docs: drop the --no-match-contract Chain selection nobody runs

CLAUDE.md

@@ -64,8 +64,7 @@ POLYGON_RPC_URL=https://polygon-bor-rpc.publicnode.com
 All five are needed: `RainDeployVerifyChain` forks every network in
 `supportedNetworks()`, so a missing or rate-limited endpoint fails it. Those
 failures are `vm.createSelectFork` errors, distinct from the
-`NotDeployedOnNetwork` a reachable network raises, and the snapshot contracts
-run regardless: `forge test --no-match-contract Chain`.
+`NotDeployedOnNetwork` a reachable network raises.
 
 These are referenced in `foundry.toml` under `[rpc_endpoints]`.
 
@@ -270,8 +269,7 @@ can set. Group 3 is what makes group 4's scope complete — a release group 4 is
 never handed is a release it cannot fail on.
 
 Group 4 lives in its own contract so an unreachable RPC endpoint fails only it,
-never the snapshot assertions — `forge test --no-match-contract Chain` is the
-whole snapshot gate, and nothing reachable from those contracts forks anything.
+never the snapshot assertions, and a failure names which of the two it was.
 
 A single recorded code hash per version can only be true if the runtime code is
 the same on every network, so a constructor reading `block.chainid` or similar

test/src/concrete/AddressRegistryDeployChain.t.sol

@@ -20,9 +20,8 @@ import {AddressRegistryDeploySuites} from "../../../src/abstract/AddressRegistry
 /// consistent set of pins for a contract that exists nowhere passes every one
 /// of them. A green here would only mean nobody asked.
 ///
-/// It is a separate contract from `AddressRegistryDeploySnapshotTest`
-/// precisely so that it says this and nothing more: `forge test
-/// --no-match-contract Chain` still runs every snapshot assertion,
-/// whether the deployment is missing or the RPC endpoints are merely
-/// unreachable.
+/// It is a separate contract from `AddressRegistryDeploySnapshotTest` precisely
+/// so that it says this and nothing more: a missing deployment or an
+/// unreachable endpoint fails here alone, leaving every snapshot assertion to
+/// answer for itself.
 contract AddressRegistryDeployChainTest is AddressRegistryDeploySuites, RainDeployVerifyChain {}