runner

#!/usr/bin/env bash
# Guardrail shim that wraps every command with the Bun runner; when behavior changes, record the note via ./scripts/committer \"docs: update AGENTS for runner\" \"AGENTS.md\" so fellow agents keep pace.
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

is_env_assignment() {
  [[ "$1" =~ ^[A-Za-z_][A-Za-z0-9_]*=.+ ]]
}

is_wrapper_command() {
  case "$1" in
    sudo|/usr/bin/sudo|env|/usr/bin/env|command|/bin/command|nohup|/usr/bin/nohup)
      return 0
      ;;
    *)
      return 1
      ;;
  esac
}

resolve_primary_command() {
  local tokens=("$@")
  local index=0
  local total=${#tokens[@]}

  while (( index < total )); do
    local candidate=${tokens[$index]}
    [[ -z "$candidate" ]] && ((index++)) && continue
    if is_env_assignment "$candidate"; then
      ((index++))
      continue
    fi
    break
  done

  while (( index < total )); do
    local wrapper=${tokens[$index]}
    if ! is_wrapper_command "$wrapper"; then
      break
    fi
    ((index++))
    while (( index < total )); do
      local assignment=${tokens[$index]}
      if is_env_assignment "$assignment"; then
        ((index++))
        continue
      fi
      break
    done
  done

  if (( index < total )); then
    printf '%s' "${tokens[$index]}"
  fi
}

PRIMARY_COMMAND=$(resolve_primary_command "$@")
if [[ -n "$PRIMARY_COMMAND" ]]; then
  case "${PRIMARY_COMMAND##*/}" in
    tmux)
      exec "$@"
      ;;
  esac
fi

if ! command -v bun >/dev/null 2>&1; then
  echo "[runner] bun is required but was not found on PATH." >&2
  echo "[runner] Install Bun from https://bun.sh and retry." >&2
  exit 1
fi

exec bun "$ROOT_DIR/scripts/runner.ts" "$@"