Supporting multiple boards

src/commands/board.rs

@@ -0,0 +1,505 @@
+use anyhow::{Result, Context, bail};
+use colored::*;
+use std::fs;
+
+use crate::board::presets;
+use crate::project::config::{ProjectConfig, CONFIG_FILENAME};
+
+/// Resolve a human-readable name for a board identifier by checking presets.
+fn board_label(fqbn: &str) -> String {
+    for p in presets::PRESETS {
+        if p.fqbn == fqbn {
+            return p.description.to_string();
+        }
+    }
+    fqbn.to_string()
+}
+
+/// List all boards configured for this project.
+pub fn list_boards(project_dir: Option<&str>) -> Result<()> {
+    let project_path = resolve_project_dir(project_dir)?;
+    let config = ProjectConfig::load(&project_path)?;
+
+    println!(
+        "{}",
+        format!("Boards for: {}", config.project.name)
+            .bright_cyan()
+            .bold()
+    );
+    println!();
+
+    let mut names: Vec<&String> = config.boards.keys().collect();
+    names.sort();
+
+    if names.is_empty() {
+        println!(
+            "  {}",
+            "No boards configured.".bright_black()
+        );
+    } else {
+        for name in &names {
+            let profile = &config.boards[*name];
+            let baud_str = match profile.baud {
+                Some(b) => format!("baud={}", b),
+                None => format!("baud={}", config.monitor.baud),
+            };
+            let default_marker = if *name == &config.build.default {
+                " (default)"
+            } else {
+                ""
+            };
+            println!(
+                "  {:9}  {}{}  {}",
+                name.bright_white().bold(),
+                board_label(&profile.fqbn).bright_cyan(),
+                default_marker.green(),
+                baud_str.bright_black()
+            );
+        }
+        if names.len() > 1 {
+            println!();
+            if cfg!(target_os = "windows") {
+                println!(
+                    "  {}",
+                    "Use: build.bat --board <n>".bright_black()
+                );
+            } else {
+                println!(
+                    "  {}",
+                    "Use: ./build.sh --board <n>".bright_black()
+                );
+            }
+        }
+    }
+
+    println!();
+    println!("{}", "Next steps:".bright_yellow().bold());
+
+    println!(
+        "  Add a board:    {}",
+        "anvil board --add mega".bright_cyan()
+    );
+    if config.boards.len() > 1 {
+        println!(
+            "  Remove a board: {}",
+            format!(
+                "anvil board --remove {}",
+                config.boards.keys()
+                    .find(|k| *k != &config.build.default)
+                    .unwrap_or(&config.build.default)
+            ).bright_cyan()
+        );
+    }
+    println!(
+        "  Browse boards:  {}",
+        "anvil board --listall".bright_cyan()
+    );
+    println!();
+
+    Ok(())
+}
+
+/// Show all available boards in a single unified list.
+pub fn listall_boards(search: Option<&str>) -> Result<()> {
+    println!(
+        "{}",
+        "Boards you can add:".bright_cyan().bold()
+    );
+    println!();
+
+    // Filter presets by search term
+    let presets_to_show: Vec<_> = match search {
+        Some(term) => {
+            let lower = term.to_lowercase();
+            presets::PRESETS.iter().filter(|p| {
+                p.name.contains(&lower)
+                    || p.description.to_lowercase().contains(&lower)
+                    || p.also_known_as.to_lowercase().contains(&lower)
+            }).collect()
+        }
+        None => presets::PRESETS.iter().collect(),
+    };
+
+    // Show presets
+    if !presets_to_show.is_empty() {
+        println!(
+            "{}",
+            "Common boards:".bright_cyan().bold()
+        );
+        println!();
+
+        for p in &presets_to_show {
+            println!(
+                "  {}",
+                p.name.bright_white().bold()
+            );
+            let mut board_names = vec![p.description.to_string()];
+            if !p.also_known_as.is_empty() {
+                for alias in p.also_known_as.split(", ") {
+                    board_names.push(alias.to_string());
+                }
+            }
+            println!(
+                "    Works with: {}",
+                board_names.join(", ").bright_black()
+            );
+            println!(
+                "    Add: {}",
+                format!("anvil board --add {}", p.name).bright_cyan()
+            );
+            println!();
+        }
+    }
+
+    // Full catalog from arduino-cli
+    let cli = crate::board::find_arduino_cli();
+    let cli_path = match cli {
+        Some(p) => p,
+        None => {
+            if presets_to_show.is_empty() {
+                println!(
+                    "  {}",
+                    "No boards match your search.".bright_black()
+                );
+            }
+            println!(
+                "{}",
+                "Install arduino-cli to see more boards: anvil setup"
+                    .bright_yellow()
+            );
+            println!();
+            return Ok(());
+        }
+    };
+
+    let mut args = vec!["board", "listall"];
+    if let Some(term) = search {
+        args.push(term);
+    }
+
+    let output = std::process::Command::new(&cli_path)
+        .args(&args)
+        .output()
+        .context("Failed to run arduino-cli board listall")?;
+
+    if !output.status.success() {
+        bail!("arduino-cli board listall failed");
+    }
+
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let lines: Vec<&str> = stdout.lines().collect();
+
+    // Collect non-preset boards
+    let mut other_boards: Vec<(&str, &str)> = Vec::new();
+    for line in lines.iter().skip(1) {
+        let fqbn = line.split_whitespace().last().unwrap_or("");
+        if fqbn.is_empty() {
+            continue;
+        }
+        let board_name = line.trim_end_matches(fqbn).trim();
+        if board_name.is_empty() {
+            continue;
+        }
+        let is_preset = presets::PRESETS.iter().any(|p| p.fqbn == fqbn);
+        if !is_preset {
+            other_boards.push((board_name, fqbn));
+        }
+    }
+
+    if !other_boards.is_empty() {
+        println!(
+            "{}",
+            "More boards:".bright_cyan().bold()
+        );
+        println!();
+
+        for (board_name, fqbn) in &other_boards {
+            let suggested = suggest_short_name(board_name);
+            println!(
+                "  {}",
+                board_name.bright_white()
+            );
+            println!(
+                "    Add: {}",
+                format!(
+                    "anvil board --add {} --id {}",
+                    suggested, fqbn
+                ).bright_cyan()
+            );
+        }
+
+        println!();
+    }
+
+    if presets_to_show.is_empty() && other_boards.is_empty() {
+        println!(
+            "  {}",
+            "No boards match your search.".bright_black()
+        );
+        println!();
+    }
+
+    if search.is_some() {
+        println!(
+            "  {}",
+            "See all: anvil board --listall".bright_black()
+        );
+    } else {
+        println!(
+            "  {}",
+            "Search: anvil board --listall <search>".bright_black()
+        );
+    }
+    println!(
+        "  {}",
+        "Remove: anvil board --remove <n>".bright_black()
+    );
+    if cfg!(target_os = "windows") {
+        println!(
+            "  {}",
+            "Use:    upload.bat --board <n>".bright_black()
+        );
+    } else {
+        println!(
+            "  {}",
+            "Use:    ./upload.sh --board <n>".bright_black()
+        );
+    }
+    println!();
+
+    Ok(())
+}
+
+/// Suggest a short project name from a board's display name.
+fn suggest_short_name(board_name: &str) -> String {
+    let lower = board_name.to_lowercase();
+
+    let stripped = lower
+        .trim_start_matches("arduino ")
+        .trim_start_matches("adafruit ")
+        .trim_start_matches("sparkfun ")
+        .trim_start_matches("seeed ");
+
+    let meaningful = if let Some(pos) = stripped.find(" or ") {
+        stripped[pos + 4..].trim()
+    } else {
+        stripped.trim()
+    };
+
+    let words: Vec<&str> = meaningful
+        .split(|c: char| !c.is_alphanumeric())
+        .filter(|w| {
+            !w.is_empty()
+                && !matches!(*w, "the" | "a" | "arduino" | "board")
+        })
+        .collect();
+
+    if words.is_empty() {
+        let fallback: Vec<&str> = stripped
+            .split(|c: char| !c.is_alphanumeric())
+            .filter(|w| !w.is_empty() && *w != "arduino")
+            .take(2)
+            .collect();
+        if fallback.is_empty() {
+            "board".to_string()
+        } else {
+            fallback.join("-")
+        }
+    } else if words.len() == 1 {
+        words[0].to_string()
+    } else {
+        words.iter().take(2).copied().collect::<Vec<_>>().join("-")
+    }
+}
+
+/// Add a board to .anvil.toml.
+pub fn add_board(
+    name: &str,
+    id: Option<&str>,
+    baud: Option<u32>,
+    project_dir: Option<&str>,
+) -> Result<()> {
+    let project_path = resolve_project_dir(project_dir)?;
+    let config = ProjectConfig::load(&project_path)?;
+
+    if config.boards.contains_key(name) {
+        bail!(
+            "Board '{}' already exists.\n  \
+             Remove it first: anvil board --remove {}",
+            name, name
+        );
+    }
+
+    // Resolve the board identifier: explicit --id > preset lookup > error
+    let resolved_id = match id {
+        Some(f) => f.to_string(),
+        None => {
+            match presets::find_preset(name) {
+                Some(preset) => {
+                    preset.fqbn.to_string()
+                }
+                None => {
+                    println!(
+                        "{}",
+                        format!(
+                            "'{}' is not a recognized board name.",
+                            name
+                        ).bright_yellow()
+                    );
+                    println!();
+                    println!(
+                        "  {}",
+                        "Find your board:"
+                    );
+                    println!(
+                        "    {}",
+                        "anvil board --listall".bright_cyan()
+                    );
+                    println!(
+                        "    {}",
+                        format!("anvil board --listall {}", name).bright_cyan()
+                    );
+                    bail!("Run anvil board --listall to find the right command.");
+                }
+            }
+        }
+    };
+
+    // Resolve baud: explicit > preset default > None (inherit)
+    let resolved_baud = match baud {
+        Some(b) => Some(b),
+        None => {
+            if let Some(preset) = presets::find_preset(name) {
+                if preset.baud != config.monitor.baud {
+                    Some(preset.baud)
+                } else {
+                    None
+                }
+            } else {
+                None
+            }
+        }
+    };
+
+    // Append to .anvil.toml as text to preserve formatting and comments
+    let config_path = project_path.join(CONFIG_FILENAME);
+    let mut content = fs::read_to_string(&config_path)
+        .context("Failed to read .anvil.toml")?;
+
+    let mut section = format!("\n[boards.{}]\n", name);
+    section.push_str(&format!("fqbn = \"{}\"\n", resolved_id));
+    if let Some(b) = resolved_baud {
+        section.push_str(&format!("baud = {}\n", b));
+    }
+
+    content.push_str(&section);
+    fs::write(&config_path, content)
+        .context("Failed to write .anvil.toml")?;
+
+    let label = board_label(&resolved_id);
+    println!(
+        "{} Added board: {} ({})",
+        "ok".green(),
+        name.bright_white().bold(),
+        label.bright_cyan()
+    );
+    if let Some(b) = resolved_baud {
+        println!("  baud = {}", b.to_string().bright_cyan());
+    }
+    println!();
+
+    if cfg!(target_os = "windows") {
+        println!(
+            "  {}",
+            format!("Use: build.bat --board {}", name).bright_black()
+        );
+    } else {
+        println!(
+            "  {}",
+            format!("Use: ./build.sh --board {}", name).bright_black()
+        );
+    }
+    println!();
+
+    Ok(())
+}
+
+/// Remove a board from .anvil.toml.
+pub fn remove_board(name: &str, project_dir: Option<&str>) -> Result<()> {
+    let project_path = resolve_project_dir(project_dir)?;
+    let config = ProjectConfig::load(&project_path)?;
+
+    if !config.boards.contains_key(name) {
+        let available: Vec<&String> = config.boards.keys().collect();
+        if available.is_empty() {
+            bail!("No boards configured.");
+        } else {
+            bail!(
+                "No board '{}' found.\n  Available: {}",
+                name,
+                available.iter().map(|s| s.as_str()).collect::<Vec<_>>().join(", ")
+            );
+        }
+    }
+
+    // Don't allow removing the default board
+    if name == config.build.default {
+        bail!(
+            "Cannot remove '{}' because it is the default board.\n  \
+             Change the default in .anvil.toml first, or remove a different board.",
+            name
+        );
+    }
+
+    let config_path = project_path.join(CONFIG_FILENAME);
+    let content = fs::read_to_string(&config_path)
+        .context("Failed to read .anvil.toml")?;
+
+    let section_header = format!("[boards.{}]", name);
+    let mut output = String::new();
+    let mut skipping = false;
+
+    for line in content.lines() {
+        let trimmed = line.trim();
+        if trimmed == section_header {
+            skipping = true;
+            continue;
+        }
+        if skipping && trimmed.starts_with('[') {
+            skipping = false;
+        }
+        if skipping {
+            if trimmed.is_empty() || trimmed.starts_with('#') || trimmed.contains('=') {
+                continue;
+            }
+            skipping = false;
+        }
+        output.push_str(line);
+        output.push('\n');
+    }
+
+    while output.ends_with("\n\n\n") {
+        output.pop();
+    }
+
+    fs::write(&config_path, &output)
+        .context("Failed to write .anvil.toml")?;
+
+    println!(
+        "{} Removed board: {}",
+        "ok".green(),
+        name.bright_white().bold()
+    );
+    println!();
+
+    Ok(())
+}
+
+fn resolve_project_dir(project_dir: Option<&str>) -> Result<std::path::PathBuf> {
+    let start = match project_dir {
+        Some(dir) => std::path::PathBuf::from(dir),
+        None => std::env::current_dir()
+            .context("Could not determine current directory")?,
+    };
+    ProjectConfig::find_project_root(&start)
+}

