Agent skill · PostHog

PostHog Feature Flags (React) skill for Claude Code, Codex and Cursor

Wires PostHog feature flags into a React app.

Officialname: feature-flags-react★ 75 (repo)pushed 2026-10-24MITSKILL.md on GitHubchecked 2026-11-07

What it does, in the publisher's words

PostHog feature flags for React applications

The description field of the SKILL.md. The agent reads only this at startup and decides from it when to load the full skill.

Install PostHog Feature Flags (React)

The skills CLI copies the skill into the folder of each agent you pick (Claude Code, Codex, Cursor, Copilot, Gemini CLI, OpenCode, Windsurf...). Add -g for all projects. Needs Node.js 22.20+. docs

npx skills add PostHog/skills --skill feature-flags-react

This repo is a plugin marketplace. Inside Claude Code, add it and install the plugin that holds the skill (impersonation-toolkit, posthog-debugger, posthog-survey-creator, posthog-inbound-lead...), or copy only this skill into ~/.claude/skills. docs

/plugin marketplace add PostHog/skills
/plugin install <plugin>@PostHog-skills

# or only this skill:
npx skills add PostHog/skills --skill feature-flags-react -a claude-code

Download the skill folder, zip it, then Customize > Skills > + > Create skill > Upload a skill. Code execution must be on (Settings > Capabilities). docs

git clone --depth 1 https://github.com/PostHog/skills.git /tmp/react-src
cp -r /tmp/react-src/skills/posthog/feature-flags/skills/react ./feature-flags-react
zip -r feature-flags-react.zip feature-flags-react

Codex reads skills from .agents/skills in the repo or ~/.agents/skills. Type $ in Codex to use one. docs

npx skills add PostHog/skills --skill feature-flags-react -a codex

gh skill (GitHub CLI 2.90+, preview) installs it for Copilot in VS Code, the CLI and the cloud agent. Copilot also reads .github/skills and ~/.copilot/skills. docs

gh skill install PostHog/skills feature-flags-react

Cursor reads .cursor/skills, .agents/skills and ~/.cursor/skills (and .claude/skills). It does not install loose skills from a GitHub URL, so copy it in. docs

npx skills add PostHog/skills --skill feature-flags-react -a cursor

Installs from the GitHub repo; --path picks this skill out of the repo. Default scope is user (all projects). docs

gemini skills install https://github.com/PostHog/skills.git --path skills/posthog/feature-flags/skills/react

OpenCode reads .opencode/skills, ~/.config/opencode/skills and the Claude and .agents folders. docs

npx skills add PostHog/skills --skill feature-flags-react -a opencode

Windsurf (now Devin Desktop) reads .devin/skills, .windsurf/skills and ~/.codeium/windsurf/skills. docs

npx skills add PostHog/skills --skill feature-flags-react -a windsurf

Works with

Claude Code, Claude.ai and Claude Desktop, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode, Windsurf and other agents that read the open Agent Skills format.

What's in the SKILL.md

4 sections

Reference files
Key principles
PostHog MCP tools
Framework guidelines

Bundled files

references/adding-feature-flag-code.md
references/best-practices.md
references/react.md

Loaded only when the instructions point to them.

Facts

Skill name: feature-flags-react
Publisher: PostHog (official)
Repo: PostHog/skills
License: MIT
Version: 1.9.4
SKILL.md size: 312 words, 34 lines
Bundled files: 3, 3 docs
Repo stars: 75 (as of 2026-10-24)
SKILL.md checked: 2026-11-07

Pairs with the PostHog MCP server: the server gives the agent the tools, the skill teaches it how to use them.

Related data & analytics skills

BigQuery Basics · Google
PromQL · Grafana Labs

FAQ

What does the feature-flags-react skill do?+

Wires PostHog feature flags into a React app. In its own SKILL.md, PostHog describes it as: "PostHog feature flags for React applications"

How do I install the feature-flags-react skill?+

Run npx skills add PostHog/skills --skill feature-flags-react and pick your agents, or use the tab for your agent above. In Claude Code the skill ends up in ~/.claude/skills/feature-flags-react/SKILL.md; in Codex and Cursor in .agents/skills/feature-flags-react/.

Does PostHog Feature Flags (React) work in Codex, Cursor and Copilot, or only Claude?+

It's a standard SKILL.md, so any agent that reads the Agent Skills format can use it: Claude Code, the Claude apps, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode, Windsurf and more.

Who maintains PostHog Feature Flags (React)?+

PostHog, the company or project behind it, in the PostHog/skills repo on GitHub, last pushed 2026-10-24. License: MIT.

Read a skill's SKILL.md and scripts before you install it: skills aren't verified by any agent vendor. Claude skills marketplace · How to install skills · MCP servers