Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
/plugin marketplace add jackchuka/skillctxnpx agentmods add plugins/jackchuka/skillctx/marketplacegit clone --depth 1 https://github.com/jackchuka/skillctxGrade A, and why
skillctx scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
"name": "skillctx",
"description": "Make your agent skills portable by extracting hardcoded values into a central config and embedding resolver scripts",
"owner": {
"name": "jackchuka",
"url": "https://github.com/jackchuka"
},
"metadata": {
"description": "Make your agent skills more portable by centralizing skill context"
},
"plugins": [
{
"name": "skillctx",
"source": "./",
"description": "Portable agent skills \u2014 scan for hardcoded values, extract to config, and embed resolver scripts",
"version": "0.1.0",
"author": {
"name": "jackchuka",
"url": "https://github.com/jackchuka"
},
"homepage": "https://github.com/jackchuka/skillctx",
"repository": "https://github.com/jackchuka/skillctx",
"license": "MIT",
"keywords": [
"claude-code",
"agent",
"skills",
"context",
"portable",
"config",
"resolver"
],
"category": "workflow",
"tags": [
"agent",
"skills",
"portability",
"config",
"resolver"
]
}
]
}
What ships with it
1 file beside marketplace.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 45 lines scan A f1a9b80ddaff
skillctx is a plugin published in the GitHub repository jackchuka/skillctx (5 stars, last pushed 14d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other plugins, from other repositories
gemini-skills
Plugin marketplace listing 1 plugin: gemini-skills.
gemini-skills
A library of skills for the Gemini API, SDK and model interactions.
oracledb
Connect, query, and interact with Oracle Databases and their data.
oracledb-marketplace
Plugin marketplace listing 1 plugin: oracledb.
anti-sycophant
Plugin marketplace listing 1 plugin: anti-sycophant.
anti-sycophant
Skills that get AI assistants to stop agreeing with bad product ideas by default — pressure-test premises, separate hobbies from businesses, and refuse validation theater.