React Native Best Practices
vercel-labs/openreview
A prioritized rule set for React Native and Expo apps covering list performance, animation, navigation, UI patterns, state, rendering, monorepos and configuration.
Discovers and injects project-specific coding guidelines from .trellis/spec/ before implementation begins.
Install Trellis Before Dev
$ npx skills add anjiemo/SunnyBeach --skill trellis-before-dev -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install anjiemo/SunnyBeach trellis-before-dev --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/anjiemo/SunnyBeach.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/trellis-before-dev .claude/skills/trellis-before-dev && 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 "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .claude/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-devType 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 anjiemo/SunnyBeach --skill trellis-before-dev -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install anjiemo/SunnyBeach trellis-before-dev --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anjiemo/SunnyBeach.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/trellis-before-dev .agents/skills/trellis-before-dev && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .agents/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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 anjiemo/SunnyBeach --skill trellis-before-dev -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install anjiemo/SunnyBeach trellis-before-dev --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anjiemo/SunnyBeach.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/trellis-before-dev .cursor/skills/trellis-before-dev && 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 "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .cursor/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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/anjiemo/SunnyBeach.git --path .agents/skills/trellis-before-dev--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 anjiemo/SunnyBeach --skill trellis-before-dev -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install anjiemo/SunnyBeach trellis-before-dev --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anjiemo/SunnyBeach.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/trellis-before-dev .gemini/skills/trellis-before-dev && 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 "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .gemini/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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 anjiemo/SunnyBeach trellis-before-devInstalls 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 anjiemo/SunnyBeach --skill trellis-before-dev -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/anjiemo/SunnyBeach.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/trellis-before-dev .github/skills/trellis-before-dev && 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 "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .github/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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 anjiemo/SunnyBeach --skill trellis-before-dev -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install anjiemo/SunnyBeach trellis-before-dev --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anjiemo/SunnyBeach.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/trellis-before-dev .opencode/skills/trellis-before-dev && 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 "trellis-before-dev" agent skill from https://github.com/anjiemo/SunnyBeach/tree/master/.agents/skills/trellis-before-dev into .opencode/skills/trellis-before-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "trellis-before-dev", 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
trellis-before-dev- GitHub stars
- 178
- Used in
- 8 other repos
- Token cost
- ~398 tokens
- SKILL.md length
- 137 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Discovers and injects project-specific coding guidelines from .trellis/spec/ before implementation begins.
- Works in 6 steps: Discover packages and their spec layers → Identify which specs apply to your task… → Read the spec index for each relevant… → …
- Starting a new coding task
- Calls python
- Before writing any code
What it does
Trellis Before Dev is an agent skill from anjiemo/SunnyBeach. Discovers and injects project-specific coding guidelines from .trellis/spec/ before implementation begins. Reads spec indexes, pre-development checklists, and shared thinking guides for the target package. Use when starting a new coding task, before writing any code, switching to a different package, or needing to refresh project conventions and standards.
Its SKILL.md is about 400 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Mobile. The repository describes itself as: 这是一款基于 Kotlin、MVVM 和 Jetpack 构建的【阳光沙滩】社区开源Android客户端。我们的使命是让编程学习更简单，欢迎贡献！. The licence is Apache-2.0.
When your agent uses it
- Starting a new coding task
- Before writing any code
- Switching to a different package
- Needing to refresh project conventions and standards
Example prompts
- “Use the trellis-before-dev skill to discover and injects project-specific coding guidelines from .trellis/spec/ before implementation begins”
- “/trellis-before-dev”
Requirements
- Python 3
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Discover packages and their spec layers
- Identify which specs apply to your task based on
- Read the spec index for each relevant module
- Read the specific guideline files listed in the Pre-Development Checklist that are relevant
- Always read shared guides
- Understand the coding standards and patterns you need to follow, then proceed with your
What it can do on your machine
Read from SKILL.md and the folder at commit ec2bf56. 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:
python
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
Trellis Before Dev loads about 398 tokens when it runs. Until then it costs about 94 tokens; SKILL.md has 137 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 anjiemo/SunnyBeach at commit ec2bf56, republished under its Apache-2.0 licence (© anjiemo). 137 words, ~398 tokens.
Download SKILL.mdSave it as
.claude/skills/trellis-before-dev/SKILL.md (or your agent's skills folder).- name
- trellis-before-dev
- description
- Discovers and injects project-specific coding guidelines from .trellis/spec/ before implementation begins. Reads spec indexes, pre-development checklists, and shared thinking guides for the target package. Use when starting a new coding task, before writing any code, switching to a different package, or needing to refresh project conventions and standards.
Read the relevant development guidelines before starting your task.
Execute these steps:
Discover packages and their spec layers:
bash python ./.trellis/scripts/get_context.py --mode packagesIdentify which specs apply to your task based on:
- Which package you're modifying (e.g.,
cli/,docs-site/) - What type of work (backend, frontend, unit-test, docs, etc.)
