dream: api.sx facade (make-app/serve) + README documenting public surface + 9 tests

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

plans/dream-on-sx.md

@@ -124,6 +124,12 @@ with extensions + hardening below.
   `dream-param-or` (defaults), `dream-has-query?` / `-header?` / `-param?`,
   `dream-content-type-of`, `dream-method-is?`, `dream-accepts?` / `dream-wants-json?`
   (Accept-header content negotiation).
+- **2026-06-07 — Ext: api.sx facade + README** (`lib/dream/api.sx`, 9 tests, 367 total).
+  `dream-version`, `dream-defaults` (pure stack: error-catch + content-type; logger is
+  opt-in since it performs IO), `dream-make-app routes`, `dream-make-app-with`,
+  `dream-serve`/`dream-serve-port`. `lib/dream/README.md` documents the full public
+  surface, quickstart, the dependency-injection testing story, and caveats. **All
+  planned extensions complete — 367/367 across 14 suites.**
 
 ## Extensions (post-roadmap)
 
@@ -137,7 +143,7 @@ The five-types core is complete; these harden it toward a production HTTP front
 - [x] **Signed session cookies** (`dream-sessions-signed` — tamper-evident sid).
 - [x] **JSON helpers** (encode + recursive-descent parse, pure SX).
 - [x] **Query/header convenience** (`dream-queries`, `*-or` defaults, `dream-accepts?`).
-- [ ] **`api.sx` facade + README** — single load point listing the public surface.
+- [x] **`api.sx` facade + README** — `dream-make-app` / `dream-serve` + `README.md`.
 
 ## Stdlib additions Dream will need