Terms of use

Last updated: 2026-09-30

These Terms of use ("Terms") are an agreement between you and Haytham M. Hisham, Egypt ("we", "us"), publisher of HarnessTron. They govern your use of the HarnessTron desktop app in its Free and Pro editions, the license service and update feeds, and this website (together, the "Service"). By installing or using the app you agree to them. If you do not agree, do not install or use the app.

If you installed the app from the Microsoft Store, Microsoft's standard application license terms apply in addition to these Terms. If there is a conflict, Microsoft's terms govern the Store download itself; these Terms govern your Pro license, the app's behavior, and liability. Payments are handled by Lemon Squeezy as merchant of record — its buyer terms apply to the purchase. Our Privacy policy explains what data we handle; our Refund policy is part of these Terms.

Please read sections 5, 13, 14 and 15 carefully. They say AI agents act on your computer at your sole risk, the app is provided "as is", our liability is capped, and you indemnify us for claims arising from your use.

1. Eligibility and authority

• You must be at least 18 years old, or the age of majority in your country, whichever is higher. The app is a developer tool and is not aimed at children.
• If you accept these Terms on behalf of a company or organization, you represent you have authority to bind it.
• You represent your use complies with the laws of your country, including export and trade-control laws. The app may not be used in or for the benefit of embargoed territories or prohibited persons.

2. What HarnessTron is

HarnessTron coordinates AI coding agents on your own computer. You draw loops on a canvas, connect agents (a planner, a coder, a reviewer), and they pass work to each other in chat threads. HarnessTron starts command-line AI tools you installed yourself — such as Claude Code and Codex — as child processes, reads and writes the project folders you point it at, and runs a local server that listens only on your own computer (127.0.0.1). HarnessTron includes no AI model of its own.

• Free may be used at no charge, with the limits shown in the app (two agents in a loop, on Claude Code and Codex, no escalation edges).
• Pro is unlocked with a license key you buy on this site. It removes those limits and adds the Pro features listed in the app (escalations, scheduled loops, repo graph and research tools, Git and Timeline, Skills library, Moodboard).
• You keep all rights to your own code, prompts and agent output. We keep all rights to the app itself. There are no implied licenses.

3. License grant and restrictions

Subject to your compliance with these Terms, we grant you a personal, non-exclusive, non-transferable, revocable license to install and use the app on computers you own or control, for personal and commercial work.

• Except to the extent a restriction is impermissible under your applicable law, you may not: reverse-engineer, decompile or attempt to extract the source of the app; reproduce, modify or create derivatives of the app; rent, lease, lend, sell or redistribute the app; remove proprietary notices; probe or penetrate the license service; or knowingly permit anyone else to do so.
• One key is for one person. Do not share, publish, resell, lease, lend or transfer your key. A key may be active on up to 2 computers at a time. Use "Release this machine" in Settings → License to move an activation.
• Do not bypass, disable, probe or interfere with the license check, the update-year check, the offline token, or the Free / Pro gates. Do not forge, edit, replay or strip license tokens, spoof the license service, or reuse another computer's activation.
• We may warn, suspend or permanently deactivate a key that is shared, resold, forged, used beyond its limit, charged back, or used to abuse the service. A refunded, charged-back or deactivated key stops unlocking Pro at the next online check.

4. Your Pro license and updates

• Your purchase includes one year of updates from the purchase date. Any app version released within that year keeps working with your key for as long as you keep it (the app re-checks once a day while online; it tolerates up to 30 days offline). A version released after your year ends starts as Free until you renew. We have not announced renewal terms and do not promise a renewal price.
• If you installed from the Microsoft Store, the Store delivers updates on its own schedule. A Store update released after your year ends also starts as Free.
• Refunds are described on the refund page. A refunded key stops unlocking Pro at the next check; the app keeps working as Free and your local data is untouched.

5. AI agents act on your computer — you assume the risk

This is the core risk of this product. Read it twice.

