# mabl adds pre-PR checks for code written by coding agents > Source: > Published: 2026-10-21 12:30:13+00:00 # mabl adds pre-PR checks for code written by coding agents **Co-founder Dan Belcher is extending mabl's testing pitch to software written by coding agents, with guardrails, change-impact analysis and terminal-based checks.** By [RuntimeWire Staff](https://runtimewire.com/author/runtimewire-staff) · Published Primary source: [PR Newswire](https://www.prnewswire.com/news-releases/mabl-introduces-agentic-testing-harness-to-clear-the-verification-bottleneck-created-by-coding-agents-302914831.html) ## Why it matters As coding agents increase software output, mabl is betting that teams will need testing controls outside the agents that write the code. Its reported activity shows adoption inside customer workflows; independent accuracy and outcome data would show whether those checks earn trust. On October 21st, 2026, [mabl](https://www.mabl.com/?ref=runtimewire) [introduced tools](https://www.prnewswire.com/news-releases/mabl-introduces-agentic-testing-harness-to-clear-the-verification-bottleneck-created-by-coding-agents-302914831.html?ref=runtimewire) to check code written by coding agents before developers open a pull request, extending co-founder Dan Belcher's long-running bet that faster software development needs a stronger testing layer. mabl says its new capabilities let teams set rules for agents, identify relevant tests and inspect a change's impact from the terminal.… When you purchase through links in our articles, [we may earn a small commission](https://runtimewire.com/affiliate-monetization-standards). This doesn’t affect our editorial independence.