Update Debian version to 13 (trixie) in documentation and script

CLAUDE.md

@@ -0,0 +1,100 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Debi is a Debian Network Reinstall Script that allows reinstalling any VPS or physical machine to minimal Debian via network boot. It's a single POSIX-compliant shell script that automates the entire Debian installation process.
+
+## Commands
+
+### Running the Script
+```bash
+# Basic execution (requires root)
+sudo ./debi.sh
+
+# With options
+sudo ./debi.sh --user debian --timezone UTC --cloudflare
+
+# Dry run (generate config without installing)
+sudo ./debi.sh --dry-run
+
+# With cloud-init configuration
+sudo ./debi.sh --cidata ./cidata-example/
+```
+
+### Testing Changes
+```bash
+# Check shell script syntax
+sh -n debi.sh
+
+# Run shellcheck for linting (if available)
+shellcheck debi.sh
+
+# Test in a VM environment (recommended)
+# No automated test suite exists - manual testing required
+```
+
+## Architecture
+
+The script operates in distinct phases:
+
+1. **Configuration Phase**: Parses command-line arguments and validates environment
+2. **Download Phase**: Fetches Debian installer components to `/boot/debian-$VERSION/`
+3. **Preseed Generation**: Creates automated installation configuration
+4. **GRUB Modification**: Adds installer entry to bootloader menu
+5. **Initramfs Injection**: Embeds preseed and network configuration into installer
+6. **Execution**: Updates GRUB and prepares for reboot
+
+Key architectural decisions:
+- Single-file design for easy distribution
+- POSIX compliance for maximum compatibility
+- No external dependencies beyond standard Linux utilities
+- Modular function design with clear separation of concerns
+- Extensive error handling with rollback capabilities
+
+## Key Functions and Their Purposes
+
+- `download()`: Handles file downloads with proxy support and multiple backend options (wget/curl/busybox)
+- `set_debian_version()` / `set_suite()`: Manages Debian version selection and mirror URLs
+- `configure_sshd()`: Sets up SSH access during installation for remote monitoring
+- `in_target()`: Executes commands within the target installation environment
+- `prompt_password()`: Securely handles password input with validation
+
+## Important Configuration Variables
+
+The script uses 80+ configuration options. Key ones include:
+- `$suite`: Debian version (bookworm, bullseye, etc.)
+- `$mirror_protocol` / `$mirror_host`: APT repository configuration
+- `$disk`: Target installation disk
+- `$authorized_keys_url`: SSH key provisioning
+- `$cidata`: Cloud-init configuration directory
+
+## Development Guidelines
+
+1. **Maintain POSIX compliance** - Script must work with dash/sh, not just bash
+2. **Test on real systems** - No test suite exists; changes require VM or physical testing
+3. **Preserve backward compatibility** - Many users rely on specific option behaviors
+4. **Document all options** - Update README.md for any new configuration options
+5. **Handle errors gracefully** - Always provide rollback paths for critical operations
+
+## Common Development Tasks
+
+### Adding New Configuration Options
+1. Add option to the case statement in the argument parsing section
+2. Define corresponding variable with sensible default
+3. Implement logic in appropriate phase function
+4. Update README.md documentation
+
+### Debugging Installation Issues
+1. Use `--dry-run` to generate and inspect preseed configuration
+2. Enable network console with `--ssh` for remote debugging
+3. Check `/boot/debian-$VERSION/` for downloaded components
+4. Review GRUB configuration changes in `/boot/grub/grub.cfg`
+
+### Testing Platform Compatibility
+Focus areas for testing:
+- Network configuration (static IP vs DHCP)
+- Disk detection and partitioning
+- GRUB installation and boot entries
+- Architecture-specific installer components

README.ja-JP.md

@@ -30,7 +30,7 @@ sudo ./debi.sh --user root
 sudo reboot
 ````
 
-**デフォルト設定:** Debian 12 (bookworm)、DHCPによるネットワーク設定、sudo権限を持つ`debian`ユーザーが作成され、パスワードの入力を求められます。
+**デフォルト設定:** Debian 13 (trixie)、DHCPによるネットワーク設定、sudo権限を持つ`debian`ユーザーが作成され、パスワードの入力を求められます。
 
 ## プラットフォームサポート
 
@@ -65,8 +65,8 @@ sudo reboot
 
 | オプション | デフォルト値 | 説明 |
 |---|---|---|
-| `--version 12` | `12` | Debianのバージョン: `10`, `11`, `12`, `13` |
+| `--version 13` | `13` | Debianのバージョン: `10`, `11`, `12`, `13`, `14` |
-| `--suite bookworm` | `bookworm` | Debianのスイート: `stable`, `testing`, `sid` など |
+| `--suite trixie` | `trixie` | Debianのスイート: `stable`, `testing`, `sid` など |
 | `--user debian` | `debian` | ユーザー名 (`root`を指定するとrootユーザーのみ) |
 | `--password PASSWORD` | *プロンプト* | ユーザーのパスワード（指定しない場合はプロンプト表示） |
 | `--authorized-keys-url URL` | *パスワード認証* | URLからSSH公開鍵を設定 (例: `https://github.com/user.keys`) |
@@ -267,7 +267,7 @@ sudo ./debi.sh --ip 192.168.1.100/24 --gateway 192.168.1.1 --cidata ./cloud-conf
 
