# MARB

> Public Mechanical Assembly Reasoning Benchmark materials published by Sunnyday Technologies and CADCLAW.

## Canonical pages

- Benchmark home: https://marb.cadclaw.io/
- First-results snapshot: https://marb.cadclaw.io/first-results/
- Studies log: https://marb.cadclaw.io/studies/
- MARB-A Pascal pilot: https://marb.cadclaw.io/pascal/
- MARB v0.9 recap: https://marb.cadclaw.io/recap/
- CADCLAW engine: https://cadclaw.io/

## Machine-readable resources

- This summary: https://marb.cadclaw.io/llms.txt
- Sitemap: https://marb.cadclaw.io/sitemap.xml
- Crawler and AI-use policy: https://marb.cadclaw.io/robots.txt
- Experimental static discovery record: https://marb.cadclaw.io/.well-known/mcp-manifest.json
- Security contact: https://marb.cadclaw.io/.well-known/security.txt

## Current public record

- Mechanical-track scoring version: v0.9.
- The repository run registry contains 43 records at this source revision. Site boards are dated editorial snapshots and can summarize fewer cells.
- MARB reports declared artifact metrics and gates under the task, scorer, software versions, and conditions stated for each record.
- Public code, methods, kits, grades, and result records remain governed by their repository file licenses. Answer keys and leak-detection rules remain separately gated to protect benchmark integrity.

## Evidence and reliance boundary

- Results are publisher-run measurements, not independent certification, physical testing, manufacturing approval, safety review, code-compliance determination, professional engineering opinion, or a claim about a product's overall performance.
- Cross-cell interpretation must retain tool, prompt, hint, assistance, attempt, seed, host-meter, software-version, and missing-data differences. A dated result does not establish causation, general model superiority, or future price/performance.
- Automated and simulation checks can miss real-world material, tolerance, assembly, and use-condition failures. Manufacturing and safety decisions require qualified review and appropriate physical validation.

## Commercial boundary

- This public site exposes no paid API, hosted MCP tools, payment endpoint, transaction authority, or purchasing agent.
- Sunnyday may manually scope a sponsored benchmark run or private evaluation after an inquiry. Planning ranges are non-binding; no order exists until entity, scope, independence, deliverables, taxes, data and artifact rights, privacy, cancellation/refund, and payment terms are confirmed in a signed order or invoice.
- Sponsorship does not buy or guarantee a score, rank, favorable conclusion, publication outcome, endorsement, certification, or product-performance claim.

## Content use

- Search indexing and real-time AI input are allowed. Model training is not permitted by this site's Content Signal: search=yes, ai-input=yes, ai-train=no.
- Content Signal communicates the publisher's machine-readable preference; applicable contracts, licenses, law, and third-party rights still govern use.
- Updated: 2026-08-11.