Fix empty code blocks: rename ~docs/code param, fix batched IO dispatch

Two bugs caused code blocks to render empty across the site:

1. ~docs/code component had parameter named `code` which collided with
   the HTML <code> tag name. Renamed to `src` and updated all 57
   callers. Added font-mono class for explicit monospace.

2. Batched IO dispatch in ocaml_bridge.py only skipped one leading
   number (batch ID) but the format has two (epoch + ID):
   (io-request EPOCH ID "name" args...). Changed to skip all leading
   numbers so the string name is correctly found. This fixes highlight
   and other batchable helpers returning empty results.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

sx/sx/sx-urls.sx

@@ -16,7 +16,7 @@
          "a flat sequence of slash-separated path segments, the URL encodes "
          "a nested function call that the server evaluates to produce a page.")
       (p "Every page on this site is addressed by an SX URL. You are currently reading:")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         "/sx/(applications.(sx-urls))"
         "lisp"))
       (p "This is a function call: " (code "applications") " is called with the result of "
@@ -34,7 +34,7 @@
       (p "The rule: " (strong "dot = space, nothing more") ". "
          "Before parsing, the server replaces every dot with a space. "
          "Parens carry all structural meaning.")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; What you type in the browser:\n/(language.(doc.introduction))\n\n;; After dot→space transform:\n(language (doc introduction))\n\n;; This is standard SX. Parens are nesting. Atoms are arguments.\n;; 'introduction' is a string slug, 'doc' is a function, 'language' is a function."
         "lisp"))
 
@@ -58,12 +58,12 @@
       (p "REST URLs have an inherent ambiguity: "
          "does a filter apply to the last segment, or the whole path? "
          "S-expression nesting makes scope explicit.")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; REST — ambiguous:\n/users/123/posts?filter=published\n;; Does 'filter' apply to posts? To the user? To the whole query?\n;; The answer depends on API documentation.\n\n;; SX URLs — explicit scoping:\n/(users.(posts.123.(filter.published)))   ;; filter scoped to posts\n/(users.posts.123.(filter.published))     ;; filter scoped to the whole expression\n\n;; These are structurally different. The paren boundaries ARE scope boundaries.\n;; No documentation needed — the syntax tells you."
         "lisp"))
 
       (p "This extends to every level of nesting on this site:")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; These all have different scoping:\n/(language.(spec.signals))              ;; 'signals' scoped to spec\n/(language.(spec.(explore.signals)))     ;; 'signals' scoped to explore\n/(language.(spec.(explore.signals.:section.\"batch\")))  ;; keyword scoped to explore call"
         "lisp"))
       (p "What took REST thirty years of convention documents to approximate, "
@@ -103,7 +103,7 @@
       (~docs/subsection :title "Leaf pages"
         (p "Leaf pages are the innermost function calls. "
            "The slug becomes a string argument to the page function:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; doc(\"introduction\") — the slug auto-quotes to a string\n/(language.(doc.introduction))\n\n;; spec(\"core\") — same pattern, different function\n/(language.(spec.core))\n\n;; explore(\"signals\") — nested deeper\n/(language.(spec.(explore.signals)))\n\n;; example(\"progress-bar\") — three levels of nesting\n/(geography.(hypermedia.(example.progress-bar)))"
           "lisp"))
 
@@ -153,7 +153,7 @@
     (~docs/section :title "Direct Component URLs" :id "direct"
       (p "Every " (code "defcomp") " in the component environment is directly "
          "addressable by its " (code "~name") " — no page function, no routing wiring, no case statement.")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; Any component is instantly a URL:\n/(~essays/sx-sucks/essay-sx-sucks)                ;; the essay\n/(~plans/sx-urls/plan-sx-urls-content)            ;; the SX URLs plan\n/(~docs-content/docs-evaluator-content)           ;; evaluator docs\n/(~analyzer/bundle-analyzer-content)              ;; bundle analyzer tool"
         "lisp"))
       (p "Try it:")
@@ -176,17 +176,17 @@
       (~docs/subsection :title "Section functions pass through"
         (p (code "language") ", " (code "geography") ", " (code "applications") ", " (code "etc")
            " are identity on their argument. They exist to provide structure:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Section function definition:\n(define language\n  (fn (content)\n    (if (nil? content) nil content)))\n\n;; /(language.(doc.introduction))\n;; Eval steps:\n;;   1. (doc \"introduction\") → page content AST\n;;   2. (language <content>) → passes content through\n;;   3. Wrap in (~layouts/doc :path \"...\" <content>)"
           "lisp"))
         (p "Section functions with no argument return their index page:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           "(define home\n  (fn (content)\n    (if (nil? content) '(~docs-content/home-content) content)))\n\n;; /(home) → (~docs-content/home-content)\n;; /       → same thing"
           "lisp")))
 
