# Open Source > 21 posts about Open Source, summarised, each linking to the original. ## Articles ### [Compose Multiplatform 1.12.0 Released](https://yomu.fyi/post/compose-multiplatform-1-12-0-released.md) - Company: [Jetbrains](https://yomu.fyi/company/jetbrains.md) - Author: Elvira Mustafina - Published: Aug 26, 2026 JetBrains has announced the release of Compose Multiplatform 1.12.0 with targeted capabilities for artificial intelligence integrations, web rendering, and desktop application layouts. The update incorporates an experimental Model Context Protocol server inside Compose Hot Reload, allowing AI agents to trigger reloads, capture screenshots, inspect the semantic tree, and simulate user interactions directly. For web deployments, the framework now provides automatic font fallback by downloading necessary Noto font subsets on demand when unresolved characters occur during rendering. Desktop developers receive an experimental v2 window and dialog application programming interface in the androidx.compose.ui.window.v2 package, which distinguishes requested states from actual window states and permits precise control over positioning, sizing constraints, and multi-screen placement. These combined enhancements improve developer workflows and runtime flexibility across multiple target platforms. ### [How Ubuntu Is Using Rust to Rebuild Core System Tools](https://yomu.fyi/post/how-ubuntu-is-using-rust-to-rebuild-core-system-tools.md) - Company: [Jetbrains](https://yomu.fyi/company/jetbrains.md) - Author: Irina Mihajlovic - Published: Aug 26, 2026 Canonical is selectively adopting Rust to rewrite core system utilities across Ubuntu releases to improve memory safety, security, and long-term resilience. Starting in Ubuntu 26.04 LTS, uutils coreutils shipped as the default implementation targeting complete GNU compatibility, alongside sudo-rs, which introduced intentional behavior changes like asterisk display on password entry. Canonical is also funding ntpd-rs to consolidate NTP, NTS, and PTP into a single utility, while collaborating on UPKI to bring certificate revocation to system utilities. To manage Rust packaging at distribution scale, Canonical vendors dependencies per package rather than creating individual Debian packages for crates and embeds software bills of materials into binaries using cargo auditable. Future plans include exploring Rust implementations of compression libraries like bzip2-rs, zlib-rs, and zstd-rs. ### [Project Lighthouse — Part 3: Introducing project-lighthouse-anonymize](https://yomu.fyi/post/project-lighthouse-part-3-introducing-project-lighthouse-anonymize.md) - Company: [Airbnb](https://yomu.fyi/company/airbnb.md) - Author: Adam Bloomston - Published: Aug 25, 2026 Airbnb has open-sourced project-lighthouse-anonymize, a Python library powering their privacy-preserving anonymization used to measure user experience disparities. The release is accompanied by technical papers detailing Core Mondrian, an extended partition-based anonymization algorithm, alongside a framework for measuring anonymized data quality. The library enforces k-anonymity and p-sensitive k-anonymity while offering built-in data quality metrics. ### [Ideas Worth a Longer Conversation: The JetBrains Research Podcast](https://yomu.fyi/post/ideas-worth-a-longer-conversation-the-jetbrains-research-podcast.md) - Company: [Jetbrains](https://yomu.fyi/company/jetbrains.md) - Author: Katie Fraser - Published: Aug 25, 2026 The JetBrains Research Podcast investigates foundational software development and computer science questions through discussions with industry researchers. In team psychology, Cat Hicks demonstrates that collaborative culture and organizational belonging reduce developer anxiety around automated tooling while curbing the risks of overproduction pressure. Historical analysis by Tomáš Petříček shows that programming spans five competing cultures rather than pure specification implementation, explaining why automated code generation historically encounters limits. Regarding artificial intelligence evaluation, Ibragim Badertdinov details how SWE-rebench isolates model capability through dataset decontamination, leveraging the strict verifiability of software test execution for training feedback. Additionally, conversations with Alexander Kulikov and Anna Kogan examine how foundational mathematical understanding aids AI oversight and address adoption hurdles for open-source computer vision infrastructure. ### [MetaRoCE: A New RDMA Transport Built for AI-Scale Ethernet](https://yomu.fyi/post/metaroce-a-new-rdma-transport-built-for-ai-scale-ethernet.md) - Company: [Meta](https://yomu.fyi/company/meta.md) - Author: By Arvind Srinivasan, Neil Spring, Omar Baldonado, Rajiv Krishnamurthy - Published: Aug 24, 2026 Scaling frontier AI training and inference across massive GPU clusters places severe demands on network fabrics, yet conventional RoCE relies on Priority Flow Control to enforce in-order packet delivery. Meta introduced MetaRoCE, a clean-sheet RDMA transport protocol engineered specifically for lossy, multiplane commodity Ethernet without requiring PFC. By shifting intelligence to endpoint NICs, the protocol sprays packets across fine-grained logical paths, writing out-of-order data