EffectFence
Stops agents double-firing side effects: 1,000 racing duplicates, exactly one execution.
Install
npmstdio
npx -y effectfence Cargostdio
cargo install effectfence Client config (Claude Desktop, Cursor, Windsurf and most MCP clients)
{
"mcpServers": {
"io-github-aurumflux20-effectfence": {
"command": "npx",
"args": [
"-y",
"effectfence"
]
}
}
} Source: official MCP Registry record · registry name io.github.aurumflux20/effectfence · published 2026-09-08 · updated 2026-09-08. Not an endorsement; review the code before connecting it to anything sensitive.