Hey, I'm Matt Van Horn

Co-founded June ("self-driving oven," acquired by Weber) and the company that became Lyft. Building again, more soon. Vibe coding the last30days research tool.

Building

• last30days - AI agent skill that researches any topic across Reddit, X, YouTube, HN, Polymarket, and the web.

Contributing to

• Python - Defaultdict repr infinite recursion, man page -X option text wrapping
• OpenCV - HoughCircles Python return type, YAML parser heap-overflow, reprojection error RMSE calculation
• Vercel Agent Browser - Appium v3 vendor prefix, chrome:// target filtering, WebSocket fallback, batch command workflows (#5 human contributor)
• OpenClaw - Browser relay, rate limit UX, iMessage delivery, Codex sandbox detection, voice calls, Telegram group prefix normalization
• Zed Code Editor - $ZED_LANGUAGE task variable, Reveal in Finder tab context menu, git panel starts_open setting, code_actions_on_format revert fix
• Homebrew - Sorbet typed: strict for cask artifact files, shell completions DSL artifact, Rosetta 2 caveats on Intel machines, bundle --describe flag, npm bundle extension
• ByteDance's OpenViking - Agent space name hashing, MCP stdio contention detection, async memory extraction, semantic summary filtering, non-dict LLM response handling, filename preservation, retrieval quality observer, auto-recall timeout prevention, cold-storage archival, MCP api_key support, VLM max_tokens, Whisper ASR integration, reindex command, PDF bookmark resolution, Prometheus metrics, memory health API, litellm rerank provider, provenance metadata, diagnostic command (tied for #5 human contributor)
• Paperclip - SPA routing, FK cascade, agent wake-on-status, CLI hints, plugin domain events, .env fallback, promptfoo eval framework, project filter, inline image embedding, AGENTS.md graceful fallback (#4 human contributor)
• PostHog - Non-retryable error matching refinement for data warehouse
• Super Productivity - Deadline support for sort, group, and filter in task view
• Lightpanda Browser - AXValue integer serialization per CDP spec, charset prescan detection, window.event property, Target.detachedFromTarget event dispatch, waitForSelector MCP tool, page state return from MCP actions
• Planning with Files - Analytics workflow template
• Keploy - JUnit XML output format
• Edict - Gongbu/bingbu SOUL.md duty assignment correction, dashboard auto-archiving prevention
• Embox - itoa() test coverage
• Kilo-Org Kilocode - Git config flags for Windows snapshot cleanup
• VS Code Front Matter - Dot-prefixed folder hiding in media panel
• SurfSense - Development console.log gating, empty catch block error logging, nested interactive element separation
• prek - VCS permalink and illegal Windows filename builtin hooks
• Vercel AI SDK - xAI provider model list GA updates
• photoview - Configurable media probing timeout via environment variable
• stdlib - Unused ESLint directive removal
• Superpowers - Session-start hook platform deduplication (tied for #7 human contributor)
• GitPython - GitDB large commit performance warning
• RTK - gh pr view --comments passthrough, compact_diff skipping for flag-only args
• go-git - core.hooksPath config field
• bat - Change marker preservation with --diff + --plain, consistent .deb MUSL package naming
• Mem0 - AzureOpenAI structured LLM response parsing
• Astral's Ruff - Comment-import blank line preservation, extend-ignore/select configuration
• Compound Engineering - Plan gating, serial review mode, hook safety, config merging, skills migration, NTFS colon handling, agent namespace resolution, ralph-wiggum reference updates, Codex delegation mode (#3 human contributor)
• GitHub Spec Kit - PowerShell positional parameter binding, specify/plan hook lifecycle wiring, speckit-utils community catalog
• Ladybird Browser - MouseButton::None handling in button code mapping
• dagu - HTTP response format string config option
• Coinbase x402 - Facilitator error message scheme inclusion, stale TODO cleanup
• Upstash Context7 - Command injection surface removal, enterprise MITM proxy certificate support
• UniversalMediaServer - Docker image JRE optimization
• moeru-ai/airi - Scoop installer decompression, provider config placeholder resolution, Scoop manifest v0.9.0 update
• ByteDance's Deer Flow - WebGL context graceful fallback, Cmd+K command palette and keyboard shortcuts, token usage per conversation turn
