gstack-codex-probe

#!/usr/bin/env bash
# gstack-codex-probe: shared helper for /codex and /autoplan skills.
# Sourced from template bash blocks; never execute directly.
#
# Functions (all prefixed with _gstack_codex_ for namespace hygiene):
#   _gstack_codex_auth_probe      — multi-signal auth check (env + file)
#   _gstack_codex_version_check   — warn on known-bad Codex CLI versions
#   _gstack_codex_timeout_wrapper — gtimeout -> timeout -> shell-watchdog fallback
#   _gstack_codex_log_event       — telemetry emission to ~/.gstack/analytics/
#
# Hygiene rules (enforced by test/codex-hardening.test.ts):
#   - Never set -e / set -u / trap / IFS= / PATH= in this file.
#   - All internal vars prefix with _GSTACK_CODEX_.
#   - All functions prefix with _gstack_codex_.
#   - No command execution at source time (only function defs).

# --- Auth probe -------------------------------------------------------------

_gstack_codex_auth_probe() {
  # Multi-signal: env vars OR auth file. Avoids false negatives for env-auth
  # users (CI, platform engineers) that a file-only check would reject.
  local _codex_home="${CODEX_HOME:-$HOME/.codex}"
  # Use `-n` which returns true only for non-empty non-whitespace. Bash's [ -n ]
  # alone allows whitespace; pair with a whitespace strip for robustness.
  local _k1 _k2
  _k1=$(printf '%s' "${CODEX_API_KEY:-}" | tr -d '[:space:]')
  _k2=$(printf '%s' "${OPENAI_API_KEY:-}" | tr -d '[:space:]')
  if [ -n "$_k1" ] || [ -n "$_k2" ] || [ -f "$_codex_home/auth.json" ]; then
    echo "AUTH_OK"
    return 0
  fi
  echo "AUTH_FAILED"
  return 1
}

# --- Version check ----------------------------------------------------------

_gstack_codex_version_check() {
  # Warn on known-bad Codex CLI versions. Anchored regex prevents false
  # positives like 0.120.10 or 0.120.20 from matching. 0.120.2-beta still
  # matches the bad release and gets warned (it IS buggy).
  # Update this list when a new Codex CLI version regresses.
  local _ver
  _ver=$(codex --version 2>/dev/null | head -1)
  [ -z "$_ver" ] && return 0
  if echo "$_ver" | grep -Eq '(^|[^0-9.])0\.120\.(0|1|2)([^0-9.]|$)'; then
    echo "WARN: Codex CLI $_ver has known stdin deadlock bugs. Run: npm install -g @openai/codex@latest"
    _gstack_codex_log_event "codex_version_warning"
  fi
}

# --- Timeout wrapper --------------------------------------------------------

_gstack_codex_timeout_wrapper() {
  # Resolve wrapper binary: prefer gtimeout (Homebrew coreutils on macOS),
  # fall back to timeout (Linux), else a pure-shell watchdog so hang
  # protection still works on machines with neither (e.g. bare macOS).
  # Arguments: $1 is the duration in seconds; rest is the command to run.
  local _duration="$1"
  shift
  local _to
  _to=$(command -v gtimeout 2>/dev/null || command -v timeout 2>/dev/null || echo "")
  if [ -n "$_to" ]; then
    "$_to" "$_duration" "$@"
    return $?
  fi
  # Shell watchdog: background the command, poll every 5s, TERM at the
  # deadline (KILL 10s later if TERM is ignored), and report exit 124 like
  # GNU timeout so callers' hang handling still fires. The brace group
  # routes the shell's own stderr to /dev/null so bash's "Terminated" job
  # notices never leak into skill output, while fd 3 carries the real
  # stderr through to the command (call-site 2> captures keep working).
  # Both jobs are reaped inside the silenced group so no notice surfaces
  # later and nothing outlives the call holding the caller's pipes open.
  local _cmd_pid _watchdog_pid
  local _rc=0
  {
    "$@" 2>&3 3>&- &
    _cmd_pid=$!
    (
      _waited=0
      while [ "$_waited" -lt "$_duration" ]; do
        sleep 5
        kill -0 "$_cmd_pid" 2>/dev/null || exit 0
        _waited=$((_waited + 5))
      done
      kill -TERM "$_cmd_pid" 2>/dev/null
      sleep 10
      kill -KILL "$_cmd_pid" 2>/dev/null
    ) >/dev/null 2>&1 3>&- &
    _watchdog_pid=$!
    wait "$_cmd_pid" || _rc=$?
    kill "$_watchdog_pid" 2>/dev/null
    wait "$_watchdog_pid" 2>/dev/null || :
  } 3>&2 2>/dev/null
  if [ "$_rc" -eq 143 ] || [ "$_rc" -eq 137 ]; then
    _rc=124
  fi
  return "$_rc"
}

# --- Telemetry event --------------------------------------------------------

_gstack_codex_log_event() {
  # Emit a telemetry event to ~/.gstack/analytics/skill-usage.jsonl.
  # Gated on $_TEL != "off" (caller sets this from gstack-config).
  # Event types: codex_timeout, codex_auth_failed, codex_cli_missing,
  #              codex_version_warning.
  # Payload schema: {skill, event, duration_s, ts}. NEVER includes prompt
  # content, env var values, or auth tokens.
  local _event="$1"
  local _duration="${2:-0}"
  [ "${_TEL:-off}" = "off" ] && return 0
  mkdir -p "$HOME/.gstack/analytics" 2>/dev/null || return 0
  local _ts
  _ts=$(date -u +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || echo unknown)
  printf '{"skill":"codex","event":"%s","duration_s":"%s","ts":"%s"}\n' \
    "$_event" "$_duration" "$_ts" \
    >> "$HOME/.gstack/analytics/skill-usage.jsonl" 2>/dev/null || true
}

# --- Learnings log on hang --------------------------------------------------

_gstack_codex_log_hang() {
  # Invoked when a codex invocation times out (exit 124). Records an
  # operational learning so future /investigate sessions surface the pattern.
  # Best-effort: errors swallowed.
  local _mode="${1:-unknown}"
  local _prompt_size="${2:-0}"
  local _log_bin="$HOME/.claude/skills/gstack/bin/gstack-learnings-log"
  [ -x "$_log_bin" ] || return 0
  local _key="codex-hang-$(date +%s 2>/dev/null || echo unknown)"
  "$_log_bin" "$(printf '{"skill":"codex","type":"operational","key":"%s","insight":"Codex timed out after 600s during [%s] invocation. Prompt size: %s. Consider splitting prompt or checking network.","confidence":8,"source":"observed","files":["codex/SKILL.md.tmpl","autoplan/SKILL.md.tmpl"]}' "$_key" "$_mode" "$_prompt_size")" \
    >/dev/null 2>&1 || true
}