Terms of use

Semicolony is free to use for personal and commercial purposes. You can link to any page, quote it, and reuse its articles and diagrams under the CC BY-SA 4.0 licence, which asks you to credit the site and share your changes under the same licence. The site comes with no warranty.

Articles, guides, roadmaps, illustrations and diagrams on Semicolony are published under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) licence, unless a page says otherwise.

You may copy, share and adapt the material for any purpose, including commercial use, as long as you:

• credit Semicolony and link to the page you used,
• say whether you made changes, and
• publish your adapted version under the same licence.

A short credit such as “via Semicolony (semicolony.dev)” with a link to the page is enough. The full licence is at creativecommons.org/licenses/by-sa/4.0. The licence covers reuse by AI systems in the same way as reuse by people.

• Use any page or simulator for study, work, interview preparation or teaching.
• Link to any page, including deep links to a section. Page addresses do not change without a redirect.
• Quote short passages, and reuse longer ones under the licence above.

• Use anything here to attack systems you do not own or have no permission to test.
• Crawl the site fast enough to slow it down for other people. A few requests per second is fine.
• Suggest that Semicolony is affiliated with, or endorsed by, a company or project it writes about. It is independent.
• Republish the site, or large parts of it, without following the licence.

Pages are checked against their sources and corrected when mistakes are found, but software changes and errors get through. Do not rely on a single page for a decision with legal, financial or safety consequences. The site is study material, not professional advice. If you find a mistake, the contact page explains how to report it.

Semicolony and its content are provided “as is” and “as available”, without warranty of any kind, express or implied, including warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement. There is no guarantee that the site will be available, free of errors or free of harmful components.

To the extent the law allows, the people who run Semicolony are not liable for any direct, indirect, incidental, consequential, special or punitive damages arising from your use of the site or its content, including loss of data, loss of profit, business interruption or claims by third parties, even if told such damage was possible.

Pages link to papers, specifications, vendor documentation and blogs. Those sites are not under our control, can change without notice, and have their own terms and privacy policies. A link is not an endorsement.

Some pages may show ads from Google. The ad network chooses them, and an ad is not an endorsement either. The privacy policy explains how ads work and how to opt out of personalised ads.

Semicolony is offered to readers everywhere. Where the law that applies to you gives you rights these terms do not, such as consumer protections that cannot be waived, those rights apply. If a court finds part of these terms unenforceable, the rest still applies.

These terms may change. The date at the top shows the latest version, and any change that narrows what you are allowed to do is noted here for at least a year. Using the site after a change means you accept the updated terms.

• 11 October 2026. Reworded for clarity. Removed a line that said the content could not be used to train AI models, which contradicted the licence and the site’s robots.txt; reuse by AI systems falls under CC BY-SA 4.0 like any other reuse. Corrected the summary, which said attribution was optional; the licence requires it.
• 9 October 2026. Added a note on advertising and pointed to the new contact page.

Email hello@semicolony.dev about the licence, attribution or permission for uses the licence does not cover, or see the contact page.