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Kieran Klaassen

Engineer
Last updated: Sep 16, 2026
RoleGM of Cora & EIR · Every
EarnsEngineer
Sources20 cited fields · high confidence
@kieranklaassenkieranklaassenevery.to/@kieran_1355

Builds Cora with Claude Code and a folder-based memory system, then dispatches specialized agents through a compound-engineering loop.

“Build it, use it, trust it, and then orchestrate it.” every.to

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Loadout

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Kieran Klaassen’s loadout

Engineer
Harness
Claude Code
Compound Engineering plugin; /ce-explain after sessions.
Model
Claude Fable 5.1
high
Also uses
Cursor Agents
Runs Cursor agents remotely, e.g. while hiking.
Terminaltmux
ToolsCompound Engineering / /ce-explain+5 more

3 views · 0 equipped

Models

Claude Fable 5.1high
Tested Fable 5.1 over the preceding week and says he trusts it for coding and other work.
x.com, 2026-09 ↗
Cursor Agents
Runs Cursor agents remotely, e.g. while hiking.
x.com, 2026-08 ↗
GPT-6 Astra
Tested Astra as a showy model for vibe coding and landing pages, but not as trustworthy for day-to-day engineering as Fable.
x.com, 2026-09 ↗
GPT-5.4
Also used for specialized work.
every.to, 2026-04 ↗
Gemini Pro 3.1
Also used for specialized work.
every.to, 2026-04 ↗

Editor & terminal

tmux
Every agent gets a pane he can watch live in tmux.
every.to, 2026-04 ↗

Tools

Compound Engineering / /ce-explain
Uses /ce-explain to trace concepts and failures through the Cora codebase.
every.to, 2026-09 ↗
Use Monologue
Uses it to capture ideas offline while hiking.
x.com, 2026-08 ↗
ruby_llm-typesafe / Jev
Recommended trying typesafe Jev through RubyLLM.
x.com, 2026-09 ↗
CLAUDE.md and AGENT.md folder context
Project conventions, architecture, operational memory, and specialized agents turn a folder into a specialist agent.
every.to, 2026-04 ↗
AppSignal, Render logs, Postgres read replica, Intercom, GitHub deploys
Operations-folder skills connect production monitoring, logs, data, support, and deploy history.
every.to, 2026-04 ↗
/hey and /orchestrate
Slash commands for cross-project status and dispatching work to specialized folders.
every.to, 2026-04 ↗

Workflow

  1. 1Read merged diffs to learn, not to verify; let planning, testing, and review agents handle verification.every.to, 2026-09
  2. 2Ask the agent for the mechanics and full system journey, not only the changed lines in a diff.every.to, 2026-09
  3. 3After a session, ask for an explanation and quiz; let tests decide merge while the quiz reveals learning gaps.every.to, 2026-09
  4. 4Use the Plan → Work → Review → Compound loop so each change teaches the next one.every.to
  5. 5Read CLAUDE.md, architecture docs, system report, prompt, then the component-creator agent before working on Cora.every.to, 2026-04
  6. 6Build and use a flow until it is predictable before handing it to the dispatch layer.every.to, 2026-04

Timeline

  1. 2026-09-16Toolsruby_llm-typesafe / Jevx.com, 2026-09
  2. 2026-09-08HarnessClaude Codeevery.to, 2026-09
  3. 2026-09-08ToolsCompound Engineering / /ce-explainevery.to, 2026-09
  4. 2026-09-03Efforthighx.com, 2026-09
  5. 2026-09-03Also usesGPT-6 Astrax.com, 2026-09
  6. 2026-09-01ModelClaude Fable 5.1x.com, 2026-09
  7. 2026-08-18Also usesCursor Agentsx.com, 2026-08
  8. 2026-08-18ToolsUse Monologuex.com, 2026-08
  9. 2026-04-13Also usesGPT-5.4every.to, 2026-04
  10. 2026-04-13Also usesGemini Pro 3.1every.to, 2026-04
  11. 2026-04-13Terminaltmuxevery.to, 2026-04
  12. 2026-04-13ToolsCLAUDE.md and AGENT.md folder contextevery.to, 2026-04

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