Matt Van Horn

icon indicating a website link mattvh.com

icon location Co-founded June ("self-driving oven" acquired by Weber) & the co that became Lyft. Building again, more soon. Vibe coding Last30Days research tool

Results 371 comments of Matt Van Horn

Source classes are not detected correctly when specified as `data-loading="addClass(opacity-50)"`

I've submitted a fix for this in PR #19775. Adds parentheses as candidate boundary characters in the Rust extractor, so class names inside `addClass(opacity-50)` patterns are now extracted.

<Preview> only fills whitespace to 150 chars while Gmail shows up to 200 chars.

Implemented in https://github.com/resend/react-email/pull/3100 - bumps PREVIEW_MAX_LENGTH from 150 to 200 to match Gmail's preview window.

forecast_with_covariates() may have the problem of test data leakage

Implemented in https://github.com/google-research/timesfm/pull/393 - fits independent ridge regressions per input instead of one across the whole batch, so temporal ordering between batch items no longer leaks.

feat: add GitHub Copilot workspace instructions

@RPainter8West good point on the coexistence angle. The reason I put this at `.github/copilot-instructions.md` is that it's the canonical path GitHub Copilot auto-loads across Copilot CLI, Copilot Chat, and Copilot...

research-lookup: invalid YAML frontmatter — unquoted 'Note:' breaks description parsing (introduced in PR #149)

Submitted in https://github.com/K-Dense-AI/scientific-agent-skills/pull/164 - quotes the description scalar so the Note: clause from PR #149 stops breaking YAML frontmatter parsing.

Function to launch browser with a pre-existent playwright context

Submitted in https://github.com/CloakHQ/CloakBrowser/pull/255 - exports build_launch_options() so an existing sync_playwright instance can pull in the stealth args without copying the body of launch().

Engine writes data/ to caller's cwd — pollutes user repos when started from project root

Implemented in https://github.com/rohitg00/agentmemory/pull/314 — adds `--data-dir` and `AGENTMEMORY_DATA_DIR`, default to platform-appropriate user dir (`~/Library/Application Support/agentmemory` on macOS, `$XDG_DATA_HOME/agentmemory` on Linux).

Support querying commands.dev with a url param

Implemented in https://github.com/warpdotdev/commands.dev/pull/79 - adds `?query=` URL parameter support for shareable search links.

Misc. bug: Inconsistent build flags across docker images

Implemented in https://github.com/ggml-org/llama.cpp/pull/23363.

Migration 0.4.41 → 0.4.50 silently drops provider connections from db.json

Submitted in https://github.com/decolua/9router/pull/1217 - asserts `providerConnections` row count post-insert and lets the surrounding transaction roll back on mismatch so `db.json` stays intact.