Running oxlint --fix in Zed

.zed-slash-settings.json

{
  "languages": {
    "JavaScript": {
      "format_on_save": "on",
      "formatter": [
        {
          "external": {
            "command": "./scripts/oxlint-format.sh",
            "arguments": ["{buffer_path}"]
          }
        },
        "prettier"
      ]
    },
    "TypeScript": {
      "format_on_save": "on",
      "formatter": [
        {
          "external": {
            "command": "./scripts/oxlint-format.sh",
            "arguments": ["{buffer_path}"]
          }
        },
        "prettier"
      ]
    },
    "TSX": {
      "format_on_save": "on",
      "formatter": [
        {
          "external": {
            "command": "./scripts/oxlint-format.sh",
            "arguments": ["{buffer_path}"]
          }
        },
        "prettier"
      ]
    }
  }
}

scripts-slash-oxlint-format.sh

#!/bin/bash
# Wrapper to make oxlint --fix work as a stdin→stdout formatter for Zed
# Usage: oxlint-format.sh <original-file-path>

# Disable job control to suppress "Abort trap" messages
set +m

ORIGINAL_PATH="$1"
EXT="${ORIGINAL_PATH##*.}"

# Change to project root so oxlint can find .oxlintrc.json
PROJECT_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$PROJECT_ROOT"

# Create temp file INSIDE the project so oxlint can process it
# (oxlint fails on files outside project root due to gitignore handling)
TEMP_DIR="$PROJECT_ROOT/.oxlint-tmp"
mkdir -p "$TEMP_DIR"
TEMP_FILE="$TEMP_DIR/format-temp.$EXT"

# Read stdin (file content from Zed) into temp file
cat > "$TEMP_FILE"

# Run oxlint --fix, suppress all output including crash messages
"$PROJECT_ROOT/node_modules/.bin/oxlint" --fix "$TEMP_FILE" >/dev/null 2>&1 &
wait $! 2>/dev/null

# Output the fixed content
cat "$TEMP_FILE"

# Cleanup
rm -f "$TEMP_FILE"