Iterate in the chat — and undo anything

LESSONLesson 1 · ~20 min

🎯Goal. Refine the script conversationally, then learn the single command that makes experimenting risk-free.

▶ Try this prompt

Also write the results to a summary.csv file, and skip any columns that are completely empty.

Send this as a follow-up in the same Aider session — it keeps editing the existing file instead of starting over.

1Keep the session open and describe your next change in plain English. Aider applies it to the existing code and commits the new version — each instruction is its own clean Git commit.
2If a change is wrong or you don't like it, type /undo. Because Aider committed the edit, /undo cleanly reverts that last AI commit — nothing is silently overwritten.
3Work in small, focused steps: one clear request at a time gives the model less to misread and keeps each commit easy to review.

✓You'll see. The script updating in place across several requests, each one a separate commit — and a clean rollback whenever you run /undo.

💳Cost. Each request is one metered call to your chosen LLM; grouping related changes into one clear message spends fewer tokens. /undo is free — it is just a Git revert.

💡Takeaway. You drive Aider conversationally, and because every edit is a Git commit, /undo makes every experiment safe to try.