Add lib/build-graph.py that builds a NetworkX DiGraph from project docs
and forge API, runs structural analyses (orphans, cycles, disconnected
clusters, thin objectives, bottlenecks), and outputs a JSON report.
Predictor and reviewer agents now call build-graph.py before launching
their Claude sessions and inject the report as context.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
