Add collaborative LaTeX macro safety guard

Author: Test User

README.md

@@ -1,2 +1,4 @@
 # deepevents.ai
 deepevents.ai main codebase
+
+- [Collaborative LaTeX macro safety guard](collaborative-latex-macro-safety-guard/README.md)

collaborative-latex-macro-safety-guard/README.md

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+# Collaborative LaTeX Macro Safety Guard
+
+This module is a self-contained real-time collaborative research editor slice for SCIBASE.AI issue #12. It validates synchronized Markdown and LaTeX editor packets before live preview or named-version export.
+
+The guard uses synthetic data only. It does not connect to live users, private manuscripts, browser sessions, credentials, or external services.
+
+## Scope
+
+- Detect conflicting collaborator macro definitions before broadcast.
+- Block unsafe macro commands such as raw HTML helpers, external links, and image includes unless a trusted render packet is explicitly reviewed.
+- Detect recursive macro expansion cycles that can hang live preview or export rendering.
+- Block raw active HTML and unapproved external render resources inside Markdown/LaTeX blocks.
+- Hold locked sections when unapproved or external-resource macro changes affect the render packet.
+- Emit deterministic remediation actions for live preview, trusted KaTeX rendering, and named-version export gates.
+
+## Requirement Mapping
+
+| Issue #12 area | Implementation |
+| --- | --- |
+| Rich scientific formatting | Macro, equation, Markdown, and external render-resource checks |
+| Real-time collaboration | Multi-user macro conflict and shared render packet validation |
+| Locking/unlock modes | Locked section render holds for risky macro packets |
+| Version history and autosave | Named-version export decisions and reviewer remediation packets |
+
+## Files
+
+- `index.js` - dependency-free evaluator plus Markdown/SVG report renderers.
+- `sample-data.js` - synthetic ready, blocked, and needs-review editor packets.
+- `test.js` - Node assertion coverage for guard decisions and report renderers.
+- `demo.js` - writes deterministic JSON, Markdown, and SVG reviewer artifacts.
+- `scripts/render-demo-video.js` - optional ffmpeg-based MP4 renderer.
+- `reports/` - generated reviewer artifacts.
+
+## Validation
+
+```bash
+npm run check
+npm test
+npm run demo
+```
+
+Optional video render when ffmpeg is available:
+
+```bash
+npm run demo:video
+```
+
+The included demo artifacts are deterministic and based only on the synthetic fixtures in `sample-data.js`.

collaborative-latex-macro-safety-guard/demo.js

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+const fs = require("node:fs");
+const path = require("node:path");
+const {
+  createGuardReport,
+  renderMarkdown,
+  renderSvg,
+} = require("./index");
+const { samplePackets } = require("./sample-data");
+
+const reportsDir = path.join(__dirname, "reports");
+fs.mkdirSync(reportsDir, { recursive: true });
+
+const report = createGuardReport(samplePackets);
+const jsonPath = path.join(reportsDir, "demo.json");
+const markdownPath = path.join(reportsDir, "demo.md");
+const svgPath = path.join(reportsDir, "demo.svg");
+
+fs.writeFileSync(jsonPath, `${JSON.stringify(report, null, 2)}\n`);
+fs.writeFileSync(markdownPath, renderMarkdown(report));
+fs.writeFileSync(svgPath, renderSvg(report));
+
+console.log(`Wrote ${path.relative(process.cwd(), jsonPath)}`);
+console.log(`Wrote ${path.relative(process.cwd(), markdownPath)}`);
+console.log(`Wrote ${path.relative(process.cwd(), svgPath)}`);
+console.log(
+  `Ready=${report.totals.ready} NeedsReview=${report.totals.needsReview} Blocked=${report.totals.blocked}`,
+);