Paul Kloppers
7217e3553b
Previous wiki_recipe only returned the page thumbnail, so "send me the
recipe image" delivered a picture of the item, not the recipe itself.
minecraft.wiki renders recipes as live HTML grids, not standalone PNGs,
so we now generate the image ourselves.
mcp/lib/minecraft-wiki-tools.ts:
- parseCraftingGrid(html): pulls the 3×3 input grid + result item URL
from <span class="mcui mcui-Crafting_Table">. Each <span class="invslot">
is either empty (chunk starts with </span>) or has an <img src="/images/
Invicon_X.png?h">. Reading-order chunks → grid; first non-null after
the 9th input slot → result.
- composeRecipePng(grid, result): fetches each unique sprite, resizes
to 64×64 via sharp (nearest-neighbour to keep pixel art crisp),
composites onto a #8b8b8b inventory-style background with #6f6f6f
slot squares + dark borders, places an SVG-rendered "→" arrow,
then the result cell next to it. PNG buffer returned.
- New tool wiki_recipe_image(title, chat, caption?) that runs the
pipeline end-to-end and uploads via tg.sendPhotoBytes — one tool
call, image already in the chat when it returns.
mcp/lib/types.ts:
- TgClient gains sendPhotoBytes({ chat_id, bytes, filename?, caption?,
parse_mode?, reply_to_message_id? }). Multipart/form-data POST to
sendPhoto, since Telegram's URL-mode can only fetch public URLs and
the composited PNG only lives in memory. 30s timeout (vs the 20s on
the JSON call) because uploads are bigger.
mcp/package.json + bot/package.json: add sharp ^0.33.5. mcp/ pulls it
in too so /mc/mcp/lib resolves it at the bot's runtime (the bot's
node_modules is at /app while the lib files live at /mc/mcp/lib).
Persona prompt: wiki_recipe_image is now the FIRST call for any
"recipe" / "send me the recipe image" request. Single tool turn ends
with the photo already in the chat. wiki_recipe stays as a fallback
when the page has no 3×3 crafting widget (smelting / brewing / smithing
use different mcui classes).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>