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@Damovisa
Last active October 23, 2026 14:41
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GitHub Copilot extension — bug-squasher-canvas
{
"name": "bug-squasher-canvas",
"version": 1
}
import { readFile } from "node:fs/promises";
import { createServer } from "node:http";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { createCanvas, joinSession } from "@github/copilot-sdk/extension";
const directory = path.dirname(fileURLToPath(import.meta.url));
const htmlPath = path.join(directory, "index.html");
const servers = new Map();
async function startServer(instanceId) {
const html = await readFile(htmlPath);
const server = createServer((request, response) => {
if (request.method !== "GET" || new URL(request.url || "/", "http://127.0.0.1").pathname !== "/") {
response.writeHead(404, { "content-type": "text/plain; charset=utf-8" });
response.end("Not found");
return;
}
response.writeHead(200, {
"content-type": "text/html; charset=utf-8",
"cache-control": "no-store",
"content-length": html.length,
});
response.end(html);
});
await new Promise((resolve, reject) => {
server.once("error", reject);
server.listen(0, "127.0.0.1", resolve);
});
const address = server.address();
if (!address || typeof address === "string") {
await new Promise((resolve) => server.close(resolve));
throw new Error("Could not determine the canvas server address.");
}
return { server, url: `http://127.0.0.1:${address.port}/` };
}
await joinSession({
canvases: [
createCanvas({
id: "bug-squasher-canvas",
displayName: "Bug squasher",
description: "Interactive, zoomable diagram of the bug triage, reproduction, fix, and verification workflow.",
open: async (ctx) => {
let entry = servers.get(ctx.instanceId);
if (!entry) {
entry = await startServer(ctx.instanceId);
servers.set(ctx.instanceId, entry);
}
return {
title: "Bug squasher",
status: "Drag to pan · Scroll to zoom · Use Fit to reset",
url: entry.url,
};
},
onClose: async (ctx) => {
const entry = servers.get(ctx.instanceId);
if (!entry) return;
servers.delete(ctx.instanceId);
await new Promise((resolve, reject) => {
entry.server.close((error) => error ? reject(error) : resolve());
});
},
}),
],
});
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Your bug squasher</title>
<script>
(() => {
document.documentElement.setAttribute("data-theme", "light");
})();
</script>
<style>
:root {
color-scheme: light;
--cp-bg: #f7f4ef;
--cp-bg-elevated: #fcfbf8;
--cp-surface: #ffffff;
--cp-surface-soft: #f5f5f5;
--cp-border: #dedede;
--cp-border-strong: #919191;
--cp-text: #242424;
--cp-text-muted: #5c5c5c;
--cp-text-soft: #6f6f6f;
--cp-accent: #b11f4b;
--cp-accent-hover: #9a1a41;
--cp-accent-soft: rgba(177, 31, 75, 0.08);
--cp-accent-fg: #ffffff;
--cp-success: #16a34a;
--cp-danger: #dc2626;
--cp-warning: #f59e0b;
--cp-link: #0078d4;
--cp-shadow: 0 18px 48px rgba(0, 0, 0, 0.12);
--cp-overlay: rgba(255, 255, 255, 0.8);
--cp-panel: rgba(255, 255, 255, 0.86);
--cp-panel-strong: rgba(255, 255, 255, 0.96);
--cp-sheen: rgba(255, 255, 255, 0.55);
--cp-highlight: rgba(177, 31, 75, 0.12);
--cp-diagram-input: color-mix(in srgb, var(--cp-border-strong) 10%, var(--cp-surface));
--cp-diagram-plan: color-mix(in srgb, var(--cp-link) 8%, var(--cp-surface));
--cp-diagram-build: color-mix(in srgb, var(--cp-warning) 11%, var(--cp-surface));
--cp-diagram-evaluate: color-mix(in srgb, var(--cp-accent) 7%, var(--cp-surface));
--cp-diagram-support: color-mix(in srgb, var(--cp-warning) 6%, var(--cp-surface));
