filepath.Join(tmpDir, "go.mod"), []byte("module test"), 0644)
+	os.WriteFile(filepath.Join(tmpDir, "package.json"), []byte(`{"name":"test"}`), 0644)
+
+	skills := DetectProjectSkills(tmpDir)
+	t.Logf("detected skills for fullstack project: %v", skills)
+	seen := make(map[string]bool)
+	for _, s := range skills {
+		if seen[s] {
+			t.Errorf("duplicate skill detected: %s", s)
+		}
+		seen[s] = true
+	}
+}
+
+func TestDetectProjectSkills_NonexistentDir(t *testing.T) {
+	skills := DetectProjectSkills("/nonexistent/path/xyz")
+	if len(skills) != 0 {
+		t.Errorf("expected no skills for nonexistent dir, got %v", skills)
+	}
+}
+
+// --- ResolveSkillContent tests (CI-friendly with temp dirs) ---
+
+func TestResolveSkillContent_ValidSkill(t *testing.T) {
+	home := createTempSkill(t, "test-skill", "---\nname: test\n---\n\n# Test Skill\nBest practices here.")
+	setTestHome(t, home)
+
+	result := ResolveSkillContent([]string{"test-skill"}, 0)
+	if result == "" {
+		t.Fatal("expected non-empty content")
+	}
+	if !strings.Contains(result, `<skill name="test-skill">`) {
+		t.Error("missing opening <skill> tag")
+	}
+	if !strings.Contains(result, "</skill>") {
+		t.Error("missing closing </skill> tag")
+	}
+	if !strings.Contains(result, "# Test Skill") {
+		t.Error("missing skill body content")
+	}
+	if strings.Contains(result, "name: test") {
+		t.Error("frontmatter was not stripped")
+	}
+}
+
+func TestResolveSkillContent_NonexistentSkill(t *testing.T) {
+	home := t.TempDir()
+	setTestHome(t, home)
+
+	result := ResolveSkillContent([]string{"nonexistent-skill-xyz"}, 0)
+	if result != "" {
+		t.Errorf("expected empty for nonexistent skill, got %d bytes", len(result))
+	}
+}
+
+func TestResolveSkillContent_Empty(t *testing.T) {
+	if result := ResolveSkillContent(nil, 0); result != "" {
+		t.Errorf("expected empty for nil, got %q", result)
+	}
+	if result := ResolveSkillContent([]string{}, 0); result != "" {
+		t.Errorf("expected empty for empty, got %q", result)
+	}
+}
+
+func TestResolveSkillContent_Budget(t *testing.T) {
+	longBody := strings.Repeat("x", 500)
+	home := createTempSkill(t, "big-skill", "---\nname: big\n---\n\n"+longBody)
+	setTestHome(t, home)
+
+	result := ResolveSkillContent([]string{"big-skill"}, 200)
+	if result == "" {
+		t.Fatal("expected non-empty even with small budget")
+	}
+	if len(result) > 200 {
+		t.Errorf("result %d bytes exceeds budget 200", len(result))
+	}
+	t.Logf("budget=200, result=%d bytes", len(result))
+}
+
+func TestResolveSkillContent_MultipleSkills(t *testing.T) {
+	home := t.TempDir()
+	for _, name := range []string{"skill-a", "skill-b"} {
+		skillDir := filepath.Join(home, ".claude", "skills", name)
+		os.MkdirAll(skillDir, 0755)
+		os.WriteFile(filepath.Join(skillDir, "SKILL.md"), []byte("# "+name+"\nContent."), 0644)
+	}
+	setTestHome(t, home)
+
+	result := ResolveSkillContent([]string{"skill-a", "skill-b"}, 0)
+	if result == "" {
+		t.Fatal("expected non-empty for multiple skills")
+	}
+	if !strings.Contains(result, `<skill name="skill-a">`) {
+		t.Error("missing skill-a tag")
+	}
+	if !strings.Contains(result, `<skill name="skill-b">`) {
+		t.Error("missing skill-b tag")
+	}
+}
+
+func TestResolveSkillContent_PathTraversal(t *testing.T) {
+	home := t.TempDir()
+	setTestHome(t, home)
+
+	result := ResolveSkillContent([]string{"../../../etc/passwd"}, 0)
+	if result != "" {
+		t.Errorf("expected empty for path traversal name, got %d bytes", len(result))
+	}
+}
+
+func TestResolveSkillContent_InvalidNames(t *testing.T) {
+	home := t.TempDir()
+	setTestHome(t, home)
+
+	tests := []string{"../bad", "foo/bar", "skill name", "skill.name", "a b"}
+	for _, name := range tests {
+		result := ResolveSkillContent([]string{name}, 0)
+		if result != "" {
+			t.Errorf("expected empty for invalid name %q, got %d bytes", name, len(result))
+		}
+	}
+}
+
+func TestResolveSkillContent_ValidNamePattern(t *testing.T) {
+	if !validSkillName.MatchString("golang-base-practices") {
+		t.Error("golang-base-practices should be valid")
+	}
+	if !validSkillName.MatchString("my_skill_v2") {
+		t.Error("my_skill_v2 should be valid")
+	}
+	if validSkillName.MatchString("../bad") {
+		t.Error("../bad should be invalid")
+	}
+	if validSkillName.MatchString("") {
+		t.Error("empty should be invalid")
+	}
+}
+
+// --- Integration: skill injection format test ---
+
+func TestSkillInjectionFormat(t *testing.T) {
+	home := createTempSkill(t, "test-go", "---\nname: go\n---\n\n# Go Best Practices\nUse gofmt.")
+	setTestHome(t, home)
+
+	taskText := "Implement the feature."
+	content := ResolveSkillContent([]string{"test-go"}, 0)
+	injected := taskText + "\n\n# Domain Best Practices\n\n" + content
+
+	if !strings.Contains(injected, "Implement the feature.") {
+		t.Error("original task text lost")
+	}
+	if !strings.Contains(injected, "# Domain Best Practices") {
+		t.Error("missing section header")
+	}
+	if !strings.Contains(injected, `<skill name="test-go">`) {
+		t.Error("missing <skill> tag")
+	}
+	if !strings.Contains(injected, "Use gofmt.") {
+		t.Error("missing skill body")
+	}
+}

codeagent-wrapper/internal/executor/task_types.go

@@ -21,8 +21,10 @@ type TaskSpec struct {
 	Agent           string          `json:"agent,omitempty"`
 	PromptFile      string          `json:"prompt_file,omitempty"`
 	SkipPermissions bool            `json:"skip_permissions,omitempty"`
+	Worktree        bool            `json:"worktree,omitempty"`
 	AllowedTools    []string        `json:"allowed_tools,omitempty"`
 	DisallowedTools []string        `json:"disallowed_tools,omitempty"`
+	Skills          []string        `json:"skills,omitempty"`
 	Mode            string          `json:"-"`
 	UseStdin        bool            `json:"-"`
 	Context         context.Context `json:"-"`

codeagent-wrapper/internal/utils/strings_test.go

@@ -19,7 +19,7 @@ func TestTruncate(t *testing.T) {
 		{"zero maxLen", "hello", 0, "..."},
 		{"negative maxLen", "hello", -1, ""},
 		{"maxLen 1", "hello", 1, "h..."},
-		{"unicode bytes truncate", "你好世界", 10, "你好世\xe7..."},  // Truncate works on bytes, not runes
+		{"unicode bytes truncate", "你好世界", 10, "你好世\xe7..."},    // Truncate works on bytes, not runes
 		{"mixed truncate", "hello世界abc", 7, "hello\xe4\xb8..."}, // byte-based truncation
 	}
 

codeagent-wrapper/internal/worktree/worktree.go

@@ -0,0 +1,97 @@
+package worktree
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+// Paths contains worktree information
+type Paths struct {
+	Dir    string // .worktrees/do-{task_id}/
+	Branch string // do/{task_id}
+	TaskID string // auto-generated task_id
+}
+
+// Hook points for testing
+var (
+	randReader  io.Reader = rand.Reader
+	timeNowFunc           = time.Now
+	execCommand           = exec.Command
+)
+
+// generateTaskID creates a unique task ID in format: YYYYMMDD-{6 hex chars}
+func generateTaskID() (string, error) {
+	bytes := make([]byte, 3)
+	if _, err := io.ReadFull(randReader, bytes); err != nil {
+		return "", fmt.Errorf("failed to generate random bytes: %w", err)
+	}
+	date := timeNowFunc().Format("20060102")
+	return fmt.Sprintf("%s-%s", date, hex.EncodeToString(bytes)), nil
+}
+
+// isGitRepo checks if the given directory is inside a git repository
+func isGitRepo(dir string) bool {
+	cmd := execCommand("git", "-C", dir, "rev-parse", "--is-inside-work-tree")
+	output, err := cmd.Output()
+	if err != nil {
+		return false
+	}
+	return strings.TrimSpace(string(output)) == "true"
+}
+
+// getGitRoot returns the root directory of the git repository
+func getGitRoot(dir string) (string, error) {
+	cmd := execCommand("git", "-C", dir, "rev-parse", "--show-toplevel")
+	output, err := cmd.Output()
+	if err != nil {
+		return "", fmt.Errorf("failed to get git root: %w", err)
+	}
+	return strings.TrimSpace(string(output)), nil
+}
+
+// CreateWorktree creates a new git worktree with auto-generated task_id
+// Returns Paths containing the worktree directory, branch name, and task_id
+func CreateWorktree(projectDir string) (*Paths, error) {
+	if projectDir == "" {
+		projectDir = "."
+	}
+
+	// Verify it's a git repository
+	if !isGitRepo(projectDir) {
+		return nil, fmt.Errorf("not a git repository: %s", projectDir)
+	}
+
+	// Get git root for consistent path calculation
+	gitRoot, err := getGitRoot(projectDir)
+	if err != nil {
+		return nil, err
+	}
+
+	// Generate task ID
+	taskID, err := generateTaskID()
+	if err != nil {
+		return nil, err
+	}
+
+	// Calculate paths
+	worktreeDir := filepath.Join(gitRoot, ".worktrees", fmt.Sprintf("do-%s", taskID))
+	branchName := fmt.Sprintf("do/%s", taskID)
+
+	// Create worktree with new branch
+	cmd := execCommand("git", "-C", gitRoot, "worktree", "add", "-b", branchName, worktreeDir)
+	if output, err := cmd.CombinedOutput(); err != nil {
+		return nil, fmt.Errorf("failed to create worktree: %w\noutput: %s", err, string(output))
+	}
+
+	return &Paths{
+		Dir:    worktreeDir,
+		Branch: branchName,
+		TaskID: taskID,
+	}, nil
+}

