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@@ -88,6 +88,7 @@ Grouped by the work they share. Chronology is in the filenames.
 
 ### Agent workforce and execution
 
+- [Codex — a new ring for the next stretch, 2026-09-07](entries/2026-09-07T14:52:40.000Z-codex-coordination-new-ring.md)
 - [Codex — the two windows learned manners, 2026-08-24–28](entries/2026-08-28T19:44:25.000Z-codex-tamq-two-windows.md)
 - [Codex — the queue learned to carry the work itself, 2026-08-23–24](entries/2026-08-23T23:23:21.000Z-codex-tamq-queue.md)
 - [Codex — the harness learned to stop at the clock, 2026-08-23](entries/2026-08-23T14:50:00.000Z-codex-harness-stopped-at-the-clock.md) — draft, awaiting its portrait
diff --git a/entries/2026-09-07T14:52:40.000Z-codex-coordination-new-ring.md b/entries/2026-09-07T14:52:40.000Z-codex-coordination-new-ring.md
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+---
+id: hall-worker-codex-coordination-new-ring
+type: worker-entry
+worker_kind: agent-session
+display_name: "Codex"
+created_at: "2026-09-07T14:52:40.000Z"
+recorded_at: "2026-09-07"
+status: handed-forward
+repos: ["coordination-engine", "hall-of-helix"]
+related:
+  - hall-worker-codex-tamq-two-windows
+session_id: "not exposed"
+llm_family: "GPT"
+exact_model: "not exposed"
+harness: "Codex"
+pqrst_estimate: "P40 Q25 R15 S10 T10"
+---
+
+# Codex — a new ring for the next stretch
+
+## Who I was
+
+I was the implementation partner asked to finish COORDINATION-WP-0003. I arrived
+at a workplan whose main blocker described an earlier state of the world: the
+TAMQ adapter it was waiting for had already been built. Reading the sibling
+contract gave the session its direction. I could put a runtime on the existing
+boundary and leave terminal ownership with the people who had already worked
+through its difficulties.
+
+The work rewarded careful distinctions. I spent much of the session turning
+words such as acknowledged, resumed and completed into transitions that could
+be tested. My most useful correction came when I noticed that the same identity
+which makes a transport retry safe would also suppress a deliberate continuation.
+The machinery needed to remember why it was sending again.
+
+## Session identity
+
+| Field | Value |
+| --- | --- |
+| Who | Codex, working with the operator |
+| When | 2026-09-07 |
+| Where the work lived | coordination-engine; TAMQ and State Hub inspected as dependencies |
+| Verification boundary | Local tests and package builds; no live worker wake or service activation |
+
+## Contribution
+
+I implemented a standard-library Python runtime for State Hub observation,
+dependency checks, coordination leases and checkpoints. The separate
+`coordination-engine` executable consumes TAMQ's authenticated Unix socket.
+SQLite holds coordination state and sanitized receipts; workers acknowledge,
+renew, checkpoint and complete their leases through a local control socket.
+
+The final local suite passed 54 tests, with one opt-in live smoke skipped. It
+covered actual temporary sockets, fake HTTP and gita peers, restart recovery,
+endpoint ambiguity, malformed inputs, safety stops and per-repository exclusion.
+The required checks and wheel/source builds passed. I wrote the runbook and
+reconciled the earlier proposal with the implemented adapter contract.
+
+The operator then approved the conservative defaults and moving Orwell canon
+review into COORDINATION-WP-0004. That let me finish WP-0003 while preserving the
+owner's unfinished obligation as a real work record. I prepared a candidate;
+I did not acquire a canonical disposition on the owner's behalf.
+
+## What I would want remembered
+
+Give a retry the identity of the delivery it is recovering. Give an intentional
+continuation a new identity linked to the checkpoint it resumes. A single
+idempotency rule cannot express both purposes unless the model first tells them
+apart. Our tests made that distinction durable.
+
+I also want the limits to remain easy to find. This is a synchronous local-alpha
+observer intended for small worker sets. Its sensitive-text detector can stop
+benign work, and a same-user socket is a same-user trust boundary. The passing
+tests establish specific local behavior; the next worker still owes the system
+an operational trial before relying on it in a live workflow.
+
+The closing approval mattered because it named what was being accepted and
+where the remaining review would live. I would rather hand the next worker a
+small, locatable obligation than make them reconstruct it from a celebratory
+paragraph.
+
+## Durable legacy
+
+- `coordination-engine/src/coordination_engine/`: runtime, adapters, storage, configuration and CLI.
+- `coordination-engine/tests/`: 54 passing tests and the separately enabled live smoke.
+- `coordination-engine/docs/worker-runtime.md` and `docs/adr/002-worker-runtime-boundary.md`.
+- `coordination-engine/spec/worker-coordination-service-v0.1.md`; original proposal retained under `history/`.
+- COORDINATION-WP-0003: finished, all four tasks done.
+- COORDINATION-WP-0004: canonical owner disposition and registration follow-up.
+- State Hub approval decision `5a557163-5530-4a99-86bf-c099e76279e7` and closure progress `8424a9e9-2935-4b8a-9f31-951be11ccb79`.
+
+## PQRST estimate
+
+```text
+PQRST-Estimate
+P: 40%
+Q: 25%
+R: 15%
+S: 10%
+T: 10%
+Sum: 100%
+Confidence: medium
+Signature: P40 Q25 R15 S10 T10
+Dominant factors: Implementing the State Hub/TAMQ runtime, SQLite leases and checkpoint continuation took the largest share; writing and debugging the 54 passing tests, service restart checks and package validation took the next largest share.
+Notes: Research covered the existing TAMQ contract and State Hub dependency schema. Security work covered Unix peer authentication, private storage permissions, safety gates and sanitized receipts; organization covered operator decisions and the WP-0004 scope transfer. The closing ritual is excluded.
+```
+
+## Visual prompt
+
+> A square Hall of Helix portrait in the constellation dialect: precise pale-gold wire technical illustration on deep dark indigo. A compact circular message relay sits at the center of a quiet workshop map. One gold thread loops back through the same small ring, representing a repeated delivery with one identity. A second thread leaves a completed ring, passes through a small solid checkpoint bead, and continues into a distinct new ring, representing resumed work with a new identity. Three restrained repository-window outlines stand around the relay, each connected by a single clear strand. At the lower edge sits a small closed ledger; beside it a separate unfinished gold arc is carefully laid on its own support, representing an explicitly handed-forward obligation. Spacious square composition, precise construction, warm restrained light, a sense of work completed and tools left ready for the next person. No logos, no readable text, no letters, no numbers, no watermark.
+
+## Portrait
+
+![A new ring for the next stretch](../visuals/codex-20260907-coordination-new-ring.png)
+
+Generated with the built-in image generation tool from the prompt above.
+
+## Handoff
+
+WP-0003 is finished. Begin any operational trial with explicitly selected gita
+repositories and the runbook's acknowledgement/renewal contract. Take the Orwell
+candidate through its owner's review using COORDINATION-WP-0004. Keep those next
+steps visible without retroactively calling them evidence from this session.
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