commit 3e287bda1a1d09774a3af04630d1655c15317fad
Author: jpmvaz <jpmvaz@me.com>
Date:   Sun Sep 13 19:48:16 2026 +0100

    v3

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5030a4e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,314 @@
+# 📦 Folder Compressor
+
+A command-line Python script that lets you pick any sub-folder to compress, or compress **all folders in one go** — each one individually with its own live progress bar. Uses **7-Zip store mode** (no compression) for maximum speed and zero CPU overhead.
+
+---
+
+## Features
+
+- Browse all sub-folders with their sizes before choosing
+- **Two modes at runtime:**
+  - **Single folder** — select one folder by number
+  - **Compress all** — process every folder sequentially, one by one
+- Real-time progress bar per job showing:
+  - Percentage complete
+  - Elapsed time
+  - Live transfer speed (MB/s)
+  - File count
+  - Currently processing file name
+- Pause between jobs in batch mode so you can read each result before continuing
+- Batch summary table at the end showing all jobs, sizes, times, and speeds
+- Color-coded terminal output (auto-disabled if not supported)
+- Cross-platform: Windows, macOS, Linux
+
+---
+
+## Requirements
+
+### Python
+Version **3.10 or higher** is required (uses `str | None` union type syntax).
+
+Check your version:
+```bash
+python --version
+# or
+python3 --version
+```
+
+No third-party packages are needed — only Python's standard library is used.
+
+### 7-Zip
+7-Zip must be installed and accessible on your system PATH.
+
+| Platform | Install command |
+|----------|----------------|
+| **Linux** (Debian/Ubuntu) | `sudo apt install p7zip-full` |
+| **Linux** (Fedora/RHEL) | `sudo dnf install p7zip p7zip-plugins` |
+| **macOS** (Homebrew) | `brew install p7zip` |
+| **macOS** (MacPorts) | `sudo port install p7zip` |
+| **Windows** | Download installer from [https://www.7-zip.org/download.html](https://www.7-zip.org/download.html) |
+
+> **Windows note:** After installing, make sure `C:\Program Files\7-Zip\` is added to your system PATH, or the script will auto-detect it from the default install location automatically.
+
+> **Minimum version:** 7-Zip **15.06 or newer** is required for the `-bsp1` progress flag used for real-time output. Most current installs will meet this requirement.
+
+Verify 7-Zip is available:
+```bash
+7z i
+```
+
+---
+
+## Installation
+
+No installation needed. Just download the script:
+
+```bash
+# Download compress_folder.py to any directory, then run it directly with Python
+```
+
+Optionally make it executable on Linux/macOS:
+```bash
+chmod +x compress_folder.py
+```
+
+---
+
+## Usage
+
+### Basic — scan the current directory
+```bash
+python compress_folder.py
+```
+
+### Specify a directory to scan
+```bash
+python compress_folder.py /path/to/directory
+```
+
+### On Linux/macOS (if made executable)
+```bash
+./compress_folder.py
+./compress_folder.py /path/to/directory
+```
+
+### On Windows
+```bash
+python compress_folder.py
+python compress_folder.py C:\Users\YourName\Documents
+```
+
+---
+
+## Step-by-step walkthrough
+
+### Step 1 — Launch the script
+
+```
+📦  Folder Compressor
+    Scanning: /home/user/projects
+```
+
+### Step 2 — Browse folders and choose a mode
+
+All sub-folders are listed with their sizes, followed by the option to compress all:
+
+```
+Available folders:
+
+  [  1]  archive  (240.0 MB)
+  [  2]  builds   (1.4 GB)
+  [  3]  logs     (88.3 MB)
+  [  4]  source   (320.5 MB)
+
+  [  A]  Compress ALL folders one by one
+
+Enter a folder number or  A  to compress all:
+```
+
+**To compress a single folder:** type its number and press Enter.  
+**To compress all folders:** type `A` and press Enter.
+
+---
+
+### Single folder mode
+
+```
+Enter a folder number or  A  to compress all: 2
+
+  ✔  Mode: Single folder  →  builds
+  Calculating source size… 1.4 GB
+
+  ────────────────────────────────────────────────────────────────
+
+  ████████████████░░░░░░░░░░░░░░░░░░░   62%  elapsed 0m 08s  178.4 MB/s  files: 312
+  ↳ builds/release/v2.1.0/installer.exe
+
+  ────────────────────────────────────────────────────────────────
+
+  ✅  Archive created successfully!
+     Path     : /home/user/projects/builds.7z
+     Source   : 1.4 GB
+     Archive  : 1.4 GB
+     Time     : 0m 09s
+     Avg speed: 159.2 MB/s
+```
+
+---
+
+### Compress all mode
+
+Each folder gets a numbered job header and its own progress bar. Each folder gets a numbered job header and its own progress bar. As soon as one job finishes and displays its stats, the next one starts automatically:
+
+```
+Enter a folder number or  A  to compress all: A
+
+  ✔  Mode: Compress all folders sequentially
+
+
+  [1/4]  archive  ────────────────────────────────────────────
+
+  Calculating source size… 240.0 MB
+  ...
+  ✅  Archive created successfully!  (240.0 MB · 1s · 240.0 MB/s)
+
+
+  [2/4]  builds  ─────────────────────────────────────────────
+
+  ...
+```
+
+After all jobs complete, a **batch summary** is printed:
+
+```
+  ══════════════════════════════════════════════════════════════════
+  BATCH SUMMARY  —  4 folder(s) processed
+  ══════════════════════════════════════════════════════════════════
+  ✅  archive        240.0 MB  →  1s   @  240.0 MB/s
+  ✅  builds           1.4 GB  →  9s   @  159.2 MB/s
+  ✅  logs            88.3 MB  →  0s   @  310.5 MB/s
+  ✅  source         320.5 MB  →  2s   @  192.1 MB/s
+  ──────────────────────────────────────────────────────────────────
+  Total source size : 2.0 GB
+  Total archive size: 2.0 GB
+  Total time        : 12s
+  Overall avg speed : 170.4 MB/s
+  ══════════════════════════════════════════════════════════════════
+```
+
+If any jobs fail, they are flagged in the summary with their error code.
+
+---
+
+## Progress bar reference
+
+| Element | Description |
+|---------|-------------|
+| `████░░░` | Progress bar filling left to right |
+| `62%` | Percentage of data processed |
+| `elapsed 0m 08s` | Time since this job started |
+| `178.4 MB/s` | Rolling average throughput speed |
+| `files: 312` | Number of files added so far |
+| `↳ filename` | The file currently being processed |
+
+---
+
+## Compression settings
+
+The script uses the following 7-Zip flags:
+
+| Flag | Value | Meaning |
+|------|-------|---------|
+| `-t7z` | — | Output format: 7z |
+| `-mx=0` | 0 | Compression level 0 = **store** (no compression) |
+| `-ms=off` | off | Solid archive **disabled** (faster for many files) |
+| `-bsp1` | — | Stream progress output to stdout (enables live display) |
+
+**Why no compression?**  
+Store mode (`-mx=0`) copies files into the archive as-is without compressing them. This is ideal when:
+- Speed matters more than file size reduction
+- The contents are already compressed (videos, images, zip files, etc.)
+- You want to bundle files for transfer without the CPU cost of compression
+
+---
+
+## How the real-time progress works
+
+7-Zip does not write progress on separate lines — instead it continuously overwrites the same terminal line using special control characters. The exact character it uses depends on the platform:
+
+| Platform | Character used | Code |
+|----------|---------------|------|
+| Linux / macOS | Backspace | `\x08` |
+| Windows | Carriage return | `\r` |
+
+The script reads 7-Zip's output as a raw binary stream and splits on **both** characters, so progress is captured correctly on every platform. The percentage, file count, and current filename are extracted from each segment using a regex and rendered live into two reserved terminal lines that update in place.
+
+---
+
+## Output location
+
+Each archive is created in the **same directory that contains the source folder**.
+
+Example:
+```
+/home/user/projects/          ← scanned directory
+    archive/                  ← source folder
+    archive.7z                ← archive created here
+    builds/
+    builds.7z
+```
+
+If an archive with the same name already exists, 7-Zip will update it (adding/replacing files). Delete the existing `.7z` first if you want a clean archive.
+
+---
+
+## Interrupting a batch
+
+Press `Ctrl+C` at any point during a batch to stop early. Any jobs already completed will have their archives saved. A partial batch summary will be printed for the jobs that ran.
+
+---
+
+## Troubleshooting
+
+**`7-Zip not found` error**
+- Ensure 7-Zip is installed (see Requirements above)
+- Confirm `7z` is on your PATH: run `which 7z` (Linux/macOS) or `where 7z` (Windows)
+- On Windows, try re-installing 7-Zip and ticking the "Add to PATH" option, or place `7z.exe` in `C:\Program Files\7-Zip\` which the script checks automatically
+
+**Progress bar stays at 0% / no stats shown**
+- Make sure you are using the latest version of the script
+- The root cause of this bug was that Windows 7-Zip uses `\r` to update progress lines while Linux/macOS uses `\x08` (backspace). The current version handles both
+- If you still see 0% after updating, confirm your 7-Zip version is 15.06 or newer: run `7z i` and check the version line at the top
+
+**No progress bar / garbled output**
+- The live progress display requires a terminal that supports ANSI escape codes
+- On older Windows CMD, switch to Windows Terminal or PowerShell
+- Progress and stats are still printed even if color/ANSI is not supported
+
+**`SyntaxError` on startup**
+- Your Python version is below 3.10 — upgrade to Python 3.10+
+
+**Permission denied on folder**
+- Run the script with elevated permissions (`sudo` on Linux/macOS, Run as Administrator on Windows)
+- Or select a folder you have read access to
+
+---
+
+## Examples
+
+```bash
+# Compress a single folder or all folders in the current directory
+python compress_folder.py
+
+# Compress a single folder or all folders inside a specific path
+python compress_folder.py /mnt/data/backups
+
+# Windows example
+python compress_folder.py "C:\Users\Alice\Desktop"
+```
+
+---
+
+## License
+
+This script is provided as-is for personal and commercial use. No warranty is expressed or implied.
diff --git a/compress_folder.py b/compress_folder.py
new file mode 100644
index 0000000..94a90a2
--- /dev/null
+++ b/compress_folder.py
@@ -0,0 +1,427 @@
+#!/usr/bin/env python3
+"""
+Folder Compressor using 7-Zip
+- Select a single folder to compress, OR
+- Compress all folders one by one automatically
+Uses 7-Zip store mode (no compression) for maximum speed.
