Gasoline v5.7.5 Released

Feb 6, 2026

Brenn Hill

What’s New in v5.7.5

This release makes Gasoline MCP feel instant. The new fast-start mode responds to MCP clients in ~130ms while the daemon boots in the background.

Fast-Start MCP Mode

Previously, MCP clients had to wait for the full daemon to boot before getting any response. Now, initialize and tools/list respond immediately from the bridge process:

Before: Client → wait 2-4s for daemon → get response
After:  Client → get response in ~130ms → daemon boots in background

This means your AI coding agent gets tool definitions instantly and can start planning while the server finishes starting up. If you call a tool before the daemon is ready, you get a helpful retry message instead of a hang.

Port Conflict Diagnostics

The --doctor command now checks if port 7890 is available:

npx gasoline-mcp --doctor

# Now shows:
# ✅ Port 7890
#    Default port is available
#
# Or if blocked:
# ⚠️  Port 7890
#    Port 7890 is in use (PID: 12345)
#    Suggestion: Use --port 7891 or kill the process using the port

Better Error Messages

When the daemon can’t start because the port is blocked, you now get actionable suggestions:

Server failed to start: port 7890 already in use. Port may be in use. Try: npx gasoline-mcp --port 7891

Faster Failure Detection

Daemon startup timeout reduced from 10s to 4s. If something is wrong, you’ll know in 4 seconds instead of 10.

Upgrade

npx gasoline-mcp@5.7.5

Full Changelog

See the complete list of changes on GitHub.