Ghostty with Claude Code. That's pretty much it.

For each new feature, I open a worktree, spar with Claude to work up a gherkin spec with @todo on each story. Each agent pushes commits to a WIP PR in GitHub where I review and leave comments or questions. Once the spec is done we mainly interact on the PR. @todo becomes @wip and @done as the agent progresses. I really like gherkin for agentic engineering, it's very clarifying.

I have about 2-4 agents running at a time. Large test suite, linters and formatters enforced on push.