Portfolio

Selected engineering proof: what I built, the systems underneath, and the tradeoffs that mattered. Raintree product pages live at raintree.technology.

Agent Safety & Evals

Context & Developer Tools

Data & Intelligence Systems

Product SaaS

Systems & Low-Level

Music & Creative Systems

Developer data / personal case study

BuilderGraph

ecosystem graph and MCP tools

What I built

Open-source ecosystem graph with contributor enrichment, search, APIs, and MCP access.

Stack

Cloudflare Workers / Hono / D1 / Kysely / GitHub API / MCP / Stripe / Better Auth

Runtime

Five-phase enrichment: metadata, contributor counts, contributor graph, stale refresh, tag extraction.
Weekly and daily snapshot jobs refresh repo metrics, ecosystem metrics, pulse, market share, and diffs.
HTTP API, `/api/agent/*`, OpenAPI, JSON-RPC MCP, webhook watches, and billing all mount on one Worker.

Data model

Electric Capital taxonomy seeds ecosystems, repositories, and organizations before GitHub enrichment.
Repo, org, contributor, metrics-history, ecosystem-history, watch, API-key, and billing tables live in D1.
Checked-in public snapshots cover static site mode while Worker/D1 routes can be reactivated for live API mode.

Techniques

Multi-token GitHub PAT pool with rate-limit awareness.
Rules-based pulse/concern/momentum/market-share heuristics over current state plus weekly history.
Schema drift gate requires D1 migrations and `schema.sql` to stay equivalent.
Cost guardrails park crons/routes, disable workers.dev fallback, and keep public reads on static snapshots.

Verification

Contributor concentration metrics surface ecosystems that depend on a small number of maintainers or organizations.
Signed webhooks include timestamp freshness checks so ingest events cannot be replayed blindly.
Budget-aware D1 write gates keep enrichment from exhausting serverless storage and write limits.
MCP tools return search, graph, summary, signal, and diff outputs designed for agent consumption instead of only human dashboards.

Portfolio

Selected engineering proof: what I built, the systems underneath, and the tradeoffs that mattered. Raintree product pages live at raintree.technology.

Agent Safety & Evals

Context & Developer Tools

Data & Intelligence Systems

Product SaaS

Systems & Low-Level

Music & Creative Systems

Developer data / personal case study

BuilderGraph

ecosystem graph and MCP tools

What I built

Open-source ecosystem graph with contributor enrichment, search, APIs, and MCP access.

Stack

Cloudflare Workers / Hono / D1 / Kysely / GitHub API / MCP / Stripe / Better Auth

Runtime

Five-phase enrichment: metadata, contributor counts, contributor graph, stale refresh, tag extraction.
Weekly and daily snapshot jobs refresh repo metrics, ecosystem metrics, pulse, market share, and diffs.
HTTP API, `/api/agent/*`, OpenAPI, JSON-RPC MCP, webhook watches, and billing all mount on one Worker.

Data model

Electric Capital taxonomy seeds ecosystems, repositories, and organizations before GitHub enrichment.
Repo, org, contributor, metrics-history, ecosystem-history, watch, API-key, and billing tables live in D1.
Checked-in public snapshots cover static site mode while Worker/D1 routes can be reactivated for live API mode.

Techniques

Multi-token GitHub PAT pool with rate-limit awareness.
Rules-based pulse/concern/momentum/market-share heuristics over current state plus weekly history.
Schema drift gate requires D1 migrations and `schema.sql` to stay equivalent.
Cost guardrails park crons/routes, disable workers.dev fallback, and keep public reads on static snapshots.

Verification

Contributor concentration metrics surface ecosystems that depend on a small number of maintainers or organizations.
Signed webhooks include timestamp freshness checks so ingest events cannot be replayed blindly.
Budget-aware D1 write gates keep enrichment from exhausting serverless storage and write limits.
MCP tools return search, graph, summary, signal, and diff outputs designed for agent consumption instead of only human dashboards.

Selected projects

What I built

Stack

Selected projects

What I built

Stack