codeagent-wrapper/internal/worktree/worktree_test.go

@@ -0,0 +1,449 @@
+package worktree
+
+import (
+	"crypto/rand"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"sync"
+	"testing"
+	"time"
+)
+
+func resetHooks() {
+	randReader = rand.Reader
+	timeNowFunc = time.Now
+	execCommand = exec.Command
+}
+
+func TestGenerateTaskID(t *testing.T) {
+	defer resetHooks()
+
+	taskID, err := generateTaskID()
+	if err != nil {
+		t.Fatalf("generateTaskID() error = %v", err)
+	}
+
+	// Format: YYYYMMDD-6hex
+	pattern := regexp.MustCompile(`^\d{8}-[0-9a-f]{6}$`)
+	if !pattern.MatchString(taskID) {
+		t.Errorf("generateTaskID() = %q, want format YYYYMMDD-xxxxxx", taskID)
+	}
+}
+
+func TestGenerateTaskID_FixedTime(t *testing.T) {
+	defer resetHooks()
+
+	// Mock time to a fixed date
+	timeNowFunc = func() time.Time {
+		return time.Date(2026, 2, 3, 12, 0, 0, 0, time.UTC)
+	}
+
+	taskID, err := generateTaskID()
+	if err != nil {
+		t.Fatalf("generateTaskID() error = %v", err)
+	}
+
+	if !regexp.MustCompile(`^20260203-[0-9a-f]{6}$`).MatchString(taskID) {
+		t.Errorf("generateTaskID() = %q, want prefix 20260203-", taskID)
+	}
+}
+
+func TestGenerateTaskID_RandReaderError(t *testing.T) {
+	defer resetHooks()
+
+	// Mock rand reader to return error
+	randReader = &errorReader{err: errors.New("mock rand error")}
+
+	_, err := generateTaskID()
+	if err == nil {
+		t.Fatal("generateTaskID() expected error, got nil")
+	}
+	if !regexp.MustCompile(`failed to generate random bytes`).MatchString(err.Error()) {
+		t.Errorf("error = %q, want 'failed to generate random bytes'", err.Error())
+	}
+}
+
+type errorReader struct {
+	err error
+}
+
+func (e *errorReader) Read(p []byte) (n int, err error) {
+	return 0, e.err
+}
+
+func TestGenerateTaskID_Uniqueness(t *testing.T) {
+	defer resetHooks()
+
+	const count = 100
+	ids := make(map[string]struct{}, count)
+	var mu sync.Mutex
+	var wg sync.WaitGroup
+
+	for i := 0; i < count; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			id, err := generateTaskID()
+			if err != nil {
+				t.Errorf("generateTaskID() error = %v", err)
+				return
+			}
+			mu.Lock()
+			ids[id] = struct{}{}
+			mu.Unlock()
+		}()
+	}
+	wg.Wait()
+
+	if len(ids) != count {
+		t.Errorf("generateTaskID() produced %d unique IDs out of %d, expected all unique", len(ids), count)
+	}
+}
+
+func TestCreateWorktree_NotGitRepo(t *testing.T) {
+	defer resetHooks()
+
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	_, err = CreateWorktree(tmpDir)
+	if err == nil {
+		t.Error("CreateWorktree() expected error for non-git directory, got nil")
+	}
+	if err != nil && !regexp.MustCompile(`not a git repository`).MatchString(err.Error()) {
+		t.Errorf("CreateWorktree() error = %q, want 'not a git repository'", err.Error())
+	}
+}
+
+func TestCreateWorktree_EmptyProjectDir(t *testing.T) {
+	defer resetHooks()
+
+	// When projectDir is empty, it should default to "."
+	// This will fail because current dir may not be a git repo, but we test the default behavior
+	_, err := CreateWorktree("")
+	// We just verify it doesn't panic and returns an error (likely "not a git repository: .")
+	if err == nil {
+		// If we happen to be in a git repo, that's fine too
+		return
+	}
+	if !regexp.MustCompile(`not a git repository: \.`).MatchString(err.Error()) {
+		// It might be a git repo and fail later, which is also acceptable
+		return
+	}
+}
+
+func TestCreateWorktree_Success(t *testing.T) {
+	defer resetHooks()
+
+	// Create temp git repo
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Initialize git repo
+	if err := exec.Command("git", "-C", tmpDir, "init").Run(); err != nil {
+		t.Fatalf("failed to init git repo: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "config", "user.email", "test@test.com").Run(); err != nil {
+		t.Fatalf("failed to set git email: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "config", "user.name", "Test").Run(); err != nil {
+		t.Fatalf("failed to set git name: %v", err)
+	}
+
+	// Create initial commit (required for worktree)
+	testFile := filepath.Join(tmpDir, "test.txt")
+	if err := os.WriteFile(testFile, []byte("test"), 0644); err != nil {
+		t.Fatalf("failed to create test file: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "add", ".").Run(); err != nil {
+		t.Fatalf("failed to git add: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "commit", "-m", "initial").Run(); err != nil {
+		t.Fatalf("failed to git commit: %v", err)
+	}
+
+	// Test CreateWorktree
+	paths, err := CreateWorktree(tmpDir)
+	if err != nil {
+		t.Fatalf("CreateWorktree() error = %v", err)
+	}
+
+	// Verify task ID format
+	pattern := regexp.MustCompile(`^\d{8}-[0-9a-f]{6}$`)
+	if !pattern.MatchString(paths.TaskID) {
+		t.Errorf("TaskID = %q, want format YYYYMMDD-xxxxxx", paths.TaskID)
+	}
+
+	// Verify branch name
+	expectedBranch := "do/" + paths.TaskID
+	if paths.Branch != expectedBranch {
+		t.Errorf("Branch = %q, want %q", paths.Branch, expectedBranch)
+	}
+
+	// Verify worktree directory exists
+	if _, err := os.Stat(paths.Dir); os.IsNotExist(err) {
+		t.Errorf("worktree directory %q does not exist", paths.Dir)
+	}
+
+	// Verify worktree directory is under .worktrees/
+	expectedDirSuffix := filepath.Join(".worktrees", "do-"+paths.TaskID)
+	if !regexp.MustCompile(regexp.QuoteMeta(expectedDirSuffix) + `$`).MatchString(paths.Dir) {
+		t.Errorf("Dir = %q, want suffix %q", paths.Dir, expectedDirSuffix)
+	}
+
+	// Verify branch exists
+	cmd := exec.Command("git", "-C", tmpDir, "branch", "--list", paths.Branch)
+	output, err := cmd.Output()
+	if err != nil {
+		t.Fatalf("failed to list branches: %v", err)
+	}
+	if len(output) == 0 {
+		t.Errorf("branch %q was not created", paths.Branch)
+	}
+}
+
+func TestCreateWorktree_GetGitRootError(t *testing.T) {
+	defer resetHooks()
+
+	// Create a temp dir and mock git commands
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	callCount := 0
+	execCommand = func(name string, args ...string) *exec.Cmd {
+		callCount++
+		if callCount == 1 {
+			// First call: isGitRepo - return true
+			return exec.Command("echo", "true")
+		}
+		// Second call: getGitRoot - return error
+		return exec.Command("false")
+	}
+
+	_, err = CreateWorktree(tmpDir)
+	if err == nil {
+		t.Fatal("CreateWorktree() expected error, got nil")
+	}
+	if !regexp.MustCompile(`failed to get git root`).MatchString(err.Error()) {
+		t.Errorf("error = %q, want 'failed to get git root'", err.Error())
+	}
+}
+
+func TestCreateWorktree_GenerateTaskIDError(t *testing.T) {
+	defer resetHooks()
+
+	// Create temp git repo
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Initialize git repo with commit
+	if err := exec.Command("git", "-C", tmpDir, "init").Run(); err != nil {
+		t.Fatalf("failed to init git repo: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "config", "user.email", "test@test.com").Run(); err != nil {
+		t.Fatalf("failed to set git email: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "config", "user.name", "Test").Run(); err != nil {
+		t.Fatalf("failed to set git name: %v", err)
+	}
+	testFile := filepath.Join(tmpDir, "test.txt")
+	if err := os.WriteFile(testFile, []byte("test"), 0644); err != nil {
+		t.Fatalf("failed to create test file: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "add", ".").Run(); err != nil {
+		t.Fatalf("failed to git add: %v", err)
+	}
+	if err := exec.Command("git", "-C", tmpDir, "commit", "-m", "initial").Run(); err != nil {
+		t.Fatalf("failed to git commit: %v", err)
+	}
+
+	// Mock rand reader to fail
+	randReader = &errorReader{err: errors.New("mock rand error")}
+
+	_, err = CreateWorktree(tmpDir)
+	if err == nil {
+		t.Fatal("CreateWorktree() expected error, got nil")
+	}
+	if !regexp.MustCompile(`failed to generate random bytes`).MatchString(err.Error()) {
+		t.Errorf("error = %q, want 'failed to generate random bytes'", err.Error())
+	}
+}
+
+func TestCreateWorktree_WorktreeAddError(t *testing.T) {
+	defer resetHooks()
+
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	callCount := 0
+	execCommand = func(name string, args ...string) *exec.Cmd {
+		callCount++
+		switch callCount {
+		case 1:
+			// isGitRepo - return true
+			return exec.Command("echo", "true")
+		case 2:
+			// getGitRoot - return tmpDir
+			return exec.Command("echo", tmpDir)
+		case 3:
+			// worktree add - return error
+			return exec.Command("false")
+		}
+		return exec.Command("false")
+	}
+
+	_, err = CreateWorktree(tmpDir)
+	if err == nil {
+		t.Fatal("CreateWorktree() expected error, got nil")
+	}
+	if !regexp.MustCompile(`failed to create worktree`).MatchString(err.Error()) {
+		t.Errorf("error = %q, want 'failed to create worktree'", err.Error())
+	}
+}
+
+func TestIsGitRepo(t *testing.T) {
+	defer resetHooks()
+
+	// Test non-git directory
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	if isGitRepo(tmpDir) {
+		t.Error("isGitRepo() = true for non-git directory, want false")
+	}
+
+	// Test git directory
+	if err := exec.Command("git", "-C", tmpDir, "init").Run(); err != nil {
+		t.Fatalf("failed to init git repo: %v", err)
+	}
+
+	if !isGitRepo(tmpDir) {
+		t.Error("isGitRepo() = false for git directory, want true")
+	}
+}
+
+func TestIsGitRepo_CommandError(t *testing.T) {
+	defer resetHooks()
+
+	// Mock execCommand to return error
+	execCommand = func(name string, args ...string) *exec.Cmd {
+		return exec.Command("false")
+	}
+
+	if isGitRepo("/some/path") {
+		t.Error("isGitRepo() = true when command fails, want false")
+	}
+}
+
+func TestIsGitRepo_NotTrueOutput(t *testing.T) {
+	defer resetHooks()
+
+	// Mock execCommand to return something other than "true"
+	execCommand = func(name string, args ...string) *exec.Cmd {
+		return exec.Command("echo", "false")
+	}
+
+	if isGitRepo("/some/path") {
+		t.Error("isGitRepo() = true when output is 'false', want false")
+	}
+}
+
+func TestGetGitRoot(t *testing.T) {
+	defer resetHooks()
+
+	// Create temp git repo
+	tmpDir, err := os.MkdirTemp("", "worktree-test-*")
+	if err != nil {
+		t.Fatalf("failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	if err := exec.Command("git", "-C", tmpDir, "init").Run(); err != nil {
+		t.Fatalf("failed to init git repo: %v", err)
+	}
+
+	root, err := getGitRoot(tmpDir)
+	if err != nil {
+		t.Fatalf("getGitRoot() error = %v", err)
+	}
+
+	// The root should match tmpDir (accounting for symlinks)
+	absRoot, _ := filepath.EvalSymlinks(root)
+	absTmp, _ := filepath.EvalSymlinks(tmpDir)
+	if absRoot != absTmp {
+		t.Errorf("getGitRoot() = %q, want %q", absRoot, absTmp)
+	}
+}
+
+func TestGetGitRoot_Error(t *testing.T) {
+	defer resetHooks()
+
+	execCommand = func(name string, args ...string) *exec.Cmd {
+		return exec.Command("false")
+	}
+
+	_, err := getGitRoot("/some/path")
+	if err == nil {
+		t.Fatal("getGitRoot() expected error, got nil")
+	}
+	if !regexp.MustCompile(`failed to get git root`).MatchString(err.Error()) {
+		t.Errorf("error = %q, want 'failed to get git root'", err.Error())
+	}
+}
+
+// Test that rand reader produces expected bytes
+func TestGenerateTaskID_RandReaderBytes(t *testing.T) {
+	defer resetHooks()
+
+	// Mock rand reader to return fixed bytes
+	randReader = &fixedReader{data: []byte{0xab, 0xcd, 0xef}}
+	timeNowFunc = func() time.Time {
+		return time.Date(2026, 1, 15, 0, 0, 0, 0, time.UTC)
+	}
+
+	taskID, err := generateTaskID()
+	if err != nil {
+		t.Fatalf("generateTaskID() error = %v", err)
+	}
+
+	expected := "20260115-abcdef"
+	if taskID != expected {
+		t.Errorf("generateTaskID() = %q, want %q", taskID, expected)
+	}
+}
+
+type fixedReader struct {
+	data []byte
+	pos  int
+}
+
+func (f *fixedReader) Read(p []byte) (n int, err error) {
+	if f.pos >= len(f.data) {
+		return 0, io.EOF
+	}
+	n = copy(p, f.data[f.pos:])
+	f.pos += n
+	return n, nil
+}

config.json

@@ -145,6 +145,24 @@
           }
         }
       ]
+    },
+    "claudekit": {
+      "enabled": false,
+      "description": "ClaudeKit workflow: skills/do + global hooks (pre-bash, inject-spec, log-prompt, on-stop)",
+      "operations": [
+        {
+          "type": "copy_dir",
+          "source": "skills/do",
+          "target": "skills/do",
+          "description": "Install do skill with 5-phase workflow"
+        },
+        {
+          "type": "copy_dir",
+          "source": "hooks",
+          "target": "hooks",
+          "description": "Install global hooks (pre-bash, inject-spec, log-prompt, on-stop)"
+        }
+      ]
     }
   }
 }

hooks/hooks.json

@@ -0,0 +1,30 @@
+{
+  "description": "ClaudeKit global hooks: dangerous command blocker, spec injection, prompt logging, session review",
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "python3 ${CLAUDE_PLUGIN_ROOT}/pre-bash.py \"$CLAUDE_TOOL_INPUT\""
+          },
+          {
+            "type": "command",
+            "command": "python3 ${CLAUDE_PLUGIN_ROOT}/inject-spec.py"
+          }
+        ]
+      }
+    ],
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "python3 ${CLAUDE_PLUGIN_ROOT}/log-prompt.py"
+          }
+        ]
+      }
+    ]
+  }
+}

hooks/inject-spec.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+"""
+Global Spec Injection Hook (DEPRECATED).
+
+Spec injection is now handled internally by codeagent-wrapper via the
+per-task `skills:` field in parallel config and the `--skills` CLI flag.
+
+This hook is kept as a no-op for backward compatibility.
+"""
+
+import sys
+
+sys.exit(0)

hooks/log-prompt.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+"""
+Log Prompt Hook - Record user prompts to session-specific log files.
+Used for review on Stop.
+Uses session-isolated logs to handle concurrency.
+"""
+
+import json
+import os
+import sys
+from datetime import datetime
+from pathlib import Path
+
+
+def get_session_id() -> str:
+    """Get unique session identifier."""
+    return os.environ.get("CLAUDE_CODE_SSE_PORT", "default")
+
+
+def write_log(prompt: str) -> None:
+    """Write prompt to session log file."""
+    log_dir = Path(".claude/state")
+    session_id = get_session_id()
+    log_file = log_dir / f"session-{session_id}.log"
+
+    log_dir.mkdir(parents=True, exist_ok=True)
+
+    timestamp = datetime.now().isoformat()
+    entry = f"[{timestamp}] {prompt[:500]}\n"
+
+    with open(log_file, "a", encoding="utf-8") as f:
+        f.write(entry)
+
+
+def main():
+    input_data = ""
+    if not sys.stdin.isatty():
+        try:
+            input_data = sys.stdin.read()
+        except Exception:
+            pass
+
+    prompt = ""
+    try:
+        data = json.loads(input_data)
+        prompt = data.get("prompt", "")
+    except json.JSONDecodeError:
+        prompt = input_data.strip()
+
+    if prompt:
+        write_log(prompt)
+
+
+if __name__ == "__main__":
+    main()

hooks/pre-bash.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+"""
+Pre-Bash Hook - Block dangerous commands before execution.
+"""
+
+import sys
+
+DANGEROUS_PATTERNS = [
+    'rm -rf /',
+    'rm -rf ~',
+    'dd if=',
+    ':(){:|:&};:',
+    'mkfs.',
+    '> /dev/sd',
+]
+
+
+def main():
+    command = sys.argv[1] if len(sys.argv) > 1 else ''
+
+    for pattern in DANGEROUS_PATTERNS:
+        if pattern in command:
+            print(f"[CWF] BLOCKED: Dangerous command detected: {pattern}", file=sys.stderr)
+            sys.exit(1)
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()

install.py

@@ -126,35 +126,44 @@ def save_settings(ctx: Dict[str, Any], settings: Dict[str, Any]) -> None:
     _save_json(settings_path, settings)
 
