Reference

This part is the lookup desk: command flags, environment variables, exit codes, and the files Veyyon creates on your system. Use it when you need the exact name of a flag, the location of a config file, or the meaning of a return code.

• CLI reference: the veyyon command and every subcommand, plus common flags and config overrides.
• Slash commands: every / command available inside an interactive session, grouped by task.
• Tools reference: model-facing tools (read/edit/write, search, bash/eval, browser, MCP resource access) with params and safety.
• Environment variables: supported common variables grouped by purpose (location, auth, catalog, TLS, install, repair, terminal), plus descoped names.
• Exit codes: the return codes Veyyon uses and how child-process exit status passes through.
• File locations: where Veyyon stores config, sessions, logs, and credentials under ~/.veyyon.

Where to go next: if something is failing, see Troubleshooting; for definitions of terms used throughout the book, see the Glossary.