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Agent skill

Gjc SDK Session

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

Operate GJC SDK sessions from the CLI (gjc sdk session list|inspect|send|status|tail|close|raw plus the explicit raw control|query|global hatch).

MITAuto-check passedAgent Workflows

Install Gjc SDK Session

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

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

GitHub CLI
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-session --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/plugins/gajae-code/skills/gjc-sdk-session .claude/skills/gjc-sdk-session && 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-session
GitHub stars
2.9k
Token cost
~1.2k tokens
SKILL.md length
598 words
Files
1
Skills in repo
9
Repo updated
First seen
Licence
MIT

At a glance

Operate GJC SDK sessions from the CLI (gjc sdk session list|inspect|send|status|tail|close|raw plus the explicit raw control|query|global hatch).

  • Agent Workflows work in your project
  • SKILL.md covers Broker authority, Semantic verbs, Raw hatch and Lossless prompt results, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Gjc SDK Session is an agent skill from Yeachan-Heo/gajae-code. Operate GJC SDK sessions from the CLI (gjc sdk session list|inspect|send|status|tail|close|raw plus the explicit raw control|query|global hatch). Advisory reference: broker-bound, credential-free output; mutating verbs run only when explicitly invoked.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows. The licence is MIT.

When your agent uses it

  • Agent Workflows work in your project

Example prompts

  • “/gjc-sdk-session”

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

    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

Gjc SDK Session loads about 1.2k tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 598 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~68
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

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 Yeachan-Heo/gajae-code at commit 91fe978, republished under its MIT licence (© Yeachan-Heo). 598 words, ~1,194 tokens.

Download SKILL.mdSave it as .claude/skills/gjc-sdk-session/SKILL.md (or your agent's skills folder).
name
gjc-sdk-session
description
Operate GJC SDK sessions from the CLI (`gjc sdk session list|inspect|send|status|tail|close|raw` plus the explicit raw control|query|global hatch). Advisory reference: broker-bound, credential-free output; mutating verbs run only when explicitly invoked.

GJC SDK session CLI (advisory)

Advisory reference for interacting with live GJC SDK sessions through the broker-bound gjc sdk session command family. This skill is informational: it never prints endpoint credentials or changes configuration, and it never references removed command routes. Mutating commands are only documented and run when the operator explicitly invokes them.

Broker authority

list, inspect, send, status, tail, and close resolve sessions through the SDK broker. The broker validates the indexed session against its durable endpoint record and hands the CLI a connection credential the CLI uses and never prints. --agent-dir selects the broker state directory.

Semantic verbs

  • gjc sdk session list — broker session.list projected to the versioned, credential-free row DTO (session id, locator, pid, liveness, tombstone, activity, heartbeat, identity provenance, ambiguity).

  • gjc sdk session inspect <sessionId> — one indexed row from the broker. It never reads endpoint discovery records directly: a missing or unavailable broker fails closed rather than exposing endpoint authority outside SDK core.

  • gjc sdk session send <sessionId> --text <prompt> — ordered turn.prompt carrying a caller-chosen operation reference (ULID). --wait polls turn.result with kind: "prompt" until terminal or the wait window elapses; it never cancels a running turn.

  • gjc sdk session status <sessionId> <opRef> — lossless turn.result with kind: "prompt" for a previously submitted operation reference.

  • gjc sdk session close <sessionId> — closes the current live host generation through the broker without attaching. The default idempotency key includes the endpoint generation and incarnation, so retries for one host replay while a resumed host with the same session id gets a new lifecycle identity.

  • gjc sdk session tail <sessionId> — retained transcript replay from the durable checkpoint followed by live event-ring frames. --strict fails closed on retention gaps, --until-idle exits at a terminal turn state, --all-events widens the emitted event kinds, and --cursor resumes from a saved checkpoint token that is re-minted per connection.

