Grady Martin writes: A security researcher has leaked a complete repository of source code for Anthropic's flagship command-line tool. The file listing was exposed via a Node Package Manager (npm) mapping, with every target publicly accessible on a Cloudflare R2 storage bucket. There's been a number of discoveries as people continue to pore over the code. The DEV Community outlines some of the leak's most notable architectural elements and the key technical choices:
Architecture Highlights
The Tool System (~40 tools): Claude Code uses a plugin-like tool architecture. Each capability (file read, bash execution, web fetch, LSP integration) is a discrete, permission-gated tool. The base tool definition alone is 29,000 lines of TypeScript.
The Query Engine (46K lines): This is the brain of the operation. It handles all LLM API calls, streaming, caching, and orchestration. It's by far the largest single module in the codebase.
Multi-Agent Orchestration: Claude Code can spawn sub-agents (they call them "swarms") to handle complex, parallelizable tasks. Each agent runs in its own context with specific tool permissions.
IDE Bridge System: A bidirectional communication layer connects IDE extensions (VS Code, JetBrains) to the CLI via JWT-authenticated channels. This is how the "Claude in your editor" experience works.
Persistent Memory System: A file-based memory directory where Claude stores context about you, your project, and your preferences across sessions.
Key Technical Decisions Worth Noting
Bun over Node: They chose Bun as the JavaScript runtime, leveraging its dead code elimination for feature flags and its faster startup times.
React for CLI: Using Ink (React for terminals) is bold. It means their terminal UI is component-based with state management, just like a web app.
Zod v4 for validation: Schema validation is everywhere. Every tool input, every API response, every config file.
~50 slash commands: From /commit to /review-pr to memory management -- there's a command system as rich as any IDE.
Lazy-loaded modules: Heavy dependencies like OpenTelemetry and gRPC are lazy-loaded to keep startup fast.
Architecture Highlights
The Tool System (~40 tools): Claude Code uses a plugin-like tool architecture. Each capability (file read, bash execution, web fetch, LSP integration) is a discrete, permission-gated tool. The base tool definition alone is 29,000 lines of TypeScript.
The Query Engine (46K lines): This is the brain of the operation. It handles all LLM API calls, streaming, caching, and orchestration. It's by far the largest single module in the codebase.
Multi-Agent Orchestration: Claude Code can spawn sub-agents (they call them "swarms") to handle complex, parallelizable tasks. Each agent runs in its own context with specific tool permissions.
IDE Bridge System: A bidirectional communication layer connects IDE extensions (VS Code, JetBrains) to the CLI via JWT-authenticated channels. This is how the "Claude in your editor" experience works.
Persistent Memory System: A file-based memory directory where Claude stores context about you, your project, and your preferences across sessions.
Key Technical Decisions Worth Noting
Bun over Node: They chose Bun as the JavaScript runtime, leveraging its dead code elimination for feature flags and its faster startup times.
React for CLI: Using Ink (React for terminals) is bold. It means their terminal UI is component-based with state management, just like a web app.
Zod v4 for validation: Schema validation is everywhere. Every tool input, every API response, every config file.
~50 slash commands: From /commit to /review-pr to memory management -- there's a command system as rich as any IDE.
Lazy-loaded modules: Heavy dependencies like OpenTelemetry and gRPC are lazy-loaded to keep startup fast.
Read more of this story at Slashdot.
Euro-Office is a new open-source project supported by several European companies that aims to offer a "truly open, transparent and sovereign solution for collaborate document editing," using OnlyOffice as a starting point. The project is positioned around European digital independence and familiar Office-style editing, though it has already drawn pushback from OnlyOffice over alleged licensing violations. "The company behind OnlyOffice is also based in Russia, and Russia is still heavily sanctioned by most European nations due to the country's ongoing invasion of Ukraine," adds How-To Geek. From the report: Euro-Office is a new open-source project supported by Nextcloud, EuroStack, Wiki, Proton, Soverin, Abilian, and other companies based in Europe. The goal is to build an online office suite that can open and edit standard Microsoft Office documents (DOCX, PPTX, XLSX) and the OpenDocument format (ODS, ODT, ODP) used by LibreOffice and OpenOffice. The current design is remarkably close to Microsoft Office and its tabbed toolbars, so there shouldn't be much of a learning curve for anyone used to Word, Excel, or PowerPoint.
Importantly, Euro-Office is only the document editing component. It's designed to be added to cloud storage services, online wikis, project management tools, and other software. For example, you could have some Word documents in your Nextcloud file storage, and clicking them in a browser could open the Euro-Office editor. That way, Nextcloud (or Proton, or anyone else) doesn't have to build its own document editor from scratch.