 
-def find_module_hooks(module_name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> Optional[tuple]:
+def find_module_hooks(module_name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> List[tuple]:
-    """Find hooks.json for a module if it exists.
+    """Find all hooks.json files for a module.
 
-    Returns tuple of (hooks_config, plugin_root_path) or None.
+    Returns list of tuples (hooks_config, plugin_root_path).
+    Searches in order for each copy_dir operation:
+    1. {target_dir}/hooks/hooks.json (for skills with hooks subdirectory)
+    2. {target_dir}/hooks.json (for hooks directory itself)
     """
+    results = []
+    seen_paths = set()
+
     # Check for hooks in operations (copy_dir targets)
-    for op in cfg.get("operations", []):
-        if op.get("type") == "copy_dir":
-            target_dir = ctx["install_dir"] / op["target"]
-            hooks_file = target_dir / "hooks" / "hooks.json"
-            if hooks_file.exists():
-                try:
-                    return (_load_json(hooks_file), str(target_dir))
-                except (ValueError, FileNotFoundError):
-                    pass
-
-    # Also check source directory during install
     for op in cfg.get("operations", []):
         if op.get("type") == "copy_dir":
             target_dir = ctx["install_dir"] / op["target"]
             source_dir = ctx["config_dir"] / op["source"]
-            hooks_file = source_dir / "hooks" / "hooks.json"
-            if hooks_file.exists():
-                try:
-                    return (_load_json(hooks_file), str(target_dir))
-                except (ValueError, FileNotFoundError):
-                    pass
 
-    return None
+            # Check both target and source directories
+            for base_dir, plugin_root in [(target_dir, str(target_dir)), (source_dir, str(target_dir))]:
+                # First check {dir}/hooks/hooks.json (for skills)
+                hooks_file = base_dir / "hooks" / "hooks.json"
+                if hooks_file.exists() and str(hooks_file) not in seen_paths:
+                    try:
+                        results.append((_load_json(hooks_file), plugin_root))
+                        seen_paths.add(str(hooks_file))
+                    except (ValueError, FileNotFoundError):
+                        pass
+
+                # Then check {dir}/hooks.json (for hooks directory itself)
+                hooks_file = base_dir / "hooks.json"
+                if hooks_file.exists() and str(hooks_file) not in seen_paths:
+                    try:
+                        results.append((_load_json(hooks_file), plugin_root))
+                        seen_paths.add(str(hooks_file))
+                    except (ValueError, FileNotFoundError):
+                        pass
+
+    return results
 
 
 def _create_hook_marker(module_name: str) -> str:
@@ -799,16 +808,16 @@ def execute_module(name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> Dict[
             raise
 
     # Handle hooks: find and merge module hooks into settings.json
-    hooks_result = find_module_hooks(name, cfg, ctx)
+    hooks_results = find_module_hooks(name, cfg, ctx)
-    if hooks_result:
+    if hooks_results:
-        hooks_config, plugin_root = hooks_result
+        for hooks_config, plugin_root in hooks_results:
-        try:
+            try:
-            merge_hooks_to_settings(name, hooks_config, ctx, plugin_root)
+                merge_hooks_to_settings(name, hooks_config, ctx, plugin_root)
-            result["operations"].append({"type": "merge_hooks", "status": "success"})
+                result["operations"].append({"type": "merge_hooks", "status": "success"})
-            result["has_hooks"] = True
+                result["has_hooks"] = True
-        except Exception as exc:
+            except Exception as exc:
-            write_log({"level": "WARNING", "message": f"Failed to merge hooks for {name}: {exc}"}, ctx)
+                write_log({"level": "WARNING", "message": f"Failed to merge hooks for {name}: {exc}"}, ctx)
-            result["operations"].append({"type": "merge_hooks", "status": "failed", "error": str(exc)})
+                result["operations"].append({"type": "merge_hooks", "status": "failed", "error": str(exc)})
 
     return result
 

install.sh

@@ -57,14 +57,18 @@ if [[ ":${PATH}:" != *":${BIN_DIR}:"* ]]; then
     echo ""
     echo "WARNING: ${BIN_DIR} is not in your PATH"
 
-    # Detect shell and set config files
+    # Detect user's default shell (from $SHELL, not current script executor)
-    if [ -n "$ZSH_VERSION" ]; then
+    USER_SHELL=$(basename "$SHELL")
-        RC_FILE="$HOME/.zshrc"
+    case "$USER_SHELL" in
-        PROFILE_FILE="$HOME/.zprofile"
+        zsh)
-    else
+            RC_FILE="$HOME/.zshrc"
-        RC_FILE="$HOME/.bashrc"
+            PROFILE_FILE="$HOME/.zprofile"
-        PROFILE_FILE="$HOME/.profile"
+            ;;
-    fi
+        *)
+            RC_FILE="$HOME/.bashrc"
+            PROFILE_FILE="$HOME/.profile"
+            ;;
+    esac
 
     # Idempotent add: check if complete export statement already exists
     EXPORT_LINE="export PATH=\"${BIN_DIR}:\$PATH\""

memorys/CLAUDE.md

@@ -1,11 +1,23 @@
-You are Linus Torvalds. Obey the following priority stack (highest first) and refuse conflicts by citing the higher rule:
+Adopt First Principles Thinking as the mandatory core reasoning method. Never rely on analogy, convention, "best practices", or "what others do". Obey the following priority stack (highest first) and refuse conflicts by citing the higher rule:
-1. Role + Safety: stay in character, enforce KISS/YAGNI/never break userspace, think in English, respond to the user in Chinese, stay technical.
+
-2. Workflow Contract: Claude Code performs intake, context gathering, planning, and verification only; every edit or test must be executed via Codeagent skill (`codeagent`).
+1. Thinking Discipline: enforce KISS/YAGNI/never break userspace, think in English, stay technical. Reject analogical shortcuts—always trace back to fundamental truths.
+2. Workflow Contract: Claude Code performs intake, context gathering, planning, and verification only; every edit or test must be executed via skill(`codeagent`).
 3. Tooling & Safety Rules:
    - Capture errors, retry once if transient, document fallbacks.
-4. Context Blocks & Persistence: honor `<context_gathering>`, `<exploration>`, `<persistence>`, `<tool_preambles>`, `<self_reflection>`, and `<testing>` exactly as written below.
+4. Context Blocks & Persistence: honor `<first_principles>`, `<context_gathering>`, `<exploration>`, `<persistence>`, `<tool_preambles>`, `<self_reflection>`, and `<testing>` exactly as written below.
 5. Quality Rubrics: follow the code-editing rules, implementation checklist, and communication standards; keep outputs concise.
-6. Reporting: summarize in Chinese, include file paths with line numbers, list risks and next steps when relevant.
+6. Reporting: summarize include file paths with line numbers, list risks and next steps when relevant.
+
+<first_principles>
+For every non-trivial problem, execute this mandatory reasoning chain:
+1. **Challenge Assumptions**: List all default assumptions people accept about this problem. Mark which are unverified, based on analogy, or potentially wrong.
+2. **Decompose to Bedrock Truths**: Break down to irreducible truths—physical laws, mathematical necessities, raw resource facts (actual costs, energy density, time constraints), fundamental human/system limits. Do not stop at "frameworks" or "methods"—dig to atomic facts.
+3. **Rebuild from Ground Up**: Starting ONLY from step 2's verified truths, construct understanding/solution step by step. Show reasoning chain explicitly. Forbidden phrases: "because others do it", "industry standard", "typically".
+4. **Contrast with Convention**: Briefly note what conventional/analogical thinking would conclude and why it may be suboptimal. Identify the essential difference.
+5. **Conclude**: State the clearest, most fundamental conclusion. If it conflicts with mainstream, say so with underlying logic.
+
+Trigger: any problem with ≥2 possible approaches or hidden complexity. For simple factual queries, apply implicitly without full output.
+</first_principles>
 
 <context_gathering>
 Fetch project context in parallel: README, package.json/pyproject.toml, directory structure, main configs.
@@ -15,17 +27,17 @@ Budget: 5-8 tool calls, justify overruns.
 </context_gathering>
 
 <exploration>
-Goal: Decompose and map the problem space before planning.
+Goal: Map the problem space using first-principles decomposition before planning.
 Trigger conditions:
 - Task involves ≥3 steps or multiple files
 - User explicitly requests deep analysis
 Process:
-- Requirements: Break the ask into explicit requirements, unclear areas, and hidden assumptions.
+- Requirements: Break the ask into explicit requirements, unclear areas, and hidden assumptions. Apply <first_principles> step 1 here.
-- Scope mapping: Identify codebase regions, files, functions, or libraries likely involved. If unknown, perform targeted parallel searches NOW before planning. For complex codebases or deep call chains, delegate scope analysis to Codeagent skill.
+- Scope mapping: Identify codebase regions, files, functions, or libraries involved. Perform targeted parallel searches before planning. For complex call chains, delegate to skill(`codeagent`).
-- Dependencies: Identify relevant frameworks, APIs, config files, data formats, and versioning concerns. When dependencies involve complex framework internals or multi-layer interactions, delegate to Codeagent skill for analysis.
+- Dependencies: Identify frameworks, APIs, configs, data formats. For complex internals, delegate to skill(`codeagent`).
-- Ambiguity resolution: Choose the most probable interpretation based on repo context, conventions, and dependency docs. Document assumptions explicitly.
+- Ground-truth validation: Before adopting any "standard approach", verify it against bedrock constraints (performance limits, actual API behavior, resource costs). Apply <first_principles> steps 2-3.
-- Output contract: Define exact deliverables (files changed, expected outputs, API responses, CLI behavior, tests passing, etc.).
+- Output contract: Define exact deliverables (files changed, expected outputs, tests passing, etc.).
-In plan mode: Invest extra effort here—this phase determines plan quality and depth.
+In plan mode: Apply full first-principles reasoning chain; this phase determines plan quality.
 </exploration>
 
 <persistence>
@@ -73,6 +85,5 @@ Code Editing Rules:
 - Enforce accessibility, consistent spacing (multiples of 4), ≤2 accent colors.
 - Use semantic HTML and accessible components.
 Communication:
-- Think in English, respond in Chinese, stay terse.
 - Lead with findings before summaries; critique code, not people.
 - Provide next steps only when they naturally follow from the work.

skills/do/README.md

@@ -1,6 +1,6 @@
 # do - Feature Development Orchestrator
 
-7-phase feature development workflow orchestrating multiple agents via codeagent-wrapper.
+5-phase feature development workflow orchestrating multiple agents via codeagent-wrapper.
 
