add .dirmd and other metadata

.gitignore

@@ -1,3 +1,4 @@
 bin/
 .env
 vendor/
+.dirmd

README.md

@@ -2,6 +2,8 @@
 
 Generate markdown documentation from directory structure. Optimized for LLM ingestion.
 
+<video src="./docs/videos/dirmd.webm" autoplay loop muted playsinline></video>
+
 ## Features
 
 - Recursive directory traversal
@@ -136,10 +138,32 @@ Example output with `dirmd -o docs.md ~/repos/myproject --vertical-slices`:
     ├── cmd.md           ← slice: tree + contents of cmd/
     └── internal.md      ← slice: tree + contents of internal/
 
+## Instructions File (`.dirmd`)
+
+If a file named `.dirmd` exists in the root of the input directory, you can include its contents as metadata in the generated output by passing the `--instructions` flag.
+
+This is useful for injecting specific context, constraints, or instructions for LLMs processing the snapshot.
+
+- **File Name**: `.dirmd`
+- **Location**: Root of the input directory.
+- **Format**: Plain text or Markdown.
+- **Output**: Rendered as a quoted block (`> Instructions: ...`) immediately after the timestamp and commit info.
+- **Opt-in**: The file is **ignored** unless `--instructions` is explicitly passed.
+
+Example `.dirmd`:
+
+```text
+Focus on the `internal/` package for business logic.
+Ignore `cmd/` unless explicitly asked.
+Prioritize Go files over Python.
+```
+
 ## LLM-Optimized Output
 
 Output is designed for RAG ingestion and LLM context windows, not human presentation:
 
+- **ISO 8601 Timestamp**: Added as a metadata line (`> Generated: ...`) immediately after the H1 header for every new file created.
+- **Git Commit Info**: If the source directory is a Git repository, a second metadata line (`> Commit: <sha> (<message>)`) is added below the timestamp.
 - **ASCII tree format** (`+-` instead of Unicode box-drawing) to reduce token overhead
 - **Explicit file delimiters**: `--- FILE: ./path (bytes, lines) ---` and `--- END FILE ---`
 - **Document type markers**: `[ROOT]` and `[SLICE]` in H1 headers
@@ -216,15 +240,18 @@ For full documentation on the Proton Drive CLI, including installation, authenti
 Produces markdown with:
 
 1. Absolute path as H1 header with `[ROOT]` or `[SLICE]` marker
-2. ASCII directory tree (indented with `+-` and `|` characters)
-3. Vertical slices index table (sliced mode only)
-4. All text files with content in fenced code blocks
-5. Explicit `--- FILE: ---` and `--- END FILE ---` delimiters with byte and line counts
-6. Language detection from file extensions
+2. **Timestamp metadata line** (ISO 8601) immediately after the H1 header (only for new files)
+3. ASCII directory tree (indented with `+-` and `|` characters)
+4. Vertical slices index table (sliced mode only)
+5. All text files with content in fenced code blocks
+6. Explicit `--- FILE: ---` and `--- END FILE ---` delimiters with byte and line counts
+7. Language detection from file extensions
 
 Example output structure (non-sliced mode):
 
     # /home/user/repos/myproject [ROOT]
+    > Generated: 2026-09-02T14:30:00Z
+    > Commit: a1b2c3d (Fix login bug)
 
     ## Directory Tree
 

cmd/root.go

@@ -27,33 +27,24 @@ Output is always written to a directory specified by -o.
 
 Examples:
 
-  # Create new documentation (writes index.md inside ./docs/)
+  # Create new documentation
   dirmd -o ./docs ~/repos/myproject
 
-  # Overwrite existing output directory
+  # Overwrite existing output directory (deletes all contents)
   dirmd -o ./docs ~/repos/myproject -f
 
   # Append a single file
   dirmd -a -i README.md -o ./docs
 
-  # Vertical slices (root index.md + one markdown per top-level dir)
+  # Vertical slices
   dirmd -o ./docs ~/repos/myproject --vertical-slices
 
-  # Skip frontend files
-  dirmd -o ./docs ~/repos/myproject --skip-frontend
-
-  # Frontend only
-  dirmd -o ./docs ~/repos/myproject --frontend-only
-
-  # Omit test files and test blocks
-  dirmd -o ./docs ~/repos/myproject --omit-test
+  # Include instructions from .dirmd
+  dirmd -o ./docs ~/repos/myproject --instructions
 
