feat: Interactive Canvas — Blueprint, Guided Tour, Corkboard & Stack Studio

.github/workflows/ci.yml

@@ -9,8 +9,8 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: '20'
           cache: 'npm'

.prettierignore

@@ -4,3 +4,4 @@ website
 package-lock.json
 *.min.js
 icons
+vendor

CHANGELOG.md

@@ -7,6 +7,18 @@ This project follows [Semantic Versioning](https://semver.org/) and groups chang
 by theme. Dates are when the release landed on `main` — 1.1.0 through 1.6.0 shipped
 the same day, as a rapid burst of improvements, so they share a date.
 
+## [3.1.0] — 2026-06-16 · _Interactive Canvas (Blueprint · Guided Tour · Corkboard · Stack Studio)_
+
+### Added
+
+- **Canvas tab (Blueprint).** A new **Canvas** tab in the Lenses group turns any repo's Deep Dive into an interactive, zoomable, pannable map of the repo's atoms — modules, subsystems, and their lineage — colour-coded by kind with a live node legend. Drag nodes to rearrange; positions persist across sessions.
+- **Guided Tour.** Spotlights the architecture node-by-node in dependency order with plain-English narration drawn from the Deep Dive. Navigate with **Back / Next**, auto-play, or keyboard **← → Esc**; fully reduced-motion safe.
+- **Export to `.excalidraw` and SVG.** Download the canvas as an `.excalidraw` file (opens hand-drawn in excalidraw.com, Obsidian, or VS Code) or as a clean SVG for docs and slides.
+- **Persistent arrangements.** Node positions and canvas state are stored in a new `scenes` IndexedDB store and round-trip through the library backup/export envelope, so layouts travel with your library.
+- **Corkboard (Library-wide canvas).** A toggle in the Library page switches your whole collection into a red-string board: every scanned repo is a draggable manila card, and related repos are joined by colored string keyed to relationship type (alternatives, synergies, head-to-heads, combined ideas) and shaded by fit score. Filter by Collection to focus a board, and the arrangement is saved so it's exactly where you left it next session. Reuses the same canvas engine as Blueprint — zero new dependencies, theme-aware, reduced-motion safe.
+- **Stack Studio (canvas view of a tech-stack).** The Tech-Stack Builder result gains a **View on canvas** toggle: the repos you wired together render as layer-coloured cards in adoption order, joined by their integrations, with any gaps shown as dashed cards — the same engine, turning "how these fit together" into a living diagram.
+- **Zero-build, zero dependencies.** Plain ES modules only — no bundler, no new npm packages. Theme-aware across all 13 themes and reduced-motion safe throughout.
+
 ## [3.0.1] — 2026-06-15 · _Audit hardening_
 
 A focused correctness, security, and tooling pass from a full code audit — no

README.md

@@ -37,6 +37,7 @@ A scan opens to a **verdict landing** and fans out into focused tabs:
 | 🔍 | **Discover** | Search GitHub from inside the extension, or get **recommendations** from the repos you've already adopted. |
 | 🕸️ | **Connections** | A walkable map centred on the current repo, showing how it relates to the others you've scanned. |
 | 🤝 | **Synergies** · **Versus** · **Combinator** | Complements, head-to-heads, and fused project ideas — grounded in *your* library. |
+| 🗺️ | **Canvas** | Turn a repo's Deep Dive into an interactive, draggable **Blueprint** — pan/zoom the architecture map, take a narrated **Guided Tour** in dependency order (keyboard-navigable, reduced-motion safe), and export to **.excalidraw** or SVG. Switch the Library into a **Corkboard** to map your whole collection at once: every scanned repo a draggable card, related repos joined by colored string (alternatives, synergies, head-to-heads, combined ideas), colored by fit, filterable by Collection, arrangement saved. And the Tech-Stack Builder renders its wiring on the same canvas as a **Stack Studio**. |
 
 Plus **SKTPG** (a one-tap State / Known-pitfalls / Trajectory / Proof / Growth read), framework lenses, and capability re-tagging.
 

backup.js

@@ -13,7 +13,7 @@ export const BACKUP_VERSION = 2;
 // Upper bounds on how much a single import may write, so a hostile or corrupt
 // file can't pin the IndexedDB write lock or blow the storage quota. Anything
 // past these is dropped with a surfaced warning (never silently).
-export const MAX_ROWS = { repos: 5000, nodes: 20000, edges: 50000, cache: 5000, collections: 2000, decisions: 5000, snapshots: 5000 };
+export const MAX_ROWS = { repos: 5000, nodes: 20000, edges: 50000, cache: 5000, collections: 2000, decisions: 5000, snapshots: 5000, scenes: 2000 };
 