+Real-time progress bar shown during each compression job.
+"""
+
+import os
+import re
+import sys
+import shutil
+import subprocess
+import time
+from pathlib import Path
+from dataclasses import dataclass
+
+
+# ── Terminal color helpers ────────────────────────────────────────────────────
+
+SUPPORTS_COLOR = (
+    sys.stdout.isatty()
+    and (sys.platform != "win32" or os.environ.get("WT_SESSION") or os.environ.get("TERM"))
+)
+
+def _c(code: str, text: str) -> str:
+    return f"\033[{code}m{text}\033[0m" if SUPPORTS_COLOR else text
+
+def green(t):   return _c("32", t)
+def yellow(t):  return _c("33", t)
+def cyan(t):    return _c("36", t)
+def bold(t):    return _c("1",  t)
+def dim(t):     return _c("2",  t)
+def red(t):     return _c("31", t)
+def magenta(t): return _c("35", t)
+
+
+# ── Size / time formatters ────────────────────────────────────────────────────
+
+def fmt_size(b: float) -> str:
+    for unit in ("B", "KB", "MB", "GB", "TB"):
+        if b < 1024:
+            return f"{b:.1f} {unit}"
+        b /= 1024
+    return f"{b:.1f} PB"
+
+
+def fmt_time(seconds: float) -> str:
+    s = int(seconds)
+    if s < 60:
+        return f"{s}s"
+    m, s = divmod(s, 60)
+    if m < 60:
+        return f"{m}m {s:02d}s"
+    h, m = divmod(m, 60)
+    return f"{h}h {m:02d}m {s:02d}s"
+
+
+# ── Folder size calculator ────────────────────────────────────────────────────
+
+def folder_size(path: Path) -> int:
+    total = 0
+    for root, _, files in os.walk(path):
+        for f in files:
+            try:
+                total += os.path.getsize(os.path.join(root, f))
+            except OSError:
+                pass
+    return total
+
+
+# ── 7-Zip locator ─────────────────────────────────────────────────────────────
+
+def find_7zip() -> str | None:
+    for name in ("7z", "7za", "7zz", "7zip"):
+        path = shutil.which(name)
+        if path:
+            return path
+    if sys.platform == "win32":
+        for p in (
+            r"C:\Program Files\7-Zip\7z.exe",
+            r"C:\Program Files (x86)\7-Zip\7z.exe",
+        ):
+            if os.path.isfile(p):
+                return p
+    return None
+
+
+# ── Folder listing ────────────────────────────────────────────────────────────
+
+def list_folders(base_dir: str) -> list[Path]:
+    base = Path(base_dir)
+    return sorted(
+        (e for e in base.iterdir() if e.is_dir()),
+        key=lambda p: p.name.lower(),
+    )
+
+
+# ── Mode + folder selection menu ─────────────────────────────────────────────
+
+def prompt_mode_and_selection(folders: list[Path]) -> list[Path]:
+    """
+    Print the folder list then ask the user what to do:
+      A  — compress ALL folders sequentially
+      1…N — compress a single specific folder
+    Returns the list of folders to compress (one or all).
+    """
+    print("\nAvailable folders:\n")
+    for i, folder in enumerate(folders, start=1):
+        try:
+            sz = folder_size(folder)
+            size_label = dim(f"  ({fmt_size(sz)})")
+        except PermissionError:
+            size_label = dim("  (no access)")
+        print(f"  {dim(f'[{i:>3}]')}  {folder.name}{size_label}")
+
+    print()
+    print(f"  {dim('[  A]')}  {bold('Compress ALL folders one by one')}")
+    print()
+
+    while True:
+        try:
+            raw = input("Enter a folder number or  A  to compress all: ").strip().upper()
+
+            if raw == "A":
+                print(f"\n  {green('✔')}  Mode: {bold('Compress all folders sequentially')}")
+                return list(folders)
+
+            idx = int(raw)
+            if 1 <= idx <= len(folders):
+                chosen = folders[idx - 1]
+                print(f"\n  {green('✔')}  Mode: {bold('Single folder')}  →  {chosen.name}")
+                return [chosen]
+
+            print(f"  Please enter a number between 1 and {len(folders)}, or A.")
+
+        except ValueError:
+            print("  Invalid input — enter a number or A.")
+        except (EOFError, KeyboardInterrupt):
+            print("\nAborted.")
+            sys.exit(0)
+
+
+# ── Progress bar renderer ─────────────────────────────────────────────────────
+
+BAR_WIDTH = 36
+
+_PROGRESS_RE = re.compile(r"(\d{1,3})%(?:\s+(\d+)\s*\+?\s*(.*))?")
+
+# Split on backspaces (\x08, Linux/macOS) or carriage returns (\r, Windows)
+_SPLIT_RE = re.compile(rb"[\x08\r]+")
+
+
+def _move_up(n: int):
+    if SUPPORTS_COLOR:
+        sys.stdout.write(f"\033[{n}A")
+
+
+def _clear_line():
+    if SUPPORTS_COLOR:
+        sys.stdout.write("\033[2K\r")
+    else:
+        sys.stdout.write("\r" + " " * 78 + "\r")
+
+
+def _redraw(pct: int, elapsed: float, files_done: int,
+            current_file: str, speed_bps: float):
+    filled  = int(BAR_WIDTH * pct / 100)
+    bar     = "█" * filled + "░" * (BAR_WIDTH - filled)
+    color   = green if pct == 100 else cyan
+    speed_s = f"{fmt_size(speed_bps)}/s" if speed_bps > 0 else "─"
+
+    _move_up(2)
+
+    _clear_line()
+    sys.stdout.write(
+        f"  {color(bar)}  {bold(f'{pct:>3}%')}"
+        f"  {dim('elapsed')} {dim(fmt_time(elapsed))}"
+        f"  {yellow(speed_s)}"
+        f"  {dim(f'files: {files_done}')}\n"
+    )
+
+    _clear_line()
+    label = current_file.strip() or "starting…"
+    if len(label) > 60:
+        label = "…" + label[-59:]
+    sys.stdout.write(f"  {dim('↳ ' + label)}\n")
+
+    sys.stdout.flush()
+
+
+# ── Result record ─────────────────────────────────────────────────────────────
+
+@dataclass
+class JobResult:
+    folder:      Path
+    archive:     Path | None
+    src_size:    int
+    arc_size:    int
+    elapsed:     float
+    avg_speed:   float
+    success:     bool
+    error:       str = ""
+
+
+# ── Single compression job ────────────────────────────────────────────────────
+
+def compress_folder(seven_zip: str, folder: Path, output_dir: Path,
+                    job_label: str = "") -> JobResult:
+    archive_path = output_dir / (folder.name + ".7z")
+
+    if job_label:
+        print(f"\n{job_label}")
+
+    print(f"\n  {dim('Calculating source size…')} ", end="", flush=True)
+    src_size = folder_size(folder)
+    print(fmt_size(src_size))
+
+    cmd = [
+        seven_zip,
+        "a",
+        "-t7z",
+        "-mx=0",
+        "-ms=off",
+        "-bsp1",
+        str(archive_path),
+        str(folder),
+    ]
+
+    print(f"\n  {dim('Command: ' + ' '.join(cmd))}")
+    print()
+    print("  " + "─" * 64)
+    print()
+    print()
+
+    start_time   = time.monotonic()
+    files_done   = 0
+    current_file = ""
+    speed_bps    = 0.0
+    last_bytes   = 0.0
+    speed_ts     = start_time
+
+    proc = subprocess.Popen(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+    )
+
+    buf = b""
+
+    while True:
+        chunk = proc.stdout.read(256)
+        if not chunk:
+            break
+
+        buf    += chunk
+        elapsed = time.monotonic() - start_time
+        segments = _SPLIT_RE.split(buf)
+        buf = segments[-1]
+
+        for seg in segments[:-1]:
+            text = seg.decode("utf-8", errors="replace").strip()
+            if not text:
+                continue
+
+            m = _PROGRESS_RE.search(text)
+            if m:
+                pct        = min(int(m.group(1)), 100)
+                files_done = int(m.group(2)) if m.group(2) else files_done
+                fname      = (m.group(3) or "").strip()
+                if fname:
+                    current_file = fname
+
+                if src_size > 0 and pct > 0:
+                    bytes_done = src_size * pct / 100
+                    now        = time.monotonic()
+                    dt         = now - speed_ts
+                    if dt >= 0.4:
+                        speed_bps  = (bytes_done - last_bytes) / dt
+                        last_bytes = bytes_done
+                        speed_ts   = now
+
+                _redraw(pct, elapsed, files_done, current_file, speed_bps)
+
+    proc.wait()
+    elapsed_total = time.monotonic() - start_time
+
+    if proc.returncode == 0:
+        _redraw(100, elapsed_total, files_done, current_file, speed_bps)
+
+    print()
+    print("  " + "─" * 64)
+
+    if proc.returncode == 0:
+        arc_size  = archive_path.stat().st_size
+        avg_speed = src_size / elapsed_total if elapsed_total > 0 else 0
+
+        print(f"\n  {green('✅  Archive created successfully!')}")
+        print(f"     {bold('Path')}     : {archive_path}")
+        print(f"     {bold('Source')}   : {fmt_size(src_size)}")
+        print(f"     {bold('Archive')}  : {fmt_size(arc_size)}")
+        print(f"     {bold('Time')}     : {fmt_time(elapsed_total)}")
+        print(f"     {bold('Avg speed')}: {fmt_size(avg_speed)}/s")
+
+        return JobResult(
+            folder=folder, archive=archive_path,
+            src_size=src_size, arc_size=arc_size,
+            elapsed=elapsed_total, avg_speed=avg_speed,
+            success=True,
+        )
+    else:
+        msg = f"7-Zip exited with code {proc.returncode}"
+        print(f"\n  {red(f'❌  {msg}')}")
+        return JobResult(
+            folder=folder, archive=None,