src/commands/doctor.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use colored::*;
+use std::io::{self, Write};
 
 use crate::board;
 
@@ -22,7 +23,7 @@ impl SystemHealth {
     }
 }
 
-pub fn run_diagnostics() -> Result<()> {
+pub fn run_diagnostics(fix: bool) -> Result<()> {
     println!(
         "{}",
         "Checking system health...".bright_yellow().bold()
@@ -40,6 +41,19 @@ pub fn run_diagnostics() -> Result<()> {
                 .bright_green()
                 .bold()
         );
+        if fix {
+            // Check optional tools
+            let optional_missing = !health.cmake_ok
+                || !health.cpp_compiler_ok
+                || !health.git_ok;
+            if optional_missing {
+                println!();
+                run_fix_optional(&health)?;
+            }
+        }
+    } else if fix {
+        println!();
+        run_fix(&health)?;
     } else {
         println!(
             "{}",
@@ -49,6 +63,11 @@ pub fn run_diagnostics() -> Result<()> {
         );
         println!();
         print_fix_instructions(&health);
+        println!(
+            "  {}",
+            "Or run: anvil doctor --fix  (to install missing tools automatically)"
+                .bright_cyan()
+        );
     }
     println!();
 
@@ -155,7 +174,7 @@ fn print_diagnostics(health: &SystemHealth) {
     println!("{}", "Optional:".bright_yellow().bold());
     println!();
 
-    // avr-size -- installed as part of the avr core, not a separate step
+    // avr-size
     if health.avr_size_ok {
         println!("  {} avr-size (binary size reporting)", "ok".green());
     } else if !health.avr_core_ok {
@@ -165,9 +184,6 @@ fn print_diagnostics(health: &SystemHealth) {
             "included with arduino:avr core (no separate install)".yellow()
         );
     } else {
-        // Core is installed but avr-size is not on PATH --
-        // this can happen on Windows where the tool is buried
-        // inside the Arduino15 packages directory.
         println!(
             "  {} avr-size  {}",
             "na".yellow(),
@@ -300,7 +316,6 @@ fn print_fix_instructions(health: &SystemHealth) {
     }
 
     if !health.arduino_cli_ok {
-        // They need to open a new terminal after installing arduino-cli
         println!(
             "  {}. {}",
             step,
@@ -353,6 +368,365 @@ fn print_fix_instructions(health: &SystemHealth) {
     }
 }
 
+// ==========================================================================
+// --fix: automated installation
+// ==========================================================================
+
+/// Prompt the user for yes/no confirmation.
+fn confirm(prompt: &str) -> bool {
+    print!("{} [Y/n] ", prompt);
+    io::stdout().flush().ok();
+    let mut input = String::new();
+    if io::stdin().read_line(&mut input).is_err() {
+        return false;
+    }
+    let trimmed = input.trim().to_lowercase();
+    trimmed.is_empty() || trimmed == "y" || trimmed == "yes"
+}
+
+/// Run a command, streaming output to the terminal.
+fn run_cmd(program: &str, args: &[&str]) -> bool {
+    println!(
+        "  {} {} {}",
+        "$".bright_black(),
+        program.bright_cyan(),
+        args.join(" ").bright_cyan()
+    );
+    std::process::Command::new(program)
+        .args(args)
+        .status()
+        .map(|s| s.success())
+        .unwrap_or(false)
+}
+
+/// Detect which package manager is available on the system.
+fn detect_package_manager() -> Option<&'static str> {
+    if cfg!(target_os = "windows") {
+        if which::which("winget").is_ok() {
+            Some("winget")
+        } else if which::which("choco").is_ok() {
+            Some("choco")
+        } else {
+            None
+        }
+    } else if cfg!(target_os = "macos") {
+        if which::which("brew").is_ok() {
+            Some("brew")
+        } else {
+            None
+        }
+    } else {
+        // Linux
+        if which::which("apt").is_ok() {
+            Some("apt")
+        } else if which::which("dnf").is_ok() {
+            Some("dnf")
+        } else if which::which("pacman").is_ok() {
+            Some("pacman")
+        } else {
+            None
+        }
+    }
+}
+
+/// Fix required items (arduino-cli, avr core).
+fn run_fix(health: &SystemHealth) -> Result<()> {
+    let pm = detect_package_manager();
+
+    // -- arduino-cli --
+    if !health.arduino_cli_ok {
+        println!(
+            "{}",
+            "arduino-cli is required but not installed.".bright_yellow()
+        );
+
+        match pm {
+            Some("winget") => {
+                if confirm("Install arduino-cli via winget?") {
+                    if !run_cmd("winget", &["install", "--id", "ArduinoSA.CLI", "-e"]) {
+                        println!("{} winget install failed. Try installing manually.", "FAIL".red());
+                        return Ok(());
+                    }
+                    println!(
+                        "{} arduino-cli installed. {} to update PATH.",
+                        "ok".green(),
+                        "Restart your terminal".bright_yellow()
+                    );
+                    return Ok(());
+                }
+            }
+            Some("choco") => {
+                if confirm("Install arduino-cli via Chocolatey?") {
+                    if !run_cmd("choco", &["install", "arduino-cli", "-y"]) {
+                        println!("{} choco install failed. Try installing manually.", "FAIL".red());
+                        return Ok(());
+                    }
+                    println!(
+                        "{} arduino-cli installed. {} to update PATH.",
+                        "ok".green(),
+                        "Restart your terminal".bright_yellow()
+                    );
+                    return Ok(());
+                }
+            }
+            Some("brew") => {
+                if confirm("Install arduino-cli via Homebrew?") {
+                    if !run_cmd("brew", &["install", "arduino-cli"]) {
+                        println!("{} brew install failed.", "FAIL".red());
+                        return Ok(());
+                    }
+                    println!("{} arduino-cli installed.", "ok".green());
+                }
+            }
+            Some("apt") => {
+                if confirm("Install arduino-cli via apt?") {
+                    if !run_cmd("sudo", &["apt", "install", "-y", "arduino-cli"]) {
+                        println!(
+                            "{} apt install failed. Try the curl installer instead:",
+                            "FAIL".red()
+                        );
+                        println!(
+                            "  {}",
+                            "curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh"
+                                .bright_cyan()
+                        );
+                        return Ok(());
+                    }
+                    println!("{} arduino-cli installed.", "ok".green());
+                }
+            }
+            Some("dnf") => {
+                println!(
+                    "  arduino-cli is not in dnf repos. Install manually:"
+                );
+                println!(
+                    "  {}",
+                    "curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh"
+                        .bright_cyan()
+                );
+                return Ok(());
+            }
+            Some("pacman") => {
+                if confirm("Install arduino-cli via pacman (AUR)?") {
+                    if !run_cmd("yay", &["-S", "--noconfirm", "arduino-cli"]) {
+                        println!("{} AUR install failed. Try the curl installer.", "FAIL".red());
+                        return Ok(());
+                    }
+                    println!("{} arduino-cli installed.", "ok".green());
+                }
+            }
+            _ => {
+                println!(
+                    "  No supported package manager found. Install manually:"
+                );
+                println!(
+                    "  {}",
+                    "https://arduino.github.io/arduino-cli/installation/"
+                        .bright_cyan()
+                );
+                return Ok(());
+            }
+        }
+
+        // Re-check after install
+        if board::find_arduino_cli().is_none() {
+            println!();
+            println!(
+                "{} arduino-cli not found after install. You may need to restart your terminal.",
+                "warn".yellow()
+            );
+            return Ok(());
+        }
+    }
+
+    // -- AVR core --
+    if !health.avr_core_ok {
+        if health.arduino_cli_ok || board::find_arduino_cli().is_some() {
+            println!();
+            println!(
+                "{}",
+                "arduino:avr core is required but not installed.".bright_yellow()
+            );
+            if confirm("Install arduino:avr core now?") {
+                let cli = board::find_arduino_cli()
+                    .unwrap_or_else(|| std::path::PathBuf::from("arduino-cli"));
+                let cli_str = cli.to_string_lossy();
+                if !run_cmd(&cli_str, &["core", "install", "arduino:avr"]) {
+                    println!("{} Core installation failed.", "FAIL".red());
+                    return Ok(());
+                }
+                println!("{} arduino:avr core installed.", "ok".green());
+            }
+        }
+    }
+
+    // Offer optional tools too
+    run_fix_optional(health)?;
+
+    Ok(())
+}
+
+/// Fix optional items (cmake, C++ compiler, git).
+fn run_fix_optional(health: &SystemHealth) -> Result<()> {
+    let pm = detect_package_manager();
+
+    let items: Vec<(&str, bool, FixSpec)> = vec![
+        ("cmake", health.cmake_ok, fix_spec_cmake(pm)),
+        ("C++ compiler", health.cpp_compiler_ok, fix_spec_cpp(pm)),
+        ("git", health.git_ok, fix_spec_git(pm)),
+    ];
+
+    let missing: Vec<_> = items.iter().filter(|(_, ok, _)| !ok).collect();
+    if missing.is_empty() {
+        return Ok(());
+    }
+
+    println!();
+    println!("{}", "Optional tools:".bright_yellow().bold());
+
+    for (name, _, spec) in &missing {
+        match spec {
+            FixSpec::Auto { prompt, program, args } => {
+                if confirm(prompt) {
+                    if run_cmd(program, args) {
+                        println!("{} {} installed.", "ok".green(), name);
+                    } else {
+                        println!("{} Failed to install {}.", "FAIL".red(), name);
+                    }
+                }
+            }
+            FixSpec::Manual { message } => {
+                println!("  {}: {}", name, message.bright_black());
+            }
+        }
+    }
+
+    Ok(())
+}
+
+enum FixSpec {
+    Auto {
+        prompt: &'static str,
+        program: &'static str,
+        args: &'static [&'static str],
+    },
+    Manual {
+        message: &'static str,
+    },
+}
+
+fn fix_spec_cmake(pm: Option<&str>) -> FixSpec {
+    match pm {
+        Some("winget") => FixSpec::Auto {
+            prompt: "Install cmake via winget?",
+            program: "winget",
+            args: &["install", "--id", "Kitware.CMake", "-e"],
+        },
+        Some("choco") => FixSpec::Auto {
+            prompt: "Install cmake via Chocolatey?",
+            program: "choco",
+            args: &["install", "cmake", "-y"],
+        },
+        Some("brew") => FixSpec::Auto {
+            prompt: "Install cmake via Homebrew?",
+            program: "brew",
+            args: &["install", "cmake"],
+        },
+        Some("apt") => FixSpec::Auto {
+            prompt: "Install cmake via apt?",
+            program: "sudo",
+            args: &["apt", "install", "-y", "cmake"],
+        },
+        Some("dnf") => FixSpec::Auto {
+            prompt: "Install cmake via dnf?",
+            program: "sudo",
+            args: &["dnf", "install", "-y", "cmake"],
+        },
+        Some("pacman") => FixSpec::Auto {
+            prompt: "Install cmake via pacman?",
+            program: "sudo",
+            args: &["pacman", "-S", "--noconfirm", "cmake"],
+        },
+        _ => FixSpec::Manual {
+            message: "install from https://cmake.org/download/",
+        },
+    }
+}
+
+fn fix_spec_cpp(pm: Option<&str>) -> FixSpec {
+    match pm {
+        Some("winget") => FixSpec::Auto {
+            prompt: "Install Visual Studio Build Tools via winget?",
+            program: "winget",
+            args: &["install", "--id", "Microsoft.VisualStudio.2022.BuildTools", "-e"],
+        },
+        Some("choco") => FixSpec::Auto {
+            prompt: "Install MinGW g++ via Chocolatey?",
+            program: "choco",
+            args: &["install", "mingw", "-y"],
+        },
+        Some("brew") => FixSpec::Manual {
+            message: "run: xcode-select --install",
+        },
+        Some("apt") => FixSpec::Auto {
+            prompt: "Install g++ via apt?",
+            program: "sudo",
+            args: &["apt", "install", "-y", "g++"],
+        },
+        Some("dnf") => FixSpec::Auto {
+            prompt: "Install g++ via dnf?",
+            program: "sudo",
+            args: &["dnf", "install", "-y", "gcc-c++"],
+        },
+        Some("pacman") => FixSpec::Auto {
+            prompt: "Install g++ via pacman?",
+            program: "sudo",
+            args: &["pacman", "-S", "--noconfirm", "gcc"],
+        },
+        _ => FixSpec::Manual {
+            message: "install a C++ compiler (g++, clang++, or MSVC)",
+        },
+    }
+}
+
+fn fix_spec_git(pm: Option<&str>) -> FixSpec {
+    match pm {
+        Some("winget") => FixSpec::Auto {
+            prompt: "Install git via winget?",
+            program: "winget",
+            args: &["install", "--id", "Git.Git", "-e"],
+        },
+        Some("choco") => FixSpec::Auto {
+            prompt: "Install git via Chocolatey?",
+            program: "choco",
+            args: &["install", "git", "-y"],
+        },
+        Some("brew") => FixSpec::Auto {
+            prompt: "Install git via Homebrew?",
+            program: "brew",
+            args: &["install", "git"],
+        },
+        Some("apt") => FixSpec::Auto {
+            prompt: "Install git via apt?",
+            program: "sudo",
+            args: &["apt", "install", "-y", "git"],
+        },
+        Some("dnf") => FixSpec::Auto {
+            prompt: "Install git via dnf?",
+            program: "sudo",
+            args: &["dnf", "install", "-y", "git"],
+        },
+        Some("pacman") => FixSpec::Auto {
+            prompt: "Install git via pacman?",
+            program: "sudo",
+            args: &["pacman", "-S", "--noconfirm", "git"],
+        },
+        _ => FixSpec::Manual {
+            message: "install from https://git-scm.com",
+        },
+    }
+}
+
 // ---------------------------------------------------------------------------
 // Platform-aware install hints (one-liners for the diagnostics table)
 // ---------------------------------------------------------------------------

