3–8 Codex agents, one folder, one 800-line AGENTS.md

Run 3–8 Codex agents in one folder with a single AGENTS.md. Solo dev on a ~300k LOC TypeScript app.

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what to steal

Have parallel agents make small atomic commits in one folder; swap MCPs for CLIs.

Our takeaway from the source, not a quote.

Drawn from this card's sourced fields. Amber = older model named by the source. Rose = cut or replaced.

steipete-codex-grid.toml

# Run 3–8 Codex agents in one folder with a single AGENTS.md
# source: https://steipete.me/posts/just-talk-to-it

[rig]
who     = "Solo dev on a ~300k LOC TypeScript app"
author  = "Peter Steinberger"
date    = "not stated"

harness = ["Codex"]
models  = ["gpt-5-codex (mid)"]

[keep]
  - 3–8 parallel agents in a 3x3 terminal grid, mostly same folder
  - Agents make atomic git commits
  - ~800-line AGENTS.md symlinked to CLAUDE.md
  - tmux for background tasks
  - chrome-devtools-mcp
  - Slash commands: /commit, /automerge, /massageprs, /review
[cut]
  - Worktrees/PR-per-change
  - Subagents
  - Most MCPs
  - Playwright MCP

⚠ gpt-5-codex: older model(s), named by the source. See current models.

thing	status	why (per source)
Worktrees/PR-per-change	removed	Slower; one dev server
Subagents	replaced	Separate terminal windows
Most MCPs	replaced with CLIs	e.g. gh instead of GitHub MCP ("23k tokens gone")
Playwright MCP	replaced	by chrome-devtools-mcp

Source: https://steipete.me/posts/just-talk-to-it · https://github.com/steipete/agent-scripts · checked 2026-10-14

One task, one thread, so bad corrections die with it

steal → Start a fresh thread per task; carry over only the memory you mean to.

Codex Long shared threads

by Niv Asayag (@niv_ai)

~/rigs/paulund-herdr-cli.toml2026-10-05

Three desktop apps out, one terminal multiplexer in

steal → Use one session view for all CLIs instead of one app per harness.

CodexClaude CodeOpenCode Codex / Claude Code /

by Paulund

~/rigs/hboon-one-config-three-agent….toml2026-06-27

One config folder, symlinked into three agents

steal → Keep one AGENTS.md and skills folder; symlink it into every harness.

DroidClaude CodeCodex Per-harness config cop

by Hwee-Boon Yar