MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Discover and inspect trusted local GJC sessions through the broker-bound session CLI.
Install Gjc SDK Discover
$ npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-discover --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/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .claude/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .claude/skills/gjc-sdk-discover && 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 "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .claude/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discoverType 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 Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-discover --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .agents/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .agents/skills/gjc-sdk-discover && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .agents/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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 Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-discover --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .cursor/skills/gjc-sdk-discover && 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 "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .cursor/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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/Yeachan-Heo/gajae-code.git --path sdk-skills/gjc-sdk-discover--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 Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-discover --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .gemini/skills/gjc-sdk-discover && 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 "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .gemini/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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 Yeachan-Heo/gajae-code gjc-sdk-discoverInstalls 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 Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .github/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .github/skills/gjc-sdk-discover && 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 "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .github/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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 Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Yeachan-Heo/gajae-code gjc-sdk-discover --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/sdk-skills/gjc-sdk-discover .opencode/skills/gjc-sdk-discover && 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 "gjc-sdk-discover" agent skill from https://github.com/Yeachan-Heo/gajae-code/tree/main/sdk-skills/gjc-sdk-discover into .opencode/skills/gjc-sdk-discover/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gjc-sdk-discover", 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
gjc-sdk-discover- GitHub stars
- 2.9k
- Token cost
- ~1k tokens
- SKILL.md length
- 542 words
- Files
- 1
- Skills in repo
- 9
- Repo updated
- First seen
- Licence
- MIT
At a glance
Discover and inspect trusted local GJC sessions through the broker-bound session CLI.
- Works in 6 steps: Resolve the repository root explicitly. → Run gjc sdk session list --json with… → Select an exact session ID from that… → …
- Agent Workflows work in your project
- SKILL.md covers Required behavior, Core inspection recipe, Bounded discovery and failure… and Broker-bound references
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Gjc SDK Discover is an agent skill from Yeachan-Heo/gajae-code. Discover and inspect trusted local GJC sessions through the broker-bound session CLI.
Its SKILL.md is about 1k 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-discover”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Resolve the repository root explicitly.
- Run gjc sdk session list --json with that repository as the working directory and consume only its credential-free Broker DTO.
- Select an exact session ID from that DTO, then use gjc sdk session inspect --json or the fixed raw-query commands below.
- Fail closed for missing, unavailable, stale, dead, unknown, or ambiguous Broker results.
- Never scan .gjc/state/sdk, parse endpoint records, read credentials, or open a raw per-session WebSocket.
- Add --json explicitly to every machine CLI call: successful session JSON is unchanged, but default ordinary failures are text on stderr…
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 Discover loads about 1k tokens when it runs. Until then it costs about 26 tokens; SKILL.md has 542 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 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). 542 words, ~1,042 tokens.
Download SKILL.mdSave it as
.claude/skills/gjc-sdk-discover/SKILL.md (or your agent's skills folder).- name
- gjc-sdk-discover
- description
- Discover and inspect trusted local GJC sessions through the broker-bound session CLI.
GJC SDK session discovery
Use this skill when an external agent needs to find or inspect local GJC sessions without terminal scraping, MCP, or coordinator delegation.
Required behavior
- Resolve the repository root explicitly.
- Run
gjc sdk session list --jsonwith that repository as the working directory and consume only its credential-free Broker DTO. - Select an exact session ID from that DTO, then use
gjc sdk session inspect <sessionId> --jsonor the fixed raw-query commands below. - Fail closed for missing, unavailable, stale, dead, unknown, or ambiguous Broker results.
- Never scan
.gjc/state/sdk, parse endpoint records, read credentials, or open a raw per-session WebSocket. - Add
--jsonexplicitly to every machine CLI call: successful session JSON is unchanged, but default ordinary failures are text on stderr. Consume the singlegjc.command-errorversion 1 stdout envelope on nonzero exit; never treat missing JSON as success or publish raw stderr. Usage exits 2; operation failures exit 1.
Core inspection recipe
Compose this task-required pull-based view in order with gjc sdk session raw query <sessionId> --query <query> --json:
session.metadatacontext.getgoal.list/gettodo.listworkflow.gates.listsession.stats
Fetch transcript pages and diffs only when the user's task requires them:
transcript.listandtranscript.bodydiff.list_files,diff.list_hunks, anddiff.read_hunk
The reads are not an atomic snapshot. For every reported field, identify its source query and classify it as confirmed, inferred, stale, unavailable, or unknown. Preserve partial results when independent queries succeed; never invent a missing value.