 // Per-repo snapshot ring-buffer cap (mirrors SNAPSHOT_CAP in snapshots.js); each
 // imported snapshots row is trimmed to its most recent SNAP_CAP entries.
@@ -27,10 +27,11 @@ const cacheOk = (c) => !!(c && c.repoId && c.platform);
 const collectionOk = (c) => !!(c && c.id != null && c.payload && typeof c.payload.name === 'string');
 const decisionOk = (d) => !!(d && d.id != null && d.payload && d.payload.repoId && d.payload.decision);
 const snapshotOk = (r) => !!(r && r.id != null && r.repoId && Array.isArray(r.snaps));
+const sceneOk = (s) => !!(s && s.id && s.scope && Array.isArray(s.nodes) && Array.isArray(s.edges));
 
 /** Empty normalized shape — the safe fallback when a file can't be parsed. */
 function emptyValue() {
-  return { repos: [], nodes: [], edges: [], cache: [], collections: [], decisions: [], snapshots: [] };
+  return { repos: [], nodes: [], edges: [], cache: [], collections: [], decisions: [], snapshots: [], scenes: [] };
 }
 
 /**
@@ -39,14 +40,14 @@ function emptyValue() {
  * @param {{ repos?: object[], nodes?: object[], edges?: object[], cache?: object[], exportedAt?: string }} [parts]
  * @returns {object}
  */
-export function buildBackup({ repos, nodes, edges, cache, collections, decisions, snapshots, exportedAt } = {}) {
-  const r = arr(repos), n = arr(nodes), e = arr(edges), c = arr(cache), col = arr(collections), dec = arr(decisions), snap = arr(snapshots);
+export function buildBackup({ repos, nodes, edges, cache, collections, decisions, snapshots, scenes, exportedAt } = {}) {
+  const r = arr(repos), n = arr(nodes), e = arr(edges), c = arr(cache), col = arr(collections), dec = arr(decisions), snap = arr(snapshots), sc = arr(scenes);
   return {
     format: BACKUP_FORMAT,
     version: BACKUP_VERSION,
     exportedAt: exportedAt || new Date().toISOString(),
-    counts: { repos: r.length, nodes: n.length, edges: e.length, cache: c.length, collections: col.length, decisions: dec.length, snapshots: snap.length },
-    repos: r, nodes: n, edges: e, cache: c, collections: col, decisions: dec, snapshots: snap,
+    counts: { repos: r.length, nodes: n.length, edges: e.length, cache: c.length, collections: col.length, decisions: dec.length, snapshots: snap.length, scenes: sc.length },
+    repos: r, nodes: n, edges: e, cache: c, collections: col, decisions: dec, snapshots: snap, scenes: sc,
   };
 }
 
@@ -88,6 +89,7 @@ export function validateBackup(obj) {
     collections: clamp('collections', arr(obj.collections).filter(collectionOk)),
     decisions: clamp('decisions', arr(obj.decisions).filter(decisionOk)),
     snapshots: clamp('snapshots', arr(obj.snapshots).filter(snapshotOk).map((r) => ({ ...r, snaps: arr(r.snaps).slice(-SNAP_CAP) }))),
+    scenes: clamp('scenes', arr(obj.scenes).filter(sceneOk)),
   };
   return { ok: errors.length === 0, errors, warnings, value };
 }
@@ -100,7 +102,7 @@ export function validateBackup(obj) {
  */
 export function summarizeBackup(obj) {
   const { value } = validateBackup(obj);
-  return { repos: value.repos.length, nodes: value.nodes.length, edges: value.edges.length, cache: value.cache.length, collections: value.collections.length, decisions: value.decisions.length, snapshots: value.snapshots.length };
+  return { repos: value.repos.length, nodes: value.nodes.length, edges: value.edges.length, cache: value.cache.length, collections: value.collections.length, decisions: value.decisions.length, snapshots: value.snapshots.length, scenes: value.scenes.length };
 }
 
 /**

blueprint-adapter.js

@@ -0,0 +1,40 @@
+// blueprint-adapter.js
+// Deep Dive atoms/lineage → a laid-out Blueprint scene.
+
+import { createScene } from './scene.js';
+import { repairGraph } from './repair-graph.js';
+import { layoutBlueprint } from './canvas-layout.js';
+
+/**
+ * @param {object} args
+ * @param {{atoms:any[], lineage:{links:any[], roots?:string[], leaves?:string[]}}} args.deepDive
+ * @param {string} args.repoId
+ * @param {string} args.title
+ * @param {string|null} [args.scanAt]
+ * @param {(atom:object)=>string} [args.layerOf]  defaults to atom.kind
+ * @param {boolean} [args.withIssues]  when true, returns { scene, issues }
+ * @returns {object|{scene:object, issues:object[]}}
+ */
+export function buildBlueprintScene({ deepDive, repoId, title, scanAt = null, layerOf = (a) => a.kind, withIssues = false }) {
+  const atoms = (deepDive && deepDive.atoms) || [];
+  const links = (deepDive && deepDive.lineage && deepDive.lineage.links) || [];
+  const roots = new Set((deepDive && deepDive.lineage && deepDive.lineage.roots) || []);
+
+  const layerByAtomId = Object.fromEntries(atoms.map((a) => [a.id, layerOf(a) ?? null]));
+  const { nodes, edges, issues } = repairGraph({
+    nodes: atoms.map((a) => ({ ...a, layer: layerByAtomId[a.id] })),
+    edges: links,
+  });
+
+  // mark lineage roots (load-bearing) so the engine can highlight them (immutably)
+  const marked = nodes.map((n) => ({ ...n, ref: { ...(n.ref || {}), root: roots.has(n.id) } }));
+
+  const placed = layoutBlueprint(marked, edges);
+
+  const scene = createScene({ scope: 'blueprint', repoId, title });
+  scene.nodes = placed;
+  scene.edges = edges;
+  scene.source.scanAt = scanAt;
+
+  return withIssues ? { scene, issues } : scene;
+}

