fix(acr): size-neutral copy for "CLAUDE.md not modular" GAP (M-BUG-14)

The t2_2 feature-gap check is a pure presence check (rules file OR @import
present) with no length gate, consistent with its t2_3/t2_4/t2_5 siblings.
But the humanized copy claimed the file is "one big block" and that splitting
makes it "easier on the loading time" — an unconditional size/load-cost
overclaim. For a ~625-token non-modular CLAUDE.md the load saving is trivial,
so the description lied. Found by dogfooding feature-gap against linkedin-posts.

Decided fix = copy-softening, NOT a length gate in t2_2 (that would make it the
only size-gated check among the presence-check siblings + risks byte-stability
if a short non-modular CLAUDE.md fixture exists in snapshots).

- humanizer-data.mjs: title "one big block" -> "all live in one file";
  description drops "long"/"loading time", keeps the honest structural
  "split into linked files with @import or .claude/rules/" framing.
  recommendation unchanged.
- RED-first unit test pins the size-neutral copy (no "big"/"long"/"loading
  time" in title/desc, structural split framing kept).

Frozen v5.0.0 snapshots untouched (RAW envelope bypasses humanizer); SC-5
default-output byte-stable (no non-modular GAP finding in those fixtures).
Suite 1355->1356/0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01683eAqVecv9VZfQzL8CQ9h

scanners/lib/humanizer-data.mjs

@@ -435,8 +435,8 @@ export const TRANSLATIONS = {
         recommendation: 'Consider moving team-wide settings to project scope and keeping personal ones at user or local scope.',
       },
       'CLAUDE.md not modular': {
-        title: 'Your instructions file is one big block',
-        description: 'Splitting long instructions into smaller linked files makes them easier to maintain and easier on the loading time.',
+        title: 'Your instructions all live in one file',
+        description: 'Splitting your instructions into smaller linked files with `@import` or `.claude/rules/` keeps each part focused and easier to maintain.',
         recommendation: 'Break out long sections into separate files and link them with `@import`.',
       },
       'No path-scoped rules': {

tests/lib/humanizer-data.test.mjs

@@ -162,6 +162,23 @@ test('CML, SET, HKV, RUL, MCP, IMP, GAP, TOK, PLH have non-empty static maps', (
   }
 });
 
+test('GAP "CLAUDE.md not modular" copy is size-neutral (M-BUG-14)', () => {
+  // The t2_2 check is a pure presence check (no length gate), so a small
+  // non-modular CLAUDE.md must not be told it is "big"/"long" or that it
+  // costs "loading time". Title + description must stay size/cost-neutral
+  // and keep only the honest structural "split into linked files" framing.
+  const t = TRANSLATIONS.GAP.static['CLAUDE.md not modular'];
+  assert.ok(t, 'GAP static map missing "CLAUDE.md not modular"');
+  const title = t.title.toLowerCase();
+  const desc = t.description.toLowerCase();
+  assert.ok(!/\bbig\b/.test(title), `title overclaims size: "${t.title}"`);
+  assert.ok(!/\blong\b/.test(title), `title overclaims size: "${t.title}"`);
+  assert.ok(!/\bbig\b/.test(desc), `description overclaims size: "${t.description}"`);
+  assert.ok(!/\blong\b/.test(desc), `description overclaims size: "${t.description}"`);
+  assert.ok(!/loading time/.test(desc), `description overclaims load cost: "${t.description}"`);
+  assert.ok(/split/.test(desc), `description should keep structural split framing: "${t.description}"`);
+});
+
 test('CNF, COL, PLH have at least one pattern entry (template-literal titles)', () => {
   // These scanners use template-literal titles for some findings.
   for (const prefix of ['CNF', 'COL', 'PLH']) {