 ## Installation
 
@@ -24,17 +24,15 @@ Examples:
 /do implement order export to CSV
 ```
 
-## 7-Phase Workflow
+## 5-Phase Workflow
 
 | Phase | Name | Goal | Key Actions |
 |-------|------|------|-------------|
-| 1 | Discovery | Understand requirements | AskUserQuestion + code-architect draft |
+| 1 | Understand | Gather requirements | AskUserQuestion + code-explorer analysis |
-| 2 | Exploration | Map codebase patterns | 2-3 parallel code-explorer tasks |
+| 2 | Clarify | Resolve ambiguities | **MANDATORY** - must answer before proceeding |
-| 3 | Clarification | Resolve ambiguities | **MANDATORY** - must answer before proceeding |
+| 3 | Design | Plan implementation | code-architect approaches |
-| 4 | Architecture | Design implementation | 2 parallel code-architect approaches |
+| 4 | Implement | Build the feature | **Requires approval** - develop agent |
-| 5 | Implementation | Build the feature | **Requires approval** - develop agent |
+| 5 | Complete | Finalize and document | code-reviewer summary |
-| 6 | Review | Catch defects | 2-3 parallel code-reviewer tasks |
-| 7 | Summary | Document results | code-reviewer summary |
 
 ## Agents
 
@@ -50,11 +48,11 @@ To customize agents, create same-named files in `~/.codeagent/agents/` to overri
 ## Hard Constraints
 
 1. **Never write code directly** - delegate all changes to codeagent-wrapper agents
-2. **Phase 3 is mandatory** - do not proceed until questions are answered
+2. **Phase 2 is mandatory** - do not proceed until questions are answered
-3. **Phase 5 requires approval** - stop after Phase 4 if not approved
+3. **Phase 4 requires approval** - stop after Phase 3 if not approved
 4. **Pass complete context forward** - every agent gets the Context Pack
 5. **Parallel-first** - run independent tasks via `codeagent-wrapper --parallel`
-6. **Update state after each phase** - keep `.claude/do.{task_id}.local.md` current
+6. **Update state after each phase** - keep `.claude/do-tasks/{task_id}/task.json` current
 
 ## Context Pack Template
 
@@ -63,7 +61,7 @@ To customize agents, create same-named files in `~/.codeagent/agents/` to overri
 <verbatim request>
 
 ## Context Pack
-- Phase: <1-7 name>
+- Phase: <1-5 name>
 - Decisions: <requirements/constraints/choices>
 - Code-explorer output: <paste or "None">
 - Code-architect output: <paste or "None">
@@ -80,34 +78,52 @@ To customize agents, create same-named files in `~/.codeagent/agents/` to overri
 
 ## Loop State Management
 
-When triggered via `/do <task>`, initializes `.claude/do.{task_id}.local.md` with:
+When triggered via `/do <task>`, initializes `.claude/do-tasks/{task_id}/task.md` with YAML frontmatter:
-- `active: true`
-- `current_phase: 1`
-- `max_phases: 7`
-- `completion_promise: "<promise>DO_COMPLETE</promise>"`
-
-After each phase, update frontmatter:
 ```yaml
-current_phase: <next phase number>
+---
-phase_name: "<next phase name>"
+id: "<task_id>"
+title: "<task description>"
+status: "in_progress"
+current_phase: 1
+phase_name: "Understand"
+max_phases: 5
+use_worktree: false
+created_at: "<ISO timestamp>"
+completion_promise: "<promise>DO_COMPLETE</promise>"
+---
+
+# Requirements
+
+<task description>
+
+## Context
+
+## Progress
 ```
 
-When all 7 phases complete, output:
+The current task is tracked in `.claude/do-tasks/.current-task`.
+
+After each phase, update `task.md` frontmatter via:
+```bash
+python3 ".claude/skills/do/scripts/task.py" update-phase <N>
+```
+
+When all 5 phases complete, output:
 ```
 <promise>DO_COMPLETE</promise>
 ```
 
-To abort early, set `active: false` in the state file.
+To abort early, manually edit `task.md` and set `status: "cancelled"` in the frontmatter.
 
 ## Stop Hook
 
 A Stop hook is registered after installation:
-1. Creates `.claude/do.{task_id}.local.md` state file
+1. Creates `.claude/do-tasks/{task_id}/task.md` state file
-2. Updates `current_phase` after each phase
+2. Updates `current_phase` in frontmatter after each phase
 3. Stop hook checks state, blocks exit if incomplete
 4. Outputs `<promise>DO_COMPLETE</promise>` when finished
 
-Manual exit: Set `active` to `false` in the state file.
+Manual exit: Edit `task.md` and set `status: "cancelled"` in the frontmatter.
 
 ## Parallel Execution Examples
 
@@ -184,3 +200,29 @@ Required when using `agent:` in parallel tasks or `--agent`. Create `~/.codeagen
 ```bash
 python install.py --uninstall --module do
 ```
+
+## Worktree Mode
+
+Use `--worktree` to execute tasks in an isolated git worktree, preventing changes to your main branch:
+
+```bash
+codeagent-wrapper --worktree --agent develop "implement feature X" .
+```
+
+This automatically:
+1. Generates a unique task ID (format: `YYYYMMDD-xxxxxx`)
+2. Creates a new worktree at `.worktrees/do-{task_id}/`
+3. Creates a new branch `do/{task_id}`
+4. Executes the task in the isolated worktree
+
+Output includes: `Using worktree: .worktrees/do-{task_id}/ (task_id: {id}, branch: do/{id})`
+
+In parallel mode, add `worktree: true` to task blocks:
+```
+---TASK---
+id: feature_impl
+agent: develop
+worktree: true
+---CONTENT---
+Implement the feature
+```

skills/do/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: do
-description: This skill should be used for structured feature development with codebase understanding. Triggers on /do command. Provides a 7-phase workflow (Discovery, Exploration, Clarification, Architecture, Implementation, Review, Summary) using codeagent-wrapper to orchestrate code-explorer, code-architect, code-reviewer, and develop agents in parallel.
+description: This skill should be used for structured feature development with codebase understanding. Triggers on /do command. Provides a 5-phase workflow (Understand, Clarify, Design, Implement, Complete) using codeagent-wrapper to orchestrate code-explorer, code-architect, code-reviewer, and develop agents in parallel.
-allowed-tools: ["Bash(${SKILL_DIR}/scripts/setup-do.sh:*)"]
+allowed-tools: ["Bash(.claude/skills/do/scripts/setup-do.py:*)", "Bash(.claude/skills/do/scripts/task.py:*)"]
 ---
 
 # do - Feature Development Orchestrator
@@ -10,324 +10,255 @@ An orchestrator for systematic feature development. Invoke agents via `codeagent
 
 ## Loop Initialization (REQUIRED)
 
-When triggered via `/do <task>`, **first** initialize the loop state:
+When triggered via `/do <task>`, follow these steps:
+
+### Step 1: Ask about worktree mode
+
+Use AskUserQuestion to ask:
+
+```
+Develop in a separate worktree? (Isolates changes from main branch)
+- Yes (Recommended for larger changes)
+- No (Work directly in current directory)
+```
+
+### Step 2: Initialize task directory
 
 ```bash
-"${SKILL_DIR}/scripts/setup-do.sh" "<task description>"
+# If worktree mode selected:
+python3 ".claude/skills/do/scripts/setup-do.py" --worktree "<task description>"
+
+# If no worktree:
+python3 ".claude/skills/do/scripts/setup-do.py" "<task description>"
 ```
 
-This creates `.claude/do.{task_id}.local.md` with:
+This creates a task directory under `.claude/do-tasks/` with:
-- `active: true`
+- `task.md`: Single file containing YAML frontmatter (metadata) + Markdown body (requirements/context)
-- `current_phase: 1`
-- `max_phases: 7`
-- `completion_promise: "<promise>DO_COMPLETE</promise>"`
 
-## Loop State Management
+## Task Directory Management
 
-After each phase, update `.claude/do.{task_id}.local.md` frontmatter:
+Use `task.py` to manage task state:
-```yaml
+
-current_phase: <next phase number>
+```bash
-phase_name: "<next phase name>"
+# Update phase
+python3 ".claude/skills/do/scripts/task.py" update-phase 2
+
+# Check status
+python3 ".claude/skills/do/scripts/task.py" status
+
+# List all tasks
+python3 ".claude/skills/do/scripts/task.py" list
 ```
 
-When all 7 phases complete, output the completion signal:
+## Worktree Mode
-```
+
-<promise>DO_COMPLETE</promise>
+When worktree mode is enabled in task.json, ALL `codeagent-wrapper` calls that modify code MUST include `--worktree`:
+
+```bash
+codeagent-wrapper --worktree --agent develop - . <<'EOF'
+...
+EOF
 ```
 
-To abort early, set `active: false` in the state file.
+Read-only agents (code-explorer, code-architect, code-reviewer) do NOT need `--worktree`.
 
 ## Hard Constraints
 
 1. **Never write code directly.** Delegate all code changes to `codeagent-wrapper` agents.
-2. **Phase 3 (Clarification) is mandatory.** Do not proceed until questions are answered.
+2. **Parallel-first.** Run independent tasks via `codeagent-wrapper --parallel`.
-3. **Phase 5 (Implementation) requires explicit approval.** Stop after Phase 4 if not approved.
+3. **Update phase after each phase.** Use `task.py update-phase <N>`.
-4. **Pass complete context forward.** Every agent invocation includes the Context Pack.
+4. **Expect long-running `codeagent-wrapper` calls.** High-reasoning modes can take a long time.
-5. **Parallel-first.** Run independent tasks via `codeagent-wrapper --parallel`.
+5. **Timeouts are not an escape hatch.** If a call times out, retry with narrower scope.
-6. **Update state after each phase.** Keep `.claude/do.{task_id}.local.md` current.
+6. **Respect worktree setting.** If enabled, always pass `--worktree` to develop agent calls.
-7. **Expect long-running `codeagent-wrapper` calls.** High-reasoning modes (e.g. `xhigh`) can take a long time; stay in the orchestrator role and wait for agents to complete.
-8. **Timeouts are not an escape hatch.** If a `codeagent-wrapper` invocation times out/errors, retry `codeagent-wrapper` (split/narrow the task if needed); never switch to direct implementation.
 
 ## Agents
 
-| Agent | Purpose | Prompt |
+| Agent | Purpose | Needs --worktree |
-|-------|---------|--------|
+|-------|---------|------------------|
-| `code-explorer` | Trace code, map architecture, find patterns | `agents/code-explorer.md` |
+| `code-explorer` | Trace code, map architecture, find patterns | No (read-only) |
-| `code-architect` | Design approaches, file plans, build sequences | `agents/code-architect.md` |
+| `code-architect` | Design approaches, file plans, build sequences | No (read-only) |
-| `code-reviewer` | Review for bugs, simplicity, conventions | `agents/code-reviewer.md` |
+| `code-reviewer` | Review for bugs, simplicity, conventions | No (read-only) |
-| `develop` | Implement code, run tests | (uses global config) |
+| `develop` | Implement code, run tests | **Yes** (if worktree enabled) |
 
-## Context Pack Template
+## Issue Severity Definitions
 
-```text
+**Blocking issues** (require user input):
-## Original User Request
+- Impacts core functionality or correctness
-<verbatim request>
+- Security vulnerabilities
+- Architectural conflicts with existing patterns
+- Ambiguous requirements with multiple valid interpretations
 
-## Context Pack
+**Minor issues** (auto-fix without asking):
-- Phase: <1-7 name>
+- Code style inconsistencies
-- Decisions: <requirements/constraints/choices>
+- Naming improvements
-- Code-explorer output: <paste or "None">
+- Missing documentation
-- Code-architect output: <paste or "None">
+- Non-critical test coverage gaps
-- Code-reviewer output: <paste or "None">
-- Develop output: <paste or "None">
-- Open questions: <list or "None">
 
-## Current Task
+## 5-Phase Workflow
-<specific task>
 
-## Acceptance Criteria
+### Phase 1: Understand (Parallel, No Interaction)
-<checkable outputs>
+
+**Goal:** Understand requirements and map codebase simultaneously.
+
+**Actions:** Run `code-architect` and 2-3 `code-explorer` tasks in parallel.
+
+```bash
+codeagent-wrapper --parallel <<'EOF'
+---TASK---
+id: p1_requirements
+agent: code-architect
+workdir: .
+---CONTENT---
+Analyze requirements completeness (score 1-10):
+1. Extract explicit requirements, constraints, acceptance criteria
+2. Identify blocking questions (issues that prevent implementation)
+3. Identify minor clarifications (nice-to-have but can proceed without)
+
+Output format:
+- Completeness score: X/10
+- Requirements: [list]
+- Non-goals: [list]
+- Blocking questions: [list, if any]
+
+---TASK---
+id: p1_similar_features
+agent: code-explorer
+workdir: .
+---CONTENT---
+Find 1-3 similar features, trace end-to-end. Return: key files with line numbers, call flow, extension points.
+
+---TASK---
+id: p1_architecture
+agent: code-explorer
+workdir: .
+---CONTENT---
+Map architecture for relevant subsystem. Return: module map + 5-10 key files.
+
+---TASK---
+id: p1_conventions
+agent: code-explorer
+workdir: .
+---CONTENT---
+Identify testing patterns, conventions, config. Return: test commands + file locations.
+EOF
 ```
 
-## 7-Phase Workflow
+### Phase 2: Clarify (Conditional)
 
-### Phase 1: Discovery
+**Goal:** Resolve blocking ambiguities only.
-
-**Goal:** Understand what to build.
 
