RepoCaveman, a Claude Code compression plugin, promised 75% fewer tokens while preserving technical accuracy. In a head‑to‑head test, the author pitted the plugin against the simple prompt “be brief.” Both approaches delivered comparable quality and token counts, leaving the lightweight default untouched. The experiment ran 324 prompts across six categories, scoring each answer against a strict rubric for evaluation consistency.

The benchmark measured token savings: baseline averaged 636 tokens, “be brief.” cut 34%, averaging 419. RepoCaveman’s lite and full modes matched that reduction, while the ultra setting produced the longest responses in the plugin group. Category‑level analysis revealed the ultra mode shortens bug‑diagnosis and architecture trade‑offs, but expands multi‑step setup and security warnings due to an Auto‑Clarity safety escape mechanism.

Beyond token counts, RepoCaveman enforces a uniform output structure through session hooks and slash commands, a feature absent from the two‑word prompt. This consistency aids downstream tooling that relies on predictable prose. The study concludes that when uniformity is essential, RepoCaveman outshines a generic brevity request; otherwise, a simple “be brief.” delivers equivalent brevity without added complexity for developers today.