Dify Component Writing Guide
langgenius/dify
Use when implementing or refactoring React/TypeScript components and the task requires decisions about component ownership, feature boundaries, state, data…
Guide for writing or reviewing PostHog kea logic files (Logic.ts / Logic.tsx).
Install Writing Kea Logics
$ npx skills add PostHog/posthog --skill writing-kea-logics -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install PostHog/posthog writing-kea-logics --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/writing-kea-logics .claude/skills/writing-kea-logics && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .claude/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logicsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add PostHog/posthog --skill writing-kea-logics -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install PostHog/posthog writing-kea-logics --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/writing-kea-logics .agents/skills/writing-kea-logics && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .agents/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add PostHog/posthog --skill writing-kea-logics -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install PostHog/posthog writing-kea-logics --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/writing-kea-logics .cursor/skills/writing-kea-logics && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .cursor/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/PostHog/posthog.git --path .agents/skills/writing-kea-logics--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add PostHog/posthog --skill writing-kea-logics -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install PostHog/posthog writing-kea-logics --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/writing-kea-logics .gemini/skills/writing-kea-logics && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .gemini/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install PostHog/posthog writing-kea-logicsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add PostHog/posthog --skill writing-kea-logics -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/writing-kea-logics .github/skills/writing-kea-logics && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .github/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add PostHog/posthog --skill writing-kea-logics -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install PostHog/posthog writing-kea-logics --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/writing-kea-logics .opencode/skills/writing-kea-logics && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "writing-kea-logics" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/writing-kea-logics into .opencode/skills/writing-kea-logics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "writing-kea-logics", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
writing-kea-logics- GitHub stars
- 40k
- Token cost
- ~2.3k tokens
- SKILL.md length
- 769 words
- Files
- 12 (incl. references)
- Skills in repo
- 252
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guide for writing or reviewing PostHog kea logic files (Logic.ts / Logic.tsx).
- Works in 5 steps: Business logic lives in a logic, not in… → One concept, one source of truth. Pick… → Prefer listeners over kea-subscriptions.… → …
- Creating a new logic
- SKILL.md covers Use this skill when, Companion skills (do not…, Core principles and Anatomy at a glance, plus 4 more sections
- Calls pnpm
What it does
Writing Kea Logics is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Guide for writing or reviewing PostHog kea logic files (Logic.ts / Logic.tsx). Use when creating a new logic, adding actions/reducers/selectors/listeners/loaders/forms/router bindings, choosing between reducer vs selector vs cache, deciding between listeners and kea-subscriptions, wiring React with useValues/useActions/BindLogic, or onboarding to kea conventions. Read keajs.org for upstream API; this skill captures PostHog-specific conventions and idioms.
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including reference files (for example `references/anti-patterns.md`, `references/connecting-logics.md` and `references/forms.md`).
It sits in Frontend & Design, covering State management and React components. It works with PostHog and React. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…
When your agent uses it
- Creating a new logic
- Adding actions/reducers/selectors/listeners/loaders/forms/router bindings
- Choosing between reducer vs selector vs cache
- Deciding between listeners and kea-subscriptions
Example prompts
- “/writing-kea-logics”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Business logic lives in a logic, not in a component.
- One concept, one source of truth. Pick exactly one of: action-driven reducer,
- Prefer listeners over kea-subscriptions. Subscriptions install a redux
- Generated types are the contract. Every logic has an inline generated
- Resources that need cleanup go through cache.disposables. See the
What it can do on your machine
Read from SKILL.md and the folder at commit 812e5c6. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
keajs.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Writing Kea Logics loads about 2.3k tokens when it runs, and up to ~17k if it reads all its reference files. Until then it costs about 123 tokens; SKILL.md has 769 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 769 words (~2,328 tokens).
“PostHog uses kea as the state container for the frontend. Almost all non-trivial business logic lives in a *Logic.ts / *Logic.tsx file, not in React. We may be on a kea pre-release ahead of the version the keajs.org docs cover…”
- name
- writing-kea-logics
Files
SKILL.md and 11 other files (references) in .agents/skills/writing-kea-logics of PostHog/posthog.
- SKILL.md
- references/anti-patterns.md
- references/connecting-logics.md
- references/forms.md
- references/keyed-logics.md
- references/loading-data.md
- references/persisting-state.md
- references/polling.md
- references/reacting-to-changes.md
- references/routing.md
- references/state-decision.md
- references/testing.md
Open the folder on GitHubat commit 812e5c6
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Writing Kea Logics next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Writing Kea Logics this skillPostHog/posthog | 40k | — | ~2.3k | Automated safety check: Pass | Custom licence | |
| Dify Component Writing Guidelanggenius/dify | 158k | — | ~626 | Automated safety check: Pass | Custom licence | |
| Opik Frontend Patternscomet-ml/opik | 22k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Frontendredis/RedisInsight | 8.9k | — | ~3.2k | Automated safety check: Pass | Custom licence | |
| Compose Atomslobehub/lobehub | 83k | — | ~2.6k | Automated safety check: Pass | Custom licence | |
| Frontend Typescript Rulesshinpr/ai-coding-project-boilerplate | 233 | — | ~1.7k | Automated safety check: Pass | MIT |
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Categories
Questions about Writing Kea Logics
What does Writing Kea Logics do?
Guide for writing or reviewing PostHog kea logic files (Logic.ts / Logic.tsx). Writing Kea Logics is an agent skill from PostHog/posthog, published by the product's own GitHub organization.tsx).
When should I use Writing Kea Logics?
Writing Kea Logics fits situations like: creating a new logic; adding actions/reducers/selectors/listeners/loaders/forms/router bindings; choosing between reducer vs selector vs cache; deciding between listeners and kea-subscriptions.
How do I install Writing Kea Logics in Claude Code?
Run `npx skills add PostHog/posthog --skill writing-kea-logics -a claude-code`. Or copy the skill folder (.agents/skills/writing-kea-logics in PostHog/posthog) into .claude/skills/writing-kea-logics in your project. Claude Code loads it when a task matches its description.
How do I install Writing Kea Logics in Codex?
Run `npx skills add PostHog/posthog --skill writing-kea-logics -a codex`. Or copy the skill folder (.agents/skills/writing-kea-logics in PostHog/posthog) into .agents/skills/writing-kea-logics in your project. Codex loads it when a task matches its description.
Can I use Writing Kea Logics in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add PostHog/posthog --skill writing-kea-logics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/writing-kea-logics, .gemini/skills/writing-kea-logics, .github/skills/writing-kea-logics and .opencode/skills/writing-kea-logics in your project.
What does Writing Kea Logics need to run?
Going by SKILL.md and its folder, Writing Kea Logics needs the command-line tools its instructions call (pnpm).
Does Writing Kea Logics access the network?
SKILL.md names 1 domain. As links in the text: keajs.org. This is read from the text; nothing was executed.
Is Writing Kea Logics safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Writing Kea Logics use?
Writing Kea Logics has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Writing Kea Logics use?
About 2.3k tokens (SKILL.md is roughly 9.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 14k tokens, read only when the agent opens those files.
What are the alternatives to Writing Kea Logics?
Skills that share tags, products or a category with Writing Kea Logics: Dify Component Writing Guide (langgenius/dify, 158k stars), Opik Frontend Patterns (comet-ml/opik, 22k stars), Frontend (redis/RedisInsight, 8.9k stars) and Compose Atoms (lobehub/lobehub, 83k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Writing Kea Logics?
PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,200 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 9, 2026.
Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.