+            src_size=src_size, arc_size=0,
+            elapsed=elapsed_total, avg_speed=0,
+            success=False, error=msg,
+        )
+
+
+# ── Batch summary ─────────────────────────────────────────────────────────────
+
+def print_batch_summary(results: list[JobResult]):
+    succeeded = [r for r in results if r.success]
+    failed    = [r for r in results if not r.success]
+    total_src = sum(r.src_size for r in results)
+    total_arc = sum(r.arc_size for r in results)
+    total_t   = sum(r.elapsed  for r in results)
+
+    width = 66
+    print()
+    print("  " + "═" * width)
+    print(f"  {bold('BATCH SUMMARY')}  —  {len(results)} folder(s) processed")
+    print("  " + "═" * width)
+
+    for r in results:
+        icon  = green("✅") if r.success else red("❌")
+        label = r.folder.name
+        if len(label) > 38:
+            label = label[:35] + "…"
+        if r.success:
+            detail = f"{fmt_size(r.src_size)}  →  {fmt_time(r.elapsed)}  @  {fmt_size(r.avg_speed)}/s"
+        else:
+            detail = red(r.error)
+        print(f"  {icon}  {label:<38}  {dim(detail)}")
+
+    print("  " + "─" * width)
+    print(f"  {bold('Total source size')} : {fmt_size(total_src)}")
+    print(f"  {bold('Total archive size')}: {fmt_size(total_arc)}")
+    print(f"  {bold('Total time')}        : {fmt_time(total_t)}")
+    if total_t > 0:
+        avg = total_src / total_t
+        print(f"  {bold('Overall avg speed')} : {fmt_size(avg)}/s")
+    if failed:
+        print()
+        print(f"  {red(f'⚠  {len(failed)} job(s) failed:')}")
+        for r in failed:
+            print(f"     • {r.folder.name}  —  {r.error}")
+    print("  " + "═" * width)
+    print()
+
+
+# ── Entry point ───────────────────────────────────────────────────────────────
+
+def main():
+    scan_dir = os.path.abspath(sys.argv[1] if len(sys.argv) > 1 else os.getcwd())
+
+    if not os.path.isdir(scan_dir):
+        print(f"Error: '{scan_dir}' is not a valid directory.")
+        sys.exit(1)
+
+    print(f"\n{bold('📦  Folder Compressor')}")
+    print(f"    Scanning: {cyan(scan_dir)}\n")
+
+    seven_zip = find_7zip()
+    if not seven_zip:
+        print(
+            f"\n{red('❌  7-Zip not found.')}\n"
+            "    Install it and make sure '7z' (or '7za') is on your PATH.\n"
+            "    • Linux  : sudo apt install p7zip-full\n"
+            "    • macOS  : brew install p7zip\n"
+            "    • Windows: https://www.7-zip.org/download.html"
+        )
+        sys.exit(1)
+
+    print(f"  {green('✔')}  7-Zip: {dim(seven_zip)}")
+
+    folders = list_folders(scan_dir)
+    if not folders:
+        print(f"\nNo sub-folders found in '{scan_dir}'.")
+        sys.exit(0)
+
+    targets = prompt_mode_and_selection(folders)
+
+    batch = len(targets) > 1
+    results: list[JobResult] = []
+
+    for i, folder in enumerate(targets, start=1):
+        label = ""
+        if batch:
+            label = (
+                f"\n  {magenta(f'[{i}/{len(targets)}]')}  "
+                f"{bold(folder.name)}"
+                f"  {dim('─' * max(0, 44 - len(folder.name)))}"
+            )
+
+        result = compress_folder(seven_zip, folder, folder.parent, job_label=label)
+        results.append(result)
+
+        # In batch mode, allow Ctrl+C between jobs to abort remaining work
+        if batch and i < len(targets):
+            try:
+                time.sleep(0)  # yield to allow KeyboardInterrupt to surface
+            except KeyboardInterrupt:
+                print(f"\n  {yellow('⚠  Batch interrupted by user.')}")
+                break
+
+    if batch:
+        print_batch_summary(results)
+    else:
+        print()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/install_dependencies.py b/install_dependencies.py
new file mode 100644
index 0000000..66de6ff
--- /dev/null
+++ b/install_dependencies.py
@@ -0,0 +1,308 @@
+#!/usr/bin/env python3
+"""
+install_dependencies.py
+Installs all requirements for compress_folder.py:
+  - Checks the Python version (3.10+)
+  - Detects the OS and installs 7-Zip via the appropriate method
+  - Verifies the installation when done
+"""
+
+import os
+import sys
+import shutil
+import subprocess
+import platform
+
+
+# ── Terminal colors (no third-party deps needed here either) ─────────────────
+
+IS_TTY = sys.stdout.isatty()
+
+def _c(code, text):
+    return f"\033[{code}m{text}\033[0m" if IS_TTY else text
+
+def green(t):  return _c("32", t)
+def yellow(t): return _c("33", t)
+def cyan(t):   return _c("36", t)
+def bold(t):   return _c("1",  t)
+def dim(t):    return _c("2",  t)
+def red(t):    return _c("31", t)
+
+
+# ── Helpers ───────────────────────────────────────────────────────────────────
+
+def header(text):
+    print(f"\n{bold('── ' + text + ' ' + '─' * max(0, 54 - len(text)))}")
+
+def ok(text):    print(f"  {green('✔')}  {text}")
+def info(text):  print(f"  {cyan('ℹ')}  {text}")
+def warn(text):  print(f"  {yellow('⚠')}  {text}")
+def fail(text):  print(f"  {red('✘')}  {text}")
+
+def run(cmd, check=True, capture=False):
+    """Run a shell command, print it first, and return the CompletedProcess."""
+    print(f"\n  {dim('$')} {dim(' '.join(cmd))}")
+    return subprocess.run(
+        cmd,
+        check=check,
+        capture_output=capture,
+        text=True,
+    )
+
+
+# ── Step 1: Python version ────────────────────────────────────────────────────
+
+def check_python():
+    header("Checking Python version")
+    major, minor = sys.version_info[:2]
+    ver = f"{major}.{minor}.{sys.version_info.micro}"
+    if (major, minor) >= (3, 10):
+        ok(f"Python {ver}  — requirement satisfied (3.10+)")
+        return True
+    else:
+        fail(f"Python {ver} is too old. compress_folder.py requires Python 3.10 or higher.")
+        info("Download the latest Python from https://www.python.org/downloads/")
+        return False
+
+
+# ── Step 2: Detect OS and pick install strategy ───────────────────────────────
+
+def detect_os() -> dict:
+    """Return a dict describing the OS and the best install method."""
+    system = platform.system()
+
+    if system == "Windows":
+        return {"os": "windows"}
+
+    if system == "Darwin":
+        brew   = shutil.which("brew")
+        port   = shutil.which("port")
+        method = "homebrew" if brew else ("macports" if port else "manual")
+        return {"os": "macos", "method": method, "brew": brew, "port": port}
+
+    if system == "Linux":
+        # Identify distro family
+        for mgr, cmd in (
+            ("apt",  ["apt", "--version"]),
+            ("dnf",  ["dnf", "--version"]),
+            ("yum",  ["yum", "--version"]),
+            ("pacman", ["pacman", "--version"]),
+            ("zypper", ["zypper", "--version"]),
+        ):
+            if shutil.which(mgr):
+                return {"os": "linux", "manager": mgr}
+        return {"os": "linux", "manager": None}
+
+    return {"os": "unknown"}
+
+
+# ── Step 3: Install 7-Zip ─────────────────────────────────────────────────────
+
+def already_installed() -> str | None:
+    """Return the path to 7-Zip if it is already on PATH."""
+    for name in ("7z", "7za", "7zz"):
+        path = shutil.which(name)
+        if path:
+            return path
+    if sys.platform == "win32":
+        for p in (
+            r"C:\Program Files\7-Zip\7z.exe",
+            r"C:\Program Files (x86)\7-Zip\7z.exe",
+        ):
+            if os.path.isfile(p):
+                return p
+    return None
+
+
+def get_7zip_version(path: str) -> str:
+    """Return the version string reported by 7-Zip."""
+    try:
+        result = subprocess.run(
+            [path, "i"], capture_output=True, text=True, check=False
+        )
+        for line in (result.stdout + result.stderr).splitlines():
+            if "7-Zip" in line:
+                return line.strip()
+    except Exception:
+        pass
+    return "(version unknown)"
+
+
+def install_linux(manager: str) -> bool:
+    install_cmds = {
+        "apt":    ["sudo", "apt", "install", "-y", "p7zip-full"],
+        "dnf":    ["sudo", "dnf", "install", "-y", "p7zip", "p7zip-plugins"],
+        "yum":    ["sudo", "yum", "install", "-y", "p7zip", "p7zip-plugins"],
+        "pacman": ["sudo", "pacman", "-S", "--noconfirm", "p7zip"],
+        "zypper": ["sudo", "zypper", "install", "-y", "p7zip"],
+    }
+    cmd = install_cmds.get(manager)
+    if not cmd:
+        return False
+    try:
+        run(cmd)
+        return True
+    except subprocess.CalledProcessError:
+        return False
+
+
+def install_macos(method: str, brew: str | None, port: str | None) -> bool:
+    if method == "homebrew":
+        try:
+            run([brew, "install", "p7zip"])
+            return True
+        except subprocess.CalledProcessError:
+            return False
+    if method == "macports":
+        try:
+            run(["sudo", port, "install", "p7zip"])
+            return True
+        except subprocess.CalledProcessError:
+            return False
+    return False
+
+
+def install_windows() -> bool:
+    """Try winget first, then chocolatey, then fall back to manual."""
