fix(syntax): reject bare apis-container bodies and cross-mode duplicate api names

Bare bodies inside apis {} silently discarded their text with no error,
producing a do-nothing block. They now throw a ParseError naming the entry
and pointing at the response {} section. Duplicate-name detection for
dataApis moved from an incremental, order-dependent check (only saw prior
entries in the array) to a single post-parse pass over the whole ast.dataApis,
so it catches cross-mode duplicates (apis {} vs ssr { api }) regardless of
declaration order.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

editors/vscode/src/compiler.cjs

@@ -1,6 +1,6 @@
 "use strict";
 // Generated by scripts/build-editor-compiler.mjs. Do not edit directly.
-// WRN editor compiler source hash: ed63852e856493749abcfd8160c27519e4b7e0d38e93e2b5cf64e94e29bf581f
+// WRN editor compiler source hash: d23177f63433ab92bc7d40d5d5967ed8eae783843224be091cc48be13747df6e
 // WRN editor compiler generator hash: a54ca847c758bc98d8e353ad6d70088df31de1820f6cf9d1c3462505f563e6b8
 // Generated with TypeScript: 6.0.3
 const __nodeRequire = require;
@@ -4798,7 +4798,6 @@ function parseApiSections(source) {
 function hasRequestSection(source) {
     return scanTopLevelBlocks(source, SECTION_NAMES).has("request");
 }
-const emptySections = { parameters: [], body: [], response: "", error: "" };
 /**
  * Parse the body of a page-level `apis { }` container: a sequence of
  * `<name> <METHOD> <path> { ... }` entries with no leading `api` keyword
@@ -4820,13 +4819,17 @@ function parseApiEntries(source) {
         }
         const path = lx.readPath();
         const entryBody = lx.readBalancedBraces();
+        const sections = parseApiSections(entryBody);
+        if (sections === null) {
+            throw new tokenizer_ts_1.LexError(`Api entry "${nameToken.value}" has a bare body; declare a "response { }" section instead`);
+        }
         entries.push({
             mode: "any",
             name: nameToken.value,
             method: methodToken.value.toUpperCase(),
             path,
             body: "",
-            sections: parseApiSections(entryBody) ?? emptySections,
+            sections,
         });
     }
     return entries;
@@ -6793,12 +6796,7 @@ function parse(source) {
                 case "apis": {
                     lx.next();
                     const body = lx.readBalancedBraces();
-                    for (const entry of (0, api_sections_ts_1.parseApiEntries)(body)) {
-                        if (dataApis.some((block) => block.name === entry.name)) {
-                            throw new ParseError(`Duplicate api entry "${entry.name}" in apis block`);
-                        }
-                        dataApis.push(entry);
-                    }
+                    dataApis.push(...(0, api_sections_ts_1.parseApiEntries)(body));
                     break;
                 }
                 default:
@@ -6872,6 +6870,13 @@ function parse(source) {
         };
         for (const name of namedLoads.keys())
             visitLoad(name);
+        const seenApiNames = new Set();
+        for (const block of dataApis) {
+            if (seenApiNames.has(block.name)) {
+                throw new ParseError(`Duplicate api entry "${block.name}"`, "WRN-API-DUPLICATE");
+            }
+            seenApiNames.add(block.name);
+        }
         return {
             type: "page",
             imports,

editors/vscode/src/extension.bundle.cjs

@@ -1,4 +1,4 @@
-// WRN editor extension source hash: e37604bc3978c372d7b76ee019cb883a5c284877a9be16e8740d7e1bddfde5c4
+// WRN editor extension source hash: eca15cff8b9c2ae1842cf584ab58b70c1d23327a30dd7aa36e9d0c50f1fe2ba9
 // WRN editor extension generator hash: 456d1d614e44e5fb1f19b784176c09cf2ade9b64ef73a17934c2698150b62728
 "use strict";
 var __commonJS = (cb, mod) => () => (mod || cb((mod = { exports: {} }).exports, mod), mod.exports);

