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.
npx agentmods add rules/phantom/phantom-agent-kit/solana-transaction-safetygit clone --depth 1 https://github.com/phantom/phantom-agent-kitWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00272 | $0.00272 |
| Opus 5 | $0.00136 | $0.00136 |
| Sonnet 5 | $0.00054 | $0.00054 |
| Haiku 4.5 | $0.00027 | $0.00027 |
Grade A, and why
solana-transaction-safety 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
Solana Transaction Safety
Amount Conversion
- Always use
LAMPORTS_PER_SOLfrom@solana/web3.jsfor SOL-to-lamport conversion. Never hardcode1000000000or any other magic number.
Priority Fees
- For time-sensitive transactions, add priority fees using
ComputeBudgetProgram.setComputeUnitPrice()from@solana/web3.js. This helps ensure transactions are processed quickly during network congestion.
Transaction Verification
- Always verify transaction status after sending by checking the signature with
connection.getSignatureStatus()orconnection.confirmTransaction(). Do not assume a returned signature means the transaction succeeded.
Network Selection
- Use
https://api.devnet.solana.com(devnet) for testing and development. - Use
https://api.mainnet-beta.solana.com(mainnet-beta) for production. - Never test against mainnet with real funds during development.
Key Security
- Never expose private keys in code. Phantom handles all signing internally through its SDK. There is no need to access or manage private keys directly.
- Never ask users to input their seed phrase or private key.
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 · 31 lines · 272 tokens per session scan A dda8df1f806c
solana-transaction-safety is a cursor rule published in the GitHub repository phantom/phantom-agent-kit (11 stars, last pushed 15d ago), licensed MIT. It adds 272 tokens to every session, about $0.0014 per session on Opus 5. 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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