1. Dumb Pipe
Total comment counts : 48
Summary
The “Dumb Pipe,” developed by number 0, enables easy direct device connections that circumvent NAT issues and adapt to changing network conditions. It allows users to connect two computers with a single command, utilizing a 200-line wrapper around the iroh rust crate, employing QUIC technology for secure, multiplexed connections. While direct connectivity is sometimes impossible, a mesh network of relay nodes manages UDP traffic over HTTP when needed. Optional features like pubsub and data transfer are available, though adding them means stepping away from the “dumb” functionality.
Top 1 Comment Summary
The article explains how to use ssh combined with socat (or mkfifo) for secure data transmission between a sender and receiver, especially when the target is behind a firewall or NAT. The receiver command utilizes a UNIX socket, while the sender sends data over SSH. It also describes relaying through an SSH server (like ssh-j.com) for added security, using end-to-end encryption. The original discussion can be found in a thread on Hacker News.
Top 2 Comment Summary
The author expresses enthusiasm when products are labeled as “dumb,” suggesting that such items are often more practical. They criticize the abundance of “smart” products that invade privacy and focus on commercializing user data. The desire for straightforward, functional products is highlighted, advocating for simplicity without unnecessary complexity or personal information requirements.
2. Performance and telemetry analysis of Trae IDE, ByteDance’s VSCode fork
Total comment counts : 35
Summary
The analysis of Trae IDE, ByteDance’s fork of Visual Studio Code, revealed significant performance and privacy issues. Trae consumes 3.7 times more processes and 6.3 times more memory than VSCode, with persistent telemetry transmission occurring even when disabled. Network monitoring showed ongoing data transmission to ByteDance servers, including detailed usage data. After reporting issues on Discord, the user faced moderation challenges. Key findings highlight the need for transparency and further community testing. The analysis was conducted using versions 2.0.2 and PRE-2.0.2 in July 2025, with results reproducible using standard monitoring tools.
Top 1 Comment Summary
The article discusses an issue where users change telemetry settings in an editor but do not restart it, despite a pop-up advising that a restart is needed for changes to take effect. The author expresses skepticism about the validity of conclusions drawn from such testing, noting that even though users may re-launch the editor, it is unclear if this properly restarts all necessary components.
Top 2 Comment Summary
TheiaIDE is a reimplementation resembling VSCode, offering a modern development environment with a familiar Eclipse feel. Originally rough, it has improved significantly over the years, with notable users like TI using it to rebuild their Code Composer Studio. TheiaIDE supports Language Server Protocol (LSP) and utilizes the Monaco editor backend, making it a viable alternative for developers who prefer a blend of VSCode and Eclipse aesthetics. For more information, visit theia-ide.org.
3. I hacked my washing machine
Total comment counts : 22
Summary
A user and a friend decided to hack their washing machine as a fun challenge, aiming to connect it to Discord for notifications when laundry cycles finish. They found the machine’s app limited but appreciated its utility. Living in a Victorian house, they faced poor sound transmission from a doorbell, prompting an idea to send notifications to their Discord server using a cheap receiver. After successfully applying this method, they aimed to replicate the process for the washing machine, leveraging the author’s experience in reverse engineering apps. The project highlights both creativity and practical uses in a shared living situation.
Top 1 Comment Summary
The article discusses how to understand and manipulate a device that communicates with an Android app. It highlights the use of tools like apk-mitm for bypassing certificate pinning and using mitmproxy without rooting. It also mentions that apps displaying decrypted data likely contain the decryption key, which can be examined using jadx, though some vendors use native code that requires reverse engineering with Ghidra. The author encourages persistence in code exploration, emphasizing the educational value of the process, even if success isn’t guaranteed.
Top 2 Comment Summary
The author created a solution for forgetting laundry in their Bosch washing machine, located far from their home office. By utilizing the Bosch API, they developed a Home Assistant script that detects when a washing cycle is complete and the door remains closed, indicating wet clothes inside. This setup sends alerts to their phone, and, when applicable, to their wife based on her presence at home, notifying them every 15 minutes about the wet laundry. The system is simple and effective, with plans to switch to a locally hosted option.
4. 4k NASA employees opt to leave agency through deferred resignation program
Total comment counts : 58
Summary
Nearly 4,000 NASA employees have opted to leave the agency through a deferred resignation program, reducing its workforce from 18,000 to about 14,000, as part of the Trump administration’s efforts to cut the federal workforce. This includes normal attrition of 500 workers and follows proposed budget cuts of 24% for the agency. While Congress is discussing maintaining current funding levels, more than 300 current and former employees criticized the planned cuts in a letter to the interim NASA administrator, arguing that they harm NASA’s mission and undermine public interests.