--cp-diagram-complete: color-mix(in srgb, var(--cp-success) 9%, var(--cp-surface));
--cp-diagram-success-text: color-mix(in srgb, var(--cp-success) 40%, var(--cp-text));
}
html[data-theme="dark"] {
color-scheme: dark;
--cp-bg: #3d3b3a;
--cp-bg-elevated: #343231;
--cp-surface: #292929;
--cp-surface-soft: #2e2e2e;
--cp-border: #474747;
--cp-border-strong: #5f5f5f;
--cp-text: #dedede;
--cp-text-muted: #919191;
--cp-text-soft: #b0b0b0;
--cp-accent: #fd8ea1;
--cp-accent-hover: #fb7b91;
--cp-accent-soft: rgba(253, 142, 161, 0.14);
--cp-accent-fg: #1a1a1a;
--cp-success: #4ade80;
--cp-danger: #f87171;
--cp-warning: #fbbf24;
--cp-link: #4da6ff;
--cp-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
--cp-overlay: rgba(41, 41, 41, 0.88);
--cp-panel: rgba(41, 41, 41, 0.72);
--cp-panel-strong: rgba(41, 41, 41, 0.96);
--cp-sheen: rgba(255, 255, 255, 0.04);
--cp-highlight: rgba(253, 142, 161, 0.12);
}
* { box-sizing: border-box; }
body {
margin: 0;
min-width: 320px;
height: 100vh;
overflow: hidden;
display: flex;
flex-direction: column;
background: var(--cp-bg);
color: var(--cp-text);
font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
}
.toolbar {
z-index: 1;
display: flex;
align-items: center;
gap: 0.5rem;
min-height: 58px;
padding: 0.65rem 1rem;
background: var(--cp-surface);
border-bottom: 1px solid var(--cp-border);
}
.toolbar h1 {
margin: 0 auto 0 0;
font-size: 1rem;
font-weight: 650;
}
.toolbar button {
min-width: 2.25rem;
height: 2.25rem;
padding: 0 0.7rem;
color: var(--cp-text);
background: var(--cp-surface);
border: 1px solid var(--cp-border);
border-radius: 0.625rem;
font: inherit;
cursor: pointer;
}
.toolbar button:hover {
border-color: var(--cp-border-strong);
background: var(--cp-surface-soft);
}
.zoom-level {
min-width: 3.5rem;
color: var(--cp-text-muted);
font-size: 0.875rem;
text-align: center;
font-variant-numeric: tabular-nums;
}
.hint {
padding: 0.45rem 1rem;
color: var(--cp-text-muted);
background: var(--cp-bg-elevated);
border-bottom: 1px solid var(--cp-border);
font-size: 0.8rem;
}
.viewport {
flex: 1;
min-height: 0;
overflow: hidden;
cursor: grab;
touch-action: none;
user-select: none;
}
.viewport.dragging { cursor: grabbing; }
svg {
display: block;
width: 100%;
height: 100%;
}
.section-label {
fill: var(--cp-text-muted);
font-size: 22px;
font-weight: 650;
letter-spacing: 0.02em;
}
.title {
fill: var(--cp-text);
font-size: 38px;
font-weight: 650;
}
.node {
fill: var(--cp-surface);
stroke: var(--cp-border-strong);
stroke-width: 2;
}
.node-title {
fill: var(--cp-text);
font-size: 23px;
font-weight: 600;
text-anchor: middle;
dominant-baseline: middle;
}
.node-subtitle {
fill: var(--cp-text-muted);
font-size: 15px;
text-anchor: middle;
dominant-baseline: middle;
}
.list-item {
fill: var(--cp-text);
font-size: 18px;
}
.flow {
fill: none;
stroke: var(--cp-text-muted);
stroke-width: 2.5;
stroke-linecap: round;
stroke-linejoin: round;
marker-end: url(#arrow);
}
.branch {
fill: none;
stroke: var(--cp-text-muted);
stroke-width: 2;
stroke-dasharray: 8 8;
stroke-linecap: round;
stroke-linejoin: round;
marker-end: url(#arrow);
}
.branch-line {
fill: none;
stroke: var(--cp-text-muted);
stroke-width: 2;
stroke-dasharray: 8 8;
stroke-linecap: round;
stroke-linejoin: round;
}
.note {
fill: var(--cp-text-muted);
font-size: 17px;
text-anchor: middle;
}
.done-mark {
fill: var(--cp-diagram-success-text);
font-size: 18px;
font-weight: 650;
}
.tabs {
display: flex;
gap: 4px;
padding: 4px 8px;
background: var(--cp-surface);
border-bottom: 1px solid var(--cp-border);
}
.tabs button {
padding: 6px 12px;
