work · 55 original repos · 15 npm packages
A decade of code,
told in seven case studies.
Each thread spans years and multiple repositories — work shipped with the team at one company, one library that's entirely mine, plus the public OSS that fell out of both. Read the long-form, or scroll for the index.
Case studies
012025 — nowA Customer-Facing AI Assistant & API Docs Portal
A self-serve API documentation portal — with an embedded AI assistant — on top of the company's private-market intelligence APIs. Shipped in 2026, and every week since has gone into making it harder to break. An internal LLM gateway the year before was the warm-up.
01
2025 — now
A Customer-Facing AI Assistant & API Docs Portal
A self-serve API documentation portal — with an embedded AI assistant — on top of the company's private-market intelligence APIs. Shipped in 2026, and every week since has gone into making it harder to break. An internal LLM gateway the year before was the warm-up.
- A self-serve API docs portal on Fumadocs — access-scoped, long-form guides kept in sync with the code, the assistant embedded in it
- A build-time OpenAPI pipeline feeding both the docs and the assistant's context, so neither drifts from the API
- An intent router that picks the model per question — multi-model by default, routing cost measured alongside answer cost — across OpenAI, Anthropic, Google, OpenRouter and BYOK, new frontier models absorbed within days
- Versioned prompt sets, tuned per model tier and assembled per request rather than hand-maintained as one growing file
- A tool surface — search, schema discovery, entity resolution, docs retrieval, web search, export — under aggregation-first query discipline, plus a skills layer of named, access-gated research workflows invoked inline
- An answer surface built for reading — streaming markdown legible mid-stream, tables, diagrams, math, charts, voice, replies in the reader's language, and server-side Word / Excel / PDF export as it's read
- Layered prompt-injection and anti-disclosure defenses, pinned by an evaluation harness and regression tests; selective prompt caching with cost attributed per response
- Reliability that doesn't demo — concurrency limits, layered timeouts, a graceful answer when the clock runs out, provider errors classified rather than leaked — plus audit-grade logging and post-mortem tooling
- A read-only MCP server surface so Claude / Cursor / VS Code get the API without a pasted token — architected and first shipped by me, current version co-built — all in compressed months alongside platform, design and data
022026microcharts — Word-Sized Charts for React
106 handcrafted chart types small enough to sit inside a sentence, a table cell, or a streamed AI reply. Zero runtime dependencies, accessible by default, server-component safe. Mine, start to finish — design, code, docs, site.
02
2026
microcharts — Word-Sized Charts for React
106 handcrafted chart types small enough to sit inside a sentence, a table cell, or a streamed AI reply. Zero runtime dependencies, accessible by default, server-component safe. Mine, start to finish — design, code, docs, site.
- 106 stable chart types across four tiers — core, decision, expressive, frontier — each grouped by the question it answers, not the shape it draws
- One grammar for all of them: a chart is `data` plus a generated sentence, so a model that has seen one can write them all
- Measured, not rounded — ~2–7 kB gzip interactive (median 5.0), ~1–4 kB static (median 2.6), budget-gated in CI; 500 server-rendered sparklines in 5.5 ms
- Zero runtime dependencies — no chart engine, no D3, just SVG; React is the only peer and CI enforces it
- Static charts are hook-free with zero client JavaScript; interactivity is an opt-in subpath composing the static twin — one contract: hover / arrows activate a unit, click or Enter pins, Escape clears
- Every chart is an `img` with a natural-language summary built from its own data — accessibility that can't drift; themed through ~two dozen CSS custom properties, `defineTheme` deriving a colour-blind-safe palette and dark twins from one accent
- Machine surfaces alongside the human ones — llms.txt, llms-full.txt, a catalog.json of every chart's props and data shapes — and a documented no-list (pie, speedometer, battery, waffle, violin), each failing at micro scale, each with a better in-catalog replacement
032016 — nowA React Component Library, for a Decade
Started in November 2016. The team has been evolving it ever since — through framework upgrades, build-tool migrations, design-system rewrites, and team turnover.
03
2016 — now
A React Component Library, for a Decade
Started in November 2016. The team has been evolving it ever since — through framework upgrades, build-tool migrations, design-system rewrites, and team turnover.