Show full SKILL.md (298 more words)Show less
Bounded discovery and failure evidence
Use inert local help, for example gjc sdk session raw query --help --json.
Sections are overview|usage|children|arguments|options|examples|recovery;
--help-section <section> --help-page <N> selects a page (default overview/1).
Follow returned next.argv with --help-revision <sha256> and --json intact.
-h is supported, --help=json is not; selectors require actual help, no
repeats and positive decimal safe-integer pages. Values and -- cannot activate
help. Help lists only the local node/immediate children and performs no probes.
Help, ordinary errors and evidence pages are each at most 8192 UTF-8 bytes;
this does not bound or paginate successful query bodies. Preserve safe complete
references and outcome certainty. An uncertain result never proves non-execution.
Do not add probes or automatic retries/restarts/kills just to produce guidance;
never suggest gjc daemon restart sdk (daemon kinds are telegram/discord/slack).
Only when a failure advertises a verified retained continuation, retrieve it at
gjc sdk (or its original gjc daemon family) with --error-ref <id> and
--error-sha256 <digest>, optional --error-page <N> and
--error-agent-dir <dir>, plus --json. Use the returned argv, not placeholders.
Root retrieval is exclusive with help/operations; it never scans other roots or
reruns an operation. Retention is exactly 24 hours, non-sliding: at most 64
committed records, 1 MiB each and 16 MiB aggregate, plus one 1 MiB pending file
and one 4096-byte lock. Help/success does not initialize this store.
Disk, permissions, quota or publication failure may yield complete: false,
evidence.status: "unavailable", continuation: null; preserve the original
certainty and warn against blind replay. Never fabricate a locator or promise
lossless retrieval without successful publication and an unexpired record.
Reassemble base64 fragments by contiguous byte offsets and verify length/SHA256
before decoding UTF-8/JSON. A fragment is not executable; text help's escaped
JSON display literals are not shell argv.
Broker-bound references
- SDK session CLI:
docs/sdk-session-cli.mdin the gajae-code repository - Canonical templates:
gjc-sdk-author/templates/direct-sdk.tsanddirect-sdk.py
© 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 sdk-skills/gjc-sdk-discover of Yeachan-Heo/gajae-code.
Open the folder on GitHubat commit 91fe978
Compare with similar skills
Gjc SDK Discover 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 |
|---|---|---|---|---|---|---|
| Gjc SDK Discover this skillYeachan-Heo/gajae-code | 2.9k | — | ~1k | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 36 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 297k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Skill CreatorAzure/azqr | 796 | 89 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 |
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Using Superpowers
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Executing Plans Inline
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Related
Categories
Questions about Gjc SDK Discover
What does Gjc SDK Discover do?
Discover and inspect trusted local GJC sessions through the broker-bound session CLI. Gjc SDK Discover is an agent skill from Yeachan-Heo/gajae-code. Discover and inspect trusted local GJC sessions through the broker-bound session CLI.
When should I use Gjc SDK Discover?
Gjc SDK Discover fits situations like: agent Workflows work in your project.
How do I install Gjc SDK Discover in Claude Code?
Run `npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a claude-code`. Or copy the skill folder (sdk-skills/gjc-sdk-discover in Yeachan-Heo/gajae-code) into .claude/skills/gjc-sdk-discover in your project. Claude Code loads it when a task matches its description.
How do I install Gjc SDK Discover in Codex?
Run `npx skills add Yeachan-Heo/gajae-code --skill gjc-sdk-discover -a codex`. Or copy the skill folder (sdk-skills/gjc-sdk-discover in Yeachan-Heo/gajae-code) into .agents/skills/gjc-sdk-discover in your project. Codex loads it when a task matches its description.
Can I use Gjc SDK Discover 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-discover -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-discover, .gemini/skills/gjc-sdk-discover, .github/skills/gjc-sdk-discover and .opencode/skills/gjc-sdk-discover in your project.
What does Gjc SDK Discover need to run?
SKILL.md names no scripts, command-line tools or credentials: Gjc SDK Discover is instructions for the agent only.
Does Gjc SDK Discover 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 Discover 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 Discover use?
Gjc SDK Discover 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 Discover use?
About 1k tokens (SKILL.md is roughly 4.2k 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 Discover?
Skills that share tags, products or a category with Gjc SDK Discover: 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 Discover?
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.