feat: introduce archify skill for generating architecture diagrams

- Added a new Archify skill, enabling users to create polished architecture, workflow, sequence, data-flow, and lifecycle diagrams.
- Implemented comprehensive functionality including rendering, validation, and delivery of diagrams in various formats.
- Integrated a user-friendly command-line interface for generating and previewing diagrams.
- Developed supporting files including package.json, LICENSE, and SKILL.md for documentation and licensing.
- Added unit tests to ensure reliability and functionality of the new skill.

These changes enhance the application by providing a structured approach to visualizing system architecture and workflows, improving user experience and data representation.

.agents/skills/archify/test/adaptive-reader-layout.test.mjs

@@ -0,0 +1,86 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import {
+  DESKTOP_READABILITY_VIEWPORT,
+  DESKTOP_READER_DIAGRAM_WIDTH,
+  DESKTOP_READER_HORIZONTAL_CHROME,
+  DESKTOP_READER_MIN_WIDTH,
+  MIN_PROJECTED_NODE_TEXT_PX,
+  minimumReadableSourceTextPx,
+  projectedNodeTextPx,
+} from '../renderers/shared/desktop-readability.mjs';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const skillRoot = path.resolve(__dirname, '..');
+const template = fs.readFileSync(path.join(skillRoot, 'assets', 'template.html'), 'utf8');
+const skill = fs.readFileSync(path.join(skillRoot, 'SKILL.md'), 'utf8');
+const reader = template.slice(
+  template.indexOf('Adaptive Reader Shell'),
+  template.indexOf('Archify.view = (function ()'),
+);
+
+test('wide desktop diagrams use one height-budgeted reader shell instead of breakpoint jumps', () => {
+  assert.match(template, /max-width: var\(--archify-reader-width, 1440px\)/);
+  assert.doesNotMatch(template, /@media \(min-width: 1680px\)[\s\S]{0,180}\.container/);
+  assert.doesNotMatch(template, /@media \(min-width: 1920px\)[\s\S]{0,180}\.container/);
+  assert.match(reader, /var WIDE_RATIO = 1\.55/);
+  assert.match(reader, /var MAX_READER_WIDTH = 1920/);
+  assert.match(reader, /var availableSvgHeight = Math\.max\(1, window\.innerHeight - fixedHeight\)/);
+  assert.match(reader, /var desiredWidth = availableSvgHeight \* ratio \+ chrome\.diagramX/);
+  assert.match(reader, /html\.style\.setProperty\('--archify-reader-width', rounded \+ 'px'\)/);
+});
+
+test('desktop readability budget matches the minimum adaptive reader at 1440 by 900', () => {
+  assert.deepEqual(DESKTOP_READABILITY_VIEWPORT, { width: 1440, height: 900 });
+  assert.equal(DESKTOP_READER_MIN_WIDTH, 960);
+  assert.equal(DESKTOP_READER_HORIZONTAL_CHROME, 30);
+  assert.equal(DESKTOP_READER_DIAGRAM_WIDTH, 930);
+  assert.match(reader, new RegExp(`var MIN_READER_WIDTH = ${DESKTOP_READER_MIN_WIDTH}`));
+  assert.match(template, /html\[data-nav-stage-rail="true"\] body \{ padding-block: 0\.375rem; \}/);
+  assert.match(template, /@media \(min-width: 768px\) and \(max-height: 1100px\)[\s\S]*?\.diagram-container \{[\s\S]*?padding: 0\.875rem;[\s\S]*?padding-bottom: calc\(0\.875rem \+ var\(--archify-nav-reserve\)\);/);
+  assert.match(template, /@media \(min-width: 768px\) and \(max-height: 920px\)[\s\S]*?body \{ padding-block: 1\.25rem; \}/);
+  assert.match(template, /\.diagram-container \{[\s\S]*?border: 1px solid var\(--panel-border\)/);
+});
+
+test('desktop readability source floor is the inverse of the projected-size gate', () => {
+  const sourceFloor = minimumReadableSourceTextPx(1376);
+  assert.ok(Math.abs(sourceFloor - 8.87741935483871) < 1e-12);
+  assert.ok(Math.abs(projectedNodeTextPx(sourceFloor, 1376) - MIN_PROJECTED_NODE_TEXT_PX) < 1e-12);
+  assert.equal(minimumReadableSourceTextPx(DESKTOP_READER_DIAGRAM_WIDTH), MIN_PROJECTED_NODE_TEXT_PX);
+  assert.equal(minimumReadableSourceTextPx(700), MIN_PROJECTED_NODE_TEXT_PX);
+  assert.ok(Number.isNaN(minimumReadableSourceTextPx(0)));
+});
+
+test('adaptive width preserves canonical SVG geometry and yields to specialized viewer modes', () => {
+  assert.match(reader, /window\.innerWidth >= MIN_DESKTOP_WIDTH/);
+  assert.match(reader, /html\.getAttribute\('data-embed'\) !== 'true'/);
+  assert.match(reader, /html\.getAttribute\('data-present'\) !== 'true'/);
+  assert.match(reader, /window\.matchMedia\('print'\)\.matches/);
+  assert.doesNotMatch(reader, /svg\.setAttribute\(['"](?:viewBox|width|height)/);
+  assert.doesNotMatch(reader, /svg\.style\.(?:width|height)/);
+  assert.doesNotMatch(reader, /overflow\s*=\s*['"]hidden/);
+});
+
+test('reader remeasures real content and reduces width before allowing desktop page overflow', () => {
+  assert.match(reader, /document\.fonts\.ready\.then\(schedule\)/);
+  assert.match(reader, /new ResizeObserver\(schedule\)/);
+  assert.match(reader, /new MutationObserver\(schedule\)/);
+  assert.match(reader, /document\.documentElement\.scrollHeight/);
+  assert.match(reader, /lastWidth - overflow \* ratio - 4/);
+  assert.match(skill, /1440×900, 1600×1000, and 1920×1080/);
+  assert.match(skill, /2048×1320/);
+  assert.match(skill, /Generate one responsive artifact for laptops and external displays/);
+  assert.match(skill, /preserve the authored SVG\/viewBox, proportions, semantic geometry/);
+});
+
+test('reader exposes an explicit stable-dimensions contract for browser evidence', () => {
+  assert.match(reader, /function stableSnapshot\(\)/);
+  assert.match(reader, /function whenStable\(\)/);
+  assert.match(reader, /document\.fonts && document\.fonts\.ready/);
+  assert.match(reader, /Math\.ceil\(document\.body\.scrollHeight\)/);
+  assert.match(reader, /stableFrames >= 3/);
+  assert.match(reader, /whenStable: whenStable/);
+});