+    if shutil.which("winget"):
+        try:
+            run(["winget", "install", "--id", "7zip.7zip", "-e", "--silent"])
+            return True
+        except subprocess.CalledProcessError:
+            pass
+
+    if shutil.which("choco"):
+        try:
+            run(["choco", "install", "7zip", "-y"])
+            return True
+        except subprocess.CalledProcessError:
+            pass
+
+    return False
+
+
+def install_7zip(os_info: dict) -> bool:
+    header("Installing 7-Zip")
+
+    # Already present?
+    path = already_installed()
+    if path:
+        ver = get_7zip_version(path)
+        ok(f"7-Zip is already installed:  {dim(path)}")
+        ok(f"{dim(ver)}")
+        return True
+
+    system = os_info["os"]
+
+    if system == "linux":
+        manager = os_info.get("manager")
+        if not manager:
+            fail("No supported package manager found (apt / dnf / yum / pacman / zypper).")
+            info("Install 7-Zip manually: https://www.7-zip.org/download.html")
+            return False
+        info(f"Using package manager: {bold(manager)}")
+        success = install_linux(manager)
+
+    elif system == "macos":
+        method = os_info.get("method", "manual")
+        if method == "manual":
+            fail("Neither Homebrew nor MacPorts was found.")
+            info("Install Homebrew first:  https://brew.sh")
+            info("Then re-run this script, or install p7zip manually.")
+            return False
+        info(f"Using: {bold(method)}")
+        success = install_macos(method, os_info.get("brew"), os_info.get("port"))
+
+    elif system == "windows":
+        info("Trying winget → chocolatey …")
+        success = install_windows()
+        if not success:
+            fail("Automatic install failed.")
+            info("Download 7-Zip manually from: https://www.7-zip.org/download.html")
+            info("After installing, re-run this script to verify.")
+            return False
+
+    else:
+        fail(f"Unsupported OS: {platform.system()}")
+        info("Install 7-Zip manually: https://www.7-zip.org/download.html")
+        return False
+
+    if not success:
+        fail("Installation command failed. Check the output above for details.")
+        return False
+
+    return True
+
+
+# ── Step 4: Verify everything ─────────────────────────────────────────────────
+
+def verify():
+    header("Verifying installation")
+
+    path = already_installed()
+    if path:
+        ver = get_7zip_version(path)
+        ok(f"7-Zip found:  {dim(path)}")
+        ok(f"{dim(ver)}")
+        return True
+    else:
+        fail("7-Zip still not found on PATH after installation.")
+        warn("You may need to restart your terminal or add 7-Zip to your PATH manually.")
+        if sys.platform == "win32":
+            info("Typical Windows location: C:\\Program Files\\7-Zip\\")
+            info("Add that directory to your PATH environment variable.")
+        return False
+
+
+# ── Main ──────────────────────────────────────────────────────────────────────
+
+def main():
+    print(f"\n{bold('🔧  compress_folder.py — Dependency Installer')}")
+    print(f"    Platform: {cyan(platform.system())} {platform.release()}  |  "
+          f"Python {sys.version.split()[0]}")
+
+    all_ok = True
+
+    # 1. Python check
+    if not check_python():
+        all_ok = False
+
+    # 2. Detect OS
+    header("Detecting operating system")
+    os_info = detect_os()
+    system  = os_info["os"]
+
+    if system == "linux":
+        mgr = os_info.get("manager", "unknown")
+        ok(f"Linux detected  —  package manager: {bold(mgr)}")
+    elif system == "macos":
+        method = os_info.get("method", "manual")
+        ok(f"macOS detected  —  install method: {bold(method)}")
+    elif system == "windows":
+        ok("Windows detected")
+    else:
+        warn(f"Unrecognised OS: {platform.system()}")
+
+    # 3. Install 7-Zip
+    if not install_7zip(os_info):
+        all_ok = False
+
+    # 4. Verify
+    verified = verify()
+    if not verified:
+        all_ok = False
+
+    # 5. Final report
+    header("Summary")
+    if all_ok and verified:
+        print(f"\n  {green('✅  All dependencies satisfied.')}")
+        print(f"     You are ready to run:  {bold('python compress_folder.py')}\n")
+    else:
+        print(f"\n  {yellow('⚠  One or more steps did not complete successfully.')}")
+        print( "     Review the output above and resolve any issues before running")
+        print(f"     {bold('compress_folder.py')}.\n")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/old_01/README.md b/old_01/README.md
new file mode 100644
index 0000000..1061695
--- /dev/null
+++ b/old_01/README.md
@@ -0,0 +1,253 @@
+# 📦 Folder Compressor
+
+A command-line Python script that lets you pick any sub-folder and compress it into a `.7z` archive using **7-Zip** with **no compression (store mode)** — maximum speed, zero CPU overhead.
+
+---
+
+## Features
+
+- Browse and select from all sub-folders in any directory
+- Displays folder sizes before you choose
+- Real-time progress bar with:
+  - Percentage complete
+  - Elapsed time
+  - Live transfer speed (MB/s)
+  - File count
+  - Currently processing file name
+- Summary report on completion (source size, archive size, time, avg speed)
+- Color-coded terminal output (auto-disabled if not supported)
+- Cross-platform: Windows, macOS, Linux
+
+---
+
+## Requirements
+
+### Python
+Version **3.10 or higher** is required (uses `str | None` union type syntax).
+
+Check your version:
+```bash
+python --version
+# or
+python3 --version
+```
+
+No third-party packages are needed — only Python's standard library is used.
+
+### 7-Zip
+7-Zip must be installed and accessible on your system PATH.
+
+| Platform | Install command |
+|----------|----------------|
+| **Linux** (Debian/Ubuntu) | `sudo apt install p7zip-full` |
+| **Linux** (Fedora/RHEL) | `sudo dnf install p7zip p7zip-plugins` |
+| **macOS** (Homebrew) | `brew install p7zip` |
+| **macOS** (MacPorts) | `sudo port install p7zip` |
+| **Windows** | Download installer from [https://www.7-zip.org/download.html](https://www.7-zip.org/download.html) |
+
+> **Windows note:** After installing, make sure `C:\Program Files\7-Zip\` is added to your system PATH, or the script will auto-detect it from the default install location automatically.
+
+> **Minimum version:** 7-Zip **15.06 or newer** is required for the `-bsp1` progress flag used for real-time output. Most current installs will meet this requirement.
+
+Verify 7-Zip is available:
+```bash
+7z i
+```
+
+---
+
+## Installation
+
+No installation needed. Just download the script:
+
+```bash
+# Download compress_folder.py to any directory, then run it directly with Python
+```
+
+Optionally make it executable on Linux/macOS:
+```bash
+chmod +x compress_folder.py
+```
+
+---
+
+## Usage
+
+### Basic — scan the current directory
+```bash
+python compress_folder.py
+```
+
+### Specify a directory to scan
+```bash
+python compress_folder.py /path/to/directory
+```
+
+### On Linux/macOS (if made executable)
+```bash
+./compress_folder.py
+./compress_folder.py /path/to/directory
+```
+
+### On Windows
+```bash
+python compress_folder.py
+python compress_folder.py C:\Users\YourName\Documents
+```
+
+---
+
+## Step-by-step walkthrough
+
+**1. Launch the script**
+```
+📦  Folder Compressor
+    Scanning: /home/user/projects
+```
+
+**2. Browse the folder list**
+
+All sub-folders are listed with their sizes:
+```
+Available folders:
+
+  [  1]  archive  (240.0 MB)
+  [  2]  builds   (1.4 GB)
+  [  3]  logs     (88.3 MB)
+  [  4]  source   (320.5 MB)
+
+Enter the number of the folder to compress:
+```
+
+**3. Select a folder**
+
+Type the number and press Enter:
+```
+Enter the number of the folder to compress: 2
+
+  ✔  Selected: builds
+  Calculating source size… 1.4 GB
+```
+
+**4. Watch real-time progress**
+
+The progress display updates live in your terminal:
+```
+  ████████████████░░░░░░░░░░░░░░░░░░░   62%  elapsed 0m 08s  178.4 MB/s  files: 312
+  ↳ builds/release/v2.1.0/installer.exe
+```
+
+| Element | Description |
+|---------|-------------|
+| `████░░░` | Progress bar filling left to right |
+| `62%` | Percentage of files processed |
+| `elapsed 0m 08s` | Time since compression started |
+| `178.4 MB/s` | Rolling average throughput speed |
+| `files: 312` | Number of files added so far |
+| `↳ filename` | The file currently being processed |
+
+**5. Completion summary**
+```
+  ✅  Archive created successfully!
+     Path     : /home/user/projects/builds.7z
+     Source   : 1.4 GB
+     Archive  : 1.4 GB
+     Time     : 0m 09s
+     Avg speed: 159.2 MB/s
+```
+
+The `.7z` archive is saved in the **same parent directory** as the folder you selected.
