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 skills add keep-starknet-strange/starknet-agentic --skill starknet-tongogit clone --depth 1 https://github.com/keep-starknet-strange/starknet-agenticWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/keep-starknet-strange/starknet-agentic/starknet-tongo)<a href="https://agentmods.dev/skills/keep-starknet-strange/starknet-agentic/starknet-tongo"><img src="https://agentmods.dev/badge/skills/keep-starknet-strange/starknet-agentic/starknet-tongo/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/keep-starknet-strange/starknet-agentic/starknet-tongo"><img src="https://agentmods.dev/badge/skills/keep-starknet-strange/starknet-agentic/starknet-tongo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What 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 5.1 | $0.00061 | $0.03902 |
| Opus 5.5 | $0.00024 | $0.01561 |
| Sonnet 5.5 | $0.00012 | $0.00780 |
| Haiku 4.5 | $0.00006 | $0.00390 |
Grade A, and why
starknet-tongo 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 20d 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.
How it starts
The opening of the file, as written. The whole thing — 364 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Starknet Tongo Skill
Confidential ERC20 payments on Starknet using the Tongo protocol. Tongo wraps any ERC20 token into encrypted balances using ElGamal encryption and zero-knowledge proofs. No trusted setup required.
When to Use
- Confidential ERC20 payment flows that require encrypted balances or private transfers.
- Compliance or auditor-enabled privacy flows built on top of Tongo accounts.
When NOT to Use
- Standard transparent ERC20 transfers, swaps, or wallet management without privacy requirements.
- Cairo contract authoring, deployment-only tasks, or security auditing of unrelated code.
Quick Start
- Install the Tongo SDK, configure the Starknet/Tongo keys, and connect a funded Starknet account.
- Use skills catalog if the flow expands into wallet setup, deployment, or auditing.
Prerequisites
npm install @fatsolutions/tongo-sdk@^2.0.0 starknet@^10.8.0
@fatsolutions/tongo-sdk bundles its own starknet.js 9.4.2. Give the Tongo classes your RPC URL (a string), not your starknet.js 10 RpcProvider: a v10 provider instance fails the SDK's internal check (Failed to parse URL from [object Object]) and does not typecheck. The calls Tongo operations return are plain Call objects that your v10 Account executes.
To run the demo script (scripts/demo-e2e.ts):
npm install dotenv && npm install -D tsx
Environment variables:
STARKNET_RPC_URL=https://starknet-mainnet.g.alchemy.com/v2/YOUR_KEY
STARKNET_ACCOUNT_ADDRESS=0x...
STARKNET_PRIVATE_KEY=0x...
TONGO_CONTRACT_ADDRESS=0x...
TONGO_PRIVATE_KEY=0x...
TONGO_AUDITOR_PRIVATE_KEY=0x... # Optional, only needed for auditor/compliance
The demo script additionally requires both sender and receiver keys (test-only):
TONGO_PRIVATE_KEY_SENDER=0x...
TONGO_PRIVATE_KEY_RECEIVER=0x...
For testing, Tongo's Sepolia USDC instance is 0x2640a5752136d6201a33fc5b5c4d58b6bcefdbe6a902892ca20eced975c6ae3 (listed in the Tongo relayer README). It was deployed at block 10394006, so use that as fromBlock for event scans. The keyless https://api.cartridge.gg/x/starknet/sepolia/rpc/v0_10 endpoint is enough to read state and build operations; use a keyed RPC for anything beyond light testing.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 20d ago Changed · +81 lines 49ca485c7593
- 1mo ago First seen · 283 lines · 61 tokens per session scan A 3d43775e6fab
starknet-tongo is a skill published in the GitHub repository keep-starknet-strange/starknet-agentic (81 stars, last pushed 2d ago), licensed MIT. It adds 61 tokens to every session and 3,902 once invoked, about $0.0002 per session on Opus 5.5. 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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