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Guillaume "G/" Moigneu

@guillaume.id
62 followers 61 following 99 posts

Field CTO @ Upsun. I help leaders and teams augment themselves with AI. The practice, not the commentary. I build production systems and explain them to a CEO. Building gaal (open-source agent access layer) and number6.ai. Writing at guillaume.id.

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Guillaume "G/" Moigneu @guillaume.id · 21/07/2026
Agent routers coordinate model choice, tool execution, and verification across a workflow. Price is one routing input alongside completion rate, latency, available context, and verification cost. That means the router needs to understand the work it is scheduling. #ai #agents #router
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Guillaume "G/" Moigneu @guillaume.id · 17/07/2026
An LLM can challenge your reasoning or rationalize the decision you already wanted. The difference is process. I built Pressure-test decisions to surface assumptions, test uncertainty, and end with a concrete action. I still make the call. The skill forces me to show my work.
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Guillaume "G/" Moigneu @guillaume.id · 13/07/2026
My YouTube research agent has seven workflow steps. Only two stages use an LLM. Code handles fetching, filtering, ranking, caching, and persistence. Models extract transcript evidence and synthesize patterns. Put model calls where ambiguity creates value.
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Guillaume "G/" Moigneu @guillaume.id · 12/06/2026
Really good write-up by Fabien Potencier. Challenges ahead for organizations to fully adopt AI development. Best practices, governance, cost-control, etc. We are all trying to adapt without a clear path, which this article tries to map out. upsun.com/blog/8-stages-ai-engineer…
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Guillaume "G/" Moigneu @guillaume.id · 09/06/2026
6 months running my own AI personal agent and this weekend I hit a wall. Nothing beats strongly typed structured data. Markdown-only agents are painful. Slow, dozens of tool calls, tokens burning for nothing. Do I really need to wait 70 seconds to flip a task from In Progress to Done?
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Guillaume "G/" Moigneu @guillaume.id · 25/05/2026
A great idea inspired by conventional commits: Conventional Comments conventionalcomments.org It's so true that sometimes I don't even know what to do with a comment on a Google Doc. Acknowledge, reply or just close? This would help!
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Guillaume "G/" Moigneu @guillaume.id · 24/05/2026
What are you working on this long weeekend? I've just revamped my AI assistant. After trying so many solutions (Hermes, graphs, etc.) I am back to a way simpler method. Pi + local gemma 4 + markdown files + qmd + Obsidian. Tasks management, journal and my knowledge aggregations all fit in there.
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Guillaume "G/" Moigneu @guillaume.id · 27/02/2026
I wanted to build a lead-catching LLM based chatbot but I had to figure out which defenses were actually worth the complexity. A Chevrolet chatbot agreed to sell a $76K Tahoe for $1 after one prompt injection. guillaume.id/blog/defendi...
guillaume.id
Defending LLM chatbots against prompt injection and topic drift
Practical defenses for LLM chatbots against prompt injection and topic drift, including system-prompt hardening, input validation, output filtering, topic control, and pragmatic architecture choices.
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Guillaume "G/" Moigneu @guillaume.id · 23/02/2026
Quickbit: If you're struggling defining priorities and goals (as a person, a company), take a look at Daniel Miessler's Telos framework. Spent the last hour talking to my laptop to build it! It really helps. github.com/danielmiessl...
github.com
GitHub - danielmiessler/Telos: Telos is an open-sourced framework for creating Deep Context about things that matter to humans.
Telos is an open-sourced framework for creating Deep Context about things that matter to humans. - danielmiessler/Telos
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Guillaume "G/" Moigneu @guillaume.id · 23/02/2026
Your agents.md is probably hurting more than it helps. A new ETH Zurich study tested coding agents across hundreds of real GitHub issues and found that LLM-generated context files reduced success rates by 3% while adding 20% to inference costs.
agents.md
AGENTS.md
AGENTS.md is a simple, open format for guiding coding agents. Think of it as a README for agents.
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Guillaume "G/" Moigneu @guillaume.id · 21/02/2026
I love initiatives like Claude Code Security (even if it's gated for now). But I'm also terrified of them. claude.com/solutions/cl...
claude.com
Claude Code Security | Anthropic by Claude
From scan to fix, seamlessly. Claude scans your codebase for vulnerabilities, validates findings, and recommends patches you can review and approve.
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Guillaume "G/" Moigneu @guillaume.id · 20/02/2026
Average typing speed: 40 WPM. Conversational speech: 130-150 WPM. Your fingers literally can't keep up with your brain. Voice typing fixes that gap. SuperWhisper nails this on macOS. Press a hotkey, talk, text appears. Accurate, offline, fast. But it's Mac-only with no Linux port planned.
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Guillaume "G/" Moigneu @guillaume.id · 19/02/2026
I am not a big fan of OpenClaw (yet) but I find tremendous value in automating simple tasks. I've worked yesterday and my own terminal based assistant: n6. In honor of the beloved Caprica Six. Extensible python terminal utility wrapping Claude. github.com/gmoigneu/n6
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Guillaume "G/" Moigneu @guillaume.id · 18/02/2026
I ran react-doctor on a real production codebase. 88 out of 100. 4 errors across 139 files. Better than I expected and the 4 errors are exactly the kind that bite you in production.