+
+---
+
+## Compression settings
+
+The script uses the following 7-Zip flags:
+
+| Flag | Value | Meaning |
+|------|-------|---------|
+| `-t7z` | — | Output format: 7z |
+| `-mx=0` | 0 | Compression level 0 = **store** (no compression) |
+| `-ms=off` | off | Solid archive **disabled** (faster for many files) |
+| `-bsp1` | — | Stream progress output to stdout (enables live display) |
+
+**Why no compression?**  
+Store mode (`-mx=0`) copies files into the archive as-is without compressing them. This is ideal when:
+- Speed matters more than file size reduction
+- The contents are already compressed (videos, images, zip files, etc.)
+- You want to bundle files for transfer without the CPU cost of compression
+
+---
+
+## How the real-time progress works
+
+7-Zip does not write progress on separate lines — instead it continuously overwrites the same terminal line using special control characters. The exact character it uses depends on the platform:
+
+| Platform | Character used | Code |
+|----------|---------------|------|
+| Linux / macOS | Backspace | `\x08` |
+| Windows | Carriage return | `\r` |
+
+The script reads 7-Zip's output as a raw binary stream and splits on **both** characters, so progress is captured correctly on every platform. The percentage, file count, and current filename are extracted from each segment using a regex and rendered live into two reserved terminal lines that update in place.
+
+---
+
+## Output location
+
+The archive is always created in the **same directory that contains the selected folder**.
+
+Example:
+```
+/home/user/projects/          ← scanned directory
+    builds/                   ← selected folder
+    builds.7z                 ← archive created here
+```
+
+If an archive with the same name already exists, 7-Zip will update it (adding/replacing files). Delete the existing `.7z` first if you want a clean archive.
+
+---
+
+## Troubleshooting
+
+**`7-Zip not found` error**
+- Ensure 7-Zip is installed (see Requirements above)
+- Confirm `7z` is on your PATH: run `which 7z` (Linux/macOS) or `where 7z` (Windows)
+- On Windows, try re-installing 7-Zip and ticking the "Add to PATH" option, or place `7z.exe` in `C:\Program Files\7-Zip\` which the script checks automatically
+
+**Progress bar stays at 0% / no stats shown**
+- This was a known bug that has been fixed. Make sure you are using the latest version of the script.
+- The root cause was that Windows 7-Zip uses `\r` to update progress lines while Linux/macOS uses `\x08` (backspace). The old version only handled backspaces, so on Windows the progress stream was never parsed. The current version handles both.
+- If you still see 0% after updating, confirm your 7-Zip version is 15.06 or newer: run `7z i` and check the version line at the top.
+
+**No progress bar / garbled output**
+- The live progress display requires a terminal that supports ANSI escape codes
+- On older Windows CMD, switch to Windows Terminal or PowerShell
+- Progress and stats are still printed even if color/ANSI is not supported
+
+**`SyntaxError` on startup**
+- Your Python version is below 3.10 — upgrade to Python 3.10+
+
+**Permission denied on folder**
+- Run the script with elevated permissions (`sudo` on Linux/macOS, Run as Administrator on Windows)
+- Or select a folder you have read access to
+
+---
+
+## Examples
+
+```bash
+# Compress a folder in the current directory (interactive)
+python compress_folder.py
+
+# Compress a folder inside a specific path
+python compress_folder.py /mnt/data/backups
+
+# Windows example
+python compress_folder.py "C:\Users\Alice\Desktop"
+```
+
+---
+
+## License
+
+This script is provided as-is for personal and commercial use. No warranty is expressed or implied.
diff --git a/old_01/compress_folder.py b/old_01/compress_folder.py
new file mode 100644
index 0000000..5414c80
--- /dev/null
+++ b/old_01/compress_folder.py
@@ -0,0 +1,329 @@
+#!/usr/bin/env python3
+"""
+Folder Compressor using 7-Zip
+Lists available folders, lets you select one, and compresses it
+using 7-Zip with no compression (store) at fastest speed.
+Real-time progress bar shown during compression.
+"""
+
+import os
+import re
+import sys
+import shutil
+import subprocess
+import time
+from pathlib import Path
+
+
+# ── Terminal color helpers ────────────────────────────────────────────────────
+
+SUPPORTS_COLOR = (
+    sys.stdout.isatty()
+    and (sys.platform != "win32" or os.environ.get("WT_SESSION") or os.environ.get("TERM"))
+)
+
+def _c(code: str, text: str) -> str:
+    return f"\033[{code}m{text}\033[0m" if SUPPORTS_COLOR else text
+
+def green(t):  return _c("32", t)
+def yellow(t): return _c("33", t)
+def cyan(t):   return _c("36", t)
+def bold(t):   return _c("1",  t)
+def dim(t):    return _c("2",  t)
+def red(t):    return _c("31", t)
+
+
+# ── Size / time formatters ────────────────────────────────────────────────────
+
+def fmt_size(b: float) -> str:
+    for unit in ("B", "KB", "MB", "GB", "TB"):
+        if b < 1024:
+            return f"{b:.1f} {unit}"
+        b /= 1024
+    return f"{b:.1f} PB"
+
+
+def fmt_time(seconds: float) -> str:
+    s = int(seconds)
+    if s < 60:
+        return f"{s}s"
+    m, s = divmod(s, 60)
+    if m < 60:
+        return f"{m}m {s:02d}s"
+    h, m = divmod(m, 60)
+    return f"{h}h {m:02d}m {s:02d}s"
+
+
+# ── Folder size calculator ────────────────────────────────────────────────────
+
+def folder_size(path: Path) -> int:
+    total = 0
+    for root, _, files in os.walk(path):
+        for f in files:
+            try:
+                total += os.path.getsize(os.path.join(root, f))
+            except OSError:
+                pass
+    return total
+
+
+# ── 7-Zip locator ─────────────────────────────────────────────────────────────
+
+def find_7zip() -> str | None:
+    for name in ("7z", "7za", "7zz", "7zip"):
+        path = shutil.which(name)
+        if path:
+            return path
+    if sys.platform == "win32":
+        for p in (
+            r"C:\Program Files\7-Zip\7z.exe",
+            r"C:\Program Files (x86)\7-Zip\7z.exe",
+        ):
+            if os.path.isfile(p):
+                return p
+    return None
+
+
+# ── Folder listing / selection ────────────────────────────────────────────────
+
+def list_folders(base_dir: str) -> list[Path]:
+    base = Path(base_dir)
+    return sorted(
+        (e for e in base.iterdir() if e.is_dir()),
+        key=lambda p: p.name.lower(),
+    )
+
+
+def prompt_folder_selection(folders: list[Path]) -> Path:
+    print("\nAvailable folders:\n")
+    for i, folder in enumerate(folders, start=1):
+        try:
+            sz = folder_size(folder)
+            size_label = dim(f"  ({fmt_size(sz)})")
+        except PermissionError:
+            size_label = dim("  (no access)")
+        print(f"  {dim(f'[{i:>3}]')}  {folder.name}{size_label}")
+
+    print()
+    while True:
+        try:
+            raw = input("Enter the number of the folder to compress: ").strip()
+            idx = int(raw)
+            if 1 <= idx <= len(folders):
+                return folders[idx - 1]
+            print(f"  Please enter a number between 1 and {len(folders)}.")
+        except ValueError:
+            print("  Invalid input — please enter a number.")
+        except (EOFError, KeyboardInterrupt):
+            print("\nAborted.")
+            sys.exit(0)
+
+
+# ── Progress bar renderer ─────────────────────────────────────────────────────
+
+BAR_WIDTH = 36
+
+# Matches 7-Zip progress segments like "47% 3 + path/to/file.bin"
+# or just "47%" when no file is on the same segment
+_PROGRESS_RE = re.compile(r"(\d{1,3})%(?:\s+(\d+)\s*\+?\s*(.*))?")
+
+# Split on ANY run of backspaces (\x08) or carriage returns (\r).
+# - Linux/macOS 7-Zip uses \x08 to erase and rewrite the progress line
+# - Windows 7-Zip uses \r to overwrite the progress line
+# Both need to be handled so the script works cross-platform.
+_SPLIT_RE = re.compile(rb"[\x08\r]+")
+
+
+def _move_up(n: int):
+    if SUPPORTS_COLOR:
+        sys.stdout.write(f"\033[{n}A")
+
+
+def _clear_line():
+    if SUPPORTS_COLOR:
+        sys.stdout.write("\033[2K\r")
+    else:
+        sys.stdout.write("\r" + " " * 78 + "\r")
+
+
+def _redraw(pct: int, elapsed: float, files_done: int,
+            current_file: str, speed_bps: float):
+    """Overwrite the two reserved progress lines in-place."""
+    filled  = int(BAR_WIDTH * pct / 100)
+    bar     = "█" * filled + "░" * (BAR_WIDTH - filled)
+    color   = green if pct == 100 else cyan
+    speed_s = f"{fmt_size(speed_bps)}/s" if speed_bps > 0 else "─"
+
+    _move_up(2)
+
+    # Line 1 — bar + stats
+    _clear_line()
+    sys.stdout.write(
+        f"  {color(bar)}  {bold(f'{pct:>3}%')}"
+        f"  {dim('elapsed')} {dim(fmt_time(elapsed))}"
+        f"  {yellow(speed_s)}"
+        f"  {dim(f'files: {files_done}')}\n"
+    )
+
+    # Line 2 — current file
+    _clear_line()
+    label = current_file.strip() or "starting…"
+    if len(label) > 60:
+        label = "…" + label[-59:]
+    sys.stdout.write(f"  {dim('↳ ' + label)}\n")
+
+    sys.stdout.flush()
+
+
+# ── Compression with real-time progress ───────────────────────────────────────
+
+def compress_folder(seven_zip: str, folder: Path, output_dir: Path) -> Path:
+    archive_path = output_dir / (folder.name + ".7z")
+
+    print(f"\n  {dim('Calculating source size…')} ", end="", flush=True)
+    src_size = folder_size(folder)
+    print(fmt_size(src_size))
+
+    cmd = [
+        seven_zip,
+        "a",
+        "-t7z",
+        "-mx=0",   # store – no compression
+        "-ms=off", # no solid archive
+        "-bsp1",   # stream progress to stdout
+        str(archive_path),
+        str(folder),
+    ]
+
+    print(f"\n  {dim('Command: ' + ' '.join(cmd))}")
+    print()
+    print("  " + "─" * 64)
+
+    # Reserve two blank lines for the live display
+    print()
+    print()
+
+    start_time   = time.monotonic()
+    last_pct     = 0
+    files_done   = 0
+    current_file = ""
+    speed_bps    = 0.0
+    last_bytes   = 0.0
+    speed_ts     = start_time
+
+    proc = subprocess.Popen(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        # Raw binary — we parse bytes ourselves to handle \x08 and \r
+    )
+
+    buf = b""
+
+    while True:
+        chunk = proc.stdout.read(256)
+        if not chunk:
+            break
+
+        buf   += chunk
+        elapsed = time.monotonic() - start_time
+
+        # Split on runs of \x08 (Linux/macOS) or \r (Windows).
