Ásgeir Thor JohnsonAnthropic — which file is which product?
The bare claude-<model>.md files in this folder are the claude.ai system prompts — the prompt served to that model in the Claude web/mobile app (claude.ai). They are not API prompts (the Claude API injects no system prompt) and not Claude Code prompts.
| File pattern | Product |
|---|---|
claude-fable-5.md, claude-opus-4.8.md, claude-sonnet-5.md, … |
claude.ai app system prompt for that model |
claude-*-no-tools.md |
claude.ai with tools disabled |
claude-code/ |
Claude Code (the CLI/agent harness) |
claude-design.md |
Claude Design |
claude-cowork/ |
Claude Cowork |
claude-for-excel.md, claude-for-word.md, claude-in-powerpoint.md |
Claude in Microsoft 365 |
claude-in-chrome.md |
Claude in Chrome extension |
claude-mobile-ios.md |
claude.ai iOS app |
anthropic_reminders.md, sonnet-4.6-reminders.md, research_instructions.md, visualize.md |
claude.ai injected fragments (reminders, research, artifacts) |
official/ |
Prompts Anthropic publishes themselves (release-notes versions — shorter than the real served prompts above) |