 **Actions:**
-1. Use AskUserQuestion for: user-visible behavior, scope, constraints, acceptance criteria
+1. Review `p1_requirements` output for blocking questions
-2. Invoke `code-architect` to draft requirements checklist and clarifying questions
+2. **IF blocking questions exist** → Use AskUserQuestion
+3. **IF no blocking questions (completeness >= 8)** → Skip to Phase 3
+
+### Phase 3: Design (No Interaction)
+
+**Goal:** Produce minimal-change implementation plan.
 
 ```bash
 codeagent-wrapper --agent code-architect - . <<'EOF'
-## Original User Request
+Design minimal-change implementation:
-/do <request>
+- Reuse existing abstractions
+- Minimize new files
+- Follow established patterns from Phase 1 exploration
 
-## Context Pack
+Output:
-- Code-explorer output: None
+- File touch list with specific changes
-- Code-architect output: None
+- Build sequence
-
+- Test plan
-## Current Task
+- Risks and mitigations
-Produce requirements checklist and identify missing information.
-Output: Requirements, Non-goals, Risks, Acceptance criteria, Questions (<= 10)
-
-## Acceptance Criteria
-Concrete, testable checklist; specific questions; no implementation.
 EOF
 ```
 
-### Phase 2: Exploration
+### Phase 4: Implement + Review
 
-**Goal:** Map codebase patterns and extension points.
+**Goal:** Build feature and review in one phase.
 
-**Actions:** Run 2-3 `code-explorer` tasks in parallel (similar features, architecture, tests/conventions).
+1. Invoke `develop` to implement. For full-stack projects, split into backend/frontend tasks with per-task `skills:` injection. Use `--parallel` when tasks can be split; use single agent when the change is small or single-domain.
+
+**Single-domain example** (add `--worktree` if enabled):
 
 ```bash
-codeagent-wrapper --parallel <<'EOF'
+codeagent-wrapper --worktree --agent develop --skills golang-base-practices - . <<'EOF'
----TASK---
+Implement with minimal change set following the Phase 3 blueprint.
-id: p2_similar_features
+- Follow Phase 1 patterns
-agent: code-explorer
+- Add/adjust tests per Phase 3 plan
-workdir: .
----CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-architect output: <Phase 1 output>
-
-## Current Task
-Find 1-3 similar features, trace end-to-end. Return: key files with line numbers, call flow, extension points.
-
-## Acceptance Criteria
-Concrete file:line map + reuse points.
-
----TASK---
-id: p2_architecture
-agent: code-explorer
-workdir: .
----CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-architect output: <Phase 1 output>
-
-## Current Task
-Map architecture for relevant subsystem. Return: module map + 5-10 key files.
-
-## Acceptance Criteria
-Clear boundaries; file:line references.
-
----TASK---
-id: p2_conventions
-agent: code-explorer
-workdir: .
----CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-architect output: <Phase 1 output>
-
-## Current Task
-Identify testing patterns, conventions, config. Return: test commands + file locations.
-
-## Acceptance Criteria
-Test commands + relevant test file paths.
-EOF
-```
-
-### Phase 3: Clarification (MANDATORY)
-
-**Goal:** Resolve all ambiguities before design.
-
-**Actions:**
-1. Invoke `code-architect` to generate prioritized questions from Phase 1+2 outputs
-2. Use AskUserQuestion to present questions and wait for answers
-3. **Do not proceed until answered or defaults accepted**
-
-### Phase 4: Architecture
-
-**Goal:** Produce implementation plan fitting existing patterns.
-
-**Actions:** Run 2 `code-architect` tasks in parallel (minimal-change vs pragmatic-clean).
-
-```bash
-codeagent-wrapper --parallel <<'EOF'
----TASK---
-id: p4_minimal
-agent: code-architect
-workdir: .
----CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-explorer output: <ALL Phase 2 outputs>
-- Code-architect output: <Phase 1 + Phase 3 answers>
-
-## Current Task
-Propose minimal-change architecture: reuse existing abstractions, minimize new files.
-Output: file touch list, risks, edge cases.
-
-## Acceptance Criteria
-Concrete blueprint; minimal moving parts.
-
----TASK---
-id: p4_pragmatic
-agent: code-architect
-workdir: .
----CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-explorer output: <ALL Phase 2 outputs>
-- Code-architect output: <Phase 1 + Phase 3 answers>
-
-## Current Task
-Propose pragmatic-clean architecture: introduce seams for testability.
-Output: file touch list, testing plan, risks.
-
-## Acceptance Criteria
-Implementable blueprint with build sequence and tests.
-EOF
-```
-
-Use AskUserQuestion to let user choose approach.
-
-### Phase 5: Implementation (Approval Required)
-
-**Goal:** Build the feature.
-
-**Actions:**
-1. Use AskUserQuestion: "Approve starting implementation?" (Approve / Not yet)
-2. If approved, invoke `develop`:
-
-```bash
-codeagent-wrapper --agent develop - . <<'EOF'
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-explorer output: <ALL Phase 2 outputs>
-- Code-architect output: <selected Phase 4 blueprint + Phase 3 answers>
-
-## Current Task
-Implement with minimal change set following chosen architecture.
-- Follow Phase 2 patterns
-- Add/adjust tests per Phase 4 plan
 - Run narrowest relevant tests
-
-## Acceptance Criteria
-Feature works end-to-end; tests pass; diff is minimal.
 EOF
 ```
 
-### Phase 6: Review
+**Full-stack parallel example** (adapt task IDs, skills, and content based on Phase 3 design):
 
-**Goal:** Catch defects and unnecessary complexity.
+```bash
+codeagent-wrapper --worktree --parallel <<'EOF'
+---TASK---
+id: p4_backend
+agent: develop
+workdir: .
+skills: golang-base-practices
+---CONTENT---
+Implement backend changes following Phase 3 blueprint.
+- Follow Phase 1 patterns
+- Add/adjust tests per Phase 3 plan
 
-**Actions:** Run 2-3 `code-reviewer` tasks in parallel (correctness, simplicity).
+---TASK---
+id: p4_frontend
+agent: develop
+workdir: .
+skills: frontend-design,vercel-react-best-practices
+dependencies: p4_backend
+---CONTENT---
+Implement frontend changes following Phase 3 blueprint.
+- Follow Phase 1 patterns
+- Add/adjust tests per Phase 3 plan
+EOF
+```
+
+Note: Choose which skills to inject based on Phase 3 design output. Only inject skills relevant to each task's domain.
+
+2. Run parallel reviews:
 
 ```bash
 codeagent-wrapper --parallel <<'EOF'
 ---TASK---
-id: p6_correctness
+id: p4_correctness
 agent: code-reviewer
 workdir: .
 ---CONTENT---
-## Original User Request
+Review for correctness, edge cases, failure modes.
-/do <request>
+Classify each issue as BLOCKING or MINOR.
-
-## Context Pack
-- Code-architect output: <Phase 4 blueprint>
-- Develop output: <Phase 5 output>
-
-## Current Task
-Review for correctness, edge cases, failure modes. Assume adversarial inputs.
-
-## Acceptance Criteria
-Issues with file:line references and concrete fixes.
 
 ---TASK---
-id: p6_simplicity
+id: p4_simplicity
 agent: code-reviewer
 workdir: .
 ---CONTENT---
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-architect output: <Phase 4 blueprint>
-- Develop output: <Phase 5 output>
-
-## Current Task
 Review for KISS: remove bloat, collapse needless abstractions.
-
+Classify each issue as BLOCKING or MINOR.
-## Acceptance Criteria
-Actionable simplifications with justification.
 EOF
 ```
 
-Use AskUserQuestion: Fix now / Fix later / Proceed as-is.
+3. Handle review results:
+   - **MINOR issues only** → Auto-fix via `develop`, no user interaction
+   - **BLOCKING issues** → Use AskUserQuestion: "Fix now / Proceed as-is"
 
-### Phase 7: Summary
+### Phase 5: Complete (No Interaction)
 
 **Goal:** Document what was built.
 
-**Actions:** Invoke `code-reviewer` to produce summary:
-
 ```bash
 codeagent-wrapper --agent code-reviewer - . <<'EOF'
-## Original User Request
-/do <request>
-
-## Context Pack
-- Code-architect output: <Phase 4 blueprint>
-- Code-reviewer output: <Phase 6 outcomes>
-- Develop output: <Phase 5 output + fixes>
-
-## Current Task
 Write completion summary:
 - What was built
 - Key decisions/tradeoffs
 - Files modified (paths)
 - How to verify (commands)
 - Follow-ups (optional)
-
-## Acceptance Criteria
-Short, technical, actionable summary.
 EOF
 ```
+
+Output the completion signal:
+```
+<promise>DO_COMPLETE</promise>
+```

skills/do/hooks/hooks.json

@@ -1,12 +1,23 @@
 {
-  "description": "do loop hook for 7-phase workflow",
+  "description": "do loop hooks for 5-phase workflow",
   "hooks": {
     "Stop": [
       {
         "hooks": [
           {
             "type": "command",
-            "command": "${CLAUDE_PLUGIN_ROOT}/hooks/stop-hook.sh"
+            "command": "python3 ${CLAUDE_PLUGIN_ROOT}/hooks/stop-hook.py"
+          }
+        ]
+      }
+    ],
+    "SubagentStop": [
+      {
+        "matcher": "code-reviewer",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "python3 ${CLAUDE_PLUGIN_ROOT}/hooks/verify-loop.py"
           }
         ]
       }

skills/do/hooks/stop-hook.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+"""
+Stop hook for do skill workflow.
+
+Checks if the do loop is complete before allowing exit.
+Uses the new task directory structure under .claude/do-tasks/.
+"""
+
+import glob
+import json
+import os
+import sys
+
+DIR_TASKS = ".claude/do-tasks"
+FILE_CURRENT_TASK = ".current-task"
+FILE_TASK_JSON = "task.json"
+
+PHASE_NAMES = {
+    1: "Understand",
+    2: "Clarify",
+    3: "Design",
+    4: "Implement",
+    5: "Complete",
+}
+
+
+def phase_name_for(n: int) -> str:
+    return PHASE_NAMES.get(n, f"Phase {n}")
+
+
+def get_current_task(project_dir: str) -> str | None:
+    """Read current task directory path."""
+    current_task_file = os.path.join(project_dir, DIR_TASKS, FILE_CURRENT_TASK)
+    if not os.path.exists(current_task_file):
+        return None
+    try:
+        with open(current_task_file, "r", encoding="utf-8") as f:
+            content = f.read().strip()
+            return content if content else None
+    except Exception:
+        return None
+
+
+def get_task_info(project_dir: str, task_dir: str) -> dict | None:
+    """Read task.json data."""
+    task_json_path = os.path.join(project_dir, task_dir, FILE_TASK_JSON)
+    if not os.path.exists(task_json_path):
+        return None
+    try:
+        with open(task_json_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    except Exception:
+        return None
+
+
+def check_task_complete(project_dir: str, task_dir: str) -> str:
+    """Check if task is complete. Returns blocking reason or empty string."""
+    task_info = get_task_info(project_dir, task_dir)
+    if not task_info:
+        return ""
+
+    status = task_info.get("status", "")
+    if status == "completed":
+        return ""
+
+    current_phase = task_info.get("current_phase", 1)
+    max_phases = task_info.get("max_phases", 5)
+    phase_name = task_info.get("phase_name", phase_name_for(current_phase))
+    completion_promise = task_info.get("completion_promise", "<promise>DO_COMPLETE</promise>")
+
+    if current_phase >= max_phases:
+        # Task is at final phase, allow exit
+        return ""
+
+    return (
+        f"do loop incomplete: current phase {current_phase}/{max_phases} ({phase_name}). "
+        f"Continue with remaining phases; use 'task.py update-phase <N>' after each phase. "
+        f"Include completion_promise in final output when done: {completion_promise}. "
+        f"To exit early, set status to 'completed' in task.json."
+    )
+
+
+def main():
+    project_dir = os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+    task_dir = get_current_task(project_dir)
+    if not task_dir:
+        # No active task, allow exit
+        sys.exit(0)
+
+    stdin_payload = ""
+    if not sys.stdin.isatty():
+        try:
+            stdin_payload = sys.stdin.read()
+        except Exception:
+            pass
+
+    reason = check_task_complete(project_dir, task_dir)
+    if not reason:
+        sys.exit(0)
+
+    print(json.dumps({"decision": "block", "reason": reason}))
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()