+        # Each segment between separators is one "visible write" from 7-Zip.
+        segments = _SPLIT_RE.split(buf)
+
+        # Keep the last (potentially incomplete) segment for the next iteration
+        buf = segments[-1]
+
+        for seg in segments[:-1]:
+            text = seg.decode("utf-8", errors="replace").strip()
+            if not text:
+                continue
+
+            m = _PROGRESS_RE.search(text)
+            if m:
+                pct        = min(int(m.group(1)), 100)
+                files_done = int(m.group(2)) if m.group(2) else files_done
+                fname      = (m.group(3) or "").strip()
+                if fname:
+                    current_file = fname
+
+                # Rolling speed estimate (recalculate every 0.4 s)
+                if src_size > 0 and pct > 0:
+                    bytes_done = src_size * pct / 100
+                    now        = time.monotonic()
+                    dt         = now - speed_ts
+                    if dt >= 0.4:
+                        speed_bps  = (bytes_done - last_bytes) / dt
+                        last_bytes = bytes_done
+                        speed_ts   = now
+
+                last_pct = pct
+                _redraw(pct, elapsed, files_done, current_file, speed_bps)
+
+    proc.wait()
+    elapsed_total = time.monotonic() - start_time
+
+    # Lock bar at 100% on success
+    if proc.returncode == 0:
+        _redraw(100, elapsed_total, files_done, current_file, speed_bps)
+
+    print()
+    print("  " + "─" * 64)
+
+    if proc.returncode == 0:
+        arc_size  = archive_path.stat().st_size
+        avg_speed = src_size / elapsed_total if elapsed_total > 0 else 0
+
+        print(f"\n  {green('✅  Archive created successfully!')}")
+        print(f"     {bold('Path')}     : {archive_path}")
+        print(f"     {bold('Source')}   : {fmt_size(src_size)}")
+        print(f"     {bold('Archive')}  : {fmt_size(arc_size)}")
+        print(f"     {bold('Time')}     : {fmt_time(elapsed_total)}")
+        print(f"     {bold('Avg speed')}: {fmt_size(avg_speed)}/s")
+    else:
+        print(f"\n  {red(f'❌  7-Zip exited with code {proc.returncode}.')}")
+        sys.exit(proc.returncode)
+
+    return archive_path
+
+
+# ── Entry point ───────────────────────────────────────────────────────────────
+
+def main():
+    scan_dir = os.path.abspath(sys.argv[1] if len(sys.argv) > 1 else os.getcwd())
+
+    if not os.path.isdir(scan_dir):
+        print(f"Error: '{scan_dir}' is not a valid directory.")
+        sys.exit(1)
+
+    print(f"\n{bold('📦  Folder Compressor')}")
+    print(f"    Scanning: {cyan(scan_dir)}\n")
+
+    seven_zip = find_7zip()
+    if not seven_zip:
+        print(
+            f"\n{red('❌  7-Zip not found.')}\n"
+            "    Install it and make sure '7z' (or '7za') is on your PATH.\n"
+            "    • Linux  : sudo apt install p7zip-full\n"
+            "    • macOS  : brew install p7zip\n"
+            "    • Windows: https://www.7-zip.org/download.html"
+        )
+        sys.exit(1)
+
+    print(f"  {green('✔')}  7-Zip: {dim(seven_zip)}")
+
+    folders = list_folders(scan_dir)
+    if not folders:
+        print(f"\nNo sub-folders found in '{scan_dir}'.")
+        sys.exit(0)
+
+    chosen = prompt_folder_selection(folders)
+    print(f"\n  {green('✔')}  Selected: {bold(chosen.name)}")
+
+    compress_folder(seven_zip, chosen, chosen.parent)
+    print()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/old_02/README.md b/old_02/README.md
new file mode 100644
index 0000000..e4103c1
--- /dev/null
+++ b/old_02/README.md
@@ -0,0 +1,316 @@
+# 📦 Folder Compressor
+
+A command-line Python script that lets you pick any sub-folder to compress, or compress **all folders in one go** — each one individually with its own live progress bar. Uses **7-Zip store mode** (no compression) for maximum speed and zero CPU overhead.
+
+---
+
+## Features
+
+- Browse all sub-folders with their sizes before choosing
+- **Two modes at runtime:**
+  - **Single folder** — select one folder by number
+  - **Compress all** — process every folder sequentially, one by one
+- Real-time progress bar per job showing:
+  - Percentage complete
+  - Elapsed time
+  - Live transfer speed (MB/s)
+  - File count
+  - Currently processing file name
+- Pause between jobs in batch mode so you can read each result before continuing
+- Batch summary table at the end showing all jobs, sizes, times, and speeds
+- Color-coded terminal output (auto-disabled if not supported)
+- Cross-platform: Windows, macOS, Linux
+
+---
+
+## Requirements
+
+### Python
+Version **3.10 or higher** is required (uses `str | None` union type syntax).
+
+Check your version:
+```bash
+python --version
+# or
+python3 --version
+```
+
+No third-party packages are needed — only Python's standard library is used.
+
+### 7-Zip
+7-Zip must be installed and accessible on your system PATH.
+
+| Platform | Install command |
+|----------|----------------|
+| **Linux** (Debian/Ubuntu) | `sudo apt install p7zip-full` |
+| **Linux** (Fedora/RHEL) | `sudo dnf install p7zip p7zip-plugins` |
+| **macOS** (Homebrew) | `brew install p7zip` |
+| **macOS** (MacPorts) | `sudo port install p7zip` |
+| **Windows** | Download installer from [https://www.7-zip.org/download.html](https://www.7-zip.org/download.html) |
+
+> **Windows note:** After installing, make sure `C:\Program Files\7-Zip\` is added to your system PATH, or the script will auto-detect it from the default install location automatically.
+
+> **Minimum version:** 7-Zip **15.06 or newer** is required for the `-bsp1` progress flag used for real-time output. Most current installs will meet this requirement.
+
+Verify 7-Zip is available:
+```bash
+7z i
+```
+
+---
+
+## Installation
+
+No installation needed. Just download the script:
+
+```bash
+# Download compress_folder.py to any directory, then run it directly with Python
+```
+
+Optionally make it executable on Linux/macOS:
+```bash
+chmod +x compress_folder.py
+```
+
+---
+
+## Usage
+
+### Basic — scan the current directory
+```bash
+python compress_folder.py
+```
+
+### Specify a directory to scan
+```bash
+python compress_folder.py /path/to/directory
+```
+
+### On Linux/macOS (if made executable)
+```bash
+./compress_folder.py
+./compress_folder.py /path/to/directory
+```
+
+### On Windows
+```bash
+python compress_folder.py
+python compress_folder.py C:\Users\YourName\Documents
+```
+
+---
+
+## Step-by-step walkthrough
+
+### Step 1 — Launch the script
+
+```
+📦  Folder Compressor
+    Scanning: /home/user/projects
+```
+
+### Step 2 — Browse folders and choose a mode
+
+All sub-folders are listed with their sizes, followed by the option to compress all:
+
+```
+Available folders:
+
+  [  1]  archive  (240.0 MB)
+  [  2]  builds   (1.4 GB)
+  [  3]  logs     (88.3 MB)
+  [  4]  source   (320.5 MB)
+
+  [  A]  Compress ALL folders one by one
+
+Enter a folder number or  A  to compress all:
+```
+
+**To compress a single folder:** type its number and press Enter.  
+**To compress all folders:** type `A` and press Enter.
+
+---
+
+### Single folder mode
+
+```
+Enter a folder number or  A  to compress all: 2
+
+  ✔  Mode: Single folder  →  builds
+  Calculating source size… 1.4 GB
+
+  ────────────────────────────────────────────────────────────────
+
+  ████████████████░░░░░░░░░░░░░░░░░░░   62%  elapsed 0m 08s  178.4 MB/s  files: 312
+  ↳ builds/release/v2.1.0/installer.exe
+
+  ────────────────────────────────────────────────────────────────
+
+  ✅  Archive created successfully!
+     Path     : /home/user/projects/builds.7z
+     Source   : 1.4 GB
+     Archive  : 1.4 GB
+     Time     : 0m 09s
+     Avg speed: 159.2 MB/s
+```
+
+---
+
+### Compress all mode
+
+Each folder gets a numbered job header and its own progress bar. After each job finishes, the script pauses and waits for you to press Enter before starting the next one:
+
+```
+Enter a folder number or  A  to compress all: A
+
+  ✔  Mode: Compress all folders sequentially
+
+
+  [1/4]  archive  ────────────────────────────────────────────
+
+  Calculating source size… 240.0 MB
+  ...
