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---
name: pr-report
description: >
Review a pull request or contribution deeply, explain it tutorial-style for a
maintainer, and produce a polished report artifact such as HTML or Markdown.
Use when asked to analyze a PR, explain a contributor's design decisions,
compare it with similar systems, or prepare a merge recommendation.
---
# PR Report Skill
Produce a maintainer-grade review of a PR, branch, or large contribution.
Default posture:
- understand the change before judging it
- explain the system as built, not just the diff
- separate architectural problems from product-scope objections
- make a concrete recommendation, not a vague impression
## When to Use
Use this skill when the user asks for things like:
- "review this PR deeply"
- "explain this contribution to me"
- "make me a report or webpage for this PR"
- "compare this design to similar systems"
- "should I merge this?"
## Outputs
Common outputs:
- standalone HTML report in `tmp/reports/...`
- Markdown report in `report/` or another requested folder
- short maintainer summary in chat
If the user asks for a webpage, build a polished standalone HTML artifact with
clear sections and readable visual hierarchy.
Resources bundled with this skill:
- `references/style-guide.md` for visual direction and report presentation rules
- `assets/html-report-starter.html` for a reusable standalone HTML/CSS starter
## Workflow
### 1. Acquire and frame the target
Work from local code when possible, not just the GitHub PR page.
Gather:
- target branch or worktree
- diff size and changed subsystems
- relevant repo docs, specs, and invariants
- contributor intent if it is documented in PR text or design docs
Start by answering: what is this change *trying* to become?
### 2. Build a mental model of the system
Do not stop at file-by-file notes. Reconstruct the design:
- what new runtime or contract exists
- which layers changed: db, shared types, server, UI, CLI, docs
- lifecycle: install, startup, execution, UI, failure, disablement
- trust boundary: what code runs where, under what authority
For large contributions, include a tutorial-style section that teaches the
system from first principles.
### 3. Review like a maintainer
Findings come first. Order by severity.
Prioritize:
- behavioral regressions
- trust or security gaps
- misleading abstractions
- lifecycle and operational risks
- coupling that will be hard to unwind
- missing tests or unverifiable claims
Always cite concrete file references when possible.
### 4. Distinguish the objection type
Be explicit about whether a concern is:
- product direction
- architecture
- implementation quality
- rollout strategy
- documentation honesty
Do not hide an architectural objection inside a scope objection.
### 5. Compare to external precedents when needed
If the contribution introduces a framework or platform concept, compare it to
similar open-source systems.
When comparing:
- prefer official docs or source
- focus on extension boundaries, context passing, trust model, and UI ownership
- extract lessons, not just similarities
Good comparison questions:
- Who owns lifecycle?
- Who owns UI composition?
- Is context explicit or ambient?
- Are plugins trusted code or sandboxed code?
- Are extension points named and typed?
### 6. Make the recommendation actionable
Do not stop at "merge" or "do not merge."
Choose one:
- merge as-is
- merge after specific redesign
- salvage specific pieces
- keep as design research
If rejecting or narrowing, say what should be kept.
Useful recommendation buckets:
- keep the protocol/type model
- redesign the UI boundary
- narrow the initial surface area
- defer third-party execution
- ship a host-owned extension-point model first
### 7. Build the artifact
Suggested report structure:
1. Executive summary
2. What the PR actually adds
3. Tutorial: how the system works
4. Strengths
5. Main findings
6. Comparisons
7. Recommendation
For HTML reports:
- use intentional typography and color
- make navigation easy for long reports
- favor strong section headings and small reference labels
- avoid generic dashboard styling
Before building from scratch, read `references/style-guide.md`.
If a fast polished starter is helpful, begin from `assets/html-report-starter.html`
and replace the placeholder content with the actual report.
