Agent Sightings Real agent use cases

Debug overnight

As described in the source, codex shows up in a write-up about debug overnight. The linked post is the primary source for steps and outcomes.

Agent or tool
Codex
Topic
Software Development
Reported on
Hacker News
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 106 sightings filed under Software Development on Agent Sightings (number 30 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.

In this repo, debug overnight. Read relevant code, apply a minimal patch, run available checks, and summarize the diff. Stop before merge or deploy.

The prompt breaks down into 3 steps you can check as the agent works:

  1. In this repo, debug overnight.
  2. Read relevant code, apply a minimal patch, run available checks, and summarize the diff.
  3. Stop before merge or deploy.

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 Hacker News: https://news.ycombinator.com/item?id=46993231. Our summary is a paraphrase; details are in the source.

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