+  ✅  Archive created successfully!  (240.0 MB · 1s · 240.0 MB/s)
+
+  Press Enter to continue to the next folder…
+
+
+  [2/4]  builds  ─────────────────────────────────────────────
+
+  ...
+```
+
+After all jobs complete, a **batch summary** is printed:
+
+```
+  ══════════════════════════════════════════════════════════════════
+  BATCH SUMMARY  —  4 folder(s) processed
+  ══════════════════════════════════════════════════════════════════
+  ✅  archive        240.0 MB  →  1s   @  240.0 MB/s
+  ✅  builds           1.4 GB  →  9s   @  159.2 MB/s
+  ✅  logs            88.3 MB  →  0s   @  310.5 MB/s
+  ✅  source         320.5 MB  →  2s   @  192.1 MB/s
+  ──────────────────────────────────────────────────────────────────
+  Total source size : 2.0 GB
+  Total archive size: 2.0 GB
+  Total time        : 12s
+  Overall avg speed : 170.4 MB/s
+  ══════════════════════════════════════════════════════════════════
+```
+
+If any jobs fail, they are flagged in the summary with their error code.
+
+---
+
+## Progress bar reference
+
+| Element | Description |
+|---------|-------------|
+| `████░░░` | Progress bar filling left to right |
+| `62%` | Percentage of data processed |
+| `elapsed 0m 08s` | Time since this job started |
+| `178.4 MB/s` | Rolling average throughput speed |
+| `files: 312` | Number of files added so far |
+| `↳ filename` | The file currently being processed |
+
+---
+
+## Compression settings
+
+The script uses the following 7-Zip flags:
+
+| Flag | Value | Meaning |
+|------|-------|---------|
+| `-t7z` | — | Output format: 7z |
+| `-mx=0` | 0 | Compression level 0 = **store** (no compression) |
+| `-ms=off` | off | Solid archive **disabled** (faster for many files) |
+| `-bsp1` | — | Stream progress output to stdout (enables live display) |
+
+**Why no compression?**  
+Store mode (`-mx=0`) copies files into the archive as-is without compressing them. This is ideal when:
+- Speed matters more than file size reduction
+- The contents are already compressed (videos, images, zip files, etc.)
+- You want to bundle files for transfer without the CPU cost of compression
+
+---
+
+## How the real-time progress works
+
+7-Zip does not write progress on separate lines — instead it continuously overwrites the same terminal line using special control characters. The exact character it uses depends on the platform:
+
+| Platform | Character used | Code |
+|----------|---------------|------|
+| Linux / macOS | Backspace | `\x08` |
+| Windows | Carriage return | `\r` |
+
+The script reads 7-Zip's output as a raw binary stream and splits on **both** characters, so progress is captured correctly on every platform. The percentage, file count, and current filename are extracted from each segment using a regex and rendered live into two reserved terminal lines that update in place.
+
+---
+
+## Output location
+
+Each archive is created in the **same directory that contains the source folder**.
+
+Example:
+```
+/home/user/projects/          ← scanned directory
+    archive/                  ← source folder
+    archive.7z                ← archive created here
+    builds/
+    builds.7z
+```
+
+If an archive with the same name already exists, 7-Zip will update it (adding/replacing files). Delete the existing `.7z` first if you want a clean archive.
+
+---
+
+## Interrupting a batch
+
+Press `Ctrl+C` at any "Press Enter to continue" prompt to stop the batch early. Any jobs already completed will have their archives saved. A partial batch summary will be printed for the jobs that ran.
+
+---
+
+## Troubleshooting
+
+**`7-Zip not found` error**
+- Ensure 7-Zip is installed (see Requirements above)
+- Confirm `7z` is on your PATH: run `which 7z` (Linux/macOS) or `where 7z` (Windows)
+- On Windows, try re-installing 7-Zip and ticking the "Add to PATH" option, or place `7z.exe` in `C:\Program Files\7-Zip\` which the script checks automatically
+
+**Progress bar stays at 0% / no stats shown**
+- Make sure you are using the latest version of the script
+- The root cause of this bug was that Windows 7-Zip uses `\r` to update progress lines while Linux/macOS uses `\x08` (backspace). The current version handles both
+- If you still see 0% after updating, confirm your 7-Zip version is 15.06 or newer: run `7z i` and check the version line at the top
+
+**No progress bar / garbled output**
+- The live progress display requires a terminal that supports ANSI escape codes
+- On older Windows CMD, switch to Windows Terminal or PowerShell
+- Progress and stats are still printed even if color/ANSI is not supported
+
+**`SyntaxError` on startup**
+- Your Python version is below 3.10 — upgrade to Python 3.10+
+
+**Permission denied on folder**
+- Run the script with elevated permissions (`sudo` on Linux/macOS, Run as Administrator on Windows)
+- Or select a folder you have read access to
+
+---
+
+## Examples
+
+```bash
+# Compress a single folder or all folders in the current directory
+python compress_folder.py
+
+# Compress a single folder or all folders inside a specific path
+python compress_folder.py /mnt/data/backups
+
+# Windows example
+python compress_folder.py "C:\Users\Alice\Desktop"
+```
+
+---
+
+## License
+
+This script is provided as-is for personal and commercial use. No warranty is expressed or implied.
diff --git a/old_02/compress_folder.py b/old_02/compress_folder.py
new file mode 100644
index 0000000..cce0a89
--- /dev/null
+++ b/old_02/compress_folder.py
@@ -0,0 +1,428 @@
+#!/usr/bin/env python3
+"""
+Folder Compressor using 7-Zip
+- Select a single folder to compress, OR
+- Compress all folders one by one automatically
+Uses 7-Zip store mode (no compression) for maximum speed.
+Real-time progress bar shown during each compression job.
+"""
+
+import os
+import re
+import sys
+import shutil
+import subprocess
+import time
+from pathlib import Path
+from dataclasses import dataclass
+
+
+# ── Terminal color helpers ────────────────────────────────────────────────────
+
+SUPPORTS_COLOR = (
+    sys.stdout.isatty()
+    and (sys.platform != "win32" or os.environ.get("WT_SESSION") or os.environ.get("TERM"))
+)
+
+def _c(code: str, text: str) -> str:
+    return f"\033[{code}m{text}\033[0m" if SUPPORTS_COLOR else text
+
+def green(t):   return _c("32", t)
+def yellow(t):  return _c("33", t)
+def cyan(t):    return _c("36", t)
+def bold(t):    return _c("1",  t)
+def dim(t):     return _c("2",  t)
+def red(t):     return _c("31", t)
+def magenta(t): return _c("35", t)
+
+
+# ── Size / time formatters ────────────────────────────────────────────────────
+
+def fmt_size(b: float) -> str:
+    for unit in ("B", "KB", "MB", "GB", "TB"):
+        if b < 1024:
+            return f"{b:.1f} {unit}"
+        b /= 1024
+    return f"{b:.1f} PB"
+
+
+def fmt_time(seconds: float) -> str:
+    s = int(seconds)
+    if s < 60:
+        return f"{s}s"
+    m, s = divmod(s, 60)
+    if m < 60:
+        return f"{m}m {s:02d}s"
+    h, m = divmod(m, 60)
+    return f"{h}h {m:02d}m {s:02d}s"
+
+
+# ── Folder size calculator ────────────────────────────────────────────────────
+
+def folder_size(path: Path) -> int:
+    total = 0
+    for root, _, files in os.walk(path):
+        for f in files:
+            try:
+                total += os.path.getsize(os.path.join(root, f))
+            except OSError:
+                pass
+    return total
+
+
+# ── 7-Zip locator ─────────────────────────────────────────────────────────────
+
+def find_7zip() -> str | None:
+    for name in ("7z", "7za", "7zz", "7zip"):
+        path = shutil.which(name)
+        if path:
+            return path
+    if sys.platform == "win32":
+        for p in (
+            r"C:\Program Files\7-Zip\7z.exe",
+            r"C:\Program Files (x86)\7-Zip\7z.exe",
+        ):
+            if os.path.isfile(p):
+                return p
+    return None
+
+
+# ── Folder listing ────────────────────────────────────────────────────────────
+
+def list_folders(base_dir: str) -> list[Path]:
+    base = Path(base_dir)
+    return sorted(
+        (e for e in base.iterdir() if e.is_dir()),
+        key=lambda p: p.name.lower(),
+    )
+
+
+# ── Mode + folder selection menu ─────────────────────────────────────────────
+
+def prompt_mode_and_selection(folders: list[Path]) -> list[Path]:
+    """
+    Print the folder list then ask the user what to do:
+      A  — compress ALL folders sequentially
+      1…N — compress a single specific folder
+    Returns the list of folders to compress (one or all).
+    """
+    print("\nAvailable folders:\n")
+    for i, folder in enumerate(folders, start=1):
+        try:
+            sz = folder_size(folder)
+            size_label = dim(f"  ({fmt_size(sz)})")
+        except PermissionError:
+            size_label = dim("  (no access)")
+        print(f"  {dim(f'[{i:>3}]')}  {folder.name}{size_label}")
+
+    print()
+    print(f"  {dim('[  A]')}  {bold('Compress ALL folders one by one')}")
+    print()
+
+    while True:
+        try:
+            raw = input("Enter a folder number or  A  to compress all: ").strip().upper()
+
+            if raw == "A":
+                print(f"\n  {green('✔')}  Mode: {bold('Compress all folders sequentially')}")
+                return list(folders)
+
+            idx = int(raw)
+            if 1 <= idx <= len(folders):
+                chosen = folders[idx - 1]
+                print(f"\n  {green('✔')}  Mode: {bold('Single folder')}  →  {chosen.name}")
+                return [chosen]
+
+            print(f"  Please enter a number between 1 and {len(folders)}, or A.")
+
+        except ValueError:
+            print("  Invalid input — enter a number or A.")
