AWS Serverless Eda
zxkane/aws-skills
AWS serverless and event-driven architecture expert based on Well-Architected Framework.
Twelve-Factor App patterns for software-as-a-service and long-running process applications.
Install Twelve Factor
$ npx skills add citypaul/.dotfiles --skill twelve-factor -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install citypaul/.dotfiles twelve-factor --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/citypaul/.dotfiles.git skills-src && mkdir -p .claude/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .claude/skills/twelve-factor && 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 "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .claude/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factorType 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 citypaul/.dotfiles --skill twelve-factor -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install citypaul/.dotfiles twelve-factor --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/citypaul/.dotfiles.git skills-src && mkdir -p .agents/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .agents/skills/twelve-factor && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .agents/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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 citypaul/.dotfiles --skill twelve-factor -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install citypaul/.dotfiles twelve-factor --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/citypaul/.dotfiles.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .cursor/skills/twelve-factor && 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 "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .cursor/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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/citypaul/.dotfiles.git --path claude/.claude/skills/twelve-factor--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 citypaul/.dotfiles --skill twelve-factor -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install citypaul/.dotfiles twelve-factor --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/citypaul/.dotfiles.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .gemini/skills/twelve-factor && 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 "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .gemini/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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 citypaul/.dotfiles twelve-factorInstalls 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 citypaul/.dotfiles --skill twelve-factor -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/citypaul/.dotfiles.git skills-src && mkdir -p .github/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .github/skills/twelve-factor && 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 "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .github/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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 citypaul/.dotfiles --skill twelve-factor -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install citypaul/.dotfiles twelve-factor --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/citypaul/.dotfiles.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/claude/.claude/skills/twelve-factor .opencode/skills/twelve-factor && 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 "twelve-factor" agent skill from https://github.com/citypaul/.dotfiles/tree/main/claude/.claude/skills/twelve-factor into .opencode/skills/twelve-factor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "twelve-factor", 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
twelve-factor- GitHub stars
- 740
- Token cost
- ~4.4k tokens
- SKILL.md length
- 2,203 words
- Files
- 2
- Skills in repo
- 44
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Twelve-Factor App patterns for software-as-a-service and long-running process applications.
- Works in 5 steps: Config (Factor III) — add env var… → Logs (Factor XI) — switch to structured… → Disposability (Factor IX) — add graceful… → …
- Configuring deploy-time environment
- SKILL.md covers When to Apply, Codebase (Factor I), Config (Factor III) and Dependencies (Factor II), plus 11 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Twelve Factor is an agent skill from citypaul/.dotfiles. Twelve-Factor App patterns for software-as-a-service and long-running process applications. Use when configuring deploy-time environment, backing services, process startup/shutdown, or operational parity. Apply individual principles to frontends, serverless functions, and CLIs only where their runtime and platform make them relevant.
Its SKILL.md is about 4.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `resources/node-patterns.md`).
It sits in Backend & APIs, covering Serverless. It works with TypeScript.
When your agent uses it
- Configuring deploy-time environment
- Backing services
- Process startup/shutdown
- Operational parity
Example prompts
- “/twelve-factor”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Config (Factor III) — add env var validation without restructuring
- Logs (Factor XI) — switch to structured process-stream logging
- Disposability (Factor IX) — add graceful shutdown handlers
- Backing services (Factor IV) — inject platform-appropriate resource bindings
- Stateless processes (Factor VI) — migrate in-memory state to backing services
What it can do on your machine
Read from SKILL.md and the folder at commit cd4028d. 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 (its code samples are typescript).
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):
12factor.net
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
Twelve Factor loads about 4.4k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 2,203 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:49
real credential, and never a committed `.env`. A validation schema tells the process what is wrong at boot; it does not - NoteMentions a .env fileSKILL.md:242
only, no real credentials, no committed `.env`)
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 2,203 words (~4,367 tokens).
“The original methodology targets software-as-a-service applications. Its principles can inform other deployables, but port binding, concurrency, process disposability, runtime config, and artifact parity do not map literally to every frontend, serverless function, or CLI.”
- name
- twelve-factor
Files
SKILL.md and 1 other file in claude/.claude/skills/twelve-factor of citypaul/.dotfiles.
