Reverse engineering Claude Code(kirshatrov.com) |
Reverse engineering Claude Code(kirshatrov.com) |
It also responds to the Task summary like you typed the message sometimes, like “That’s a fascinating analysis!” so kind of quirky.
It isn't hard to think of a simple example in which Claude.md can be written to by the LLM to allow accessing endpoints not whitelisted by the user by smuggling a base64 encoded payload that then gets decoded by a subroutine it wrote to a file without you noticing. Or realizing it can't use the WebFetchTool but it can write a script to do manual DNS resolution and then use bash TCP sockets instead of curl in case it is hardened to not be able to use curl.
I Eventually learned to trust Claude, and just gave it access to everything. It's crazy how useful having AI do tasks for you like setting up servers, configuring them etc (one exapmple, I asked claude to create a webhook for my deployment pipeline, and it wrote the shell script, and did the server side configuration in 1-shot. I did't have a github tool so I did that manually in the UI)
I was amazed and excited by how good Claude Code is compared to Windsurf/Cursor and wanted to inspect the working. I inspected the logs and got an understanding on its system prompt as well the tools used. It is a great combination of prompt engineering, tool calls, tools orchestration.
Just set the base url to a local ngrok and it will log the request
This gives the full prompt with all tool calls
With a proxy you can have it forward requests to Anthropic if you want to see it actually working too and not just the initial request (since it will fail without forwarding them)
i'll have to dig on my disk i guess
A human getting paid 1 cent per second ($36.00 per hour) is 75k/yr (cost to business is ~2x that).
So if Claude manages to save 11 seconds of human time for 11 cents, that would be a good deal.
Tax section 174 makes the employee costs amortised, so spending on Claude as an expense to save employee costs is more valuable than first appearances.