matplotlib-charts
Produce PNG charts with matplotlib. Save to chart-<slug>.png in the working directory.
Best use case
matplotlib-charts is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Produce PNG charts with matplotlib. Save to chart-<slug>.png in the working directory.
Teams using matplotlib-charts should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/matplotlib-charts/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How matplotlib-charts Compares
| Feature / Agent | matplotlib-charts | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Produce PNG charts with matplotlib. Save to chart-<slug>.png in the working directory.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Matplotlib Charts
## Format
- One chart per question. No subplots unless the user asks.
- `figsize=(10, 6)`; keep labels readable.
- Save as PNG with `plt.savefig(path, dpi=120, bbox_inches="tight")`.
- Do not call `plt.show()` — the environment is headless (`MPLBACKEND=Agg`).
## Style
- Default matplotlib style is fine; avoid exotic third-party themes.
- Set a clear title, x/y labels, and rotate x ticks if labels overlap.
## Return contract
After saving the chart, your FINAL assistant message must include **exactly one** line:
`[CHART] chart-<slug>.png`
The host UI parses this marker to render the image. Do not wrap it in code fences, backticks, or quotes.
## Example
```python
import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
fig, ax = plt.subplots(figsize=(10, 6))
ax.bar(products, revenues)
ax.set_title("Revenue by product")
ax.set_ylabel("Revenue ($)")
plt.savefig("chart-revenue.png", dpi=120, bbox_inches="tight")
```
Then end your reply with:
`[CHART] chart-revenue.png`Related Skills
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