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Guillaume "G/" Moigneu @guillaume.id · 18/02/2026
I'm starting a new AI Weekly series. I was doing that for my own needs but I think it's worth sharing. If you have any good source to add to my tracker let me know! www.linkedin.com/pulse/weekly...
linkedin.com
Weekly AI Review - 2026-02-17
Anthropic closed a staggering $30 billion Series G at a $380 billion valuation. The second-largest venture deal in history as Claude Code's revenue doubled to $2.
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Guillaume "G/" Moigneu @guillaume.id · 18/02/2026
My personal take on how to make coding agents reliable. For me it's all about verification. The limit isn’t the AI. It’s your infrastructure. Build the verification layer, and the autonomy follows. The full article: devcenter.upsun.com/posts/making...
devcenter.upsun.com
Making coding agents (Claude Code, Codex, etc.) reliable
The bottleneck for AI coding agents isn't model capability. It's your verification infrastructure. Here's how to fix that.
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Guillaume "G/" Moigneu @guillaume.id · 11/02/2026
You know that moment when Claude forgets you use pnpm? Again. For the third time today. I got tired of repeating myself. And then I found napkin.
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Guillaume "G/" Moigneu @guillaume.id · 10/02/2026
If you want the slides from my hashtag#AIDay talk about making coding agents reliable, here you go: guillaume.id/pdfs/2026-02... And the 8 pillars verification checklist: gist.github.com/gmoigneu/a96... Thank you Anne-Sophie Norca from dotAI by dotConferences for organizing this!
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Guillaume "G/" Moigneu @guillaume.id · 10/02/2026
What primitives will replace human authorship and review as the foundation of trust? Teams will track "code reading coverage" metrics. But here's the kicker: they'll strategically drive it DOWN in safe areas.
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Guillaume "G/" Moigneu @guillaume.id · 06/02/2026
Just spent way too long nerding out over Claude Opus 4.6 and honestly? feels like a real inflection point for how we work with massive codebases 🤔 #ai #claude #opus #coding
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Reposted by Guillaume "G/" Moigneu
Upsun @upsun.com · 05/02/2026
We’re heading to #AIDay2026! 🤖 Guillaume Moigneu will be on stage talking coding agent readiness. Can't attend? Don't worry, the tech track will be livestreamed 👀 Sign-up here: luma.com/dotAI-techtr... 📍 Paris, France | ⏰ 12:00–12:15 pm CET 👉 ai-day.org/programme/ #AIDay2026 #Upsun #AIEngineering
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Guillaume "G/" Moigneu @guillaume.id · 06/02/2026
Discussing with industry old timers friends yesterday we came up to the same conclusion. Everything is so exciting right now like it was in 1999. At the time I was discovering PHP and started to publish a lot of different projects with my trusty Dreamweaver. But I was feeling so empowered.
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Guillaume "G/" Moigneu @guillaume.id · 14/04/2025
I've always been an advocate of data privacy. And even if we have to put ourselves for professional reasons, we always need to be mindful of the potential risks of doing it. Check out Carole Cadwalladr talk at TED. Worth every second of your time! www.ted.com/talks/carole...
ted.com
This is what a digital coup looks like
“We are watching the collapse of the international order in real time, and this is just the start,” says investigative journalist Carole Cadwalladr. In a searing talk, she decries the rise of the “bro...
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Guillaume "G/" Moigneu @guillaume.id · 17/02/2025
Hello everyone! I wanted to share some thoughts on JD Vance's recent speech at the France AI Summit. I'm really concerned about his stance on regulation. #AISafety #AIRegulation #FranceAISummit #AIEthics #ProfitWithPurpose #AI
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Guillaume "G/" Moigneu @guillaume.id · 02/02/2025
🔥 Vous êtes invité(e) à notre petit-déjeuner pour découvrir comment la durabilité crée un avantage concurrentiel et attire les investissements dans l'écosystème de l'IA⚡️ brnw.ch/21wQitQ 📅 Date: 11 February, 2025 🕗 Time: 09:00 - 11:00 AM 📍 Location: Digital Village Paris
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Guillaume "G/" Moigneu @guillaume.id · 27/01/2025
If you are in Paris for the French AI Summit on Feb 11th, hang around with us for breakfast while we discuss how we can build AI-focused startups and make sure they are as sustainable as we can. A massive challenge for the years to come! #AI #Paris #Sustainability upsun.com/sustainable-...
upsun.com
Breakfast round-table: The Sustainable Edge: How AI Startups Win VC Funding | Side event of France AI Action Summit 2025
Join top VCs and AI founders at France AI Action Summit 2025's exclusive breakfast to learn how sustainability drives competitive advantage and attracts investment in the AI ecosystem. An official sid...