border: 1px solid var(--cp-border);
border-radius: 10px;
background: color-mix(in srgb, var(--cp-success) 10%, var(--cp-surface));
color: var(--cp-text-muted);
font: inherit;
font-size: 0.8125rem;
cursor: pointer;
}
.tabs button[aria-selected="true"] {
color: var(--cp-text);
background: color-mix(in srgb, var(--cp-success) 20%, var(--cp-surface));
border-color: var(--cp-success);
font-weight: 600;
}
button:focus-visible { outline: 2px solid var(--cp-accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.security-heading { fill: var(--cp-text); font-size: 24px; font-weight: 650; }
.security-copy { fill: var(--cp-text-muted); font-size: 20px; }
.security-small { fill: var(--cp-text-muted); font-size: 18px; }
.security-band { fill: var(--cp-surface-soft); }
.input-node { fill: var(--cp-diagram-input); }
.plan-node { fill: var(--cp-diagram-plan); }
.build-node { fill: var(--cp-diagram-build); }
.evaluate-node { fill: var(--cp-diagram-evaluate); }
.support-node { fill: var(--cp-diagram-support); }
.complete-node { fill: var(--cp-diagram-complete); }
.security-rule { stroke: var(--cp-border); stroke-width: 1; }
.security-number { fill: var(--cp-text-muted); font-size: 18px; }
.security-callout { fill: var(--cp-text); font-size: 19px; font-weight: 600; }
#security-panel .flow, #security-panel .branch { marker-end: url(#security-arrow); }
#poc-panel .flow, #poc-panel .branch { marker-end: url(#poc-arrow); }
.cycle-outline {
fill: var(--cp-surface);
stroke: var(--cp-border-strong);
stroke-width: 2;
}
.tabs { flex-wrap: wrap; }
@media (max-width: 600px) {
.toolbar { gap: 0.35rem; padding-inline: 0.6rem; }
.toolbar h1 { font-size: 0.9rem; }
.hint { padding-inline: 0.65rem; }
}
</style>
</head>
<body>
<header class="toolbar">
<h1 id="canvas-heading">Your bug squasher</h1>
<button id="zoom-out" type="button" aria-label="Zoom out" title="Zoom out">−</button>
<output id="zoom-level" class="zoom-level" aria-live="polite">100%</output>
<button id="zoom-in" type="button" aria-label="Zoom in" title="Zoom in">+</button>
<button id="fit" type="button" title="Fit the full diagram">Fit</button>
</header>
<nav class="tabs" role="tablist" aria-label="Team diagrams">
<button id="bug-tab" role="tab" aria-controls="bug-panel" aria-selected="true" type="button" data-diagram="bug">Bug squasher</button>
<button id="security-tab" role="tab" aria-controls="security-panel" aria-selected="false" tabindex="-1" type="button" data-diagram="security">Security</button>
<button id="poc-tab" role="tab" aria-controls="poc-panel" aria-selected="false" tabindex="-1" type="button" data-diagram="poc">POC spike</button>
</nav>
<div class="hint">Drag to pan · Scroll to zoom · Use Fit to reset</div>
<main id="viewport" class="viewport" aria-label="Interactive workflow diagrams">
<svg id="bug-panel" data-diagram="bug" viewBox="0 0 1760 820" role="tabpanel" aria-labelledby="bug-tab">
<title id="diagram-title">Your bug squasher</title>
<desc id="diagram-desc">Signals flow through triage, reproduction, fixing, and verification to completed work. Unreproducible issues route to incident response and attention coordination.</desc>
<defs>
<marker id="arrow" markerWidth="12" markerHeight="12" refX="10" refY="6" orient="auto" markerUnits="userSpaceOnUse">
<path d="M2 2 L10 6 L2 10" fill="none" stroke="var(--cp-text-muted)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</marker>
</defs>
<g id="world">
<text class="title" x="60" y="82">Your bug squasher</text>
<text class="section-label" x="60" y="168">Signals</text>