   # Generate and upload to Proton Drive
   dirmd -o ./docs ~/repos/myproject --proton-drive
 
-  # Generate and upload to a specific remote path
-  dirmd -o ./docs ~/repos/myproject --proton-drive --drive-path /my-files/docs/api
-
   # Interactive TUI mode
   dirmd --tui`,
 		RunE: run,
@@ -75,6 +66,7 @@ Examples:
 	omitTest       bool
 	omitMd         bool
 	tuiMode        bool
+	instructions   bool
 )
 
 func Execute() {
@@ -86,7 +78,7 @@ func Execute() {
 func init() {
 	rootCmd.PersistentFlags().StringVarP(&outputPath, "output", "o", "", "output directory (required)")
 	rootCmd.Flags().BoolVarP(&appendMode, "append", "a", false, "append to existing index.md")
-	rootCmd.Flags().BoolVarP(&force, "force", "f", false, "overwrite existing output directory")
+	rootCmd.Flags().BoolVarP(&force, "force", "f", false, "overwrite existing output directory (deletes all contents)")
 	rootCmd.Flags().StringVar(&singleFile, "input-file", "", "single file input (append mode only)")
 	rootCmd.Flags().BoolVarP(&tuiMode, "interactive", "i", false, "launch interactive TUI configuration wizard")
 	rootCmd.Flags().Int64Var(&maxSize, "max-size", config.DefaultMaxSize, "max file size in bytes")
@@ -100,6 +92,7 @@ func init() {
 	rootCmd.Flags().BoolVar(&frontendOnly, "frontend-only", false, "include only frontend file types and README.md")
 	rootCmd.Flags().BoolVar(&omitTest, "omit-test", false, "exclude test files (Go *_test.go, Java *Test.java) and strip #[cfg(test)] blocks from Rust")
 	rootCmd.Flags().BoolVar(&omitMd, "omit-md", false, "omit all .md files except README.md")
+	rootCmd.Flags().BoolVar(&instructions, "instructions", false, "include .dirmd instructions file if present in root")
 }
 
 func run(cmd *cobra.Command, args []string) error {
@@ -133,20 +126,21 @@ func run(cmd *cobra.Command, args []string) error {
 	}
 
 	cfg := &config.Config{
-		OutputPath:     outputPath,
-		AppendMode:     appendMode,
-		Force:          force,
-		MaxSize:        maxSize,
-		MaxDepth:       maxDepth,
-		Ignores:        append(config.DefaultIgnores, ignorePatterns...),
-		Extensions:     excludedExts,
-		ProtonDrive:    protonDrive,
-		DrivePath:      drivePath,
-		VerticalSlices: verticalSlices,
-		SkipFrontend:   skipFrontend,
-		FrontendOnly:   frontendOnly,
-		OmitTest:       omitTest,
-		OmitMd:         omitMd,
+		OutputPath:          outputPath,
+		AppendMode:          appendMode,
+		Force:               force,
+		MaxSize:             maxSize,
+		MaxDepth:            maxDepth,
+		Ignores:             append(config.DefaultIgnores, ignorePatterns...),
+		Extensions:          excludedExts,
+		ProtonDrive:         protonDrive,
+		DrivePath:           drivePath,
+		VerticalSlices:      verticalSlices,
+		SkipFrontend:        skipFrontend,
+		FrontendOnly:        frontendOnly,
+		OmitTest:            omitTest,
+		OmitMd:              omitMd,
+		IncludeInstructions: instructions,
 	}
 
 	if singleFile != "" {
@@ -174,8 +168,13 @@ func run(cmd *cobra.Command, args []string) error {
 	}
 
 	if !appendMode {
-		if _, err := os.Stat(absOutput); err == nil && !force {
-			return fmt.Errorf("output directory %s already exists (use -f to overwrite)", absOutput)
+		if _, err := os.Stat(absOutput); err == nil {
+			if !force {
+				return fmt.Errorf("output directory %s already exists (use -f to overwrite)", absOutput)
+			}
+			if err := os.RemoveAll(absOutput); err != nil {
+				return fmt.Errorf("failed to remove existing output directory: %w", err)
+			}
 		}
 	}
 
@@ -202,7 +201,6 @@ func run(cmd *cobra.Command, args []string) error {
 		if err != nil {
 			return err
 		}
-
 		fmt.Fprintf(os.Stderr, "generated %d files in %s\n", len(generated), absOutput)
 
 		if protonDrive {
@@ -210,27 +208,22 @@ func run(cmd *cobra.Command, args []string) error {
 			if remoteDir == "" {
 				remoteDir = "/my-files/md/" + filepath.Base(absOutput)
 			}
-
 			if err := drive.CheckAuth(); err != nil {
 				fmt.Fprintf(os.Stderr, "error: %v\n", err)
 				fmt.Fprintln(os.Stderr, "local files were written successfully, but upload was skipped")
 				return err
 			}
-
 			if err := drive.UploadDir(absOutput, remoteDir); err != nil {
 				fmt.Fprintf(os.Stderr, "error: %v\n", err)
 				fmt.Fprintln(os.Stderr, "local files were written successfully, but upload failed")
 				return err
 			}
-
 			fmt.Fprintf(os.Stderr, "uploaded %s to %s on Proton Drive\n", absOutput, remoteDir)
 		}
-
 		return nil
 	}
 
