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Agent skill

Gjc SDK Author

by Yeachan-Heo in Yeachan-Heo/gajae-code

Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI.

MITAuto-check passedAgent Workflows

Install Gjc SDK Author

skills CLI
$ npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-author -a claude-code

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

GitHub CLI
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-author --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/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .claude/skills && cp -r skills-src/sdk-skills/gjc-sdk-author .claude/skills/gjc-sdk-author && 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
gjc-sdk-author
GitHub stars
2.9k
Token cost
~696 tokens
SKILL.md length
350 words
Files
3
Skills in repo
9
Repo updated
First seen
Licence
MIT

At a glance

Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI.

  • Agent Workflows work in your project
  • Runs Python and TypeScript scripts from its folder

What it does

Gjc SDK Author is an agent skill from Yeachan-Heo/gajae-code. Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI.

Its SKILL.md is about 700 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `templates/direct-sdk.py` and `templates/direct-sdk.ts`).

It sits in Agent Workflows. It works with Python and TypeScript. The licence is MIT.

When your agent uses it

  • Agent Workflows work in your project

Example prompts

  • “/gjc-sdk-author”

Requirements

  • Python 3
  • Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit 91fe978. 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

    Ships script files (Python and TypeScript), which the agent can run.

    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

Gjc SDK Author loads about 696 tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 350 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~30
When it runs · the whole SKILL.md, loaded when a task matches
~696

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 Yeachan-Heo/gajae-code at commit 91fe978, republished under its MIT licence (© Yeachan-Heo). 350 words, ~696 tokens.

Download SKILL.mdSave it as .claude/skills/gjc-sdk-author/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
gjc-sdk-author
description
Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI.

Author broker-bound GJC session scripts

Start from the owned templates in this skill directory:

  • templates/direct-sdk.ts
  • templates/direct-sdk.py

Authoring contract

  • Invoke the documented gjc sdk session CLI as a child process. It routes live controls through SessionRouter and lifecycle mutations through SessionLifecycleService and the Broker.
  • Require explicit repository and session-ID inputs. Run the CLI with the repository as its working directory; do not infer a session from local state.
  • Never scan .gjc/state/sdk, parse endpoint records, read endpoint credentials, or open a raw per-session WebSocket.
  • Use only gjc sdk session raw query <sessionId> --query <query> --json for fixed inspection queries and gjc sdk session raw control <sessionId> --op <operation> --json-input <object> --confirm --json for fixed controls. Raw leaves do not accept --repo; preserve the selected repository as subprocess cwd instead.
  • Pass CLI arguments as an argv array, never through a shell command string.
  • Keep query and control operation names on fixed allowlists. Reject secret-shaped input fields before dispatch.
  • Require an immediately preceding, single-use human approval before every mutation.
  • Use the template's nonce-bearing operation/session/input-bound standard-input challenge; never replace it with a free boolean or reusable approval.
  • Send no CLI request after denial or cancellation.
  • Bind durable workflow controls to the expected session ID.
  • Request --json explicitly: successful session JSON is unchanged, but default ordinary failures are text on stderr. Parse stdout even on nonzero exit. Preserve the trusted CLI's bounded gjc.command-error version 1 envelope, including outcome certainty, exact references, evidence availability and continuation; do not redact an idempotency reference merely because its kind contains “key”. Keep malformed/unstructured responses generic and never render raw CLI stderr or credentials. Inspection may report independent query failures alongside successes; it must not discard structured reconciliation evidence. No failure authorizes blind replay or automatic recovery.
  • Keep broader lifecycle orchestration behind gjc sdk session raw global with a stable idempotency key or an SDK-core lifecycle facade; the canonical templates do not invent lifecycle routing.
  • State that approval is a trusted-local procedural safeguard, not capability isolation; Broker and Router retain attachment authority.
Show full SKILL.md (19 more words)Show less

Generated user scripts belong in the user's workspace. Only the two canonical templates are owned by this clean-generated bundle.

© Yeachan-Heo, 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 2 other files in sdk-skills/gjc-sdk-author of Yeachan-Heo/gajae-code.

  • SKILL.md
  • templates/direct-sdk.py
  • templates/direct-sdk.ts

Open the folder on GitHubat commit 91fe978

Compare with similar skills

Gjc SDK Author 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.

Gjc SDK Author compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gjc SDK Author this skillYeachan-Heo/gajae-code2.9k—~696Automated safety check: PassMIT
MCP Server Builderanthropics/skills180k63 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k4 repos~1.2kAutomated safety check: PassMIT
Create MCP Serversglittercowboy/taches-cc-resources2k—~1.5kAutomated safety check: PassMIT
MCP BuilderLeastBit/Claude_skills_zh-CN590—~1.2kAutomated safety check: PassApache-2.0
Build MCP Serverbobmatnyc/claude-mpm156—~2kAutomated safety check: PassApache-2.0

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Works with

Categories

Questions about Gjc SDK Author

What does Gjc SDK Author do?

Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI. Gjc SDK Author is an agent skill from Yeachan-Heo/gajae-code. Author trusted-local TypeScript and Python scripts that operate GJC sessions through the broker-bound CLI.

When should I use Gjc SDK Author?

Gjc SDK Author fits situations like: agent Workflows work in your project.

How do I install Gjc SDK Author in Claude Code?

Run `npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-author -a claude-code`. Or copy the skill folder (sdk-skills/gjc-sdk-author in Yeachan-Heo/gajae-code) into .claude/skills/gjc-sdk-author in your project. Claude Code loads it when a task matches its description.

How do I install Gjc SDK Author in Codex?

Run `npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-author -a codex`. Or copy the skill folder (sdk-skills/gjc-sdk-author in Yeachan-Heo/gajae-code) into .agents/skills/gjc-sdk-author in your project. Codex loads it when a task matches its description.

Can I use Gjc SDK Author 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 Yeachan-Heo/gajae-code --skill gjc-sdk-author -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gjc-sdk-author, .gemini/skills/gjc-sdk-author, .github/skills/gjc-sdk-author and .opencode/skills/gjc-sdk-author in your project.

What does Gjc SDK Author need to run?

Going by SKILL.md and its folder, Gjc SDK Author needs Python and TypeScript for the scripts in its folder. Our summary lists: Python 3; Node.js.

Does Gjc SDK Author 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 Gjc SDK Author 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 Gjc SDK Author use?

Gjc SDK Author 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 Gjc SDK Author use?

About 696 tokens (SKILL.md is roughly 2.8k 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 Gjc SDK Author?

Skills that share tags, products or a category with Gjc SDK Author: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), Create MCP Servers (glittercowboy/taches-cc-resources, 2k stars) and MCP Builder (LeastBit/Claude_skills_zh-CN, 590 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gjc SDK Author?

Yeachan-Heo (a GitHub user) maintains it in Yeachan-Heo/gajae-code, which has 2,937 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on October 10, 2026.

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