list-plans

Discovers valid migration plans in the workspace and returns the selected plan path. A valid plan is a subdirectory of .github/modernize/ that contains plan.md AND tasks.json (tasks.json may be in the plan folder or in a .metadata subfolder). Handles 0, 1, or multiple plans and prompts the user when a choice is needed. Triggers: "list plans", "find plans", "select plan", "list-and-select-plan", "discover plans".

List and Select Plan

Step 1 — Discover valid plans

You MUST run this in a terminal — do NOT use file tools (list_dir, file_search, grep_search) to discover plans.

Detect the OS and run the matching script in the terminal. Replace <workspace-root> with the absolute path to the workspace root before running.

Windows (PowerShell) — run in terminal:

Set-Location "<workspace-root>"
$modernizeDir = ".github/modernize"
$plans = @()

if (Test-Path $modernizeDir) {
    Get-ChildItem -Path $modernizeDir -Directory | ForEach-Object {
        $hasPlan  = Test-Path (Join-Path $_.FullName "plan.md")
        $hasTasks = (Test-Path (Join-Path $_.FullName "tasks.json")) -or (Test-Path (Join-Path $_.FullName ".metadata/tasks.json"))
        if ($hasPlan -and $hasTasks) {
            $plans += @{ folder = $_.Name; planPath = "$modernizeDir/$($_.Name)/plan.md" }
        }
    }
}

$plans | ConvertTo-Json -Depth 2

macOS / Linux (bash) — run in terminal:

cd "<workspace-root>"
modernize_dir=".github/modernize"
entries="[]"

if [ -d "$modernize_dir" ]; then
    for folder in "$modernize_dir"/*/; do
        [ -d "$folder" ] || continue
        name=$(basename "$folder")
        if [ -f "$folder/plan.md" ] && ([ -f "$folder/tasks.json" ] || [ -f "$folder/.metadata/tasks.json" ]); then
            entry="{\"folder\":\"$name\",\"planPath\":\"$modernize_dir/$name/plan.md\"}"
            if [ "$entries" = "[]" ]; then
                entries="[$entry]"
            else
                entries="${entries%]},$entry]"
            fi
        fi
    done
fi

echo "$entries"

Parse the JSON output from the terminal as the list of valid plans for the next step.

Step 2 — Route based on count

No plans found

Return no-plans-found to the caller. Do not prompt the user.

Exactly 1 plan found

Return its path immediately — no user prompt needed:

.github/modernize/<folder>/plan.md

Multiple plans found

For each plan, read .github/modernize/<folder>/plan.md, extract the first heading, strip the leading # and any prefix of the form <Word> Plan: (e.g. Modernization Plan: , Migration Plan: ), and use the remainder as the title.
Print: Searched for plan.md and tasks.json files... There are multiple plans in this repository.
Ask the user to select a plan:
- header: plan-selection
- question: Which plan would you like to execute?
- allowFreeformInput: false
- options: one entry per plan — label = folder name, description = plan title from step 1

Step 3 — Return

Return the selected plan path to the caller:

.github/modernize/<selected-folder>/plan.md