New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Faasjs Specs

by faasjs in faasjs/faasjs

A skill your agent uses when implementing, reviewing, or verifying normative FaasJS runtime behavior and compatibility for faas.yaml, staged config discovery and merge order, zero-mapping route…

MITAuto-check passedBackend & APIs

Install Faasjs Specs

skills CLI
$ npx skills add faasjs/faasjs --skill faasjs-specs -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install faasjs/faasjs faasjs-specs --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/faasjs/faasjs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/faasjs-specs .claude/skills/faasjs-specs && rm -rf skills-src

Use ~/.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/

Facts

Skill name
faasjs-specs
GitHub stars
121
Token cost
~444 tokens
SKILL.md length
164 words
Files
5 (incl. references)
Skills in repo
8
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when implementing, reviewing, or verifying normative FaasJS runtime behavior and compatibility for faas.yaml, staged config discovery and merge order, zero-mapping route…

  • Works in 4 steps: Load the relevant spec before changing… → Treat MUST/SHOULD/MAY language as… → Keep implementation, docs, and tests… → …
  • Verifying normative FaasJS runtime behavior and compatibility for faas.yaml
  • SKILL.md covers Default Workflow, Load These References, Gotchas and Validation
  • Calls npm

What it does

Faasjs Specs is an agent skill from faasjs/faasjs. Use when implementing, reviewing, or verifying normative FaasJS runtime behavior and compatibility for faas.yaml, staged config discovery and merge order, zero-mapping route resolution, HTTP request/response protocol envelopes, status behavior, plugin identity, concurrent mount and failed-mount retry behavior, lifecycle execution, config layering, and config-driven plugin loading.

Its SKILL.md is about 440 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `references/specs/faas-yaml.md`, `references/specs/http-protocol.md` and `references/specs/plugin.md`).

It sits in Backend & APIs, covering Serverless. The repository describes itself as: 🚀 FaasJS is an agent-friendly full-stack TypeScript framework for building predictable, type-safe applications with minimal dependencies. The licence is MIT.

When your agent uses it

  • Verifying normative FaasJS runtime behavior and compatibility for faas.yaml
  • Staged config discovery and merge order
  • Zero-mapping route resolution
  • HTTP request/response protocol envelopes

Example prompts

  • “/faasjs-specs”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Load the relevant spec before changing runtime behavior or public documentation.
  2. Treat MUST/SHOULD/MAY language as normative.
  3. Keep implementation, docs, and tests aligned with the spec.
  4. Preserve backwards compatibility unless the change is intentionally breaking and documented.

What it can do on your machine

Read from SKILL.md and the folder at commit 8136384. 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:

    • npm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

    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

Faasjs Specs loads about 444 tokens when it runs, and up to ~5.2k if it reads all its reference files. Until then it costs about 99 tokens; SKILL.md has 164 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~99
When it runs · the whole SKILL.md, loaded when a task matches
~444
With references · SKILL.md plus every file in references/, read only if the agent opens them
~5.2k

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 faasjs/faasjs at commit 8136384, republished under its MIT licence (© faasjs). 164 words, ~444 tokens.

Download SKILL.mdSave it as .claude/skills/faasjs-specs/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
faasjs-specs
description
Use when implementing, reviewing, or verifying normative FaasJS runtime behavior and compatibility for faas.yaml, staged config discovery and merge order, zero-mapping route resolution, HTTP request/response protocol envelopes, status behavior, plugin identity, concurrent mount and failed-mount retry behavior, lifecycle execution, config layering, and config-driven plugin loading.

FaasJS Specifications

Default Workflow

  1. Load the relevant spec before changing runtime behavior or public documentation.
  2. Treat MUST/SHOULD/MAY language as normative.
  3. Keep implementation, docs, and tests aligned with the spec.
  4. Preserve backwards compatibility unless the change is intentionally breaking and documented.

Load These References

  • faas.yaml placement, discovery, merge order, staging keys, server node, plugins node, and YAML subset: references/specs/faas-yaml.md.
  • Zero-mapping file naming and route lookup order: references/specs/routing-mapping.md.
  • HTTP request, response envelope, status, and transport behavior: references/specs/http-protocol.md.
  • Plugin identity, lifecycle execution, config layering, manual registration, and config-driven loading: references/specs/plugin.md.

