MCP Server Starter (TypeScript)

#!/usr/bin/env bash set -eo pipefail # Read the hook JSON from stdin and extract the edited file path. payload="$(cat)" file_path="$(jq -r '.tool_input.file_path // .tool_response.filePath // empty' <<<"$payload")" # Only act on TS files. case "$file_path" in *.ts) # Lint just the changed file (use auto-fix to correct issues). npm run lint:fix -- "$file_path" || { echo "ESLint failed for $file_path" >&2 # Exit code 2 tells Claude to treat this as a blocking error and use stderr to fix it. exit 2 } # Project-wide typecheck (incremental cache makes repeated runs fast). npm run typecheck || { echo "TypeScript typecheck failed." >&2 exit 2 } ;; esac exit 0