SkillZip Pro cuts 38% of skill bundle tokens by compressing across files.

Production skills are directory bundles where only the root loads at activation and references, schemas, scripts and nested subskills load on demand, so compressing the root misses most of the cost while flattening destroys the progressive-loading boundaries (arXiv 2608.30785). Compressing across files, dropping content a reference already gets from the root, removes 38% of bundle tokens and 10.4% of end-to-end per-run tokens with no quality loss on a production content-moderation skill. An unprotected 71% compression setting loses up to 26 accuracy points to one-sided false positives, so the guardrail is doing real work.