Community plugin: @prflght/sak-plugin — transaction firewall for SAK agents

[4oko4ow]

What is @prflght/sak-plugin?

A transparent safety layer for Solana Agent Kit agents. Wraps the SAK execution flow to intercept every transaction before it lands on-chain — no changes to agent code required.

npm: @prflght/sak-plugin
GitHub: https://github.com/prflght/prflght
Website: https://prflght.xyz

Integration (3 lines)

import { createPrflghtPlugin } from '@prflght/sak-plugin'

const agent = new SolanaAgentKit(wallet, RPC_URL, {})
  .use(TokenPlugin)
  .use(createPrflghtPlugin({ agentId, apiKey: process.env.PRFLGHT_API_KEY }))

What it does

Every SAK transaction goes through:

1. Simulation — replays the tx against current chain state
2. Policy check — validates against agent policy (notional limits, allowed programs, daily spend)
3. Protocol health — checks live TVL health of target venue (Orca, Jupiter, Drift, Kamino, Raydium, and 7 more)
4. Signed attestation — returns ed25519 attestation verified by the on-chain prflght program

If any check fails → FirewallDenyError is thrown, transaction never reaches the network.

Why this matters

SAK agents are increasingly used in production DeFi contexts. Without a safety layer:

• Prompt injection can drain wallets
• Misconfigured slippage can cause large losses
• Unhealthy protocol interactions can result in stuck funds

prflght adds enforcement that operates independently of the LLM — the policy is stored on-chain and cannot be overridden by prompt manipulation.

On-chain program

Deployed on Solana mainnet: 3JxoMhdGbnGx4eTvZ9nagSBdoWu1okd1Sf5VA3eRyKfo

Happy to discuss adding this to the SAK plugin ecosystem or documentation.