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Writing Streamlit Apps

Category: Engineering  ·  Sub-category: performance  ·  Last updated:
lang:python
Write Streamlit app source code that runs well in a PostHog sandbox — the posthog_apps.query() bridge for reading PostHog data, the packages baked into the sandbox image, caching and session state across Streamlit reruns, layout and chart patterns, and the app.py entry point with any helper modules and data files bundled beside it. Use when authoring or debugging the Python source of a PostHog Streamlit app, when a query inside an app fails, or when asked to "write a streamlit app that shows PostHog data".
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From the source SKILL.md

The source you write becomes app.py at the root of a sandboxed Streamlit 1.31 runtime. Deployment mechanics (create/start/share) are the managing-streamlit-apps skill; this one is about the code.

What this skill does

Writing Streamlit Apps is a community-contributed Claude Code skill in the performance sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/writing-streamlit-apps/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when authoring or debugging the Python source of a PostHog Streamlit app, when a query inside an app fails, or when asked to "write a streamlit app that shows PostHog data".

Who uses this skill

The Writing Streamlit Apps Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/writing-streamlit-apps
curl -L https://claudskills.com/skills/writing-streamlit-apps/SKILL.md \
  -o ~/.claude/skills/writing-streamlit-apps/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/writing-streamlit-apps/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/writing-streamlit-apps/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\writing-streamlit-apps\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Writing Streamlit Apps Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/writing-streamlit-apps/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Writing Streamlit Apps skill do?
Write Streamlit app source code that runs well in a PostHog sandbox — the posthog_apps.query() bridge for reading PostHog data, the packages baked into the sandbox image, caching and session state across Streamlit reruns, layout and chart patterns, and the app.py entry point with any helper modules and data files bundled beside it. Use when authoring or debugging the Python source of a PostHog Streamlit app, when a query inside an app fails, or when asked to "write a streamlit app that shows PostHog data".
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Writing Streamlit Apps skill?
Use Writing Streamlit Apps when your Claude Code task falls under the Engineering category — specifically in the performance area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Writing Streamlit Apps" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Writing Streamlit Apps skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Writing Streamlit Apps is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
PostHog. (2026). Writing Streamlit Apps [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/writing-streamlit-apps/
BibTeX
@misc{writing-streamlit-apps-2026,
  author    = {PostHog},
  title     = {Writing Streamlit Apps [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/writing-streamlit-apps/}
}

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