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  Please read the Show HN rules and tips before posting. You can browse the newest Show HNs here.                                                                    
                                                                                                                                                                     
                                                                                                                                                                     
 1.                                                      Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein ( qunabu.github.io )         
     171 points by qunabu 20 hours ago | 39 comments                                                                                                                 
                                                                                                                                                                     
 2.                                                      Show HN: GentleOS – A pair of hobby OSes for vintage 32-bit and 16-bit PCs ( github.com/luke8086 )          
     108 points by luke8086 19 hours ago | 94 comments                                                                                                               
                                                                                                                                                                     
 3.                                                      Show HN: Resonate – Low-latency, high-resolution spectral analysis ( alexandrefrancois.org )                
     34 points by arjf 10 hours ago | 11 comments                                                                                                                    
                                                                                                                                                                     
 4.                                                      Show HN: Nucleus – A security-hardened, Nix-native container runtime ( github.com/sig-id )                  
     27 points by 0kenx 8 hours ago | 6 comments                                                                                                                     
                                                                                                                                                                     
 5.                                                      Show HN: Cost.dev (YC W21) – making agents cost-aware and cheaper to call ( cost.dev )                      
     47 points by akh 15 hours ago | 27 comments                                                                                                                     
                                                                                                                                                                     
 6.                                                      Show HN: Performative-UI – A react component library of design tropes ( vorpus.github.io )                  
     1138 points by lizhang 1 day ago | 205 comments                                                                                                                 
                                                                                                                                                                     
 7.                                                      Show HN: Learn from 30 historical figures, open source, nonprofit, self-hosted ( github.com/chipmates )     
     40 points by micstradev 16 hours ago | 20 comments                                                                                                              
                                                                                                                                                                     
 8.                                                      Show HN: Sum Type and Type Matching in C ( github.com/brightprogrammer )                                    
     2 points by brightprogramer 5 hours ago | discuss                                                                                                               
                                                                                                                                                                     
 9.                                                      Show HN: Gitdot – A better GitHub. Open-source, written in Rust ( gitdot.io )                               
     315 points by baepaul 1 day ago | 296 comments                                                                                                                  
                                                                                                                                                                     
10.                                                      Show HN: Maillune – Embeddable drag-and-drop email editor as a single component ( maillune.com )            
     5 points by gustavssondev 11 hours ago | discuss                                                                                                                
                                                                                                                                                                     
11.                                                      Show HN: KnowledgeMCP – Turn any docs into an MCP endpoint (0 LLM at query time) ( github.com/hashwnath )   
     2 points by Hashwanths 7 hours ago | discuss                                                                                                                    
                                                                                                                                                                     
12.                                                      Show HN: Open-source version of Anthropic's internal analytics engine ( github.com/kaelio )                 
     12 points by lucamrtl 15 hours ago | 2 comments                                                                                                                 
                                                                                                                                                                     
13.                                                      Show HN: LANCommander v2.1.0 – New Avalonia-based launcher ( lancommander.app )                             
     6 points by pathartl 11 hours ago | discuss                                                                                                                     
                                                                                                                                                                     
14.                                                      Show HN: OpenYabby, voice-controlled multi-agent orchestrator for Claude Code ( github.com/openyabby )      
     7 points by idovmamane 11 hours ago | discuss                                                                                                                   
                                                                                                                                                                     
15.                                                      Show HN: The agent that builds and operates its own SaaS tools ( craftbot.live )                            
     8 points by zfoong 8 hours ago | 5 comments                                                                                                                     
                                                                                                                                                                     
16.                                                      Show HN: Live audit log of every command, file, network connection by Claude ( github.com/yeet-src )        
     4 points by r3tr0 9 hours ago | discuss                                                                                                                         
                                                                                                                                                                     
17.                                                      Show HN: Command Center, the AI coding env for people who care about quality ( cc.dev )                     
     61 points by Darmani 1 day ago | 30 comments                                                                                                                    
                                                                                                                                                                     
18.                                                      Show HN: A minimal linear algebra library in pure Go ( github.com/igomez10 )                                
     4 points by igomeza 10 hours ago | discuss                                                                                                                      
                                                                                                                                                                     
19.                                                      Show HN: Elah – A browser-native, frame-accurate video editor ( github.com/elahlabs )                       
     3 points by paulSpaurgen 10 hours ago | discuss                                                                                                                 
                                                                                                                                                                     
20.                                                      Show HN: LocalCode – turn plain English into CLI commands with Apple's local AI ( github.com/localcodeai )  
     3 points by rahlokzero 10 hours ago | discuss                                                                                                                   
                                                                                                                                                                     
21.                                                      Show HN: Mach – A compiled systems language looking for contributions ( github.com/octalide )               
     30 points by octalide 1 day ago | 27 comments                                                                                                                   
                                                                                                                                                                     
22.                                                      Show HN: Lathe – Use LLMs to learn a new domain, not skip past it ( github.com/devenjarvis )                
     395 points by devenjarvis 2 days ago | 72 comments                                                                                                              
                                                                                                                                                                     
23.                                                      Show HN: BibTeX-format, an Emacs compatable BibTeX formatter ( gitlab.com/smaller-infinity )                
     4 points by smaller-infinty 11 hours ago | discuss                                                                                                              
                                                                                                                                                                     
24.                                                      Show HN: I applied Lyapunov stability theory to detect when LLM agents spiral ( github.com/vishal-dehurdle )
     3 points by visha1v 12 hours ago | 1 comment                                                                                                                    
                                                                                                                                                                     
25.                                                      Show HN: NoSuggest – Watch YouTube without the recommendation algorithm ( nosuggest.com )                   
     58 points by VJ-2-108 2 days ago | 61 comments                                                                                                                  
                                                                                                                                                                     
26.                                                      Show HN: I Derived a Pancake ( absurdlyoptimized.com )                                                      
     335 points by bkazez 2 days ago | 136 comments                                                                                                                  
                                                                                                                                                                     
27.                                                      Show HN: Nodea, an open-source AI canvas for working through complex projects ( nodea.ai )                  
     4 points by ElliottCrosby 14 hours ago | discuss                                                                                                                
                                                                                                                                                                     
28.                                                      Show HN: Startup sci-fi novel that took me 5 years to write ( blockchainednovel.com )                       
     22 points by mck- 1 day ago | 11 comments                                                                                                                       
                                                                                                                                                                     
29.                                                      Show HN: Formally verified polygon intersection – Opus 4.8 oneshots, prev failed ( github.com/schildep )    
     93 points by permute 4 days ago | 21 comments                                                                                                                   
                                                                                                                                                                     
30.                                                      Show HN: Kyushu – A self-hostable WASM sandbox for JavaScript workers ( kyushu.dev )                        
     83 points by le_chuck 2 days ago | 39 comments                                                                                                                  
                                                                                                                                                                     
                                                                                                                                                                     
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