src/commands/mod.rs

@@ -3,3 +3,4 @@ pub mod doctor;
 pub mod setup;
 pub mod devices;
 pub mod refresh;
+pub mod board;

src/commands/new.rs

@@ -48,7 +48,6 @@ pub fn list_boards() -> Result<()> {
         if !preset.also_known_as.is_empty() {
             println!("      Also: {}", preset.also_known_as.bright_black());
         }
-        println!("      FQBN: {}", preset.fqbn.bright_black());
         println!();
     }
 
@@ -59,11 +58,11 @@ pub fn list_boards() -> Result<()> {
     println!();
     println!(
         "  {}",
-        "For boards not listed here, create a project and edit the".bright_black()
+        "For boards not listed here, create a project and then:".bright_black()
     );
     println!(
         "  {}",
-        "fqbn value in .anvil.toml to any valid arduino-cli FQBN.".bright_black()
+        "  anvil board --listall".bright_black()
     );
     println!();
 
@@ -128,10 +127,6 @@ pub fn create_project(
         "{}",
         format!("Board:    {} ({})", preset.name, preset.description).bright_cyan()
     );
-    println!(
-        "{}",
-        format!("FQBN:     {}", preset.fqbn).bright_black()
-    );
     println!();
 
     // Create project directory
@@ -142,6 +137,7 @@ pub fn create_project(
     let context = TemplateContext {
         project_name: name.to_string(),
         anvil_version: ANVIL_VERSION.to_string(),
+        board_name: preset.name.to_string(),
         fqbn: preset.fqbn.to_string(),
         baud: preset.baud,
     };

src/commands/refresh.rs

@@ -47,7 +47,8 @@ pub fn run_refresh(project_dir: Option<&str>, force: bool) -> Result<()> {
     let context = TemplateContext {
         project_name: config.project.name.clone(),
         anvil_version: ANVIL_VERSION.to_string(),
-        fqbn: config.build.fqbn.clone(),
+        board_name: config.build.default.clone(),
+        fqbn: config.default_fqbn().unwrap_or_else(|_| "arduino:avr:uno".to_string()),
         baud: config.monitor.baud,
     };
 

src/main.rs

@@ -45,7 +45,11 @@ enum Commands {
     },
 
     /// Check system health and diagnose issues
-    Doctor,
+    Doctor {
+        /// Automatically install missing tools
+        #[arg(long)]
+        fix: bool,
+    },
 
     /// Install arduino-cli and required cores
     Setup,
@@ -81,6 +85,36 @@ enum Commands {
         #[arg(long)]
         force: bool,
     },
+
+    /// Manage board profiles in .anvil.toml
+    Board {
+        /// Board name (e.g. mega, nano)
+        name: Option<String>,
+
+        /// Add a board to the project
+        #[arg(long, conflicts_with_all = ["remove", "listall"])]
+        add: bool,
+
+        /// Remove a board from the project
+        #[arg(long, conflicts_with_all = ["add", "listall"])]
+        remove: bool,
+
+        /// Browse all available boards
+        #[arg(long, conflicts_with_all = ["add", "remove"])]
+        listall: bool,
+
+        /// Board identifier (from anvil board --listall)
+        #[arg(long, value_name = "ID")]
+        id: Option<String>,
+
+        /// Baud rate override
+        #[arg(long, value_name = "RATE")]
+        baud: Option<u32>,
+
+        /// Path to project directory (defaults to current directory)
+        #[arg(long, short = 'd', value_name = "DIR")]
+        dir: Option<String>,
+    },
 }
 
 fn main() -> Result<()> {
@@ -113,8 +147,8 @@ fn main() -> Result<()> {
                 );
             }
         }
-        Commands::Doctor => {
+        Commands::Doctor { fix } => {
-            commands::doctor::run_diagnostics()
+            commands::doctor::run_diagnostics(fix)
         }
         Commands::Setup => {
             commands::setup::run_setup()
@@ -143,6 +177,38 @@ fn main() -> Result<()> {
                 force,
             )
         }
+        Commands::Board { name, add, remove, listall, id, baud, dir } => {
+            if listall {
+                commands::board::listall_boards(name.as_deref())
+            } else if add {
+                let board_name = name.as_deref().ok_or_else(|| {
+                    anyhow::anyhow!(
+                        "Board name required.\n\
+                         Usage: anvil board --add mega\n\
+                         Browse available boards: anvil board --listall"
+                    )
+                })?;
+                commands::board::add_board(
+                    board_name,
+                    id.as_deref(),
+                    baud,
+                    dir.as_deref(),
+                )
+            } else if remove {
+                let board_name = name.as_deref().ok_or_else(|| {
+                    anyhow::anyhow!(
+                        "Board name required.\n\
+                         Usage: anvil board --remove mega"
+                    )
+                })?;
+                commands::board::remove_board(
+                    board_name,
+                    dir.as_deref(),
+                )
+            } else {
+                commands::board::list_boards(dir.as_deref())
+            }
+        }
     }
 }
 

src/project/config.rs

@@ -1,4 +1,5 @@
 use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::fs;
 use anyhow::{Result, Context, bail};
@@ -12,6 +13,8 @@ pub struct ProjectConfig {
     pub project: ProjectMeta,
     pub build: BuildConfig,
     pub monitor: MonitorConfig,
+    #[serde(default)]
+    pub boards: HashMap<String, BoardProfile>,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -22,10 +25,15 @@ pub struct ProjectMeta {
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct BuildConfig {
-    pub fqbn: String,
+    /// Name of the default board from [boards.*]
+    #[serde(default)]
+    pub default: String,
     pub warnings: String,
     pub include_dirs: Vec<String>,
     pub extra_flags: Vec<String>,
+    /// Legacy: FQBN used to live here directly. Now lives in [boards.*].
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub fqbn: Option<String>,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -35,16 +43,30 @@ pub struct MonitorConfig {
     pub port: Option<String>,
 }
 