• Agents change your computer. Loops let AI agents read, create, change and delete files and run shell commands in the folders you point them at — automatically, without asking you each time. Agents can delete or overwrite the wrong files, corrupt a repository, run destructive commands, install or modify software, expose secrets, or push bad code to a remote.
• AI output is unreliable. Like Cursor, Claude and ChatGPT, our agents are driven by third-party large language models. Their output may be wrong, incomplete, insecure, infringing, or offensive, and does not represent our views. Similar or identical output may be given to other users; no rights in other users' output are granted to you.
• Your duties. You — not us — are responsible for: pointing agents only at folders you can afford to change; keeping version control and backups before every run; reviewing every diff and command before you rely on, commit, deploy or ship it; using test environments and safeguards (separate folders, branches, least-privilege accounts) for anything destructive or irreversible; and ensuring you have the rights to every file, secret and system the agents touch.
• Automatic execution. Where the app executes agent-suggested code or commands without manual confirmation, you assume all risks of that execution, including system outages, software defects, data loss, and security vulnerabilities — the same rule Cursor states in its section 1.7. Do not enable unattended or scheduled loops over data you have not backed up.
• No reliance. Any use of agent output is at your sole risk. You will not rely on it as a sole source of truth, and you will apply human review before using or sharing it, including before making legal, medical, financial, hiring, credit, or other material decisions.

6. Third-party tools and services

• HarnessTron requires command-line AI tools you install and sign in to yourself (Claude Code, Codex, and optionally others), under your own accounts and at your own cost. Those companies' terms and privacy policies apply to that use. We are not a party to those contracts and are not responsible for their models, outages, billing, or data handling.
• An optional OpenRouter key you enter sends recall/search text (and code text if you enable embeddings) directly from your computer to OpenRouter under your account. The Antigravity usage meter reads your locally stored Google token and asks Google for quota only. We never see either.
• The app may include or link to third-party software. Third-party terms govern those parts and we make no warranties about them.

7. Payments

Lemon Squeezy is the seller of record: it takes payment, handles sales tax and VAT, issues receipts, and its buyer terms apply. We never see your card number. Prices are shown at checkout in USD; you are responsible for any taxes, duties or bank charges beyond what Lemon Squeezy collects. All fees are non-refundable except as the refund page or applicable law requires.

8. Acceptable use

You may not use the app to break the law, to access computers or accounts you have no right to access, to deceive anyone, to infringe anyone's intellectual-property, privacy or other rights, to generate or spread malware, spam or unlawful content, to harvest data from the Service, to benchmark or extract our models or Service for a competing product, or to upload specially regulated data (health, payment-card, or similar data subject to special security regimes) to us. Tell us promptly about any unauthorized use of your key and cooperate to stop it.

9. Security

• The app talks to our license and update service over HTTPS only. License tokens are signed and verified against a built-in public key; edited tokens are rejected. API keys you enter are kept in your operating system's credential store.
• Found a vulnerability? Email support@harnesstron.dev with steps to reproduce and give us reasonable time to fix it before disclosing it. We have no paid bug-bounty program.
• No software is invulnerable. Keep your OS, tools and the app updated.

10. Changes to the app and these Terms

We may modify or discontinue all or part of the Service at any time, temporarily or permanently. We may update these Terms by posting a new version with a new date; continued use after posting is acceptance. If you disagree, stop using the app. Retain copies of your loops, chats and content — we may delete account-associated data after termination.

11. Termination

You may stop using the app at any time. We may suspend or terminate your access for breach, abuse, non-payment of any amount due, or legal, security or operational reasons, with or without advance notice where urgent. On termination your license rights end and you must stop using Pro; Free may still be used within its limits. The sections that must survive (content rights, payments due, disclaimers, liability limits, indemnity, law) survive.

12. Feedback

If you send us ideas or suggestions about the app, we may use them without restriction or compensation.

13. Disclaimers — no warranties

THE SERVICE, INCLUDING AGENT OUTPUT, IS PROVIDED "AS IS" AND "AS AVAILABLE". TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, QUIET ENJOYMENT, NON-INFRINGEMENT, ACCURACY, AVAILABILITY, RELIABILITY, SECURITY AND PRIVACY, AND ANY WARRANTY ARISING FROM COURSE OF DEALING OR TRADE USE. WE DO NOT WARRANT THE APP OR AGENT OUTPUT WILL BE UNINTERRUPTED, SECURE, ERROR-FREE, OR FREE OF VIRUSES OR HARMFUL COMPONENTS, OR THAT DEFECTS WILL BE CORRECTED. ANY USE OF AGENT OUTPUT IS AT YOUR SOLE RISK. Some jurisdictions do not allow these disclaimers, so some may not apply to you.

