merge: resolve version/changelog/build conflicts with main (v0.12.7.0)

Main shipped v0.12.7.0 (community PRs + security hardening) while this
branch had v0.13.0.0 (design tools). Resolution:
- VERSION: keep 0.13.0.0 (this branch is newer, includes main's changes)
- package.json: take our build script (design binary compilation) with
  main's semicolon separator fix (gen:skill-docs resilience)
- CHANGELOG: keep both entries, 0.13.0.0 on top, 0.12.7.0 below
- Regenerated stale codex skills (ship, document-release) for main's
  co-author trailer changes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/discover-skills.ts

@@ -10,7 +10,7 @@ const SKIP = new Set(['node_modules', '.git', 'dist']);
 
 function subdirs(root: string): string[] {
   return fs.readdirSync(root, { withFileTypes: true })
-    .filter(d => d.isDirectory() && !SKIP.has(d.name))
+    .filter(d => d.isDirectory() && !d.name.startsWith('.') && !SKIP.has(d.name))
     .map(d => d.name);
 }
 

scripts/resolvers/index.ts

@@ -12,7 +12,7 @@ import { generateCommandReference, generateSnapshotFlags, generateBrowseSetup }
 import { generateDesignMethodology, generateDesignHardRules, generateDesignOutsideVoices, generateDesignReviewLite, generateDesignSketch, generateDesignSetup, generateDesignMockup } from './design';
 import { generateTestBootstrap, generateTestCoverageAuditPlan, generateTestCoverageAuditShip, generateTestCoverageAuditReview } from './testing';
 import { generateReviewDashboard, generatePlanFileReviewReport, generateSpecReviewLoop, generateBenefitsFrom, generateCodexSecondOpinion, generateAdversarialStep, generateCodexPlanReview, generatePlanCompletionAuditShip, generatePlanCompletionAuditReview, generatePlanVerificationExec } from './review';
-import { generateSlugEval, generateSlugSetup, generateBaseBranchDetect, generateDeployBootstrap, generateQAMethodology } from './utility';
+import { generateSlugEval, generateSlugSetup, generateBaseBranchDetect, generateDeployBootstrap, generateQAMethodology, generateCoAuthorTrailer } from './utility';
 
 export const RESOLVERS: Record<string, (ctx: TemplateContext) => string> = {
   SLUG_EVAL: generateSlugEval,
@@ -46,4 +46,5 @@ export const RESOLVERS: Record<string, (ctx: TemplateContext) => string> = {
   PLAN_COMPLETION_AUDIT_SHIP: generatePlanCompletionAuditShip,
   PLAN_COMPLETION_AUDIT_REVIEW: generatePlanCompletionAuditReview,
   PLAN_VERIFICATION_EXEC: generatePlanVerificationExec,
+  CO_AUTHOR_TRAILER: generateCoAuthorTrailer,
 };

scripts/resolvers/utility.ts

@@ -365,3 +365,10 @@ Minimum 0 per category.
 11. **Show screenshots to the user.** After every \`$B screenshot\`, \`$B snapshot -a -o\`, or \`$B responsive\` command, use the Read tool on the output file(s) so the user can see them inline. For \`responsive\` (3 files), Read all three. This is critical — without it, screenshots are invisible to the user.
 12. **Never refuse to use the browser.** When the user invokes /qa or /qa-only, they are requesting browser-based testing. Never suggest evals, unit tests, or other alternatives as a substitute. Even if the diff appears to have no UI changes, backend changes affect app behavior — always open the browser and test.`;
 }
+
+export function generateCoAuthorTrailer(ctx: TemplateContext): string {
+  if (ctx.host === 'codex') {
+    return 'Co-Authored-By: OpenAI Codex <noreply@openai.com>';
+  }
+  return 'Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>';
+}