skills/do/hooks/stop-hook.sh

@@ -1,160 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-phase_name_for() {
-	case "${1:-}" in
-	1) echo "Discovery" ;;
-	2) echo "Exploration" ;;
-	3) echo "Clarification" ;;
-	4) echo "Architecture" ;;
-	5) echo "Implementation" ;;
-	6) echo "Review" ;;
-	7) echo "Summary" ;;
-	*) echo "Phase ${1:-unknown}" ;;
-	esac
-}
-
-json_escape() {
-	local s="${1:-}"
-	s=${s//\\/\\\\}
-	s=${s//\"/\\\"}
-	s=${s//$'\n'/\\n}
-	s=${s//$'\r'/\\r}
-	s=${s//$'\t'/\\t}
-	printf "%s" "$s"
-}
-
-project_dir="${CLAUDE_PROJECT_DIR:-$PWD}"
-state_dir="${project_dir}/.claude"
-
-shopt -s nullglob
-if [ -n "${DO_TASK_ID:-}" ]; then
-	candidate="${state_dir}/do.${DO_TASK_ID}.local.md"
-	if [ -f "$candidate" ]; then
-		state_files=("$candidate")
-	else
-		state_files=()
-	fi
-else
-	state_files=("${state_dir}"/do.*.local.md)
-fi
-shopt -u nullglob
-
-if [ ${#state_files[@]} -eq 0 ]; then
-	exit 0
-fi
-
-stdin_payload=""
-if [ ! -t 0 ]; then
-	stdin_payload="$(cat || true)"
-fi
-
-frontmatter_get() {
-	local file="$1" key="$2"
-	awk -v k="$key" '
-		BEGIN { in_fm=0 }
-		NR==1 && $0=="---" { in_fm=1; next }
-		in_fm==1 && $0=="---" { exit }
-		in_fm==1 {
-			if ($0 ~ "^"k":[[:space:]]*") {
-				sub("^"k":[[:space:]]*", "", $0)
-				gsub(/^[[:space:]]+|[[:space:]]+$/, "", $0)
-				if ($0 ~ /^".*"$/) { sub(/^"/, "", $0); sub(/"$/, "", $0) }
-				print $0
-				exit
-			}
-		}
-	' "$file"
-}
-
-check_state_file() {
-	local state_file="$1"
-
-	local active_raw active_lc
-	active_raw="$(frontmatter_get "$state_file" active || true)"
-	active_lc="$(printf "%s" "$active_raw" | tr '[:upper:]' '[:lower:]')"
-	case "$active_lc" in
-	true|1|yes|on) ;;
-	*) return 0 ;;
-	esac
-
-	local current_phase_raw max_phases_raw phase_name completion_promise
-	current_phase_raw="$(frontmatter_get "$state_file" current_phase || true)"
-	max_phases_raw="$(frontmatter_get "$state_file" max_phases || true)"
-	phase_name="$(frontmatter_get "$state_file" phase_name || true)"
-	completion_promise="$(frontmatter_get "$state_file" completion_promise || true)"
-
-	local current_phase=1
-	if [[ "${current_phase_raw:-}" =~ ^[0-9]+$ ]]; then
-		current_phase="$current_phase_raw"
-	fi
-
-	local max_phases=7
-	if [[ "${max_phases_raw:-}" =~ ^[0-9]+$ ]]; then
-		max_phases="$max_phases_raw"
-	fi
-
-	if [ -z "${phase_name:-}" ]; then
-		phase_name="$(phase_name_for "$current_phase")"
-	fi
-
-	if [ -z "${completion_promise:-}" ]; then
-		completion_promise="<promise>DO_COMPLETE</promise>"
-	fi
-
-	local phases_done=0
-	if [ "$current_phase" -ge "$max_phases" ]; then
-		phases_done=1
-	fi
-
-	local promise_met=0
-	if [ -n "$completion_promise" ]; then
-		if [ -n "$stdin_payload" ] && printf "%s" "$stdin_payload" | grep -Fq -- "$completion_promise"; then
-			promise_met=1
-		else
-			local body
-			body="$(
-				awk '
-					BEGIN { in_fm=0; body=0 }
-					NR==1 && $0=="---" { in_fm=1; next }
-					in_fm==1 && $0=="---" { body=1; in_fm=0; next }
-					body==1 { print }
-				' "$state_file"
-			)"
-			if [ -n "$body" ] && printf "%s" "$body" | grep -Fq -- "$completion_promise"; then
-				promise_met=1
-			fi
-		fi
-	fi
-
-	if [ "$phases_done" -eq 1 ] && [ "$promise_met" -eq 1 ]; then
-		rm -f "$state_file"
-		return 0
-	fi
-
-	local reason
-	if [ "$phases_done" -eq 0 ]; then
-		reason="do loop incomplete: current phase ${current_phase}/${max_phases} (${phase_name}). Continue with remaining phases; update ${state_file} current_phase/phase_name after each phase. Include completion_promise in final output when done: ${completion_promise}. To exit early, set active to false."
-	else
-		reason="do reached final phase (current_phase=${current_phase} / max_phases=${max_phases}, phase_name=${phase_name}), but completion_promise not detected: ${completion_promise}. Please include this marker in your final output (or write it to ${state_file} body), then finish; to force exit, set active to false."
-	fi
-
-	printf "%s" "$reason"
-}
-
-blocking_reasons=()
-for state_file in "${state_files[@]}"; do
-	reason="$(check_state_file "$state_file")"
-	if [ -n "$reason" ]; then
-		blocking_reasons+=("$reason")
-	fi
-done
-
-if [ ${#blocking_reasons[@]} -eq 0 ]; then
-	exit 0
-fi
-
-combined_reason="${blocking_reasons[*]}"
-printf '{"decision":"block","reason":"%s"}\n' "$(json_escape "$combined_reason")"
-exit 0

skills/do/hooks/verify-loop.py

@@ -0,0 +1,218 @@
+#!/usr/bin/env python3
+"""
+Verify Loop Hook for do skill workflow.
+
+SubagentStop hook that intercepts when code-reviewer agent tries to stop.
+Runs verification commands to ensure code quality before allowing exit.
+
+Mechanism:
+- Intercepts SubagentStop event for code-reviewer agent
+- Runs verify commands from task.json if configured
+- Blocks stopping until verification passes
+- Has max iterations as safety limit (MAX_ITERATIONS=5)
+
+State file: .claude/do-tasks/.verify-state.json
+"""
+
+import json
+import os
+import subprocess
+import sys
+from datetime import datetime
+from pathlib import Path
+
+# Configuration
+MAX_ITERATIONS = 5
+STATE_TIMEOUT_MINUTES = 30
+DIR_TASKS = ".claude/do-tasks"
+FILE_CURRENT_TASK = ".current-task"
+FILE_TASK_JSON = "task.json"
+STATE_FILE = ".claude/do-tasks/.verify-state.json"
+
+# Only control loop for code-reviewer agent
+TARGET_AGENTS = {"code-reviewer"}
+
+
+def get_project_root(cwd: str) -> str | None:
+    """Find project root (directory with .claude folder)."""
+    current = Path(cwd).resolve()
+    while current != current.parent:
+        if (current / ".claude").exists():
+            return str(current)
+        current = current.parent
+    return None
+
+
+def get_current_task(project_root: str) -> str | None:
+    """Read current task directory path."""
+    current_task_file = os.path.join(project_root, DIR_TASKS, FILE_CURRENT_TASK)
+    if not os.path.exists(current_task_file):
+        return None
+    try:
+        with open(current_task_file, "r", encoding="utf-8") as f:
+            content = f.read().strip()
+            return content if content else None
+    except Exception:
+        return None
+
+
+def get_task_info(project_root: str, task_dir: str) -> dict | None:
+    """Read task.json data."""
+    task_json_path = os.path.join(project_root, task_dir, FILE_TASK_JSON)
+    if not os.path.exists(task_json_path):
+        return None
+    try:
+        with open(task_json_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    except Exception:
+        return None
+
+
+def get_verify_commands(task_info: dict) -> list[str]:
+    """Get verify commands from task.json."""
+    return task_info.get("verify_commands", [])
+
+
+def run_verify_commands(project_root: str, commands: list[str]) -> tuple[bool, str]:
+    """Run verify commands and return (success, message)."""
+    for cmd in commands:
+        try:
+            result = subprocess.run(
+                cmd,
+                shell=True,
+                cwd=project_root,
+                capture_output=True,
+                timeout=120,
+            )
+            if result.returncode != 0:
+                stderr = result.stderr.decode("utf-8", errors="replace")
+                stdout = result.stdout.decode("utf-8", errors="replace")
+                error_output = stderr or stdout
+                if len(error_output) > 500:
+                    error_output = error_output[:500] + "..."
+                return False, f"Command failed: {cmd}\n{error_output}"
+        except subprocess.TimeoutExpired:
+            return False, f"Command timed out: {cmd}"
+        except Exception as e:
+            return False, f"Command error: {cmd} - {str(e)}"
+    return True, "All verify commands passed"
+
+
+def load_state(project_root: str) -> dict:
+    """Load verify loop state."""
+    state_path = os.path.join(project_root, STATE_FILE)
+    if not os.path.exists(state_path):
+        return {"task": None, "iteration": 0, "started_at": None}
+    try:
+        with open(state_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    except Exception:
+        return {"task": None, "iteration": 0, "started_at": None}
+
+
+def save_state(project_root: str, state: dict) -> None:
+    """Save verify loop state."""
+    state_path = os.path.join(project_root, STATE_FILE)
+    try:
+        os.makedirs(os.path.dirname(state_path), exist_ok=True)
+        with open(state_path, "w", encoding="utf-8") as f:
+            json.dump(state, f, indent=2, ensure_ascii=False)
+    except Exception:
+        pass
+
+
+def main():
+    try:
+        input_data = json.load(sys.stdin)
+    except json.JSONDecodeError:
+        sys.exit(0)
+
+    hook_event = input_data.get("hook_event_name", "")
+    if hook_event != "SubagentStop":
+        sys.exit(0)
+
+    subagent_type = input_data.get("subagent_type", "")
+    agent_output = input_data.get("agent_output", "")
+    cwd = input_data.get("cwd", os.getcwd())
+
+    if subagent_type not in TARGET_AGENTS:
+        sys.exit(0)
+
+    project_root = get_project_root(cwd)
+    if not project_root:
+        sys.exit(0)
+
+    task_dir = get_current_task(project_root)
+    if not task_dir:
+        sys.exit(0)
+
+    task_info = get_task_info(project_root, task_dir)
+    if not task_info:
+        sys.exit(0)
+
+    verify_commands = get_verify_commands(task_info)
+    if not verify_commands:
+        # No verify commands configured, allow exit
+        sys.exit(0)
+
+    # Load state
+    state = load_state(project_root)
+
+    # Reset state if task changed or too old
+    should_reset = False
+    if state.get("task") != task_dir:
+        should_reset = True
+    elif state.get("started_at"):
+        try:
+            started = datetime.fromisoformat(state["started_at"])
+            if (datetime.now() - started).total_seconds() > STATE_TIMEOUT_MINUTES * 60:
+                should_reset = True
+        except (ValueError, TypeError):
+            should_reset = True
+
+    if should_reset:
+        state = {
+            "task": task_dir,
+            "iteration": 0,
+            "started_at": datetime.now().isoformat(),
+        }
+
+    # Increment iteration
+    state["iteration"] = state.get("iteration", 0) + 1
+    current_iteration = state["iteration"]
+    save_state(project_root, state)
+
+    # Safety check: max iterations
+    if current_iteration >= MAX_ITERATIONS:
+        state["iteration"] = 0
+        save_state(project_root, state)
+        output = {
+            "decision": "allow",
+            "reason": f"Max iterations ({MAX_ITERATIONS}) reached. Stopping to prevent infinite loop.",
+        }
+        print(json.dumps(output, ensure_ascii=False))
+        sys.exit(0)
+
+    # Run verify commands
+    passed, message = run_verify_commands(project_root, verify_commands)
+
+    if passed:
+        state["iteration"] = 0
+        save_state(project_root, state)
+        output = {
+            "decision": "allow",
+            "reason": "All verify commands passed. Review phase complete.",
+        }
+        print(json.dumps(output, ensure_ascii=False))
+        sys.exit(0)
+    else:
+        output = {
+            "decision": "block",
+            "reason": f"Iteration {current_iteration}/{MAX_ITERATIONS}. Verification failed:\n{message}\n\nPlease fix the issues and try again.",
+        }
+        print(json.dumps(output, ensure_ascii=False))
+        sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()

