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.
npx skills add dcc-mcp/dcc-mcp-core --skill marketplace-create-extensiongit clone --depth 1 https://github.com/dcc-mcp/dcc-mcp-coreWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dcc-mcp/dcc-mcp-core/marketplace-create-extension)<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-core/marketplace-create-extension"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-core/marketplace-create-extension/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-core/marketplace-create-extension"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-core/marketplace-create-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 25 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.00730 |
| Opus 5 | $0.00031 | $0.00365 |
| Sonnet 5 | $0.00012 | $0.00146 |
| Haiku 4.5 | $0.00006 | $0.00073 |
Grade A, and why
marketplace-create-extension 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 11d ago.
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.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Marketplace Create Extension
CLI-First Control Path
For marketplace and live-DCC operations, use the dcc-mcp skill and
dcc-mcp-cli whenever shell access is available. Its consent-gated install and
update check → update apply contract is the single source of truth; do not
invent a package-local CLI bootstrap path.
Scaffold a new marketplace extension package with the standard dcc-mcp
skill layout and MIT-0 licensing. Follows the same patterns as
dcc-mcp-skills-creator.
The scaffold tool creates one Skill. To distribute several generated Skills
together, place them under skills/ in an Agent Plugins 1.0 package with a root
plugin.json; keep them separate when they do not share one release and
uninstall boundary.
Tools
marketplace_create_extension__create
Scaffold a new extension directory containing SKILL.md (MIT-0), tools.yaml
(with full annotations), and a scripts/ directory with a placeholder action
script that uses dcc_mcp_core.skills_helper.
Prerequisites
- dcc-mcp-core installed
- Write access to the target output directory
Generated Layout
<name>/
├── SKILL.md # MIT-0 frontmatter + body
├── tools.yaml # Tool declarations with schemas, annotations, execution metadata
└── scripts/
└── <action>.py # Placeholder using skills_helper pattern
Quick Start
from dcc_mcp_core.skills_helper import call_tool
# Via MCP tool call:
# marketplace_create_extension__create(
# name="my-maya-tools",
# description="Custom Maya modeling utilities",
# dcc_targets=["maya"],
# install_type="git",
# author="Your Name",
# )
Authoring Workflow
- Scaffold the extension with
marketplace_create_extension__create. - Implement the placeholder action script.
- Validate with
dcc_mcp_skills_creator__validate_skill_dir. - Publish to a marketplace catalog with
marketplace_publish_extension__publish.
Read MARKETPLACE_EXTENSION_GUIDE.md for the full marketplace extension authoring contract.
What ships with it
3 files beside SKILL.md 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.
- 11d ago First seen · 92 lines · 62 tokens per session scan A a582164ddcc0
marketplace-create-extension is a skill published in the GitHub repository dcc-mcp/dcc-mcp-core (44 stars, last pushed today), licensed MIT. It adds 62 tokens to every session and 730 once invoked, about $0.0003 per session on Opus 5. 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 2026-08-30.
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