标签：#product

Chat with Notion Agents anytime Discussion | Link

Secure on-device extraction even if you're offline Discussion | Link

The IDE for controlling AI coding agents with built in loops Discussion | Link

The competitive intelligence agent Discussion | Link

Request logging: vì sao mỗi log line phải có request id, và structured log cứu debug thế nào khi có sự cố production Request logging không phải là in console.log('got a request') cho vui. Nó là dấu vết duy nhất còn lại khi một request đã đi qua service, đi qua vài downstream, gặp lỗi, và bị đóng socket. Nếu log không có gì để nối lại các dòng thuộc cùng một request — không có requestId , không có traceId — thì log của một service RPS trung bình biến thành một mớ text xen kẽ giữa hàng chục request đồng thời, và câu hỏi "request X đã đi tới đâu, fail ở service nào" trở thành không trả lời được. Structured log (mỗi dòng là một JSON object với field cố định) + một correlation id truyền qua toàn bộ pipeline chính là cái làm log có thể query được, thay vì grep mù. Hai framework Express và Fastify tiếp cận khác nhau: Fastify tích hợp pino sẵn và tự sinh req.id , Express phải tự dán qua pino-http hoặc middleware tay. Nhưng cả hai đều vỡ theo cùng một kiểu khi correlation id bị đứt giữa các service. Cơ chế hoạt động Ba miếng ghép: (1) một structured logger — thường là pino trong ecosystem Node vì nó ghi NDJSON và có async destination, (2) một cơ chế sinh/nhận requestId , (3) một cách propagate id đó qua async work và qua HTTP call sang service khác. pino là JSON logger tối giản: mỗi lời gọi logger.info({...}, 'message') xuất một dòng NDJSON ra một WritableStream (mặc định là stdout). Log level là số ( trace=10, debug=20, info=30, warn=40, error=50, fatal=60 , theo pino docs), và có child logger — logger.child({ reqId }) tạo một logger mới bind sẵn các field, mọi log line từ child đều có reqId mà không phải truyền tay. Với Fastify , chỉ cần logger: true là có pino và request logging tự động — Fastify sinh request.id (mặc định là monotonic counter, đổi được qua option genReqId ) và log một cặp dòng "incoming request" / "request completed" cho mỗi request. Trong handler, request.log là child logger đã bind reqId : import Fastify from ' fastify ' import crypto from ' node:crypto

Auto-organize files on your Mac now with MCP & CLI support Discussion | Link

Claude Cowork now keeps working on tasks even after you close your laptop. It’s part of a larger push toward smartphone-controlled agents.

Production lock analysis: vì sao pg_stat_activity một mình không đủ, và join với pg_locks mới ra root cause Lock contention trong Postgres hiếm khi báo bằng error — nó báo bằng wait_event_type = 'Lock' ở pg_stat_activity và bằng latency tăng từ phía application. Khi một incident xảy ra ("API treo, không ai biết tại sao"), thứ team cần trong 60 giây đầu là một bức tranh: PID nào đang đợi, đợi lock loại gì trên object nào, bị block bởi PID nào, PID block đó đang chạy query gì và đã giữ transaction bao lâu . pg_stat_activity một mình chỉ trả lời được nửa câu hỏi ("ai đang đợi"); pg_locks một mình chỉ trả lời nửa còn lại ("ai giữ gì"). Phải join hai view này — và bám theo pg_blocking_pids() — để dựng được blocking tree. Không có dashboard cho luồng dữ liệu này là lý do điển hình một production freeze kéo dài 30 phút thay vì 3 phút: incident commander phải mò ad-hoc bằng psql , gõ sai query, miss idle in transaction đang giữ AccessExclusiveLock của một migration nửa đời trước. Cơ chế hoạt động pg_locks là một view phơi nội dung trực tiếp của shared lock manager trong shared memory. Mỗi dòng là một lock request (đã granted hoặc đang chờ) thuộc một backend. Theo Postgres docs phần "System Views → pg_locks", các column then chốt: locktype ( relation , transactionid , tuple , virtualxid , advisory ...), relation (OID — join pg_class ), transactionid , virtualtransaction , pid (backend PID), mode ( AccessShareLock , RowExclusiveLock , ShareUpdateExclusiveLock , AccessExclusiveLock ...), granted (bool), fastpath (lock đi qua fast-path tránh shared lock manager), và waitstart (timestamp bắt đầu chờ — bổ sung sau v14, hữu ích để đo lock wait time mà không cần snapshot diff). pg_stat_activity là view phơi trạng thái runtime của mỗi backend: pid , usename , datname , application_name , client_addr , backend_start , xact_start , query_start , state ( active , idle , idle in transaction , idle in transaction (aborted) ), wait_event_type , wait_event , backend_xid , backend_xmin , qu