       (~docs/subsection :title "Page functions dispatch on slug"
         (p "Page functions take a slug string and return a quoted component expression:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           "(define doc\n  (fn (slug)\n    (if (nil? slug)\n      '(~docs-content/docs-introduction-content)\n      (case slug\n        \"introduction\" '(~docs-content/docs-introduction-content)\n        \"getting-started\" '(~docs-content/docs-getting-started-content)\n        \"components\" '(~docs-content/docs-components-content)\n        \"evaluator\" '(~docs-content/docs-evaluator-content)\n        \"primitives\"\n          (let ((data (primitives-data)))\n            `(~docs-content/docs-primitives-content\n               :prims (~docs/primitives-tables :primitives ,data)))\n        :else '(~docs-content/docs-introduction-content)))))"
           "lisp"))
         (p "The " (code "'") " (quote) is critical: page functions return "
@@ -197,7 +197,7 @@
       (~docs/subsection :title "Data-dependent pages"
         (p "Some pages need server data. The page function calls an IO helper, "
            "then splices data into the component call with quasiquote:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           "(define isomorphism\n  (fn (slug)\n    (case slug\n      \"bundle-analyzer\"\n        (let ((data (bundle-analyzer-data)))    ;; IO: reads component env\n          `(~analyzer/bundle-analyzer-content\n            :pages ,(get data \"pages\")\n            :total-components ,(get data \"total-components\")\n            :pure-count ,(get data \"pure-count\")\n            :io-count ,(get data \"io-count\")))\n      :else '(~plans/isomorphic/plan-isomorphic-content))))"
           "lisp"))
         (p "Visit "
@@ -213,7 +213,7 @@
          "The handler does four things:")
 