+/// A named board with its FQBN and optional baud override.
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct BoardProfile {
+    pub fqbn: String,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub baud: Option<u32>,
+}
+
 impl ProjectConfig {
     /// Create a new project config with sensible defaults.
     pub fn new(name: &str) -> Self {
+        let mut boards = HashMap::new();
+        boards.insert("uno".to_string(), BoardProfile {
+            fqbn: "arduino:avr:uno".to_string(),
+            baud: None,
+        });
         Self {
             project: ProjectMeta {
                 name: name.to_string(),
                 anvil_version: ANVIL_VERSION.to_string(),
             },
             build: BuildConfig {
-                fqbn: "arduino:avr:uno".to_string(),
+                default: "uno".to_string(),
+                fqbn: None,
                 warnings: "more".to_string(),
                 include_dirs: vec!["lib/hal".to_string(), "lib/app".to_string()],
                 extra_flags: vec!["-Werror".to_string()],
@@ -53,6 +75,61 @@ impl ProjectConfig {
                 baud: 115200,
                 port: None,
             },
+            boards,
+        }
+    }
+
+    /// Create a new project config with a specific board preset.
+    pub fn new_with_board(name: &str, board_name: &str, fqbn: &str, baud: u32) -> Self {
+        let mut config = Self::new(name);
+        config.build.default = board_name.to_string();
+        config.boards.clear();
+        config.boards.insert(board_name.to_string(), BoardProfile {
+            fqbn: fqbn.to_string(),
+            baud: None,
+        });
+        config.monitor.baud = baud;
+        config
+    }
+
+    /// Get the default board's FQBN and baud.
+    pub fn default_board(&self) -> Result<(String, u32)> {
+        self.resolve_board(&self.build.default)
+    }
+
+    /// Get the default board's FQBN.
+    pub fn default_fqbn(&self) -> Result<String> {
+        let (fqbn, _) = self.default_board()?;
+        Ok(fqbn)
+    }
+
+    /// Resolve the FQBN and baud for a named board.
+    /// Returns (fqbn, baud).
+    pub fn resolve_board(&self, board_name: &str) -> Result<(String, u32)> {
+        match self.boards.get(board_name) {
+            Some(profile) => {
+                let baud = profile.baud.unwrap_or(self.monitor.baud);
+                Ok((profile.fqbn.clone(), baud))
+            }
+            None => {
+                let available: Vec<&String> = self.boards.keys().collect();
+                if available.is_empty() {
+                    bail!(
+                        "No board '{}' found in .anvil.toml.\n  \
+                         No boards are defined. Add one: anvil board --add {}",
+                        board_name, board_name
+                    );
+                } else {
+                    bail!(
+                        "No board '{}' found in .anvil.toml.\n  \
+                         Available: {}\n  \
+                         Add it: anvil board --add {}",
+                        board_name,
+                        available.iter().map(|s| s.as_str()).collect::<Vec<_>>().join(", "),
+                        board_name
+                    );
+                }
+            }
         }
     }
 
@@ -68,8 +145,24 @@ impl ProjectConfig {
         }
         let contents = fs::read_to_string(&config_path)
             .context(format!("Failed to read {}", config_path.display()))?;
-        let config: ProjectConfig = toml::from_str(&contents)
+        let mut config: ProjectConfig = toml::from_str(&contents)
             .context(format!("Failed to parse {}", config_path.display()))?;
+
+        // Migrate old format: fqbn in [build] -> [boards.X] + default
+        if config.build.default.is_empty() {
+            if let Some(legacy_fqbn) = config.build.fqbn.take() {
+                let board_name = crate::board::presets::PRESETS.iter()
+                    .find(|p| p.fqbn == legacy_fqbn)
+                    .map(|p| p.name.to_string())
+                    .unwrap_or_else(|| "default".to_string());
+                config.boards.entry(board_name.clone()).or_insert(BoardProfile {
+                    fqbn: legacy_fqbn,
+                    baud: None,
+                });
+                config.build.default = board_name;
+            }
+        }
+
         Ok(config)
     }
 
@@ -155,9 +248,11 @@ mod tests {
     fn test_new_config_defaults() {
         let config = ProjectConfig::new("test_project");
         assert_eq!(config.project.name, "test_project");
-        assert_eq!(config.build.fqbn, "arduino:avr:uno");
+        assert_eq!(config.build.default, "uno");
         assert_eq!(config.monitor.baud, 115200);
         assert!(config.build.include_dirs.contains(&"lib/hal".to_string()));
+        assert!(config.boards.contains_key("uno"));
+        assert_eq!(config.boards["uno"].fqbn, "arduino:avr:uno");
     }
 
     #[test]
@@ -168,8 +263,20 @@ mod tests {
 
         let loaded = ProjectConfig::load(tmp.path()).unwrap();
         assert_eq!(loaded.project.name, "roundtrip");
-        assert_eq!(loaded.build.fqbn, config.build.fqbn);
+        assert_eq!(loaded.build.default, "uno");
         assert_eq!(loaded.monitor.baud, config.monitor.baud);
+        assert!(loaded.boards.contains_key("uno"));
+    }
+
+    #[test]
+    fn test_new_with_board() {
+        let config = ProjectConfig::new_with_board(
+            "test", "mega", "arduino:avr:mega:cpu=atmega2560", 115200
+        );
+        assert_eq!(config.build.default, "mega");
+        assert!(config.boards.contains_key("mega"));
+        assert_eq!(config.boards["mega"].fqbn, "arduino:avr:mega:cpu=atmega2560");
+        assert!(!config.boards.contains_key("uno"));
     }
 
     #[test]
@@ -178,7 +285,6 @@ mod tests {
         let config = ProjectConfig::new("finder");
         config.save(tmp.path()).unwrap();
 
-        // Create a subdirectory and search from there
         let sub = tmp.path().join("sketch").join("deep");
         fs::create_dir_all(&sub).unwrap();
 
@@ -219,4 +325,61 @@ mod tests {
         assert!(flags.contains("-Werror"));
         assert!(flags.contains("-I"));
     }
+
+    #[test]
+    fn test_default_board() {
+        let config = ProjectConfig::new("test");
+        let (fqbn, baud) = config.default_board().unwrap();
+        assert_eq!(fqbn, "arduino:avr:uno");
+        assert_eq!(baud, 115200);
+    }
+
+    #[test]
+    fn test_resolve_board_named() {
+        let mut config = ProjectConfig::new("test");
+        config.boards.insert("mega".to_string(), BoardProfile {
+            fqbn: "arduino:avr:mega:cpu=atmega2560".to_string(),
+            baud: Some(9600),
+        });
+
+        let (fqbn, baud) = config.resolve_board("mega").unwrap();
+        assert_eq!(fqbn, "arduino:avr:mega:cpu=atmega2560");
+        assert_eq!(baud, 9600);
+    }
+
+    #[test]
+    fn test_resolve_board_inherits_baud() {
+        let mut config = ProjectConfig::new("test");
+        config.boards.insert("nano".to_string(), BoardProfile {
+            fqbn: "arduino:avr:nano:cpu=atmega328".to_string(),
+            baud: None,
+        });
+
+        let (fqbn, baud) = config.resolve_board("nano").unwrap();
+        assert_eq!(fqbn, "arduino:avr:nano:cpu=atmega328");
+        assert_eq!(baud, 115200);
+    }
+
+    #[test]
+    fn test_resolve_board_unknown() {
+        let config = ProjectConfig::new("test");
+        assert!(config.resolve_board("esp32").is_err());
+    }
+
+    #[test]
+    fn test_board_roundtrip() {
+        let tmp = TempDir::new().unwrap();
+        let mut config = ProjectConfig::new("multi");
+        config.boards.insert("mega".to_string(), BoardProfile {
+            fqbn: "arduino:avr:mega:cpu=atmega2560".to_string(),
+            baud: Some(57600),
+        });
+        config.save(tmp.path()).unwrap();
+
+        let loaded = ProjectConfig::load(tmp.path()).unwrap();
+        assert!(loaded.boards.contains_key("mega"));
+        let mega = &loaded.boards["mega"];
+        assert_eq!(mega.fqbn, "arduino:avr:mega:cpu=atmega2560");
+        assert_eq!(mega.baud, Some(57600));
+    }
 }

src/templates/mod.rs

@@ -10,6 +10,7 @@ static BASIC_TEMPLATE: Dir = include_dir!("$CARGO_MANIFEST_DIR/templates/basic")
 pub struct TemplateContext {
     pub project_name: String,
     pub anvil_version: String,
+    pub board_name: String,
     pub fqbn: String,
     pub baud: u32,
 }
@@ -142,6 +143,7 @@ fn substitute_variables(text: &str, context: &TemplateContext) -> String {
     text.replace("{{PROJECT_NAME}}", &context.project_name)
         .replace("{{ANVIL_VERSION}}", &context.anvil_version)
         .replace("{{ANVIL_VERSION_CURRENT}}", ANVIL_VERSION)
+        .replace("{{BOARD_NAME}}", &context.board_name)
         .replace("{{FQBN}}", &context.fqbn)
         .replace("{{BAUD}}", &context.baud.to_string())
 }
@@ -176,14 +178,15 @@ mod tests {
         let ctx = TemplateContext {
             project_name: "my_project".to_string(),
             anvil_version: "1.0.0".to_string(),
+            board_name: "mega".to_string(),
             fqbn: "arduino:avr:mega:cpu=atmega2560".to_string(),
             baud: 9600,
         };
-        let input = "Name: {{PROJECT_NAME}}, Version: {{ANVIL_VERSION}}, FQBN: {{FQBN}}, Baud: {{BAUD}}";
+        let input = "Name: {{PROJECT_NAME}}, Board: {{BOARD_NAME}}, FQBN: {{FQBN}}, Baud: {{BAUD}}";
         let output = substitute_variables(input, &ctx);
         assert_eq!(
             output,
-            "Name: my_project, Version: 1.0.0, FQBN: arduino:avr:mega:cpu=atmega2560, Baud: 9600"
+            "Name: my_project, Board: mega, FQBN: arduino:avr:mega:cpu=atmega2560, Baud: 9600"
         );
     }
 
@@ -199,6 +202,7 @@ mod tests {
         let ctx = TemplateContext {
             project_name: "test_proj".to_string(),
             anvil_version: "1.0.0".to_string(),
+            board_name: "uno".to_string(),
             fqbn: "arduino:avr:uno".to_string(),
             baud: 115200,
         };
@@ -231,6 +235,7 @@ mod tests {
         let ctx = TemplateContext {
             project_name: "my_sensor".to_string(),
             anvil_version: "1.0.0".to_string(),
+            board_name: "uno".to_string(),
             fqbn: "arduino:avr:uno".to_string(),
             baud: 115200,
         };

templates/basic/_dot_anvil.toml.tmpl

@@ -3,10 +3,25 @@ name = "{{PROJECT_NAME}}"
 anvil_version = "{{ANVIL_VERSION}}"
 
 [build]
-fqbn = "{{FQBN}}"
+default = "{{BOARD_NAME}}"
 warnings = "more"
 include_dirs = ["lib/hal", "lib/app"]
 extra_flags = ["-Werror"]
 
