A mobile-first, AI-native pull request review interface. Paste a GitHub PR URL and get a structured briefing with swipeable concept cards instead of raw file-by-file diffs.
“Skim” a PR -> skim milk -> cow -> moo
demo.mov
For side projects in the vibe coding era, you want to double check the agents’ work but you’re not that concerned about syntax, line numbers, formatting, etc… Traditional review interfaces and IDEs are too heavy. The main things you want to know are
- Intent of change
- Changes to concepts and components in your code not individual lines
- Review according to the change narrative
- Paste a GitHub URL — enter a repo or PR link on the landing page
- Browse the queue — see open PRs with risk levels, line counts, and authors
- Read the briefing — AI summarizes the PR into key changes, intent, and stats
- Swipe through concepts — changes are grouped into narrative themes (e.g. “Auth Flow”, “DB Migration”)
- Drill into code — expand objects and members, view syntax-highlighted diffs with AI annotations
- Submit your review — Pasteurize (approve), Moo (comment), or Graze (request changes)
The AI analysis happens in two phases: each file is analyzed independently in parallel, then a synthesis step groups everything into concepts. Progress streams to the UI in real-time.
# Prerequisites
gh auth login # GitHub CLI must be authenticated
cp .env.example .env.local # then fill in your API key
# Install & run
pnpm install
pnpm dev
| Variable | Required | Default | Description |
|---|---|---|---|
OPENAI_API_KEY |
Yes | — | Your OpenAI (or compatible) API key |
OPENAI_MODEL |
No | gpt-5.2 |
Model to use for analysis |
OPENAI_BASE_URL |
No | (empty — uses OpenAI) | Base URL for OpenAI-compatible APIs (e.g. Ollama, Azure, Together) |
Open http://localhost:3000 and paste a GitHub PR URL.
There is no authentication or authorization built into Skim. Anyone who can reach the server can use your gh CLI session and OPENAI_API_KEY. If you deploy this beyond localhost, secure it yourself — put it behind a VPN, reverse proxy with auth, or add your own auth layer.
app/
page.tsx Landing page (URL input)
[owner]/[repo]/
page.tsx PR queue (server component)
[number]/page.tsx Review screen (client component)
api/prs/ API routes (list, detail, diff, analysis, review)
components/
SwipeView.tsx Touch carousel with dot indicators
BriefingCard.tsx PR summary, stats, intent, key changes
ConceptCard.tsx Themed file groups with expandable objects
CodeView.tsx Full-screen diff with AI annotations
FullDiffCard.tsx Complete file-by-file diff card
DiffTable.tsx Shared diff renderer with syntax highlighting
HighlightedCode.tsx Syntax token coloring
ReviewDropdown.tsx Pasteurize / Moo / Graze review actions
NavBar.tsx Sticky nav: logo → home, repo breadcrumb → queue
badges.tsx Risk, size, kind badges
lib/
ai.ts OpenAI integration (per-file + synthesis)
gh.ts GitHub CLI wrapper with input sanitization
diff-parser.ts Unified diff parser
syntax.ts Regex-based syntax tokenizer
parse-input.ts GitHub URL/input parser
types.ts TypeScript interfaces
public/
logo.png Cow head logo
MIT