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ProgrammingDEV Community ·

New local tool keymap maps where API keys sit across config files and shell history

After a recent agent-tool vendor breach, the author found it hard to say which API keys they had or where they were stored, and suspected most developers face the same problem. They built keymap, a dependency-free Python tool that scans agent, CLI and shell config files for provider keys such as Anthropic, OpenAI, GitHub and AWS. The tool flags duplicate copies of keys, overly permissive file permissions, keys in shell history, and files at risk of being committed to git. It runs read-only with no network access or telemetry, and prints only key prefixes and SHA-256 fingerprints along with a rotation checklist.

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ProgrammingHacker News ·

Alter, a Y Combinator startup, launches access control for multi-user AI agents

Alter, a startup from Y Combinator's S25 batch, has launched a product that controls what AI agents can do when acting for multiple users. The founders note that agents often connect to systems like CRMs or billing tools through a single shared API key, which lets them perform any action that key allows, regardless of who the user is. Alter operates as a proxy that manages downstream credentials, factors in the identity of the end user for each action, and enforces fine-grained runtime policies. It also produces compliance-grade audit logs. The founders say the product is aimed at developers building agents in regulated industries and reports early users including startups and a defense contractor.

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ProgrammingDEV Community ·

How RAG Lets AI Answer Questions From Large Document Sets Without Retraining

The article explains Retrieval-Augmented Generation, a method that lets AI answer questions from long documents without being retrained. Using an HR example, it describes a company wanting to know its vacation carry-over rules buried in a 600-page handbook. RAG works by first retrieving relevant passages and then having the language model answer based on that evidence. The system is split into an indexing pipeline that ingests, chunks, and embeds documents, and an answering pipeline that retrieves, checks authorization, and generates cited responses. The author stresses that retrieval must be reliable, since similarity alone does not guarantee a correct passage.

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ProgrammingDEV Community ·

SF Compute Builds Exchange for Physical Delivery of GPU Compute Capacity

SF Compute, founded by Evan Conrad, operates a marketplace where buyers and sellers trade future GPU compute time, functioning somewhat like a commodities exchange. The company's central challenge is ensuring that compute bought actually matches the specified hardware, network, and performance requirements, since GPU capacity is not a standardized product. Conrad explained that the firm deliberately stays neutral by not owning large amounts of compute, arguing that hyperscalers and GPU makers cannot run such a market without undermining trust. The interview also describes a price curve with discounts for near-term capacity and identifies large arbitrage gaps between purchase costs and inference revenue. Conrad argued that physical delivery must be established before cash-settled derivatives are introduced, to avoid manipulation and basis risk.

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ProgrammingDEV Community ·

How to Pass the AWS SAA-C03 Solutions Architect Exam: A Practical Study Guide

The AWS Certified Solutions Architect – Associate exam is widely used in the cloud industry as a baseline credential, with certified professionals reportedly earning between $90K and $170K in the US. The author notes that more than half of first-time candidates fail, often because they study ineffectively rather than because the material is too difficult. The exam is framed as a judgment test built around scenario questions with several plausible answers, split across four domains with security weighted at 30 percent. The article outlines a six-week study plan covering core services, recurring architecture patterns such as decoupling, caching, disaster recovery, and database selection, followed by timed full-length practice exams. It also recommends practice tests that mirror the exam's scenario style, as well as aiming for consistent scores above 80 percent before booking.

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ProgrammingDEV Community ·

Overlapping AI Subscriptions Quietly Drain Household Budgets, Study-Style Analysis Finds

A DEV Community article argues that many people pay for several AI tools whose functions largely overlap, without realizing the total cost. It cites figures suggesting people underestimate monthly subscription spending by more than 2.5 times, with the average adult now billed for over eight subscriptions. The piece outlines sample AI stacks, such as ChatGPT Plus, Claude Pro, and Perplexity Pro, that can total roughly $720 a year or more. It attributes the waste to overlapping features, auto-converting free trials, and reluctance to cancel for fear of needing a tool later. The author recommends listing all charges, applying a resubscribe test, and keeping one general assistant plus one specialist.

