feat: integrate builds into wizard

- Show saved builds at wizard start, allow selecting one
- Ask to save configuration as build at wizard end
- Update README with builds documentation
- Add builds to features list

Author: JheisonMB

README.md

@@ -37,6 +37,7 @@ Set up a git repo the way you actually work — one guided flow for hooks, `.git
 - **🧰 Hook management** — Install, list, show, or remove built-in hooks, or wire up your own command.
 - **🧩 Ignore and attribute presets** — Browse built-in and gitignore.io templates, then apply line-ending or binary presets.
 - **⚙️ Curated git config** — Apply practical presets with `--global` or `--local` scope, with idempotency detection.
+- **💾 Save & reuse builds** — Save configurations and apply them to any project with one command.
 - **📦 Single binary** — No Node.js, no Python, no extra runtime.
 
 ---
@@ -259,6 +260,30 @@ $ gitkit config apply defaults --global
 All configs already applied.
 ```
 
+### Build
+
+Save and reuse configurations across projects.
+
+| Command | Description |
+|---|---|
+| `gitkit build list` | List saved builds |
+| `gitkit build save <name>` | Save current repo config as a build |
+| `gitkit build apply <name>` | Apply a saved build |
+| `gitkit build delete <name>` | Delete a saved build |
+
+**Example:**
+
+```bash
+# Save current configuration
+gitkit build save rust-dev --description "Rust development setup"
+
+# Apply to another project
+cd /path/to/other/project
+gitkit build apply rust-dev
+```
+
+Builds are saved to `~/.gitkit/builds/` as TOML files.
+
 ---
 
 ## Built-in Hooks

src/builds/mod.rs

@@ -91,7 +91,7 @@ fn default_scope() -> String {
     "local".to_string()
 }
 
-fn builds_dir() -> Result<PathBuf> {
+pub(crate) fn builds_dir() -> Result<PathBuf> {
     let home = std::env::var("HOME").context("HOME environment variable not set")?;
     Ok(PathBuf::from(home).join(".gitkit").join("builds"))
 }
@@ -262,7 +262,7 @@ fn save(name: &str, description: Option<&str>) -> Result<()> {
         anyhow::bail!("Build '{name}' already exists. Delete it first or choose another name.");
     }
 
-    let build = capture_current_config(name, description.unwrap_or(""))?;
+    let build = capture_current_config(name, description)?;
 
     let dir = builds_dir()?;
     fs::create_dir_all(&dir).context("Failed to create builds directory")?;
@@ -274,7 +274,7 @@ fn save(name: &str, description: Option<&str>) -> Result<()> {
     Ok(())
 }
 
-pub(crate) fn capture_current_config(name: &str, description: &str) -> Result<Build> {
+pub(crate) fn capture_current_config(name: &str, description: Option<&str>) -> Result<Build> {
     let root = crate::utils::find_repo_root()?;
 
     let mut builtins = Vec::new();
@@ -328,7 +328,7 @@ pub(crate) fn capture_current_config(name: &str, description: &str) -> Result<Bu
 
     Ok(Build {
         name: name.to_string(),
-        description: description.to_string(),
+        description: description.unwrap_or("").to_string(),
         hooks: HooksConfig {
             builtins,
             custom: Vec::new(),

src/init.rs

@@ -2,7 +2,7 @@ use anyhow::Result;
 use inquire::{MultiSelect, Select, Text};
 use std::{collections::HashSet, fs};
 
-use crate::{attributes, config, git, hooks, ignore, utils::find_repo_root};
+use crate::{attributes, builds, config, git, hooks, ignore, utils::find_repo_root};
 
 const BANNER: &str = r#"
            ███   █████    █████       ███   █████   
@@ -28,6 +28,28 @@ pub fn run() -> Result<()> {
     println!("{BANNER}");
     println!("  Configure your git repo\n");
 
+    // ── Build selection ─────────────────────────────────────────────────────
+    let saved_builds = builds::list_build_names();
+    if !saved_builds.is_empty() {
+        let mut options = vec!["Start fresh configuration".to_string()];
+        options.extend(saved_builds.iter().map(|b| format!("Use build: {b}")));
+
+        let choice = Select::new("Saved builds available", options)
+            .with_help_message("↑↓ move  enter confirm")
+            .prompt_skippable()?
+            .unwrap_or_default();
+
+        if choice != "Start fresh configuration" {
+            let build_name = choice.strip_prefix("Use build: ").unwrap_or(&choice);
+            println!();
+            let build = builds::load_build(build_name)?;
+            builds::apply_build(&build)?;
+            println!("\n  Done\n");
+            return Ok(());
+        }
+        println!();
+    }
+
     let cargo_available = std::process::Command::new("cargo")
         .arg("--version")
         .output()
@@ -255,6 +277,42 @@ pub fn run() -> Result<()> {
         }
     }
 
+    // ── Save as build ─────────────────────────────────────────────────────
+    if nothing {
+        println!("\n  Nothing selected — exiting.");
+        return Ok(());
+    }
+
+    println!();
+    let save_build = inquire::Confirm::new("Save this configuration as a reusable build?")
+        .with_default(false)
+        .prompt()?;
+
+    if save_build {
+        let name = Text::new("  Build name").prompt()?;
+        let description = Text::new("  Description (optional)")
+            .with_default("")
+            .prompt()?;
+        let desc_ref = if description.is_empty() {
+            None
+        } else {
+            Some(description.as_str())
+        };
+        builds::capture_current_config(&name, desc_ref)
+            .and_then(|b| {
+                let dir = builds::builds_dir()?;
+                fs::create_dir_all(&dir)?;
+                let path = dir.join(format!("{name}.toml"));
+                let content = toml::to_string_pretty(&b)?;
+                fs::write(&path, content)?;
+                println!("  ✓ Build '{name}' saved");
+                Ok(())
+            })
+            .unwrap_or_else(|e| {
+                println!("  ⚠ Failed to save build: {e}");
+            });
+    }
+
     println!("\n  Done\n");
     Ok(())
 }