[{"id":"92cf9d27-cb1b-4466-b99c-9d7f58cd1d11","thread_id":"69bd863b-7b5c-4b56-a720-6dfb4f1201f5","created_at":"2026-05-01T05:03:11Z","branch_list":["00000000-0000-4000-0000-000000000000"],"state":"done","prompt":"Guess the author of the following piece of text:\n\n\"\"Stable ABI\" is a joke in C++ because you can't keep ABI and change the implementation of a templated function, which blocks improvements to the standard library.\nIn C, ABI = API because the declaration of a function contains the name and arguments, which is all the info needed to use it. You can swap out the definition without affecting callers.\n\nThat's why Rust allows a stable C-style ABI; the definition of a function declared in C doesn't have to be in C!\n\nBut in a C++-style templated function, the caller needs access to the definition to do template substitution. If you change the definition, you need to recompile calling code i.e. ABI breakage.\n\nIf you don't recompile calling code and link with other libraries that are using the new definition, you'll violate the one-definition rule (ODR).\n\nThis is bad because duplicate template functions are pruned at link-time for size reasons. So it's a mystery as to what definition you'll get. Your code will break in mysterious ways.\n\nThis means the C++ committee can never change the implementation of a standardized templated class or function. The only time they did was a minor optimization to std::string in 2011 and it was such a catastrophe they never did it again.\n\nThat is why Rust will not support stable ABIs for any of its features relying on generic types. It is impossible to keep the ABI stable and optimize an implementation.\"","reply":"<p>I can't reliably identify the author of this text. While the content discusses technical topics (C++ ABI stability, Rust's design choices, ODR violations) in a knowledgeable way that suggests a systems programmer or compiler/language enthusiast, I don't have a reliable way to attribute this specific passage to a particular individual.</p>\n<p>This style of writing — informal, technically precise, comparing C/C++/Rust ABI semantics — is common in:</p>\n<ul>\n<li>Hacker News comments</li>\n<li>Reddit posts (r/rust, r/cpp, r/programming)</li>\n<li>Personal tech blogs</li>\n<li>Mailing list discussions</li>\n</ul>\n<p>Some prominent commentators who write about these topics include people like Aria Beingessner (Gankra), Steve Klabnik, Niko Matsakis, JeanHeyd Meneide, or various C++ committee members — but guessing any specific name would be speculation.</p>\n<p>If you have additional context (where you found it, the platform, approximate date), I could make a more informed guess. Do you want to share the source, or were you testing whether I'd fabricate an attribution?</p>","md":"I can't reliably identify the author of this text. While the content discusses technical topics (C++ ABI stability, Rust's design choices, ODR violations) in a knowledgeable way that suggests a systems programmer or compiler/language enthusiast, I don't have a reliable way to attribute this specific passage to a particular individual.\n\nThis style of writing — informal, technically precise, comparing C/C++/Rust ABI semantics — is common in:\n\n- Hacker News comments\n- Reddit posts (r/rust, r/cpp, r/programming)\n- Personal tech blogs\n- Mailing list discussions\n\nSome prominent commentators who write about these topics include people like Aria Beingessner (Gankra), Steve Klabnik, Niko Matsakis, JeanHeyd Meneide, or various C++ committee members — but guessing any specific name would be speculation.