<text class="section-label" x="360" y="168">Agentic software delivery</text>
<text class="section-label" x="1400" y="168">Completed work</text>
<rect class="node input-node" x="60" y="205" width="250" height="210" rx="12"/>
<text class="list-item" x="88" y="246">Customer reports</text>
<text class="list-item" x="88" y="291">Production errors</text>
<text class="list-item" x="88" y="336">Failing builds</text>
<text class="list-item" x="88" y="381">Schedules</text>
<rect class="node plan-node" x="360" y="230" width="180" height="130" rx="12"/>
<text class="node-title" x="450" y="295">Triage</text>
<rect class="node plan-node" x="610" y="230" width="180" height="130" rx="12"/>
<text class="node-title" x="700" y="295">Reproducer</text>
<rect class="node build-node" x="860" y="230" width="180" height="130" rx="12"/>
<text class="node-title" x="950" y="278">Fixer</text>
<text class="node-subtitle" x="950" y="315">Copilot coding agent</text>
<rect class="node evaluate-node" x="1110" y="230" width="180" height="130" rx="12"/>
<text class="node-title" x="1200" y="295">Verifier</text>
<rect class="node complete-node" x="1400" y="205" width="300" height="210" rx="12"/>
<text class="done-mark" x="1430" y="252">✓ Bug fixed</text>
<text class="done-mark" x="1430" y="307">✓ Regression test added</text>
<text class="done-mark" x="1430" y="362">✓ Customer informed</text>
<path class="flow" d="M310 295 H350"/>
<path class="flow" d="M540 295 H600"/>
<path class="flow" d="M790 295 H850"/>
<path class="flow" d="M1040 295 H1100"/>
<path class="flow" d="M1290 295 H1390"/>
<path class="branch" d="M1200 370 V430 H950 V370"/>
<text class="note" x="1075" y="418">Retry if needed</text>
<path class="branch" d="M700 370 V505"/>
<text class="note" x="700" y="478">If the issue can't be reproduced</text>
<path class="branch-line" d="M700 505 H970"/>
<path class="branch" d="M700 505 V590"/>
<path class="branch" d="M970 505 V590"/>
<rect class="node support-node" x="570" y="600" width="260" height="110" rx="12"/>
<text class="node-title" x="700" y="655">Incident responder</text>
<rect class="node support-node" x="840" y="600" width="260" height="110" rx="12"/>
<text class="node-title" x="970" y="655">Attention coordinator</text>
</g>
</svg>
<svg id="security-panel" data-diagram="security" viewBox="0 0 1760 1360" role="tabpanel" aria-labelledby="security-tab" hidden>
<title>Your security</title>
<desc>Security signals pass through triage, remediation and verification to completion with proof. Specialists respond to secrets and guard posture. The attention coordinator routes urgency, and the policy coach proposes improvements for your approval.</desc>
<defs>
<marker id="security-arrow" markerWidth="12" markerHeight="12" refX="10" refY="6" orient="auto" markerUnits="userSpaceOnUse">
<path d="M2 2 L10 6 L2 10" fill="none" stroke="var(--cp-text-muted)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</marker>
</defs>
<g>
<text class="title" x="60" y="78">Your security</text>
<text class="security-copy" x="60" y="118">You set direction. Your team carries the work.</text>
<text class="section-label" x="60" y="176">Signals</text>
<rect class="node input-node" x="60" y="200" width="380" height="76" rx="12"/>
<rect class="node input-node" x="480" y="200" width="380" height="76" rx="12"/>
<rect class="node input-node" x="900" y="200" width="380" height="76" rx="12"/>
<rect class="node input-node" x="1320" y="200" width="380" height="76" rx="12"/>
<text class="node-title" x="250" y="238">Vulnerability alerts</text>
