#!/bin/sh
# roster:hitl-banner:v3 — SessionStart hook for Claude Code and Codex CLI.
#
# 1. (ROS-42) If `roster` is on PATH, run `roster pending sync --silent` with
#    a 5s timeout to synthesize HITL items from any failed-fire signals
#    (.exit non-zero + STALE detections). Silent on success, silent on
#    skip-because-no-roster, silent on timeout.
# 2. Count unread decisions in $PWD/roster/<function>/pending/*.md and print
#    one banner line if count > 0. Silent when count is 0. ("Unread" == still
#    in the queue; there is no read/seen state — count logic unchanged from v2.)
#
# Self-contained POSIX shell — Step 1 is best-effort opt-in, never blocks
# the session. Step 2 stays under the <200ms latency budget (p50 ~25ms).
#
# Installed by `roster hooks install` to:
#   ~/.claude/hooks/roster-banner.sh
#   ~/.codex/hooks/roster-banner.sh

set -u

# Run only inside roster workspaces. Quiet exit otherwise so non-roster
# sessions get zero overhead beyond shell startup.
[ -d "$PWD/roster" ] || exit 0

# Step 1: failed-fire synthesis (best-effort).
# Requires both `roster` on PATH AND a `timeout` binary. Skip silently
# otherwise — better to miss a sync than to block SessionStart on a slow
# workspace (codex review impl-pass: an unbounded fallback ran `roster
# pending sync` with no time cap; if disk was slow the user's first Claude
# Code message could be delayed seconds). Doctor remains the deterministic
# way to surface failed fires for users without a timeout binary.
if command -v roster >/dev/null 2>&1; then
  if command -v timeout >/dev/null 2>&1; then
    timeout 5 roster pending sync --silent --cwd "$PWD" >/dev/null 2>&1 || true
  elif command -v gtimeout >/dev/null 2>&1; then
    gtimeout 5 roster pending sync --silent --cwd "$PWD" >/dev/null 2>&1 || true
  fi
fi

# Step 2: banner. `find … | wc -l` returns 0 on empty, never errors on
# absent subdirs thanks to `-path` matching against a non-existent prefix
# being a no-op (the explicit `2>/dev/null` covers any read-permission
# edge case).
count=$(find "$PWD/roster" -mindepth 3 -maxdepth 3 -type f -name '*.md' -path '*/pending/*.md' 2>/dev/null | wc -l | tr -d ' ')

if [ "${count:-0}" -gt 0 ]; then
  if [ "$count" -eq 1 ]; then word=decision; else word=decisions; fi
  printf '⚠ You have %s unread %s awaiting — run /inbox\n' "$count" "$word"
fi