Observed arrival · 2026-10-21
Nineproof’s replay tests for AI agents
Nineproof describes a testing tool that turns production failures by tool-using AI agents into repeatable checks for code changes.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Teams operating tool-using AI agents
- Worth noticing
- The sample pull-request view compares eight-run outcomes with main and flags three of 123 tests as worse.
Field notes
The walkthrough’s example starts from a support conversation and preserves the account state and tool responses needed to replay it. It shows an agent calling a cancellation tool before confirmation, then compares repeated outcomes with the main branch; the page also says tool calls can be mocked to avoid real refunds or emails.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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