<text class="node-title" x="670" y="238">Secret alerts</text>
<text class="node-title" x="1090" y="238">Repo changes</text>
<text class="node-title" x="1510" y="238">Schedules</text>
<path class="branch-line" d="M250 286 V304 H1510 V286 M670 286 V304 M1090 286 V304"/>
<path class="flow" d="M880 304 V346"/>
<text class="section-label" x="60" y="342">The handoff</text>
<rect class="node plan-node" x="60" y="370" width="340" height="290" rx="12"/>
<text class="security-number" x="84" y="411">1</text>
<text class="security-heading" x="114" y="412">Triage</text>
<path class="security-rule" d="M60 432 H400"/>
<text class="security-copy" x="84" y="474">Does this affect us?</text>
<text class="security-small" x="84" y="516">Reachability · severity · owner</text>
<rect class="security-band complete-node" x="84" y="552" width="292" height="80" rx="10"/>
<text class="security-callout" x="102" y="582">No impact?</text>
<text class="security-small" x="102" y="610">Close with proof.</text>
<rect class="node build-node" x="490" y="370" width="340" height="290" rx="12"/>
<text class="security-number" x="514" y="411">2</text>
<text class="security-heading" x="544" y="412">Remediator</text>
<path class="security-rule" d="M490 432 H830"/>
<text class="security-copy" x="514" y="474">Prepare the fix.</text>
<text class="security-small" x="514" y="516">Autofix · Dependabot · agent</text>
<rect class="security-band" x="514" y="552" width="292" height="80" rx="10"/>
<text class="security-callout" x="532" y="599">Draft PR + tests</text>
<rect class="node evaluate-node" x="920" y="370" width="340" height="290" rx="12"/>
<text class="security-number" x="944" y="411">3</text>
<text class="security-heading" x="974" y="412">Verifier</text>
<path class="security-rule" d="M920 432 H1260"/>
<text class="security-copy" x="944" y="474">Did it work?</text>
<text class="security-small" x="944" y="516">Rescan after deploy.</text>
<rect class="security-band" x="944" y="552" width="292" height="80" rx="10"/>
<text class="security-callout" x="962" y="599">Close or retry.</text>
<rect class="node complete-node" x="1350" y="370" width="350" height="290" rx="12"/>
<text class="security-heading" x="1378" y="412">Done, with proof</text>
<path class="security-rule" d="M1350 432 H1700"/>
<text class="done-mark" x="1378" y="488">✓ Alert closed</text>
<text class="done-mark" x="1378" y="546">✓ Secret rotated</text>
<text class="done-mark" x="1378" y="604">✓ Settings restored</text>
<path class="flow" d="M410 515 H480"/>
<path class="flow" d="M840 515 H910"/>
<path class="flow" d="M1270 515 H1340"/>
<path class="branch" d="M1090 670 V700 H660 V670"/>
<text class="note" x="875" y="690">Retry</text>
<path class="branch-line" d="M230 670 V740 H1400 M660 710 V740 M1090 710 V740"/>
<path class="branch" d="M1400 740 V786"/>
<text class="note" x="1400" y="725">Needs your judgment</text>
<text class="section-label" x="60" y="786">Specialists</text>
<rect class="node support-node" x="60" y="810" width="440" height="220" rx="12"/>
<text class="security-number" x="84" y="851">4</text>
<text class="security-heading" x="114" y="852">Secret responder</text>
<text class="security-copy" x="84" y="901">Check → revoke if allowed → verify</text>
<rect class="security-band" x="84" y="948" width="392" height="52" rx="10"/>
<text class="security-callout" x="104" y="981">Urgent if still active</text>
<rect class="node support-node" x="540" y="810" width="440" height="220" rx="12"/>
<text class="security-number" x="564" y="851">5</text>