Ship AI agents on Google Cloud, driven by your coding agent Discussion | Link

Scale your creativity on editable canvas with agent memory Discussion | Link

The self-learning knowledge base that improves itself Discussion | Link

Nephew saw a YouTube ad. Someone was selling a "secret prompt" for ₹199, claiming ChatGPT and Claude can analyze the stock market and place trades with 90% accuracy — no technical analysis, no fundamentals, just paste this prompt. He brings it straight to Uncle. The Ad 👦 Nephew: Uncle, I saw an ad on YouTube. Some guy was saying, "Use ChatGPT and Claude AI for stock market analysis, take trades with 90% accuracy. You don't even need to know technical analysis or fundamentals — just use this prompt and you'll get all the results." Is that actually possible? 👨‍🦳 Uncle: (laughs) Ah, here we go. This is exactly how a lot of scams happen — and honestly, it's rarely because of some clever new invention. It's because of a lack of understanding, and people treating these models as a magic black box. 👦 Nephew: So are they scamming us? Or genuinely fooling themselves too? 👨‍🦳 Uncle: Not exactly a straightforward scam, and not exactly genuine either. Here's the honest split: they're maybe 30% correct, and 70% wrong. 👦 Nephew: What does that even mean? 👨‍🦳 Uncle: I'll accept this much — there genuinely are AI models out there that can do a solid job predicting stock trends or running fundamental analysis, because that kind of prediction is heavily mathematical, numerical work. But — and this is the important part — ChatGPT, Claude, and Gemini are not that kind of model. 👦 Nephew: Why not? It can literally write code. It can do math inside code. Why can't it just... do math for stock prediction too? I genuinely don't get it. 👨‍🦳 Uncle: Come, sit. This needs a proper, from-scratch conversation. We're going to dig all the way down to what these models actually are , and by the end, you'll understand exactly why ChatGPT, Claude, and Gemini are the wrong tool for this specific job — not a scam exactly, but sold by people who never actually opened the box themselves. Part 1: What Is an LLM, Really — In One Honest Sentence 👨‍🦳 Uncle: Before anything else, one sentence, and hold onto i

Modern software development thrives on rapid iteration. Organizations deploy new features, bug fixes, and infrastructure updates multiple times each day to remain competitive and respond quickly to customer needs. Continuous Integration and Continuous Delivery (CI/CD) have transformed software delivery by automating repetitive tasks and accelerating release cycles. However, speed without security creates significant risk. A fast deployment pipeline that introduces vulnerable code into production can expose organizations to data breaches, service disruptions, and compliance violations. Conversely, excessive manual security reviews can slow innovation and delay valuable releases. The solution lies in integrating security directly into the CI/CD pipeline rather than treating it as a separate checkpoint. This philosophy, commonly known as DevSecOps, enables organizations to deliver software rapidly while maintaining a strong security posture. Understanding CI/CD Pipelines What Is Continuous Integration? Continuous Integration (CI) is the practice of frequently merging code changes into a shared repository. Every commit automatically triggers builds and tests, allowing development teams to identify integration issues early instead of waiting until the end of a project. Frequent integration encourages collaboration, reduces merge conflicts, and improves overall software quality. What Is Continuous Delivery? Continuous Delivery extends Continuous Integration by ensuring that validated code is always in a deployable state. Automated testing, packaging, and release preparation make it possible to deploy new versions with minimal manual effort whenever the business is ready. What Is Continuous Deployment? Continuous Deployment goes one step further by automatically releasing approved changes to production once they pass all quality and security checks. This approach significantly shortens release cycles while requiring a high level of confidence in pipeline automation. Benefi

I hesitated to write this. Not because I don’t have an opinion about AI in software engineering, but...

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The brand’s UR9 competes with similar offerings from higher-end brands like Samsung and LG.