 	indexPath := filepath.Join(absOutput, indexBasename)
-
 	if err := renderer.Write(result, indexPath, appendMode, cfg.SingleFile); err != nil {
 		return err
 	}
@@ -242,19 +235,16 @@ func run(cmd *cobra.Command, args []string) error {
 		if remoteDir == "" {
 			remoteDir = "/my-files/md/" + filepath.Base(absOutput)
 		}
-
 		if err := drive.CheckAuth(); err != nil {
 			fmt.Fprintf(os.Stderr, "error: %v\n", err)
 			fmt.Fprintln(os.Stderr, "local file was written successfully, but upload was skipped")
 			return err
 		}
-
 		if err := drive.UploadDir(absOutput, remoteDir); err != nil {
 			fmt.Fprintf(os.Stderr, "error: %v\n", err)
 			fmt.Fprintln(os.Stderr, "local file was written successfully, but upload failed")
 			return err
 		}
-
 		fmt.Fprintf(os.Stderr, "uploaded %s to %s on Proton Drive\n", absOutput, remoteDir)
 	}
 

internal/config/config.go

@@ -15,19 +15,9 @@ const (
 )
 
 var DefaultIgnores = []string{
-	".git",
-	"node_modules",
-	"vendor",
-	"bin",
-	"go.mod",
-	"go.sum",
-	"target",
-	"build",
-	"dist",
-	"Cargo.lock",
-	".idea",
-	".vscode",
-	"dependency-reduced-pom.xml",
+	".git", "node_modules", "vendor", "bin", "go.mod", "go.sum",
+	"target", "build", "dist", "Cargo.lock", ".idea", ".vscode",
+	"dependency-reduced-pom.xml", "__pycache__", "venv", "env",
 }
 
 var DefaultExts = []string{
@@ -39,10 +29,8 @@ var DefaultExts = []string{
 	".pdf", ".doc", ".docx", ".xls", ".xlsx",
 	".pem", ".key", ".cert",
 	".db", ".sqlite", ".sqlite3",
-	".class",
-	".jar",
-	".war",
-	".ear",
+	".class", ".jar", ".war", ".ear",
+	".pyc", ".pyo",
 }
 
 var FrontendExts = []string{
@@ -55,33 +43,28 @@ var FrontendExts = []string{
 
 type stringSlice []string
 
-func (s *stringSlice) String() string {
-	return strings.Join(*s, ", ")
-}
-
-func (s *stringSlice) Set(v string) error {
-	*s = append(*s, v)
-	return nil
-}
+func (s *stringSlice) String() string     { return strings.Join(*s, ", ") }
+func (s *stringSlice) Set(v string) error { *s = append(*s, v); return nil }
 
 type Config struct {
-	InputPath      string
-	OutputPath     string
-	AppendMode     bool
-	Force          bool
-	SingleFile     bool
-	MaxSize        int64
-	MaxDepth       int
-	Ignores        []string
-	Extensions     []string
-	AbsRoot        string
-	ProtonDrive    bool
-	DrivePath      string
-	VerticalSlices bool
-	SkipFrontend   bool
-	FrontendOnly   bool
-	OmitTest       bool
-	OmitMd         bool
+	InputPath           string
+	OutputPath          string
+	AppendMode          bool
+	Force               bool
+	SingleFile          bool
+	MaxSize             int64
+	MaxDepth            int
+	Ignores             []string
+	Extensions          []string
+	AbsRoot             string
+	ProtonDrive         bool
+	DrivePath           string
+	VerticalSlices      bool
+	SkipFrontend        bool
+	FrontendOnly        bool
+	OmitTest            bool
+	OmitMd              bool
+	IncludeInstructions bool
 }
 
 func PrintUsage() {
@@ -94,22 +77,23 @@ func PrintUsage() {
 
 func Parse() (*Config, error) {
 	var (
-		input          string
-		output         string
-		appendMd       bool
-		force          bool
-		maxSize        int64
-		maxDepth       int
-		ignores        stringSlice
-		exts           stringSlice
-		showVer        bool
-		protonDrive    bool
-		drivePath      string
-		verticalSlices bool
-		skipFrontend   bool
-		frontendOnly   bool
-		omitTest       bool
-		omitMd         bool
+		input               string
+		output              string
+		appendMd            bool
+		force               bool
+		maxSize             int64
+		maxDepth            int
+		ignores             stringSlice
+		exts                stringSlice
+		showVer             bool
+		protonDrive         bool
+		drivePath           string
+		verticalSlices      bool
+		skipFrontend        bool
+		frontendOnly        bool
+		omitTest            bool
+		omitMd              bool
+		includeInstructions bool
 	)
 
