<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: lucasfcosta</title><link>https://news.ycombinator.com/user?id=lucasfcosta</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Wed, 15 Apr 2026 00:11:28 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=lucasfcosta" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[Design Docs Considered Harmful]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.lucasfcosta.com/blog/design-docs">https://www.lucasfcosta.com/blog/design-docs</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=47086505">https://news.ycombinator.com/item?id=47086505</a></p>
<p>Points: 4</p>
<p># Comments: 0</p>
]]></description><pubDate>Fri, 20 Feb 2026 11:12:31 +0000</pubDate><link>https://www.lucasfcosta.com/blog/design-docs</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=47086505</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47086505</guid></item><item><title><![CDATA[Design docs are waterfall wearing a hoodie]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.lucasfcosta.com/blog/design-docs">https://www.lucasfcosta.com/blog/design-docs</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=47055618">https://news.ycombinator.com/item?id=47055618</a></p>
<p>Points: 3</p>
<p># Comments: 0</p>
]]></description><pubDate>Wed, 18 Feb 2026 00:55:16 +0000</pubDate><link>https://www.lucasfcosta.com/blog/design-docs</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=47055618</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47055618</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Ask HN: Share your personal website"]]></title><description><![CDATA[
<p>My blog and personal website: <a href="https://lucasfcosta.com" rel="nofollow">https://lucasfcosta.com</a><p>I usually write about Startups, Agile, and CLIs.</p>
]]></description><pubDate>Thu, 15 Jan 2026 15:58:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=46634437</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=46634437</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46634437</guid></item><item><title><![CDATA[Retrospectives]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.lucasfcosta.com/blog/retrospectives">https://www.lucasfcosta.com/blog/retrospectives</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=46039590">https://news.ycombinator.com/item?id=46039590</a></p>
<p>Points: 2</p>
<p># Comments: 0</p>
]]></description><pubDate>Mon, 24 Nov 2025 21:30:50 +0000</pubDate><link>https://www.lucasfcosta.com/blog/retrospectives</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=46039590</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46039590</guid></item><item><title><![CDATA[Why your retrospectives don't work and how to fix them]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.lucasfcosta.com/blog/retrospectives">https://www.lucasfcosta.com/blog/retrospectives</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=45977541">https://news.ycombinator.com/item?id=45977541</a></p>
<p>Points: 1</p>
<p># Comments: 0</p>
]]></description><pubDate>Wed, 19 Nov 2025 09:27:06 +0000</pubDate><link>https://www.lucasfcosta.com/blog/retrospectives</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=45977541</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45977541</guid></item><item><title><![CDATA[Resend is launching inbound emails]]></title><description><![CDATA[
<p>Article URL: <a href="https://resend.com/blog/inbound-emails">https://resend.com/blog/inbound-emails</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=45804970">https://news.ycombinator.com/item?id=45804970</a></p>
<p>Points: 4</p>
<p># Comments: 0</p>
]]></description><pubDate>Mon, 03 Nov 2025 22:02:09 +0000</pubDate><link>https://resend.com/blog/inbound-emails</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=45804970</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45804970</guid></item><item><title><![CDATA[New comment by lucasfcosta in "A brief history of random numbers (2018)"]]></title><description><![CDATA[
<p>This is what I come to HN for.</p>
]]></description><pubDate>Tue, 28 Oct 2025 15:01:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=45733749</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=45733749</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45733749</guid></item><item><title><![CDATA[Resend Acquires Briefer]]></title><description><![CDATA[
<p>Article URL: <a href="https://resend.com/blog/resend-acquires-briefer">https://resend.com/blog/resend-acquires-briefer</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=44798573">https://news.ycombinator.com/item?id=44798573</a></p>
<p>Points: 5</p>
<p># Comments: 1</p>
]]></description><pubDate>Tue, 05 Aug 2025 14:39:58 +0000</pubDate><link>https://resend.com/blog/resend-acquires-briefer</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=44798573</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44798573</guid></item><item><title><![CDATA[Confidence Intervals]]></title><description><![CDATA[
<p>Article URL: <a href="https://briefer.cloud/blog/posts/confidence-intervals/">https://briefer.cloud/blog/posts/confidence-intervals/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=44107224">https://news.ycombinator.com/item?id=44107224</a></p>
<p>Points: 7</p>
<p># Comments: 0</p>
]]></description><pubDate>Tue, 27 May 2025 14:13:28 +0000</pubDate><link>https://briefer.cloud/blog/posts/confidence-intervals/</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=44107224</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44107224</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Find Your People"]]></title><description><![CDATA[
<p>Thanks for writing this, Jessica.<p>This is a great paragraph:<p>> If you want to, you can just decide to shift gears at this point, and no one's going to tell you you can't. You can just decide to be more curious, or more responsible, or more energetic, and no one's going to go look up your college grades and say, "Hey, wait a minute, this person's supposed to be a slacker."<p>I've often seen people get too attached to an unproductive "identity" instead of looking at things as they are. It's way too common for people to fail once and think they're a failure, rather than thinking that they just failed at that particular time.<p>By the way, I remember meeting you during the S23 batch and how genuinely excited you were to meet us, young founders who were just getting started. It does seem like you found your people!</p>
]]></description><pubDate>Fri, 23 May 2025 19:30:56 +0000</pubDate><link>https://news.ycombinator.com/item?id=44075829</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=44075829</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44075829</guid></item><item><title><![CDATA[New comment by lucasfcosta in "How linear regression works intuitively and how it leads to gradient descent"]]></title><description><![CDATA[