directly into destination memory without reorder buffers or head-of-line blocking. Congestion is managed via per-path ECN windows paired with receiver-driven rate hints returned in acknowledgments. In validation on a 64-node AMD GPU cluster running collective operations, MetaRoCE outperformed RoCEv2, sustaining roughly 86% throughput under 1% packet loss and achieving linear scaling across multiplane fabrics. ### [Help AI Coding Agents Write Up-To-Date Code With Modern Golang Skills](https://yomu.fyi/post/help-ai-coding-agents-write-up-to-date-code-with-modern-golang-skills.md) - Company: [Jetbrains](https://yomu.fyi/company/jetbrains.md) - Author: Artem Pronichev - Published: Aug 24, 2026 AI coding agents often generate outdated Go patterns because older syntax dominates training data and new features fall past model cutoffs. To address this gap, the GoLand team released Modern Go Guidelines, an open-source set of skills and CLI tools covering Go 1.0 through Go 1.27. The tool inspects a project's go.mod file or a specific version flag to supply only the language features and standard library additions compatible with that environment. Using a progressive disclosure approach, the CLI provides concise rule identifiers via a list command and expands into before-and-after examples through an explain command. This mechanism minimizes token consumption while helping agents produce up-to-date, compilable code without modifying project files. ### [A Tale of Two Flink Autoscalers](https://yomu.fyi/post/a-tale-of-two-flink-autoscalers.md) - Company: [Netflix](https://yomu.fyi/company/netflix.md) - Author: Netflix Technology Blog - Published: Aug 21, 2026 Netflix operates over 30,000 Apache Flink jobs across multiple AWS regions, ranging from managed pipelines to complex stateful DAGs. Its initial in-house autoscaler used external telemetry from Mantis and Atlas to scale TaskManagers as a single unit, cutting resource usage by 25–45% but failing on multi-operator stateful topologies. To address these limitations, Netflix adopted the Apache Flink Autoscaler library, which calculates True Processing Rate and per-vertex parallelism using internal metrics. The architecture uses Temporal workflows orchestrated within a Spring Boot application to evaluate jobs individually and prevent cross-job blast radiuses. Implementing the open-source autoscaler reduced annualized compute expenditures by 58% for client telemetry and logging, saving approximately $1.1 million. ### [Announcing Cloudflare Ambassadors, Community Engineers, and another $1M in open-source funding](https://yomu.fyi/post/announcing-cloudflare-ambassadors-community-engineers-and-another-1m-i.md) - Company: [Cloudflare](https://yomu.fyi/company/cloudflare.md) - Author: Kristian Freeman - Published: Aug 7, 2026 Cloudflare introduced an updated community initiative featuring two tracks: Cloudflare Ambassadors and Cloudflare Community Engineers. The Ambassador program selects community leaders for terms lasting up to two years to organize events, lead student groups, and create learning spaces with company-provided credits, resources, and marketing assets. The Community Engineer track offers grants from a new one million dollar open-source fund spanning the next two years to support maintainers of projects such as Astro, Agents SDK, EmDash, Hono, and Vinext. To maintain its Discord server of nearly 100,000 members, a new Discord committee composed of staff and Ambassadors will guide community discussions while automated spam protections handle routine moderation. ### [Building an open Agentic Internet: readable, discoverable, callable, and payable](https://yomu.fyi/post/building-an-open-agentic-internet-readable-discoverable-callable-and-p.md) - Company: [Cloudflare](https://yomu.fyi/company/cloudflare.md) - Author: Jack Galilee - Published: Aug 6, 2026 The modern web produces billions of bot requests that repeatedly fetch unchanged pages, highlighting an architecture fundamentally misaligned with automated visitors acting on behalf of paying users. Cloudflare outlines an open Agentic Internet structured around four foundational capabilities: readability, discoverability, callability, and payability. Identity and access rely on open specifications such as Web Bot Auth and Private Access Control Tokens, while Markdown for Agents and the Kitesurf browser reduce token overhead and context window bloat. For execution and monetization, WebMCP exposes structured tools directly through the browser, and protocols like x402 paired with Monetization Gateway enable per-fetch transactions. These open standards allow domain owners to define tool contracts, verify bot identities, and monetize agent traffic without relying on legacy advertising models. ### [Don’t stop early: Case-folding source code at memory speed](https://yomu.fyi/post/don-t-stop-early-case-folding-source-code-at-memory-speed.md) - Company: [Github](https://yomu.fyi/company/github.md) - Author: Alexander Neubeck - Published: Jul 31, 2026 GitHub's code search engine, Blackbird, must case-fold over 480TB of source code across 180 million repositories during indexing and query matching. To accelerate this operation on source code that is overwhelmingly ASCII, the engineering team replaced early-exit