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ProgrammingDEV Community ·

Adding Longhorn Persistent Storage to a 3-Node Talos Homelab

A builder of a 3-node Talos homelab found that its default ephemeral storage cannot support stateful apps like Grafana or PostgreSQL, since data is lost when pods or nodes fail. To fix this, they integrated Longhorn, a Kubernetes-native storage system built for redundancy and availability. Longhorn replicates each volume across two nodes, rebuilds lost replicas automatically after a failure, and takes hourly local snapshots. It can also send compressed, encrypted snapshot backups to S3-compatible storage for protection against localized failures. The Longhorn UI runs on the local network and is reached remotely through Tailscale.

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ProgrammingDEV Community ·

Biohub's Alex Rives on virtual cells, measurement tools, and a $1.8B data push

Alex Rives, chief science officer at Biohub, discusses using AI and data science to understand and eventually treat disease, with the institute's stated aim of curing or preventing all diseases. He argues that the main bottleneck for virtual cell models is not model architecture but the lack of high-quality observational data that captures causal relationships inside cells. Biohub has announced an $1.8 billion Virtual Biology initiative with partners including the US Department of Energy, the NIH, Google DeepMind, Isomorphic Labs and Meta, focused on generating large-scale spatial biology data. Rives also highlights new imaging methods such as laser phase plates, which can reveal molecular interactions in near-native cellular conditions. He envisions a near-term information-theoretic model of the cell and a longer-term world model of biology.

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ProgrammingDEV Community ·

Cached index.html causing 404 errors after fresh app deployments

A DEV Community article describes a common deployment problem where users still see a 404 error after a new app version is released. The stale cached copy of index.html is the root cause, since it references asset files that no longer exist on the server. The author explains that browsers and CDNs can keep serving the old HTML even after the build has changed. The piece outlines the general mechanism behind the issue and why it tends to appear right after a deploy. The source text provided is incomplete, so specific fixes and details from the full article are not covered here.

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ProgrammingDEV Community ·

Quiet customers may be the ones most at risk of leaving

An article on DEV Community argues that customers who never complain are not necessarily satisfied and may be quietly considering leaving. Complaints signal that a customer still expects a business to perform, whereas silence can mask a decision already made. The author notes that a yearly survey misses these early warnings, which show up in behavior such as shrinking order sizes, slower replies, and fewer interactions. Because retaining an existing customer costs far less than winning a new one, the piece recommends a weekly review of accounts that have gone quiet. It suggests a short, personal, specific message to each of them, and says businesses should be able to show when they last had a real conversation with each key account.

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ProgrammingDEV Community ·

Study finds practice-session candidates accept 93% of AI-proposed code in coding interviews

A study of 438 people practicing AI-assisted coding interviews on the nyrion.ai platform found that participants accepted 93% of the code the assistant proposed. Ten companies, including Canva, Shopify, Meta, Amazon and Google, have added an AI assistant to their coding interview rounds since June 2025. Candidates who received an AI proposal before first submit passed the stage's test suite 87% of the time, compared with 53% without one, though the author notes this is a correlation. When asked to explain their submitted code, only 9% of written answers were complete, while 79% were partial and 12% were off. The author stresses these are practice sessions, not real interviews, and that the figures reflect practice behavior rather than every company's format.

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ProgrammingDEV Community ·

Enabling Supabase RLS alone doesn't keep data private; seven other surfaces can leak it

A developer explains that turning on Row Level Security in Supabase does not by itself make data private, since policies, views, grants, and related objects also determine access. The article warns that a common mistake is shipping a broad "temporary" policy, such as one using a true condition, which leaves tables readable by anyone holding the public anon key. It also notes that policies lacking WITH CHECK clauses can let users write rows into other tenants' data. Views running with owner privileges can bypass base-table RLS unless configured with security_invoker, and loose grants to anon or authenticated roles can expose sensitive tables. The author provides read-only catalog queries to audit these surfaces, beginning with the pg_policies view.

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ProgrammingDEV Community ·

Easy CMS: an open-source headless CMS that runs inside Nuxt and Next.js apps

A developer has released Easy CMS, an MIT-licensed headless content management system that installs directly into a Nuxt or Next.js application via npm. Unlike Git-based tools such as Nuxt Content, it stores content in a database and supports records, roles, and user-created data. The author built it because existing options like Payload require a separate Next.js host, while Directus, Strapi, Sanity, and Contentful add extra servers or rely on cloud hosting. Content is defined in a typed configuration file, and the tool provides an admin panel at /admin, a typed Local API, and a REST endpoint. The core is framework-free, so it can also run as a standalone server for any frontend.