Top 1 Comment Summary
The article argues that, while the Space Launch System (SLS) is inefficient, it is not the primary focus of budget cuts at NASA. Instead, crucial science missions are being defunded, undermining the U.S.’s leadership in space science and driving out experts behind significant projects like Hubble and JWST. This loss of capacity could hinder progress for a generation. The author also notes that private companies like SpaceX do not engage in scientific research, emphasizing the unique role of NASA in the field.
Top 2 Comment Summary
The article highlights significant funding cuts within NASA’s Science divisions, leading to the defunding of projects and the voluntary departure of employees. Entire divisions, particularly focused on deep space observation, have seen over 80% of their staff cut, resulting in many astrophysics PhDs losing their jobs without prospects in the private sector. These individuals, who dedicated their careers to research and accepted lower salaries as civil servants, are now left without resources or work opportunities.
5. Tom Lehrer has died
Total comment counts : 54
Summary
The article is a prompt requesting users to enable JavaScript and disable any ad blockers in their web browser. This action is likely necessary for optimal website functionality and to ensure that ads, which may be essential for site revenue, are displayed properly.
Top 1 Comment Summary
Tom Lehrer has permanently relinquished all copyrights to his songs, placing them in the public domain. This includes songs with lyrics he wrote and those set to music by others. Anyone can perform, record, or create parodies of his work without seeking permission or paying fees. Lehrer emphasizes that he retains no rights, inviting individuals to freely use his music and lyrics. He also notes that his website will be shutting down soon, urging users to download any desired content before it disappears.
Top 2 Comment Summary
The article reflects on Tom Lehrer’s obituary, noting it was pre-written and not updated with the revelation about his sensitive NSA work, originally disguised as a role at the Atomic Energy Commission. It humorously points out the New York Times has published outdated and incorrect information, reminiscing about past journalistic errors, specifically referencing Judith Miller.
6. Return of wolves to Yellowstone has led to a surge in aspen trees
Total comment counts : 24
Summary
Gray wolves were reintroduced to Yellowstone National Park in 1995 to manage elk populations, which were damaging young aspen trees. This initiative has led to a resurgence of aspen growth, with the first new saplings seen in 80 years. Elk numbers have significantly decreased, allowing aspen to thrive in surveyed areas. However, an increase in bison populations poses new challenges for aspen recovery. The study highlights the ecological benefits of restoring top predators, which positively impact biodiversity and ecosystem balance.
Top 1 Comment Summary
The reintroduction of wolves in Yellowstone has significantly transformed the ecosystem. Elk have moved away from streams, allowing willow and cottonwood to thrive, which stabilizes soil and narrows river channels. This new vegetation supports beaver populations, rising from one colony in 1996 to twelve in fifteen years, which helps rebuild wetlands and raise water tables. As a result, riparian zones have improved, leading to deeper, colder pools and an increase in native trout and songbird nests.
Top 2 Comment Summary
The article discusses the debate surrounding the claim that the reintroduction of wolves in Yellowstone National Park significantly altered the ecosystem, particularly river flow. It highlights that some scientists have debunked this myth, suggesting that the impact of wolves on the ecosystem is not as profound as previously thought. The article raises questions about ongoing dissenting opinions and the current state of consensus in the scientific community regarding this topic. For further details, you can refer to the original article linked above.
7. Ask HN: What are you working on? (July 2025)
Total comment counts : 434
Summary
The article discusses a project aiming to develop a 40-gram drone designed to target and reduce mosquito populations, likening it to a “Roomba for mosquitoes.” This drone is proposed as a faster, more efficient alternative to traditional insecticide spraying methods, with the goal of competing against insecticide-treated nets (ITNs) in combating malaria. The technology uses micro-doppler signatures to distinguish mosquitoes from other flying insects, ensuring that beneficial pollinators remain unaffected. The innovative engineering presents a potential solution to declining insect populations and emerging pest challenges.
Top 1 Comment Summary
The authors are developing “Tornyol,” a mosquito-killing drone that utilizes ultrasonic sonar for detection and missile control theory to eliminate mosquitoes by grinding them in its propellers. Weighing only 40 grams, this tinywhoop drone is designed for quiet operation and can cover large areas quickly, making it more efficient than traditional insecticide methods. Their goal is to compete with insecticide-treated nets in the fight against malaria.