14. Limitation of liability

• No indirect damages. To the fullest extent permitted by law, we are not liable for indirect, incidental, special, consequential or punitive damages — including loss of profits, data, goodwill, code, or work — arising from these Terms, the app, or agent output, whether in contract, tort (including negligence), statute or otherwise, even if advised of the possibility.
• Cap. To the fullest extent permitted by law, our total aggregate liability for all claims arising from these Terms, the app, or agent output is limited to the greater of (a) what you paid us for the Service in the 12 months before the claim arose, or (b) USD 100. This cap is essential to these Terms — we could not offer the app without it. It applies even if a limited remedy fails its essential purpose.
• Nothing here limits liability that cannot legally be limited, or rights your consumer law gives you that cannot be waived.

15. Indemnity — you defend us

To the fullest extent permitted by law, you will defend, indemnify and hold harmless Haytham M. Hisham and our affiliates, officers, employees, contractors and agents from all liabilities, claims, damages, expenses (including reasonable attorneys' fees) and losses arising from: (a) your use or misuse of the app, including anything agents do on your computers or accounts at your direction; (b) your content, inputs, code and agent output; (c) your breach of these Terms or violation of law; and (d) any claim that your content or use violates a third party's intellectual-property, privacy, confidentiality or other rights. We may assume exclusive defense at our expense, and you will cooperate.

16. Law, disputes and contact

These Terms, and any dispute arising from them, the app, or agent output — whether in contract, tort, statute or otherwise — follow the laws of Egypt, except where your local consumer law mandatorily says otherwise. Before filing any claim, you agree to email support@harnesstron.dev with the facts and give us 30 days to resolve the matter informally. Neither party is required to arbitrate; either may bring an individual claim in a competent court, subject to section 14.

Contact for everything under these Terms — support, licensing, security reports, AI-output reports, privacy requests, and copyright complaints: Haytham M. Hisham, Egypt, support@harnesstron.dev. There is no separate support organization; email is the channel and is also shown in the app under Settings.

17. Copyright complaints and repeat infringers

If you believe content in or produced with the app infringes your copyright, send a written notice to support@harnesstron.dev with all of the following:

1. Your physical or electronic signature, as the owner or as someone authorized to act for the owner.
2. Identification of the copyrighted work you claim is infringed (title, and a copy or link where possible).
3. Identification of the allegedly infringing material and where it is located, with enough detail for us to find it.
4. Your name, address, telephone number and email address.
5. A statement that you have a good-faith belief the disputed use is not authorized by the owner, its agent, or the law.
6. A statement that the information in your notice is accurate and, under penalty of perjury, that you are the owner or authorized to act for the owner.

We may remove or disable material we believe infringes or violates these Terms, and we terminate the keys or access of repeat infringers where appropriate. If you believe your key or material was removed in error, reply to our notice with the same six items plus an explanation, and we will review it. Nothing here is legal advice about your rights.

18. Electronic communications

By using the Service you consent to receiving transactional and administrative communications electronically at your purchase or support email address: receipts and license keys (via Lemon Squeezy), activation and renewal notices, support replies, security and breach notices, and legal notices under these Terms. These electronic messages satisfy any legal requirement that communications be in writing. We send no marketing email. Notices we send are deemed given when sent; notices you send are deemed given when we receive them at support@harnesstron.dev.

19. General

• Entire agreement. These Terms, together with the Privacy policy, the Refund policy, Lemon Squeezy's buyer terms for the purchase itself, and Microsoft's Store terms for the Store download where applicable, are the entire agreement between you and us about the Service.
• Assignment. You may not assign or transfer these Terms or your key, in whole or in part, by operation of law or otherwise, without our prior written consent. We may assign these Terms and all rights under them — including license records — at any time without notice or consent, for example in a sale of the business, provided the assignee honors these Terms for existing keys.
• Severability. If any provision is held invalid or unenforceable, it is given effect to the greatest extent possible and the remaining provisions stay in full force.
• No waiver. Our failure to enforce a provision now does not waive our right to enforce it later; a waiver of one breach is not a waiver of later breaches.
• Survival. Sections 3 (restrictions), 4 (amounts due), 7 (payments), 12 (feedback), 13 (disclaimers), 14 (liability limits), 15 (indemnity), and 16–19 survive expiry or termination.
• Language. These Terms are written in English, which controls over any translation.