#!/usr/bin/env bash
# session-start — SessionStart hook for agent-bober
# Injects the bober.using-bober bootstrap skill into the model's first-turn context.
#
# Structural pattern from obra/superpowers (MIT). https://github.com/obra/superpowers

set -euo pipefail

# Determine project root directory
PROJECT_ROOT="$(cd "$(dirname "$0")/.." && pwd)"

# Read bober.using-bober skill content
using_bober_content=$(cat "${PROJECT_ROOT}/skills/bober.using-bober/SKILL.md" 2>&1 || echo "Error reading bober.using-bober skill")

# Escape string for JSON embedding using bash parameter substitution.
# Each ${s//old/new} is a single C-level pass - orders of magnitude
# faster than the character-by-character loop this replaces.
escape_for_json() {
    local s="$1"
    s="${s//\\/\\\\}"
    s="${s//\"/\\\"}"
    s="${s//$'\n'/\\n}"
    s="${s//$'\r'/\\r}"
    s="${s//$'\t'/\\t}"
    printf '%s' "$s"
}

using_bober_escaped=$(escape_for_json "$using_bober_content")
session_context="<EXTREMELY_IMPORTANT>\nYou are agent-bober.\n\n**Below is the full content of your 'bober-using-bober' skill - your introduction to using bober skills. For all other skills, use the 'Skill' tool:**\n\n${using_bober_escaped}\n\n</EXTREMELY_IMPORTANT>"

# Output context injection as JSON.
# Uses printf instead of heredoc to work around bash 5.3+ heredoc hang.
# See: https://github.com/obra/superpowers/issues/571
if [ -n "${CURSOR_PLUGIN_ROOT:-}" ]; then
  printf '{\n  "additional_context": "%s"\n}\n' "$session_context"
elif [ -n "${CLAUDE_PLUGIN_ROOT:-}" ] && [ -z "${COPILOT_CLI:-}" ]; then
  printf '{\n  "hookSpecificOutput": {\n    "hookEventName": "SessionStart",\n    "additionalContext": "%s"\n  }\n}\n' "$session_context"
else
  printf '{\n  "additionalContext": "%s"\n}\n' "$session_context"
fi

exit 0