branching with an unconditional branch-free loop. The implementation tests uppercase ASCII ranges using wrapping arithmetic, modifies bits in place, and detects non-ASCII bytes with an accumulator register tested only after the loop completes. Eliminating data-dependent exits allowed LLVM to generate SIMD instructions and achieve throughput exceeding 45 GiB/s on an Apple M4 processor. The optimized implementation was released as the open-source Rust crate casefold. ### [Tame Dependabot: Group your updates, slow the cadence, keep security fast](https://yomu.fyi/post/tame-dependabot-group-your-updates-slow-the-cadence-keep-security-fast.md) - Company: [Github](https://yomu.fyi/company/github.md) - Author: Bruno Borges - Published: Jul 29, 2026 Dependabot often floods repository maintainers with individual daily pull requests for single patch bumps, wasting review and continuous integration resources. Microsoft's GCToolkit project mitigated this issue by updating its dependabot.yml configuration to group dependency updates using wildcard patterns and slowing the schedule interval to monthly. The project also expanded coverage to include Maven alongside GitHub Actions so all relevant package ecosystems receive managed updates. Because Dependabot processes security alerts independently of regular version schedules and enforces a default three-day package cooldown, critical vulnerability fixes remain fast while routine maintenance noise drops significantly. ### [Modernizing the Meta Ads Service With an Open-Source Kernel Scheduler](https://yomu.fyi/post/modernizing-the-meta-ads-service-with-an-open-source-kernel-scheduler.md) - Company: [Meta](https://yomu.fyi/company/meta.md) - Published: Jul 13, 2026 Meta's ad serving fleet encountered latency regressions and technical debt after Linux kernel upgrades introduced the default EEVDF scheduler. To resolve these performance drops across billions of daily requests, the engineering team implemented sched\_ext, an open-source, BPF-based scheduling framework integrated into Linux kernel v6.12. The custom scheduling policy uses domain knowledge to soft-partition CPUs dynamically into separate pools for latency-critical request threads and background work, enhancing L3 cache locality. Packaged as a user-space binary, the scheduler allows policy iterations and rollouts via process restarts without kernel rebuilds. The deployment achieved a 28% reduction in p99 ads retrieval latency, a 1.1% increase in ranked ads, and 3.28 megawatts in fleet-wide power savings. ### [Scaling Grab's Data Lake: Our journey to Apache Iceberg adoption](https://yomu.fyi/post/scaling-grab-s-data-lake-our-journey-to-apache-iceberg-adoption.md) - Company: [Grab](https://yomu.fyi/company/grab.md) - Author: Rahul Penti - Published: Jul 10, 2026 Grab transitioned its petabyte-scale data lake from Hive Parquet to Apache Iceberg to resolve metadata bottlenecks, small file fragmentation, and lack of native ACID support. Implementing Iceberg with Z-ordering reduced navigation query runtimes from 70 seconds to 6 seconds and cut daily S3 API costs by up to 95% on key operational datasets. To seamlessly manage concurrent table formats without forcing engineers to specify format prefixes, Grab developed and open-sourced UnifiedSparkCatalog. This custom catalog transparently detects table types via the Hive Metastore, routes queries to format-specific handlers, and retains backwards compatibility for legacy Hive operations. ### [10 Years of Meta’s Commitment to Python](https://yomu.fyi/post/10-years-of-meta-s-commitment-to-python.md) - Company: [Meta](https://yomu.fyi/company/meta.md) - Published: Jun 30, 2026 Meta has marked ten consecutive years as a sponsor of the Python Software Foundation (PSF) to ensure the language remains robust and sustainable. Python represents the most widely used programming language across Meta's infrastructure, powering applications like Instagram and Threads as well as internal AI research. Beyond financial backing, Meta engineers actively contribute core language features, author Python Enhancement Proposals (PEPs), and build open-source tools such as the Pyrefly type checker. Company sponsorship directly funds the PSF's Developer-in-Residence program, core infrastructure, and security enhancements for the Python Package Index (PyPI). Continued support of the PSF functions as a strategic investment in maintaining the stability of the broader open-source ecosystem. ### [How we used DSPy to turn AI evaluations into better responses in Dash chat](https://yomu.fyi/post/how-we-used-dspy-to-turn-ai-evaluations-into-better-responses-in-dash.md) - Company: [Dropbox](https://yomu.fyi/company/dropbox.md) - Author: Ilya Yakovlev,Andrew Cheung,Binoy Dash,Simran Jumani,Dmitriy Meyerzon - Published: Jun 25, 2026 Dropbox improved its Dash chat agent by establishing an automated optimization loop powered by DSPy and LLM-as-judge evaluations. Engineers first calibrated their LLM judges against human-annotated interaction traces, then used those judges to systematically optimize the agent's system prompts via offline counterfactual replay. This automated workflow reduced incomplete responses by 26% while decreasing overall token consumption. ### [From Custom to Open: Scalable Network