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 ulises-jeremias/agent-toolkit --skill megalinter-checkgit clone --depth 1 https://github.com/ulises-jeremias/agent-toolkitWrote 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/ulises-jeremias/agent-toolkit/megalinter-check)<a href="https://agentmods.dev/skills/ulises-jeremias/agent-toolkit/megalinter-check"><img src="https://agentmods.dev/badge/skills/ulises-jeremias/agent-toolkit/megalinter-check/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/ulises-jeremias/agent-toolkit/megalinter-check"><img src="https://agentmods.dev/badge/skills/ulises-jeremias/agent-toolkit/megalinter-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 11 findings, 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 MCP Rug Pull · line 55 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 89 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 90 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 105 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 106 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 135 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 151 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 152 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 158 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 109 Docker image references without a specific tag (:latest is implicit) or digest (@sha256:...) can be silently replaced by a malicious image.Fix: Pin the image: image:tag or image@sha256:abc123
- medium MCP Rug Pull · line 121 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00096 | $0.04077 |
| Opus 5 | $0.00048 | $0.02039 |
| Sonnet 5 | $0.00019 | $0.00815 |
| Haiku 4.5 | $0.00010 | $0.00408 |
Grade A, and why
megalinter-check 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 5d 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 — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MegaLinter check
Collect the current MegaLinter errors and produce a compact error list that the megalinter-fix skill can consume.
Choose a mode
- Watch mode — a MegaLinter CI job exists for the current branch/PR (running or completed): parse its logs. No Docker needed.
- Local mode — no CI job available, or the user wants a pre-push check: run MegaLinter with Docker via
npx mega-linter-runner. - Targeted re-check (local, after fixes): re-run only the previously-failing linters in parallel standalone images.
Watch mode
- Detect the provider from
git remote get-url originand the CI config files present. - Load the matching provider guide from this skill's directory — only the one you need:
- GitHub Actions →
providers/github.md - GitLab CI →
providers/gitlab.md - Azure Pipelines →
providers/azure.md - Bitbucket Pipelines →
providers/bitbucket.md
- GitHub Actions →
- Follow the guide: locate the MegaLinter job, wait for completion if running, fetch the logs of the MegaLinter step.
- Parse the MegaLinter summary (the
❌/✅table) and per-linter error sections.
Local mode
Before the first local run, make sure the user is aware that running MegaLinter locally is resource-consuming: it needs a reasonably powerful machine (CPU, RAM, free disk space) and a good internet connection — MegaLinter is Docker-based and the first run downloads a large image (can be several GB depending on the flavor). Because of this, watch mode (CI does the work) is usually the recommended option. When both modes are possible (a MegaLinter CI job exists for the repository, or a branch/PR could be pushed to trigger one) and the user did not explicitly choose, ask them which mode to use (use your platform's structured question mechanism if it has one, with watch mode first/recommended) instead of starting a local run.
Engine preflight (before every local run)
Requires a container engine (docker or podman) that actually responds - an installed binary proves nothing: with a stopped backend (e.g. Docker Desktop's Windows service), the docker CLI can hang indefinitely instead of failing fast. Probe with a bound before starting any run:
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.
- 5d ago First seen · 223 lines · 96 tokens per session scan A e6e847180507
megalinter-check is a skill published in the GitHub repository ulises-jeremias/agent-toolkit (16 stars, last pushed today), licensed MIT. It adds 96 tokens to every session and 4,077 once invoked, about $0.0005 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 2026-09-04.
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