Pass regenerate-command to rainix-copy-artifacts

rainix now installs .staged-config/ itself and runs extra regeneration
only from the regenerate-command input (rainlanguage/rainix#433). Drop
build.sh's install block and pass build.sh as regenerate-command.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: thedavidmeister

.github/workflows/git-clean.yaml

@@ -6,4 +6,6 @@ jobs:
     # artifacts are still current. The meta hook is `script/build-meta.sh`;
     # pointers + abis use the upstream Build.sol convention.
     uses: rainlanguage/rainix/.github/workflows/rainix-copy-artifacts.yaml@main
+    with:
+      regenerate-command: ./script/build.sh
     secrets: inherit

script/build.sh

@@ -14,16 +14,6 @@ set -euxo pipefail
 
 cd "$(dirname "$0")/.."
 
-# `forge script script/Build.sol` stages the generated network config here,
-# because forge refuses filesystem writes to the root `foundry.toml`.
-staged=.staged-config
-if [ ! -d "$staged" ] || [ -z "$(find "$staged" -mindepth 1 -maxdepth 1 -type f)" ]; then
-  echo "::error::$staged/ is missing or empty; run forge script ./script/Build.sol first." >&2
-  exit 1
-fi
-find "$staged" -mindepth 1 -maxdepth 1 -type f -exec cp {} . \;
-rm -rf "$staged"
-
 # Pass the whole pipeline via `bash -c '...'` rather than `bash <<INNER`:
 # graph codegen / npm ci consume the heredoc body off stdin otherwise,
 # turning the rest of the script into bogus argv for the codegen command.