A new doctor diagnostic scans configured deny-within-allow filesystem paths on Linux/WSL for zero-byte, non-writable leftover mask files from a killed sandboxed session, since these can silently break "don't ask again" persistence. It surfaces a paired issue and fix telling the user to remove the stale file.
Names in the bundle/doctor
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on How Claude remembers your project touched a line naming /doctor after this was published.
To have Claude check these files for outdated or conflicting instructions, run `/doctor prompt-audit` in a session. Claude reads your CLAUDE.md, CLAUDE.local.md, and AGENTS.md files, plus the rules, skills, commands, subagents, and output …memory see the edit
Confirmed since
Anthropic's documentation has since written up /doctor, on CLI reference.
| `claude doctor` | Print read-only installation and settings diagnostics from the terminal without starting a session, including install health, settings-file validation errors, and Remote Control eligibility. For the in-session setup che…cli-reference see the edit
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up /doctor, on CLI reference.
Anthropic's release notes agree
Added a /doctor warning for stale sandbox mask files left by a killed session