host: doc — blog SPA complete + live on the WASM OCaml kernel

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

plans/host-spa.md

@@ -1,5 +1,24 @@
 # Host blog → SPA via the SX-htmx engine (WASM OCaml kernel)
 
+## ✅ COMPLETE 2026-06-29 — live SPA on the WASM OCaml kernel
+
+blog.rose-ash.com is now a single-page app: the browser boots the SAME OCaml
+kernel the server runs (compiled to WASM), `sx-boost` fragment-swaps every link
+into #content with URL push + working back button, no full reload. Verified:
+native host conformance 271/271; `lib/host/playwright/spa-check` 4/4 in chromium;
+LIVE blog.rose-ash.com boost 19/19 + click nav + zero errors.
+
+The boot crash was the crypto stack assuming 63-bit int (fixed in `fce9e0c6`).
+The boost then needed six more source-load/boost-path fixes (commit `689dae7d`):
+import double-apply (library_loaded_p got a key not a spec), unloaded-import
+crash (library_exports nil -> empty dict), value_to_js missing Integer (broke
+dom-query-all -> only 1 link boosted), browser-same-origin? rejecting relative
+URLs, dom-query-in undefined (= dom-query), and lazy-deps never preloaded under
+source fallback (CEK can't lazy-resolve). Everything below is the history.
+
+---
+
+
 Turn the blog (lib/host/blog.sx) into a single-page app using the in-repo SX
 hypermedia engine (web/engine.sx — "our htmx"): boot the **WASM OCaml kernel**
 (the same evaluator the server runs) in the browser, and `sx-boost` every