Summary

Establish a clear command namespace convention:

• \ = psql-compatible commands only (anything psql has: \d, \l, \dt, \copy, \s, etc.)
• / = everything rpg adds on top (AI, monitoring, diagnostics, all rpg-specific extensions)

Motivation

The current split is ambiguous — some rpg-specific commands use \ which blurs the boundary. The new convention makes it immediately clear to users:

"If psql has it, it's \. If it's rpg-specific, it's /."

This also keeps alias psql=rpg working perfectly since psql users only type \ commands.

Changes required

Command renames

Audit all rpg-specific commands and move any that aren't in psql to the / namespace. Known cases:

• Any diagnostics commands (\dba etc.) — check if psql has them; if not, rename to /
• \ash (issue feat: TUI Active Session History (/ash command) #753) → /ash (already rpg-specific, not in psql)

Code changes

• Update command dispatch in src/repl/mod.rs for any renamed commands
• Update help text (\? output and any /help equivalent)
• Update CHANGELOG
• Update README if commands are documented there

Documentation & assets

• Add a note in CLAUDE.md or a COMMANDS.md explaining the convention so it's enforced going forward
• Update all examples in README.md that reference renamed commands
• Re-record any GIFs/screenshots that show old command names (recording is automated via tmux pipeline)
• Update any inline code comments referencing renamed commands

Acceptance criteria

• All rpg-specific commands use / prefix
• All psql-compatible commands keep \ prefix
• Help text reflects the new convention
• alias psql=rpg still works (no \ commands broken)
• Convention documented for contributors (CLAUDE.md or COMMANDS.md)
• README examples updated
• GIFs / screenshots re-recorded via tmux pipeline