fix(agents): exclude www autolinks from import scanning

docs/development/agent-workflow.md

@@ -73,7 +73,7 @@ SVG image/use hrefs (including xlink), HTML image-input, video, audio, source an
 existence checks as images. Entity decoding uses full HTML text/attribute rules,
 including references whose semicolon may be omitted.
 Inline guidance imports are rejected after punctuation as well as whitespace.
-At-signs inside external URIs (including explicit opaque autolinks such as mailto) are excluded
+At-signs inside external URIs (including www autolinks and explicit opaque autolinks such as mailto) are excluded
 per HTML text node, preserving adjacent imports. A colon directly before an import
 does not make that import a URI. Opaque schemes are excluded only in parsed links
 whose visible text equals their URI, so colon-labeled prose remains checked.
@@ -82,6 +82,8 @@ Extensionless inline candidates are also imports when they resolve to repository
 checking the full filename before prefixes at ASCII/Unicode prose separators,
 including opening parentheses, brackets and braces. Each at-sign candidate is
 checked independently, including imports nested next to a package mention.
+An at-sign inside a word (for example, foo@INSTRUCTIONS or an email address)
+is not an import boundary, including within parenthetical prose.
 Declared scoped dependencies, scope wildcards and matching TypeScript path aliases
 are recognized as package/alias mentions. Traversal and document-file imports are
 rejected before those exemptions, including document paths with fragments or queries.

tools/skills/agent-guidance-markdown.mjs

@@ -181,7 +181,7 @@ export function guidanceProse(markdown) {
         }
         if (node.nodeName === '#text')
             return node.value.replace(
-                /(?:\b[a-z][a-z\d+.-]*:\/\/|\/\/)[^\s]*?(?=[)\]}>][.,;:!?]*@|\s|$)/giu,
+                /(?:\b[a-z][a-z\d+.-]*:\/\/|\/\/|\bwww\.)[^\s]*?(?=[)\]}>][.,;:!?]*@|\s|$)/giu,
                 (url, offset) => {
                     const opening = (
                         preceding + node.value.slice(0, offset)

tools/skills/validate-agent-guidance.test.mjs

@@ -1812,3 +1812,41 @@ test('federated handle cannot hide a nested import', async (t) => {
         ).some((message) => message.includes('additional or inline'))
     );
 });
+
+test('www autolinks do not introduce guidance imports', async (t) => {
+    assert.deepEqual(
+        await diagnostics(t, {
+            'AGENTS.md': 'See www.example.com/@docs/guide',
+        }),
+        []
+    );
+});
+for (const prose of [
+    'www.example.com/path).@docs/guide.md',
+    '"www.example.com/path".@docs/guide.md',
+]) {
+    test(`www URL preserves adjacent import: ${prose}`, async (t) => {
+        assert.ok(
+            (
+                await diagnostics(t, {
+                    'CLAUDE.md': '@AGENTS.md\n\n' + prose,
+                })
+            ).some((message) => message.includes('additional or inline'))
+        );
+    });
+}
+for (const prose of [
+    'foo@INSTRUCTIONS',
+    '@alice@example.social(foo@INSTRUCTIONS)',
+    '@alice@example.social(email@example.com)',
+]) {
+    test(`embedded at-sign is not an import boundary: ${prose}`, async (t) => {
+        assert.deepEqual(
+            await diagnostics(t, {
+                'AGENTS.md': prose,
+                INSTRUCTIONS: 'Guidance',
+            }),
+            []
+        );
+    });
+}