135 lines
4.7 KiB
Plaintext
135 lines
4.7 KiB
Plaintext
[1]Simon Willison’s Weblog
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[2]Subscribe
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[3]Just Talk To It - the no-bs Way of Agentic Engineering. Peter Steinberger's
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long, detailed description of his current process for using Codex CLI and GPT-5
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Codex. This is information dense and full of actionable tips, plus plenty of
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strong opinions about the differences between Claude 4.5 an GPT-5:
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While Claude reacts well to 🚨 SCREAMING ALL-CAPS 🚨 commands that threaten
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it that it will imply ultimate failure and 100 kittens will die if it runs
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command X, that freaks out GPT-5. (Rightfully so). So drop all of that and
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just use words like a human.
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Peter is a heavy user of parallel agents:
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I've completely moved to codex cli as daily driver. I run between 3-8 in
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parallel in a 3x3 terminal grid, most of them [4]in the same folder, some
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experiments go in separate folders. I experimented with worktrees, PRs but
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always revert back to this setup as it gets stuff done the fastest.
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He shares my preference for CLI utilities over MCPs:
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I can just refer to a cli by name. I don't need any explanation in my
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agents file. The agent will try $randomcrap on the first call, the cli will
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present the help menu, context now has full info how this works and from
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now on we good. I don't have to pay a price for any tools, unlike MCPs
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which are a constant cost and garbage in my context. Use GitHub's MCP and
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see 23k tokens gone. Heck, they did make it better because it was almost
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50.000 tokens when it first launched. Or use the gh cli which has basically
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the same feature set, models already know how to use it, and pay zero
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context tax.
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It's worth reading the [5]section on why he abandoned spec driven development
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in full.
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Posted [6]14th October 2025 at 9:26 pm
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Recent articles
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• [7]A new SQL-powered permissions system in Datasette 1.0a20 - 4th November
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2025
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• [8]New prompt injection papers: Agents Rule of Two and The Attacker Moves
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Second - 2nd November 2025
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• [9]Hacking the WiFi-enabled color screen GitHub Universe conference badge -
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28th October 2025
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[10] ai 1658 [11] generative-ai 1463 [12] llms 1430 [13]
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ai-assisted-programming 265 [14] model-context-protocol 22 [15] coding-agents
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88 [16] claude-code 51 [17] codex-cli 10 [18] parallel-agents 6
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Monthly briefing
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Sponsor me for $10/month and get a curated email digest of the month's most
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important LLM developments.
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Pay me to send you less!
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[19] Sponsor & subscribe
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• [20]Colophon
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• ©
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• [21]2002
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• [22]2003
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• [23]2004
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• [24]2005
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• [25]2006
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• [26]2007
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• [27]2008
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• [28]2009
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• [29]2010
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• [30]2011
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• [31]2012
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• [32]2013
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• [33]2014
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• [34]2015
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• [35]2016
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• [36]2017
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• [37]2018
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• [38]2019
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• [39]2020
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• [40]2021
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• [41]2022
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• [42]2023
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• [43]2024
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• [44]2025
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References:
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[1] https://simonwillison.net/
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[2] https://simonwillison.net/about/#subscribe
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[3] https://steipete.me/posts/just-talk-to-it
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[4] https://x.com/steipete/status/1977771686176174352
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[5] https://steipete.me/posts/just-talk-to-it#do-you-do-spec-driven-development
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[6] https://simonwillison.net/2025/Oct/14/
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[7] https://simonwillison.net/2025/Nov/4/datasette-10a20/
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[8] https://simonwillison.net/2025/Nov/2/new-prompt-injection-papers/
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[9] https://simonwillison.net/2025/Oct/28/github-universe-badge/
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[10] https://simonwillison.net/tags/ai/
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[11] https://simonwillison.net/tags/generative-ai/
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[12] https://simonwillison.net/tags/llms/
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[13] https://simonwillison.net/tags/ai-assisted-programming/
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[14] https://simonwillison.net/tags/model-context-protocol/
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[15] https://simonwillison.net/tags/coding-agents/
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[16] https://simonwillison.net/tags/claude-code/
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[17] https://simonwillison.net/tags/codex-cli/
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[18] https://simonwillison.net/tags/parallel-agents/
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[19] https://github.com/sponsors/simonw/
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[20] https://simonwillison.net/about/#about-site
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[21] https://simonwillison.net/2002/
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[22] https://simonwillison.net/2003/
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[23] https://simonwillison.net/2004/
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[24] https://simonwillison.net/2005/
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[25] https://simonwillison.net/2006/
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[26] https://simonwillison.net/2007/
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[27] https://simonwillison.net/2008/
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[28] https://simonwillison.net/2009/
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[29] https://simonwillison.net/2010/
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[30] https://simonwillison.net/2011/
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[31] https://simonwillison.net/2012/
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[32] https://simonwillison.net/2013/
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[33] https://simonwillison.net/2014/
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[34] https://simonwillison.net/2015/
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[35] https://simonwillison.net/2016/
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[36] https://simonwillison.net/2017/
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[37] https://simonwillison.net/2018/
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[38] https://simonwillison.net/2019/
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[39] https://simonwillison.net/2020/
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[40] https://simonwillison.net/2021/
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[41] https://simonwillison.net/2022/
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[42] https://simonwillison.net/2023/
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[43] https://simonwillison.net/2024/
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[44] https://simonwillison.net/2025/
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