<p>Co-author and founder of Briefer here.<p>I used to use em dashes before they were cool. I actually learned about them when I emailed a guy who's a software engineer at Genius and also writes for The New Yorker and The Atlantic.<p>I asked him for tips on how to write well and he recommended that I read Steven Pinker's "The Sense of Style", which uses em dashes exhaustively, and explains when and why one should use them.<p>It also pains me that I can't use them anymore or else people will think an AI did the writing.</p>
]]></description><pubDate>Thu, 08 May 2025 15:44:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=43927280</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=43927280</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43927280</guid></item><item><title><![CDATA[How linear regression works intuitively and how it leads to gradient descent]]></title><description><![CDATA[
<p>Article URL: <a href="https://briefer.cloud/blog/posts/least-squares/">https://briefer.cloud/blog/posts/least-squares/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=43895890">https://news.ycombinator.com/item?id=43895890</a></p>
<p>Points: 334</p>
<p># Comments: 101</p>
]]></description><pubDate>Mon, 05 May 2025 15:05:33 +0000</pubDate><link>https://briefer.cloud/blog/posts/least-squares/</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=43895890</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43895890</guid></item><item><title><![CDATA[Least Squares and the Gradient Descent]]></title><description><![CDATA[
<p>Article URL: <a href="https://briefer.cloud/blog/posts/least-squares/">https://briefer.cloud/blog/posts/least-squares/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=43843142">https://news.ycombinator.com/item?id=43843142</a></p>
<p>Points: 1</p>
<p># Comments: 0</p>
]]></description><pubDate>Wed, 30 Apr 2025 10:13:32 +0000</pubDate><link>https://briefer.cloud/blog/posts/least-squares/</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=43843142</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43843142</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Apache ECharts"]]></title><description><![CDATA[
<p>We've tested almost every visualization library under the sun when building Briefer (<a href="https://briefer.cloud">https://briefer.cloud</a>) and I can confidently say that Apache ECharts is the best.<p>The main issues with other libraries is that they're either:<p>(a) ugly
(b) difficult to use (i.e. having to do things imperatively)
(c) not flexible enough<p>Apache ECharts solve these 3 problems. It's pretty by default, it allows us to mount/calculate the declarative spec for the graphs in the back-end and then only send the desired spec to the front-end so it can render, and it's also extremely flexible to the point we can support everything that traditional BI tools can do.<p>We've never had to extend the lib to do anything new, everything we need is already there.<p>Glad to see this great piece of work on top of HN.</p>
]]></description><pubDate>Tue, 08 Apr 2025 23:33:26 +0000</pubDate><link>https://news.ycombinator.com/item?id=43627489</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=43627489</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43627489</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Money lessons without money: The financial literacy fallacy"]]></title><description><![CDATA[
<p>Most people’s money problems would be solved if we taught them not to chase status instead of focusing on the numbers.<p>Financial literacy itself is quite simple: spend less than you make.<p>Everything else is an optimization and it’s pretty easy to learn with a few days of research.<p>I know this is the classical HackerNews type comment, but I honestly can’t understand why it’s so hard when there’s so much information available and so few pre-requisites (almost none) to learn about it.</p>
]]></description><pubDate>Sat, 22 Feb 2025 10:07:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=43137677</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=43137677</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43137677</guid></item><item><title><![CDATA[Regex Licensing]]></title><description><![CDATA[
<p>Article URL: <a href="https://regexlicensing.org/">https://regexlicensing.org/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=42573762">https://news.ycombinator.com/item?id=42573762</a></p>
<p>Points: 2</p>
<p># Comments: 0</p>
]]></description><pubDate>Thu, 02 Jan 2025 12:13:23 +0000</pubDate><link>https://regexlicensing.org/</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=42573762</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42573762</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Show HN: I built a(nother) house optimized for LAN parties"]]></title><description><![CDATA[
<p>I love this idea so much.<p>Lan parties were probably the best part of my teenage years.<p>Also, the terrace part is amazing.<p>I miss the good old days of playing DotA (the old one) the whole night while drinking coke and eating pizza with friends.</p>
]]></description><pubDate>Sun, 17 Nov 2024 11:00:01 +0000</pubDate><link>https://news.ycombinator.com/item?id=42163406</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=42163406</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42163406</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Show HN: BemiDB – Postgres read replica optimized for analytics"]]></title><description><![CDATA[
<p>Amazing work, guys! Looking forward to seeing where BemiDB is going.</p>
]]></description><pubDate>Thu, 07 Nov 2024 22:45:32 +0000</pubDate><link>https://news.ycombinator.com/item?id=42081956</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=42081956</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42081956</guid></item><item><title><![CDATA[Going open-source as a VC-Backed company]]></title><description><![CDATA[
<p>Article URL: <a href="https://briefer.cloud/blog/posts/open-source-strategy/">https://briefer.cloud/blog/posts/open-source-strategy/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=41500506">https://news.ycombinator.com/item?id=41500506</a></p>
<p>Points: 159</p>
<p># Comments: 83</p>
]]></description><pubDate>Tue, 10 Sep 2024 13:16:28 +0000</pubDate><link>https://briefer.cloud/blog/posts/open-source-strategy/</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=41500506</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41500506</guid></item><item><title><![CDATA[New comment by lucasfcosta in "Show HN: Repaint – a WebGL based website builder"]]></title><description><![CDATA[
<p>I'm obviously biased because we've been in the same YC batch, but I just want to say that one thing that always impressed me about you guys is how obsessed you were with building the best product you could.<p>When you explained how you had just reimplemented the CSS spec I was mindblown.<p>You guys rock. Repaint is amazing.</p>
]]></description><pubDate>Tue, 03 Sep 2024 16:34:43 +0000</pubDate><link>https://news.ycombinator.com/item?id=41436589</link><dc:creator>lucasfcosta</dc:creator><comments>https://news.ycombinator.com/item?id=41436589</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41436589</guid></item></channel></rss>