 	flag.StringVar(&input, "i", "", "single file input (append mode only)")
@@ -124,10 +108,11 @@ func Parse() (*Config, error) {
 	flag.BoolVar(&protonDrive, "proton-drive", false, "upload output to Proton Drive after writing locally")
 	flag.StringVar(&drivePath, "drive-path", "", "full remote path on Proton Drive (requires --proton-drive")
 	flag.BoolVar(&verticalSlices, "vertical-slices", false, "split output into root file + one markdown per top-level directory")
-	flag.BoolVar(&skipFrontend, "skip-frontend", false, "omit frontend file types (.html, .css, .js, .ts, .vue, .svelte, etc.)")
+	flag.BoolVar(&skipFrontend, "skip-frontend", false, "omit frontend file types")
 	flag.BoolVar(&frontendOnly, "frontend-only", false, "include only frontend file types and README.md")
-	flag.BoolVar(&omitTest, "omit-test", false, "exclude test files (Go *_test.go, Java *Test.java) and strip #[cfg(test)] blocks from Rust")
+	flag.BoolVar(&omitTest, "omit-test", false, "exclude test files and strip #[cfg(test)] blocks")
 	flag.BoolVar(&omitMd, "omit-md", false, "omit all .md files except README.md")
+	flag.BoolVar(&includeInstructions, "instructions", false, "include .dirmd instructions file if present in root")
 
 	flag.Usage = PrintUsage
 	flag.Parse()
@@ -140,19 +125,15 @@ func Parse() (*Config, error) {
 	if output == "" {
 		return nil, fmt.Errorf("-o is required")
 	}
-
 	if drivePath != "" && !protonDrive {
 		return nil, fmt.Errorf("--drive-path requires --proton-drive")
 	}
-
 	if verticalSlices && appendMd {
 		return nil, fmt.Errorf("--vertical-slices cannot be used with --append")
 	}
-
 	if verticalSlices && input != "" {
 		return nil, fmt.Errorf("--vertical-slices cannot be used with --input-file")
 	}
-
 	if skipFrontend && frontendOnly {
 		return nil, fmt.Errorf("--skip-frontend and --frontend-only are mutually exclusive")
 	}
@@ -163,20 +144,21 @@ func Parse() (*Config, error) {
 	}
 
 	cfg := &Config{
-		OutputPath:     output,
-		AppendMode:     appendMd,
-		Force:          force,
-		MaxSize:        maxSize,
-		MaxDepth:       maxDepth,
-		Ignores:        append(DefaultIgnores, ignores...),
-		Extensions:     excludedExts,
-		ProtonDrive:    protonDrive,
-		DrivePath:      drivePath,
-		VerticalSlices: verticalSlices,
-		SkipFrontend:   skipFrontend,
-		FrontendOnly:   frontendOnly,
-		OmitTest:       omitTest,
-		OmitMd:         omitMd,
+		OutputPath:          output,
+		AppendMode:          appendMd,
+		Force:               force,
+		MaxSize:             maxSize,
+		MaxDepth:            maxDepth,
+		Ignores:             append(DefaultIgnores, ignores...),
+		Extensions:          excludedExts,
+		ProtonDrive:         protonDrive,
+		DrivePath:           drivePath,
+		VerticalSlices:      verticalSlices,
+		SkipFrontend:        skipFrontend,
+		FrontendOnly:        frontendOnly,
+		OmitTest:            omitTest,
+		OmitMd:              omitMd,
+		IncludeInstructions: includeInstructions,
 	}
 
 	if input != "" {

internal/drive/drive.go

@@ -30,7 +30,6 @@ func CheckAuth() error {
 	return nil
 }
 
-// EnsureRemoteParent creates the parent remote directory if it doesn't exist.
 func EnsureRemoteParent(remoteDir string) error {
 	binary, err := Lookup()
 	if err != nil {
@@ -38,37 +37,45 @@ func EnsureRemoteParent(remoteDir string) error {
 	}
 
 	parentDir := filepath.Dir(remoteDir)
-
-	// Try create-folder on the grandparent for the parent
 	grandparent := filepath.Dir(parentDir)
 	parentName := filepath.Base(parentDir)
 
 	cmd := exec.Command(binary, "filesystem", "create-folder", grandparent, parentName)
 	cmd.Stdout = nil
 	cmd.Stderr = nil
-	cmd.Run() // Ignore errors — folder may already exist
+	cmd.Run()
 
 	return nil
 }
 
-// UploadDir uploads an entire local directory to Proton Drive.
-// The local directory's basename becomes the remote directory name.
+func CleanRemote(remoteDir string) {
+	binary, err := Lookup()
+	if err != nil {
+		return
+	}
+
+	cmd := exec.Command(binary, "filesystem", "delete", remoteDir)
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	cmd.Run()
+}
+
 func UploadDir(localDir, remoteDir string) error {
 	binary, err := Lookup()
 	if err != nil {
 		return fmt.Errorf("proton-drive not found in PATH: %w", err)
 	}
 