 ```bash
 sudo ./debi.sh \
-  --version 12 \
+  --version 13 \
   --user admin \
   --timezone Europe/London \
   --disk /dev/nvme0n1 \

README.md

@@ -31,7 +31,7 @@ sudo ./debi.sh --user root
 sudo reboot
 ```
 
-**Default settings:** Debian 12 (bookworm), DHCP networking, user `debian` with sudo access, you'll be prompted for password.
+**Default settings:** Debian 13 (trixie), DHCP networking, user `debian` with sudo access, you'll be prompted for password.
 
 ## Platform Support
 
@@ -64,8 +64,8 @@ sudo reboot
 ### System & User Configuration
 | Option | Default | Description |
 |--------|---------|-------------|
-| `--version 12` | `12` | Debian version: `10`, `11`, `12`, `13` |
+| `--version 13` | `13` | Debian version: `10`, `11`, `12`, `13`, `14` |
-| `--suite bookworm` | `bookworm` | Debian suite: `stable`, `testing`, `sid`, etc. |
+| `--suite trixie` | `trixie` | Debian suite: `stable`, `testing`, `sid`, etc. |
 | `--user debian` | `debian` | Username (use `root` for root-only) |
 | `--password PASSWORD` | *prompt* | User password (prompted if not specified) |
 | `--authorized-keys-url URL` | *password auth* | SSH keys from URL (e.g., `https://github.com/user.keys`) |
@@ -245,7 +245,7 @@ sudo ./debi.sh --ip 192.168.1.100/24 --gateway 192.168.1.1 --cidata ./cloud-conf
 ### Advanced Custom Configuration
 ```bash
 sudo ./debi.sh \
-  --version 12 \
+  --version 13 \
   --user admin \
   --timezone Europe/London \
   --disk /dev/nvme0n1 \

README.zh-CN.md

@@ -31,7 +31,7 @@ sudo ./debi.sh --user root
 sudo reboot
 ```
 
-**默认设置：** Debian 12 (bookworm)，DHCP 网络，创建一个名为 `debian` 并拥有 sudo 权限的用户，脚本会提示你为该用户设置密码。
+**默认设置：** Debian 13 (trixie)，DHCP 网络，创建一个名为 `debian` 并拥有 sudo 权限的用户，脚本会提示你为该用户设置密码。
 
 ## 平台支持
 
@@ -66,8 +66,8 @@ sudo reboot
 
 | 选项 | 默认值 | 描述 |
 | :--- | :--- | :--- |
-| `--version 12` | `12` | Debian 版本：`10`, `11`, `12`, `13` |
+| `--version 13` | `13` | Debian 版本：`10`, `11`, `12`, `13`, `14` |
-| `--suite bookworm` | `bookworm` | Debian 发行代号：`stable`, `testing`, `sid` 等 |
+| `--suite trixie` | `trixie` | Debian 发行代号：`stable`, `testing`, `sid` 等 |
 | `--user debian` | `debian` | 用户名 (使用 `root` 则只创建 root 用户) |
 | `--password PASSWORD` | *交互式提示* | 用户密码 (如果未指定，则会提示输入) |
 | `--authorized-keys-url URL` | *密码认证* | 从 URL 加载 SSH 公钥 (例如 `https://github.com/user.keys`) |
@@ -269,7 +269,7 @@ sudo ./debi.sh --ip 192.168.1.100/24 --gateway 192.168.1.1 --cidata ./cloud-conf
 
 ```bash
 sudo ./debi.sh \
-  --version 12 \
+  --version 13 \
   --user admin \
   --timezone Europe/London \
   --disk /dev/nvme0n1 \

debi.sh

@@ -109,12 +109,16 @@ set_mirror_proxy() {
     esac
 }
 
+# Determines the security repository path format based on Debian suite
+# - Buster (Debian 10): Uses old format "buster/updates" 
+# - Bullseye onwards and testing: Uses new format "suite-security"
+# - Sid/unstable: No security repository (fixes go directly to unstable)
 set_security_archive() {
     case $suite in
-        buster|oldoldstable)
+        buster)
             security_archive="$suite/updates"
             ;;
-        bullseye|oldstable|bookworm|stable|trixie|testing)
+        bullseye|oldoldstable|bookworm|oldstable|trixie|stable|forky|testing)
             security_archive="$suite-security"
             ;;
         sid|unstable)
@@ -125,12 +129,16 @@ set_security_archive() {
     esac
 }
 
