Know your app works. Before your users do.
Reachability runs continuous checks on your AI agents and app flows. It verifies every GitHub PR is correct, testable, and human readable. This is the era of the Agentic Harness.
Built for shipping agents you can trust
Stop guessing if your agentic code works. Reachability gives you clear, verifiable answers on every change.
Verify Agent Flows
Test your agentic workflows against real inputs with production-grade assertions. No black boxes. See exactly how your agents behave in production scenarios, catch edge cases, and verify multi-step reasoning paths before they ship. Every check runs in isolation so you know failures are real, not flaky.
Readable PRs
Every GitHub check returns a plain-language summary humans can review in seconds. Understand what changed, why it passed or failed, and what inputs triggered the behavior. No more digging through stack traces or LLM logs. Reviewers get context, you get confidence, and your team moves faster.
Agentic Harness
Treat your agents like production systems from day one. Continuous verification means fewer surprises after deploy. Catch failures before merge, validate tool use and API calls, and ensure your agents degrade gracefully. Ship reliability, not hope. The harness becomes your safety net for every iteration.
Why Reachability
Agentic systems break differently. A traditional unit test might pass while your agent silently calls the wrong tool, returns hallucinated data, or loops forever on edge cases. You don't find out until a user sees it live. By then, trust is broken and debugging is painful because agent traces are opaque and non-deterministic.
GitHub PRs make it worse. A 500-line diff touching prompts, tools, and orchestration logic is impossible to review by hand. What changed semantically? Does the agent still handle refunds? Will it leak PII now? Reviewers guess, rubber-stamp, and hope CI catches it. But CI doesn't understand intent. It can't tell you if the agent behavior actually matches what you think you shipped.
You need a harness. Reachability runs your agents through real scenarios on every PR. It checks outputs, validates tool calls, and writes back a human summary: "Agent now asks for confirmation before sending email" or "Fails on empty input - returns error instead of refunding $0". This is how you ship agents with confidence. Like tests for code, but for reasoning.
How it works
Get set up in minutes. Start verifying your agents today.
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Connect your repo
Install the Reachability GitHub app. It works with your existing workflow. No code changes needed to get started.
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Define reachability checks
Write simple checks that describe what your agents should do. Use real inputs, expected outputs, and plain English.
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Get clear pass/fail + summary
Every PR gets a check with a human-readable summary. Know exactly what works, what broke, and why before you merge.
Ship agents that actually work
Join teams using Reachability to verify their agentic systems before they hit production.
Get Started Free