Live tool-use A/B for session_search schema changes: arms are git refs
(tools/session_search_tool.py extracted per ref), tasks run a minimal
agent loop over OpenRouter against a freshly seeded temp session DB with
programmatic oracles — discovery, forced forward-scroll, AND-miss
broadening, verbatim link emission, profile-link resolution, browse.
Checked-in results/pr95570/ holds the 108-run battery (3 models, 3 reps,
2 arms) that validated the PR #95570 schema diet before merge:
base 49/54 vs diet 52/54, avg tokens/task -25%.
b2bd1ac63f