See what your coding agent sends. Mask what you can.
An open-source hook and local proxy for Claude Code, Codex, Copilot CLI and VS Code. In Claude Code it masks secrets and personal data in tool results before the model reads them, and shim watch shows what a session sent and cost. No account, no telemetry.
shim-cli launched on Product Hunt on 2026-10-18 and has 187 upvotes and 26 comments so far.
This tool is open source.