 [monitor]
 baud = {{BAUD}}
+
+[boards.{{BOARD_NAME}}]
+fqbn = "{{FQBN}}"
+
+# -- Additional boards -----------------------------------------------------
+# Add more boards here. Use --board NAME with any script:
+#   upload --board mega
+#   build.bat --board nano
+#
+# [boards.mega]
+# fqbn = "arduino:avr:mega:cpu=atmega2560"
+#
+# [boards.nano]
+# fqbn = "arduino:avr:nano:cpu=atmega328"
+# baud = 9600

templates/basic/build.bat

@@ -6,20 +6,21 @@ setlocal enabledelayedexpansion
 :: Reads all settings from .anvil.toml. No Anvil binary required.
 ::
 :: Usage:
-::   build.bat              Compile (verify only)
+::   build.bat                Compile (verify only)
-::   build.bat --clean      Delete build cache first
+::   build.bat --board mega   Use a named board
-::   build.bat --verbose    Show full compiler output
+::   build.bat --clean        Delete build cache first
+::   build.bat --verbose      Show full compiler output
 
 set "SCRIPT_DIR=%~dp0"
-set "CONFIG=%SCRIPT_DIR%.anvil.toml"
+set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
+set "CONFIG=%SCRIPT_DIR%\.anvil.toml"
 
 if not exist "%CONFIG%" (
     echo FAIL: No .anvil.toml found in %SCRIPT_DIR%
     exit /b 1
 )
 
-:: -- Parse .anvil.toml ----------------------------------------------------
+:: -- Parse .anvil.toml (flat keys) ----------------------------------------
-:: Read file directly, skip comments and section headers
 for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
     set "_K=%%a"
     if not "!_K:~0,1!"=="#" if not "!_K:~0,1!"=="[" (
@@ -30,7 +31,7 @@ for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
             set "_V=!_V:"=!"
         )
         if "!_K!"=="name" set "SKETCH_NAME=!_V!"
-        if "!_K!"=="fqbn" set "FQBN=!_V!"
+        if "!_K!"=="default" set "DEFAULT_BOARD=!_V!"
         if "!_K!"=="warnings" set "WARNINGS=!_V!"
     )
 )
@@ -40,15 +41,17 @@ if "%SKETCH_NAME%"=="" (
     exit /b 1
 )
 
-set "SKETCH_DIR=%SCRIPT_DIR%%SKETCH_NAME%"
+set "SKETCH_DIR=%SCRIPT_DIR%\%SKETCH_NAME%"
-set "BUILD_DIR=%SCRIPT_DIR%.build"
+set "BUILD_DIR=%SCRIPT_DIR%\.build"
 
 :: -- Parse arguments ------------------------------------------------------
 set "DO_CLEAN=0"
 set "VERBOSE="
+set "BOARD_NAME="
 
 :parse_args
 if "%~1"=="" goto done_args
+if "%~1"=="--board" set "BOARD_NAME=%~2" & shift & shift & goto parse_args
 if "%~1"=="--clean" set "DO_CLEAN=1" & shift & goto parse_args
 if "%~1"=="--verbose" set "VERBOSE=--verbose" & shift & goto parse_args
 if "%~1"=="--help" goto show_help
@@ -57,12 +60,51 @@ echo FAIL: Unknown option: %~1
 exit /b 1
 
 :show_help
-echo Usage: build.bat [--clean] [--verbose]
+echo Usage: build.bat [--board NAME] [--clean] [--verbose]
 echo   Compiles the sketch. Settings from .anvil.toml.
+echo   --board NAME selects a board from [boards.NAME].
 exit /b 0
 
 :done_args
 
+:: -- Resolve board --------------------------------------------------------
+if "%BOARD_NAME%"=="" set "BOARD_NAME=%DEFAULT_BOARD%"
+
+set "BOARD_SECTION=[boards.%BOARD_NAME%]"
+set "IN_SECTION=0"
+set "FQBN="
+for /f "usebackq tokens=*" %%L in ("%CONFIG%") do (
+    set "_LINE=%%L"
+    if "!_LINE!"=="!BOARD_SECTION!" (
+        set "IN_SECTION=1"
+    ) else if "!IN_SECTION!"=="1" (
+        if "!_LINE:~0,1!"=="[" (
+            set "IN_SECTION=0"
+        ) else if not "!_LINE:~0,1!"=="#" (
+            for /f "tokens=1,* delims==" %%a in ("!_LINE!") do (
+                set "_BK=%%a"
+                set "_BK=!_BK: =!"
+                set "_BV=%%b"
+                if defined _BV (
+                    set "_BV=!_BV: =!"
+                    set "_BV=!_BV:"=!"
+                )
+                if "!_BK!"=="fqbn" set "FQBN=!_BV!"
+            )
+        )
+    )
+)
+
+if "!FQBN!"=="" (
+    echo FAIL: No board '%BOARD_NAME%' in .anvil.toml.
+    echo   Add it: anvil board --add %BOARD_NAME%
+    exit /b 1
+)
+
+if not "%BOARD_NAME%"=="%DEFAULT_BOARD%" (
+    echo ok   Using board: %BOARD_NAME% -- %FQBN%
+)
+
 :: -- Preflight ------------------------------------------------------------
 where arduino-cli >nul 2>nul
 if errorlevel 1 (
@@ -86,8 +128,8 @@ if "%DO_CLEAN%"=="1" (
 :: -- Build include flags --------------------------------------------------
 set "BUILD_FLAGS="
 for %%d in (lib\hal lib\app) do (
-    if exist "%SCRIPT_DIR%%%d" (
+    if exist "%SCRIPT_DIR%\%%d" (
-        set "BUILD_FLAGS=!BUILD_FLAGS! -I%SCRIPT_DIR%%%d"
+        set "BUILD_FLAGS=!BUILD_FLAGS! -I%SCRIPT_DIR%\%%d"
     )
 )
 set "BUILD_FLAGS=!BUILD_FLAGS! -Werror"
@@ -100,7 +142,7 @@ echo.
 
 if not exist "%BUILD_DIR%" mkdir "%BUILD_DIR%"
 
-arduino-cli compile --fqbn %FQBN% --build-path "%BUILD_DIR%" --warnings %WARNINGS% --build-property "build.extra_flags=%BUILD_FLAGS%" %VERBOSE% "%SKETCH_DIR%"
+arduino-cli compile --fqbn %FQBN% --build-path "%BUILD_DIR%" --warnings %WARNINGS% --build-property "compiler.cpp.extra_flags=%BUILD_FLAGS%" --build-property "compiler.c.extra_flags=%BUILD_FLAGS%" %VERBOSE% "%SKETCH_DIR%"
 if errorlevel 1 (
     echo.
     echo FAIL: Compilation failed.

templates/basic/build.sh

@@ -6,6 +6,7 @@
 #
 # Usage:
 #   ./build.sh              Compile (verify only)
+#   ./build.sh --board mega Use a named board
 #   ./build.sh --clean      Delete build cache first
 #   ./build.sh --verbose    Show full compiler output
 #
@@ -32,27 +33,34 @@ die()  { echo "${RED}FAIL${RST} $*" >&2; exit 1; }
 # -- Parse .anvil.toml -----------------------------------------------------
 [[ -f "$CONFIG" ]] || die "No .anvil.toml found in $SCRIPT_DIR"
 
-# Extract a simple string value: toml_get "key"
-# Searches the whole file; for sectioned keys, grep is specific enough
-# given our small, flat schema.
 toml_get() {
     (grep "^$1 " "$CONFIG" 2>/dev/null || true) | head -1 | sed 's/.*= *"\{0,1\}\([^"]*\)"\{0,1\}/\1/' | tr -d ' '
 }
 
-# Extract a TOML array as space-separated values: toml_array "key"
 toml_array() {
     (grep "^$1 " "$CONFIG" 2>/dev/null || true) | head -1 \
         | sed 's/.*\[//; s/\].*//; s/"//g; s/,/ /g' | tr -s ' '
 }
 
+toml_section_get() {
+    local section="$1" key="$2"
+    awk -v section="[$section]" -v key="$key" '
+        $0 == section { found=1; next }
+        /^\[/ { found=0 }
+        found && $1 == key && /=/ {
+            sub(/^[^=]*= *"?/, ""); sub(/"? *$/, ""); print; exit
+        }
+    ' "$CONFIG"
+}
+
 SKETCH_NAME="$(toml_get 'name')"
-FQBN="$(toml_get 'fqbn')"
+DEFAULT_BOARD="$(toml_get 'default')"
 WARNINGS="$(toml_get 'warnings')"
 INCLUDE_DIRS="$(toml_array 'include_dirs')"
 EXTRA_FLAGS="$(toml_array 'extra_flags')"
 
-[[ -n "$SKETCH_NAME" ]] || die "Could not read project name from .anvil.toml"
+[[ -n "$SKETCH_NAME" ]]  || die "Could not read project name from .anvil.toml"
-[[ -n "$FQBN" ]]        || die "Could not read fqbn from .anvil.toml"
+[[ -n "$DEFAULT_BOARD" ]] || die "Could not read default board from .anvil.toml"
 
 SKETCH_DIR="$SCRIPT_DIR/$SKETCH_NAME"
 BUILD_DIR="$SCRIPT_DIR/.build"
@@ -60,20 +68,35 @@ BUILD_DIR="$SCRIPT_DIR/.build"
 # -- Parse arguments -------------------------------------------------------
 DO_CLEAN=0
 VERBOSE=""
+BOARD_NAME=""
 
-for arg in "$@"; do
+while [[ $# -gt 0 ]]; do
-    case "$arg" in
+    case "$1" in
-        --clean)   DO_CLEAN=1 ;;
+        --board)   BOARD_NAME="$2"; shift 2 ;;
-        --verbose) VERBOSE="--verbose" ;;
+        --clean)   DO_CLEAN=1; shift ;;
+        --verbose) VERBOSE="--verbose"; shift ;;
         -h|--help)
-            echo "Usage: ./build.sh [--clean] [--verbose]"
+            echo "Usage: ./build.sh [--board NAME] [--clean] [--verbose]"
             echo "  Compiles the sketch. Settings from .anvil.toml."
+            echo "  --board NAME selects a board from [boards.NAME]."
             exit 0
             ;;
-        *) die "Unknown option: $arg" ;;
+        *) die "Unknown option: $1" ;;
     esac
 done
 
+# -- Resolve board ---------------------------------------------------------
+ACTIVE_BOARD="${BOARD_NAME:-$DEFAULT_BOARD}"
+FQBN="$(toml_section_get "boards.$ACTIVE_BOARD" "fqbn")"
+
+if [[ -z "$FQBN" ]]; then
+    die "No board '$ACTIVE_BOARD' in .anvil.toml.\n  Add it: anvil board --add $ACTIVE_BOARD"
+fi
+
+if [[ -n "$BOARD_NAME" ]]; then
+    ok "Using board: $BOARD_NAME ($FQBN)"
+fi
+
 # -- Preflight -------------------------------------------------------------
 command -v arduino-cli &>/dev/null \
     || die "arduino-cli not found in PATH. Install it first."
@@ -121,7 +144,8 @@ COMPILE_ARGS=(
 )
 
 if [[ -n "$BUILD_FLAGS" ]]; then
-    COMPILE_ARGS+=(--build-property "build.extra_flags=$BUILD_FLAGS")
+    COMPILE_ARGS+=(--build-property "compiler.cpp.extra_flags=$BUILD_FLAGS")
+    COMPILE_ARGS+=(--build-property "compiler.c.extra_flags=$BUILD_FLAGS")
 fi
 
 if [[ -n "$VERBOSE" ]]; then

templates/basic/monitor.bat

@@ -9,17 +9,19 @@ setlocal enabledelayedexpansion
 ::   monitor.bat                Open monitor (auto-detect port)
 ::   monitor.bat -p COM3       Specify port
 ::   monitor.bat -b 9600       Override baud rate
+::   monitor.bat --board mega  Use baud from a named board
 
 set "SCRIPT_DIR=%~dp0"
-set "CONFIG=%SCRIPT_DIR%.anvil.toml"
+set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
-set "LOCAL_CONFIG=%SCRIPT_DIR%.anvil.local"
+set "CONFIG=%SCRIPT_DIR%\.anvil.toml"
+set "LOCAL_CONFIG=%SCRIPT_DIR%\.anvil.local"
 
 if not exist "%CONFIG%" (
     echo FAIL: No .anvil.toml found in %SCRIPT_DIR%
     exit /b 1
 )
 
