fix(agents): count all Markdown line endings in budgets

docs/development/agent-workflow.md

@@ -29,6 +29,7 @@ Later normal edits maintain the canonical docs, not duplicate historical prose.
 
 Run `pnpm run agents:validate` after guidance changes. It checks line/byte budgets,
 root imports and local navigation links/anchors, including migration destinations.
+Line budgets count LF, CRLF and standalone CR endings consistently.
 Markdown navigation is parsed with the already-declared `marked` dependency;
 undefined explicit references (including shortcut images) are errors, and code examples are excluded.
 Backticked concrete paths in root guidance and the context map are checked from

tools/skills/validate-agent-guidance.mjs

@@ -157,7 +157,9 @@ export async function validateAgentGuidance({ rootDir }) {
             const lines =
                 markdown === ''
                     ? 0
-                    : markdown.replace(/\r?\n$/u, '').split(/\r?\n/u).length;
+                    : markdown
+                          .replace(/(?:\r\n|[\r\n])$/u, '')
+                          .split(/\r\n|[\r\n]/u).length;
             const bytes = Buffer.byteLength(markdown, 'utf8');
             if (lines > maxLines)
                 diagnostics.push(

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

@@ -1081,3 +1081,31 @@ test('valid image-map navigation and inert areas pass', async (t) => {
         []
     );
 });
+
+for (const ending of ['\n', '\r\n', '\r']) {
+    for (const [source, limit] of [
+        ['AGENTS.md', 200],
+        ['CLAUDE.md', 30],
+    ]) {
+        test(`line budget handles ${JSON.stringify(ending)} in ${source}`, async (t) => {
+            const lines = [
+                source === 'CLAUDE.md' ? '@AGENTS.md' : '# Guidance',
+                ...Array(limit - 1).fill('# Section'),
+            ];
+            assert.deepEqual(
+                await diagnostics(t, { [source]: lines.join(ending) + ending }),
+                []
+            );
+            const result = await diagnostics(t, {
+                [source]: [...lines, '# Extra'].join(ending) + ending,
+            });
+            assert.ok(
+                result.some((message) =>
+                    message.includes(
+                        `at most ${limit} lines allowed (received ${limit + 1})`
+                    )
+                )
+            );
+        });
+    }
+}