       (~docs/subsection :title "The handler"
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Python handler (sx_router.py) — simplified:\n\nasync def eval_sx_url(raw_path):\n    # 1. Build env: all components + all page functions\n    env = get_component_env() | get_page_helpers(\"sx\")\n\n    # 2. Spec function: parse URL, auto-quote unknowns\n    #    This is bootstrapped from router.sx → sx_ref.py\n    expr = prepare_url_expr(path, env)\n\n    # 3. Evaluate: page functions resolve, data fetched\n    page_ast = await async_eval(expr, env, ctx)\n\n    # 4. Wrap in layout, render to HTML\n    wrapped = [Symbol(\"~layouts/doc\"), Keyword(\"path\"), path, page_ast]\n    content_sx = await _eval_slot(wrapped, env, ctx)\n    return full_page_sx(content_sx)"
           "python"))
         (p "The handler imports " (code "prepare_url_expr") " from the bootstrapped "
@@ -225,7 +225,7 @@
            ", all three atoms are symbols. But " (code "introduction")
            " isn't a function — it's a slug. The " (code "auto-quote-unknowns") " function "
            "walks the AST and replaces unknown symbols with their string name:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From router.sx — the auto-quoting spec:\n(define auto-quote-unknowns :effects []\n  (fn (expr env)\n    (if (not (list? expr)) expr\n      (if (empty? expr) expr\n        ;; Head stays as symbol (function position)\n        (cons (first expr)\n              (map (fn (child)\n                     (cond\n                       (list? child)\n                         (auto-quote-unknowns child env)\n                       (= (type-of child) \"symbol\")\n                         (let ((name (symbol-name child)))\n                           (if (or (env-has? env name)\n                                   (starts-with? name \":\")\n                                   (starts-with? name \"~\")\n                                   (starts-with? name \"!\"))\n                             child     ;; known → keep as symbol\n                             name))    ;; unknown → string\n                       :else child))\n                   (rest expr)))))))"
           "lisp"))
         (p "This is checked against the " (em "actual environment") " at request time — "
@@ -236,7 +236,7 @@
         (p "API endpoints are defined with " (code "defhandler") " and use the same "
            "nested SX URL structure. These are live endpoints on this site — "
            "they return SX wire format that the client renders:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From sx/sx/handlers/ref-api.sx — live API endpoint:\n(defhandler ref-time :method \"GET\"\n  :path \"/sx/(geography.(hypermedia.(reference.(api.time))))\"\n  (span :id \"time\" (str \"Server time: \" (format-time (now)))))\n\n;; The endpoint is an SX expression that returns SX.\n;; The URL IS the address. The handler IS the content."
           "lisp"))
         (p "Try these live endpoints — each returns SX wire format:")
@@ -259,7 +259,7 @@
         (p "More handler examples from the "
            (a :href "/sx/(geography.(hypermedia.(reference.attributes)))"
               :class "text-violet-600 hover:underline" "attributes reference") ":")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; POST handler — receives form data, returns SX:\n(defhandler ref-greet :method \"POST\"\n  :path \"/sx/(geography.(hypermedia.(reference.(api.greet))))\"\n  (let ((name (request-form \"name\")))\n    (div :id \"result\" :class \"p-4 border rounded\"\n      (p (str \"Hello, \" (if (empty? name) \"world\" name) \"!\")))))\n\n;; DELETE handler — receives path parameter:\n(defhandler ref-delete-item :method \"DELETE\"\n  :path \"/sx/(geography.(hypermedia.(reference.(api.(item.<sx:item_id>)))))\"\n  \"\")\n\n;; GET handler with query params:\n(defhandler ref-trigger-search :method \"GET\"\n  :path \"/sx/(geography.(hypermedia.(reference.(api.trigger-search))))\"\n  (let ((q (request-arg \"q\")))\n    (div :id \"search-results\"\n      (p (str \"Results for: \" q)))))"
           "lisp"))))
 
@@ -270,7 +270,7 @@
          "without a server round-trip.")
 
       (~docs/subsection :title "The client route check"
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From orchestration.sx — client-side route decision:\n;;\n;; 1. Match the URL against the page registry\n;; 2. Check if target layout matches current layout\n;; 3. Check if all component dependencies are loaded\n;; 4. If pure (no IO): render client-side, no server request\n;; 5. If data-dependent: fetch data, then render\n;; 6. If layout changes: fall through to server (needs OOB header)\n\n(define try-client-route :effects [mutation io]\n  (fn (pathname target-sel)\n    (let ((match (find-matching-route pathname _page-routes)))\n      (if (nil? match)\n        false   ;; no match → server handles it\n        (if (not (= (get match \"layout\") (current-page-layout)))\n          false ;; layout change → server (needs OOB update)\n          ;; ... render client-side\n          )))))"
           "lisp"))
         (p "Pure pages (no " (code "has-data") " flag) render instantly in the browser. "
@@ -281,7 +281,7 @@
         (p "The " (code "prepare-url-expr") " function from " (code "router.sx") " is bootstrapped "
            "to JavaScript as " (code "Sx.prepareUrlExpr") ". The browser uses it for "
            "client-side navigation, relative URL resolution, and the address bar REPL:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From router.sx — bootstrapped to both Python and JavaScript:\n(define prepare-url-expr :effects []\n  (fn (url-path env)\n    (let ((expr (url-to-expr url-path)))\n      (if (empty? expr)\n        expr\n        (auto-quote-unknowns expr env)))))\n\n;; url-to-expr: strip /, dots→spaces, parse\n;; auto-quote-unknowns: unknown symbols → strings\n;; Result: ready for standard eval"
           "lisp"))
         (p "One spec, two hosts. The Python server and JavaScript client share "
@@ -298,7 +298,7 @@
       (~docs/subsection :title "One dot: apply at current level"
         (p "A single dot appends at the current nesting depth. "
            "It's like calling a function with an extra argument:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Current page: /(geography.(hypermedia.(example.progress-bar)))\n;;\n;; .click-to-load\n;; = \"at the current level, apply click-to-load\"\n;; → /(geography.(hypermedia.(example.click-to-load)))\n;;\n;; The inner expression (example.progress-bar) becomes (example.click-to-load).\n;; The outer nesting (geography.(hypermedia.(...))) is preserved."
           "lisp"))
         (p "This is a sibling navigation — same parent, different leaf."))
@@ -306,21 +306,21 @@
       (~docs/subsection :title "Two dots: pop one level, apply"
         (p "Two dots remove the innermost nesting level, then optionally apply a new one. "
            "Like " (code "cd ..") " in a filesystem — but structural, not string-based:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Current: /(geography.(hypermedia.(example.progress-bar)))\n;;\n;; ..                    → /(geography.(hypermedia.(example)))\n;; ..inline-edit         → /(geography.(hypermedia.(example.inline-edit)))\n;; ..reference           → /(geography.(hypermedia.(reference)))\n;;\n;; Pop the innermost expression, replace with the new slug.\n;; The outer nesting is preserved."
           "lisp")))
 
       (~docs/subsection :title "Three+ dots: pop multiple levels"
         (p "Each additional dot pops one more level of nesting. "
            "N dots = pop N-1 levels:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Current: /(geography.(hypermedia.(example.progress-bar)))\n;;\n;; ...           → /(geography.(hypermedia))       ;; pop 2 levels\n;; ....          → /(geography)                    ;; pop 3 levels\n;; .....         → /                               ;; pop 4 levels (root)\n;;\n;; Combine with a slug to navigate across sections:\n;; ...reactive.(examples)  → /(geography.(reactive.(examples)))  ;; pop 2, into reactive\n;; ....language.(doc.intro)\n;;   → /(language.(doc.intro))                       ;; pop 3, into language"
           "lisp")))
 
       (~docs/subsection :title "Why this is functional, not textual"
         (p "REST relative URLs are string operations — remove path segments, append new ones. "
            "This breaks when the hierarchy is structural rather than linear.")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; REST relative: ../inline-edit on /geography/hypermedia/examples/progress-bar\n;; → /geography/hypermedia/examples/inline-edit\n;; Works! But only because the hierarchy happens to be flat.\n\n;; What about navigating to a sibling section?\n;; REST: ../../reference/attributes\n;; How many ../ do you need? You have to count path segments.\n;; The answer changes if the base path changes.\n\n;; SX relative: ..reference.attributes\n;; from /(geography.(hypermedia.(example.progress-bar)))\n;; → /(geography.(hypermedia.(reference.attributes)))\n;;\n;; The dots operate on nesting depth, not string segments.\n;; Add a level of nesting? The relative URL still works.\n;; Restructure the tree? Relative links within a subtree are unaffected."
           "lisp"))
         (p "Relative SX URLs are " (em "structurally stable") " — "
@@ -329,7 +329,7 @@
       (~docs/subsection :title "Keyword arguments: functional parameters"
         (p "URLs can carry keyword arguments that parameterize the innermost expression. "
            "Keywords use the same " (code ":name") " syntax as SX function calls:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Set a keyword on a page:\n/(language.(spec.(explore.signals.:page.3)))\n→ (language (spec (explore signals :page 3)))\n\n;; :page is a keyword argument to the explore function.\n;; It's the same syntax you'd use when calling a component:\n;; (~paginator :current-page 3 :total-pages 10)\n\n;; Delta values — relative keyword modification:\n;; .:page.+1   → increment current :page by 1\n;; .:page.-1   → decrement current :page by 1\n;;\n;; This is pagination as URL algebra:\n;; Current: /(language.(spec.(explore.signals.:page.3)))\n;; .:page.+1 → /(language.(spec.(explore.signals.:page.4)))\n;; No JavaScript, no state management. A URL transform."
           "lisp")))
 