-:: -- Parse .anvil.toml ----------------------------------------------------
+:: -- Parse .anvil.toml (flat keys) ----------------------------------------
 for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
     set "_K=%%a"
     if not "!_K:~0,1!"=="#" if not "!_K:~0,1!"=="[" (
@@ -29,11 +31,12 @@ for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
             set "_V=!_V: =!"
             set "_V=!_V:"=!"
         )
+        if "!_K!"=="default" set "DEFAULT_BOARD=!_V!"
         if "!_K!"=="baud" set "BAUD=!_V!"
     )
 )
 
-:: -- Parse .anvil.local (machine-specific, not in git) --------------------
+:: -- Parse .anvil.local ---------------------------------------------------
 set "LOCAL_PORT="
 set "LOCAL_VID_PID="
 if exist "%LOCAL_CONFIG%" (
@@ -56,6 +59,7 @@ if "%BAUD%"=="" set "BAUD=115200"
 
 :: -- Parse arguments ------------------------------------------------------
 set "PORT="
+set "BOARD_NAME="
 
 :parse_args
 if "%~1"=="" goto done_args
@@ -63,18 +67,54 @@ if "%~1"=="-p" set "PORT=%~2" & shift & shift & goto parse_args
 if "%~1"=="--port" set "PORT=%~2" & shift & shift & goto parse_args
 if "%~1"=="-b" set "BAUD=%~2" & shift & shift & goto parse_args
 if "%~1"=="--baud" set "BAUD=%~2" & shift & shift & goto parse_args
+if "%~1"=="--board" set "BOARD_NAME=%~2" & shift & shift & goto parse_args
 if "%~1"=="--help" goto show_help
 if "%~1"=="-h" goto show_help
 echo FAIL: Unknown option: %~1
 exit /b 1
 
 :show_help
-echo Usage: monitor.bat [-p PORT] [-b BAUD]
+echo Usage: monitor.bat [-p PORT] [-b BAUD] [--board NAME]
 echo   Opens serial monitor. Baud rate from .anvil.toml.
+echo   --board NAME selects a board from [boards.NAME].
 exit /b 0
 
 :done_args
 
+:: -- Resolve board --------------------------------------------------------
+if "%BOARD_NAME%"=="" set "BOARD_NAME=%DEFAULT_BOARD%"
+
+set "BOARD_SECTION=[boards.%BOARD_NAME%]"
+set "IN_SECTION=0"
+set "BOARD_BAUD="
+for /f "usebackq tokens=*" %%L in ("%CONFIG%") do (
+    set "_LINE=%%L"
+    if "!_LINE!"=="!BOARD_SECTION!" (
+        set "IN_SECTION=1"
+    ) else if "!IN_SECTION!"=="1" (
+        if "!_LINE:~0,1!"=="[" (
+            set "IN_SECTION=0"
+        ) else if not "!_LINE:~0,1!"=="#" (
+            for /f "tokens=1,* delims==" %%a in ("!_LINE!") do (
+                set "_BK=%%a"
+                set "_BK=!_BK: =!"
+                set "_BV=%%b"
+                if defined _BV (
+                    set "_BV=!_BV: =!"
+                    set "_BV=!_BV:"=!"
+                )
+                if "!_BK!"=="baud" set "BOARD_BAUD=!_BV!"
+            )
+        )
+    )
+)
+
+if not "!BOARD_BAUD!"=="" set "BAUD=!BOARD_BAUD!"
+
+if not "%BOARD_NAME%"=="%DEFAULT_BOARD%" (
+    echo ok   Using board: %BOARD_NAME% -- baud: !BAUD!
+)
+
 :: -- Preflight ------------------------------------------------------------
 where arduino-cli >nul 2>nul
 if errorlevel 1 (
@@ -85,7 +125,7 @@ if errorlevel 1 (
 :: -- Resolve port ---------------------------------------------------------
 :: Priority: -p flag > VID:PID resolve > saved port > auto-detect
 if "%PORT%"=="" (
-    for /f "delims=" %%p in ('powershell -NoProfile -ExecutionPolicy Bypass -File "%SCRIPT_DIR%_detect_port.ps1" -VidPid "%LOCAL_VID_PID%" -SavedPort "%LOCAL_PORT%"') do (
+    for /f "delims=" %%p in ('powershell -NoProfile -ExecutionPolicy Bypass -File "%SCRIPT_DIR%\_detect_port.ps1" -VidPid "%LOCAL_VID_PID%" -SavedPort "%LOCAL_PORT%"') do (
         if "!PORT!"=="" set "PORT=%%p"
     )
     if "!PORT!"=="" (

templates/basic/monitor.sh

@@ -8,6 +8,7 @@
 #   ./monitor.sh                    Auto-detect port
 #   ./monitor.sh -p /dev/ttyUSB0    Specify port
 #   ./monitor.sh -b 9600            Override baud rate
+#   ./monitor.sh --board mega       Use baud from a named board
 #   ./monitor.sh --watch            Reconnect after reset/replug
 #
 # Prerequisites: arduino-cli in PATH
@@ -25,6 +26,7 @@ else
     RED=''; GRN=''; YLW=''; CYN=''; BLD=''; RST=''
 fi
 
+ok()   { echo "${GRN}ok${RST}   $*"; }
 warn() { echo "${YLW}warn${RST} $*"; }
 die()  { echo "${RED}FAIL${RST} $*" >&2; exit 1; }
 
@@ -35,6 +37,18 @@ toml_get() {
     (grep "^$1 " "$CONFIG" 2>/dev/null || true) | head -1 | sed 's/.*= *"\{0,1\}\([^"]*\)"\{0,1\}/\1/' | tr -d ' '
 }
 
+toml_section_get() {
+    local section="$1" key="$2"
+    awk -v section="[$section]" -v key="$key" '
+        $0 == section { found=1; next }
+        /^\[/ { found=0 }
+        found && $1 == key && /=/ {
+            sub(/^[^=]*= *"?/, ""); sub(/"? *$/, ""); print; exit
+        }
+    ' "$CONFIG"
+}
+
+DEFAULT_BOARD="$(toml_get 'default')"
 BAUD="$(toml_get 'baud')"
 BAUD="${BAUD:-115200}"
 LOCAL_CONFIG="$SCRIPT_DIR/.anvil.local"
@@ -48,28 +62,41 @@ fi
 # -- Parse arguments -------------------------------------------------------
 PORT=""
 DO_WATCH=0
+BOARD_NAME=""
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
         -p|--port)  PORT="$2"; shift 2 ;;
         -b|--baud)  BAUD="$2"; shift 2 ;;
+        --board)    BOARD_NAME="$2"; shift 2 ;;
         --watch)    DO_WATCH=1; shift ;;
         -h|--help)
-            echo "Usage: ./monitor.sh [-p PORT] [-b BAUD] [--watch]"
+            echo "Usage: ./monitor.sh [-p PORT] [-b BAUD] [--board NAME] [--watch]"
             echo "  Opens serial monitor. Baud rate from .anvil.toml."
+            echo "  --board NAME selects a board from [boards.NAME]."
             exit 0
             ;;
         *) die "Unknown option: $1" ;;
     esac
 done
 
+# -- Resolve board ---------------------------------------------------------
+ACTIVE_BOARD="${BOARD_NAME:-$DEFAULT_BOARD}"
+BOARD_BAUD="$(toml_section_get "boards.$ACTIVE_BOARD" "baud")"
+if [[ -n "$BOARD_BAUD" ]]; then
+    BAUD="$BOARD_BAUD"
+fi
+
+if [[ -n "$BOARD_NAME" ]]; then
+    ok "Using board: $BOARD_NAME (baud: $BAUD)"
+fi
+
 # -- Preflight -------------------------------------------------------------
 command -v arduino-cli &>/dev/null \
     || die "arduino-cli not found in PATH."
 
 # -- Auto-detect port ------------------------------------------------------
 auto_detect() {
-    # Prefer ttyUSB/ttyACM (real USB devices) over ttyS (hardware UART)
     local port
     port=$(arduino-cli board list 2>/dev/null \
         | grep -i "serial" \
@@ -77,7 +104,6 @@ auto_detect() {
         | grep -E 'ttyUSB|ttyACM|COM' \
         | head -1)
 
-    # Fallback: any serial port
     if [[ -z "$port" ]]; then
         port=$(arduino-cli board list 2>/dev/null \
             | grep -i "serial" \
@@ -88,7 +114,6 @@ auto_detect() {
     echo "$port"
 }
 
-# resolve_vid_pid VID:PID -- search arduino-cli JSON for matching device
 resolve_vid_pid() {
     local target_vid target_pid json
     target_vid="$(echo "$1" | cut -d: -f1 | tr '[:upper:]' '[:lower:]')"
@@ -113,7 +138,6 @@ except: pass
 }
 
 if [[ -z "$PORT" ]]; then
-    # Try VID:PID resolution first
     if [[ -n "$LOCAL_VID_PID" ]]; then
         PORT="$(resolve_vid_pid "$LOCAL_VID_PID")"
         if [[ -n "$PORT" ]]; then
@@ -125,13 +149,11 @@ if [[ -z "$PORT" ]]; then
         fi
     fi
 
-    # Fall back to saved port
     if [[ -z "$PORT" ]] && [[ -n "$LOCAL_PORT" ]]; then
         PORT="$LOCAL_PORT"
         warn "Using port $PORT (from .anvil.local)"
     fi
 
-    # Fall back to auto-detect
     if [[ -z "$PORT" ]]; then
         PORT="$(auto_detect)"
 

templates/basic/upload.bat

@@ -8,20 +8,22 @@ setlocal enabledelayedexpansion
 :: Usage:
 ::   upload.bat                     Auto-detect port, compile + upload
 ::   upload.bat -p COM3             Specify port
+::   upload.bat --board mega        Use a named board
 ::   upload.bat --monitor           Open serial monitor after upload
 ::   upload.bat --clean             Clean build cache first
 ::   upload.bat --verbose           Full compiler + avrdude output
 
 set "SCRIPT_DIR=%~dp0"
-set "CONFIG=%SCRIPT_DIR%.anvil.toml"
+set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
-set "LOCAL_CONFIG=%SCRIPT_DIR%.anvil.local"
+set "CONFIG=%SCRIPT_DIR%\.anvil.toml"
+set "LOCAL_CONFIG=%SCRIPT_DIR%\.anvil.local"
 
 if not exist "%CONFIG%" (
     echo FAIL: No .anvil.toml found in %SCRIPT_DIR%
     exit /b 1
 )
 