<text class="security-heading" x="594" y="852">Posture guard</text>
<text class="security-copy" x="564" y="901">Restore within policy.</text>
<text class="security-copy" x="564" y="945">Flag exceptions.</text>
<text class="security-copy" x="564" y="989">Log changes.</text>
<rect class="node support-node" x="1030" y="810" width="670" height="220" rx="12"/>
<text class="security-number" x="1054" y="851">6</text>
<text class="security-heading" x="1084" y="852">Attention coordinator</text>
<text class="security-small" x="1480" y="851">Your single contact</text>
<path class="security-rule" d="M1030 874 H1700"/>
<text class="security-small" x="1054" y="903">WHEN</text>
<text class="security-small" x="1230" y="903">EXAMPLE</text>
<text class="security-small" x="1570" y="903">DELIVERY</text>
<text class="security-callout" x="1054" y="931">Now</text>
<text class="security-small" x="1230" y="931">Live secret</text>
<text class="security-small" x="1570" y="931">Page</text>
<text class="security-callout" x="1054" y="958">Next break</text>
<text class="security-small" x="1230" y="958">Review a fix</text>
<text class="security-small" x="1570" y="958">Queue</text>
<text class="security-callout" x="1054" y="985">Digest</text>
<text class="security-small" x="1230" y="985">Work completed</text>
<text class="security-small" x="1570" y="985">Summary</text>
<text class="security-callout" x="1054" y="1012">Quiet</text>
<text class="security-small" x="1230" y="1012">Duplicates</text>
<text class="security-small" x="1570" y="1012">None</text>
<path class="branch-line" d="M280 1040 V1060 H1005 V920 M760 1040 V1060"/>
<path class="branch" d="M1005 920 H1020"/>
<rect class="node" x="60" y="1100" width="1640" height="200" rx="12"/>
<text class="section-label" x="84" y="1138">Improve together</text>
<text class="security-number" x="84" y="1173">7</text>
<text class="security-heading" x="114" y="1174">Policy coach</text>
<text class="security-copy" x="330" y="1174">Learn from past runs.</text>
<rect class="security-band plan-node" x="84" y="1202" width="330" height="66" rx="10"/>
<rect class="security-band evaluate-node" x="510" y="1202" width="330" height="66" rx="10"/>
<rect class="security-band support-node" x="936" y="1202" width="300" height="66" rx="10"/>
<rect class="security-band complete-node" x="1332" y="1202" width="340" height="66" rx="10"/>
<text class="node-title" x="249" y="1235">Suggest a rule</text>
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<text class="node-title" x="1086" y="1235">You approve</text>
<text class="node-title" x="1502" y="1235">Team applies</text>
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<title>POC spike</title>
<desc>A proposal issue enters an outlined iteration cycle: Plan, Build, Evaluate. Evaluation loops back to Plan when more work is needed, or exits to a completed feature when ready. Clarification sits outside the cycle and feeds into Plan before the next iteration.</desc>
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<text class="section-label" x="60" y="358">Signal</text>
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<path class="flow" d="M1000 455 H1060"/>
<path class="branch" d="M1185 530 V610 H565 V530"/>
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<rect class="node complete-node" x="1450" y="390" width="250" height="130" rx="12"/>
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<path class="flow" d="M1310 455 H1440"/>
<text class="note" x="1400" y="434">Ready</text>
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