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2026-10-11 — Session Log (raw)

Canva Design Skill — descriptor editing (P2) + site colours (P3)

Work on ~/.config/opencode/skills/canva-design/. Model throughout: a design is a real HTML file on disk; the browser never rewrites the file — it collects change descriptors and the server patches the source through lib/patch.js. The model returns descriptors, never a document ("ask, don't write").

P2 — descriptor editing

  • lib/patch.js: added the insert descriptor kind ({ed, where: append|prepend|before|after, html}), sanitised first (rejects <script>, inline on*= handlers, javascript: URLs). Added catalog(html) — a flat index of every element with its exact ed path, tag, class/id and text snippet, so the planner picks paths instead of hand-counting child indices.
  • lib/apply-descriptors.js: agent-side CLI that applies a JSON plan of descriptors to a design file — dry-run by default, --write persists, prints the diff. The agent-side equivalent of the editor's Apply.
  • /api/ask (in editor/editor-server.js): natural language → a plan of descriptors, each one dry-run through the patcher before it is returned. This replaced the old freeform /api/chat (removed).
  • editor/editor.html + editor.js: new Ask panel (#askMsg / #askBtn); staged changes are applied to the staging iframe via applyToDom and listed as pending (Apply/Discard). Insert undo tracked via an insertedNodes map. Image "Add" now persists through an insert descriptor.
  • Bugs fixed: pushDescriptor swallowed inserts (dedupe hit undefined === undefined); describe() mislabelled inserts.

P3 — site colours

  • New lib/palette.js (+ lib/test-palette.js, 19 checks). Exports toHex, extractFromHtml, extractFromPage, extractSite, fetchUrl.
  • Two-tier extraction: HTML tier (curl — theme-color meta + CSS tokens + ranked hex/rgba) and rendered tier (cached Chromium — body bg/text, h1, links, buttons, header, logo).
  • fetchUrl shells out to curl (--max-time 15 --max-filesize 2MB); Node's fetch() stalls against this box.
  • /api/ask now auto-detects a URL in the request, fetches the site palette, injects a SITE COLOUR SCHEME section into the prompt, and enforces swatch membership server-side (palette.toHex(desc.to) must be in the fetched set, else the descriptor is skipped). No palette fetched → the model is told to return {"question": "..."} instead of guessing.
  • Bug fixes: detectUrl regex tightened to one-or-more labels + a TLD (it previously required two dot-segments, so linear.app silently never fetched — now tested across 7 cases); removed the slice that truncated site.swatches to 12 (it was falsely flagging an in-palette colour); parsePlan hardened (bracket-balanced; accepts a bare array).

Verification

  • lib/test-patch.js → 321 checks pass; lib/test-palette.js → 19 pass; all files node --check clean.
  • Live: extractSite(https://linear.app) ≈ 4 s → bg #08090a / text #f7f8f8 + Linear brand swatches; spotify.com → #b3b3b3 / #1f1f1f.
  • Browser loop: "recolour using https://linear.app" → status site linear.app (24 colours) · 6 changes staged → 6 cssvar descriptors → exactly a 6-line diff in the file.
  • Ambiguous "make it violet" → {"question"} offering #8fa4ff vs #f79ce0 (no guessing).

Environment

  • editor-server.js binds 127.0.0.1:8790 (8791/8792 used for tests). Routes are read at process start → restart required after code changes. Autostarted at login via Hyprland (~/.config/hypr/modules/autostart.lua).
  • OpenCode bridge (ocGenerate) spawns the opencode api CLI; model opencode/mimo-v2.6-flash-free (reliable; big-pickle historically returned empty).
  • Docs updated: SKILL.md + editor/README.md. Backups: lib/*.bak.20261011-p2, editor/*.bak.20261011-p2 / -p3.

LEMO "NEW SITE COMING SOON" Instagram post

Request: a 1080×1080 Instagram post saying NEW SITE COMING SOON, using the colour palette of lemo.com, with small LEMO connector images (e.g. EGG.0B.302.CLL, FGG.0B.302.CLAD52) scattered around.

  • Built designs/lemo-coming-soon.html from templates/social-post.html via a descriptor plan (cssvar + text + insert), applied with lib/apply-descriptors.js --write.
  • Palette from extractSite(lemo.com): brand blue #0079CA, navy #003399, white/black, plus LEMO UI greys #F5F5F5 / #4A4A4A. (A hand-guessed lemo colours.txt in ~/Downloads/work/lemo/ lists approximate blues + an accent red #CC0000 — not used.)
  • Connector images sourced from the Shopify CDN via the product export CSV (~/Downloads/work/lemo/products_export_1_stripped_v3.csv, Image Src column): EGG_CLL.webp (EGG.0B.302.CLL) and FGG_CLAD.webp (FGG.0B.302.CLAD52). Both 450×450, ~10 KB — and actually JPEG bytes despite the .webp name → embedded as image/jpeg data URLs so they travel with the file (render / editor / export).

Iterations this session:

  1. First cut scattered 5 rotated connector images around the edges.
  2. Removed the connectors entirely → clean typographic post.
  3. Footer: dropped the @lemo.com brand span; site → johnbarry.com.au.
  4. Sub copy → "The new LEMO site is on its way. John Barry Sales, the official LEMO agent, is redesigning its website — same original push-pull connectors, rebuilt for speed and clarity."

  5. Replaced the blue "LEMO" wordmark pill with the real lemo.com logo (https://www.lemo.com/themes/custom/lemo/logo.svg — 163×32, solid #0079CA), embedded as an SVG data URL, 200 px wide, top-left, pill background/padding removed.

  6. Rendered with lib/render.js → 2160×2160 (2×) at /tmp/opencode/lemo-coming-soon.png; preview via lib/serve.js on http://localhost:8787/.

  7. Layout verified with a Playwright geometry probe: logo at 90,90 → 290,129, label clear of the headline (top 305), nothing off-canvas, no text collisions.
  8. Files: ~/.config/opencode/skills/canva-design/designs/lemo-coming-soon.html (+ .bak pre-logo snapshot). The user also started designs/insta-coming-soon.html in the editor (default palette) — left untouched.
  9. Business detail: John Barry Sales (johnbarry.com.au) is the official LEMO agent (AU).

Vault

  • New: raw/2026-10-11.md (this), wiki/sessions/2026-10-11.md.
  • Updated: [[OpenCode Canva Design Skill]] (editor now uses Ask + descriptors + site colours; /api/chat removed), [[Canva Editor Improvement Backlog]] (note that freeform chat is gone), [[JBS LEMO Shopify Storefront]] (marketing asset pointer). [[Index]] updated.
  • Memory MCP: added to project_lemo_store — "Business/agent site: johnbarry.com.au (John Barry & Associates — LEMO agent); used on social posts instead of lemo.com".