feed: feed/home capstone — fanout∘inbox∘dedupe∘ACL∘rank∘take as one line + 6 tests

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plans/feed-on-sx.md

@@ -14,7 +14,7 @@ APL, ACL visibility filtering via `lib/acl/`, federation via fed-sx.
 
 ## Status (rolling)
 
-`bash lib/feed/conformance.sh` → **128/128** (Phases 1–4 + TF-IDF + notifications)
+`bash lib/feed/conformance.sh` → **134/134** (Phases 1–4 + TF-IDF + notifications + home)
 
 ## Ground rules
 
@@ -144,6 +144,9 @@ are function parameters. Real acl-sx / fed-sx wire in at the call site unchanged
 - [x] Notification feed (verb-filtered, per-recipient) — `notify.sx`:
   `feed/notifications`, `feed/notify-verbs`, `feed/notify-digest` (collapses
   "X, Y liked Z" by (verb,object), sorted-deterministic); 8 tests. (128/128 total.)
+- [x] **Capstone** `feed/home` — the whole pipeline as one line: fanout ∘ inbox ∘
+  dedupe ∘ ACL ∘ rank ∘ take (`home.sx`); 6 tests incl. per-viewer ACL + cross-post
+  dedupe. (134/134 total.)
 
 (none)