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 yujiachen-y/claude-code-cache-keepalivenpx agentmods add plugins/yujiachen-y/claude-code-cache-keepalive/cache-keepalivegit clone --depth 1 https://github.com/yujiachen-y/claude-code-cache-keepaliveGrade A, and why
cache-keepalive 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 2d 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": "cache-keepalive",
"version": "0.1.1",
"description": "Keep Claude Code's 5-minute prompt cache warm across idle pauses by injecting cheap keepalive turns from a Stop hook. Saves real money on API-billed sessions with normal thinking gaps.",
"author": {
"name": "yujiachen-y"
},
"homepage": "https://github.com/yujiachen-y/claude-code-cache-keepalive",
"repository": "https://github.com/yujiachen-y/claude-code-cache-keepalive",
"license": "MIT",
"keywords": [
"cache",
"prompt-cache",
"keepalive",
"ttl",
"cost-optimization",
"hooks"
],
"userConfig": {
"interval_seconds": {
"type": "number",
"title": "Keepalive interval (seconds)",
"description": "Seconds the Stop hook sleeps before injecting a keepalive ping. Claude Code's prompt cache TTL is 300s (5 min); 240 leaves a 60s safety margin.",
"default": 240,
"min": 30,
"max": 290,
"required": false,
"sensitive": false
},
"keepalive_message": {
"type": "string",
"title": "Keepalive message",
"description": "Text injected as a user-side keepalive turn. Keep it bland so Claude replies cheaply without starting tools or generating long output.",
"default": "got it, i need some time to think about the next move",
"required": false,
"sensitive": false
},
"max_loops_per_turn": {
"type": "number",
"title": "Max keepalive loops per turn",
"description": "Max consecutive keepalive cycles per idle turn before giving up. At interval=240 and max=7, one idle turn keeps the cache warm for ~28 minutes.",
"default": 7,
"min": 1,
"max": 60,
"required": false,
"sensitive": false
}
}
}
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.
- 2d ago First seen · 50 lines scan A e566fbb211f6
cache-keepalive is a plugin published in the GitHub repository yujiachen-y/claude-code-cache-keepalive (16 stars, last pushed 4mo ago), licensed MIT. 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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