Dogfood found that /tokens and /cache had spec entries (resume_supported:
true) but no parse arms in the command parser, resulting in:
'Unknown slash command: /tokens — Did you mean /tokens'
(the suggestion engine found the spec entry but parsing always failed)
Fix three things:
1. Add 'tokens' | 'cache' as aliases for 'stats' in the parse match so
the commands actually resolve to SlashCommand::Stats
2. Implement SlashCommand::Stats in the REPL dispatch — previously fell
through to 'Command registered but not yet implemented'. Now shows
cumulative token usage for the session.
3. Implement SlashCommand::Stats in run_resume_command — previously
returned 'unsupported resumed slash command'. Now emits:
text: Cost / Input tokens / Output tokens / Cache create / Cache read
json: {kind:stats, input_tokens, output_tokens, cache_*, total_tokens}
159 CLI tests pass, fmt clean.
60ec2aed9b