Euro-Office is based on OnlyOffice, which is open-source under the AGPL license. The project explained that "Contributing is impossible or greatly discouraged" with OnlyOffice's developers, with outside code changes rarely accepted, so a hard fork was required. The company behind OnlyOffice is also based in Russia, and Russia is still heavily sanctioned by most European nations due to the country's ongoing invasion of Ukraine. The project's home page explains, "A lot of users and customers require software that is not potentially influenced or controlled by the Russian government." As for why OnlyOffice was chosen over LibreOffice, the project simply said: "We believe open source is about collaboration, and we look for opportunities to integrate and collaborate with the LibreOffice community and companies like Collabora."
UPDATE: Slashdot reader Elektroschock shares a statement from OnlyOffice CEO Lev Bannov, expressing his concerns about the Euro-Office inclusion of its software with trademarks removed: "We liked the AGPL v3 license because its 7th clause allows us to ensure that our code retains its original attributes, so that users are able to clearly identify the developers and the brand behind the program..."
Bannov continued: "The core issue here isn't just about what the AGPL license states, but about the additional provisions we, as the authors, have included. This is a critical distinction, even if some may argue otherwise. We firmly assert that the Euro-Office project is currently infringing on our copyright in a deliberate and unacceptable manner."
"As the creators of ONLYOFFICE, we want to make our position unequivocally clear: we do not grant anyone the right to remove our branding or alter our open-source code without proper attribution. This principle is non-negotiable and will never change. We demand that the Euro-Office project either restore our branding and attributions or roll back all forks of our project, refraining from using our code without proper acknowledgment of ONLYOFFICE."
Importantly, Euro-Office is only the document editing component. It's designed to be added to cloud storage services, online wikis, project management tools, and other software. For example, you could have some Word documents in your Nextcloud file storage, and clicking them in a browser could open the Euro-Office editor. That way, Nextcloud (or Proton, or anyone else) doesn't have to build its own document editor from scratch.
Euro-Office is based on OnlyOffice, which is open-source under the AGPL license. The project explained that "Contributing is impossible or greatly discouraged" with OnlyOffice's developers, with outside code changes rarely accepted, so a hard fork was required. The company behind OnlyOffice is also based in Russia, and Russia is still heavily sanctioned by most European nations due to the country's ongoing invasion of Ukraine. The project's home page explains, "A lot of users and customers require software that is not potentially influenced or controlled by the Russian government." As for why OnlyOffice was chosen over LibreOffice, the project simply said: "We believe open source is about collaboration, and we look for opportunities to integrate and collaborate with the LibreOffice community and companies like Collabora."
UPDATE: Slashdot reader Elektroschock shares a statement from OnlyOffice CEO Lev Bannov, expressing his concerns about the Euro-Office inclusion of its software with trademarks removed: "We liked the AGPL v3 license because its 7th clause allows us to ensure that our code retains its original attributes, so that users are able to clearly identify the developers and the brand behind the program..."
Bannov continued: "The core issue here isn't just about what the AGPL license states, but about the additional provisions we, as the authors, have included. This is a critical distinction, even if some may argue otherwise. We firmly assert that the Euro-Office project is currently infringing on our copyright in a deliberate and unacceptable manner."
"As the creators of ONLYOFFICE, we want to make our position unequivocally clear: we do not grant anyone the right to remove our branding or alter our open-source code without proper attribution. This principle is non-negotiable and will never change. We demand that the Euro-Office project either restore our branding and attributions or roll back all forks of our project, refraining from using our code without proper acknowledgment of ONLYOFFICE."
Read more of this story at Slashdot.
An anonymous reader quotes a report from Reuters: The Trump administration on Monday issued a long-awaited proposed rule to open up retirement plans to alternative assets, paving the way for private equity and cryptocurrencies to be added to 401(k) accounts. The measure, announced by the U.S. Department of Labor, is intended to ease longstanding barriers to incorporating these less liquid and less transparent assets into American retirement plans. It follows an executive order from President Donald Trump last summer and could clear the way for alternative asset management firms to tap a large new source of capital.
Industry groups have argued private market investments can enhance long-term returns and diversification for retirement savers, while skeptics warn higher fees, complexity and limited liquidity could limit those gains and pose risks for retail investors. Some private market funds that are already available to wealthier individual investors have shown signs of strain in recent months. Private credit funds known as business development companies have seen a wave of withdrawals. Treasury Secretary Scott Bessent said the proposed rule was "an initial step" and aimed to be "mindful of the importance of protecting retirement assets."