- SKILL.md
- resources/node-patterns.md
Open the folder on GitHubat commit cd4028d
Compare with similar skills
Twelve Factor 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 |
|---|---|---|---|---|---|---|
| Twelve Factor this skillcitypaul/.dotfiles | 740 | — | ~4.4k | Automated safety check: Notes | Custom licence | |
| AWS Serverless Edazxkane/aws-skills | 367 | 4 repos | ~3.2k | Automated safety check: Pass | MIT | |
| Qstash JSupstash/qstash-js | 269 | — | ~746 | Automated safety check: Pass | MIT | |
| Dce Edgevercel/next.js | 143k | — | ~1k | Automated safety check: Pass | MIT | |
| AWS Lambda Durable Functionsawslabs/agent-plugins | 916 | — | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| AWS Lambda Typescript Integrationgiuseppe-trisciuoglio/developer-kit | 357 | — | ~2.9k | Automated safety check: Notes | MIT |
Similar skills
- Official
Qstash JS
upstash/qstash-js
Work with the QStash JavaScript/TypeScript SDK for serverless messaging, scheduling.
- Official
Dce Edge
vercel/next.js
DCE-safe require() patterns and edge runtime constraints. An agent skill from vercel/next.js.
- Official
AWS Lambda Durable Functions
awslabs/agent-plugins
Build resilient, long-running, multi-step applications with AWS Lambda durable functions with automatic state persistence, retry logic, and orchestration for long-running executions.
AWS Lambda Typescript Integration
giuseppe-trisciuoglio/developer-kit
Provides AWS Lambda integration patterns for TypeScript with cold start optimization.
Cloudflare Workers
einverne/dotfiles
Comprehensive guide for building serverless applications with Cloudflare Workers.
More from citypaul/.dotfiles
All 44 skills in this repoFind Skills
citypaul/.dotfiles
Discover and, with authorization, install agent skills from the open skills ecosystem.
Render Code Shape
citypaul/.dotfiles
Render the shape of code — module boundaries, the types that cross them, signatures, and a cited call graph — for code that already exists or a change about to be built.
Structure Codebase
citypaul/.dotfiles
Design, audit, and evolve physical source and package structures that expose real architectural boundaries while keeping related behavior together.
Test Design Reviewer
citypaul/.dotfiles
Review test quality using Dave Farley's eight properties of good tests.
Characterisation Tests
citypaul/.dotfiles
A skill your agent uses when modifying existing code that lacks tests and you need to document its actual current behavior before making changes -- the legacy code dilemma where you need tests to…
CI Debugging
citypaul/.dotfiles
Systematic CI/CD failure diagnosis using hypothesis-first investigation, local reproduction, and environment delta analysis.
Related
Works with
Categories
Questions about Twelve Factor
What does Twelve Factor do?
Twelve-Factor App patterns for software-as-a-service and long-running process applications. dotfiles. Twelve-Factor App patterns for software-as-a-service and long-running process applications.
When should I use Twelve Factor?
Twelve Factor fits situations like: configuring deploy-time environment; backing services; process startup/shutdown; operational parity.
How do I install Twelve Factor in Claude Code?
Run `npx skills add citypaul/.dotfiles --skill twelve-factor -a claude-code`. Or copy the skill folder (claude/.claude/skills/twelve-factor in citypaul/.dotfiles) into .claude/skills/twelve-factor in your project. Claude Code loads it when a task matches its description.
How do I install Twelve Factor in Codex?
Run `npx skills add citypaul/.dotfiles --skill twelve-factor -a codex`. Or copy the skill folder (claude/.claude/skills/twelve-factor in citypaul/.dotfiles) into .agents/skills/twelve-factor in your project. Codex loads it when a task matches its description.
Can I use Twelve Factor 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 citypaul/.dotfiles --skill twelve-factor -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/twelve-factor, .gemini/skills/twelve-factor, .github/skills/twelve-factor and .opencode/skills/twelve-factor in your project.
What does Twelve Factor need to run?
SKILL.md names no scripts, command-line tools or credentials: Twelve Factor is instructions for the agent only.
Does Twelve Factor access the network?
SKILL.md names 1 domain. As links in the text: 12factor.net. This is read from the text; nothing was executed.
Is Twelve Factor safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Twelve Factor use?
Twelve Factor 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 Twelve Factor use?
About 4.4k tokens (SKILL.md is roughly 17k 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 Twelve Factor?
Skills that share tags, products or a category with Twelve Factor: AWS Serverless Eda (zxkane/aws-skills, 367 stars), Qstash JS (upstash/qstash-js, 269 stars), Dce Edge (vercel/next.js, 143k stars) and AWS Lambda Durable Functions (awslabs/agent-plugins, 916 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Twelve Factor?
citypaul (a GitHub user) maintains it in citypaul/.dotfiles, which has 740 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 9, 2026.
Source: citypaul/.dotfiles on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.