MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Function and module design for eserstack in TypeScript and Go.
Custom licenceAuto-check passed
Install Design Principles
$ npx skills add eser/stack --skill design-principles -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install eser/stack design-principles --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/eser/stack.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/design-principles .claude/skills/design-principles && 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 "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .claude/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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/eser/stack/tree/main/.agents/skills/design-principlesType 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 eser/stack --skill design-principles -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install eser/stack design-principles --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/eser/stack.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/design-principles .agents/skills/design-principles && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .agents/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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 eser/stack --skill design-principles -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install eser/stack design-principles --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/eser/stack.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/design-principles .cursor/skills/design-principles && 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 "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .cursor/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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/eser/stack.git --path .agents/skills/design-principles--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 eser/stack --skill design-principles -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install eser/stack design-principles --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/eser/stack.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/design-principles .gemini/skills/design-principles && 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 "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .gemini/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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 eser/stack design-principlesInstalls 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 eser/stack --skill design-principles -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/eser/stack.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/design-principles .github/skills/design-principles && 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 "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .github/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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 eser/stack --skill design-principles -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install eser/stack design-principles --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/eser/stack.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/design-principles .opencode/skills/design-principles && 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 "design-principles" agent skill from https://github.com/eser/stack/tree/main/.agents/skills/design-principles into .opencode/skills/design-principles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "design-principles", 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
design-principles- GitHub stars
- 128
- Token cost
- ~442 tokens
- SKILL.md length
- 148 words
- Files
- 3 (incl. references)
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Function and module design for eserstack in TypeScript and Go.
- Shaping signatures
- SKILL.md covers Always and References
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Design Principles is an agent skill from eser/stack. Function and module design for eserstack in TypeScript and Go. Covers pure functions with thin effectful wrappers, readonly data, small injected interfaces, plain data objects, one clock read, cancellation handles, collections by access pattern, and side-effect-free modules. Use when shaping signatures, modules, state or collections. Not for system layout (use architecture-guidelines).
Its SKILL.md is about 440 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/triggers.json` and `references/principles.md`).
It works with TypeScript. The repository describes itself as: The Portability Solution for Your Code! 🚀 Powered By Deno and JavaScript.
When your agent uses it
- Shaping signatures
Example prompts
- “/design-principles”
What it can do on your machine
Read from SKILL.md and the folder at commit 64939e6. 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
Design Principles loads about 442 tokens when it runs, and up to ~2.9k if it reads all its reference files. Until then it costs about 102 tokens; SKILL.md has 148 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 148 words (~442 tokens).
“How functions, modules, data and state are shaped. System structure lives in architecture-guidelines; code-level quality rules in coding-practices.”
- name
- design-principles
Files
SKILL.md and 2 other files (references) in .agents/skills/design-principles of eser/stack.
- SKILL.md
- evals/triggers.json
- references/principles.md
Open the folder on GitHubat commit 64939e6
Compare with similar skills
Design Principles 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 |
|---|---|---|---|---|---|---|
| Design Principles this skilleser/stack | 128 | — | ~442 | Automated safety check: Pass | Custom licence | |
| MCP Server Builderanthropics/skills | 180k | 64 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Builderanthropics/skills | 180k | 41 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 25 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 5 repos | ~1.2k | Automated safety check: Pass | MIT |
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More from eser/stack
All 13 skills in this repoEser Rules Manager
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Picks the skills a task needs and maintains the rules in .agents/skills.
Architecture Guidelines
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System design in eserstack: double-layered hexagonal architecture, explicit adapter composition, public API and CLI surface, request metadata, testing strategy, ADRs.
Coding Practices
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Language-neutral code quality rules for eserstack, TypeScript and Go.
Enrichment
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Interviews the user about a plan, decision or idea in rounds, level by level down a decision tree, until both share one understanding; facts are researched by sub-agents, decisions stay with the user.
Go Practices
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Go conventions for eserstack's ajan framework, services and FFI bridge.
Javascript Practices
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Related
Works with
Questions about Design Principles
What does Design Principles do?
Function and module design for eserstack in TypeScript and Go. Design Principles is an agent skill from eser/stack. Function and module design for eserstack in TypeScript and Go.
When should I use Design Principles?
Design Principles fits situations like: shaping signatures.
How do I install Design Principles in Claude Code?
Run `npx skills add eser/stack --skill design-principles -a claude-code`. Or copy the skill folder (.agents/skills/design-principles in eser/stack) into .claude/skills/design-principles in your project. Claude Code loads it when a task matches its description.
How do I install Design Principles in Codex?
Run `npx skills add eser/stack --skill design-principles -a codex`. Or copy the skill folder (.agents/skills/design-principles in eser/stack) into .agents/skills/design-principles in your project. Codex loads it when a task matches its description.
Can I use Design Principles 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 eser/stack --skill design-principles -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/design-principles, .gemini/skills/design-principles, .github/skills/design-principles and .opencode/skills/design-principles in your project.
What does Design Principles need to run?
SKILL.md names no scripts, command-line tools or credentials: Design Principles is instructions for the agent only.
Does Design Principles 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 Design Principles 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 Design Principles use?
Design Principles 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 Design Principles use?
About 442 tokens (SKILL.md is roughly 1.8k 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 2.4k tokens, read only when the agent opens those files.
What are the alternatives to Design Principles?
Skills that share tags, products or a category with Design Principles: MCP Server Builder (anthropics/skills, 180k stars), Web Artifacts Builder (anthropics/skills, 180k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Design Principles?
eser (a GitHub user) maintains it in eser/stack, which has 128 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on October 3, 2026.
Source: eser/stack on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.