editors/vscode/src/language-server.cjs

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-// WRN editor language server source hash: a5d091c01e106fd98dba6ef8bda030e821bf1f04ebeb63a6d12cc2d0783e93e2
+// WRN editor language server source hash: 7084da58f35fcb02c387b392d78660fa3b59f2060c765c3e982dd1918edab78a
 // WRN editor language server generator hash: f593a44aaf05495b789ce7a3086bee1eebb951b884d41c0e017bbcfe5f547e72
 // @bun @bun-cjs
 (function(exports, require, module, __filename, __dirname) {var __create = Object.create;
@@ -170869,7 +170869,6 @@ function parseApiSections(source) {
 function hasRequestSection(source) {
   return scanTopLevelBlocks(source, SECTION_NAMES).has("request");
 }
-var emptySections = { parameters: [], body: [], response: "", error: "" };
 function parseApiEntries(source) {
   const entries = [];
   const lx = new Lexer(source);
@@ -170884,13 +170883,17 @@ function parseApiEntries(source) {
     }
     const path = lx.readPath();
     const entryBody = lx.readBalancedBraces();
+    const sections = parseApiSections(entryBody);
+    if (sections === null) {
+      throw new LexError(`Api entry "${nameToken.value}" has a bare body; declare a "response { }" section instead`);
+    }
     entries.push({
       mode: "any",
       name: nameToken.value,
       method: methodToken.value.toUpperCase(),
       path,
       body: "",
-      sections: parseApiSections(entryBody) ?? emptySections
+      sections
     });
   }
   return entries;
@@ -171910,12 +171913,7 @@ function parse(source) {
         case "apis": {
           lx.next();
           const body = lx.readBalancedBraces();
-          for (const entry of parseApiEntries(body)) {
-            if (dataApis.some((block) => block.name === entry.name)) {
-              throw new ParseError(`Duplicate api entry "${entry.name}" in apis block`);
-            }
-            dataApis.push(entry);
-          }
+          dataApis.push(...parseApiEntries(body));
           break;
         }
         default:
@@ -171987,6 +171985,13 @@ function parse(source) {
     };
     for (const name2 of namedLoads.keys())
       visitLoad(name2);
+    const seenApiNames = new Set;
+    for (const block of dataApis) {
+      if (seenApiNames.has(block.name)) {
+        throw new ParseError(`Duplicate api entry "${block.name}"`, "WRN-API-DUPLICATE");
+      }
+      seenApiNames.add(block.name);
+    }
     return {
       type: "page",
       imports,

packages/syntax/src/api-sections.ts

@@ -172,8 +172,6 @@ export function hasRequestSection(source: string): boolean {
   return scanTopLevelBlocks(source, SECTION_NAMES).has("request");
 }
 
-const emptySections: ApiSections = { parameters: [], body: [], response: "", error: "" };
-
 /** Shape of an entry parsed from an `apis { }` container body. */
 export interface ApiEntry {
   mode: "any";
@@ -206,6 +204,12 @@ export function parseApiEntries(source: string): ApiEntry[] {
     }
     const path = lx.readPath();
     const entryBody = lx.readBalancedBraces();
+    const sections = parseApiSections(entryBody);
+    if (sections === null) {
+      throw new LexError(
+        `Api entry "${nameToken.value}" has a bare body; declare a "response { }" section instead`,
+      );
+    }
 
     entries.push({
       mode: "any",
@@ -213,7 +217,7 @@ export function parseApiEntries(source: string): ApiEntry[] {
       method: methodToken.value.toUpperCase(),
       path,
       body: "",
-      sections: parseApiSections(entryBody) ?? emptySections,
+      sections,
     });
   }
 

packages/syntax/src/parser.ts

@@ -853,12 +853,7 @@ export function parse(source: string): PageAst {
         case "apis": {
           lx.next();
           const body = lx.readBalancedBraces();
-          for (const entry of parseApiEntries(body)) {
-            if (dataApis.some((block) => block.name === entry.name)) {
-              throw new ParseError(`Duplicate api entry "${entry.name}" in apis block`);
-            }
-            dataApis.push(entry);
-          }
+          dataApis.push(...parseApiEntries(body));
           break;
         }
         default:
@@ -951,6 +946,15 @@ export function parse(source: string): PageAst {
       visited.add(name);
     };
     for (const name of namedLoads.keys()) visitLoad(name);
+
+    const seenApiNames = new Set<string>();
+    for (const block of dataApis) {
+      if (seenApiNames.has(block.name)) {
+        throw new ParseError(`Duplicate api entry "${block.name}"`, "WRN-API-DUPLICATE");
+      }
+      seenApiNames.add(block.name);
+    }
+
     return {
       type: "page",
       imports,

packages/syntax/test/apis-block.test.ts

@@ -69,3 +69,47 @@ test("duplicate names inside one container are rejected", () => {
     ),
   ).toThrow(/duplicate/i);
 });
+
+test("a bare body inside apis {} is a parse error naming response", () => {
+  expect(() => parse(page(`    bare GET /api/z { return data }`))).toThrow(/response/i);
+});
+
+test("apis entry followed by an ssr api of the same name is rejected", () => {
+  const src = `page Repro {
+  apis {
+    foo GET /api/foo { response { return data } }
+  }
+
+  ssr {
+    api foo GET /api/foo { return data }
+  }
+
+  view { <main>x</main> }
+}
+`;
+  expect(() => parse(src)).toThrow(/duplicate/i);
+});
+
+test("ssr api followed by an apis entry of the same name is rejected", () => {
+  const src = `page Repro {
+  ssr {
+    api foo GET /api/foo { return data }
+  }
+
+  apis {
+    foo GET /api/foo { response { return data } }
+  }
+
+  view { <main>x</main> }
+}
+`;
+  expect(() => parse(src)).toThrow(/duplicate/i);
+});
+
+test("an explicit empty response section is accepted, unlike a bare body", () => {
+  const ast = parse(page(`    empty GET /api/e { response { } }`));
+
+  const block = ast.dataApis[0]!;
+  expect(block.name).toBe("empty");
+  expect(block.sections?.response.trim()).toBe("");
+});