Proposals & vendor “standards”
Letta Agent File (.af)
Vendor-authored 'open standard' file format serializing one stateful agent (prompts, memory blocks, history). Format convention, not a standard body.
Specification
★ 1,216 on GitHub · last commit Oct 13, 2026
What it is
Vendor-authored 'open standard' file format serializing one stateful agent (prompts, memory blocks, history). Format convention, not a standard body.
At a glance
- Business model
- Specification
- License
- Apache-2.0
GitHub activity
This product has a public repository, so we read it nightly from the GitHub API. Stars measure developer attention, not quality or market share.
“Agent File (.af): An open file format for serializing stateful AI agents with persistent memory and behavior. Share, checkpoint, and version control agents across compatible frameworks.” (repository description)
- Stars
- 1,216
- Forks
- 119
- Open issues
- 10
- Last commit
- Oct 13, 2026 (27 days ago)
- License (GitHub)
- Apache-2.0
Links and sources
- Official siteagentfile-directory.vercel.app
- GitHub repositorygithub.com/letta-ai/agent-file