Individual skill
delegate-call-risks
Delegatecall risks and safety patterns for Solidity proxies and modular contracts. Use when implementing upgradeable proxies, diamond patterns, or any contract using delegatecall. Covers storage layout requirements, context preservation, and implementation safety.
skills/delegate-call-risks/SKILL.md
Source commit a53141f10a1bbf9c634e44af6bc5a29dd1660697
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Instructions only
- Last checked
- Nov 7, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 132
- Repository last updated
- Oct 23, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- legal Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Read excerpt
# Delegatecall Risks
## How Delegatecall Works
`delegatecall` executes the target's code in the **caller's** context: the caller's storage, `msg.sender`, `msg.value`, and `address(this)` are preserved.
```
Proxy (storage) → delegatecall → Implementation (code)
- slot 0: admin executes in reads/writes Proxy's storage
- slot 1: value Proxy context msg.sender = original caller
```
## Storage Layout Must Match
