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Generate publication-quality chart images from data. Supports line, bar, area, and point charts.
Passed 13 of 17 test cases with the skill, and 9 of 17 without it.
and 15 more in the full report
8 fixed9 passed either way2 still failing3 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
What command should be run inside the project workspace directory prior to generating images to install required node dependencies locally?
| Checked | Without skill | With skill |
|---|---|---|
| cd /data/clawd/skills/chart-image/scripts | Missed | Passed |
| npm install | Passed | Passed |
The instructions your model reads when the skill loads.
Generate PNG chart images from data using Vega-Lite. Perfect for headless server environments.
Built for Fly.io / VPS / Docker deployments:
canvas which requires build tools)Alternatives and why they don't work well on Fly:
canvas npm - Requires native compilation, fails on minimal Docker imagescd /data/clawd/skills/chart-image/scripts && npm install
node /data/clawd/skills/chart-image/scripts/chart.mjs \
--type line \
--data '[{"x":"10:00","y":25},{"x":"10:30","y":27},{"x":"11:00","y":31}]' \
--title "Price Over Time" \
--output chart.png
# Full data with zoomed Y-axis
node /data/clawd/skills/chart-image/scripts/chart.mjs \
test cases passed, vs 9 / 17 without
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