- A 12-month PDF viewer rewrite, still landing in pieces — animations, micro-interactions, vertical-scroll mode
- A cross-stack image-loading rewrite — backend, library and app, moving from a custom React loader to native, DPR-aware URLs
- A hand-rolled AST codemod for a button-component migration, touching the call-sites the migration needed
- Storybook upgrades, a Webpack 4 → Vite POC, type-definition cleanup
- Storybook hygiene, lint conventions, the small things a long-lived library needs
042018 — 2026Performance & Platform
Bandwidth, FPS, bundle-size — slow-cooked wins across four years and three repositories, shipped by the platform team.
04
2018 — 2026
Performance & Platform
Bandwidth, FPS, bundle-size — slow-cooked wins across four years and three repositories, shipped by the platform team.
- Native browser image loading with DPR-aware URLs — bandwidth down, layout shift down, complexity down
- react-scan integration in the debugger; an FPS meter; lazy header sliders; Brotli for static assets
- An esbuild bundler POC; a Puppeteer-based PDF renderer, parallelised and qpdf-compressed
- Engagement-tracking beacon for the lighter-weight surfaces
052017 — 2026Build Tooling & Force Multipliers
The work that does not show up in feature flags but shows up in how fast every other engineer on the team ships.
05
2017 — 2026
Build Tooling & Force Multipliers
The work that does not show up in feature flags but shows up in how fast every other engineer on the team ships.
- A hand-rolled AST codemod for a long-lived button migration — same tool, hundreds of call-sites
- The @ganapativs/* scope on npm — eslint-config-react, eslint-config-react-ts, babel-preset-react, used as team defaults
- Cursor and Claude Code dev-tooling rules codifying review and AI-pairing conventions for the team
062015 — 2024Mobile & Cross-Platform
From the original React Native app in 2015, to a public Chrome Web Store extension nine years later.
06
2015 — 2024
Mobile & Cross-Platform
From the original React Native app in 2015, to a public Chrome Web Store extension nine years later.
- Helped architect and ship the cross-platform iOS + Android app on React Native + Redux
- Years later: a full React Native upgrade, plus the iOS app-site-association work
- A Chrome + Firefox extension build pipeline for the product
- Priority Browser Extension — a small productivity utility, live on Chrome Web Store and Firefox since May 2024
072019 — 2025Data Ingest & PDF Tooling
Data pipelines and the document-processing primitives sitting underneath them — built with the data team.
07
2019 — 2025
Data Ingest & PDF Tooling
Data pipelines and the document-processing primitives sitting underneath them — built with the data team.
- A regulatory data-ingestion pipeline — Kafka consumers, resilient fetch orchestration, scheduling
- XBRL parsing for structured financial filings
- Hardened network-egress infrastructure for backend services
- puppeteer-warc — public OSS, captures Web ARChive (WARC) of pages
- PDFium and PDF-tooling sandboxes that later fed the production PDF viewer rewrite
Flagship open source
2026@microcharts/react106 word-sized chart types for React. Zero dependencies, ~1–7 kB gzip each, accessible by default, RSC-safe. — live: microcharts.devv0.8.0 · 106 charts2016bttn.cssA CSS button library — Product Hunt feature in 2016, still in people's projects today. — live: bttn.surge.sh2,052 ★2019react-spectrumGenerate colourful text placeholders, from any string. — live: react-spectrum.netlify.app318 ★2018react-dynamic-importDynamic imports for React with hooks. Suspense-ready.28 ★2019react-delightful-scrollerVirtualised infinite scroll. Subject of the TinyConf 2 talk.24 ★2024priority-browser-extensionA productivity new-tab utility, live in the Chrome Web Store and Firefox add-on store.3 ★2017pure-cacheTiny, pure JavaScript caching utility.11 ★2025puppeteer-warcWeb ARChive (WARC) capture utility on top of Puppeteer.5 ★2025rust-learning-planNotes from learning Rust, published openly. — live: ganapativs.github.io/rust-learning-planlearning
The rest of the catalogue
SGB
personal data-generation workbench (TS + Next.js) — live at sgb.vercel.app, four years of iteration
@ganapativs/eslint-config-react
shared eslint config
@ganapativs/eslint-config-react-ts
eslint config for TS
@ganapativs/babel-preset-react
babel preset
— all 55 original repos at github.com/ganapativs.