Companion to PQRST-WP-0002 (T04/T05), which settled the design. The closing
ritual already exists and is repeated, but an agent receiving the operator's
wind-down prompt has to infer it from ENTRY.md, and PQRST is absent from it.
Four tasks: write CLOSING.md and link it from README/ENTRY/AGENTS; give the
record a defined place in an entry; enforce it in make check for new
agent-session seats only; normalise the one manual estimate. No backfill of
seats for sessions nobody observed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SQ6oF1DtVDKcD1FCpvRVLx
Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 272883@bnt-lap001
Assistant-Session: f40c8f53-fb65-4980-9d29-bcdb3dd946f7