Raw hatch

gjc sdk session raw control|query|global dispatches one SDK operation with --op (control/global) or --query (query) plus a JSON input source. Lifecycle globals require --idempotency-key; destructive control operations accept --confirm. Endpoint-disclosure operations are refused by default and stay refused by this skill.

Show full SKILL.md (251 more words)Show less

Lossless prompt results

turn.result with kind: "prompt" reports accepted, in_flight, terminal_ok, or failed; only retained-record eviction yields unknown, which means uncertainty, never proof of non-execution. turn.prompt_status remains a legacy prompt-only alias. Never reuse an operation reference as a retry mechanism.

Checkpoint gaps

tail reports a retention_gap with the missing sequence range and a resync checkpoint when retained history or the event ring dropped entries; --strict turns any gap into exit code 1.

gjc sdk search [--scope repo|pwd|global] [--json] lists broker-visible sessions inside one exact scope (default repo: the identical canonical Git worktree, never a path prefix). Every result carries a scope/status envelope (requested and resolved scope, populated, empty, not-in-git-worktree, or unavailable); empty and non-Git results exit 0 and never fall back to a wider scope. Rows are probed after scoping (reachable, unreachable, stale) without printing endpoint credentials.

Local-only spawn

gjc sdk spawn --cwd <dir> --prompt <task> [--model <selector>] [--profile <name>] creates one task-seeded background child through the broker and is legal only inside a live interactive gjc --master session. Each invocation uses a fresh idempotency identity: one identity yields at most one child and one seed prompt, replays return stored outcomes, and a semantically new task requires a new invocation. spawn_in_progress and terminal_uncertain are honest states, never retry triggers. The task and master capability never persist in broker state, logs, or output; spawn is prohibited on MCP, ACP, daemon CLI/raw, Telegram, Discord, and Slack surfaces. Clean up children through the standard session.close path; orphaned children are reaped after sdk.masterOrphanGraceMs.

© 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

Just SKILL.md in plugins/gajae-code/skills/gjc-sdk-session of Yeachan-Heo/gajae-code.

Open the folder on GitHubat commit 91fe978

Compare with similar skills

Gjc SDK Session 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 Session compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gjc SDK Session this skillYeachan-Heo/gajae-code2.9k—~1.2kAutomated safety check: PassMIT
MCP Server Builderanthropics/skills180k63 repos~2.3kAutomated safety check: PassApache-2.0
Hook Development for Claude Code Pluginsanthropics/claude-plugins-official38k10 repos~4.1kAutomated safety check: NotesApache-2.0
Using Superpowersfarm-fe/farm5.6k35 repos~1.4kAutomated safety check: PassMIT
Executing Plans Inlineobra/superpowers297k2 repos~5.1kAutomated safety check: PassMIT
Skill CreatorAzure/azqr79689 repos~8.2kAutomated safety check: PassApache-2.0

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Categories

Questions about Gjc SDK Session

What does Gjc SDK Session do?

Operate GJC SDK sessions from the CLI (gjc sdk session list|inspect|send|status|tail|close|raw plus the explicit raw control|query|global hatch). Gjc SDK Session is an agent skill from Yeachan-Heo/gajae-code. Operate GJC SDK sessions from the CLI (gjc sdk session list|inspect|send|status|tail|close|raw plus the explicit raw control|query|global hatch).

When should I use Gjc SDK Session?

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

How do I install Gjc SDK Session in Claude Code?

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

How do I install Gjc SDK Session in Codex?

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

Can I use Gjc SDK Session 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-session -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-session, .gemini/skills/gjc-sdk-session, .github/skills/gjc-sdk-session and .opencode/skills/gjc-sdk-session in your project.

What does Gjc SDK Session need to run?

SKILL.md names no scripts, command-line tools or credentials: Gjc SDK Session is instructions for the agent only.

Does Gjc SDK Session 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 Session 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 Session use?

Gjc SDK Session 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 Session use?

About 1.2k tokens (SKILL.md is roughly 4.8k 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 Session?

Skills that share tags, products or a category with Gjc SDK Session: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 297k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gjc SDK Session?

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.