Top 2 Comment Summary
The article discusses fabric construction blocks, which function like a clothing version of Lego. These blocks allow users to create clothing and accessories entirely by hand, without the need for tools or machines. An introductory video is available for viewers to learn more.
8. Coronary artery calcium testing can reveal plaque in arteries, but is underused
Total comment counts : 24
Summary
The article requests users to enable JavaScript and disable any ad blockers to access content properly.
Top 1 Comment Summary
Before undergoing a CAC scan, consider testing for ApoB, Lp(a), hs-CRP, HbA1c, and eGFR. These tests can identify hidden heart disease risks, as many individuals with normal cholesterol may still have abnormal ApoB levels, and Lp(a) is a significant hereditary factor. Inflammation (hs-CRP) and insulin resistance (HbA1c) also raise risk levels, while eGFR assesses kidney function relevant to heart disease models. Notably, most of these risk factors can be modified through lifestyle changes and medication. CAC scans detect calcified plaque, but the mentioned tests help identify earlier signs of soft plaque buildup.
Top 2 Comment Summary
A 57-year-old man experienced chest pains while playing tennis, leading to a series of tests. Despite no prior symptoms and a healthy lifestyle, a CAC scan revealed a high calcium score of 411, and a stress test showed significant blood flow issues. Cardiac catheterization revealed 95% blockage in the Left Anterior Descending artery, requiring two stents. The man emphasizes the importance of the CAC scan, suggesting it can identify life-threatening issues even in asymptomatic individuals. He feels fortunate to have avoided a serious incident that day.
9. Chemical process produces critical battery metals with no waste
Total comment counts : 10
Summary
The article describes a specific cache server, identified as “cache-sjc1000101-SJC,” with the reference numbers 1753736023 and 1309759739. It highlights its function as a Varnish cache server, which is typically used to improve web performance by caching content. However, specific details are marked as “forbidden,” indicating limitations on the information shared about the server.
Top 1 Comment Summary
Many ores are byproducts of mining other ores. For example, helium comes from natural gas extraction, and selenium and cobalt are derived from copper mining. As demand for byproducts like indium rises—often surpassing that of the main ore (zinc)—prices can dramatically increase. While alternative sources of these metals exist, they are not economically viable. Developing infrastructure for efficient, clean processing of these byproducts is essential.
Top 2 Comment Summary
Olivine is a notable mineral due to its stability at high temperatures, making it suitable for refractory sand in foundries. However, it reacts with CO₂ at room temperature, converting to serpentine, which raises concerns about using olivine sand to combat global warming. While olivine is abundant in the Earth’s mantle and could provide significant iron and magnesium resources, extracting it poses challenges. Additionally, magnesium hydroxide (milk of magnesia) serves both as a metallic source and a refractory insulator, also containing economically viable levels of nickel and cobalt.
10. Fast and cheap bulk storage: using LVM to cache HDDs on SSDs
Total comment counts : 19
Summary
The article discusses the evolution of storage options, particularly the benefits of solid-state drives (SSDs) over traditional hard disk drives (HDDs). As SSD prices decline, using HDDs for larger storage has become less relevant, except in specific cases where caching on SSDs offers speed advantages for frequently accessed data. The author shares their experience in setting up a cached RAID array using Linux’s Logical Volume Manager (LVM) and RAID 1 for reliability. They emphasize the importance of careful data management and choosing appropriate storage setups to mitigate the risk of HDD failures.
Top 1 Comment Summary
LVM (Logical Volume Manager) is a powerful tool that goes beyond basic partitioning, offering features like RAID, device migration, integrity checking, caching, writable snapshots, and thin provisioning. Instead of layering RAID on top of LVM, it’s more effective to utilize LVM’s flexibility directly within a single volume group (VG). Individual logical volumes (LVs) can have different RAID levels. However, caution is advised with thin provisioning due to potential performance issues and faults. Overall, LVM enhances storage management significantly compared to traditional methods.
Top 2 Comment Summary
The author discusses caching access patterns, highlighting ext4 journals’ efficiency due to their small size and high IOPS. For improved performance, they’ve successfully used external journals on SSDs with slow SMR disks. However, this creates a single point of failure; losing the SSD can lead to data loss from multiple disks. In their experience with HDFS, a JBOD layout is preferred to RAID for better node failure tolerance and efficient metadata handling. The cost of SSDs has significantly decreased over the past decade.