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Signal Over Noise — by Doneyli

Practitioner AI insights from a Principal AI Architect with 20+ years in data and AI. Free: frameworks and signal analysis. Paid: full "I Built X" tutorials with production code. Less Noise. More Signal.

Newsletter · By Doneyli De Jesus · Official site

Indexed issues, last 90 days
9
Latest publication
Sep 23, 2026
Audience
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Earliest in this view
Jul 4, 2026

Latest issues

  1. Issue · Sep 23, 2026

    Your AI Bill Has No Owner (opens the original)

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    Half an hour. That is what a senior executive at an AI-forward company asked me for last week: a straight conversation about where the AI market and the vendor ecosystem actually stand, no pitch running in either direction.I could have followed up with a deck. Instead, I sat back down at my kitchen table and drew three boxes. The first one came out crooked. The middle one said “CLOUD ???” before I went back and fixed the label. By the third box I finally had the thing I meant to draw in the firs

  2. Issue · Sep 20, 2026

    AI is going to kill us? (opens the original)

    Excerpt · Critical tone

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    My mom called me over the weekend, genuinely worried, telling me to stop using AI because apparently it is going to kill us all.She saw CNN or some other major news outlet talking about what this guy Jacob was tweeting.Subscribe nowThat there is more than a 10% chance of human extinction from AI within the next decade. I understand why it lands hard.That is a serious thing to hear from your mom. And it is a serious thing for him to say.A few day

  3. Issue · Aug 22, 2026

    I went all in on Claude. That wasn't the mistake. (opens the original)

    Excerpt · Critical tone

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    This is a Build Log. Follow along to get the steps for building it yourself.Two hours and twelve minutes. On Tuesday afternoon, August 18, that is how long I had no working access to Claude. Every request came back an error, and the agents I run my week on went quiet mid-task.<div cl

  4. Issue · Aug 8, 2026

    DO the work. Don't just talk about the work (opens the original)

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    <img alt="" class="sizing-normal" height="2184" src="https://substackcdn.com/image/fetch/$s_!wzm3!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fcfe07b60-7626-401a-9294-cde809bd6e5b_2133x3200.

  5. Issue · Aug 4, 2026

    Are You Improving the Judge or the Agent? (opens the original)

    Excerpt · Critical tone

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    Forty minutes into a working session with a regulated enterprise AI team, someone drew a box on the shared screen and called it the eval dataset. One box.Everything around that box was in decent shape. Real use case, real model, real pipeline, and a list of eight evaluator names lifted off a docs page: correctness, groundedness, toxicity, tone, tool-use accuracy, refusal rate, response-time compliance, hallucination. What the room did not have was an answer to the question I ask before any of th

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