touchstone-platform

# Touchstone License (formerly Model Gym License)

**Version 2.0** — effective 2026-05-18.
Supersedes the Model Gym Educational Use License v1 (2026).
Platform renamed from Model Gym to Touchstone (Crucible benchmark engine) in v1.0.0.

Copyright © 2026 Yadavilli Solutions. All Rights Reserved.

> **Plain-English summary** (not part of the legal terms):
> You can read, study, learn from, and run this code for evaluation
> and non-commercial purposes for free. Production use, customer
> delivery, hosting it for someone else, or making money with it
> requires a separate commercial license — see [`COMMERCIAL.md`](COMMERCIAL.md).

---

## 1. Definitions

In this License:

- **"Software"** means the contents of this repository, including source
  code, scripts, configuration files, documentation, schemas, prompts,
  example data, generated artifacts, and any updates or derivative
  versions distributed by Yadavilli Solutions.
- **"Licensor"** means Yadavilli Solutions, the sole copyright holder.
- **"You"** means the individual or legal entity exercising rights
  under this License.
- **"Permitted Use"** means use under Section 2 only.
- **"Commercial Use"** means any use described in Section 3.
- **"Derivative Work"** means any work that incorporates, modifies,
  translates, or is based on the Software, in whole or in part.
- **"Production"** means any use that processes real data, real
  customer requests, real model evaluations for record, or any other
  use whose output is relied upon outside a learning or evaluation
  context.

## 2. Grant — Permitted Use (no fee)

Subject to your compliance with this License, the Licensor grants You
a worldwide, royalty-free, non-exclusive, non-transferable license to
use, copy, modify, and create Derivative Works of the Software, solely
for the following purposes:

1. **Personal learning, study, and research.**
2. **Teaching, classroom, workshop, conference talk, or demonstration**
   provided the demonstration is not part of a paid engagement.
3. **Non-commercial evaluation** to assess whether the Software fits
   Your needs prior to entering a commercial license.
4. **Academic publication** that cites the Software and Licensor.
5. **Personal or research forks** that preserve this LICENSE file,
   the copyright notice, and any attribution notices.

Permitted Use does **not** include Production, redistribution to third
parties, or any Commercial Use.

## 3. Commercial Use — separate license required

A separate paid Commercial License Agreement from the Licensor is
required before You may use the Software, any Derivative Work, or any
substantial portion thereof for any of the following:

1. **Production use** by a for-profit entity, government agency, or
   any organization with paying customers, members, or beneficiaries.
2. **Hosted services or SaaS offerings** that expose the Software's
   functionality (in whole or part) to third parties, whether or not
   payment is involved.
3. **Customer delivery, consulting, integration, or implementation
   work** that uses the Software or any Derivative Work to fulfill
   a paid engagement.
4. **Internal production use** by any entity with annual gross revenue
   exceeding USD 5,000,000, regardless of whether the Software's
   functionality is exposed externally.
5. **Bundling, sub-licensing, white-labeling, or OEM distribution** of
   the Software or any Derivative Work.
6. **AI-evaluation-as-a-service, benchmarking-as-a-service,
   certification-as-a-service, or compliance-as-a-service offerings**
   that derive material value from the Software's leaderboards,
   metrics, scenarios, scoring, or evidence-bundle output.
7. **Training, fine-tuning, or evaluation of models intended for
   commercial deployment** where the Software's metrics, scenarios, or
   leaderboards inform the model's release decision.

To obtain a Commercial License, contact: **see [`COMMERCIAL.md`](COMMERCIAL.md)**.

The Licensor reserves the right to negotiate commercial terms on a
per-engagement basis, including tiered pricing, support obligations,
field-of-use restrictions, and exclusivity. No commercial right is
granted by silence, by use, or by any prior course of dealing — only
by a fully executed Commercial License Agreement.

## 4. Restrictions

Under both Permitted Use and Commercial Use, You may **not**:

1. Remove or alter any copyright, license, trademark, attribution, or
   author notice in the Software or any Derivative Work.
2. Use the names "Model Gym", "Yadavilli Solutions", or any related
   trademark, logo, or trade dress, except as required to identify
   the origin of the Software or to comply with Section 5.
3. Misrepresent the origin of the Software or any Derivative Work.
4. Distribute the Software or a Derivative Work under any license that
   purports to grant rights broader than those granted here, including
   any OSI-approved open-source license.
5. Reverse engineer, decompile, or disassemble any binary distribution
   of the Software except to the extent expressly required by
   applicable law.
6. Use the Software to develop a competing AI-evaluation, agent-
   benchmarking, or certification product or service offered to third
   parties, whether free or paid, without a prior written Commercial
   License Agreement that expressly permits such use.
7. Use the Software in violation of any applicable export-control,
   sanctions, or anti-bribery law.
8. Represent any output of the Software (including evaluation scores,
   certifications, evidence bundles, or leaderboard rankings) as
   independently audited, third-party verified, or regulator-approved
   unless You have a separate written attestation from the Licensor.

