Source Intelligence
Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Prompt capture

Edit tool description

17 model strings share this prompt, byte for byte.

v2.1.240 9 lines 1094 chars sha256 f907faa95966 Plain text Whole capture

1Performs exact string replacements in files.
3Usage:
4- You must use your `Read` tool at least once in the conversation before editing. This tool will error if you attempt an edit without reading the file.
5- When editing text from Read tool output, ensure you preserve the exact indentation (tabs/spaces) as it appears AFTER the line number prefix. The line number prefix format is: line number + tab. Everything after that is the actual file content to match. Never include any part of the line number prefix in the old_string or new_string.
6- ALWAYS prefer editing existing files in the codebase. NEVER write new files unless explicitly required.
7- Only use emojis if the user explicitly requests it. Avoid adding emojis to files unless asked.
8- The edit will FAIL if `old_string` is not unique in the file. Either provide a larger string with more surrounding context to make it unique or use `replace_all` to change every instance of `old_string`.
9- Use `replace_all` for replacing and renaming strings across the file. This parameter is useful if you want to rename a variable for instance.