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 isaacsight/kernel --skill mcp-sourcegit clone --depth 1 https://github.com/isaacsight/kernelWrote 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/isaacsight/kernel/mcp-source)<a href="https://agentmods.dev/skills/isaacsight/kernel/mcp-source"><img src="https://agentmods.dev/badge/skills/isaacsight/kernel/mcp-source/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/isaacsight/kernel/mcp-source"><img src="https://agentmods.dev/badge/skills/isaacsight/kernel/mcp-source.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00044 | $0.00807 |
| Opus 5.5 | $0.00018 | $0.00323 |
| Sonnet 5.5 | $0.00009 | $0.00161 |
| Haiku 4.5 | $0.00004 | $0.00081 |
Grade A, and why
mcp-source 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 1mo 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.
This is a copy
100% identical to mcp-source — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Switch MCP for Unity Package Source
You are switching the com.coplaydev.unity-mcp package source in one or more Unity projects.
allowed-tools
Bash, Read, Edit, ReadMcpResourceTool, ListMcpResourcesTool
Instructions
1. Parse arguments
The user's argument is: $ARGUMENTS
Valid values: main, beta, branch, local, or empty.
If empty or not one of the four valid values, ask the user to choose:
- main — upstream main branch (stable releases)
- beta — upstream beta branch (pre-release)
- branch — your current remote branch (for testing a PR)
- local — local file reference to your checkout (for live dev iteration)
2. Detect repo context
Run these git commands from the current working directory to find the unity-mcp repo:
git rev-parse --show-toplevel # → repo_root
git rev-parse --abbrev-ref HEAD # → branch_name
git remote get-url origin # → origin_url
Convert SSH origins to HTTPS: if origin_url starts with [email protected]:, transform it to https://github.com/{owner}/{repo}.git.
3. Discover target Unity projects
Try two approaches to find Packages/manifest.json files to update:
Approach A — MCP resources (preferred):
Read mcpforunity://project/info for each connected Unity instance (use ListMcpResourcesTool to find available instances). Extract projectRoot and use {projectRoot}/Packages/manifest.json.
Approach B — filesystem fallback:
If no MCP instances are connected, search upward from the current working directory for Packages/manifest.json files using Bash:
find "$(pwd)" -maxdepth 3 -name "manifest.json" -path "*/Packages/manifest.json" 2>/dev/null
If multiple manifests are found, update all of them (confirming with the user first).
4. Build the package URL
Based on the user's selection, construct the dependency value:
| Selection | URL |
|---|---|
main |
https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main |
beta |
https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#beta |
branch |
{origin_https}?path=/MCPForUnity#{branch_name} |
local |
file:{repo_root}/MCPForUnity |
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.
- 1mo ago First seen · 84 lines · 44 tokens per session scan A 7d3a10fac694
mcp-source is a skill published in the GitHub repository isaacsight/kernel (16 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 807 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to mcp-source, differing in 0 lines, and is treated as a copy.
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