## 5. Attribution

Any Permitted Use that publishes, demonstrates, or distributes the
Software or a Derivative Work must:

1. Preserve this `LICENSE.md` file verbatim.
2. Preserve the copyright notice in each file that contains one.
3. Include a clearly visible attribution: "Built on Model Gym
   (https://github.com/yadavilli-solutions/benchmark) © Yadavilli
   Solutions, licensed under the Model Gym License v2."

## 6. Trademarks

"Model Gym", "Yadavilli Solutions", and any associated logos are
trademarks of the Licensor. This License does not grant any rights to
use those trademarks except for the limited, descriptive, attribution
purpose required by Section 5. All other use requires prior written
permission.

## 7. Patent Grant + Termination

The Licensor grants You a non-exclusive, royalty-free patent license
to make, use, sell, offer for sale, or import the Software solely as
necessary to exercise the rights granted in Section 2 (Permitted Use)
or under a separate Commercial License.

If You initiate or knowingly participate in any patent litigation
(including a cross-claim or counterclaim) alleging that the Software,
or any contribution incorporated into the Software, constitutes direct
or contributory patent infringement, all rights granted to You under
this License terminate as of the date such litigation is filed.

## 8. Term and Termination

This License is effective until terminated.

The Licensor may terminate this License immediately upon written
notice if You breach any term. Upon termination:

1. All rights granted to You under this License cease.
2. You must promptly cease all use, destroy all copies of the
   Software in Your possession or control, and certify such
   destruction to the Licensor on request.
3. Sections 4 (Restrictions), 6 (Trademarks), 9 (No Warranty), 10
   (Limitation of Liability), 11 (Governing Law), and 12 (Severability)
   survive termination.

A Commercial License Agreement may override the termination terms of
this License with respect to its own subject matter.

## 9. No Warranty

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
NON-INFRINGEMENT.

The Software outputs evaluation scores, compliance citations, safety
ratings, and certification artifacts that **may not be relied upon for
regulatory, legal, audit, clinical, or safety decisions** without
independent verification.

The Licensor makes no representation or warranty that the Software is
free of defects, error-free, secure, fit for any particular purpose,
or compliant with any specific regulation in any specific jurisdiction.

## 10. Limitation of Liability

IN NO EVENT SHALL THE LICENSOR, ITS AFFILIATES, OR ANY CONTRIBUTOR BE
LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT (INCLUDING NEGLIGENCE), OR OTHERWISE, ARISING
FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

WITHOUT LIMITING THE FOREGOING, THE LICENSOR'S AGGREGATE LIABILITY TO
YOU UNDER OR IN CONNECTION WITH THIS LICENSE (REGARDLESS OF CAUSE)
SHALL NOT EXCEED THE GREATER OF (a) USD 100, OR (b) THE FEES PAID BY
YOU TO THE LICENSOR UNDER ANY COMMERCIAL LICENSE IN THE TWELVE (12)
MONTHS PRECEDING THE CLAIM.

## 11. Governing Law and Disputes

This License is governed by the laws of the **[JURISDICTION TO BE SET
BY LICENSOR]**, excluding its conflict-of-laws principles. The parties
consent to the exclusive jurisdiction of the courts located in that
jurisdiction for any dispute arising out of or relating to this
License.

The UN Convention on Contracts for the International Sale of Goods
does not apply.

## 12. Severability

If any provision of this License is held to be unenforceable, the
remaining provisions remain in full force and effect, and the
unenforceable provision shall be interpreted to give effect to its
intent to the maximum extent permitted by law.

## 13. Entire Agreement

This License constitutes the entire agreement between You and the
Licensor with respect to the Software, except to the extent superseded
by a Commercial License Agreement that expressly references and
modifies this License. No oral statement, prior writing, or course of
dealing shall modify the terms of this License.

---

## Owner notes (delete before publishing the license externally)

This document is a starting template, not legal advice. Before relying
on it for actual customer agreements, have counsel:

- Fill in the **JURISDICTION** placeholder in Section 11.
- Confirm the Section 3.4 revenue threshold (USD 5M) matches your
  pricing strategy.
- Review Section 4.6 (no-compete clause) against the laws of any
  jurisdiction where contributors live — some restrict no-compete
  enforceability.
- Decide whether to add an explicit network-use clause (à la AGPL §13)
  if You want to require Commercial Licenses for SaaS use even without
  redistribution.
- Confirm Section 10's liability cap is acceptable to Your insurer.
- Cross-check the trademark assertions in Section 6 with any actual
  trademark filings.