#80 · Primary category： Prompt Engineering Tools
phistory
Phistory automatically archives versioned system prompt snapshots from agent CLIs like Claude Code, Codex, OpenClaw, and Hermes.
Project last updated：08/29/26
GitHub Stars
562
Forks
40
Contributors
2
License
MIT
Why we included this project
How do the system prompts behind popular coding agents change? Phistory answers that by installing each released CLI package, capturing the prompt it would send to the model, and filing it as a versioned snapshot for Claude Code, Codex, opencode, and a dozen or so other agents. The web viewer diffs prompts between versions and between agents, so you can see when a vendor adds a tool or tightens a permission check. That's handy if you write your own agent prompts or want to compare how different CLIs approach the same task, and it gives you a stable prompt to cite in a post or audit. The archive updates itself hourly, and the local commands let you reproduce captures or backfill older versions.
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