-:: -- Parse .anvil.toml ----------------------------------------------------
+:: -- Parse .anvil.toml (flat keys) ----------------------------------------
 for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
     set "_K=%%a"
     if not "!_K:~0,1!"=="#" if not "!_K:~0,1!"=="[" (
@@ -32,13 +34,13 @@ for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
             set "_V=!_V:"=!"
         )
         if "!_K!"=="name" set "SKETCH_NAME=!_V!"
-        if "!_K!"=="fqbn" set "FQBN=!_V!"
+        if "!_K!"=="default" set "DEFAULT_BOARD=!_V!"
         if "!_K!"=="warnings" set "WARNINGS=!_V!"
         if "!_K!"=="baud" set "BAUD=!_V!"
     )
 )
 
-:: -- Parse .anvil.local (machine-specific, not in git) --------------------
+:: -- Parse .anvil.local ---------------------------------------------------
 set "LOCAL_PORT="
 set "LOCAL_VID_PID="
 if exist "%LOCAL_CONFIG%" (
@@ -63,19 +65,21 @@ if "%SKETCH_NAME%"=="" (
 )
 if "%BAUD%"=="" set "BAUD=115200"
 
-set "SKETCH_DIR=%SCRIPT_DIR%%SKETCH_NAME%"
+set "SKETCH_DIR=%SCRIPT_DIR%\%SKETCH_NAME%"
-set "BUILD_DIR=%SCRIPT_DIR%.build"
+set "BUILD_DIR=%SCRIPT_DIR%\.build"
 
 :: -- Parse arguments ------------------------------------------------------
 set "PORT="
 set "DO_MONITOR=0"
 set "DO_CLEAN=0"
 set "VERBOSE="
+set "BOARD_NAME="
 
 :parse_args
 if "%~1"=="" goto done_args
 if "%~1"=="-p" set "PORT=%~2" & shift & shift & goto parse_args
 if "%~1"=="--port" set "PORT=%~2" & shift & shift & goto parse_args
+if "%~1"=="--board" set "BOARD_NAME=%~2" & shift & shift & goto parse_args
 if "%~1"=="--monitor" set "DO_MONITOR=1" & shift & goto parse_args
 if "%~1"=="--clean" set "DO_CLEAN=1" & shift & goto parse_args
 if "%~1"=="--verbose" set "VERBOSE=--verbose" & shift & goto parse_args
@@ -85,12 +89,54 @@ echo FAIL: Unknown option: %~1
 exit /b 1
 
 :show_help
-echo Usage: upload.bat [-p PORT] [--monitor] [--clean] [--verbose]
+echo Usage: upload.bat [-p PORT] [--board NAME] [--monitor] [--clean] [--verbose]
 echo   Compiles and uploads the sketch. Settings from .anvil.toml.
+echo   --board NAME selects a board from [boards.NAME].
 exit /b 0
 
 :done_args
 
+:: -- Resolve board --------------------------------------------------------
+if "%BOARD_NAME%"=="" set "BOARD_NAME=%DEFAULT_BOARD%"
+
+set "BOARD_SECTION=[boards.%BOARD_NAME%]"
+set "IN_SECTION=0"
+set "FQBN="
+set "BOARD_BAUD="
+for /f "usebackq tokens=*" %%L in ("%CONFIG%") do (
+    set "_LINE=%%L"
+    if "!_LINE!"=="!BOARD_SECTION!" (
+        set "IN_SECTION=1"
+    ) else if "!IN_SECTION!"=="1" (
+        if "!_LINE:~0,1!"=="[" (
+            set "IN_SECTION=0"
+        ) else if not "!_LINE:~0,1!"=="#" (
+            for /f "tokens=1,* delims==" %%a in ("!_LINE!") do (
+                set "_BK=%%a"
+                set "_BK=!_BK: =!"
+                set "_BV=%%b"
+                if defined _BV (
+                    set "_BV=!_BV: =!"
+                    set "_BV=!_BV:"=!"
+                )
+                if "!_BK!"=="fqbn" set "FQBN=!_BV!"
+                if "!_BK!"=="baud" set "BOARD_BAUD=!_BV!"
+            )
+        )
+    )
+)
+
+if "!FQBN!"=="" (
+    echo FAIL: No board '%BOARD_NAME%' in .anvil.toml.
+    echo   Add it: anvil board --add %BOARD_NAME%
+    exit /b 1
+)
+if not "!BOARD_BAUD!"=="" set "BAUD=!BOARD_BAUD!"
+
+if not "%BOARD_NAME%"=="%DEFAULT_BOARD%" (
+    echo ok   Using board: %BOARD_NAME% -- !FQBN!
+)
+
 :: -- Preflight ------------------------------------------------------------
 where arduino-cli >nul 2>nul
 if errorlevel 1 (
@@ -101,7 +147,7 @@ if errorlevel 1 (
 :: -- Resolve port ---------------------------------------------------------
 :: Priority: -p flag > VID:PID resolve > saved port > auto-detect
 if "%PORT%"=="" (
-    for /f "delims=" %%p in ('powershell -NoProfile -ExecutionPolicy Bypass -File "%SCRIPT_DIR%_detect_port.ps1" -VidPid "%LOCAL_VID_PID%" -SavedPort "%LOCAL_PORT%"') do (
+    for /f "delims=" %%p in ('powershell -NoProfile -ExecutionPolicy Bypass -File "%SCRIPT_DIR%\_detect_port.ps1" -VidPid "%LOCAL_VID_PID%" -SavedPort "%LOCAL_PORT%"') do (
         if "!PORT!"=="" set "PORT=%%p"
     )
     if "!PORT!"=="" (
@@ -131,8 +177,8 @@ if "%DO_CLEAN%"=="1" (
 :: -- Build include flags --------------------------------------------------
 set "BUILD_FLAGS="
 for %%d in (lib\hal lib\app) do (
-    if exist "%SCRIPT_DIR%%%d" (
+    if exist "%SCRIPT_DIR%\%%d" (
-        set "BUILD_FLAGS=!BUILD_FLAGS! -I%SCRIPT_DIR%%%d"
+        set "BUILD_FLAGS=!BUILD_FLAGS! -I%SCRIPT_DIR%\%%d"
     )
 )
 set "BUILD_FLAGS=!BUILD_FLAGS! -Werror"
@@ -141,7 +187,7 @@ set "BUILD_FLAGS=!BUILD_FLAGS! -Werror"
 echo Compiling %SKETCH_NAME%...
 if not exist "%BUILD_DIR%" mkdir "%BUILD_DIR%"
 
-arduino-cli compile --fqbn %FQBN% --build-path "%BUILD_DIR%" --warnings %WARNINGS% --build-property "build.extra_flags=%BUILD_FLAGS%" %VERBOSE% "%SKETCH_DIR%"
+arduino-cli compile --fqbn %FQBN% --build-path "%BUILD_DIR%" --warnings %WARNINGS% --build-property "compiler.cpp.extra_flags=%BUILD_FLAGS%" --build-property "compiler.c.extra_flags=%BUILD_FLAGS%" %VERBOSE% "%SKETCH_DIR%"
 if errorlevel 1 (
     echo FAIL: Compilation failed.
     exit /b 1

templates/basic/upload.sh

@@ -7,6 +7,7 @@
 # Usage:
 #   ./upload.sh                     Auto-detect port, compile + upload
 #   ./upload.sh -p /dev/ttyUSB0     Specify port
+#   ./upload.sh --board mega        Use a named board
 #   ./upload.sh --monitor           Open serial monitor after upload
 #   ./upload.sh --clean             Clean build cache first
 #   ./upload.sh --verbose           Full compiler + avrdude output
@@ -42,15 +43,26 @@ toml_array() {
         | sed 's/.*\[//; s/\].*//; s/"//g; s/,/ /g' | tr -s ' '
 }
 
+toml_section_get() {
+    local section="$1" key="$2"
+    awk -v section="[$section]" -v key="$key" '
+        $0 == section { found=1; next }
+        /^\[/ { found=0 }
+        found && $1 == key && /=/ {
+            sub(/^[^=]*= *"?/, ""); sub(/"? *$/, ""); print; exit
+        }
+    ' "$CONFIG"
+}
+
 SKETCH_NAME="$(toml_get 'name')"
-FQBN="$(toml_get 'fqbn')"
+DEFAULT_BOARD="$(toml_get 'default')"
 WARNINGS="$(toml_get 'warnings')"
 INCLUDE_DIRS="$(toml_array 'include_dirs')"
 EXTRA_FLAGS="$(toml_array 'extra_flags')"
 BAUD="$(toml_get 'baud')"
 
-[[ -n "$SKETCH_NAME" ]] || die "Could not read project name from .anvil.toml"
+[[ -n "$SKETCH_NAME" ]]  || die "Could not read project name from .anvil.toml"
-[[ -n "$FQBN" ]]        || die "Could not read fqbn from .anvil.toml"
+[[ -n "$DEFAULT_BOARD" ]] || die "Could not read default board from .anvil.toml"
 
 BAUD="${BAUD:-115200}"
 LOCAL_CONFIG="$SCRIPT_DIR/.anvil.local"
@@ -68,22 +80,42 @@ PORT=""
 DO_MONITOR=0
 DO_CLEAN=0
 VERBOSE=""
+BOARD_NAME=""
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
         -p|--port)    PORT="$2"; shift 2 ;;
+        --board)      BOARD_NAME="$2"; shift 2 ;;
         --monitor)    DO_MONITOR=1; shift ;;
         --clean)      DO_CLEAN=1; shift ;;
         --verbose)    VERBOSE="--verbose"; shift ;;
         -h|--help)
-            echo "Usage: ./upload.sh [-p PORT] [--monitor] [--clean] [--verbose]"
+            echo "Usage: ./upload.sh [-p PORT] [--board NAME] [--monitor] [--clean] [--verbose]"
             echo "  Compiles and uploads the sketch. Settings from .anvil.toml."
+            echo "  --board NAME selects a board from [boards.NAME]."
             exit 0
             ;;
         *) die "Unknown option: $1" ;;
     esac
 done
 
+# -- Resolve board ---------------------------------------------------------
+ACTIVE_BOARD="${BOARD_NAME:-$DEFAULT_BOARD}"
+FQBN="$(toml_section_get "boards.$ACTIVE_BOARD" "fqbn")"
+
+if [[ -z "$FQBN" ]]; then
+    die "No board '$ACTIVE_BOARD' in .anvil.toml.\n  Add it: anvil board --add $ACTIVE_BOARD"
+fi
+
+BOARD_BAUD="$(toml_section_get "boards.$ACTIVE_BOARD" "baud")"
+if [[ -n "$BOARD_BAUD" ]]; then
+    BAUD="$BOARD_BAUD"
+fi
+
+if [[ -n "$BOARD_NAME" ]]; then
+    ok "Using board: $BOARD_NAME ($FQBN)"
+fi
+
 # -- Preflight -------------------------------------------------------------
 command -v arduino-cli &>/dev/null \
     || die "arduino-cli not found in PATH."
@@ -94,13 +126,11 @@ command -v arduino-cli &>/dev/null \
 # -- Resolve port ----------------------------------------------------------
 # Priority: -p flag > VID:PID resolve > saved port > auto-detect
 
