# How Steve Klabnik actually uses coding agents

Co-author of the Rust book, jj

**If you take one thing:** `rue-overnight-hunt`, bugs filed only with repros. an overnight workflow that fans out bug finders across one compiler subsystem and files only findings whose repro was actually run.

- **Agent:** Claude Code (cli) ([source, 2026-07-31](https://bsky.app/profile/steveklabnik.com/post/3mrvyzjfdac2c))
- **Agent:** Codex (app) ([source, 2026-07-31](https://bsky.app/profile/steveklabnik.com/post/3mrvyzjfdac2c))
- **Model:** Claude Fable ([source, 2026-07-04](https://bsky.app/profile/steveklabnik.com/post/3mpted2uoec2n))
- **Model:** GPT Sol ([source, 2026-07-11](https://bsky.app/profile/steveklabnik.com/post/3mqexwgdemk2q))
- **Review:** Codex reviews Fable's PRs; humans stay responsible for what they submit ([source, 2026-08-12](https://bsky.app/profile/steveklabnik.com/post/3mstwd7yyyk2g))
- **At once:** 90 agents ([source, 2026-07-06](https://bsky.app/profile/steveklabnik.com/post/3mpz2kteeik25))
- **Harness:** Claude Code and the Codex app side by side, bridged by copy/paste; a jj workspace per agent ([source, 2026-07-31](https://bsky.app/profile/steveklabnik.com/post/3mrvyzjfdac2c))
- **Rules file:** AGENTS.md (257 lines, tool-neutral), CLAUDE.md points to it ([source, 2026-09-05](https://github.com/rue-language/rue/blob/5200b119000163884fb28310fd49107c662761af/AGENTS.md#L3-L5))
- **Skills:** integrate-worker ([source, 2026-09-03](https://github.com/rue-language/rue/tree/5200b119000163884fb28310fd49107c662761af/.claude/skills))
- **Hooks:** bookmark-guard (PreToolUse on Edit/Write: blocks edits on a pushed PR branch), SessionStart: source ~/.profile ([source, 2026-07-28](https://github.com/rue-language/rue/blob/5200b119000163884fb28310fd49107c662761af/.claude/hooks/bookmark-guard.sh#L2-L4))

## In their words

> claude code and the codex app. i copy/paste things between them when i want them to talk to each other, nothing fancy yet

> claude code and the codex app. i copy/paste things between them when i want them to talk to each other, nothing fancy yet

> During a loop overnight, Fable found a heap overflow in @rue-lang.dev’s standard library

> Okay I am digging Sol. Like a lot

Sorry Claude

> >   8/90 agents done

listen


Archetype (our label): Orchestrator. Newest source: 2026-09-05.
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