Reticle

Reticle is an AI app testing tool that runs inside applications to verify code changes made by AI agents by monitoring network, state, and console activity.

Reticle provides AI-driven testing that functions from inside an application, rather than relying on visual screenshots or external oversight. The platform observes user flows by reading network calls, the application's internal state, and console outputs to determine if code changes maintain expected functionality. It integrates with development workflows to re-check specific flows, such as checkout processes, after every code change. By replaying previously recorded flows, it allows AI coding agents to verify their own work at a low token cost. The SDK is open source and designed to work with tools like Claude Code, Cursor, and MCP agents, focusing on reproducible results without requiring manual intervention.

Reticle at a glance

Best for: Software engineer
Runs on: Web, CLI, open source
Pricing: Free to start; enterprise plans available.
Released: June 2026
Category: AI coding tool
Website: reticle.sh

Key features

Replays recorded application flows on every commit
Reads network, state, and console data during execution
Integrates with Claude Code, Cursor, and MCP agents
Runs automated verification tests locally
Generates failure reports including network traces and state logs
Functions as an Apache-2.0 open-source SDK

Use it for

Verifying functional flows like user checkout
Detecting silent 500 errors and UI-store desyncs
Catching double-submit and dead handler bugs
Testing code changes made by AI agents

Alternatives to Reticle

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REA — It provides verified evidence and pseudocode without requiring source code.
Reverify — Prevents AI hallucinations by grounding all structural and behavioral claims in binary or source artifacts.

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