canvas-demo.html

@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8" />
+  <title>Canvas demo — RepoLens Blueprint</title>
+  <link rel="stylesheet" href="./themes.css" />
+  <style>
+    /* Case File fallbacks so the demo renders standalone (themes.css canvas rules use these tokens). */
+    :root { --bg:#fbf6ea; --surface:#fffdf6; --text:#211c14; --text-sub:#5a4f3e; --accent:#c2691c; --border:#b9a273; --dur:.2s; --ease-out:cubic-bezier(.16,1,.3,1); }
+    body { margin:0; font-family:ui-monospace,monospace; background:#efe4c9; color:#211c14; padding:24px; }
+    h1 { font-size:18px; margin:0 0 4px; }
+    .sub { font-size:12px; color:#6b5a36; margin:0 0 16px; }
+    .frame { max-width:900px; border:1px solid #b9a273; border-radius:14px; overflow:hidden; background:#fff; box-shadow:0 10px 30px rgba(33,28,20,.14); }
+    .bar { display:flex; gap:8px; align-items:center; padding:9px 12px; background:#f6eed7; border-bottom:1px solid #b9a273; font-size:12px; }
+    .bar button { padding:5px 11px; border-radius:7px; font-size:12px; cursor:pointer; border:1px solid #211c14; background:#fffdf6; }
+    .host { position:relative; height:520px; }
+  </style>
+</head>
+<body>
+  <h1>🔭 RepoLens — Blueprint canvas (live demo)</h1>
+  <p class="sub">Real pipeline: <code>buildBlueprintScene</code> → <code>layoutBlueprint</code> → <code>mountCanvas</code> → <code>buildTour</code>/<code>startTour</code>. No extension, no API.</p>
+  <div class="frame">
+    <div class="bar">
+      <strong>output-tab · evanw/esbuild</strong>
+      <span style="flex:1"></span>
+      <button id="tour">▶ Guided Tour</button>
+    </div>
+    <div class="host" id="host"></div>
+  </div>
+
+  <script type="module">
+    import { buildBlueprintScene } from './blueprint-adapter.js';
+    import { mountCanvas } from './canvas-engine.js';
+    import { buildTour } from './tour.js';
+    import { startTour } from './tour-runner.js';
+
+    const deepDive = {
+      atoms: [
+        { id: 'cli', name: 'CLI', kind: 'entrypoint', purpose: 'Parses argv and dispatches a build.' },
+        { id: 'config', name: 'config', kind: 'data', purpose: 'Resolved build options.' },
+        { id: 'core', name: 'core', kind: 'subsystem', purpose: 'The build engine — everything routes through here.' },
+        { id: 'bundler', name: 'bundler', kind: 'module', purpose: 'Walks imports and concatenates modules.' },
+        { id: 'plugins', name: 'plugins', kind: 'module', purpose: 'User hooks into resolve/load.' },
+        { id: 'output', name: 'output', kind: 'module', purpose: 'Writes the final files to disk.' },
+      ],
+      lineage: {
+        links: [
+          { from: 'cli', to: 'core', relation: 'depends-on' },
+          { from: 'config', to: 'core', relation: 'depends-on' },
+          { from: 'core', to: 'bundler', relation: 'triggers' },
+          { from: 'bundler', to: 'plugins', relation: 'enables' },
+          { from: 'bundler', to: 'output', relation: 'triggers' },
+        ],
+        roots: ['cli', 'core'],
+        leaves: ['output'],
+      },
+    };
+
+    const host = document.getElementById('host');
+    const scene = buildBlueprintScene({ deepDive, repoId: 'evanw/esbuild', title: 'esbuild' });
+    const api = mountCanvas(host, scene, {});
+    let tour = null;
+    document.getElementById('tour').onclick = () => {
+      if (tour) tour.exit();
+      tour = startTour({ host, engine: api, steps: buildTour(scene, { roots: deepDive.lineage.roots }), autoplay: false });
+    };
+    window.__startTour = () => document.getElementById('tour').click();  // for the screenshot harness
+  </script>
+</body>
+</html>