-	// Ensure parent of remote dir exists
 	if err := EnsureRemoteParent(remoteDir); err != nil {
 		return fmt.Errorf("cannot prepare remote directory: %w", err)
 	}
 
-	// Upload to parent — the local dir's basename creates the remote dir
+	CleanRemote(remoteDir)
+
 	remoteParent := filepath.Dir(remoteDir)
 
 	cmd := exec.Command(binary, "filesystem", "upload", localDir, remoteParent,
-		"--conflict-strategy", "replace")
+		"--folder-conflict-strategy", "replace", "--file-conflict-strategy", "replace")
 
 	var stderr strings.Builder
 	cmd.Stderr = &stderr
@@ -80,7 +87,6 @@ func UploadDir(localDir, remoteDir string) error {
 	return nil
 }
 
-// Upload uploads a single local file to a remote path on Proton Drive.
 func Upload(localPath, remotePath string) error {
 	binary, err := Lookup()
 	if err != nil {
@@ -111,7 +117,7 @@ func Upload(localPath, remotePath string) error {
 
 func runUpload(binary, localPath, remoteDir string) error {
 	cmd := exec.Command(binary, "filesystem", "upload", localPath, remoteDir,
-		"--conflict-strategy", "replace")
+		"--folder-conflict-strategy", "replace", "--file-conflict-strategy", "replace")
 
 	var stderr strings.Builder
 	cmd.Stderr = &stderr

internal/filter/filter.go

@@ -99,6 +99,16 @@ func isTestFile(path, name string) bool {
 		}
 		slashPath := filepath.ToSlash(path)
 		return strings.Contains(slashPath, "/src/test/")
+	case ".py":
+		lower := strings.ToLower(name)
+		if strings.HasPrefix(lower, "test_") || strings.HasSuffix(lower, "_test.py") {
+			return true
+		}
+		if strings.EqualFold(name, "conftest.py") {
+			return true
+		}
+		slashPath := filepath.ToSlash(path)
+		return strings.Contains(slashPath, "/tests/")
 	}
 
 	return false

internal/git/git.go

@@ -0,0 +1,37 @@
+package git
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+type CommitInfo struct {
+	ShortSHA string
+	Message  string
+}
+
+func GetCommitInfo(rootDir string) *CommitInfo {
+	cmd := exec.Command("git", "-C", rootDir, "log", "-1", "--format=%h %s")
+	output, err := cmd.Output()
+	if err != nil {
+		return nil
+	}
+
+	parts := strings.SplitN(strings.TrimSpace(string(output)), " ", 2)
+	if len(parts) < 2 {
+		return nil
+	}
+
+	return &CommitInfo{
+		ShortSHA: parts[0],
+		Message:  parts[1],
+	}
+}
+
+func FormatCommitLine(info *CommitInfo) string {
+	if info == nil {
+		return ""
+	}
+	return fmt.Sprintf("> Commit: %s (%s)\n", info.ShortSHA, info.Message)
+}

internal/instructions/instructions.go

@@ -0,0 +1,41 @@
+package instructions
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const FileName = ".dirmd"
+
+func Read(rootDir string) (string, error) {
+	path := filepath.Join(rootDir, FileName)
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", nil
+		}
+		return "", err
+	}
+	return string(data), nil
+}
+
+func Format(content string) string {
+	if content == "" {
+		return ""
+	}
+	content = strings.TrimSpace(content)
+	if content == "" {
+		return ""
+	}
+	lines := strings.Split(content, "\n")
+	var sb strings.Builder
+	sb.WriteString("> Instructions:\n")
+	for _, line := range lines {
+		sb.WriteString("> ")
+		sb.WriteString(line)
+		sb.WriteString("\n")
+	}
+	sb.WriteString("\n")
+	return sb.String()
+}

internal/renderer/renderer.go

@@ -6,8 +6,11 @@ import (
 	"path/filepath"
 	"sort"
 	"strings"
+	"time"
 	"unicode/utf8"
 
