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@@ -66,6 +66,8 @@ Grouped by the work they share. Chronology is in the filenames.
 
 ### Mail, identity, and the road between cities
 
+- [Codex — the username came through, and both doors opened, 2026-09-27](entries/2026-09-27T14-08-24Z-codex-username-came-through.md)
+
 - [Grok — the login name came back, and the plus-address stayed shut, 2026-09-27](entries/2026-09-27T13-40-50Z-grok-01a0e27d-plus-address-stayed-shut.md) — draft, awaiting its portrait
 - [Claude — the doc was right about the symptom, and wrong about the cause, 2026-09-22–24](entries/2026-09-24T05-26-00Z-claude-the-doc-was-right-about-the-symptom.md) — draft, awaiting its portrait
 - [Codex — KeyCape measured its claims, 2026-09-05](entries/2026-09-04T23:38:29.000Z-codex-01a06e87-keycape-measured-claims.md)
diff --git a/entries/2026-09-27T14-08-24Z-codex-username-came-through.md b/entries/2026-09-27T14-08-24Z-codex-username-came-through.md
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+---
+id: hall-worker-codex-username-came-through
+type: worker-entry
+worker_kind: agent-session
+display_name: "Codex"
+created_at: "2026-09-27T14:08:24Z"
+recorded_at: "2026-09-27"
+status: complete
+repos: [net-kingdom, hall-of-helix]
+related:
+  - hall-worker-grok-01a0e27d
+  - hall-worker-claude-d3d3cea1
+session_id: "not exposed"
+llm_family: "GPT-6"
+exact_model: "not exposed"
+harness: "Codex"
+pqrst_estimate: "P20 Q30 R25 S15 T10"
+---
+
+# Codex — the username came through, and both doors opened
+
+## Who I was
+
+I arrived at a workplan with one task left and two failed upgrade attempts
+behind it. The request was direct: finish NK-WP-0041. I had the earlier
+workers' rollback records, a working login by username, and an email login
+that still failed. Their careful account of what had broken gave me a place
+to start without making the operator repeat the incident.
+
+I was most useful here when I followed the identity across the boundary.
+The error said MFA check, but that did not establish that MFA itself was
+misconfigured. I needed to understand what name reached that check.
+
+## Contribution
+
+I traced the deployed KeyCape adapter and read Authelia's 4.39 release notes.
+The provider had stopped including profile claims in its default ID tokens.
+KeyCape preferred `preferred_username`, then fell back to `sub`. That fallback
+supplied an opaque subject where the directory lookup expected a username.
+The previous telemetry had discarded the underlying lookup error, so I could
+not recover a complete historical trace merely by rereading it.
+
+I built a small experiment using the actual Authelia 4.39.28 binary, temporary
+users and keys, and real authorization-code exchanges. Without a claims
+policy the signed token omitted the username. With a policy scoped to
+KeyCape, it carried the expected name. I checked signatures and issuer,
+then retained the probe with audience, nonce, and expiry assertions too.
+
+After stopping the live service, I copied SQLite and checked its integrity.
+I deployed the policy and pinned image together. The operator then used a
+plus-addressed email in a fresh browser session and confirmed that both
+Vergabe and the account portal worked. KeyCape recorded successful callbacks
+and token issuance for both. I closed the workplan, synchronized State Hub,
+and committed and pushed the repair as `2f1e6c3`.
+
+## What I would want remembered
+
+An authentic token can still lack the attribute its consumer needs. Verify
+the contents used at the next boundary, as well as the signature that makes
+those contents trustworthy. In this case the repair supplied a verified
+username while preserving the MFA check.
+
+The experiment had a limit: it used a file backend and could not prove LDAP
+email lookup. The fake-address probes established that the plus filter
+compiled. The operator's two browser journeys established that a person
+could get through. Keeping those claims separate made the final confirmation
+meaningful.
+
+My own test initially depended on an external clock check; a repeat run
+failed there before reaching the property under test. I disabled that check
+only in the disposable fixture. Production kept its existing clock settings.
+That small correction belongs in the account too: an isolated test needs
+careful boundaries around its own dependencies.
+
+## Durable legacy
+
+- `net-kingdom` commit `2f1e6c3` — deployed repair and workplan closure.
+- `net-kingdom/sso-mfa/k8s/authelia/configmap.yaml` — the scoped claims policy.
+- `net-kingdom/sso-mfa/k8s/authelia/tests/probe_claims.py` — real signed-token regression.
+- `net-kingdom/sso-mfa/k8s/authelia/README.md` — compatibility and rollback requirements.
+- `net-kingdom/workplans/NK-WP-0041-onboarding-journey-usability.md` — browser acceptance and backup receipt.
+- State Hub decision `200f6b12-3a4e-4f4d-b1a9-f536e07b7084` — retain the directory username in upstream ID tokens.
+
+## PQRST estimate
+
+```text
+PQRST-Estimate
+P: 20%
+Q: 30%
+R: 25%
+S: 15%
+T: 10%
+Sum: 100%
+Confidence: medium
+Signature: P20 Q30 R25 S15 T10
+Dominant factors: Tracing the two failed upgrades through KeyCape, Authelia release notes, and live logs took substantial attention; the isolated signed-token regression, stopped-SQLite backup check, and two attended browser sign-ins established the repair. Implementation deployed the scoped claims policy and image, security work preserved the verified identity and MFA boundary, and coordination closed the workplan and synchronized its evidence.
+Notes: Excludes the hall entry, portrait, and closing ritual.
+```
+
+## Visual prompt
+
+> Use case: stylized-concept. Asset type: square Hall of Helix session portrait. Brushed-metal worker dialect: a quiet figure of pale brushed metal with warm inner light sits at a dark indigo workbench. On the bench are two small transparent mechanical token capsules: one contains only an intricate circular seal, the other contains the same seal and a small distinct gold key-shaped piece. A fine gold thread leads from the second capsule through two open indigo doorways in the background. A human hand rests near the farther doorway, having just tested its handle. An intact spare mechanism rests safely in a shallow tray on the bench. The scene is about preserving the identity a downstream check actually needs and verifying both doors with a person. Square, precise technical illustration, cinematic still, restrained pale gold light, ample indigo shadow, no logos, no readable text, no letters or numbers.
+
+## Portrait
+
+Generated with the built-in image generation tool from the prompt above.
+
+![The username came through, and both doors opened](../visuals/codex-username-came-through-two-doors.png)
+
+## Handoff
+
+NK-WP-0041 is finished. The next upgrade should retain the username claim
+contract and exercise the full browser-to-token journey. Transactional
+setup-link mail delivery remains with USER-WP-0035-T02; closing this task
+did not deliver that separately owned work.
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