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 JustineDevs/premortemnpx agentmods add plugins/justinedevs/premortem/marketplacegit clone --depth 1 https://github.com/JustineDevs/premortemWrote 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/plugins/justinedevs/premortem/marketplace)<a href="https://agentmods.dev/plugins/justinedevs/premortem/marketplace"><img src="https://agentmods.dev/badge/plugins/justinedevs/premortem/marketplace.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
core-engineering marketplace 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 4d 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
{
"name": "core-engineering",
"owner": {
"name": "JustineDevs",
"email": "[email protected]"
},
"metadata": {
"description": "OOP four pillars, SOLID, clean code (DRY, KISS, YAGNI, Law of Demeter), composition over inheritance, and relationship types (association, aggregation, composition) with example code for AI agents and developers.",
"pluginRoot": "."
},
"plugins": [
{
"name": "core-engineering",
"source": ".",
"description": "Core Engineering skill: Object-Oriented Design (Abstraction, Encapsulation, Inheritance, Polymorphism), SOLID principles, composition over inheritance, DRY/KISS/YAGNI/LoD, and association vs aggregation vs composition. Each principle includes how it looks and TypeScript examples.",
"category": "Software Design"
}
]
}
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.
- 4d ago First seen · 20 lines scan A 350100b00a22
core-engineering marketplace is a plugin published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. 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
code-gauntlet
Adversarial multi-agent code review. Your PR runs a gauntlet of up to seven concern-specialized agents, then survives deterministic verification, skeptical validation, and a blind challenge before anything reaches you. Prompt injection defense and flexible delivery (PR/MR comments, markdown, chat). Supports GitHub and.
pr-comments-resolver
Resolve unresolved PR/MR review comments across GitHub, GitLab, Bitbucket Cloud, and Azure DevOps.
code-gauntlet
Adversarial multi-agent code review. Your PR runs a gauntlet of up to seven concern-specialized agents, then survives deterministic verification, skeptical validation, and a blind challenge before anything reaches you. Prompt injection defense and flexible delivery (PR/MR comments, markdown, chat). Supports GitHub and.
claude-settings marketplace
Plugin marketplace listing 36 plugins: simplify, humanize, fable-advisor, codex-advisor, adhd-output-style.
gcloud-tools
Google Cloud Observability MCP for logs, metrics, and traces, plus best practices.
clickup-cli
ClickUp CLI integration — manage tasks, sprints, comments, and statuses from Claude Code.