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ProgrammingDEV Community ·

Giving an AI agent browser control unlocked tasks that previously had no API

The author initially kept an AI agent limited to the terminal, avoiding browser automation due to expected flakiness. A weekly report locked behind a login with no export option forced a change. Key challenges included detecting when pages were fully loaded using specific element waits rather than fixed delays, distinguishing real failures from slow loading, and clicking by accessibility role and name instead of unstable coordinates. The agent was also designed to stop and ask for human input at security prompts like two-factor authentication. The author found the real gain was enabling tasks previously thought to require manual work, such as reading dashboards and checking supplier portals, while still remaining cautious about partially working automation.

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ProgrammingHacker News ·

Hacker News Thread Declares 'SaaS Is Dead' Amid Debate Over Software Business Models

A post titled 'SaaS Is Dead' appeared on Hacker News, linking to an external site at saasisdead.si. The submission has drawn 4 points and a single comment so far. The provided material includes only the headline, link, and engagement figures, without the full text of the linked article. As a result, the specific arguments made about the future of software-as-a-service cannot be verified from this source alone.

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ProgrammingHacker News ·

Alibaba raises DeepSeek V4 Flash 0731 output prices by 230%

Alibaba has reportedly increased the output pricing for the DeepSeek V4 Flash 0731 model by 230%. The change was highlighted in a newsletter from Stork.ai, which described the move as a quiet tripling of DeepSeek prices. The item gained traction on Hacker News, where it drew 14 points and 10 comments. The source material provides only the headline and a link, so details about the timing and the reasons behind the increase are not confirmed here.

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ProgrammingDEV Community ·

Developer details design of a Python-built Windows encryption suite, with a bounty for breaking it

The author describes ATLOCK v5, a Windows security tool written as a single Python file, and focuses on failure cases such as wrong passwords, tampered headers, rolled-back state files, and corrupted data. The file container uses chunked AES-256-GCM with independent per-chunk authentication, per-seal subkeys, and header-bound authenticated data. A key commitment check rejects wrong keys before any plaintext is produced, and KDF parameters are clamped to limits to resist resource-exhaustion from doctored files. Sensitive state is stored through an encrypted store protected by DPAPI, with a rollback anchor and an optional TPM-backed mode. The post closes with a challenge offering a reward to anyone who can break the container.

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ProgrammingHacker News ·

Pillowfort, the social networking platform, announces it is shutting down

Pillowfort, a social networking site, has announced that it is closing. The notice was published on the platform's own website and drew attention on Hacker News, where it received 4 points and 2 comments. The source material provides no further details about the reasons for the closure or the exact shutdown date. Readers interested in the full announcement can refer to the linked post on pillowfort.social.

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ProgrammingHacker News ·

Battlezone Online: BZFlag Tank Game Now Runs in the Browser

A GitHub project called bzo has brought BZFlag, the open-source tank combat game, into web browsers. The repository was shared on Hacker News, where it gained a few points but no comments at the time of posting. The source article text is limited to the project link and discussion metadata, so the specific technical approach and features are not described. Interested readers can review the code and documentation directly on GitHub.

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ProgrammingDEV Community ·

Mistral Large 4 Trails DeepSeek V4.1 Flash in Coding Benchmarks, Though Some Losses Were Test Errors

An independent evaluation tested Mistral Large 4, released as a Public Preview in October, against DeepSeek V4.1 Flash on two agentic coding benchmarks. Mistral Large 4 scored 0.5462 on the Gauntlet, placing 28th of 44, while DeepSeek V4.1 Flash scored 0.6957 there and finished faster and cheaper. On the Forge 2.0 task, Mistral's two builds scored 0.1086 and 0.3304, compared with 0.2422 and 0.6618 for DeepSeek. The author attributes part of the Gauntlet shortfall to a bug in the author's own scorer and notes that some Forge losses came from the model's own throttling behavior. The results reflect a single run per benchmark in one specific setup, and the vendor has warned the preview model may change without notice.

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