t-429
Commit Omni/Agent/SkillBrowser.hs and Omni/Agent/Summarize.hs, and remove Omni/Agent/Op/Legacy.hs plus doc references if safe.
Committed skill-browser and summarize utilities, updated README, and removed Omni/Agent/Op/Legacy.hs (no remaining references).
Committed skill-browser and summarize utilities, updated README, and removed Omni/Agent/Op/Legacy.hs (no remaining references).