Probing and HTTP/3 Readiness with Prometheus](https://yomu.fyi/post/from-custom-to-open-scalable-network-probing-and-http-3-readiness-with.md) - Company: [Slack](https://yomu.fyi/company/slack.md) - Author: Carlo Preciado - Published: Mar 31, 2026 Slack encountered a lack of client-side observability when introducing HTTP/3 at its edge. Because HTTP/3 runs over QUIC on UDP instead of TCP, neither existing commercial SaaS tools nor the internal Prometheus Blackbox Exporter could probe the new endpoints. To address this gap, an engineering intern integrated the open-source quic-go library into Prometheus Blackbox Exporter to build a native, configurable HTTP/3 probe. Slack deployed an internal implementation using the upstream functionality while waiting for pull request reviews, ultimately landing the contribution upstream. The resulting setup provides a unified view of HTTP/1.1, HTTP/2, and HTTP/3 metrics within Grafana, enabling reliable alerting and faster correlation with other telemetry. ### [Effortless enterprise authentication at Grab: Dex in action](https://yomu.fyi/post/effortless-enterprise-authentication-at-grab-dex-in-action.md) - Company: [Grab](https://yomu.fyi/company/grab.md) - Author: Kah Wei Lee - Published: May 23, 2025 Grab needed a centralised system to simplify identity management, satisfy audit requirements, and standardise authentication across internal and external tools like Databricks and Datadog. The engineering team selected OpenID Connect as their standard protocol and adopted Dex, an open-source CNCF identity aggregator. Dex acts as an intermediary between applications and multiple identity providers to issue standardised OIDC tokens. To secure service-to-service communication, Grab implemented token exchange with trusted peer relationships rather than relying on privileged service accounts. Dex also provides a kill-switch mechanism that can route authentication traffic to an alternate provider during identity provider outages. ### [From failure to success: The birth of GrabGPT, Grab’s internal ChatGPT](https://yomu.fyi/post/from-failure-to-success-the-birth-of-grabgpt-grab-s-internal-chatgpt.md) - Company: [Grab](https://yomu.fyi/company/grab.md) - Author: Wenbo Wei - Published: May 19, 2025 Grab's machine learning platform team initially faced overwhelming volumes of repetitive user inquiries across their internal support channels. An initial attempt to automate answers using the open-source chatbot-ui framework and GPT-3.5-turbo failed to scale because the 8,000-token context limit could not accommodate extensive documentation, and embedding search proved inadequate. The project then pivoted to create an internal conversational AI platform called GrabGPT by wiring chatbot-ui with Google authentication and Grab's catwalk model-serving infrastructure. The resulting internal service rapidly expanded across the organization, providing auditable interactions, multi-model support across OpenAI, Claude, and Gemini, and private network routing to safeguard corporate data. ### [Grab Experiment Decision Engine - a Unified Toolkit for Experimentation](https://yomu.fyi/post/grab-experiment-decision-engine-a-unified-toolkit-for-experimentation.md) - Company: [Grab](https://yomu.fyi/company/grab.md) - Author: Ruike Zhang - Published: Apr 9, 2024 Grab's Experimentation platform tests thousands of experimental variants weekly, but analyses were largely handled manually using disparate tools unsuited to multi-sided marketplace nuances. To standardize workflows and eliminate reliability issues, Grab developed the GrabX Decision Engine, an internally open-sourced Python toolkit integrated with its Automated Experiment Analysis application. The framework includes a Trusted Advisor component that automates power analysis and sample size estimation while adjusting for clustered standard errors across metric data types. It also bundles a post-experiment statistical toolbox executing default and custom evaluations, ranging from non-parametric tests to regression models that control for confounders and fixed effects. This unified platform institutionalizes experimentation best practices across teams, streamlining collaboration and ensuring consistent statistical inference. ### [2.3x faster using the Go plugin to replace Lua virtual machine](https://yomu.fyi/post/2-3x-faster-using-the-go-plugin-to-replace-lua-virtual-machine.md) - Company: [Grab](https://yomu.fyi/company/grab.md) - Author: Yonghao Hu - Published: May 15, 2023 Talaria, an open-source distributed time-series database developed at Grab, previously allowed users to run custom data transformation scripts during ingestion using a Lua virtual machine. Launching and executing Lua scripts caused significant performance overhead when processing large volumes of events. To resolve this bottleneck, the team replaced the Lua VM with Go plugins compiled as Linux shared libraries (.so files). Benchmarks revealed that calling Go plugins achieves performance on par with native Go functions, executing roughly 2.3 times faster and consuming 2.3 times less memory than cached Lua VMs. Both execution methods conform to a unified Handler interface to load and run custom transformations. [Older posts](https://yomu.fyi/topic/open-source/page/2.md)