The guidance lays out how plan trustees, who have a legal fiduciary duty to act in the best interest of members, can incorporate these assets. They would have to "objectively, thoroughly, and analytically consider, and make determinations on factors including performance, fees, liquidity, valuation, performance benchmarks, and complexity," the DOL said. Trustees who abide by them will be granted safe harbor that protects them from lawsuits, it added. The Supreme Court agreed earlier this year to hear one such case filed in 2019 by a former Intel employee claiming trustees made "imprudent" decisions by investing in hedge funds and private equity funds.
Industry groups have argued private market investments can enhance long-term returns and diversification for retirement savers, while skeptics warn higher fees, complexity and limited liquidity could limit those gains and pose risks for retail investors. Some private market funds that are already available to wealthier individual investors have shown signs of strain in recent months. Private credit funds known as business development companies have seen a wave of withdrawals. Treasury Secretary Scott Bessent said the proposed rule was "an initial step" and aimed to be "mindful of the importance of protecting retirement assets."
The guidance lays out how plan trustees, who have a legal fiduciary duty to act in the best interest of members, can incorporate these assets. They would have to "objectively, thoroughly, and analytically consider, and make determinations on factors including performance, fees, liquidity, valuation, performance benchmarks, and complexity," the DOL said. Trustees who abide by them will be granted safe harbor that protects them from lawsuits, it added. The Supreme Court agreed earlier this year to hear one such case filed in 2019 by a former Intel employee claiming trustees made "imprudent" decisions by investing in hedge funds and private equity funds.
Read more of this story at Slashdot.
Franco Colapinto is set to become the first Argentinian to drive an F1 car on the streets of Buenos Aires, with the Alpine racer confirmed to take part in a historic road show in April.
Kimi Antonelli made it two wins from two Grands Prix at the Japanese Grand Prix – impressing our Power Rankings judges along the way. But who else reached the top 10 on our Suzuka list? Check out the latest scores and overall leaderboard below…
Mark Hughes examines the front wing, floor, and sidepod concepts that make Audi’s R26 one of the grid’s most distinctive designs.
Laurent Mekies watched his team score just four points in Japan, as Max Verstappen finished eighth and Isack Hadjar was outside the points in P12. The team have a best finish of sixth so far this season – not the return they hoped for from the first three races of the year.
Big Red declines comment as reports point to layoffs in the thousands
Oracle laid off thousands of employees on Tuesday as it ramps spending on AI infrastructure projects internally and with major technology partners.…
Oopsy-doodle: Did someone forget to check their build pipeline?
Would you like a closer look at Claude? Someone at Anthropic has some explaining to do, as the official npm package for Claude Code shipped with a map file exposing what appears to be the popular AI coding tool's entire source code.…
Om vast te stellen of hij erin voorkomt en zo ja, op welke wijze, wil Edwin de Roy van Zuydewijn inzage in het scenario van de voor eind 2026 aangekondigde serie Mabel & Margarita: Oranjebitter. RTL noemt de eis „preventieve censuur”.
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For the latest episode of Design Matters, Debbie Millman interviews Timothy Snyder about “how we misunderstand freedom, why truth and empathy are under threat, and what this political moment asks of us”. Millman is an *excellent* interviewer.
HOOFDDORP (ANP/DPA) - Stellantis, het moederbedrijf van merken als Opel, Peugeot, Jeep en Fiat, roept wereldwijd ongeveer 700.000 auto's terug vanwege een mogelijk brandgevaar, maakte de Duitse transportautoriteit KBA bekend. Het probleem zit in een onderdeel waar kortsluiting kan ontstaan als regenwater naar binnen dringt. Hierdoor kan brand in de motorruimte ontstaan.
Of en hoeveel auto's in Nederland worden teruggeroepen, is nog niet bekend. Een woordvoerder van Stellantis was dinsdagavond niet bereikbaar voor commentaar. De terugroepactie heeft betrekking op de merken Peugeot, Citroën, DS Automobiles, Alfa Romeo, Jeep, Fiat en Opel, met bouwjaren 2023 tot en met 2026. In Duitsland moeten ongeveer 80.000 auto's terug naar de garage.
Stellantis informeert de getroffen voertuigbezitters en verzoekt hen contact op te nemen met hun dealer om een afspraak te maken. De herstelwerkzaamheden duren ongeveer dertig minuten en worden kosteloos uitgevoerd.
Op de Klaverstraat in Rotterdam-Charlois heeft dinsdagavond een aanrijding plaatsgevonden tussen een meisje op een fiets en een auto. Het slachtoffer raakte hierbij gewond en is voor verdere zorg naar het ziekenhuis gebracht.
Verkiezingsborden moeten volgens de regels één week na de verkiezingen al uit het straatbeeld zijn verdwenen. Toch zijn er in Rotterdam nog heel wat borden te zien. Wat gebeurt er eigenlijk als politieke partijen hun borden niet zelf opruimen?
kimagure_camera has added a photo to the pool:
