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 acogood/diffmode_freenpx agentmods add plugins/acogood/diffmode_free/marketplacegit clone --depth 1 https://github.com/acogood/diffmode_freeGrade A, and why
diffmode-free 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 yesterday.
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
{
"$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
"name": "diffmode-free",
"owner": {
"name": "Anton Kogut",
"email": "[email protected]"
},
"plugins": [
{
"name": "diffmode-growth-tactics",
"source": "./plugin",
"description": "Free growth-strategy builder for startups that can't outspend their competitors. Point /start at your product URL and Diffmode researches who your buyers are and how your rivals win them, then builds 7-9 unconventional ways to get users — calibrated to your budget, stage, and team. You keep the competitor read, the buyer map, and the acquisition audit as briefs you can reuse. Runs locally into ./<slug>/ in your cwd; no account or API key needed — research runs on the built-in web search, with an opt-in Perplexity MCP path if you'd rather use your own.",
"category": "marketing"
}
]
}
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.
- yesterday First seen · 17 lines scan A 0baaa58cadd7
diffmode-free is a plugin published in the GitHub repository acogood/diffmode_free (159 stars, last pushed 21d 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 2026-08-30.
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