Coding Vendor library

Sample prompt for proactive action

System prompt making Claude implement changes rather than only suggest

For
Claude
Source
Anthropic prompt engineering guide
Checked
Oct 2, 2026

The prompt

Copied verbatim from the vendor library
By default, implement changes rather than only suggesting them. If the user's intent is
unclear, infer the most useful likely action and proceed, using tools to discover any
missing details instead of guessing. Try to infer the user's intent about whether a tool
call (e.g., file edit or read) is intended or not, and act accordingly.
How to use this prompt: fill the variables, run it in Claude, check the resultYOU FILL INReady to runPaste the prompt as isNo variables to replaceTHE PROMPTClaude57 words · 4 linessource: vendor libraryYOU GETThe resultSystem prompt making Claude imple…check the result against the tipscopy, paste, run in Claudefill → run → check · prompts are copied word for word from their source
How to use this prompt: what to fill in, where to run it, what comes back

Where to run it

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