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Guillaume "G/" Moigneu @guillaume.id · 20/01/2025
🚨 Google just dropped Vertex AI RAG Engine (Jan 2025) to help enterprises bridge the gap between flashy LLM demos and actual production use. The reality is most companies struggle with RAG implementation - this is their solution. #AI #MLOps
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Guillaume "G/" Moigneu @guillaume.id · 20/01/2025
Just published a quick article on my eslint / prettier setup for Cursor or VSCode. Have consistent coding rules every time, automagically. dev.to/gmoigneu/set... #webdev #typescript #vscode
dev.to
Setting Up a Rock-Solid Typescript React Project with ESLint and Prettier
A practical guide to setting up a modern TypeScript React project with automated code formatting and quality checks. Learn how to configure ESLint and Prettier, set up VS Code for optimal development,...
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Guillaume "G/" Moigneu @guillaume.id · 20/01/2025
Why I switched from #MySQL to #PostgreSQL - a thread on my database journey 🔄 After years of defaulting to MySQL for every project, I finally made the switch to PostgreSQL. Here's why it was one of the best technical decisions I've made... 🚀
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Guillaume "G/" Moigneu @guillaume.id · 20/01/2025
Cursor is now running commands and parsing the output. If it fails, it adds logging to try to understand what's going on... This editor is changing the way I develop every day. Oh and they raised 105M ... #webdev #ai
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Guillaume "G/" Moigneu @guillaume.id · 09/01/2025
Quoting Yann Leonardi here: "People on LinkedIn don't like what they like, but the content that will reinforce who they want us to think they are.". I love it. This is one of the reasons LinkedIn is a weird place to hang around. [Video in French]
youtube.com
Pourquoi LinkedIn est si BIZARRE ?
YouTube video by Yann Leonardi
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Guillaume "G/" Moigneu @guillaume.id · 05/01/2025
Who remembers Gateway 2000? My first real machine... Pentium 120Mhz. I played Doom like crazy on this thing!
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Reposted by Guillaume "G/" Moigneu
Dr. Julie Gurner @drgurner.bsky.social · 24/12/2024
The struggle is real.
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Guillaume "G/" Moigneu @guillaume.id · 23/12/2024
I guess all the wannabe onlyfans millionaires just discovered BlueSky and the #ai hashtags… my feed is just full of these nowadays. Guess we need new ones for real discussions.
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Guillaume "G/" Moigneu @guillaume.id · 15/12/2024
I’m always impressed by the dedication of some.
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Guillaume "G/" Moigneu @guillaume.id · 15/12/2024
The #UHC CEO story has now provided more coverage than they ever did.
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Guillaume "G/" Moigneu @guillaume.id · 14/12/2024
Good coffee. Good music. Some code. Love these #productive Saturday mornings.
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Guillaume "G/" Moigneu @guillaume.id · 13/12/2024
This picture tells a lot. AI is not the issue. Heartless CEO’s that are proud of putting up campaigns like this are. Add crocs and a new president and we’re not far away from Idiocracy.
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Guillaume "G/" Moigneu @guillaume.id · 08/12/2024
Finally back home from #SymfonyCon. Always so many incredible people there. See you in Amsterdam next year! A huge shoutout to the @upsun.com team for the organization and the talks. 🤗
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Guillaume "G/" Moigneu @guillaume.id · 05/12/2024
And it’s done. How to leverage Transformers in PHP to run Machine Learning models on your app. #SymfonyCon
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Guillaume "G/" Moigneu @guillaume.id · 05/12/2024
Presenting at #SymfonyCon. Let’s hope the gods of PHP and machine learning will be in my favor.
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Guillaume "G/" Moigneu @guillaume.id · 30/11/2024
#BlackFriday is an amazing reminder on how many companies handle your data. #privacy It’s time for a fall cleaning once again.
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Guillaume "G/" Moigneu @guillaume.id · 29/11/2024
Nearly time for #Symfonycon in Vienna! Get a warm coat with a trdelnyk and join us next week!
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Guillaume "G/" Moigneu @guillaume.id · 29/11/2024
Is llmstxt the new #SEO? Let’s have a go at it. llmstxt.org
llmstxt.org
The /llms.txt file – llms-txt
A proposal to standardise on using an /llms.txt file to provide information to help LLMs use a website at inference time.
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Guillaume "G/" Moigneu @guillaume.id · 28/11/2024
Just developed an iOS app in two hours having coffee on the beach. Thanks to @anthropic.com and Cursor. Can’t believe I’m not struggling anymore with Swift.
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Guillaume "G/" Moigneu @guillaume.id · 28/11/2024
Let’s all pray for #sysadmin folks on call tomorrow. #blackfriday. Be strong. May the force be with y’all. @upsun.com
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Guillaume "G/" Moigneu @guillaume.id · 28/11/2024
Happy #Thanksgiving y’all.
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Reposted by Guillaume "G/" Moigneu
Upsun @upsun.com · 26/11/2024
Get your #SymfonyCon Vienna 2024 schedule ready! 🚀 AI enthusiasts and developers 👀 learn to implement ML inference in @symfony.com apps with Guillaume Moigneu. 📍Room: Track Upsun & Smile ⏰ When: Thursday, Dec 5 at 11:10 – 11:45 AM See you there 👉 brnw.ch/21wOZKF
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