test(fleet): stabilize documentation surface scan

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/fleet/NORTH_STAR.yaml

@@ -97,7 +97,7 @@ success_criteria:
   - id: AC-NS-7
     text: >-
       A user-customized persona (edited or added via the orchestrator) survives
-      `mosaic update`: baseline reseed never clobbers user overrides.
+      mosaic update: baseline reseed never clobbers user overrides.
 
 workstreams:
   - id: A

docs/fleet/PRD.md

@@ -97,8 +97,8 @@ observability and no safe way to watch a session.
   is an intentional fail-closed design (FR-5).
 - **agent watch uses a grouped viewer session:** tmux attach -r directly against the
   agent session lets the viewer terminal shrink the agent's window. agent watch instead
-  creates a throwaway grouped session (`tmux new-session -d -t '=<agent>' -s
-'<agent>-watch-<pid>'`), attaches read-only to that session, and kills it on detach.
+  creates a throwaway grouped session (tmux new-session -d -t '=<agent>' -s
+  '<agent>-watch-<pid>'), attaches read-only to that session, and kills it on detach.
   The grouped session shares the agent's windows but has independent sizing, so the
   agent's window is never affected. tmux attach is still interactive and requires
   inherited stdio; the `interactiveRunner` handles TTY passthrough.

packages/mosaic/src/fleet/fleet-documentation.spec.ts

@@ -483,15 +483,11 @@ function codeSurfaceDiagnostics(path: string, source: string): SurfaceDiagnostic
       diagnostics.push({ path, line: lineNumber, code: 'indented-code' });
       continue;
     }
-    if (/`{2,}/.test(line) && !/^```[a-z-]+$/.test(line)) {
-      diagnostics.push({ path, line: lineNumber, code: 'inline-delimiter' });
-      continue;
-    }
     const marker = line.match(/^(`{3,}|~{3,})(.*)$/);
     if (marker !== null) {
       block += 1;
       const info = marker[2] ?? '';
-      if (marker[1] !== '```') {
+      if (marker[1] !== '```' || /[`~]/.test(info)) {
         diagnostics.push({ path, line: lineNumber, block, code: 'fence-marker' });
         continue;
       }
@@ -507,6 +503,15 @@ function codeSurfaceDiagnostics(path: string, source: string): SurfaceDiagnostic
       inFence = true;
       continue;
     }
+    if (/`{2,}/.test(line)) {
+      diagnostics.push({ path, line: lineNumber, code: 'inline-delimiter' });
+      continue;
+    }
+    const withoutClosedInlineSpans = line.replace(/`[^`\n]+`/g, '');
+    if (withoutClosedInlineSpans.includes('`')) {
+      diagnostics.push({ path, line: lineNumber, code: 'inline-delimiter' });
+      continue;
+    }
     if (/<\/?(?:pre|code|script|style|xmp|listing)(?=$|\s|[>/])/i.test(line)) {
       diagnostics.push({ path, line: lineNumber, code: 'raw-code-container' });
     }
@@ -702,8 +707,38 @@ describe('closed documentation publication grammar', (): void => {
     }
   });
 
+  it('rejects unmatched single-backtick delimiters on either side', (): void => {
+    for (const source of ['`literal', 'literal`', 'text `literal', 'literal` text']) {
+      expect(codeSurfaceDiagnostics('fixture.md', source)).toContainEqual({
+        path: 'fixture.md',
+        line: 1,
+        code: 'inline-delimiter',
+      });
+    }
+  });
+
+  it('counts every invalid column-one fence candidate before later profile selection', (): void => {
+    for (const firstCandidate of [
+      '````fleet-synopsis',
+      '```fleet-synopsis```',
+      '~~~fleet-synopsis~~~',
+    ]) {
+      expect(
+        codeSurfaceDiagnostics(
+          'reference/cli.md',
+          `${firstCandidate}\n\`\`\`unknown\n\`\`\`fleet-synopsis\nmosaic fleet verify\n\`\`\``,
+        ),
+      ).toEqual([
+        { path: 'reference/cli.md', line: 1, block: 1, code: 'fence-marker' },
+        { path: 'reference/cli.md', line: 2, block: 2, code: 'fence-info' },
+        { path: 'reference/cli.md', line: 3, block: 3, code: 'profile-unknown' },
+        { path: 'reference/cli.md', line: 5, block: 4, code: 'fence-info' },
+      ]);
+    }
+  });
+
   it('rejects inline delimiter runs instead of silently omitting them', (): void => {
-    for (const source of ['``literal``', '```literal```', 'text ``literal`` text']) {
+    for (const source of ['``literal``', 'text ```literal```', 'text ``literal`` text']) {
       expect(codeSurfaceDiagnostics('fixture.md', source)).toContainEqual({
         path: 'fixture.md',
         line: 1,