Devin prepares Fern docs for human revision

Devin Logan, Fern's human technical writer, uses Fern Writer, a Slack-based agent built on Cognition's Devin. The similar names refer to different participants. Logan gives the agent engineering context and receives documentation changes as pull requests.

A PDF-export update shows the division of work. Fern Writer reads an internal discussion about filtering exports by product and version, then proposes an update to the existing documentation page. Logan pulls the branch because the new material belongs inside an existing customization step rather than as a separate step. Claude Code helps perform that local revision and create a changelog entry.

Human review catches important details. The first changelog draft covers the entire PDF-export feature rather than the new filtering capability. The wording also confuses a dropdown with a different product feature. Logan supplies corrections and keeps iterating.

The account includes a larger authentication-documentation restructure where an engineer corrects the conceptual categories before approval. Logan explicitly says every page is reviewed and often extensively edited. The useful outcome is a repository draft and mechanical file work prepared for expert revision, not documentation that writes or validates its own technical truth.

Prompt
Suggested prompt (written by Agents In Use, not the author's)

Source: buildwithfern.com · Devin Logan