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Catch the "Almost Right"

Chaos testing toolkit that catches the bugs AI code review misses. Join the waitlist for exclusive early bird pricing.

50% off launch price First access No spam, ever

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66%
of devs frustrated with "almost right" AI code
75%
of AI-generated PRs contain logic errors
68%
missing edge case handling

AI code looks correct.
Until production.

"Vibe coding" was Collins Dictionary's Word of the Year 2025. The hangover is real.

75%
Logic Errors in AI PRs
AI-generated code passes review but contains semantic failures that only surface in production.
CodeRabbit 2025 Report
66%
Debugging "Almost Right"
Developers spend more time fixing AI code that's almost right than writing it from scratch.
Stack Overflow 2025
46%
Distrust AI Output
Nearly half of developers actively distrust AI-generated code accuracy.
Stack Overflow 2025
40%
Critical Security Vulns
Vibe-coded apps have critical security vulnerabilities that slip through.
METR Study 2025
"

The number-one frustration, cited by 45% of respondents, is dealing with AI solutions that are almost right, but not quite, which often makes debugging more time-consuming.

Stack Overflow 2025 Developer Survey

Chaos testing for AI-generated code

Deliberately break your code in controlled ways to expose hidden assumptions and edge cases.

🔌
MCP Server Templates
Pre-built MCP server templates with chaos testing built-in. Stripe, Postgres, OpenAI ready to deploy.
🎯
Stripe Chaos
Rate limits, card declines, webhook delays, amount mismatches. Every edge case your payment code needs.
🔄
Async Jitter
Random delays expose race conditions that only appear in production under load.
🧪
Schema Fuzzer
Edge-case inputs AI never considers: empty strings, SQL injection, Unicode bombs, MAX_INT.
🚀
FastAPI Boilerplate
Pydantic strict mode starter with chaos testing pre-configured. Ship with confidence.

Zero config. Just pytest fixtures.

Install the plugin, and chaos fixtures appear automatically in your tests. No complex setup, no configuration files, no learning curve.

  • Works with your existing pytest setup
  • Type-safe with full IDE autocomplete
  • Configurable chaos modes per fixture
  • Disable with @pytest.mark.no_chaos
test_payments.py
def test_payment_handles_failures(mock_stripe_chaos):
    # Simulate a card decline
    result = mock_stripe_chaos(mode="card_decline")
    
    # Your handler should handle this gracefully
    response = process_payment(result)
    assert response["status"] == "failed"
    assert "card_declined" in response["error"]


async def test_race_condition(force_async_jitter):
    # Add random delays to expose race conditions
    inventory, price = await asyncio.gather(
        force_async_jitter(fetch_inventory()),
        force_async_jitter(fetch_price()),
    )
    # If code assumes order, this catches it
    assert inventory is not None

What AI testing misses

AI generates code that passes happy-path tests. ChaosKit finds what breaks in production.

Without Chaos Testing
  • Tests pass with happy-path data
  • Edge cases discovered in production
  • Race conditions appear under load
  • Payment failures crash the checkout
  • API rate limits cause cascading failures
  • Empty inputs break validation
With ChaosKit Pro
  • Tests deliberately inject failures
  • Edge cases caught before deploy
  • Race conditions exposed by jitter
  • Payment chaos tests all error paths
  • Rate limit fixtures verify backoff
  • Schema fuzzer tests all inputs
⏰ Limited Early Bird Pricing

Get 50% Off at Launch

Join the waitlist now and lock in exclusive early bird pricing. Choose your tier when ChaosKit Pro launches.

Early Bird
$99 $49
Perfect for indie hackers • One-time payment
  • All 10+ chaos fixtures
  • MCP server templates
  • FastAPI boilerplate
  • Email support
  • 1 year of updates

You're on the list! 🎉

Your early bird pricing is locked in. We'll email you when ChaosKit Pro launches.

50% off launch price Lifetime updates First access No spam, ever
📦

Try the OSS version free today

pytest-chaos-ai is open source with 3 core fixtures. Start catching bugs now while you wait for ChaosKit Pro.

pip install pytest-chaos-ai 📋

Questions? Answered.

We're targeting Q1 2026. Waitlist members will be the first to know and get a 48-hour head start before public launch, plus exclusive early bird pricing.

The free pytest-chaos-ai package includes 3 core fixtures (mock_stripe_chaos, force_async_jitter, schema_fuzzer). ChaosKit Pro includes 10+ additional fixtures for OpenAI, Postgres, Redis, S3, Auth, plus MCP server templates and FastAPI boilerplate.

Early Bird ($49) includes all 10+ chaos fixtures, MCP templates, FastAPI boilerplate, email support, and 1 year of updates. Pro ($149) adds lifetime updates, priority support, early access to new fixtures, and private Discord channel access. Both are one-time purchases.

No. One-time payment, you own it forever. Early bird and Pro tiers both include lifetime updates. No recurring fees, no license servers.

After purchase, you'll receive a download link with the complete ChaosKit Pro kit: all fixtures, MCP templates, FastAPI boilerplate, and documentation. It's a zip file you extract and use immediately.

Python 3.9, 3.10, 3.11, 3.12, and 3.13. Tested on Linux, macOS, and Windows. Works with pytest 7.0+ and 8.0+.

Absolutely not. You'll only receive: (1) Launch announcement with your early bird link, (2) Major product updates. That's it. Unsubscribe anytime with one click.

Stop debugging "almost right" code.

Be first in line when ChaosKit Pro launches. Lock in your early bird pricing now.

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We'll notify you when ChaosKit Pro is ready.