<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: marcuslima</title><link>https://news.ycombinator.com/user?id=marcuslima</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Thu, 06 Aug 2026 07:15:57 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=marcuslima" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by marcuslima in "Show HN: AI that calls businesses so you don't have to"]]></title><description><![CDATA[
<p>Thanks! Yea it started as a bit of an anger management project. I am the absolute worst version of myself when forced to endure customer service calls.<p>1. The user (you) needs to provide it in the prompt for the call. I have ideas for being able to build memory context for each user so you wouldnt have to re-provide those details each time you want to make a call and instead pull it from memory bank, but thats not implemented yet.<p>2. So far I have actually never been called out for not being a human. I think thats in part because these people probably get a lot of pretty crazy calls and by comparison a slightly robotic over-the-phone voice has a lot of forgiveness. When you know, its easy to hear though. I did build it with Elevenlabs TTS to make the voice as natural as possible. Models have gotten much faster and so latency feels good, not outstanding<p>3. So this IS very interesting, I have to refine the system prompt extensively to get it to the right balance of objection handling without being weird and obviously non-human. It is very clearly on the side of the human, in fact in the NYT case it was initially told no but pressed ahead anyway. "I understand that, how do we move forward" "any other way we can resolve this" that kind of thing. Better still, customer service has a very high abr for hanging up the phone,so the persistency is very effective<p>Yes I think the API holds real potential. The space is busy, but I think there could be room for being the simplest possibel way to make a phone call programmatically. There would be less customization than a Vapi or Bland, but it would take 10 minutes to implement. Basically anywhere engineers experience automated workflows breaking because the real world requires a phone call. Voice probably wouldn't be core to these users business though, int hat case they'd want more control than we would offer.<p>Let me know if you have any issues trying it! Very curious to see how folks end up breaking it. We have a discord you can join here (<a href="https://discord.gg/2tn2ugXu" rel="nofollow">https://discord.gg/2tn2ugXu</a>) if you have any problems to troubleshoot (or email me!)</p>
]]></description><pubDate>Tue, 03 Feb 2026 17:54:05 +0000</pubDate><link>https://news.ycombinator.com/item?id=46874456</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=46874456</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46874456</guid></item><item><title><![CDATA[Show HN: AI that calls businesses so you don't have to]]></title><description><![CDATA[
<p>I absolutely hate being forced to make a phone call. It’s a 1970s solution for 2026. When something goes wrong with a subscription, delivery, or account, the only remaining option is often a phone call where you have to navigating phone trees, wait on hold, and then you have to call again when inevitably the solve didn’t work or was ignored and inexplicably they do not have the context from your last call.<p>My friend and I hacked together Pamela over the new year to make those customer service calls on your behalf and report back with a summary of what happened (<a href="https://www.thisispamela.com/" rel="nofollow">https://www.thisispamela.com/</a>).<p>You prompt it with who to call and what you want to accomplish, provide any relevant context, and it places the call. You can monitor progress via live transcripts or listen in. The agent can navigate phone trees (“press 1 for…”) or speak directly to a human when needed.<p>I now use this for everything from calling up my local super popular bakery to reserve a croissant before they run out, to calling the New York Times to request a refund when they moved me from the promo rate to their regular rate (it worked!).<p>This is early and imperfect. Some calls fail, and some situations still require the account holder to intervene. But it already works often enough to be genuinely useful.<p>(There’s also an API underneath this for anyone who wants to experiment programmatically: <a href="https://docs.thisispamela.com/" rel="nofollow">https://docs.thisispamela.com/</a>)</p>
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<p>Comments URL: <a href="https://news.ycombinator.com/item?id=46873719">https://news.ycombinator.com/item?id=46873719</a></p>
<p>Points: 2</p>
<p># Comments: 2</p>
]]></description><pubDate>Tue, 03 Feb 2026 17:06:05 +0000</pubDate><link>https://www.thisispamela.com</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=46873719</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46873719</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Carbon Crusher (YC W22) – Carbon Negative Roads"]]></title><description><![CDATA[
<p>Awesome, impactful concept, this can be huge! Now comes the challenge of scaling</p>
]]></description><pubDate>Thu, 24 Mar 2022 23:40:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=30796943</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=30796943</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30796943</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Yep, absolutely right! Combining our product with something like the carbon curing tech of Solidia or CarbonCure would make a net-negative concrete. I don't consider us competitors at all!</p>
]]></description><pubDate>Tue, 03 Aug 2021 11:54:45 +0000</pubDate><link>https://news.ycombinator.com/item?id=28048151</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28048151</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28048151</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Same idea for iron!</p>
]]></description><pubDate>Tue, 03 Aug 2021 09:42:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=28047275</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28047275</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28047275</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Agreed!</p>
]]></description><pubDate>Tue, 03 Aug 2021 09:41:39 +0000</pubDate><link>https://news.ycombinator.com/item?id=28047272</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28047272</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28047272</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Impressive analysis! Missed out on a couple details, but I'll take that as a thoroughly researched/analyzed endorsement. Most importantly, we'll be scaling up a lot faster. Our current 1t/yr is just a demo. Our current roadmap is scaling up to a 300t/yr pilot in the next few months before setting up building a commercial plant (10kt+) in the second half of next year. Any chance we can poach you from Google? ;)</p>
