#!/usr/bin/env bash
# Pull only the designated shared vault; never block a new agent session.
set -u

vault_dir="${SHARED_VAULT_DIR:-${PWD:-}}"

emit() {
  printf '{"continue":true,"suppressOutput":true,"hookSpecificOutput":{"additionalContext":"%s"}}\n' "$1"
}

if [ ! -f "$vault_dir/AGENTS.md" ] || ! grep -Fq 'This is the shared persistent vault' "$vault_dir/AGENTS.md" || ! git -C "$vault_dir" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  emit 'Shared vault sync skipped: set SHARED_VAULT_DIR or start the session from the shared vault.'
  exit 0
fi

if [ -n "$(git -C "$vault_dir" status --porcelain)" ]; then
  emit 'Shared vault sync skipped: the worktree has local changes.'
  exit 0
fi

if GIT_TERMINAL_PROMPT=0 git -C "$vault_dir" pull --ff-only --quiet; then
  emit 'Shared vault sync completed.'
else
  emit 'Shared vault sync failed; run git pull --ff-only from the vault when it is safe to do so.'
fi