Gotchas

  • Specs are normative and may be stricter than general guides.
  • Route behavior and config merge order are compatibility-sensitive.
  • HTTP response behavior must preserve envelope and low-level error distinctions.
  • Plugin config precedence must stay aligned with both manual and config-driven loading.

Validation

  • Run targeted runtime tests for the spec area changed.
  • Run npm run doc after spec source edits.
  • Run cd docs && npm run build when docs routing, spec pages, or links change.

© faasjs, 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 4 other files (references) in skills/faasjs-specs of faasjs/faasjs.

  • SKILL.md
  • references/specs/faas-yaml.md
  • references/specs/http-protocol.md
  • references/specs/plugin.md
  • references/specs/routing-mapping.md

Open the folder on GitHubat commit 8136384

Compare with similar skills

Faasjs Specs 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.

Faasjs Specs compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Faasjs Specs this skillfaasjs/faasjs121—~444Automated safety check: PassMIT
Arcgis To Portaljsdatopian/portaljs2.4k1 repos~2kAutomated safety check: PassMIT
AWS Serverless Edazxkane/aws-skills3674 repos~3.2kAutomated safety check: PassMIT
AI Model NodejsTencentCloudBase/CloudBase-AI-Toolkit1.1k3 repos~5kAutomated safety check: PassMIT
Qstash JSupstash/qstash-js2691 repos~746Automated safety check: PassMIT
NubaseOtterMind/Nubase623—~2.2kAutomated safety check: NotesApache-2.0

Similar skills

  • Arcgis To Portaljs

    datopian/portaljs

    Migrate a whole ArcGIS Hub site into a PortalJS Arc portal end-to-end.

    2.4k GitHub starsUsed in 1 repo~2k tokens
    Backend & APIsAuto-check passed

  • AWS Serverless Eda

    zxkane/aws-skills

    AWS serverless and event-driven architecture expert based on Well-Architected Framework.

    367 GitHub starsUsed in 4 repos~3.2k tokens
    Backend & APIsAuto-check passed

  • AI Model Nodejs

    TencentCloudBase/CloudBase-AI-Toolkit

    A skill your agent uses for Node.js backend AI via @cloudbase/node-sdk (=3.16.0) — cloud functions, CloudRun, Express/Koa/NestJS, serverless APIs, scheduled jobs, LLM proxies, agent orchestration.

    1.1k GitHub starsUsed in 3 repos~5k tokens
    Backend & APIsAuto-check passed

  • Qstash JS

    upstash/qstash-js

    Official

    Work with the QStash JavaScript/TypeScript SDK for serverless messaging, scheduling.

    269 GitHub starsUsed in 1 repo~746 tokens
    Backend & APIsAuto-check passed

  • Nubase

    OtterMind/Nubase

    A skill your agent uses when the user mentions Nubase broadly, wants a backend for an AI-generated app, or needs to deploy/publish generated code online — across Database, Auth, Storage, Assets…

    623 GitHub stars~2.2k tokensUpdated 9 days ago
    Backend & APIsAuto-check: notes

  • Tianji Worker Operations

    msgbyte/tianji

    Operates Tianji Workers: create, test, deploy, invoke, schedule, pause and roll back them, plus manage their environment variables and shared modules.

    3.1k GitHub stars~1.1k tokensUpdated today
    Backend & APIsAuto-check passed

More from faasjs/faasjs

All 8 skills in this repo

  • Faasjs API Jobs

    faasjs/faasjs

    A skill your agent uses when building or reviewing FaasJS backend APIs and jobs: .api.ts files, defineApi, zod params schemas, HttpError, HTTP helpers, middleware/staticHandler, .job.ts files…

    121 GitHub stars~653 tokensUpdated 1 mo ago
    Auto-check passed

  • Faasjs Pg

    faasjs/faasjs

    A skill your agent uses when working with @faasjs/pg or PostgreSQL in FaasJS: Tables declaration merging, QueryBuilder, select aliases, parameterized sql expressions, raw SQL, numeric/decimal/bigint…