• SGLang - DSA/NSA attention backend support matrix, Qwen3-Reranker chat-template support
• Biome - ConfigurationOutsideProject diagnostic, organizeImports fixAll code action filtering
• Automattic's Harper - Grammar rule: "as evident by" correction, indefinite article logic extraction
• Resend React Email - Fragment element data-source prop filtering, peer dependency caret ranges
• Topgrade - TOPGRADE_YES and TOPGRADE_CLEANUP env vars, getnf step integration, --no-self-update deprecation
• Stripe AI - MCP client name proxy in local stdio server User-Agent, optional parameter nullable values
• Hugging Face Transformers - QA pipeline decode_spans boundary check
• Shopware - isEmpty method for Collection
• pygame-ce - Scrap module autopgmodule integration
• Manaflow cmux - Tab name in close confirmation dialog
• learnhouse - Backend logging standardization
• Humanizer - MIT license, SKILL.md cleanup, hyphenated word pair overuse pattern (#2 human contributor)
• git-machete - Root branch messaging clarity
• QMD - --no-rerank query option
• AgentScope CoPaw - DingTalk rich text empty block handling, Windows shell stderr suppression, reasoning_content sequential injection, cron CancelledError status reporting, async token usage lock
• alphaclaw - Watchdog test notification endpoint
• Reddit Devvit - XML preamble icons, hSetNX Redis transactions, path separator normalization (tied for #5 human contributor)
• Microsoft Playwright - Line reporter retry mislabeling
• Microsoft Agent Governance Toolkit - Markdown link checker CI workflow, Helm chart values, pytest markers
• npm CLI - Prefer-offline and prefer-online mutual exclusivity
• LangChain - PIL image fd leak in OpenAI token counting
• Continue - CLI install script portability, DeepSeek Reasoner reasoning_content field, Python indentation preservation, .continue/checks/ discovery
• NVIDIA Nemotron - Recipes, cookbooks, and examples organization
• Entire CLI - Rewind path resolution, mise version detection, bare-repo worktree layout, hk hook manager detection, OpenCode transcript filtering, system-reminder message handling
• Redocly CLI - OAS 3.1 number range constraint rule
• ElevenLabs MCP - Resource path resolution security hardening, eu/in API residency shorthand aliases
• Open Food Network - Webhook payload order number, inline error styling
• Ghostfolio - Storybook Symbol Autocomplete component, OnDestroy lifecycle elimination
• Accomplish - Russian and French language support, OpenAI custom base URL endpoint filtering, workspace knowledge notes, window reference stability
• Skyrim Community Shaders - Feature category name centralization
• Cactoos - PaddedEnd text decorator
• Vercel Emulate - Programmatic API, Resend service, Slack service emulators
• hummingbird - Queue panel maximum width increase
• av - av.db corruption error message improvement
• FreshClaude - Tab-switch shortcut propagation, Monaco editor theme syncing
• Hister - Full end-date inclusion in date range search
• OpenBrand - Extraction error messaging
• HawkDoc - Table block support via @lexical/table
• Parallel - Shell completion for bash, zsh, and fish
• Kilroy - Circuit breaker, prompt loading, heartbeat events, CLI tooling
• CascadeFlow - Trace export and offline cascade simulation
• CEOS - EOS longitudinal health tracking
• Metal3 Baremetal Operator - vbmctl unit test CI workflow coverage
• Meilisearch PHP - Federated search distinct parameter support
• Boeing Config File Validator - --file-types flag for targeted config file validation
• GraphQL Hive Console - Skeleton loader for access token loading states
• Cedar - Dry-run upgrade output messaging

OpenClaw Skills

• Search X - Real-time X/Twitter search powered by Grok
• Polymarket - Query and trade on prediction markets
• Parallel - High-accuracy web search via Parallel.ai
• Manus - Create autonomous AI tasks via Manus API
• Tesla - Control your Tesla vehicles
• xAI - Chat with Grok models via xAI API

Paperclip Plugins

• Discord - Bidirectional Discord integration: notifications, slash commands, and community intelligence
• Slack - Slack notifications for issue creation, completion, and approval workflows
• Telegram - Bidirectional Telegram bot: push notifications, bot commands, inline approve/reject buttons
• ACP Runtime - Run Claude Code, Codex, and Gemini CLI from any chat platform via Agent Client Protocol

Last updated: 2026-03-25