git-worktree-runner: Instructions file for GitHub Copilot

AI Adapter Instructions

When to Use a File vs Registry

Most AI tools are defined as registry entries in lib/adapters.sh — no adapter file needed. Only create an adapter file in adapters/ai/ for tools that need custom behavior beyond the standard builder (see claude.sh or cursor.sh for examples).

Adding a Standard AI Tool (Registry)

Add a line to _AI_REGISTRY in lib/adapters.sh:

yourname|yourcmd|ToolName not found. Install with: ...|Extra info;More info

Format: name|cmd|err_msg|info_lines (info lines are semicolon-separated)

Adding a Custom AI Tool (File Override)

Create adapters/ai/<name>.sh implementing:

#!/usr/bin/env bash
# ToolName adapter

ai_can_start() {
  command -v tool-cli >/dev/null 2>&1
}

ai_start() {
  local path="$1"
  shift
  if ! ai_can_start; then
    log_error "ToolName not found. Install with: ..."
    return 1
  fi
  (cd "$path" && tool-cli "$@")  # Note: subshell for directory change
}

File-based adapters take precedence over registry entries of the same name.

Also update: the README tool list and the docs/configuration.md AI tool table, help text in lib/commands/help.sh (_help_ai); then run ./scripts/generate-completions.sh (completions are generated and checked in CI)

Contract & Guidelines

• Must define: ai_can_start (0 = available), ai_start <path> [args...] (runs in subshell (cd ...)).
• Always quote: "$path" and arguments; never assume current working directory.
• Use log_error + helpful install hint; never silent fail.
• Keep side effects confined to worktree directory; do not modify repo root unintentionally.
• Accept extra args after --: preserve ordering (ai_start receives already-shifted args).
• Prefer fast startup; heavy initialization belongs in hooks (postCreate), not adapters.
• When adding adapter: update help text, README and docs/configuration.md tool lists, then regenerate completions.
• Inspect function definition if needed: declare -f ai_start.