Every AI agent decision (prompts, tool calls, edits, multi-agent handoffs) recorded into a tamper-evident, verifiable history. Debug why the agent did what it did without grepping text logs. When customers or auditors ask what your agent did on Tuesday, prove it in one link. Sits underneath whichever agent stack or context graph you already use. Works with Claude Code, Cursor, Codex, Continue, and any tool that emits webhook events.

Hey everyone, Saravanan here. Started building world-model-mcp a while back to help coding agents maintain context across sessions and avoid repeating mistakes. Focus was on giving agents a structured memory they could actually use reliably. While using it on real projects, it became clear that memory alone was not the full problem. Even when the agent made good decisions, there was no clean way to later understand or prove why a particular decision was made, what context was used, or what constraints were considered. That gap became especially noticeable when I needed to debug something after the fact, review a multi-agent handoff, or answer a straight question about what an agent actually did. Text logs go stale, in-memory state is gone. That is what led to Etch. It records every agent decision into a verifiable history, so you can trace, replay, and validate what happened long after the run. Free to try today. If you build with AI agents and have run into any of this, would love to hear how you are handling it currently. world-model-mcp is Apache-2.0 on GitHub for anyone who wants to look at the memory layer side.

The tamper-evident history part is really nice, especially for audit handoffs. One thing that would help a lot: let me pin a custom note or human decision onto a specific span in the timeline. Right now I can see what the agent did, but if I intervened mid-run or overrode a tool call, I want that context attached right next to it instead of buried in a separate log.

Etch

Trace, replay, and verify every AI agent decision.

Trace, replay, and verify every AI agent decision.