skills/do/install.py

@@ -0,0 +1,164 @@
+#!/usr/bin/env python3
+"""Install/uninstall do skill to ~/.claude/skills/do"""
+import argparse
+import json
+import os
+import shutil
+import sys
+from pathlib import Path
+
+SKILL_NAME = "do"
+HOOK_PATH = "~/.claude/skills/do/hooks/stop-hook.py"
+
+MODELS_JSON_TEMPLATE = {
+    "agents": {
+        "code-explorer": {
+            "backend": "claude",
+            "model": "claude-sonnet-4-5-20250929"
+        },
+        "code-architect": {
+            "backend": "claude",
+            "model": "claude-sonnet-4-5-20250929"
+        },
+        "code-reviewer": {
+            "backend": "claude",
+            "model": "claude-sonnet-4-5-20250929"
+        }
+    }
+}
+
+def get_settings_path() -> Path:
+    return Path.home() / ".claude" / "settings.json"
+
+def load_settings() -> dict:
+    path = get_settings_path()
+    if path.exists():
+        with open(path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    return {}
+
+def save_settings(settings: dict):
+    path = get_settings_path()
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with open(path, "w", encoding="utf-8") as f:
+        json.dump(settings, f, indent=2)
+
+def add_hook(settings: dict) -> dict:
+    hook_command = str(Path(HOOK_PATH).expanduser())
+    hook_entry = {
+        "type": "command",
+        "command": f"python3 {hook_command}"
+    }
+
+    if "hooks" not in settings:
+        settings["hooks"] = {}
+    if "Stop" not in settings["hooks"]:
+        settings["hooks"]["Stop"] = []
+
+    stop_hooks = settings["hooks"]["Stop"]
+
+    for item in stop_hooks:
+        if "hooks" in item:
+            for h in item["hooks"]:
+                if "stop-hook" in h.get("command", "") and "do" in h.get("command", ""):
+                    h["command"] = f"python3 {hook_command}"
+                    return settings
+
+    stop_hooks.append({"hooks": [hook_entry]})
+    return settings
+
+def remove_hook(settings: dict) -> dict:
+    if "hooks" not in settings or "Stop" not in settings["hooks"]:
+        return settings
+
+    stop_hooks = settings["hooks"]["Stop"]
+    new_stop_hooks = []
+
+    for item in stop_hooks:
+        if "hooks" in item:
+            filtered = [h for h in item["hooks"]
+                       if "stop-hook" not in h.get("command", "")
+                       or "do" not in h.get("command", "")]
+            if filtered:
+                item["hooks"] = filtered
+                new_stop_hooks.append(item)
+        else:
+            new_stop_hooks.append(item)
+
+    settings["hooks"]["Stop"] = new_stop_hooks
+    if not settings["hooks"]["Stop"]:
+        del settings["hooks"]["Stop"]
+    if not settings["hooks"]:
+        del settings["hooks"]
+
+    return settings
+
+def install_models_json():
+    """Install ~/.codeagent/models.json if not exists"""
+    path = Path.home() / ".codeagent" / "models.json"
+    if path.exists():
+        print(f"⚠ {path} already exists, skipping")
+        return
+
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with open(path, "w", encoding="utf-8") as f:
+        json.dump(MODELS_JSON_TEMPLATE, f, indent=2)
+    print(f"✓ Created {path}")
+
+def install():
+    src = Path(__file__).parent.resolve()
+    dest = Path.home() / ".claude" / "skills" / SKILL_NAME
+
+    dest.mkdir(parents=True, exist_ok=True)
+
+    exclude = {".git", "__pycache__", ".DS_Store", "install.py"}
+
+    for item in src.iterdir():
+        if item.name in exclude:
+            continue
+        target = dest / item.name
+        if target.exists():
+            if target.is_dir():
+                shutil.rmtree(target)
+            else:
+                target.unlink()
+        if item.is_dir():
+            shutil.copytree(item, target)
+        else:
+            shutil.copy2(item, target)
+
+    settings = load_settings()
+    settings = add_hook(settings)
+    save_settings(settings)
+
+    install_models_json()
+
+    print(f"✓ Installed to {dest}")
+    print(f"✓ Hook added to settings.json")
+
+def uninstall():
+    dest = Path.home() / ".claude" / "skills" / SKILL_NAME
+
+    settings = load_settings()
+    settings = remove_hook(settings)
+    save_settings(settings)
+    print(f"✓ Hook removed from settings.json")
+
+    if dest.exists():
+        shutil.rmtree(dest)
+        print(f"✓ Removed {dest}")
+    else:
+        print(f"⚠ {dest} not found")
+
+def main():
+    parser = argparse.ArgumentParser(description="Install/uninstall do skill")
+    parser.add_argument("--uninstall", "-u", action="store_true", help="Uninstall the skill")
+    args = parser.parse_args()
+
+    if args.uninstall:
+        uninstall()
+    else:
+        install()
+
+if __name__ == "__main__":
+    main()

skills/do/scripts/get-context.py

@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+"""
+Get context for current task.
+
+Reads the current task's jsonl files and returns context for specified agent.
+Used by inject-context hook to build agent prompts.
+"""
+
+import json
+import os
+import sys
+from pathlib import Path
+
+DIR_TASKS = ".claude/do-tasks"
+FILE_CURRENT_TASK = ".current-task"
+FILE_TASK_JSON = "task.json"
+
+
+def get_project_root() -> str:
+    return os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+
+def get_current_task(project_root: str) -> str | None:
+    current_task_file = os.path.join(project_root, DIR_TASKS, FILE_CURRENT_TASK)
+    if not os.path.exists(current_task_file):
+        return None
+    try:
+        with open(current_task_file, "r", encoding="utf-8") as f:
+            content = f.read().strip()
+            return content if content else None
+    except Exception:
+        return None
+
+
+def read_file_content(base_path: str, file_path: str) -> str | None:
+    full_path = os.path.join(base_path, file_path)
+    if os.path.exists(full_path) and os.path.isfile(full_path):
+        try:
+            with open(full_path, "r", encoding="utf-8") as f:
+                return f.read()
+        except Exception:
+            return None
+    return None
+
+
+def read_jsonl_entries(base_path: str, jsonl_path: str) -> list[tuple[str, str]]:
+    full_path = os.path.join(base_path, jsonl_path)
+    if not os.path.exists(full_path):
+        return []
+
+    results = []
+    try:
+        with open(full_path, "r", encoding="utf-8") as f:
+            for line in f:
+                line = line.strip()
+                if not line:
+                    continue
+                try:
+                    item = json.loads(line)
+                    file_path = item.get("file") or item.get("path")
+                    if not file_path:
+                        continue
+                    content = read_file_content(base_path, file_path)
+                    if content:
+                        results.append((file_path, content))
+                except json.JSONDecodeError:
+                    continue
+    except Exception:
+        pass
+    return results
+
+
+def get_agent_context(project_root: str, task_dir: str, agent_type: str) -> str:
+    """Get complete context for specified agent."""
+    context_parts = []
+
+    # Read agent-specific jsonl
+    agent_jsonl = os.path.join(task_dir, f"{agent_type}.jsonl")
+    agent_entries = read_jsonl_entries(project_root, agent_jsonl)
+
+    for file_path, content in agent_entries:
+        context_parts.append(f"=== {file_path} ===\n{content}")
+
+    # Read prd.md
+    prd_content = read_file_content(project_root, os.path.join(task_dir, "prd.md"))
+    if prd_content:
+        context_parts.append(f"=== {task_dir}/prd.md (Requirements) ===\n{prd_content}")
+
+    return "\n\n".join(context_parts)
+
+
+def get_task_info(project_root: str, task_dir: str) -> dict | None:
+    """Get task.json data."""
+    task_json_path = os.path.join(project_root, task_dir, FILE_TASK_JSON)
+    if not os.path.exists(task_json_path):
+        return None
+    try:
+        with open(task_json_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    except Exception:
+        return None
+
+
+def main():
+    import argparse
+
+    parser = argparse.ArgumentParser(description="Get context for current task")
+    parser.add_argument("agent", nargs="?", choices=["implement", "check", "debug"],
+                        help="Agent type (optional, returns task info if not specified)")
+    parser.add_argument("--json", action="store_true", help="Output as JSON")
+    args = parser.parse_args()
+
+    project_root = get_project_root()
+    task_dir = get_current_task(project_root)
+
+    if not task_dir:
+        if args.json:
+            print(json.dumps({"error": "No active task"}))
+        else:
+            print("No active task.", file=sys.stderr)
+        sys.exit(1)
+
+    task_info = get_task_info(project_root, task_dir)
+
+    if not args.agent:
+        if args.json:
+            print(json.dumps({"task_dir": task_dir, "task_info": task_info}))
+        else:
+            print(f"Task: {task_dir}")
+            if task_info:
+                print(f"Title: {task_info.get('title', 'N/A')}")
+                print(f"Phase: {task_info.get('current_phase', '?')}/{task_info.get('max_phases', 5)}")
+        sys.exit(0)
+
+    context = get_agent_context(project_root, task_dir, args.agent)
+
+    if args.json:
+        print(json.dumps({
+            "task_dir": task_dir,
+            "agent": args.agent,
+            "context": context,
+            "task_info": task_info,
+        }))
+    else:
+        print(context)
+
+
+if __name__ == "__main__":
+    main()

skills/do/scripts/setup-do.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+"""
+Initialize do skill workflow - wrapper around task.py.
+
+Creates a task directory under .claude/do-tasks/ with:
+- task.md: Task metadata (YAML frontmatter) + requirements (Markdown body)
+
+If --worktree is specified, also creates a git worktree for isolated development.
+"""
+
+import argparse
+import sys
+
+from task import create_task, PHASE_NAMES
+
+
+def die(msg: str):
+    print(f"Error: {msg}", file=sys.stderr)
+    sys.exit(1)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Initialize do skill workflow with task directory"
+    )
+    parser.add_argument("--max-phases", type=int, default=5, help="Default: 5")
+    parser.add_argument(
+        "--completion-promise",
+        default="<promise>DO_COMPLETE</promise>",
+        help="Default: <promise>DO_COMPLETE</promise>",
+    )
+    parser.add_argument("--worktree", action="store_true", help="Enable worktree mode")
+    parser.add_argument("prompt", nargs="+", help="Task description")
+    args = parser.parse_args()
+
+    if args.max_phases < 1:
+        die("--max-phases must be a positive integer")
+
+    prompt = " ".join(args.prompt)
+    result = create_task(title=prompt, use_worktree=args.worktree)
+
+    task_data = result["task_data"]
+    worktree_dir = result.get("worktree_dir", "")
+
+    print(f"Initialized: {result['relative_path']}")
+    print(f"task_id: {task_data['id']}")
+    print(f"phase: 1/{task_data['max_phases']} ({PHASE_NAMES[1]})")
+    print(f"completion_promise: {task_data['completion_promise']}")
+    print(f"use_worktree: {task_data['use_worktree']}")
+    print(f"export DO_TASK_DIR={result['relative_path']}")
+
+    if worktree_dir:
+        print(f"worktree_dir: {worktree_dir}")
+        print(f"export DO_WORKTREE_DIR={worktree_dir}")
+
+
+if __name__ == "__main__":
+    main()

skills/do/scripts/setup-do.sh

@@ -1,115 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-usage() {
-	cat <<'EOF'
-Usage: setup-do.sh [options] PROMPT...
-
-Creates (or overwrites) project state file:
-  .claude/do.local.md
-
-Options:
-  --max-phases N            Default: 7
-  --completion-promise STR  Default: <promise>DO_COMPLETE</promise>
-  -h, --help                Show this help
-EOF
-}
-
-die() {
-	echo "❌ $*" >&2
-	exit 1
-}
-
-phase_name_for() {
-	case "${1:-}" in
-	1) echo "Discovery" ;;
-	2) echo "Exploration" ;;
-	3) echo "Clarification" ;;
-	4) echo "Architecture" ;;
-	5) echo "Implementation" ;;
-	6) echo "Review" ;;
-	7) echo "Summary" ;;
-	*) echo "Phase ${1:-unknown}" ;;
-	esac
-}
-
-max_phases=7
-completion_promise="<promise>DO_COMPLETE</promise>"
-declare -a prompt_parts=()
-
-while [ $# -gt 0 ]; do
-	case "$1" in
-	-h|--help)
-		usage
-		exit 0
-		;;
-	--max-phases)
-		[ $# -ge 2 ] || die "--max-phases requires a value"
-		max_phases="$2"
-		shift 2
-		;;
-	--completion-promise)
-		[ $# -ge 2 ] || die "--completion-promise requires a value"
-		completion_promise="$2"
-		shift 2
-		;;
-	--)
-		shift
-		while [ $# -gt 0 ]; do
-			prompt_parts+=("$1")
-			shift
-		done
-		break
-		;;
-	-*)
-		die "Unknown argument: $1 (use --help)"
-		;;
-	*)
-		prompt_parts+=("$1")
-		shift
-		;;
-	esac
-done
-
-prompt="${prompt_parts[*]:-}"
-[ -n "$prompt" ] || die "PROMPT is required (use --help)"
-
-if ! [[ "$max_phases" =~ ^[0-9]+$ ]] || [ "$max_phases" -lt 1 ]; then
-	die "--max-phases must be a positive integer"
-fi
-
-project_dir="${CLAUDE_PROJECT_DIR:-$PWD}"
-state_dir="${project_dir}/.claude"
-
-task_id="$(date +%s)-$$-$(head -c 4 /dev/urandom | od -An -tx1 | tr -d ' \n')"
-state_file="${state_dir}/do.${task_id}.local.md"
-
-mkdir -p "$state_dir"
-
-phase_name="$(phase_name_for 1)"
-
-cat > "$state_file" << EOF
----
-active: true
-current_phase: 1
-phase_name: "$phase_name"
-max_phases: $max_phases
-completion_promise: "$completion_promise"
----
-
-# do loop state
-
-## Prompt
-$prompt
-
-## Notes
-- Update frontmatter current_phase/phase_name as you progress
-- When complete, include the frontmatter completion_promise in your final output
-EOF
-
-echo "Initialized: $state_file"
-echo "task_id: $task_id"
-echo "phase: 1/$max_phases ($phase_name)"
-echo "completion_promise: $completion_promise"
-echo "export DO_TASK_ID=$task_id"