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Like most developers, I have a handful of small utilities I reach for every day — formatting JSON, decoding a JWT, generating a UUID, testing a regex. For years I just googled "json formatter" and pasted my data into whatever site came up first. Then one day I caught myself pasting a production JWT into a random online parser that POSTs everything to its server. That felt bad. So I built my own toolbox that never sends data anywhere. It's called WeTool — free, no login, and every tool runs 100% in your browser . You can open DevTools → Network and confirm there are zero requests while you use it. Here are the 15 I use most: Everyday JSON formatter / validator URL encode / decode Base64 encode / decode Timestamp ↔ date converter Security & encoding Hash calculator (MD5 / SHA) JWT parser UUID generator QR code generator Text & format Regex tester Text diff Markdown preview SQL formatter Debugging Cron expression parser Color converter User-agent parser Two things that matter to me and might to you: Nothing is uploaded. No backend, no login, no tracking of what you type. Local-only. 15 languages. Most tool boxes are English-only; this one isn't. It's free and I'm actively adding tools — if something you use daily is missing, tell me in the comments and I'll add it. 👉 wetool.site

We build an internal helpdesk, and I want to talk through a problem we only partly solved — because I suspect a lot of you have hit it too, and I'd genuinely like to hear how you handled it. The most requested thing from our users was never "better ticket forms." It was "please make the duplicates stop." Here's the shape of it. A deploy goes slightly wrong at a 40-person company. Within ten minutes you have: a handful of chat messages : "login is broken", "can't get into dashboard???", "deploy looks weird" several error-tracker events (whatever you run — Sentry, Rollbar, an APM): TokenExpiredError ×2, a 401 spike on /api/auth , a 5xx spike on auth-svc a couple of emails to IT : "access token expired", "need login reset" Nine items across three channels. One root cause: token rotation broke in that deploy. Whoever's on rotation spends the morning proving that, instead of fixing anything. We wanted to automate the recognition step — "these are the same thing" — not the fixing step. This is the honest version: what we tried, the small thing we actually shipped, and the parts we haven't cracked. If you've built something similar, I'd love to be told what we got wrong. Attempt 1: rules and keywords (broke immediately) The obvious first cut: normalize ticket text, match on keywords and categories, merge on high overlap. It fails on the example above, and it fails structurally: "login is broken" and TokenExpiredError share zero tokens. The human on rotation isn't string-matching — they know a deploy just happened, they know what auth-svc does, they've seen this failure shape before. Rules encode none of that. Rule systems also rot. Every incident teaches you a new synonym for "it's down," and six months in you own a regex museum nobody wants to touch. Maybe you've kept one of these healthy long-term — if so I'd honestly like to know how. Attempt 2: embed everything, cluster by similarity (the one we didn't ship) The tempting next move: embed ticket text, cluster on cosine

In 2008, Richard Thaler and Cass Sunstein needed an example simple enough to explain the whole of economic theory from a single application. They used a cafeteria menu. By moving the fruit to eye level and sending the fries to the periphery, they demonstrated that a slightly adjusted environment could convince thousands of students to make healthier choices. No one is stopped from choosing fries and the fries-loving student still chooses fries. But the undecided student chooses the apple, simply because it is now right in front of him. In 2017, Thaler was awarded the Nobel Prize in Economics for his body of work, including the development of “The Nudge Theory” with Sunstein. In the years that followed, product teams building mobile applications have taken to referring to any call-to-action on-screen as a nudge. The design of an effective nudge There are two requirements for a nudge to work reliably. The user should have an apparent desire for the thing they are being nudged toward, and the nudge should appear at the moment when this desire is at its peak. The first requirement ensures the user has a mental model of the target action, meaning they understand roughly what they are supposed to do. The second requirement serves to remove any extraneous context, ensuring the nudge does not fail due to poor timing. A checkout confirmation modal shown straight after launching the application will fail miserably as a nudge. The desire to checkout is non-existent at the launch moment, and the context of the action has little to do with the action itself. A tooltip shown after a specific number of unsuccessful attempts to checkout after viewing the cart, however, is a nudge. It has the desired behavior and the right timing. Why the difference shows up in the numbers In the example with Duolingo, the product team has effectively used the framing of an existing streak as a reference point for the next level of engagement. The players who saw streak-based progress notifications