- Which package you're modifying (e.g.,
Read the spec index for each relevant module:
bash cat .trellis/spec/<package>/<layer>/index.mdFollow the "Pre-Development Checklist" section in the index.
Read the specific guideline files listed in the Pre-Development Checklist that are relevant to your task. The index is NOT the goal — it points you to the actual guideline files (e.g.,
error-handling.md,conventions.md,mock-strategies.md). Read those files to understand the coding standards and patterns.Always read shared guides:
bash cat .trellis/spec/guides/index.mdUnderstand the coding standards and patterns you need to follow, then proceed with your development plan.
This step is mandatory before writing any code.
© anjiemo, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/trellis-before-dev of anjiemo/SunnyBeach.
Open the folder on GitHubat commit ec2bf56
Used in 8 other repositories
We found 39 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 8 other GitHub owners. This page covers the copy in anjiemo/SunnyBeach, which our catalogue first saw on October 7, 2026.
- ROYIANS/foliq-print-template-designer.agents/skills/trellis-before-dev.claude/skills/trellis-before-dev+1 more
- mindfold-ai/Trellis.pi/skills/trellis-before-dev.omp/skills/trellis-before-dev+4 more
- CharTyr/STS2-Agent.agents/skills/trellis-before-dev.cursor/skills/trellis-before-dev
- OrtonY/smart-resume.agents/skills/trellis-before-dev.claude/skills/trellis-before-dev
- we-used-to-be/Guanmo-open.agents/skills/trellis-before-dev
- Sisyphe42/ReignsAgent.agent/skills/trellis-before-dev.agents/skills/trellis-before-dev+4 more
- fy-agent/fyagent.agents/skills/trellis-before-dev.cursor/skills/trellis-before-dev
- majiayu000/claude-skill-registryskills/bash/trellis-before-devskills/bash/trellis-before-dev-ofoxai-skills+12 more
Compare with similar skills
Trellis Before Dev 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 |
|---|---|---|---|---|---|---|
| Trellis Before Dev this skillanjiemo/SunnyBeach | 178 | 8 repos | ~398 | Automated safety check: Pass | Apache-2.0 | |
| React Native Best Practicesvercel-labs/openreview | 1.7k | 17 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Swiftui Protwostraws/SwiftUI-Agent-Skill | 5.1k | 2 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Kortix Brandkortix-ai/suna | 20k | — | ~4k | Automated safety check: Pass | Custom licence | |
| Ip As LogoKartikLabhshetwar/better-shot | 2.4k | 1 repos | ~4.3k | Automated safety check: Pass | MIT | |
| Compose Multiplatform Patternsmonta-app/ocpp-emulator | 180 | 5 repos | ~2k | Automated safety check: Pass | Apache-2.0 |
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Trellis Update Spec
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Related
Categories
Questions about Trellis Before Dev
What does Trellis Before Dev do?
Discovers and injects project-specific coding guidelines from .trellis/spec/ before implementation begins. Trellis Before Dev is an agent skill from anjiemo/SunnyBeach.trellis/spec/ before implementation begins.
When should I use Trellis Before Dev?
Trellis Before Dev fits situations like: starting a new coding task; before writing any code; switching to a different package; needing to refresh project conventions and standards.
How do I install Trellis Before Dev in Claude Code?
Run `npx skills add anjiemo/SunnyBeach --skill trellis-before-dev -a claude-code`. Or copy the skill folder (.agents/skills/trellis-before-dev in anjiemo/SunnyBeach) into .claude/skills/trellis-before-dev in your project. Claude Code loads it when a task matches its description.
How do I install Trellis Before Dev in Codex?
Run `npx skills add anjiemo/SunnyBeach --skill trellis-before-dev -a codex`. Or copy the skill folder (.agents/skills/trellis-before-dev in anjiemo/SunnyBeach) into .agents/skills/trellis-before-dev in your project. Codex loads it when a task matches its description.
Can I use Trellis Before Dev 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 anjiemo/SunnyBeach --skill trellis-before-dev -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/trellis-before-dev, .gemini/skills/trellis-before-dev, .github/skills/trellis-before-dev and .opencode/skills/trellis-before-dev in your project.
What does Trellis Before Dev need to run?
Going by SKILL.md and its folder, Trellis Before Dev needs the command-line tools its instructions call (python). Our summary lists: Python 3.
Does Trellis Before Dev 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 Trellis Before Dev 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 Trellis Before Dev use?
Trellis Before Dev is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Trellis Before Dev use?
About 398 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Trellis Before Dev?
Skills that share tags, products or a category with Trellis Before Dev: React Native Best Practices (vercel-labs/openreview, 1.7k stars), Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.1k stars), Kortix Brand (kortix-ai/suna, 20k stars) and Ip As Logo (KartikLabhshetwar/better-shot, 2.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Trellis Before Dev?
anjiemo (a GitHub user) maintains it in anjiemo/SunnyBeach, which has 178 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on September 11, 2026.
Source: anjiemo/SunnyBeach on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.