JWT Handler

What it does

When your agent uses it

• Tasks that involve Authentication

Example prompts

• “/jwt-handler”

Requirements

• Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash

Workflow steps

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

1. 1Use asymmetric algorithms for public validation
2. 2Implement key rotation via JWKS
3. 3Validate all standard claims (iss, aud, exp)
4. 4Handle clock skew appropriately
5. 5Keep token payloads minimal
6. 6Never store sensitive data in JWTs

What it can do on your machine

Read from SKILL.md and the folder at commit 2d14a69. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Glob
  • Grep
  • Bash

  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 yaml).

  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

JWT Handler loads about 573 tokens when it runs. Until then it costs about 19 tokens; SKILL.md has 182 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~19

When it runs · the whole SKILL.md, loaded when a task matches

~573

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

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Write, Edit, Glob, Grep, Bash

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 majiayu000/claude-skill-registry at commit 2d14a69, republished under its MIT licence (© majiayu000). 182 words, ~573 tokens.

name

jwt-handler

description

JWT creation, validation, and management for SDK authentication

allowed-tools

Read, Write, Edit, Glob, Grep, Bash

graph.domains

domain:software-engineering

graph.specializations

specialization:sdk-platform-development

graph.skillAreas

skill-area:authentication-authorization, skill-area:api-clients-sdks

graph.roles

role:platform-engineer

graph.topics

topic:api-design, topic:developer-experience

skill:
  name: jwt-handler
  context:
    algorithm: RS256
    issuer: "https://api.example.com"
    audience: "api-users"
    expiration: "1h"
    refreshExpiration: "7d"
    jwksEndpoint: "/.well-known/jwks.json"
    keyRotation:
      enabled: true
      period: "30d"
    claims:
      - sub
      - email
      - roles

© majiayu000, 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 1 other file in skills/api/jwt-handler of majiayu000/claude-skill-registry.

• SKILL.md
• metadata.json

Open the folder on GitHubat commit 2d14a69

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 majiayu000/claude-skill-registry, which our catalogue first saw on October 7, 2026.

• a5c-ai/babysitterlibrary/specializations/sdk-platform-development/skills/jwt-handler