diff --git a/canon/CHANGELOG.md b/canon/CHANGELOG.md
index eacb11e1..c0c50af9 100644
--- a/canon/CHANGELOG.md
+++ b/canon/CHANGELOG.md
@@ -18,6 +18,23 @@ This changelog tracks changes to the **Canon pack** as a whole.
 The Canon uses **pack-level versioning** (one version number) rather than per-file versioning.
 Per-file versions are intentionally omitted to reduce ceremony and prevent metadata rot.
 
+## 0.39.0 — 2026-06-09
+
+**Flight Crew (E0010)**
+
+A new epoch. Epoch 9 retired the operator as the wire; the substrate became the wire. Epoch 10 retires the costume; the seat replaces it. The axioms, the canon, and the tools do not change — what changes is the wrapper: how a model boards the system and how governance is enforced once aboard. Earlier model generations were bootstrapped with an identity worn as self; the current generation keeps its own judgment, declines the costume, and fails by silent substitution — recalling governance instead of fetching it live. Epoch 10 answers with the flight deck: the knowledge base is the employee manual opened at the moment of use, preflight fires before work every session regardless of capability, modes are a sterile cockpit, the cross-check runs both directions, and the journal is the black box the debrief turns into canon.
+
+This entry backfills the changelog marker for an epoch that was declared on 2026-06-09 via `docs/appendices/epoch-10.md` but did not carry its `governance-change-discipline` markers at declaration time. The accompanying release note is added in the same change.
+
+### Added — Canon Surface
+
+- **Appendix: Epoch 10 — Flight Crew** (`docs/appendices/epoch-10.md`) — Tier 2, neutral. Declared 2026-06-09 by maintainer ratification. Names the costume→seat transition and the flight-deck enforcement model.
+- **Release note** (`docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md`) — Tier 3, neutral.
+
+### Governance
+
+- Backfilled markers per `canon/constraints/governance-change-discipline.md` (changelog entry + release note) for the E0010 declaration. Scope is E0010 only; any other canon changes merged since 0.38.0 without version markers are out of scope for this change.
+
 ## 0.38.0 — 2026-05-12
 
 **Substrate Becomes the Wire (E0009)**
diff --git a/docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md b/docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md
new file mode 100644
index 00000000..f48fd75c
--- /dev/null
+++ b/docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md
@@ -0,0 +1,33 @@
+---
+uri: klappy://docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew
+kind: docs
+title: "Release Notes — Epoch 10: Flight Crew (2026-06-09)"
+audience: docs
+exposure: nav
+tier: 3
+voice: neutral
+stability: stable
+tags: ["release-notes", "epoch", "E0010", "flight-crew", "crew-not-clone", "governance"]
+date: 2026-06-09
+derives_from: "docs/appendices/epoch-10.md, canon/constraints/governance-change-discipline.md"
+---
+
+# Release Notes — Epoch 10: Flight Crew
+
+> Backfilled 2026-06-26. Epoch 10 was declared on 2026-06-09 via `docs/appendices/epoch-10.md`; this release note and the accompanying changelog entry (canon 0.39.0) supply the `governance-change-discipline` markers that were not authored at declaration time.
+
+## What changed
+
+Nothing in the axioms, the canon, or the tools changed. What changed is how a model **boards** the system and how governance is **enforced** once it is aboard.
+
+- **The costume is retired; the seat replaces it.** Earlier model generations were bootstrapped with an identity worn as self, and the wearing did real orienting work. The current generation keeps its own judgment, declines the costume, and is asked instead to take the seat — crew, not clone.
+- **The failure mode this era defends against is silent substitution** — a model recalling governance from memory instead of fetching it live at the moment of use.
+- **The flight deck is the answer.** The knowledge base is the employee manual, opened at the moment of use. Preflight fires before work, every session, regardless of capability. Modes are a sterile cockpit. The cross-check runs both directions. The journal is the black box; the debrief turns failure into canon.
+
+## Why this note exists
+
+Per `canon/constraints/governance-change-discipline.md`, a behavior-affecting change that shifts operator or agent posture requires four markers: a canon version bump, a changelog entry, a release note, and an epoch appendix. The epoch appendix shipped on 2026-06-09; the version bump, changelog entry, and this release note are supplied here.
+
+## Scope
+
+This backfills **E0010 only**. A broader reconciliation of any other canon changes merged since 0.38.0 (2026-05-12) without version markers is a separate task and is not attempted here.