fix(review): rank long-form doc extensions in diffFilePriority

src/review/review-diff.ts

@@ -22,7 +22,7 @@ export const DEFAULT_DIFF_BUDGET = 80_000;
 export function diffFilePriority(path: string): number {
   if (/(^|\/)(package-lock\.json|pnpm-lock\.yaml|yarn\.lock|bun\.lockb|cargo\.lock|poetry\.lock|composer\.lock|go\.sum)$|\.(min\.(js|css)|map|snap)$/i.test(path)) return 4;
   if (/(^|\/)(dist|build|out|coverage|vendor|node_modules)\//i.test(path)) return 4;
-  if (/\.(md|mdx|rst|txt|adoc)$/i.test(path)) return 2;
+  if (/\.(md|mdx|markdown|rst|adoc|asciidoc|txt)$/i.test(path)) return 2;
   if (isTestPath(path)) return 1;
   return 0; // source code
 }

src/review/review-grounding.ts

@@ -112,7 +112,7 @@ export function buildGrounding(f: GroundingFlags, checks?: CheckAggregate, fileC
 export function diffFilePriority(path: string): number {
   if (/(^|\/)(package-lock\.json|pnpm-lock\.yaml|yarn\.lock|bun\.lockb|cargo\.lock|poetry\.lock|composer\.lock|go\.sum)$|\.(min\.(js|css)|map|snap)$/i.test(path)) return 4;
   if (/(^|\/)(dist|build|out|coverage|vendor|node_modules)\//i.test(path)) return 4;
-  if (/\.(md|mdx|rst|txt|adoc)$/i.test(path)) return 2;
+  if (/\.(md|mdx|markdown|rst|adoc|asciidoc|txt)$/i.test(path)) return 2;
   if (isTestPath(path)) return 1;
   return 0; // source code
 }

test/unit/review-diff.test.ts

@@ -11,6 +11,13 @@ describe("diffFilePriority — source survives, noise drops first", () => {
     expect(diffFilePriority("app.min.css")).toBe(4);
   });
 
+  it("ranks long-form doc spellings as docs(2), matching rag.ts and path-matchers", () => {
+    for (const path of ["GUIDE.markdown", "docs/spec.asciidoc", "notes.ADOC"]) {
+      expect(diffFilePriority(path)).toBe(2);
+      expect(diffFilePriority(path)).toBeGreaterThan(diffFilePriority("src/a.ts"));
+    }
+  });
+
   it("ranks every canonical test convention as tests(1), not source(0)", () => {
     // These are all tests; before delegating to isTestPath the inline regex missed them and ranked
     // them SOURCE(0), so on a tight budget they could displace real source (the opposite of the goal).

test/unit/review-grounding.test.ts

@@ -102,6 +102,13 @@ describe("review-grounding: diffFilePriority (source survives the budget first)"
     expect(diffFilePriority("src/a.ts")).toBeLessThan(diffFilePriority("README.md"));
   });
 
+  it("ranks long-form doc spellings as docs(2), matching rag.ts and path-matchers", () => {
+    for (const path of ["GUIDE.markdown", "docs/spec.asciidoc", "notes.ADOC"]) {
+      expect(diffFilePriority(path)).toBe(2);
+      expect(diffFilePriority(path)).toBeGreaterThan(diffFilePriority("src/a.ts"));
+    }
+  });
+
   it("ranks every canonical test convention as tests(1) so real source is inlined first", () => {
     for (const path of [
       "e2e/checkout.cy.ts", // Cypress