All 13 tasks complete (implementation shipped in #570–573; staging
verification in #574). Archive via `openspec archive` (CLI 1.6.0):
- Creates openspec/specs/federation-operations/spec.md — the new
capability: durable federation queue, inbound replay defense, instance
blocklist, published protocol doc, delivery observability (Purpose
filled in; CLI leaves a TBD placeholder).
- Applies the MODIFIED requirement to openspec/specs/social-federation:
"Push delivery on local activity create" now guarantees persistent
queueing + a "Fan-out survives a deploy" scenario.
- Moves the change to openspec/changes/archive/2026-07-13-federation-hardening/.
Both specs pass `openspec validate --strict`.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