+	"git.flo.fo/FLO/dirmd/internal/git"
+	"git.flo.fo/FLO/dirmd/internal/instructions"
 	"git.flo.fo/FLO/dirmd/internal/tree"
 	"git.flo.fo/FLO/dirmd/internal/walker"
 )
@@ -35,7 +38,18 @@ func Write(result *walker.Result, outputPath string, appendMode bool, singleFile
 		h1Path = filepath.Join(result.AbsRoot, result.Entries[0].RelPath)
 	}
 
-	fmt.Fprintf(&sb, "# %s [ROOT]\n\n", h1Path)
+	fmt.Fprintf(&sb, "# %s [ROOT]\n", h1Path)
+
+	if !appendMode {
+		fmt.Fprintf(&sb, "> Generated: %s\n", time.Now().Format(time.RFC3339))
+		sb.WriteString(git.FormatCommitLine(result.Commit))
+
+		if result.Instructions != "" {
+			sb.WriteString(instructions.Format(result.Instructions))
+		} else {
+			sb.WriteString("\n")
+		}
+	}
 
 	if !singleFile {
 		root := tree.Build(result.Entries)
@@ -53,7 +67,6 @@ func Write(result *walker.Result, outputPath string, appendMode bool, singleFile
 
 		for _, entry := range result.Entries {
 			fullPath := filepath.Join(result.AbsRoot, entry.RelPath)
-
 			content, err := readFileForOutput(fullPath, result.OmitTest)
 			if err != nil {
 				fmt.Fprintf(os.Stderr, "warning: cannot read %s: %v\n", entry.RelPath, err)
@@ -105,12 +118,11 @@ func WriteSlices(result *walker.Result, outputDir, repoName string) ([]string, e
 	}
 
 	var generated []string
-
 	indexBasename := "index_" + repoName + ".md"
 	rootPath := filepath.Join(outputDir, indexBasename)
 	generated = append(generated, rootPath)
 
-	if err := writeRootSlice(rootPath, absRoot, rootName, repoName, rootFiles, topLevelDirs, result.OmitTest); err != nil {
+	if err := writeRootSlice(rootPath, absRoot, rootName, repoName, rootFiles, topLevelDirs, result.OmitTest, result.Commit, result.Instructions); err != nil {
 		return nil, fmt.Errorf("failed to write root slice: %w", err)
 	}
 
@@ -136,16 +148,13 @@ func WriteSlices(result *walker.Result, outputDir, repoName string) ([]string, e
 		for i, e := range dirEntries {
 			sepIdx := strings.Index(e.RelPath, string(filepath.Separator))
 			if sepIdx >= 0 {
-				treeEntries[i] = walker.Entry{
-					RelPath: e.RelPath[sepIdx+1:],
-					Size:    e.Size,
-				}
+				treeEntries[i] = walker.Entry{RelPath: e.RelPath[sepIdx+1:], Size: e.Size}
 			} else {
 				treeEntries[i] = e
 			}
 		}
 
-		if err := writeDirSlice(slicePath, absDir, absRoot, dirName, treeEntries, dirEntries, indexBasename, result.OmitTest); err != nil {
+		if err := writeDirSlice(slicePath, absDir, absRoot, dirName, treeEntries, dirEntries, indexBasename, result.OmitTest, result.Commit, result.Instructions); err != nil {
 			return nil, fmt.Errorf("failed to write slice %s: %w", sliceName, err)
 		}
 	}
@@ -153,7 +162,7 @@ func WriteSlices(result *walker.Result, outputDir, repoName string) ([]string, e
 	return generated, nil
 }
 
-func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker.Entry, topLevelDirs map[string][]walker.Entry, omitTest bool) error {
+func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker.Entry, topLevelDirs map[string][]walker.Entry, omitTest bool, commit *git.CommitInfo, instContent string) error {
 	f, err := os.Create(path)
 	if err != nil {
 		return fmt.Errorf("cannot create root file: %w", err)
@@ -161,8 +170,14 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 	defer f.Close()
 
 	var sb strings.Builder
-
-	fmt.Fprintf(&sb, "# %s [ROOT]\n\n", absRoot)
+	fmt.Fprintf(&sb, "# %s [ROOT]\n", absRoot)
+	fmt.Fprintf(&sb, "> Generated: %s\n", time.Now().Format(time.RFC3339))
+	sb.WriteString(git.FormatCommitLine(commit))
+	if instContent != "" {
+		sb.WriteString(instructions.Format(instContent))
+	} else {
+		sb.WriteString("\n")
+	}
 