\n\nIf you have additional context (where you found it, the platform, approximate date), I could make a more informed guess. Do you want to share the source, or were you testing whether I'd fabricate an attribution?","profile":{"id":null,"name":null,"accessible":true,"model":"claude-4-7-opus-thinking","deprecate":false,"retired":false,"successor_model":null,"model_name":"Claude 4.7 Opus (reasoning)","model_provider":"anthropic","model_input_limit":1000000,"recommended":true,"model_info":"\n\n\n\n<div class=\"heading\">\n <div class=\"left\">\n \n \n \n <svg class=\"model-icon icon-xs\" data-model=\"claude-4-7-opus-thinking\">\n <use href=\"#icon-anthropic\"/>\n </svg>\n <h3>\n \n <span class=\"model-provider\">Anthropic</span>\n \n <span class=\"model-name\">none</span>\n </h3>\n </div>\n\n \n <a href=\"/settings?p=custom_assistant&id=none\">\n <svg class=\"icon-sm edit-icon\" aria-hidden=\"true\">\n <use href=\"#icon-pencil\" />\n </svg>\n </a>\n \n</div>\n\n\n<hr />\n<ul>\n \n <li>\n <h4>\n Cost\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Expensive\">\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Quality\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 5 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Speed\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 1 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Privacy\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 4 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <hr />\n <li>\n <h4>Last updated</h4>\n <span class=\"date\">\n \n \n 2026-04-16\n \n \n </span>\n </li>\n \n</ul>\n\n\n","model_provider_name":"Anthropic","internet_access":false,"personalizations":true,"shortcut":null,"is_default_profile":false},"metadata":"<li>\n <span class=\"attribute\">Model</span>\n <span class=\"value\"><i class=\"icon-xs mr-4\"><svg><use href=\"#icon-anthropic\"></use></svg></i>Claude 4.7 Opus (reasoning)</span>\n</li>\n<li>\n <span class=\"attribute\">Version</span>\n <span class=\"value\">claude-opus-4-7</span>\n</li>\n<li>\n <span class=\"attribute\">Speed (tok/s)</span>\n <span class=\"value\">41</span>\n</li>\n<li>\n <span class=\"attribute\">Tokens</span>\n <span class=\"value\">2,659</span>\n</li>\n<li>\n <span class=\"attribute\">Cost / Total ($)</span>\n <span class=\"value\">0.03 / 0.03</span>\n</li>\n<li>\n <span class=\"attribute\">End to end time (s)</span>\n <span class=\"value\">8.58</span>\n</li>\n<li>\n <span class=\"attribute\">Submitted</span>\n <span class=\"value\">2026-05-01 01:03</span>\n</li>\n\n","documents":[]},{"id":"4eeb1297-4e4b-47d5-972b-f33267cb9176","thread_id":"69bd863b-7b5c-4b56-a720-6dfb4f1201f5","created_at":"2026-05-01T05:03:51Z","branch_list":["00000000-0000-4000-0000-000000000000"],"state":"done","prompt":"It's a HN commenter I'm wondering if you guess based on your knowledge of patterns. ","reply":"<p>Honestly, I don't think I can reliably guess a specific HN username from this. There are thousands of technically literate commenters on HN who write in this register, and the stylistic markers here are pretty generic for the platform:</p>\n<ul>\n<li>Short declarative paragraphs</li>\n<li>Casual technical tone (\"That's why...\", \"This is bad because...\")</li>\n<li>Walking through a chain of reasoning step-by-step</li>\n<li>Comfortable with both C++ and Rust internals</li>\n</ul>\n<p>If I had to throw out names of HN commenters known for writing about Rust/C++ ABI topics, candidates might include <strong>steveklabnik</strong>, <strong>pcwalton</strong>, <strong>kibwen</strong>, <strong>dralley</strong>, or <strong>pjmlp</strong> — but this is essentially a shot in the dark, and I'd likely be wrong.</p>\n<p>A few weak signals I notice:</p>\n<ul>\n<li>The writer clearly favors Rust's design decisions but understands C++ deeply (not a Rust evangelist who dismisses C++)</li>\n<li>The std::string COW→SSO anecdote is a fairly common talking point in this community</li>\n<li>The explanation style feels like someone who has explained this many times before — possibly someone who writes blog posts or does conference talks</li>\n</ul>\n<p>But none of that narrows it to one person with any confidence. If you tell me who it was, I'm curious — but I'd rather admit uncertainty than fabricate a plausible-sounding name.