Merv was created to solve two problems: agent reliability, and the visibility of agent work.

Models and harnesses get better at the task every month. So Merv is not an agent harness. It is a gating mechanism: agent work moves forward only by passing adversarial review.

claude code · codex · cursor · gemini cli · opencode

The experiment loop

The plan is reviewed before anything runs. The report is reviewed before anything counts. Rejections send the work back.

Planwrite the experiment planDesign reviewthe plan must passExecuterun locally or in a sandboxResults reviewthe report must passCompletefindings recordedrevise the planfix run or reportexperiment proved faulty
Planwrite the experiment planDesign reviewthe plan must passExecuterun locally or in a sandboxResults reviewthe report must passCompletefindings recordedrevisethe planfix runor reportprovedfaulty

The project loop

After each wave of experiments, five lenses ask what worked, what failed, and what hasn’t been tried. The synthesis is reviewed and sets up the next wave.

Completed worka wave of experimentsSynthesisreport · graph · specReflection reviewadversarial checkPublishsets up the next wave3 core lenses + 2 designed for this projectAmplify · what workedAvoid · what failedEntropy · weird betsAgent-chosen lensAgent-chosen lensrevise synthesislenses fall short
Completed worka wave of experiments3 core lenses + 2 designed for this projectAmplify · what workedAvoid · what failedEntropy · weird betsAgent-chosen lensAgent-chosen lensSynthesisreport · graph · specReflection reviewadversarial checkPublishsets up the next waverevisesynthesislensesfall short

How it fits

Adapters plug into the agents you already use. The backend holds the research state. The frontend lets you watch — from strategy to a single run. Execution goes to cloud sandboxes or your own machine; your checkout and SSH keys never leave it.

In the open

The code is public — the gates, the reviewer prompts, the proxy that touches your files. A gate you can read.

Install

claude plugin marketplace add https://rapidreview.io/marketplace.json
claude plugin install merv@rapidreview

Restart Claude Code and connect a project. Codex, Cursor, Gemini CLI, OpenCode: setup guide.

Try Merv →Clone it, self-host it →