install.ps1

#Requires -Version 5.1
<#
.SYNOPSIS
    Install Claude Code rules, agents, and skills.

.DESCRIPTION
    Copies common rules, language-specific rules, agents, and skills into ~/.claude/.

.PARAMETER Languages
    One or more language names (e.g., golang, java, terraform).

.PARAMETER All
    Install all available language rules.

.EXAMPLE
    .\install.ps1 golang
    .\install.ps1 golang java terraform
    .\install.ps1 -All
#>
param(
    [Parameter(Position = 0, ValueFromRemainingArguments = $true)]
    [string[]]$Languages,

    [switch]$All
)

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$RulesDir = Join-Path $ScriptDir 'rules'
$AgentsDir = Join-Path $ScriptDir 'agents'
$SkillsDir = Join-Path $ScriptDir 'skills'
$DestDir = Join-Path $HOME '.claude' 'rules'

# Discover available languages (subdirs of rules/ excluding common)
$AvailableLanguages = Get-ChildItem -Path $RulesDir -Directory |
    Where-Object { $_.Name -ne 'common' } |
    ForEach-Object { $_.Name }

# --- Usage ---
if (-not $All -and (-not $Languages -or $Languages.Count -eq 0)) {
    Write-Host "Usage: .\install.ps1 <language> [<language> ...] [-All]"
    Write-Host ""
    Write-Host "Available languages:"
    foreach ($lang in $AvailableLanguages) {
        Write-Host "  - $lang"
    }
    exit 1
}

# Resolve --All to all available languages
if ($All) {
    $Languages = $AvailableLanguages
}

# Warn if destination already exists
if ((Test-Path $DestDir) -and (Get-ChildItem -Path $DestDir -ErrorAction SilentlyContinue)) {
    Write-Host "Note: $DestDir/ already exists. Existing files will be overwritten."
    Write-Host "      Back up any local customizations before proceeding."
}

# --- Install common rules ---
$CommonDest = Join-Path $DestDir 'common'
Write-Host "Installing common rules -> $CommonDest/"
New-Item -ItemType Directory -Path $CommonDest -Force | Out-Null
Copy-Item -Path (Join-Path $RulesDir 'common' '*') -Destination $CommonDest -Recurse -Force

# --- Install each requested language ---
foreach ($lang in $Languages) {
    # Validate language name to prevent path traversal
    if ($lang -notmatch '^[a-zA-Z0-9_-]+$') {
        Write-Warning "Invalid language name '$lang'. Only alphanumeric, dash, and underscore allowed."
        continue
    }
    $LangDir = Join-Path $RulesDir $lang
    if (-not (Test-Path $LangDir)) {
        Write-Warning "rules/$lang/ does not exist, skipping."
        continue
    }
    $LangDest = Join-Path $DestDir $lang
    Write-Host "Installing $lang rules -> $LangDest/"
    New-Item -ItemType Directory -Path $LangDest -Force | Out-Null
    Copy-Item -Path (Join-Path $LangDir '*') -Destination $LangDest -Recurse -Force
}

# --- Install agents ---
$AgentsDest = Join-Path $HOME '.claude' 'agents'
Write-Host "Installing agents -> $AgentsDest/"
New-Item -ItemType Directory -Path $AgentsDest -Force | Out-Null
Copy-Item -Path (Join-Path $AgentsDir '*.md') -Destination $AgentsDest -Force

# --- Install skills (preserve subdirectory structure) ---
$SkillsDest = Join-Path $HOME '.claude' 'skills'
Write-Host "Installing skills -> $SkillsDest/"
foreach ($skillDir in (Get-ChildItem -Path $SkillsDir -Directory)) {
    $SkillDestDir = Join-Path $SkillsDest $skillDir.Name
    New-Item -ItemType Directory -Path $SkillDestDir -Force | Out-Null
    Copy-Item -Path (Join-Path $skillDir.FullName 'SKILL.md') -Destination $SkillDestDir -Force
}

Write-Host "Done. Installed to ~/.claude/ (rules, agents, skills)."