Phistory — Development skill for Claude Code

Phistory

[中文](README_zh.md)

Phistory tracks how system prompts change across popular coding-agent CLIs like Claude Code, Codex, DeepSeek Harness, Antigravity, Grok Build, MiniMax Code, Kimi Code, MiMo Code, OpenClaw, Hermes, Kimi CLI, opencode, Pi, and Oh My Pi.

Open the web viewer to compare prompt snapshots across versions and see how agent design changes through prompts, tools, policies, and runtime instructions.

**Start here:** [phistory.cc](https://phistory.cc/)

Checks for new releases hourly. Archive last updated: **2026-08-27 11:58 UTC**.


Why Use It

• Follow how Anthropic, OpenAI, and other agent builders iterate on system prompts over time.
• See when new tools, permission checks, model defaults, and user-confirmation rules are added.
• Compare how different CLIs structure agent behavior, tool use, and developer-facing constraints.
• Cite stable prompt snapshots in posts, research notes, audits, or debugging reports.

How It Works

For each supported release, Phistory installs the exact CLI package and runs each configured snapshot through [`claude-tap`](https://github.com/WEIFENG2333/claude-tap), captures the prompt-bearing HTTP request without calling the real model provider, and stores the result under `captures///variants//` with `prompt.md`, `trace.jsonl`, and `meta.json`. Capture configurations use a `default` snapshot as their baseline; selected models or modes are stored as additional variants.

For recent Claude Code releases, Phistory also extracts static prompt-like strings from the installed package and stores them under `captures///static/`. The candidate archive keeps the raw extraction input so matching rules can be improved later without reinstalling every historical package.

GitHub Actions checks automatically tracked CLI releases every hour and commits new snapshots when they appear.

Local Development

Use the hosted viewer at