    121 GitHub stars~718 tokensUpdated 1 mo ago
    Auto-check passed

  • Faasjs Plugins Runtime

    faasjs/faasjs

    A skill your agent uses when building or reviewing FaasJS plugins and runtime infrastructure: Plugin lifecycle hooks including concurrent mount and failed-mount retry behavior, InvokeData mutation…

    121 GitHub stars~500 tokensUpdated 1 mo ago
    Auto-check: notes

  • Faasjs Project Workflow

    faasjs/faasjs

    A skill your agent uses when creating, configuring, reviewing, or onboarding a FaasJS project; working with create-faas-app, vp CLI, TypeScript or Vite config, feature folders, file and naming…

    121 GitHub stars~577 tokensUpdated 1 mo ago
    Auto-check passed

  • Faasjs React Ant Design

    faasjs/faasjs

    A skill your agent uses when building or reviewing FaasJS React UI, especially @faasjs/ant-design pages, useFaas, useFaasStream, faas requests, CRUD screens, Table faasData, Description faasData…

    121 GitHub stars~693 tokensUpdated 1 mo ago
    Auto-check passed

  • Faasjs Best Practices

    faasjs/faasjs

    A skill your agent uses when working in any FaasJS repo and no narrower FaasJS skill is already selected, or when a task spans project conventions, validation gates, security boundaries, and…

    121 GitHub stars~741 tokensUpdated 1 mo ago
    Auto-check passed

Categories

Questions about Faasjs Specs

What does Faasjs Specs do?

A skill your agent uses when implementing, reviewing, or verifying normative FaasJS runtime behavior and compatibility for faas.yaml, staged config discovery and merge order, zero-mapping route…. Faasjs Specs is an agent skill from faasjs/faasjs.yaml, staged config discovery and merge order, zero-mapping route resolution, HTTP request/response protocol envelopes, status behavior, plugin identity, concurrent mount and failed-mount retry behavior, lifecycle execution, config layering, and config-driven plugin loading.

When should I use Faasjs Specs?

Faasjs Specs fits situations like: verifying normative FaasJS runtime behavior and compatibility for faas.yaml; staged config discovery and merge order; zero-mapping route resolution; HTTP request/response protocol envelopes.

How do I install Faasjs Specs in Claude Code?

Run `npx skills add faasjs/faasjs --skill faasjs-specs -a claude-code`. Or copy the skill folder (skills/faasjs-specs in faasjs/faasjs) into .claude/skills/faasjs-specs in your project. Claude Code loads it when a task matches its description.

How do I install Faasjs Specs in Codex?

Run `npx skills add faasjs/faasjs --skill faasjs-specs -a codex`. Or copy the skill folder (skills/faasjs-specs in faasjs/faasjs) into .agents/skills/faasjs-specs in your project. Codex loads it when a task matches its description.

Can I use Faasjs Specs 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 faasjs/faasjs --skill faasjs-specs -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/faasjs-specs, .gemini/skills/faasjs-specs, .github/skills/faasjs-specs and .opencode/skills/faasjs-specs in your project.

What does Faasjs Specs need to run?

Going by SKILL.md and its folder, Faasjs Specs needs the command-line tools its instructions call (npm).

Does Faasjs Specs access the network?

SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Faasjs Specs 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 Faasjs Specs use?

Faasjs Specs 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 Faasjs Specs use?

About 444 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 4.8k tokens, read only when the agent opens those files.

What are the alternatives to Faasjs Specs?

Skills that share tags, products or a category with Faasjs Specs: Arcgis To Portaljs (datopian/portaljs, 2.4k stars), AWS Serverless Eda (zxkane/aws-skills, 367 stars), AI Model Nodejs (TencentCloudBase/CloudBase-AI-Toolkit, 1.1k stars) and Qstash JS (upstash/qstash-js, 269 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Faasjs Specs?

faasjs (a GitHub organization) maintains it in faasjs/faasjs, which has 121 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on September 3, 2026.

Source: faasjs/faasjs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.