]]></description><pubDate>Tue, 03 Aug 2021 09:40:44 +0000</pubDate><link>https://news.ycombinator.com/item?id=28047270</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28047270</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28047270</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Absolutely! This is a big part of our thinking for how this integrates with future energy systems based on renewables. We'd offtake cheap electricity when oversupplied, like in California right now</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:51:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046999</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046999</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046999</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Our process produces calcium carbonate, CaCO3, which cement producers can then burn to make quicklime, CaO. This does release CO2 but that CO2 has been captured from the atmosphere in the process of making that calcium carbonate. We only address process emissions (ie. splitting CO2 from CaCO3), but we do also produce hydrogen on-site, which can be used to replace fossil fuels in generating the requisite heat</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:41:01 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046955</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046955</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046955</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Yeah absolutely, the CO2 balance comes from re-equilibration with the atmosphere. The rivers replenish calcium content on a longer time scale. But as you point out we're in no danger of running out of calcium in the oceans</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:38:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046942</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046942</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046942</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>We make CaCO3, I mention CaO here because that's what cement producers ultimately need. They heat up limestone (CaCO3) to make CaO</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:30:55 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046907</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046907</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046907</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>All 'waste' we produce we either consume in our process or we're able to sell as a commercial product!<p>Not bad tackling ocean acidifcation to boot</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:29:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046892</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046892</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046892</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>The ocean is 20x supersaturated with calcium and is constantly being replenished by geological stores of the stuff coming in through rivers. As long as the ecosystem remains supersaturated this shouldn't be a problem for any marine life. Though a slight dislcaimer there is i'm not a marine scientist!</p>
]]></description><pubDate>Tue, 03 Aug 2021 08:19:11 +0000</pubDate><link>https://news.ycombinator.com/item?id=28046832</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28046832</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28046832</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Convenient that ;)</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:48:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043680</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043680</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043680</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Absolutely, CO2 emissions from transport isn't much of an issue compared with the saving. Hopefully someone like Remora will crack that problem anyhow. We'll most likely need to build our plants closer to where the market is though, to limit the financial cost of transportation</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:48:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043677</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043677</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043677</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Thanks! ABsolutely, looking at optimizing time of day we operate will be important. As grids become more dominated by renewables a solution like ours will be able to help stabilize acting as a electricity sink when the wind is blowing too hard or the sun too strong, taking advantage of lower power prices at these times</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:45:48 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043651</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043651</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043651</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Yep! It'll be quite a journey to get there</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:43:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043627</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043627</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043627</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>That's actually the trickiest part of the engineering, but we've managed to make it directly compatible with the an intermittent energy source like solar and wind</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:43:08 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043621</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043621</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043621</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>Will DM you</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:41:02 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043603</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043603</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043603</guid></item><item><title><![CDATA[New comment by marcuslima in "Launch HN: Heimdal (YC S21) – Carbon neutral cement"]]></title><description><![CDATA[
<p>That's part of the CO2 saturation of the ocean. So when we remove that dissolved CO2 that equivalent amount is removed from the atmosphere</p>
]]></description><pubDate>Mon, 02 Aug 2021 22:35:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=28043541</link><dc:creator>marcuslima</dc:creator><comments>https://news.ycombinator.com/item?id=28043541</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28043541</guid></item></channel></rss>