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Docsy moves to the Linux Foundation with experimental output built for AI agents
Google's Docsy theme, on about 2,200 projects by the end of 2024, is moving to the Linux Foundation while it adds output built for AI agents. Teams on the theme now decide, site by site, whether their docs also get published for machine readers.
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What happened
- Erin McKean, a Google developer relations engineer on Docsy's steering committee, announced the move in a keynote at Open Source Summit Europe in Prague.
- Docsy 0.15.0, released in May, can emit a Markdown copy of each page alongside the HTML plus an llms.txt index of the site, both opt-in and experimental.
- In 0.17.0, released in August, sites that enable llms.txt automatically get a hidden directive at the top of each page pointing visiting agents to the index.
- Next on the roadmap are agent-friendly documentation scores meant to rate how easily AI tools can find, navigate and consume a site's docs.
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Why it matters
- decision Sites that enabled llms.txt before August pick up the hidden directive automatically on moving to 0.17.0, so that version bump changes every page and needs its own review.
- constraint Anything a team builds on the Markdown copies or the llms.txt index depends on output its maintainers still label experimental, on a theme versioned 0.17.
- precedent If the agent-friendly scores ship, projects get a number to tune docs against, and it transfers only as far as the scored tools behave like the assistants their users run.
Docsy is a theme for the Hugo static site generator [3]. Each agent feature is extra output from the site build, and each one stays off until the site owner enables it [5]. Of these, the llms.txt index decides where an agent goes. "You can redirect your LLMs and agents to the text that tells them how to use the project," McKean said [6].
Since 0.17.0, a hidden directive at the top of every page points agents to that index [8]. Because it is hidden, clicking through the rendered site in a browser will not show it. It is in the generated HTML, where a diff between a 0.16.0 build and a 0.17.0 build will find it.
The features came out over three minor releases between May and August [15]. The one I would copy outside Docsy is the 0.16.0 upgrade guide. It was written so an AI assistant could follow it, with conditions, steps and checks built into the instructions [7]. I think a stated precondition and a check after each step help the person upgrading as much as the assistant. McKean made the same argument about audience. "When we're making technical documentation, it really doesn't matter how the information becomes useful to humans, as long as it does it," she said [12]. "If someone told me that there was evidence that said opera is the best way to reach your project users, I'd be writing operas." [12]
The New Stack's report does not include figures on how often agents fetch llms.txt or follow the page directive. The agent-friendly scores on the roadmap are the maintainers' answer to that gap [9]. "You won't have to guess," McKean said. "You can measure how agent friendly your docs are." [10]
The foundation move follows the existing user base. McKean's case is that Docsy is already used widely inside Linux Foundation communities [14]. Kubernetes, OpenTelemetry, gRPC and Jaeger are among the CNCF projects using it [4]. "Open source projects work best when they are close to the users," she said [11]. She also made the maintainer case: "When you have good docs, it reduces the number of questions that can be easily answered by documentation, reducing the burden on maintainers." [13]
For a project whose users lean on coding assistants, I would turn on the Markdown copy and llms.txt on a branch. Then I would edit the index by hand so it points at the pages that explain usage [5][6]. I would move to 0.17.0 only after someone has read the directive in the page source [8]. For a site with little agent traffic, the experimental label on the Markdown output, llms.txt and the directive is enough reason to wait [5][8].
What to watch
- Whether the agent-friendly documentation scores ship, and which AI tools they score against.
- Whether the Markdown output, llms.txt and the page directive drop the experimental label in a release after 0.17.0.
- The governance terms of the Linux Foundation transfer, including the role of Docsy's steering committee.