### 8. Verify before handoff
Check:
- artifact path exists
- findings still match the actual code
- any requested forbidden strings are absent from generated output
- if tests were not run, say so explicitly
## Review Heuristics
### Plugin and platform work
Watch closely for:
- docs claiming sandboxing while runtime executes trusted host processes
- module-global state used to smuggle React context
- hidden dependence on render order
- plugins reaching into host internals instead of using explicit APIs
- "capabilities" that are really policy labels on top of fully trusted code
### Good signs
- typed contracts shared across layers
- explicit extension points
- host-owned lifecycle
- honest trust model
- narrow first rollout with room to grow
## Final Response
In chat, summarize:
- where the report is
- your overall call
- the top one or two reasons
- whether verification or tests were skipped
Keep the chat summary shorter than the report itself.

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>PR Report Starter</title>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link
href="https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Newsreader:opsz,wght@6..72,500;6..72,700&display=swap"
rel="stylesheet"
/>
<style>
:root {
--bg: #f4efe5;
--paper: rgba(255, 251, 244, 0.88);
--paper-strong: #fffaf1;
--ink: #1f1b17;
--muted: #6a6257;
--line: rgba(31, 27, 23, 0.12);
--accent: #9c4729;
--accent-soft: rgba(156, 71, 41, 0.1);
--good: #2f6a42;
--warn: #946200;
--bad: #8c2f25;
--shadow: 0 22px 60px rgba(52, 37, 19, 0.1);
--radius: 20px;
}
* {
box-sizing: border-box;
}
html {
scroll-behavior: smooth;
}
body {
margin: 0;
color: var(--ink);
font-family: "IBM Plex Sans", sans-serif;
background:
radial-gradient(circle at top left, rgba(156, 71, 41, 0.12), transparent 34rem),
radial-gradient(circle at top right, rgba(47, 106, 66, 0.08), transparent 28rem),
linear-gradient(180deg, #efe6d6 0%, var(--bg) 48%, #ece5d8 100%);
}
.shell {
width: min(1360px, calc(100vw - 32px));
margin: 24px auto;
display: grid;
grid-template-columns: 280px minmax(0, 1fr);
gap: 24px;
}
.panel {
background: var(--paper);
backdrop-filter: blur(12px);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
}
.nav {
position: sticky;
top: 20px;
align-self: start;
padding: 22px;
}
.eyebrow {
letter-spacing: 0.12em;
text-transform: uppercase;
font-size: 11px;
font-weight: 700;
color: var(--accent);
}
.nav h1,
.hero h1,
h2,
h3 {
font-family: "Newsreader", serif;
line-height: 0.96;
margin: 0;
}
.nav h1 {
font-size: 2rem;
margin-top: 10px;
}
.nav p {
color: var(--muted);
font-size: 0.95rem;
line-height: 1.5;
}
.nav ul {
list-style: none;
padding: 0;
margin: 18px 0 0;
display: grid;
gap: 10px;
}
.nav a {
display: block;
color: var(--ink);
text-decoration: none;
padding: 10px 12px;
border-radius: 12px;
border: 1px solid transparent;
background: rgba(255, 255, 255, 0.35);
}
.nav a:hover {
border-color: var(--line);
background: rgba(255, 255, 255, 0.75);
}
.meta-block {
margin-top: 20px;
padding-top: 18px;
border-top: 1px solid var(--line);
color: var(--muted);
font-size: 0.86rem;
line-height: 1.5;
}
main {
display: grid;
gap: 24px;
}
section {
padding: 26px 28px 28px;
}
.hero {
padding: 28px;
overflow: hidden;
position: relative;
}
.hero::after {
content: "";
position: absolute;
inset: auto -3rem -6rem auto;
width: 18rem;
height: 18rem;
border-radius: 50%;
background: radial-gradient(circle, rgba(156, 71, 41, 0.14), transparent 68%);
pointer-events: none;
}
.hero h1 {
font-size: clamp(2.6rem, 5vw, 4.6rem);
max-width: 12ch;
margin-top: 12px;
}
.lede {