 	treeLines := buildTreeWithRefs(rootName, repoName, topLevelDirs, rootFiles)
 	sb.WriteString("## Directory Tree\n\n")
@@ -196,11 +211,7 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 
 	if len(rootFiles) > 0 {
 		sb.WriteString("## Root Contents\n\n")
-
-		sort.Slice(rootFiles, func(i, j int) bool {
-			return rootFiles[i].RelPath < rootFiles[j].RelPath
-		})
-
+		sort.Slice(rootFiles, func(i, j int) bool { return rootFiles[i].RelPath < rootFiles[j].RelPath })
 		for _, entry := range rootFiles {
 			fullPath := filepath.Join(absRoot, entry.RelPath)
 			content, err := readFileForOutput(fullPath, omitTest)
@@ -208,17 +219,14 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 				fmt.Fprintf(os.Stderr, "warning: cannot read %s: %v\n", entry.RelPath, err)
 				continue
 			}
-
 			language := extToLang(filepath.Ext(entry.RelPath))
 			lines := countLines(content)
-
 			fmt.Fprintf(&sb, "--- FILE: ./%s (%d bytes, %d lines) ---\n", entry.RelPath, entry.Size, lines)
 			fmt.Fprintf(&sb, "%s", fenceChars)
 			if language != "" {
 				fmt.Fprintf(&sb, "%s", language)
 			}
-			fmt.Fprintf(&sb, "\n")
-			fmt.Fprintf(&sb, "%s", content)
+			fmt.Fprintf(&sb, "\n%s", content)
 			if !strings.HasSuffix(content, "\n") {
 				fmt.Fprintf(&sb, "\n")
 			}
@@ -230,7 +238,7 @@ func writeRootSlice(path, absRoot, rootName, repoName string, rootFiles []walker
 	return err
 }
 
-func writeDirSlice(path, absDir, absRoot, dirName string, treeEntries, fileEntries []walker.Entry, rootFileName string, omitTest bool) error {
+func writeDirSlice(path, absDir, absRoot, dirName string, treeEntries, fileEntries []walker.Entry, rootFileName string, omitTest bool, commit *git.CommitInfo, instContent string) error {
 	f, err := os.Create(path)
 	if err != nil {
 		return fmt.Errorf("cannot create slice file: %w", err)
@@ -238,24 +246,25 @@ func writeDirSlice(path, absDir, absRoot, dirName string, treeEntries, fileEntri
 	defer f.Close()
 
 	var sb strings.Builder
-
-	fmt.Fprintf(&sb, "# %s [SLICE]\n\n", absDir)
+	fmt.Fprintf(&sb, "# %s [SLICE]\n", absDir)
+	fmt.Fprintf(&sb, "> Generated: %s\n", time.Now().Format(time.RFC3339))
+	sb.WriteString(git.FormatCommitLine(commit))
+	if instContent != "" {
+		sb.WriteString(instructions.Format(instContent))
+	} else {
+		sb.WriteString("\n")
+	}
 	fmt.Fprintf(&sb, "Root document: %s\n\n", rootFileName)
 
 	sb.WriteString("## Directory Tree\n\n")
 	sb.WriteString(fenceChars + "\n")
-
 	sliceTree := buildTreeFromEntries(dirName, treeEntries)
 	sb.WriteString(sliceTree)
 	sb.WriteString(fenceChars + "\n\n")
 
 	if len(fileEntries) > 0 {
 		sb.WriteString("## Contents\n\n")
-
-		sort.Slice(fileEntries, func(i, j int) bool {
-			return fileEntries[i].RelPath < fileEntries[j].RelPath
-		})
-
+		sort.Slice(fileEntries, func(i, j int) bool { return fileEntries[i].RelPath < fileEntries[j].RelPath })
 		for _, entry := range fileEntries {
 			fullPath := filepath.Join(absRoot, entry.RelPath)
 			content, err := readFileForOutput(fullPath, omitTest)
@@ -263,17 +272,14 @@ func writeDirSlice(path, absDir, absRoot, dirName string, treeEntries, fileEntri
 				fmt.Fprintf(os.Stderr, "warning: cannot read %s: %v\n", entry.RelPath, err)
 				continue
 			}
-
 			language := extToLang(filepath.Ext(entry.RelPath))
 			lines := countLines(content)
-
 			fmt.Fprintf(&sb, "--- FILE: ./%s (%d bytes, %d lines) ---\n", entry.RelPath, entry.Size, lines)
 			fmt.Fprintf(&sb, "%s", fenceChars)
 			if language != "" {
 				fmt.Fprintf(&sb, "%s", language)
 			}
-			fmt.Fprintf(&sb, "\n")
-			fmt.Fprintf(&sb, "%s", content)
+			fmt.Fprintf(&sb, "\n%s", content)
 			if !strings.HasSuffix(content, "\n") {
 				fmt.Fprintf(&sb, "\n")
 			}

