Tanstack Query Best Practices
DeckardGer/tanstack-agent-skills
TanStack Query (React Query) best practices for data fetching, caching, mutations, and server state management.
Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture.
Install Effect Development
$ npx skills add danieljvdm/effect-cf --skill effect-development -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install danieljvdm/effect-cf effect-development --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/danieljvdm/effect-cf.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/effect-development .claude/skills/effect-development && 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 "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .claude/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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/danieljvdm/effect-cf/tree/main/.agents/skills/effect-developmentType 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 danieljvdm/effect-cf --skill effect-development -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install danieljvdm/effect-cf effect-development --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/effect-development .agents/skills/effect-development && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .agents/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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 danieljvdm/effect-cf --skill effect-development -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install danieljvdm/effect-cf effect-development --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/effect-development .cursor/skills/effect-development && 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 "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .cursor/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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/danieljvdm/effect-cf.git --path .agents/skills/effect-development--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 danieljvdm/effect-cf --skill effect-development -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install danieljvdm/effect-cf effect-development --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/effect-development .gemini/skills/effect-development && 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 "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .gemini/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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 danieljvdm/effect-cf effect-developmentInstalls 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 danieljvdm/effect-cf --skill effect-development -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/effect-development .github/skills/effect-development && 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 "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .github/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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 danieljvdm/effect-cf --skill effect-development -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install danieljvdm/effect-cf effect-development --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/danieljvdm/effect-cf.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/effect-development .opencode/skills/effect-development && 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 "effect-development" agent skill from https://github.com/danieljvdm/effect-cf/tree/main/.agents/skills/effect-development into .opencode/skills/effect-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-development", 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
effect-development- GitHub stars
- 111
- Used in
- 1 other repo
- Token cost
- ~369 tokens
- SKILL.md length
- 161 words
- Files
- 24 (incl. references)
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture.
- Tasks that involve REST APIs
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve State management
What it does
Effect Development is an agent skill from danieljvdm/effect-cf. Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture.
Its SKILL.md is about 370 tokens, which your agent loads only when the skill is triggered. The skill folder holds 28 other files, including reference files (for example `.dev-kit-origin.json`, `agents/openai.yaml` and `references/api/cloudflare-workers.md`).
It sits in Backend & APIs, covering REST APIs and State management. It works with React. The repository describes itself as: Effect-native primitives for Cloudflare Workers and bindings. The licence is MIT.
When your agent uses it
- Tasks that involve REST APIs
- Tasks that involve State management
Example prompts
- “/effect-development”
What it can do on your machine
Read from SKILL.md and the folder at commit 0877e66. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Effect Development loads about 369 tokens when it runs, and up to ~17k if it reads all its reference files. Until then it costs about 28 tokens; SKILL.md has 161 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
The full file from danieljvdm/effect-cf at commit 0877e66, republished under its MIT licence (© danieljvdm). 161 words, ~369 tokens.
Download SKILL.mdSave it as
.claude/skills/effect-development/SKILL.md (or your agent's skills folder). This skill also uses 23 other files; get the full folder from GitHub.- name
- effect-development
- description
- Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture.
Effect development
Read the repository's node_modules/effect/AGENTS.md completely before writing
or evaluating Effect code, then follow its relevant links. Installed declarations
and repository policy own version-sensitive APIs and verification commands.
Read only the guide for the requested boundary:
- React queries, mutations, shared state, workflows, or SSR: Effect Atom.
- HTTP contracts, handlers, middleware, or server runtimes: HTTP APIs.
- Scripts, CI automation, or command-line applications: CLIs.
- A requested architecture review or service-boundary refactor: architecture.
- Adding Effect dependencies or its agent guidance: setup.
For Effect React applications, Effect Atom owns shared state and server data; React renders and dispatches. View-local state can stay in React. Keep business logic in Effect workflows and declare cross-query invalidation as mutation reactivity keys. Read the Atom guide for runtime and registry ownership.
