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Supporting system

BuilderGraph

Open-source ecosystem graph for contributor enrichment, search, APIs, and MCP tools.

Tier
Supporting system
Pillar
OSS infrastructure
Visibility
Public
Status
functional
Date
Jun 2026

Case boundary

Cloudflare-native ecosystem graph with D1 storage, contributor enrichment, full-text search, API endpoints, and MCP access.

Claim boundary

Ecosystem data product; avoid unsupported hiring, ranking, or diligence claims.

BuilderGraph turns open-source ecosystem data into a compact signal surface for agents, builders, and analysts.

It enriches the Electric Capital taxonomy with GitHub metadata, contributor graphs, weekly activity, and ecosystem snapshots on Cloudflare Workers and D1.

System

  • Ecosystem hierarchy with closure-table traversal
  • Repository, organization, contributor, and weekly activity models
  • Full-text search over repos, ecosystems, and organizations
  • Contributor concentration metrics for ecosystem health and dependency risk

Runtime

  • Cloudflare Workers API backed by D1
  • GitHub enrichment pipeline with quota-aware token rotation
  • Tiered stale-refresh policy for hot repos and long-tail repositories
  • API and MCP surfaces for programmatic agent access

Proof

  • D1 write budget self-gating added after a real budget-overrun incident
  • HMAC-signed webhook payloads with timestamp freshness checks
  • MCP tools expose repo search, ecosystem graphing, org summaries, and diffs
  • Pay-per-call agent endpoints use a 402 challenge flow