David Heinemeier Hansson
EngineerLast updated: Jul 27, 2026
| Role | CTO, 37signals; Rails creator |
|---|---|
| Earns | Engineer |
| Sources | 13 cited fields · high confidence |
Runs terminal-based OpenCode and Claude Code agents in tmux, starts with fast Kimi and uses Neovim for review rather than an AI-first editor.
“With a team of agents, they're doing their work autonomously, and I just review the final outcome, offer guidance when asked, and marvel at how this is possible at all.” world.hey.com
Loadout
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David Heinemeier Hansson’s loadout
Engineer
Harness
OpenCode
Uses OpenCode and Claude Code together in a tmux development layout, starting tasks with Kimi.
Model
Kimi K2.7 Code Fast
A July 2026 post shows this model/build responding to an exchange.
Also usesClaude Code
Second opinion and more advanced work in the bottom tmux pane.
EditorNeovim
Terminaltmux
ToolsLazygit+1 more
3 views · 0 equipped
Models
Kimi K2.7 Code Fast
A July 2026 post shows this model/build responding to an exchange.
Gemini 2.5
Fast model listed in the interview's workflow breakdown.
Editor & terminal
Neovim
Centered between agent terminals; used to review diffs.
tmux
Two agent/model panes around Neovim.
Tools
Lazygit
Used with Neovim for reviewing diffs.
CLI tools and skills
Agents control terminals, run tests, search docs and use skills.
Workflow
- 1Start almost all tasks with fast Kimi; ask Claude for a second opinion or harder work.x.com
- 2Run agents autonomously, then review the final outcome and guide when asked.world.hey.com, 2026-01
- 3Use supervised collaboration rather than pure vibe coding for professional work.world.hey.com, 2026-01
- 4Use CLI composition so an agent can check errors, fix code, post a PR and report back.newsletter.pragmaticengineer.com, 2026-04
Timeline
- 2026-07-27ModelKimi K2.7 Code Fastworld.hey.com, 2026-07
- 2026-04-08Also usesOpusnewsletter.pragmaticengineer.com, 2026-04
- 2026-04-08Also usesGemini 2.5newsletter.pragmaticengineer.com, 2026-04
- 2026-04-08EditorNeovimnewsletter.pragmaticengineer.com, 2026-04
- 2026-04-08Terminaltmuxnewsletter.pragmaticengineer.com, 2026-04
- 2026-04-08ToolsLazygitnewsletter.pragmaticengineer.com, 2026-04
- 2026-02-28HarnessOpenCodex.com, 2026-02
- 2026-01-07ToolsCLI tools and skillsworld.hey.com, 2026-01
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