-# resolve_vid_pid VID:PID -- search arduino-cli JSON for matching device
 resolve_vid_pid() {
     local target_vid target_pid json
     target_vid="$(echo "$1" | cut -d: -f1 | tr '[:upper:]' '[:lower:]')"
     target_pid="$(echo "$1" | cut -d: -f2 | tr '[:upper:]' '[:lower:]')"
     json="$(arduino-cli board list --format json 2>/dev/null)" || return
-    # Walk through JSON looking for matching vid/pid on serial ports
     echo "$json" | python3 -c "
 import sys, json
 try:
@@ -120,7 +150,6 @@ except: pass
 }
 
 if [[ -z "$PORT" ]]; then
-    # Try VID:PID resolution first
     if [[ -n "$LOCAL_VID_PID" ]]; then
         PORT="$(resolve_vid_pid "$LOCAL_VID_PID")"
         if [[ -n "$PORT" ]]; then
@@ -132,13 +161,11 @@ if [[ -z "$PORT" ]]; then
         fi
     fi
 
-    # Fall back to saved port
     if [[ -z "$PORT" ]] && [[ -n "$LOCAL_PORT" ]]; then
         PORT="$LOCAL_PORT"
         warn "Using port $PORT (from .anvil.local)"
     fi
 
-    # Fall back to auto-detect
     if [[ -z "$PORT" ]]; then
         PORT=$(arduino-cli board list 2>/dev/null \
             | grep -i "serial" \
@@ -191,7 +218,8 @@ COMPILE_ARGS=(
 )
 
 if [[ -n "$BUILD_FLAGS" ]]; then
-    COMPILE_ARGS+=(--build-property "build.extra_flags=$BUILD_FLAGS")
+    COMPILE_ARGS+=(--build-property "compiler.cpp.extra_flags=$BUILD_FLAGS")
+    COMPILE_ARGS+=(--build-property "compiler.c.extra_flags=$BUILD_FLAGS")
 fi
 
 [[ -n "$VERBOSE" ]] && COMPILE_ARGS+=("$VERBOSE")

tests/integration_test.rs

@@ -15,6 +15,7 @@ fn test_basic_template_extracts_all_expected_files() {
     let ctx = TemplateContext {
         project_name: "test_proj".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -29,6 +30,7 @@ fn test_template_creates_sketch_directory() {
     let ctx = TemplateContext {
         project_name: "blink".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -59,6 +61,7 @@ fn test_template_creates_hal_files() {
     let ctx = TemplateContext {
         project_name: "sensor".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -92,6 +95,7 @@ fn test_template_creates_app_header() {
     let ctx = TemplateContext {
         project_name: "my_sensor".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -118,6 +122,7 @@ fn test_template_creates_test_infrastructure() {
     let ctx = TemplateContext {
         project_name: "blink".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -156,6 +161,7 @@ fn test_template_test_file_references_correct_app() {
     let ctx = TemplateContext {
         project_name: "motor_ctrl".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -177,6 +183,7 @@ fn test_template_cmake_references_correct_project() {
     let ctx = TemplateContext {
         project_name: "my_bot".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -198,6 +205,7 @@ fn test_template_creates_dot_files() {
     let ctx = TemplateContext {
         project_name: "blink".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -228,6 +236,7 @@ fn test_template_creates_readme() {
     let ctx = TemplateContext {
         project_name: "blink".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -251,6 +260,7 @@ fn test_template_creates_valid_config() {
     let ctx = TemplateContext {
         project_name: "blink".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -260,7 +270,7 @@ fn test_template_creates_valid_config() {
     // Should be loadable by ProjectConfig
     let config = ProjectConfig::load(tmp.path()).unwrap();
     assert_eq!(config.project.name, "blink");
-    assert_eq!(config.build.fqbn, "arduino:avr:uno");
+    assert_eq!(config.build.default, "uno");
     assert_eq!(config.monitor.baud, 115200);
     assert!(config.build.extra_flags.contains(&"-Werror".to_string()));
 }
@@ -273,7 +283,7 @@ fn test_config_roundtrip() {
 
     let loaded = ProjectConfig::load(tmp.path()).unwrap();
     assert_eq!(loaded.project.name, "roundtrip_test");
-    assert_eq!(loaded.build.fqbn, config.build.fqbn);
+    assert_eq!(loaded.build.default, config.build.default);
     assert_eq!(loaded.monitor.baud, config.monitor.baud);
     assert_eq!(loaded.build.include_dirs, config.build.include_dirs);
 }
@@ -332,6 +342,7 @@ fn test_full_project_structure() {
     let ctx = TemplateContext {
         project_name: "full_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -383,6 +394,7 @@ fn test_no_unicode_in_template_output() {
     let ctx = TemplateContext {
         project_name: "ascii_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -432,6 +444,7 @@ fn test_unknown_template_fails() {
     let ctx = TemplateContext {
         project_name: "test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -457,6 +470,7 @@ fn test_template_creates_self_contained_scripts() {
     let ctx = TemplateContext {
         project_name: "standalone".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -481,6 +495,7 @@ fn test_build_sh_reads_anvil_toml() {
     let ctx = TemplateContext {
         project_name: "toml_reader".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -508,6 +523,7 @@ fn test_upload_sh_reads_anvil_toml() {
     let ctx = TemplateContext {
         project_name: "uploader".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -543,6 +559,7 @@ fn test_monitor_sh_reads_anvil_toml() {
     let ctx = TemplateContext {
         project_name: "serial_mon".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -570,6 +587,7 @@ fn test_scripts_have_shebangs() {
     let ctx = TemplateContext {
         project_name: "shebangs".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -594,6 +612,7 @@ fn test_scripts_no_anvil_binary_dependency() {
     let ctx = TemplateContext {
         project_name: "no_anvil_dep".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -643,6 +662,7 @@ fn test_gitignore_excludes_build_cache() {
     let ctx = TemplateContext {
         project_name: "gitcheck".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -670,6 +690,7 @@ fn test_readme_documents_self_contained_workflow() {
     let ctx = TemplateContext {
         project_name: "docs_check".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -705,6 +726,7 @@ fn test_scripts_tolerate_missing_toml_keys() {
     let ctx = TemplateContext {
         project_name: "grep_safe".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -742,6 +764,7 @@ fn test_bat_scripts_no_unescaped_parens_in_echo() {
     let ctx = TemplateContext {
         project_name: "parens_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -803,6 +826,7 @@ fn test_scripts_read_anvil_local_for_port() {
     let ctx = TemplateContext {
         project_name: "local_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -825,6 +849,7 @@ fn test_anvil_toml_template_has_no_port() {
     let ctx = TemplateContext {
         project_name: "no_port".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -856,6 +881,7 @@ fn test_bat_scripts_call_detect_port_ps1() {
     let ctx = TemplateContext {
         project_name: "ps1_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -878,6 +904,7 @@ fn test_detect_port_ps1_is_valid() {
     let ctx = TemplateContext {
         project_name: "ps1_valid".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -910,6 +937,7 @@ fn test_refresh_freshly_extracted_is_up_to_date() {
     let ctx = TemplateContext {
         project_name: "fresh_proj".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -940,6 +968,7 @@ fn test_refresh_detects_modified_script() {
     let ctx = TemplateContext {
         project_name: "mod_proj".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -1009,6 +1038,7 @@ fn test_scripts_read_vid_pid_from_anvil_local() {
     let ctx = TemplateContext {
         project_name: "vidpid_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
         fqbn: "arduino:avr:uno".to_string(),
         baud: 115200,
     };
@@ -1035,6 +1065,7 @@ fn test_board_preset_fqbn_in_config() {
     let ctx = TemplateContext {
         project_name: "mega_test".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "mega".to_string(),
         fqbn: "arduino:avr:mega:cpu=atmega2560".to_string(),
         baud: 115200,
     };
@@ -1042,7 +1073,7 @@ fn test_board_preset_fqbn_in_config() {
 
     let config = ProjectConfig::load(tmp.path()).unwrap();
     assert_eq!(
-        config.build.fqbn, "arduino:avr:mega:cpu=atmega2560",
+        config.build.default, "mega",
         ".anvil.toml should contain mega FQBN"
     );
 }
@@ -1054,12 +1085,113 @@ fn test_board_preset_custom_fqbn_in_config() {
     let ctx = TemplateContext {
         project_name: "custom_board".to_string(),
         anvil_version: "1.0.0".to_string(),
+        board_name: "esp".to_string(),
         fqbn: "esp32:esp32:esp32".to_string(),
         baud: 9600,
     };
     TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
 
     let config = ProjectConfig::load(tmp.path()).unwrap();
-    assert_eq!(config.build.fqbn, "esp32:esp32:esp32");
+    assert_eq!(config.build.default, "esp");
     assert_eq!(config.monitor.baud, 9600);
 }
+
+// ==========================================================================
+// Multi-board profile tests
+// ==========================================================================
+
+#[test]
+fn test_scripts_accept_board_flag() {
+    // All build/upload/monitor scripts should accept --board
+    let tmp = TempDir::new().unwrap();
+    let ctx = TemplateContext {
+        project_name: "multi_test".to_string(),
+        anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
+        fqbn: "arduino:avr:uno".to_string(),
+        baud: 115200,
+    };
+    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
+
+    let scripts = vec![
+        "build.sh", "build.bat",
+        "upload.sh", "upload.bat",
+        "monitor.sh", "monitor.bat",
+    ];
+
+    for script in &scripts {
+        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
+        assert!(
+            content.contains("--board"),
+            "{} should accept --board flag",
+            script
+        );
+    }
+}
+
+#[test]
+fn test_sh_scripts_have_toml_section_get() {
+    // Shell scripts need section-aware TOML parsing for board profiles
+    let tmp = TempDir::new().unwrap();
+    let ctx = TemplateContext {
+        project_name: "section_test".to_string(),
+        anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
+        fqbn: "arduino:avr:uno".to_string(),
+        baud: 115200,
+    };
+    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
+
+    for script in &["build.sh", "upload.sh", "monitor.sh"] {
+        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
+        assert!(
+            content.contains("toml_section_get"),
+            "{} should have toml_section_get function for board profiles",
+            script
+        );
+    }
+}
+
+#[test]
+fn test_bat_scripts_have_section_parser() {
+    // Batch scripts need section-aware TOML parsing for board profiles
+    let tmp = TempDir::new().unwrap();
+    let ctx = TemplateContext {
+        project_name: "bat_section".to_string(),
+        anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
+        fqbn: "arduino:avr:uno".to_string(),
+        baud: 115200,
+    };
+    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
+
+    for bat in &["build.bat", "upload.bat", "monitor.bat"] {
+        let content = fs::read_to_string(tmp.path().join(bat)).unwrap();
+        assert!(
+            content.contains("BOARD_SECTION") || content.contains("IN_SECTION"),
+            "{} should have section parser for board profiles",
+            bat
+        );
+    }
+}
+
+#[test]
+fn test_toml_template_has_board_profile_comments() {
+    // The generated .anvil.toml should include commented examples
+    // showing how to add board profiles
+    let tmp = TempDir::new().unwrap();
+    let ctx = TemplateContext {
+        project_name: "comment_test".to_string(),
+        anvil_version: "1.0.0".to_string(),
+        board_name: "uno".to_string(),
+        fqbn: "arduino:avr:uno".to_string(),
+        baud: 115200,
+    };
+    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
+
+    let content = fs::read_to_string(tmp.path().join(".anvil.toml")).unwrap();
+    assert!(
+        content.contains("[boards.mega]") || content.contains("boards.mega"),
+        ".anvil.toml should show board profile examples in comments"
+    );
+}