signals.py: tool_bucket helper + three tool_histogram-based extractors that the
outcome/marker signals were blind to — sig_infra_overhead (hub+task+schema share
of tool calls over threshold), sig_schema_thrash (repeated ToolSearch), and
sig_tool_thrash (one tool dominating). Thresholds in build_context. 8 new tests;
suite 88/88 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
detect/quality.py: is_real_coding_session drops health-checks / smoke-tests /
interrupted / trivially-short sessions (event floor, repo present, substantive
tool activity, non-trivial prompt). Wired into run_detect so signals only form
over real sessions — fixes the abandoned false-positive. [detect.quality] knobs;
existing detect/curate fixtures made realistic. 8 new tests; suite 80/80.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