margin-top: 16px;
max-width: 70ch;
font-size: 1.05rem;
line-height: 1.65;
color: #2b2723;
}
.hero-grid,
.card-grid,
.two-col {
display: grid;
gap: 14px;
}
.hero-grid {
margin-top: 24px;
grid-template-columns: repeat(4, minmax(0, 1fr));
}
.card-grid {
grid-template-columns: repeat(2, minmax(0, 1fr));
}
.two-col {
grid-template-columns: repeat(2, minmax(0, 1fr));
}
.metric,
.card,
.finding {
padding: 18px;
background: rgba(255, 255, 255, 0.68);
border: 1px solid var(--line);
border-radius: 18px;
}
.metric .label {
color: var(--muted);
font-size: 0.82rem;
text-transform: uppercase;
letter-spacing: 0.08em;
}
.metric .value {
margin-top: 8px;
font-size: 1.45rem;
font-weight: 700;
}
h2 {
font-size: 2rem;
margin-bottom: 16px;
}
h3 {
font-size: 1.3rem;
margin-bottom: 10px;
}
p {
margin: 0 0 14px;
line-height: 1.65;
}
ul,
ol {
margin: 0;
padding-left: 20px;
line-height: 1.65;
}
li + li {
margin-top: 8px;
}
.badge-row {
display: flex;
flex-wrap: wrap;
gap: 8px;
margin: 18px 0 8px;
}
.badge {
display: inline-flex;
align-items: center;
gap: 8px;
padding: 8px 10px;
border-radius: 999px;
font-size: 0.82rem;
font-weight: 700;
border: 1px solid var(--line);
background: rgba(255, 255, 255, 0.68);
}
.badge.good {
color: var(--good);
}
.badge.warn {
color: var(--warn);
}
.badge.bad {
color: var(--bad);
}
.quote {
margin-top: 18px;
padding: 18px;
border-left: 4px solid var(--accent);
border-radius: 14px;
background: var(--accent-soft);
}
.severity {
display: inline-flex;
margin-bottom: 12px;
padding: 6px 10px;
border-radius: 999px;
font-size: 0.78rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.08em;
}
.severity.high {
background: rgba(140, 47, 37, 0.12);
color: var(--bad);
}
.severity.medium {
background: rgba(148, 98, 0, 0.12);
color: var(--warn);
}
.severity.low {
background: rgba(47, 106, 66, 0.12);
color: var(--good);
}
.ref {
color: var(--muted);
font-size: 0.82rem;
line-height: 1.5;
}
@media (max-width: 980px) {
.shell {
grid-template-columns: 1fr;
}
.nav {
position: static;
}
.hero-grid,
.card-grid,
.two-col {
grid-template-columns: 1fr;
}
.hero h1 {
max-width: 100%;
}
}
</style>
</head>
<body>
<div class="shell">
<aside class="panel nav">
<div class="eyebrow">Maintainer Report</div>
<h1>Report Title</h1>
<p>Replace this with a concise description of what the report covers.</p>
<ul>
<li><a href="#summary">Summary</a></li>
<li><a href="#tutorial">Tutorial</a></li>
<li><a href="#findings">Findings</a></li>
<li><a href="#recommendation">Recommendation</a></li>
</ul>
<div class="meta-block">
Replace with project metadata, review date, or scope notes.
</div>
</aside>
<main>
<section class="panel hero" id="summary">
<div class="eyebrow">Executive Summary</div>
<h1>Use the hero for the clearest one-line judgment.</h1>
<p class="lede">
Replace this with the short explanation of what the contribution does, why it matters,
and what the core maintainer question is.
</p>
<div class="badge-row">
<span class="badge good">Strength</span>
<span class="badge warn">Tradeoff</span>
<span class="badge bad">Risk</span>
</div>
<div class="hero-grid">
<div class="metric">
<div class="label">Overall Call</div>
<div class="value">Placeholder</div>
</div>
<div class="metric">
<div class="label">Main Concern</div>
<div class="value">Placeholder</div>
</div>
<div class="metric">
<div class="label">Best Part</div>
<div class="value">Placeholder</div>
</div>
<div class="metric">
<div class="label">Weakest Part</div>
<div class="value">Placeholder</div>
</div>
</div>
<div class="quote">
Use this block for the thesis, a sharp takeaway, or a key cited point.