+# Determines whether to use daily or stable installer builds
+# - Stable/oldstable releases: Use stable installer builds (thoroughly tested)
+# - Testing/unstable: Use daily installer builds (latest changes, may be less stable)
+# Daily builds are necessary for testing/unstable as they need the latest kernel and packages
 set_daily_d_i() {
     case $suite in
-        buster|oldoldstable|bullseye|oldstable|bookworm|stable)
+        buster|bullseye|oldoldstable|bookworm|oldstable|trixie|stable)
             daily_d_i=false
             ;;
-        trixie|testing|sid|unstable)
+        forky|testing|sid|unstable)
             daily_d_i=true
             ;;
         *)
@@ -144,20 +152,32 @@ set_suite() {
     set_security_archive
 }
 
+# Maps version numbers and release aliases to actual suite names
+# Accepts: version number (10-14), suite name (buster, bullseye, etc.), or alias (stable, testing, etc.)
+# Current mapping:
+# - 10/buster: No longer supported as oldoldstable (archived)
+# - 11/bullseye/oldoldstable: LTS support
+# - 12/bookworm/oldstable: Previous stable
+# - 13/trixie/stable: Current stable release
+# - 14/forky/testing: Next release in development
+# - sid/unstable: Rolling development branch
 set_debian_version() {
     case $1 in
-        10|buster|oldoldstable)
+        10|buster)
             set_suite buster
             ;;
-        11|bullseye|oldstable)
+        11|bullseye|oldoldstable)
             set_suite bullseye
             ;;
-        12|bookworm|stable)
+        12|bookworm|oldstable)
             set_suite bookworm
             ;;
-        13|trixie|testing)
+        13|trixie|stable)
             set_suite trixie
             ;;
+        14|forky|testing)
+            set_suite forky
+            ;;
         sid|unstable)
             set_suite sid
             ;;
@@ -166,13 +186,19 @@ set_debian_version() {
     esac
 }
 
+# Checks if cloud-optimized kernels are available for the current architecture and suite
+# Cloud kernels are minimal kernels optimized for cloud/virtual environments
+# - Buster: Only amd64 has cloud kernel, arm64 requires backports
+# - Bullseye onwards: Both amd64 and arm64 have cloud kernels
+# - Other architectures (i386, etc.): No cloud kernels available
+# Returns 0 if available, 1 if not
 has_cloud_kernel() {
     case $suite in
-        buster|oldoldstable)
+        buster)
             [ "$architecture" = amd64 ] && return
             [ "$architecture" = arm64 ] && [ "$bpo_kernel" = true ] && return
             ;;
-        bullseye|oldstable|bookworm|stable|trixie|testing|sid|unstable)
+        bullseye|oldoldstable|bookworm|oldstable|trixie|stable|forky|testing|sid|unstable)
             [ "$architecture" = amd64 ] || [ "$architecture" = arm64 ] && return
     esac
 
@@ -182,9 +208,14 @@ has_cloud_kernel() {
     return 1
 }
 
+# Checks if backports repository is available for the current suite
+# Backports provide newer versions of packages from testing/unstable rebuilt for stable releases
+# - All stable releases and testing: Have backports available
+# - Sid/unstable: No backports (already has the latest packages)
+# Returns 0 if available, 1 if not
 has_backports() {
     case $suite in
-        buster|oldoldstable|bullseye|oldstable|bookworm|stable|trixie|testing) return
+        buster|bullseye|oldoldstable|bookworm|oldstable|trixie|stable|forky|testing) return
     esac
 
     warn "No backports kernel is available for $suite"
@@ -201,7 +232,7 @@ dns6='2606:4700:4700::1111 2606:4700:4700::1001'
 dns10='1.1.1.1 2606:4700:4700::1111'
 hostname=
 network_console=false
-set_debian_version 12
+set_debian_version 13
 mirror_protocol=https
 mirror_host=deb.debian.org
 mirror_directory=/debian
@@ -540,9 +571,14 @@ done
 [ -n "$authorized_keys_url" ] && ! download "$authorized_keys_url" /dev/null &&
 err "Failed to download SSH authorized public keys from \"$authorized_keys_url\""
 
+# Determines if the non-free-firmware repository component is available
+# Starting from Debian 12 (Bookworm), firmware was split into a separate component
+# to make it easier to include necessary firmware while keeping main free
+# - Bookworm onwards: non-free-firmware component available
+# - Bullseye and earlier: Firmware is in non-free component
 non_free_firmware_available=false
 case $suite in
-    bookworm|stable|trixie|testing|sid|unstable)
+    bookworm|oldstable|trixie|stable|forky|testing|sid|unstable)
         non_free_firmware_available=true
         ;;
     *)