Several coding agents in parallel
A developer runs multiple coding agents at once on separate low-risk tasks and reviews their output as it lands.
- Agent or tool
- Codex
- Topic
- Software Development
- Reported on
- Blog
- Added
- 2026-10-15
Why it matters
Coding agents are moving from autocomplete to doing whole tasks: reading a codebase, making a plan and changing many files. This case is a concrete example of where that works in practice. It is one of 221 sightings filed under Software Development on Agent Sightings (number 137 by interest), and one of 32 involving Codex.
How you could try it
Here is a reusable prompt, written by us in our own words, that captures the task. Paste it into Codex or any similar agent and adjust the details to your situation.
Take this small, well-defined task, work on its own branch, and open a draft PR with a short description and test results.
Tip: Work on a fresh branch, ask for a plan before edits, and review the diff and test results before merging.
Source
Read the original first-hand account on Blog: https://simonwillison.net/2025/Oct/5/parallel-coding-agents/. Our summary is a paraphrase; details are in the source.
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