From 2bf0670becb73a6b7dfde0cff18a36a368764b4c Mon Sep 17 00:00:00 2001
From: Vasyl Ivanchuk <vasyl.ivanchuk@gmail.com>
Date: Mon, 30 Mar 2026 17:00:42 +0300
Subject: [PATCH 1/3] feat: add support for local-chains/local_dev.yaml

---
 action.yml | 32 +++++++++++++++++++++++++++-----
 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/action.yml b/action.yml
index 98e8de3..25db47a 100644
--- a/action.yml
+++ b/action.yml
@@ -339,6 +339,13 @@ runs:
             exit 1
           fi
 
+          LOCAL_DEV_YAML="../local-chains/local_dev.yaml"
+          local_dev_abs=""
+          if [[ -f "$LOCAL_DEV_YAML" ]]; then
+            local_dev_abs="$(realpath "$LOCAL_DEV_YAML")"
+            echo "Found local_dev.yaml at $local_dev_abs; will prepend to --config"
+          fi
+
           for chain_id in $(echo "${!PORT_MAP[@]}" | tr ' ' '\n' | sort); do
             config_file="$MULTI_DIR/chain_${chain_id}.yaml"
 
@@ -347,9 +354,15 @@ runs:
               exit 1
             fi
 
+            if [[ -n "$local_dev_abs" ]]; then
+              config_arg="${local_dev_abs}:${config_file}"
+            else
+              config_arg="$config_file"
+            fi
+
             log_file="zksyncos_${chain_id}.log"
-            echo "Starting chain $chain_id with config: $config_file"
-            setsid bash -c "exec ./zksync-os-server --config \"$config_file\" </dev/null >>\"$log_file\" 2>&1" &
+            echo "Starting chain $chain_id with config: $config_arg"
+            setsid bash -c "exec ./zksync-os-server --config \"$config_arg\" </dev/null >>\"$log_file\" 2>&1" &
             echo $! > "l2_${chain_id}.pid"
             sleep "${{ inputs.boot_grace_seconds }}"
           done
@@ -375,8 +388,17 @@ runs:
 
           CONFIG_ABS="${{ steps.config.outputs.path }}"
 
-          echo "Launching: ./zksync-os-server --config $CONFIG_ABS"
-          setsid bash -c "exec ./zksync-os-server --config \"$CONFIG_ABS\" </dev/null >>zksyncos.log 2>&1" &
+          LOCAL_DEV_YAML="../local-chains/local_dev.yaml"
+          if [[ -f "$LOCAL_DEV_YAML" ]]; then
+            LOCAL_DEV_ABS="$(realpath "$LOCAL_DEV_YAML")"
+            echo "Found local_dev.yaml at $LOCAL_DEV_ABS; will prepend to --config"
+            CONFIG_ARG="${LOCAL_DEV_ABS}:${CONFIG_ABS}"
+          else
+            CONFIG_ARG="$CONFIG_ABS"
+          fi
+
+          echo "Launching: ./zksync-os-server --config $CONFIG_ARG"
+          setsid bash -c "exec ./zksync-os-server --config \"$CONFIG_ARG\" </dev/null >>zksyncos.log 2>&1" &
           echo $! > l2.pid
 
           sleep "${{ inputs.boot_grace_seconds }}"
@@ -390,7 +412,7 @@ runs:
             echo "::endgroup::"
 
             echo "::group::try foreground run to capture error"
-            ./zksync-os-server --config "$CONFIG_ABS" || true
+            ./zksync-os-server --config "$CONFIG_ARG" || true
             echo "::endgroup::"
 
             exit 1

From ce7023f87a57d000a56335714d5ad2af8d50c119 Mon Sep 17 00:00:00 2001
From: Vasyl Ivanchuk <vasyl.ivanchuk@gmail.com>
Date: Mon, 30 Mar 2026 17:34:11 +0300
Subject: [PATCH 2/3] fix: local_dev.yaml path

---
 action.yml | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/action.yml b/action.yml
index 25db47a..f9f85fd 100644
--- a/action.yml
+++ b/action.yml
@@ -339,10 +339,10 @@ runs:
             exit 1
           fi
 
-          LOCAL_DEV_YAML="../local-chains/local_dev.yaml"
+          LOCAL_DEV_YAML="$(pwd)/local-chains/local_dev.yaml"
           local_dev_abs=""
           if [[ -f "$LOCAL_DEV_YAML" ]]; then
-            local_dev_abs="$(realpath "$LOCAL_DEV_YAML")"
+            local_dev_abs="$LOCAL_DEV_YAML"
             echo "Found local_dev.yaml at $local_dev_abs; will prepend to --config"
           fi
 
@@ -388,11 +388,10 @@ runs:
 
           CONFIG_ABS="${{ steps.config.outputs.path }}"
 
-          LOCAL_DEV_YAML="../local-chains/local_dev.yaml"
+          LOCAL_DEV_YAML="$(pwd)/local-chains/local_dev.yaml"
           if [[ -f "$LOCAL_DEV_YAML" ]]; then
-            LOCAL_DEV_ABS="$(realpath "$LOCAL_DEV_YAML")"
-            echo "Found local_dev.yaml at $LOCAL_DEV_ABS; will prepend to --config"
-            CONFIG_ARG="${LOCAL_DEV_ABS}:${CONFIG_ABS}"
+            echo "Found local_dev.yaml at $LOCAL_DEV_YAML; will prepend to --config"
+            CONFIG_ARG="${LOCAL_DEV_YAML}:${CONFIG_ABS}"
           else
             CONFIG_ARG="$CONFIG_ABS"
           fi

From 314c31b2405eb00323eabbbc9d8c3a993dec06be Mon Sep 17 00:00:00 2001
From: Vasyl Ivanchuk <vasyl.ivanchuk@gmail.com>
Date: Mon, 30 Mar 2026 17:38:44 +0300
Subject: [PATCH 3/3] fix: avoid local_dev.yaml path duplication

---
 action.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/action.yml b/action.yml
index f9f85fd..62822d6 100644
--- a/action.yml
+++ b/action.yml
@@ -319,6 +319,8 @@ runs:
         export RUST_LOG=info
         export RUST_BACKTRACE=1
 
+        LOCAL_DEV_YAML="$(pwd)/local-chains/local_dev.yaml"
+
         if [[ "${{ inputs.setup }}" == "multi_chain" ]]; then
           MULTI_DIR="$(pwd)/local-chains/${{ inputs.protocol_version }}/multi_chain"
           if [[ ! -d "$MULTI_DIR" ]]; then
@@ -339,7 +341,6 @@ runs:
             exit 1
           fi
 
-          LOCAL_DEV_YAML="$(pwd)/local-chains/local_dev.yaml"
           local_dev_abs=""
           if [[ -f "$LOCAL_DEV_YAML" ]]; then
             local_dev_abs="$LOCAL_DEV_YAML"
@@ -388,7 +389,6 @@ runs:
 
           CONFIG_ABS="${{ steps.config.outputs.path }}"
 
-          LOCAL_DEV_YAML="$(pwd)/local-chains/local_dev.yaml"
           if [[ -f "$LOCAL_DEV_YAML" ]]; then
             echo "Found local_dev.yaml at $LOCAL_DEV_YAML; will prepend to --config"
             CONFIG_ARG="${LOCAL_DEV_YAML}:${CONFIG_ABS}"