research: Federated Wiki deep dive (journal/fork/neighborhood); UC-70-72

SHARD-WP-0003 T1. Federation model (not a shard candidate): per-page
append-only semantic-action journal with story as derived replay,
fork-with-site-provenance, neighborhood/roster discovery + chorus of forks.
Prior art for shard-wiki's own pillars: coordination journal (UC-71),
overlay-before-mutation (UC-26 fork), union-without-erasure (UC-72).
Attach as REST/file-store hybrid (page JSON + CORS, UC-70). Feeds
SHARD-WP-0002 T1-T5, T11, T13, T16.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/ralph-loop.local.md

@@ -0,0 +1,21 @@
+---
+active: true
+iteration: 1
+session_id: b24b53ca-a25b-4a18-8331-925c4100d39f
+max_iterations: 20
+completion_promise: "HEUREKA"
+workplan_id: SHARD-WP-0003
+workplan_file: workplans/SHARD-WP-0003-engine-dives-batch.md
+started_at: "2026-06-14T16:37:36Z"
+---
+
+Read the workplan at `workplans/SHARD-WP-0003-engine-dives-batch.md`.
+
+If every task has `status: done` AND frontmatter `status: done`:
+run `rm -f .claude/ralph-loop.local.md` first (deactivates the loop so the stop hook exits cleanly),
+then output <promise>HEUREKA</promise>.
+
+Otherwise implement the next `todo` task as described in the workplan.
+Set task `in_progress` when starting, `done` when complete.
+When all tasks are done set frontmatter `status: done`.
+