What you can do with it "Where should this boundary be before we refactor?" BGI groups units by behavioral role (COV tokens + DRS clustering) so likely component boundaries are visible. "Which subsystem coupling is risky?" BGI surfaces high-coupling seams and fuse-boundary signals between clusters so integration risk is easier to spot. "How do we plug architecture data into automation?" BGI emits machine-readable artifacts (bgi-graph.json, fuse-graph.json) plus optional human context (bigindexer.md). "How do we make AI changes less random?" MCP tools (task_fingerprint, behavioral_twins, twin_context) ground prompts in in-repo behavior patterns. "Can I run this automatically on PRs as a live example?" Yes — use the dedicated action repo ahmedxuhri/bigindexer-pr-risk-bot to auto-comment PRs with blast radius, seams, and risk hints.

Big Indexer

Index by behavioral role and emits architectural boundaries

Index by behavioral role and emits architectural boundaries