sem is a Git-based semantic version control tool that compares changes to code entities such as functions, methods, and classes instead of individual lines. It helps developers and coding agents review changes, trace responsibility, and assess their impact across repositories. Catalogue add-ons provide agent integrations and workflows for operating sem.
Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Ataraxy-Labs/sem/plugin install sem-review-listenerWrote 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/mcp/ataraxy-labs/sem/claude-review-listener-sem-review)<a href="https://agentmods.dev/mcp/ataraxy-labs/sem/claude-review-listener-sem-review"><img src="https://agentmods.dev/badge/mcp/ataraxy-labs/sem/claude-review-listener-sem-review/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/mcp/ataraxy-labs/sem/claude-review-listener-sem-review"><img src="https://agentmods.dev/badge/mcp/ataraxy-labs/sem/claude-review-listener-sem-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
sem-review 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 13d 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.
What it actually says
{
"sem-review": {
"command": "${CLAUDE_PLUGIN_ROOT}/../../crates/target/debug/sem",
"args": [
"mcp"
],
"env": {
"SEM_CLOUD_URL": "${SEM_CLOUD_URL:-}",
"SEM_API_KEY": "${SEM_API_KEY:-}"
}
}
}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.
- 13d ago First seen · 12 lines scan A 7938978fd94d
sem-review is an MCP server published in the GitHub repository Ataraxy-Labs/sem (3,345 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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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