canon(E0010): backfill Flight Crew governance markers (changelog 0.39.0 + release note)

[git-repo-auth]

What

Backfills the governance-change-discipline markers for Epoch 10 — Flight Crew, which was declared on 2026-06-09 via docs/appendices/epoch-10.md but never received its changelog entry or release note.

Changes

• canon/CHANGELOG.md — new entry 0.39.0 — 2026-06-09 (Flight Crew, E0010), transcribed from the already-declared epoch-10.md. Inserted above 0.38.0 (E0009) in chronological order.
• docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md — new release note, dated to the declaration event per convention.

Not in scope

• The epoch appendix already exists and is unchanged — this PR does not redeclare the epoch.
• A broader changelog reconciliation for any other canon merged since 0.38.0 without markers is a separate task, flagged for the captain.

Provenance

Framing is transcribed from docs/appendices/epoch-10.md (your declared text), not authored fresh. Version 0.39.0 and the chronological placement are my call — overturn in review. Merge is yours.

---

Note

Low Risk
Documentation-only governance metadata; no runtime, auth, or canon substance changes beyond version/changelog/release-note markers.

Overview
Backfills missing governance-change-discipline markers for Epoch 10 (Flight Crew, E0010), which was already declared in docs/appendices/epoch-10.md on 2026-06-09 without a pack version bump, changelog entry, or release note.

Adds canon/CHANGELOG.md entry 0.39.0 — 2026-06-09, summarizing the epoch’s posture shift (costume→seat, live governance fetch vs silent substitution, flight-deck enforcement) and noting the backfill is E0010-only. Adds docs/oddkit/release-notes/2026-06-09-epoch-10-flight-crew.md, impact-framed release notes tied to the same declaration date. No change to the epoch appendix or substantive canon/tool behavior.

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[github-actions]

Canon Quality — Homepage Surfacing ✅

49 essay(s) scanned. Soft report — never blocks; the hard field gate is the Frontmatter Schema job.

All published essays resolve to the homepage feed.

_{Report: scripts/surfacing-report.py · Canon: klappy://canon/constraints/frontmatter-validation-before-merge}

[github-actions]

Canon Quality — Frontmatter Schema ✅

All 49 file(s) in writings/ conform to klappy://canon/meta/frontmatter-schema.

_{Validator: scripts/validate-frontmatter.py · Canon: klappy://canon/constraints/frontmatter-validation-before-merge · Run: #305}

[github-actions]

Canon Quality — oddkit_audit ✅

No dead klappy:// references or legacy link patterns found in writings/. 51 files scanned.

_{Spec: klappy://docs/oddkit/specs/oddkit-audit · Workflow: .github/workflows/canon-quality.yml · Run: #305}

[github-actions]

Canon Quality — P0010 Retrieval-Readiness ⚠️

Soft report for klappy://canon/constraints/retrieval-disclosure-contract. 681 files scanned. Never blocks — informational until the corpus is ready to enforce.

• Blocking-class findings: 15 (structural fields the contract would filter on)
• Warnings: 0 (kind resolves to unknown)
• Informational: 13 (exempt templates/archive/drafts)

Kind distribution: {'essays': 51, 'canon': 229, 'apocrypha': 38, 'docs': 298, 'journals': 59, 'unknown': 6}
Kind source: {'path': 549, 'frontmatter': 126, 'none': 6} (frontmatter-primary, path-secondary)
Default-include visibility: 578 visible, 103 hidden (journals/apocrypha/unknown)

By rule: {'audience-invalid': 2, 'exposure-missing': 5, 'tier-missing': 5, 'tier-invalid': 7, 'fm-missing': 3, 'kind-unresolvable': 6}

These are not schema violations (see the Frontmatter Schema job for those on writings/). They are corpus-readiness signals for the retrieval contract: invalid/missing audience, exposure, tier, and docs whose kind cannot be resolved. Fix in a corpus-cleanup PR before the contract flips to enforcing. See the retrieval-readiness-findings artifact for the full list.

_{Validator: scripts/audit-retrieval-readiness.py · Constraint: klappy://canon/constraints/retrieval-disclosure-contract · Run: #305}