+        except (EOFError, KeyboardInterrupt):
+            print("\nAborted.")
+            sys.exit(0)
+
+
+# ── Progress bar renderer ─────────────────────────────────────────────────────
+
+BAR_WIDTH = 36
+
+_PROGRESS_RE = re.compile(r"(\d{1,3})%(?:\s+(\d+)\s*\+?\s*(.*))?")
+
+# Split on backspaces (\x08, Linux/macOS) or carriage returns (\r, Windows)
+_SPLIT_RE = re.compile(rb"[\x08\r]+")
+
+
+def _move_up(n: int):
+    if SUPPORTS_COLOR:
+        sys.stdout.write(f"\033[{n}A")
+
+
+def _clear_line():
+    if SUPPORTS_COLOR:
+        sys.stdout.write("\033[2K\r")
+    else:
+        sys.stdout.write("\r" + " " * 78 + "\r")
+
+
+def _redraw(pct: int, elapsed: float, files_done: int,
+            current_file: str, speed_bps: float):
+    filled  = int(BAR_WIDTH * pct / 100)
+    bar     = "█" * filled + "░" * (BAR_WIDTH - filled)
+    color   = green if pct == 100 else cyan
+    speed_s = f"{fmt_size(speed_bps)}/s" if speed_bps > 0 else "─"
+
+    _move_up(2)
+
+    _clear_line()
+    sys.stdout.write(
+        f"  {color(bar)}  {bold(f'{pct:>3}%')}"
+        f"  {dim('elapsed')} {dim(fmt_time(elapsed))}"
+        f"  {yellow(speed_s)}"
+        f"  {dim(f'files: {files_done}')}\n"
+    )
+
+    _clear_line()
+    label = current_file.strip() or "starting…"
+    if len(label) > 60:
+        label = "…" + label[-59:]
+    sys.stdout.write(f"  {dim('↳ ' + label)}\n")
+
+    sys.stdout.flush()
+
+
+# ── Result record ─────────────────────────────────────────────────────────────
+
+@dataclass
+class JobResult:
+    folder:      Path
+    archive:     Path | None
+    src_size:    int
+    arc_size:    int
+    elapsed:     float
+    avg_speed:   float
+    success:     bool
+    error:       str = ""
+
+
+# ── Single compression job ────────────────────────────────────────────────────
+
+def compress_folder(seven_zip: str, folder: Path, output_dir: Path,
+                    job_label: str = "") -> JobResult:
+    archive_path = output_dir / (folder.name + ".7z")
+
+    if job_label:
+        print(f"\n{job_label}")
+
+    print(f"\n  {dim('Calculating source size…')} ", end="", flush=True)
+    src_size = folder_size(folder)
+    print(fmt_size(src_size))
+
+    cmd = [
+        seven_zip,
+        "a",
+        "-t7z",
+        "-mx=0",
+        "-ms=off",
+        "-bsp1",
+        str(archive_path),
+        str(folder),
+    ]
+
+    print(f"\n  {dim('Command: ' + ' '.join(cmd))}")
+    print()
+    print("  " + "─" * 64)
+    print()
+    print()
+
+    start_time   = time.monotonic()
+    files_done   = 0
+    current_file = ""
+    speed_bps    = 0.0
+    last_bytes   = 0.0
+    speed_ts     = start_time
+
+    proc = subprocess.Popen(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+    )
+
+    buf = b""
+
+    while True:
+        chunk = proc.stdout.read(256)
+        if not chunk:
+            break
+
+        buf    += chunk
+        elapsed = time.monotonic() - start_time
+        segments = _SPLIT_RE.split(buf)
+        buf = segments[-1]
+
+        for seg in segments[:-1]:
+            text = seg.decode("utf-8", errors="replace").strip()
+            if not text:
+                continue
+
+            m = _PROGRESS_RE.search(text)
+            if m:
+                pct        = min(int(m.group(1)), 100)
+                files_done = int(m.group(2)) if m.group(2) else files_done
+                fname      = (m.group(3) or "").strip()
+                if fname:
+                    current_file = fname
+
+                if src_size > 0 and pct > 0:
+                    bytes_done = src_size * pct / 100
+                    now        = time.monotonic()
+                    dt         = now - speed_ts
+                    if dt >= 0.4:
+                        speed_bps  = (bytes_done - last_bytes) / dt
+                        last_bytes = bytes_done
+                        speed_ts   = now
+
+                _redraw(pct, elapsed, files_done, current_file, speed_bps)
+
+    proc.wait()
+    elapsed_total = time.monotonic() - start_time
+
+    if proc.returncode == 0:
+        _redraw(100, elapsed_total, files_done, current_file, speed_bps)
+
+    print()
+    print("  " + "─" * 64)
+
+    if proc.returncode == 0:
+        arc_size  = archive_path.stat().st_size
+        avg_speed = src_size / elapsed_total if elapsed_total > 0 else 0
+
+        print(f"\n  {green('✅  Archive created successfully!')}")
+        print(f"     {bold('Path')}     : {archive_path}")
+        print(f"     {bold('Source')}   : {fmt_size(src_size)}")
+        print(f"     {bold('Archive')}  : {fmt_size(arc_size)}")
+        print(f"     {bold('Time')}     : {fmt_time(elapsed_total)}")
+        print(f"     {bold('Avg speed')}: {fmt_size(avg_speed)}/s")
+
+        return JobResult(
+            folder=folder, archive=archive_path,
+            src_size=src_size, arc_size=arc_size,
+            elapsed=elapsed_total, avg_speed=avg_speed,
+            success=True,
+        )
+    else:
+        msg = f"7-Zip exited with code {proc.returncode}"
+        print(f"\n  {red(f'❌  {msg}')}")
+        return JobResult(
+            folder=folder, archive=None,
+            src_size=src_size, arc_size=0,
+            elapsed=elapsed_total, avg_speed=0,
+            success=False, error=msg,
+        )
+
+
+# ── Batch summary ─────────────────────────────────────────────────────────────
+
+def print_batch_summary(results: list[JobResult]):
+    succeeded = [r for r in results if r.success]
+    failed    = [r for r in results if not r.success]
+    total_src = sum(r.src_size for r in results)
+    total_arc = sum(r.arc_size for r in results)
+    total_t   = sum(r.elapsed  for r in results)
+
+    width = 66
+    print()
+    print("  " + "═" * width)
+    print(f"  {bold('BATCH SUMMARY')}  —  {len(results)} folder(s) processed")
+    print("  " + "═" * width)
+
+    for r in results:
+        icon  = green("✅") if r.success else red("❌")
+        label = r.folder.name
+        if len(label) > 38:
+            label = label[:35] + "…"
+        if r.success:
+            detail = f"{fmt_size(r.src_size)}  →  {fmt_time(r.elapsed)}  @  {fmt_size(r.avg_speed)}/s"
+        else:
+            detail = red(r.error)
+        print(f"  {icon}  {label:<38}  {dim(detail)}")
+
+    print("  " + "─" * width)
+    print(f"  {bold('Total source size')} : {fmt_size(total_src)}")
+    print(f"  {bold('Total archive size')}: {fmt_size(total_arc)}")
+    print(f"  {bold('Total time')}        : {fmt_time(total_t)}")
+    if total_t > 0:
+        avg = total_src / total_t
+        print(f"  {bold('Overall avg speed')} : {fmt_size(avg)}/s")
+    if failed:
+        print()
+        print(f"  {red(f'⚠  {len(failed)} job(s) failed:')}")
+        for r in failed:
+            print(f"     • {r.folder.name}  —  {r.error}")
+    print("  " + "═" * width)
+    print()
+
+
+# ── Entry point ───────────────────────────────────────────────────────────────
+
+def main():
+    scan_dir = os.path.abspath(sys.argv[1] if len(sys.argv) > 1 else os.getcwd())
+
+    if not os.path.isdir(scan_dir):
+        print(f"Error: '{scan_dir}' is not a valid directory.")
+        sys.exit(1)
+
+    print(f"\n{bold('📦  Folder Compressor')}")
+    print(f"    Scanning: {cyan(scan_dir)}\n")
+
+    seven_zip = find_7zip()
+    if not seven_zip:
+        print(
+            f"\n{red('❌  7-Zip not found.')}\n"
+            "    Install it and make sure '7z' (or '7za') is on your PATH.\n"
+            "    • Linux  : sudo apt install p7zip-full\n"
+            "    • macOS  : brew install p7zip\n"
+            "    • Windows: https://www.7-zip.org/download.html"
+        )
+        sys.exit(1)
+
+    print(f"  {green('✔')}  7-Zip: {dim(seven_zip)}")
+
+    folders = list_folders(scan_dir)
+    if not folders:
+        print(f"\nNo sub-folders found in '{scan_dir}'.")
+        sys.exit(0)
+
+    targets = prompt_mode_and_selection(folders)
+
+    batch = len(targets) > 1
+    results: list[JobResult] = []
+
+    for i, folder in enumerate(targets, start=1):
+        label = ""
+        if batch:
+            label = (
+                f"\n  {magenta(f'[{i}/{len(targets)}]')}  "
+                f"{bold(folder.name)}"
+                f"  {dim('─' * max(0, 44 - len(folder.name)))}"
+            )
+
+        result = compress_folder(seven_zip, folder, folder.parent, job_label=label)
+        results.append(result)
+
+        # In batch mode, pause briefly between jobs so the user can read each result
+        if batch and i < len(targets):
+            print()
+            try:
+                input(f"  {dim('Press Enter to continue to the next folder…')}")
+            except (EOFError, KeyboardInterrupt):
+                print(f"\n  {yellow('⚠  Batch interrupted by user.')}")
+                break
+
+    if batch:
+        print_batch_summary(results)
+    else:
+        print()
+
+
+if __name__ == "__main__":
+    main()