Merge branch 'worktree-endpoints' into macros

shared/sx/ref/boundary.sx

@@ -138,6 +138,57 @@
         "list" "dict" "sx-source"))
 
 
+;; --------------------------------------------------------------------------
+;; Web interop — reading non-SX request formats
+;;
+;; SX's native wire format is SX (text/sx). These primitives bridge to
+;; legacy web formats: HTML form encoding, JSON bodies, HTTP headers.
+;; They're useful for interop but not fundamental to SX-to-SX communication.
+;; --------------------------------------------------------------------------
+
+(define-io-primitive "now"
+  :params (&rest format)
+  :returns "string"
+  :async true
+  :doc "Current timestamp. Optional format string (strftime). Default ISO 8601."
+  :context :request)
+
+(define-io-primitive "sleep"
+  :params (ms)
+  :returns "nil"
+  :async true
+  :doc "Pause execution for ms milliseconds. For demos and testing."
+  :context :request)
+
+(define-io-primitive "request-form"
+  :params (name &rest default)
+  :returns "any"
+  :async true
+  :doc "Read a form field from a POST/PUT/PATCH request body."
+  :context :request)
+
+(define-io-primitive "request-json"
+  :params ()
+  :returns "dict?"
+  :async true
+  :doc "Read JSON body from the current request, or nil if not JSON."
+  :context :request)
+
+(define-io-primitive "request-header"
+  :params (name &rest default)
+  :returns "string?"
+  :async true
+  :doc "Read a request header value by name."
+  :context :request)
+
+(define-io-primitive "request-content-type"
+  :params ()
+  :returns "string?"
+  :async true
+  :doc "Content-Type of the current request."
+  :context :request)
+
+
 ;; --------------------------------------------------------------------------
 ;; Tier 3: Signal primitives — reactive state for islands
 ;;