Guide maps 8 places API keys linger after an agent session

On 2026-11-02, DEV Community's AI section published a troubleshooting guide for AI coding users titled "After one agent session, your API key may be left in 8 places." The guide describes a common workflow: a user asks an agent why a request keeps returning 401, exports the key in the shell, pastes it into the chat so the agent can test the call, and the test passes. After the session is closed, the key remains on disk in places the user never checked.

According to the article, once an API key has been pasted into an agent session, it can persist in plaintext in up to eight locations, including transcripts and shell history. The author's recommended cleanup order is to revoke the current key and issue a replacement first, then work through a checklist, searching and clearing each location one by one. To back up the claim that session content really does reach disk, the guide quotes Claude Code's own documentation stating that text that passes through tools is written to the on-disk transcript. The piece is framed as a practical checklist for developers shipping with AI coding tools such as Claude Code, and it is part of a series of short guides on agents, RAG, prompts, observability and related topics. As of this report, the article presents the checklist as guidance rather than reporting on any related incident.