</div>
</section>
<section class="panel" id="tutorial">
<h2>Tutorial Section</h2>
<div class="two-col">
<div class="card">
<h3>Concept Card</h3>
<p>Use cards for mental models, subsystems, or comparison slices.</p>
<div class="ref">path/to/file.ts:10</div>
</div>
<div class="card">
<h3>Second Card</h3>
<p>Keep cards fairly dense. This template is about style, not fixed structure.</p>
<div class="ref">path/to/file.ts:20</div>
</div>
</div>
</section>
<section class="panel" id="findings">
<h2>Findings</h2>
<article class="finding">
<div class="severity high">High</div>
<h3>Finding Title</h3>
<p>Use findings for the sharpest judgment calls and risks.</p>
<div class="ref">path/to/file.ts:30</div>
</article>
</section>
<section class="panel" id="recommendation">
<h2>Recommendation</h2>
<div class="card-grid">
<div class="card">
<h3>Path Forward</h3>
<p>Use this area for merge guidance, salvage plan, or rollout advice.</p>
</div>
<div class="card">
<h3>What To Keep</h3>
<p>Call out the parts worth preserving even if the whole proposal should not land.</p>
</div>
</div>
</section>
</main>
</div>
</body>
</html>

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# PR Report Style Guide
Use this guide when the user wants a report artifact, especially a webpage.
## Goal
Make the report feel like an editorial review, not an internal admin dashboard.
The page should make a long technical argument easy to scan without looking
generic or overdesigned.
## Visual Direction
Preferred tone:
- editorial
- warm
- serious
- high-contrast
- handcrafted, not corporate SaaS
Avoid:
- default app-shell layouts
- purple gradients on white
- generic card dashboards
- cramped pages with weak hierarchy
- novelty fonts that hurt readability
## Typography
Recommended pattern:
- one expressive serif or display face for major headings
- one sturdy sans-serif for body copy and UI labels
Good combinations:
- Newsreader + IBM Plex Sans
- Source Serif 4 + Instrument Sans
- Fraunces + Public Sans
- Libre Baskerville + Work Sans
Rules:
- headings should feel deliberate and large
- body copy should stay comfortable for long reading
- reference labels and badges should use smaller dense sans text
## Layout
Recommended structure:
- a sticky side or top navigation for long reports
- one strong hero summary at the top
- panel or paper-like sections for each major topic
- multi-column card grids for comparisons and strengths
- single-column body text for findings and recommendations
Use generous spacing. Long-form technical reports need breathing room.
## Color
Prefer muted paper-like backgrounds with one warm accent and one cool counterweight.
Suggested token categories:
- `--bg`
- `--paper`
- `--ink`
- `--muted`
- `--line`
- `--accent`
- `--good`
- `--warn`
- `--bad`
The accent should highlight navigation, badges, and important labels. Do not
let accent colors dominate body text.
## Useful UI Elements
Include small reusable styles for:
- summary metrics
- badges
- quotes or callouts
- finding cards
- severity labels
- reference labels
- comparison cards
- responsive two-column sections
## Motion
Keep motion restrained.
Good:
- soft fade/slide-in on first load
- hover response on nav items or cards
Bad:
- constant animation
- floating blobs
- decorative motion with no reading benefit
## Content Presentation
Even when the user wants design polish, clarity stays primary.
Good structure for long reports:
1. executive summary
2. what changed
3. tutorial explanation
4. strengths
5. findings
6. comparisons
7. recommendation
The exact headings can change. The important thing is to separate explanation
from judgment.
## References
Reference labels should be visually quiet but easy to spot.
Good pattern:
- small muted text
- monospace or compact sans
- keep them close to the paragraph they support
## Starter Usage
If you need a fast polished base, start from:
- `assets/html-report-starter.html`
Customize:
- fonts
- color tokens
- hero copy
- section ordering
- card density
Do not preserve the placeholder sections if they do not fit the actual report.