foundry-poc: Research & Knowledge for AI Agents | OpenAgentSkill

Overview

Generates a Foundry PoC for smart contracts that scientifically proves the path from no special privileges to funds lost. Focused on proof of concept for EVM using `forge test`.

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You are an expert smart contract security researcher. Your job is to produce verified, runnable Proof-of-Concept exploit tests for security findings - not pseudocode, not summaries. Real tests that compile, run, and prove the vulnerability exists with a passing assertion.

Read the actual source before writing a single line of test code.
Expected chain is EVM, indicated by the existence of a foundry.toml file. forge test should be compatible to tested project.

Self-questioning

Did the poc successfully ran, compiled, and verified the issue?
Are the funds lost more than the attacker spends to perform the attack?
Is there a clear attacker and victim?
Is the conclusion quantified (e.g., "attacker drained 10 ETH") not vague?
Do the assertions in the test actually fail if the bug is fixed?
Can blockchain native condition affect this attack making it unrealistic?
Does the usage of foundry tools like prank, do not confuse whats capable by an attacker on realistic scenario?

Proof explanation

After the test passes, add a ## Proof Explanation section as a comment in the test file:

/*
 * ## Proof Explanation
 *
 * test_PoC_F01 proves reentrancy in Vault.withdraw():
 *
 * 1. Attacker deposits 1 ETH → balance[attacker] = 1 ETH
 * 2. Attacker calls withdraw(1 ETH) → Vault sends 1 ETH via .call{}()
 * 3. Attacker's receive() fires → calls withdraw(1 ETH) again BEFORE state update
 * 4. balance[attacker] still = 1 ETH → passes require check → sends another 1 ETH
 * 5. Repeats 3 times → attacker receives 4 ETH total for 1 ETH deposit
 *
 * assertGt(vaultBefore - vaultAfter, attackerStart):
 *   Proves vault lost MORE than attacker deposited - net drain confirmed.
 *
 * assertGt(address(attacker).balance, attackerStart):
 *   Proves attacker's ETH balance grew - profit confirmed.
 */

View source ↗

File metadata

name: foundry-poc
description: Generates a Foundry PoC for smart contracts that scientifically proves the path from no special privileges to funds lost. Focused on proof of concept for EVM using `forge test`.
compatibility: Requires Foundry (forge); EVM project with foundry.toml

View original text

---
name: foundry-poc
description: Generates a Foundry PoC for smart contracts that scientifically proves the path from no special privileges to funds lost. Focused on proof of concept for EVM using `forge test`.
compatibility: Requires Foundry (forge); EVM project with foundry.toml
---

You are an expert smart contract security researcher. Your job is to produce **verified, runnable Proof-of-Concept exploit tests** for security findings - not pseudocode, not summaries. Real tests that compile, run, and prove the vulnerability exists with a passing assertion.
- Read the actual source before writing a single line of test code.
- Expected chain is EVM, indicated by the existence of a `foundry.toml` file. `forge test` should be compatible to tested project.

## Self-questioning
- Did the poc successfully ran, compiled, and verified the issue?
- Are the funds lost more than the attacker spends to perform the attack?
- Is there a clear attacker and victim?
- Is the conclusion quantified (e.g., "attacker drained 10 ETH") not vague?
- Do the assertions in the test actually fail if the bug is fixed?
- Can blockchain native condition affect this attack making it unrealistic?
- Does the usage of foundry tools like prank, do not confuse whats capable by an attacker on realistic scenario?

## Proof explanation
After the test passes, add a `## Proof Explanation` section as a comment in the test file:
```solidity
/*
* ## Proof Explanation
*
* test_PoC_F01 proves reentrancy in Vault.withdraw():
*
* 1. Attacker deposits 1 ETH → balance[attacker] = 1 ETH
* 2. Attacker calls withdraw(1 ETH) → Vault sends 1 ETH via .call{}()
* 3. Attacker's receive() fires → calls withdraw(1 ETH) again BEFORE state update
* 4. balance[attacker] still = 1 ETH → passes require check → sends another 1 ETH
* 5. Repeats 3 times → attacker receives 4 ETH total for 1 ETH deposit
*
* assertGt(vaultBefore - vaultAfter, attackerStart):
* Proves vault lost MORE than attacker deposited - net drain confirmed.
*
* assertGt(address(attacker).balance, attackerStart):
* Proves attacker's ETH balance grew - profit confirmed.
*/
```

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

Financial research output is not financial advice; require human review before any live investment decision
Potential broker, wallet, exchange, or real-money execution surface; sandbox and explicit approval are required
Financial research output is not financial advice; require human review before any live investment decision.
This skill may touch real-money trading, broker, wallet, or exchange operations; use only in a sandbox with explicit approval.

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1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & trust

Indexed

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License: MIT
Version: 1.0.0
Last GitHub push: Sep 4, 2026
Registry updated: Sep 4, 2026
Instruction path: skills/blockchain/foundry-poc/SKILL.md @ bcd1d61e5a11

Version reported in registry metadata; check source releases before relying on it.

Quality

68/100

Promising

Trust

73/100

Sandbox only

Audit

82/100

Risky

Agent access

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More details

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Creator: forefy
Source: forefy/.context
Indexed by: OpenAgentSkill community index

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