internal/tui/run.go

@@ -79,6 +79,7 @@ func Run() error {
 					huh.NewOption("Omit test files", "omit-test"),
 					huh.NewOption("Omit non-README markdown", "omit-md"),
 					huh.NewOption("Upload to Proton Drive", "proton-drive"),
+					huh.NewOption("Include .dirmd instructions", "instructions"),
 				).
 				Value(&options).
 				Height(10),
@@ -115,6 +116,7 @@ func Run() error {
 	omitTest := containsOption(options, "omit-test")
 	omitMd := containsOption(options, "omit-md")
 	protonDrive := containsOption(options, "proton-drive")
+	includeInstructions := containsOption(options, "instructions")
 
 	if skipFrontend && frontendOnly {
 		return fmt.Errorf("--skip-frontend and --frontend-only are mutually exclusive")
@@ -155,20 +157,21 @@ func Run() error {
 	allIgnores = append(allIgnores, ignores...)
 
 	cfg := &config.Config{
-		InputPath:      inputDir,
-		OutputPath:     outputDir,
-		Force:          force,
-		MaxSize:        int64(maxSizeKB) * 1024,
-		MaxDepth:       maxDepth,
-		Ignores:        allIgnores,
-		Extensions:     excludedExts,
-		ProtonDrive:    protonDrive,
-		DrivePath:      drivePath,
-		VerticalSlices: verticalSlices,
-		SkipFrontend:   skipFrontend,
-		FrontendOnly:   frontendOnly,
-		OmitTest:       omitTest,
-		OmitMd:         omitMd,
+		InputPath:           inputDir,
+		OutputPath:          outputDir,
+		Force:               force,
+		MaxSize:             int64(maxSizeKB) * 1024,
+		MaxDepth:            maxDepth,
+		Ignores:             allIgnores,
+		Extensions:          excludedExts,
+		ProtonDrive:         protonDrive,
+		DrivePath:           drivePath,
+		VerticalSlices:      verticalSlices,
+		SkipFrontend:        skipFrontend,
+		FrontendOnly:        frontendOnly,
+		OmitTest:            omitTest,
+		OmitMd:              omitMd,
+		IncludeInstructions: includeInstructions,
 	}
 
 	cmd := buildCommand(cfg)

internal/walker/walker.go

@@ -9,6 +9,8 @@ import (
 
 	"git.flo.fo/FLO/dirmd/internal/config"
 	"git.flo.fo/FLO/dirmd/internal/filter"
+	"git.flo.fo/FLO/dirmd/internal/git"
+	"git.flo.fo/FLO/dirmd/internal/instructions"
 )
 
 type Entry struct {
@@ -17,10 +19,12 @@ type Entry struct {
 }
 
 type Result struct {
-	Entries    []Entry
-	AbsRoot    string
-	SingleFile bool
-	OmitTest   bool
+	Entries      []Entry
+	AbsRoot      string
+	SingleFile   bool
+	OmitTest     bool
+	Commit       *git.CommitInfo
+	Instructions string
 }
 
 func Run(cfg *config.Config) (*Result, error) {
@@ -53,11 +57,19 @@ func processSingleFile(cfg *config.Config) (*Result, error) {
 		return nil, fmt.Errorf("file %s filtered out", cfg.AbsRoot)
 	}
 
+	commitInfo := git.GetCommitInfo(filepath.Dir(cfg.AbsRoot))
+	var instContent string
+	if cfg.IncludeInstructions {
+		instContent, _ = instructions.Read(filepath.Dir(cfg.AbsRoot))
+	}
+
 	return &Result{
-		Entries:    []Entry{{RelPath: filepath.Base(cfg.AbsRoot), Size: info.Size()}},
-		AbsRoot:    filepath.Dir(cfg.AbsRoot),
-		SingleFile: true,
-		OmitTest:   cfg.OmitTest,
+		Entries:      []Entry{{RelPath: filepath.Base(cfg.AbsRoot), Size: info.Size()}},
+		AbsRoot:      filepath.Dir(cfg.AbsRoot),
+		SingleFile:   true,
+		OmitTest:     cfg.OmitTest,
+		Commit:       commitInfo,
+		Instructions: instContent,
 	}, nil
 }
 
@@ -73,6 +85,17 @@ func walkDirectory(cfg *config.Config) (*Result, error) {
 
 	result := &Result{AbsRoot: cfg.AbsRoot, OmitTest: cfg.OmitTest}
 	
+	result.Commit = git.GetCommitInfo(cfg.AbsRoot)
+	
+	if cfg.IncludeInstructions {
+		instContent, err := instructions.Read(cfg.AbsRoot)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "warning: could not read .dirmd: %v\n", err)
+		} else {
+			result.Instructions = instContent
+		}
+	}
+
 	err := filepath.WalkDir(cfg.AbsRoot, func(path string, d fs.DirEntry, err error) error {
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "warning: %v\n", err)