@@ -337,7 +337,7 @@
         (p "Relative resolution is defined in " (code "router.sx") " as a pure function. "
            "It parses the current URL's expression structure, pops levels, "
            "splices the new content, and serializes back:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From router.sx — pure function, no IO:\n(define resolve-relative-url :effects []\n  (fn (current-url relative-url)\n    ;; Parse current URL's expression\n    ;; Count dots to determine pop level\n    ;; Pop that many nesting levels\n    ;; Append new content\n    ;; Serialize back to URL format\n    ...))\n\n;; Tested with 50+ cases in test-router.sx:\n(resolve-relative-url\n  \"/sx/(geography.(hypermedia.(example.progress-bar)))\"\n  \"..inline-edit\")\n→ \"/sx/(geography.(hypermedia.(example.inline-edit)))\"\n\n(resolve-relative-url\n  \"/sx/(language.(spec.(explore.signals.:page.3)))\"\n  \".:page.+1\")\n→ \"/sx/(language.(spec.(explore.signals.:page.4)))\""
           "lisp"))
         (p "This function is bootstrapped to both Python and JavaScript. "
@@ -386,7 +386,7 @@
       (~docs/subsection :title "How special forms are parsed"
         (p "The " (code "parse-sx-url") " function in " (code "router.sx") " detects and "
            "decomposes special form URLs:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; From router.sx — special form detection:\n(define parse-sx-url :effects []\n  (fn (url)\n    ;; Returns a typed descriptor:\n    ;; {:type \"special-form\" :form \"!source\" :inner \"(~essay)\"}\n    ;; {:type \"absolute\" :raw \"/(language.(doc.intro))\"}\n    ;; {:type \"relative\" :raw \"..eval\"}\n    ;; {:type \"direct-component\" :name \"~essay-sx-sucks\"}\n    ...))\n\n;; The ! prefix is detected in the expression head:\n;; /(!source.(~essay)) → head is !source → special form\n;; /(language.(doc.intro)) → head is language → normal\n\n;; Each special form takes the inner expression as its argument:\n;; !source wraps whatever follows in a source viewer\n;; !inspect wraps whatever follows in an analysis view\n;; !diff takes two inner expressions"
           "lisp"))
         (p "Special forms compose with the rest of the URL algebra. "
@@ -427,26 +427,26 @@
       (~docs/subsection :title "Step 1: Parse"
         (p "Strip the leading " (code "/") ", replace dots with spaces, parse as SX. "
            "This is the " (code "url-to-expr") " function from " (code "router.sx") ":")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Input:  /sx/(language.(doc.introduction))\n;; Strip prefix:  (language.(doc.introduction))\n;; Dots→spaces:   (language (doc introduction))\n;; Parse:         [Symbol(\"language\"), [Symbol(\"doc\"), Symbol(\"introduction\")]]"
           "lisp")))
 
       (~docs/subsection :title "Step 2: Auto-quote"
         (p "Unknown symbols become strings. Known functions stay as symbols. "
            "This is " (code "auto-quote-unknowns") " — checked against the live env:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; 'language' is in env (section function) → stays Symbol\n;; 'doc' is in env (page function) → stays Symbol\n;; 'introduction' is NOT in env → becomes \"introduction\"\n;;\n;; Result: [Symbol(\"language\"), [Symbol(\"doc\"), \"introduction\"]]"
           "lisp")))
 
       (~docs/subsection :title "Step 3: Evaluate"
         (p "Standard inside-out evaluation — same as any SX expression:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; 1. Eval \"introduction\" → \"introduction\" (string, self-evaluating)\n;; 2. Eval (doc \"introduction\") → calls doc function\n;;    → returns '(~docs-content/docs-introduction-content)\n;; 3. Eval (language <ast>) → calls language function\n;;    → passes content through (identity)\n;; 4. Result: [Symbol(\"~docs-content/docs-introduction-content\")]"
           "lisp")))
 
       (~docs/subsection :title "Step 4: Wrap and render"
         (p "The router wraps the result in " (code "~layouts/doc") " with the URL as " (code ":path") ":")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Wrap:   (~layouts/doc :path \"/sx/(language.(doc.introduction))\" <content>)\n;; Render: aser expands ~layouts/doc → nav, breadcrumbs, layout shell\n;;         aser expands ~docs-content/docs-introduction-content → page HTML\n;; Return: full HTML page (or OOB wire format for HTMX requests)"
           "lisp")))
 