Preserve the requested scope. A component edit does not require a server rewrite or architecture audit. Follow repository policy for committed tests; changes to an atom, endpoint, or script do not by themselves justify a new test.
© danieljvdm, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 23 other files (references) in .agents/skills/effect-development of danieljvdm/effect-cf.
- SKILL.md
- .dev-kit-origin.json
- agents/openai.yaml
- references/api/cloudflare-workers.md
- references/api/index.md
- references/api/runtime-assembly.md
- references/api/schema-codecs.md
- references/api/server-and-middleware.md
- references/api/shared-contracts.md
- references/api/verification.md
- references/architecture/index.md
- references/architecture/service-and-boundary-audit.md
- references/atom/effect-atom-client.md
- references/atom/effect-atom-lifecycle.md
- references/atom/effect-atom-testing.md
- references/atom/effect-atom-workflows.md
- … and 8 more
Open the folder on GitHubat commit 0877e66
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in danieljvdm/effect-cf, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Effect Development 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 |
|---|---|---|---|---|---|---|
| Effect Development this skilldanieljvdm/effect-cf | 111 | 1 repos | ~369 | Automated safety check: Pass | MIT | |
| Tanstack Query Best PracticesDeckardGer/tanstack-agent-skills | 222 | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| AI ClientOpentrons/opentrons | 521 | — | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| Databuddydatabuddy-analytics/Databuddy | 1.2k | — | ~2.1k | Automated safety check: Pass | AGPL-3.0 | |
| Shadmin CLIahaodev/shadmin | 174 | — | ~1.1k | Automated safety check: Notes | MIT | |
| Helpers And Infra Keeperdiscord-php/DiscordPHP | 1.1k | — | ~2.2k | Automated safety check: Pass | MIT |
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Shadmin CLI
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Build AI agents on Cloudflare Workers using the Agents SDK. An agent skill from hodgef/apiker.
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Related
Works with
Categories
Questions about Effect Development
What does Effect Development do?
Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture. Effect Development is an agent skill from danieljvdm/effect-cf. Set up Effect, implement Atom React state, HTTP APIs or CLIs, and review Effect architecture.
When should I use Effect Development?
Effect Development fits situations like: tasks that involve REST APIs; tasks that involve State management.
How do I install Effect Development in Claude Code?
Run `npx skills add danieljvdm/effect-cf --skill effect-development -a claude-code`. Or copy the skill folder (.agents/skills/effect-development in danieljvdm/effect-cf) into .claude/skills/effect-development in your project. Claude Code loads it when a task matches its description.
How do I install Effect Development in Codex?
Run `npx skills add danieljvdm/effect-cf --skill effect-development -a codex`. Or copy the skill folder (.agents/skills/effect-development in danieljvdm/effect-cf) into .agents/skills/effect-development in your project. Codex loads it when a task matches its description.
Can I use Effect Development 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 danieljvdm/effect-cf --skill effect-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/effect-development, .gemini/skills/effect-development, .github/skills/effect-development and .opencode/skills/effect-development in your project.
What does Effect Development need to run?
SKILL.md names no scripts, command-line tools or credentials: Effect Development is instructions for the agent only.
Does Effect Development access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Effect Development 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 Effect Development use?
Effect Development is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Effect Development use?
About 369 tokens (SKILL.md is roughly 1.5k 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 17k tokens, read only when the agent opens those files.
What are the alternatives to Effect Development?
Skills that share tags, products or a category with Effect Development: Tanstack Query Best Practices (DeckardGer/tanstack-agent-skills, 222 stars), AI Client (Opentrons/opentrons, 521 stars), Databuddy (databuddy-analytics/Databuddy, 1.2k stars) and Shadmin CLI (ahaodev/shadmin, 174 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Effect Development?
danieljvdm (a GitHub user) maintains it in danieljvdm/effect-cf, which has 111 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 4, 2026.
Source: danieljvdm/effect-cf on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.