Merge pull request #6 from 1001-digital/changeset-release/master

Version Packages

Author: jwahdatehagh

.changeset/zeppelinos-legacy-proxy.md

@@ -1,5 +1,17 @@
 # @1001-digital/proxies
 
+## 0.2.0
+
+### Minor Changes
+
+- [#5](https://github.com/1001-digital/proxies/pull/5) [`1fcc552`](https://github.com/1001-digital/proxies/commit/1fcc5528fc92a750abd6a04468da03a19a558466) Thanks [@jwahdatehagh](https://github.com/jwahdatehagh)! - Add `zeppelinos` pattern — legacy ZeppelinOS (pre-EIP-1967) upgradeable proxies.
+
+  `detectZeppelinOs` reads the implementation from `keccak256('org.zeppelinos.proxy.implementation')` (`0x7050…f8c3`) and attaches the admin from `keccak256('org.zeppelinos.proxy.admin')` when set. Wired into `detectProxy` between `eip-1822` and `eip-1167`.
+
+  These proxies predate EIP-1967's decremented-slot scheme and were previously undetectable: the EIP-1967 slots are empty, and `implementation()` sits behind an `ifAdmin` modifier, so the EIP-897 probe reverts for any non-admin caller. The most prominent deployment still on this layout is Circle's USDC (`FiatTokenProxy`, `0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48`), which now resolves to its `FiatTokenV2_2` implementation.
+
+  New exports: `detectZeppelinOs`, `ZEPPELINOS_IMPL_SLOT`, `ZEPPELINOS_ADMIN_SLOT`.
+
 ## 0.1.1
 
 ### Patch Changes

CHANGELOG.md

@@ -1,6 +1,6 @@
 {
   "name": "@1001-digital/proxies",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "description": "Ethereum proxy pattern detection primitives — ERC-2535 diamonds, EIP-1967, EIP-1167, beacon, Safe, EIP-1822, legacy ZeppelinOS, EIP-897. Detect, enrich, compose.",
   "license": "MIT",
   "repository": {