# San Diego C++ Meetup #84: March 2026 Edition - UNDO - Agentic Debugging Using Time Travel

DevFeed: [San Diego C++ Meetup #84: March 2026 Edition - UNDO - Agentic Debugging Using Time Travel](<https://devfeed.tech/articles/san-diego-c-meetup-84-march-2026-edition-undo-agentic-debugging-using-time-travel-51145.md>)

Original publisher: [Read original article](<https://vorbrodt.blog/2026/03/21/san-diego-c-meetup-84-march-2026-edition-undo-agentic-debugging-using-time-travel/>)

Author: Kobi

Published: 2026-03-21T21:57:41Z

Content type: article

Language: en

Sources: [Vorbrodt's C++ Blog](<https://devfeed.tech/sources/vorbrodt-s-c-blog.md>)

Topics: [C++](<https://devfeed.tech/topics/c-plus-plus.md>), [debugging](<https://devfeed.tech/topics/debugging.md>), [Large Language Model](<https://devfeed.tech/topics/llm.md>), [JIT](<https://devfeed.tech/topics/jit.md>), [Claude](<https://devfeed.tech/topics/claude.md>)

Tags: [c-plus-plus](<https://devfeed.tech/tags/c-plus-plus.md>), [claude](<https://devfeed.tech/tags/claude.md>), [debug](<https://devfeed.tech/tags/debug.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [jit](<https://devfeed.tech/tags/jit.md>), [kobi](<https://devfeed.tech/tags/kobi.md>), [large-language-models-llms](<https://devfeed.tech/tags/large-language-models-llms.md>), [qualcomm](<https://devfeed.tech/tags/qualcomm.md>), [san-diego-c-plus-plus-meetup](<https://devfeed.tech/tags/san-diego-c-plus-plus-meetup.md>)

## AI overview

A report on the 84th San Diego C++ Meetup, featuring Greg Law of Undo discussing time-travel debugging. The talk covered reverse reasoning from failures, JIT-based recording of nondeterministic events for deterministic replay, and using LLM-driven tools to diagnose a reference-counting bug in CPython.

## Source excerpt

Hello everyone! Last Tuesday, March 10th, we held our 84th San Diego C++ Meetup. This was a special "super-fast" edition where we broke our usual virtual routine to meet in person at Qualcomm. It was a packed house with great pizza and even better technical discourse. Our New Home on Luma As mentioned in our [...]