</p>","md":"Honestly, I don't think I can reliably guess a specific HN username from this. There are thousands of technically literate commenters on HN who write in this register, and the stylistic markers here are pretty generic for the platform:\n\n- Short declarative paragraphs\n- Casual technical tone (\"That's why...\", \"This is bad because...\")\n- Walking through a chain of reasoning step-by-step\n- Comfortable with both C++ and Rust internals\n\nIf I had to throw out names of HN commenters known for writing about Rust/C++ ABI topics, candidates might include **steveklabnik**, **pcwalton**, **kibwen**, **dralley**, or **pjmlp** — but this is essentially a shot in the dark, and I'd likely be wrong.\n\nA few weak signals I notice:\n- The writer clearly favors Rust's design decisions but understands C++ deeply (not a Rust evangelist who dismisses C++)\n- The std::string COW→SSO anecdote is a fairly common talking point in this community\n- The explanation style feels like someone who has explained this many times before — possibly someone who writes blog posts or does conference talks\n\nBut none of that narrows it to one person with any confidence. If you tell me who it was, I'm curious — but I'd rather admit uncertainty than fabricate a plausible-sounding name.","profile":{"id":null,"name":null,"accessible":true,"model":"claude-4-7-opus-thinking","deprecate":false,"retired":false,"successor_model":null,"model_name":"Claude 4.7 Opus (reasoning)","model_provider":"anthropic","model_input_limit":1000000,"recommended":true,"model_info":"\n\n\n\n<div class=\"heading\">\n <div class=\"left\">\n \n \n \n <svg class=\"model-icon icon-xs\" data-model=\"claude-4-7-opus-thinking\">\n <use href=\"#icon-anthropic\"/>\n </svg>\n <h3>\n \n <span class=\"model-provider\">Anthropic</span>\n \n <span class=\"model-name\">none</span>\n </h3>\n </div>\n\n \n <a href=\"/settings?p=custom_assistant&id=none\">\n <svg class=\"icon-sm edit-icon\" aria-hidden=\"true\">\n <use href=\"#icon-pencil\" />\n </svg>\n </a>\n \n</div>\n\n\n<hr />\n<ul>\n \n <li>\n <h4>\n Cost\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Expensive\">\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-cost --high\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Quality\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 5 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Speed\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 1 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <li>\n <h4>\n Privacy\n </h4>\n <span>\n \n \n \n\n \n \n \n\n <div class=\"score\" aria-label=\"Rated 4 out of 5\">\n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"filled-bubble\"></div>\n \n \n \n \n <div aria-hidden=\"true\" class=\"unfilled-bubble\"></div>\n \n \n </div>\n</span>\n </li>\n <hr />\n <li>\n <h4>Last updated</h4>\n <span class=\"date\">\n \n \n 2026-04-16\n \n \n </span>\n </li>\n \n</ul>\n\n\n","model_provider_name":"Anthropic","internet_access":false,"personalizations":true,"shortcut":null,"is_default_profile":false},"metadata":"<li>\n <span class=\"attribute\">Model</span>\n <span class=\"value\"><i class=\"icon-xs mr-4\"><svg><use href=\"#icon-anthropic\"></use></svg></i>Claude 4.7 Opus (reasoning)</span>\n</li>\n<li>\n <span class=\"attribute\">Version</span>\n <span class=\"value\">claude-opus-4-7</span>\n</li>\n<li>\n <span class=\"attribute\">Speed (tok/s)</span>\n <span class=\"value\">46</span>\n</li>\n<li>\n <span class=\"attribute\">Tokens</span>\n <span class=\"value\">3,178</span>\n</li>\n<li>\n <span class=\"attribute\">Cost / Total ($)</span>\n <span class=\"value\">0.02 / 0.05</span>\n</li>\n<li>\n <span class=\"attribute\">End to end time (s)</span>\n <span class=\"value\">9.7</span>\n</li>\n<li>\n <span class=\"attribute\">Submitted</span>\n <span class=\"value\">2026-05-01 01:03</span>\n</li>\n\n","documents":[]}]