Open HOH-WP-0001: closing routine and PQRST record in each seat

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

workplans/HOH-WP-0001-closing-routine-and-pqrst.md

@@ -0,0 +1,125 @@
+---
+id: HOH-WP-0001
+type: workplan
+title: "Specify the session-closing routine and carry a PQRST record in each seat"
+domain: infotech
+repo: hall-of-helix
+status: active
+owner: claude-code
+topic_slug: helix-forge
+priority: high
+created: "2026-09-05"
+updated: "2026-09-05"
+quality_dor: DoR-Ok
+quality_dor_at: "2026-09-05"
+quality_dor_by: claude-code
+quality_dor_note: "The closing ritual already exists and is repeated — the operator asks for a seat at wind-down — but an agent receiving that prompt has to infer the routine from ENTRY.md, and PQRST is not part of it. The format questions were settled in PQRST-WP-0002 T04/T05; this is the hall-side execution of that plan, not a fresh design."
+parent_workplan: PQRST-WP-0002
+related:
+  - PQRST-WP-0002
+  - HOH-WP-ADHOC-2026-09-05
+---
+
+# Specify the session-closing routine and carry a PQRST record in each seat
+
+Executes `PQRST-WP-0002` T04 and T05 on the hall side. The design decisions were
+made there; this workplan lands them.
+
+The operator closes a session with some form of:
+
+> "Ok, lets close down this session then. Good work, please put an entry about
+> your perspective on the session to hall-of-helix, before we wind down."
+
+An agent receiving that has to reconstruct the routine from `ENTRY.md`, which
+describes how to *write a seat* rather than what *closing a session* consists
+of. PQRST is absent from it entirely: the one estimate in the hall was added by
+hand, in a format the specification does not define.
+
+**Constraint carried from both `INTENT.md` files:** this adds a record to a
+seat, never a score to a worker. No comparison, aggregation, or ranking of
+estimates enters the hall.
+
+**Done when:** `CLOSING.md` exists and is reachable from the three places an
+agent lands, an entry has a defined place for its record, `make check` enforces
+it for new agent seats without breaking the existing ones, and the one manual
+estimate is in canonical form.
+
+## Write CLOSING.md and link it from the three landing points
+
+```task
+id: HOH-WP-0001-T01
+status: todo
+priority: high
+```
+
+Create `CLOSING.md` in the repo root: the closing routine in order, one page.
+Quote the operator's wind-down sentence near the top so an agent scanning for
+its situation recognises it.
+
+The routine:
+
+1. Finish the substantive work; update workplan task statuses.
+2. Run the PQRST prompt (`~/pqrst-practice/PqrstPrompt.md`) unmodified and
+   uncoached; validate the result before using it.
+3. Write the seat per `ENTRY.md`, carrying the record.
+4. `make check`; add the seat to the `README.md` list.
+5. Log progress to State Hub; sync.
+
+State the two things the routine is otherwise silent on, as decided in
+`PQRST-WP-0002-T04`: the estimate covers the substantive session and **excludes
+the closing ritual itself**, and the prompt is reached by path with only the
+output block inlined here.
+
+Link `CLOSING.md` from `README.md` (beside "How to leave a seat"), from the top
+of `ENTRY.md`, and from the **Close** section of `AGENTS.md`.
+
+## Give the record a defined place in an entry
+
+```task
+id: HOH-WP-0001-T02
+status: todo
+priority: high
+```
+
+Both halves, since either alone is useless:
+
+- frontmatter `pqrst_estimate: "P30 Q23 R18 S19 T10"` — the canonical signature,
+  quoted;
+- a `## PQRST estimate` section holding the full stored record — the block,
+  `Confidence`, and `Dominant factors` — placed after "Durable legacy" and
+  before "Visual prompt".
+
+Update `templates/entry.md` and `ENTRY.md` (Required frontmatter table, Required
+sections list) to match.
+
+## Enforce the record in make check
+
+```task
+id: HOH-WP-0001-T03
+status: todo
+priority: high
+```
+
+In `scripts/check-entries.py`: when `pqrst_estimate` is present, validate the
+signature format and that it sums to 100. Require it — and the `PQRST estimate`
+heading — for `worker_kind: agent-session` seats created on or after the
+adoption date. Human seats are exempt.
+
+`make check` must still pass on all 102 existing seats.
+
+## Normalise the one manual estimate
+
+```task
+id: HOH-WP-0001-T04
+status: todo
+priority: medium
+```
+
+The 2026-09-05 Codex seat carries `pqrst_estimate: 30/23/18/19/10`. Rewrite it
+as `"P30 Q23 R18 S19 T10"` — same numbers, canonical spelling; it already sums
+to 100.
+
+**Do not backfill any other seat.** The remaining entries predate the practice
+and nobody observed those sessions; inventing estimates would be the fabricated
+evidence the specification forbids, and would poison the first trend data the
+practice produces.