@@ -473,14 +473,14 @@
 
       (~docs/subsection :title "sx-get — HTMX-style fetching"
         (p (code "sx-get") " fetches content from an SX URL and swaps it into the DOM:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Fetch and swap a section:\n(div :sx-get \"/sx/(geography.(hypermedia.(example.progress-bar)))\"\n     :sx-trigger \"click\"\n     :sx-target \"#content\"\n     :sx-swap \"innerHTML\"\n  \"Load Progress Bar Example\")\n\n;; Paginated content with keyword deltas:\n(button :sx-get \".:page.+1\"\n        :sx-trigger \"click\"\n        :sx-target \"#results\"\n        :sx-swap \"innerHTML\"\n  \"Next Page\")"
           "lisp")))
 
       (~docs/subsection :title "Pagination — URLs as algebra"
         (p "The relative URL algebra makes pagination trivial. "
            "No state, no event handlers — just URLs:")
-        (~docs/code :code (highlight
+        (~docs/code :src (highlight
           ";; Paginator component — pure URL navigation:\n(defcomp ~paginator (&key current-page total-pages)\n  (nav :class \"flex gap-2\"\n    (when (> current-page 1)\n      (a :href \".:page.-1\" \"Previous\"))  ;; delta: decrement :page\n    (span (str \"Page \" current-page \" of \" total-pages))\n    (when (< current-page total-pages)\n      (a :href \".:page.+1\" \"Next\"))))   ;; delta: increment :page\n\n;; On /(language.(spec.(explore.signals.:page.3))):\n;;   \"Previous\" → .:page.-1 → :page becomes 2\n;;   \"Next\"     → .:page.+1 → :page becomes 4\n;;\n;; Each link is a static href. Server renders the right page.\n;; Back button works. Bookmarkable. Shareable. Cacheable."
           "lisp"))))
 
@@ -548,7 +548,7 @@
         (li (strong "No client library") " — " (code "curl") " returns content"))
 
       (p "HTTP verbs align naturally with SX URL semantics:")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; GET — pure evaluation, cacheable:\nGET /sx/(language.(doc.introduction))\n\n;; POST — side effects via defhandler:\nPOST /sx/(geography.(hypermedia.(reference.(api.greet))))\n\n;; DELETE — with path parameters:\nDELETE /sx/(geography.(hypermedia.(reference.(api.(item.42)))))\n\n;; PUT — full replacement:\nPUT /sx/(geography.(hypermedia.(example.(api.putpatch))))"
         "lisp")))
 
@@ -560,7 +560,7 @@
          "special form detection, and auto-quoting as pure functions.")
 
       (p "Key functions:")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; URL → expression (dots→spaces, parse):\n(url-to-expr \"(language.(doc.intro))\")\n→ (language (doc intro))\n\n;; Auto-quote unknowns against env:\n(auto-quote-unknowns '(language (doc intro)) env)\n→ (language (doc \"intro\"))     ;; intro not in env → string\n\n;; Full pipeline:\n(prepare-url-expr \"(language.(doc.intro))\" env)\n→ (language (doc \"intro\"))     ;; ready for eval\n\n;; Classify URL type:\n(parse-sx-url \"/sx/(language.(doc.intro))\")\n→ {:type \"absolute\" :raw \"/sx/(language.(doc.intro))\"}\n\n(parse-sx-url \"/sx/(!source.(~essay))\")\n→ {:type \"special-form\" :form \"!source\" :inner \"(~essay)\"}\n\n(parse-sx-url \"..eval\")\n→ {:type \"relative\" :raw \"..eval\"}\n\n;; Resolve relative URLs:\n(resolve-relative-url\n  \"/sx/(geography.(hypermedia.(example.progress-bar)))\"\n  \"..inline-edit\")\n→ \"/sx/(geography.(hypermedia.(example.inline-edit)))\""
         "lisp"))
 
@@ -574,7 +574,7 @@
     ;; -----------------------------------------------------------------
     (~docs/section :title "The Lisp Tax" :id "parens"
       (p "People will object to the parentheses. Consider what they already accept:")
-      (~docs/code :code (highlight
+      (~docs/code :src (highlight
         ";; Developers write this every day:\nhttps://api.site.com/v2/users/123/posts?filter=published&sort=date&order=desc&limit=10\n\n;; And would complain about this?\nhttps://site.com/(users.(posts.123.(filter.published.sort.date.limit.10)))\n\n;; The second is shorter, structured, unambiguous, and composable."
         "lisp"))