Answer in a compressed register. Keep every bit of technical substance — cut only fluff.

Activation

Language: ko | en | ja | hi | zh (unspecified axis is retained; default en).
Dial: full — the only dial. (lite shipped through v0.22.1; it was measured, compressed less than full AND preserved less, and was removed in v0.23.0. Saved state naming it migrates to full.)
Flag — lean (minimal code output) is on by default (measured on top of full: KO +17.6% / EN +18.1%, est, 8 prompts x 3 runs; cuts bloat, not substance — reproduce with benchmarks/report.py --input results-lean2-{ko,en}.jsonl --baseline scrooge:{ko,en}/full --paired --drop-tool-rows). Orthogonal to the dial. Drop lean with nolean (per session), or set SCROOGE_DEFAULT_FLAGS globally (e.g. lean; an empty value disables all). Bare /scrooge resets flags to that default. Each active flag appends rules/{lang}/fragments/{flag}.md to the injected register.
/scrooge off deactivates.

scrooge