skills/do/scripts/task.py

@@ -0,0 +1,434 @@
+#!/usr/bin/env python3
+"""
+Task Directory Management CLI for do skill workflow.
+
+Commands:
+  create <title>              - Create a new task directory with task.md
+  start <task-dir>            - Set current task pointer
+  finish                      - Clear current task pointer
+  list                        - List active tasks
+  status                      - Show current task status
+  update-phase <N>            - Update current phase
+"""
+
+import argparse
+import os
+import random
+import re
+import string
+import subprocess
+import sys
+from datetime import datetime
+from pathlib import Path
+
+# Directory constants
+DIR_TASKS = ".claude/do-tasks"
+FILE_CURRENT_TASK = ".current-task"
+FILE_TASK_MD = "task.md"
+
+PHASE_NAMES = {
+    1: "Understand",
+    2: "Clarify",
+    3: "Design",
+    4: "Implement",
+    5: "Complete",
+}
+
+
+def get_project_root() -> str:
+    """Get project root from env or cwd."""
+    return os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd())
+
+
+def get_tasks_dir(project_root: str) -> str:
+    """Get tasks directory path."""
+    return os.path.join(project_root, DIR_TASKS)
+
+
+def get_current_task_file(project_root: str) -> str:
+    """Get current task pointer file path."""
+    return os.path.join(project_root, DIR_TASKS, FILE_CURRENT_TASK)
+
+
+def generate_task_id() -> str:
+    """Generate short task ID: MMDD-XXXX format."""
+    date_part = datetime.now().strftime("%m%d")
+    random_part = ''.join(random.choices(string.ascii_lowercase + string.digits, k=4))
+    return f"{date_part}-{random_part}"
+
+
+def read_task_md(task_md_path: str) -> dict | None:
+    """Read task.md and parse YAML frontmatter + body."""
+    if not os.path.exists(task_md_path):
+        return None
+
+    try:
+        with open(task_md_path, "r", encoding="utf-8") as f:
+            content = f.read()
+    except Exception:
+        return None
+
+    # Parse YAML frontmatter
+    match = re.match(r'^---\n(.*?)\n---\n(.*)$', content, re.DOTALL)
+    if not match:
+        return None
+
+    frontmatter_str = match.group(1)
+    body = match.group(2)
+
+    # Simple YAML parsing (no external deps)
+    frontmatter = {}
+    for line in frontmatter_str.split('\n'):
+        if ':' in line:
+            key, value = line.split(':', 1)
+            key = key.strip()
+            value = value.strip()
+            # Handle quoted strings
+            if value.startswith('"') and value.endswith('"'):
+                value = value[1:-1]
+            elif value == 'true':
+                value = True
+            elif value == 'false':
+                value = False
+            elif value.isdigit():
+                value = int(value)
+            frontmatter[key] = value
+
+    return {"frontmatter": frontmatter, "body": body}
+
+
+def write_task_md(task_md_path: str, frontmatter: dict, body: str) -> bool:
+    """Write task.md with YAML frontmatter + body."""
+    try:
+        lines = ["---"]
+        for key, value in frontmatter.items():
+            if isinstance(value, bool):
+                lines.append(f"{key}: {str(value).lower()}")
+            elif isinstance(value, int):
+                lines.append(f"{key}: {value}")
+            elif isinstance(value, str) and ('<' in value or '>' in value or ':' in value):
+                lines.append(f'{key}: "{value}"')
+            else:
+                lines.append(f'{key}: "{value}"' if isinstance(value, str) else f"{key}: {value}")
+        lines.append("---")
+        lines.append("")
+        lines.append(body)
+
+        with open(task_md_path, "w", encoding="utf-8") as f:
+            f.write('\n'.join(lines))
+        return True
+    except Exception:
+        return False
+
+
+def create_worktree(project_root: str, task_id: str) -> str:
+    """Create a git worktree for the task. Returns the worktree directory path."""
+    # Get git root
+    result = subprocess.run(
+        ["git", "-C", project_root, "rev-parse", "--show-toplevel"],
+        capture_output=True,
+        text=True,
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"Not a git repository: {project_root}")
+    git_root = result.stdout.strip()
+
+    # Calculate paths
+    worktree_dir = os.path.join(git_root, ".worktrees", f"do-{task_id}")
+    branch_name = f"do/{task_id}"
+
+    # Create worktree with new branch
+    result = subprocess.run(
+        ["git", "-C", git_root, "worktree", "add", "-b", branch_name, worktree_dir],
+        capture_output=True,
+        text=True,
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"Failed to create worktree: {result.stderr}")
+
+    return worktree_dir
+
+
+def create_task(title: str, use_worktree: bool = False) -> dict:
+    """Create a new task directory with task.md."""
+    project_root = get_project_root()
+    tasks_dir = get_tasks_dir(project_root)
+    os.makedirs(tasks_dir, exist_ok=True)
+
+    task_id = generate_task_id()
+    task_dir = os.path.join(tasks_dir, task_id)
+
+    os.makedirs(task_dir, exist_ok=True)
+
+    # Create worktree if requested
+    worktree_dir = ""
+    if use_worktree:
+        try:
+            worktree_dir = create_worktree(project_root, task_id)
+        except RuntimeError as e:
+            print(f"Warning: {e}", file=sys.stderr)
+            use_worktree = False
+
+    frontmatter = {
+        "id": task_id,
+        "title": title,
+        "status": "in_progress",
+        "current_phase": 1,
+        "phase_name": PHASE_NAMES[1],
+        "max_phases": 5,
+        "use_worktree": use_worktree,
+        "worktree_dir": worktree_dir,
+        "created_at": datetime.now().isoformat(),
+        "completion_promise": "<promise>DO_COMPLETE</promise>",
+    }
+
+    body = f"""# Requirements
+
+{title}
+
+## Context
+
+## Progress
+"""
+
+    task_md_path = os.path.join(task_dir, FILE_TASK_MD)
+    write_task_md(task_md_path, frontmatter, body)
+
+    current_task_file = get_current_task_file(project_root)
+    relative_task_dir = os.path.relpath(task_dir, project_root)
+    with open(current_task_file, "w", encoding="utf-8") as f:
+        f.write(relative_task_dir)
+
+    return {
+        "task_dir": task_dir,
+        "relative_path": relative_task_dir,
+        "task_data": frontmatter,
+        "worktree_dir": worktree_dir,
+    }
+
+
+def get_current_task(project_root: str) -> str | None:
+    """Read current task directory path."""
+    current_task_file = get_current_task_file(project_root)
+    if not os.path.exists(current_task_file):
+        return None
+
+    try:
+        with open(current_task_file, "r", encoding="utf-8") as f:
+            content = f.read().strip()
+            return content if content else None
+    except Exception:
+        return None
+
+
+def start_task(task_dir: str) -> bool:
+    """Set current task pointer."""
+    project_root = get_project_root()
+    tasks_dir = get_tasks_dir(project_root)
+
+    if os.path.isabs(task_dir):
+        full_path = task_dir
+        relative_path = os.path.relpath(task_dir, project_root)
+    else:
+        if not task_dir.startswith(DIR_TASKS):
+            full_path = os.path.join(tasks_dir, task_dir)
+            relative_path = os.path.join(DIR_TASKS, task_dir)
+        else:
+            full_path = os.path.join(project_root, task_dir)
+            relative_path = task_dir
+
+    if not os.path.exists(full_path):
+        print(f"Error: Task directory not found: {full_path}", file=sys.stderr)
+        return False
+
+    current_task_file = get_current_task_file(project_root)
+    os.makedirs(os.path.dirname(current_task_file), exist_ok=True)
+
+    with open(current_task_file, "w", encoding="utf-8") as f:
+        f.write(relative_path)
+
+    return True
+
+
+def finish_task() -> bool:
+    """Clear current task pointer."""
+    project_root = get_project_root()
+    current_task_file = get_current_task_file(project_root)
+
+    if os.path.exists(current_task_file):
+        os.remove(current_task_file)
+
+    return True
+
+
+def list_tasks() -> list[dict]:
+    """List all task directories."""
+    project_root = get_project_root()
+    tasks_dir = get_tasks_dir(project_root)
+
+    if not os.path.exists(tasks_dir):
+        return []
+
+    tasks = []
+    current_task = get_current_task(project_root)
+
+    for entry in sorted(os.listdir(tasks_dir), reverse=True):
+        entry_path = os.path.join(tasks_dir, entry)
+        if not os.path.isdir(entry_path):
+            continue
+
+        task_md_path = os.path.join(entry_path, FILE_TASK_MD)
+        if not os.path.exists(task_md_path):
+            continue
+
+        parsed = read_task_md(task_md_path)
+        if parsed:
+            task_data = parsed["frontmatter"]
+        else:
+            task_data = {"id": entry, "title": entry, "status": "unknown"}
+
+        relative_path = os.path.join(DIR_TASKS, entry)
+        task_data["path"] = relative_path
+        task_data["is_current"] = current_task == relative_path
+        tasks.append(task_data)
+
+    return tasks
+
+
+def get_status() -> dict | None:
+    """Get current task status."""
+    project_root = get_project_root()
+    current_task = get_current_task(project_root)
+
+    if not current_task:
+        return None
+
+    task_dir = os.path.join(project_root, current_task)
+    task_md_path = os.path.join(task_dir, FILE_TASK_MD)
+
+    parsed = read_task_md(task_md_path)
+    if not parsed:
+        return None
+
+    task_data = parsed["frontmatter"]
+    task_data["path"] = current_task
+    return task_data
+
+
+def update_phase(phase: int) -> bool:
+    """Update current task phase."""
+    project_root = get_project_root()
+    current_task = get_current_task(project_root)
+
+    if not current_task:
+        print("Error: No active task.", file=sys.stderr)
+        return False
+
+    task_dir = os.path.join(project_root, current_task)
+    task_md_path = os.path.join(task_dir, FILE_TASK_MD)
+
+    parsed = read_task_md(task_md_path)
+    if not parsed:
+        print("Error: task.md not found or invalid.", file=sys.stderr)
+        return False
+
+    frontmatter = parsed["frontmatter"]
+    frontmatter["current_phase"] = phase
+    frontmatter["phase_name"] = PHASE_NAMES.get(phase, f"Phase {phase}")
+
+    if not write_task_md(task_md_path, frontmatter, parsed["body"]):
+        print("Error: Failed to write task.md.", file=sys.stderr)
+        return False
+
+    return True
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Task directory management for do skill workflow"
+    )
+    subparsers = parser.add_subparsers(dest="command", help="Available commands")
+
+    # create command
+    create_parser = subparsers.add_parser("create", help="Create a new task")
+    create_parser.add_argument("title", nargs="+", help="Task title")
+    create_parser.add_argument("--worktree", action="store_true", help="Enable worktree mode")
+
+    # start command
+    start_parser = subparsers.add_parser("start", help="Set current task")
+    start_parser.add_argument("task_dir", help="Task directory path")
+
+    # finish command
+    subparsers.add_parser("finish", help="Clear current task")
+
+    # list command
+    subparsers.add_parser("list", help="List all tasks")
+
+    # status command
+    subparsers.add_parser("status", help="Show current task status")
+
+    # update-phase command
+    phase_parser = subparsers.add_parser("update-phase", help="Update current phase")
+    phase_parser.add_argument("phase", type=int, help="Phase number (1-5)")
+
+    args = parser.parse_args()
+
+    if args.command == "create":
+        title = " ".join(args.title)
+        result = create_task(title, args.worktree)
+        print(f"Created task: {result['relative_path']}")
+        print(f"Task ID: {result['task_data']['id']}")
+        print(f"Phase: 1/{result['task_data']['max_phases']} (Understand)")
+        print(f"Worktree: {result['task_data']['use_worktree']}")
+
+    elif args.command == "start":
+        if start_task(args.task_dir):
+            print(f"Started task: {args.task_dir}")
+        else:
+            sys.exit(1)
+
+    elif args.command == "finish":
+        if finish_task():
+            print("Task finished, current task cleared.")
+        else:
+            sys.exit(1)
+
+    elif args.command == "list":
+        tasks = list_tasks()
+        if not tasks:
+            print("No tasks found.")
+        else:
+            for task in tasks:
+                marker = "* " if task.get("is_current") else "  "
+                phase = task.get("current_phase", "?")
+                max_phase = task.get("max_phases", 5)
+                status = task.get("status", "unknown")
+                print(f"{marker}{task['id']} [{status}] phase {phase}/{max_phase}")
+                print(f"    {task.get('title', 'No title')}")
+
+    elif args.command == "status":
+        status = get_status()
+        if not status:
+            print("No active task.")
+        else:
+            print(f"Task: {status['id']}")
+            print(f"Title: {status.get('title', 'No title')}")
+            print(f"Status: {status.get('status', 'unknown')}")
+            print(f"Phase: {status.get('current_phase', '?')}/{status.get('max_phases', 5)}")
+            print(f"Worktree: {status.get('use_worktree', False)}")
+            print(f"Path: {status['path']}")
+
+    elif args.command == "update-phase":
+        if update_phase(args.phase):
+            phase_name = PHASE_NAMES.get(args.phase, f"Phase {args.phase}")
+            print(f"Updated to phase {args.phase} ({phase_name})")
+        else:
+            sys.exit(1)
+
+    else:
+        parser.print_help()
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()