AlmaLinux changes since training cutoff (latest: 10.1) — Btrfs root support, x86-64-v2 builds, post-quantum crypto via OpenSSL 3.5, SPICE re-enabled, CRB repo on by default. Load before working with AlmaLinux.

Angular v19-v21 features: linkedSignal, resource/httpResource, signal forms, route-level SSR render modes, incremental hydration, zoneless change detection, Vitest migration, and Angular Aria components.

Arch Linux changes since training cutoff (latest: 2025.12) — pacman 7.0 alpm user, Valkey replacing Redis, Plasma 6.4 Wayland-only, NVIDIA 590 open modules, Dovecot 2.4, linux-firmware split. Load before working with Arch Linux.

Astro changes since training cutoff (latest: 6.0) — Fonts API, live collections, CSP, route caching, ClientRouter, Zod 4/Vite 7/Shiki 4. Load before working with Astro.

Auth.js v5 changes since training cutoff — Next.js 16 proxy.ts migration, idToken behavioral change, WebAuthn/Passkeys provider setup. Load before working with Auth.js v5.

AWS SDK changes since training cutoff — S3 default checksums, S3 Vectors, Lambda Durable Functions, Bedrock AgentCore, CDK Mixins, SigV4a, SDK lifecycle. Load before working with AWS SDKs.

Axum changes since training cutoff (latest: 0.8.5) — {param} path syntax, no async_trait, OptionalFromRequestParts, Utf8Bytes WS, HTTP/2 WebSockets, NoContent. Load before working with Axum.

Better Auth changes since training cutoff (latest: 1.5) — OAuth 2.1 provider, Agent Auth protocol, cookie cache strategies, organization hooks, MCP integration, Stripe billing, i18n, SSO/SAML SLO, Electron/Expo/Convex support. Load before working with Better Auth.

Biome v2.0-2.4 changes since training cutoff — linter domains, includes replacing ignore/include, assists, GritQL plugins, type-aware linting, Vue/Svelte/Astro full support, embedded snippets. Load before writing Biome config or rules.

Bun changes since training cutoff (latest: 1.3.10) — S3 client, built-in SQL/Redis, route-based HTTP server, CSS bundler, V8 compatibility. Load before working with Bun.

Caddy changes since training cutoff (latest: 2.11.2) — ECH, wildcard certs by default, file placeholders, log sampling, request_body set, SIGUSR1 reload, post-quantum TLS. Load before working with Caddy.

CentOS Stream changes since training cutoff (latest: 10) — x86_64_v3 minimum, Wayland-only (Xorg removed), Valkey replaces Redis, modularity removed, desktop apps to Flatpak. Load before working with CentOS Stream.

Creates a symlink so .claude/memory/ in your project points to Claude Code's system memory directory — browse and edit memory files from your project tree

Clerk changes since training cutoff (latest: 1.0.0) — Core 3 SDK, <Show> component, Clerk Elements, billing APIs, machine auth, Go/Python SDKs. Load before working with Clerk.

Debian changes since training cutoff (latest: 13) — systemd run0, apt deb822 format, /tmp tmpfs default, wtmpdb/lastlog2, OpenSSH DSA removal, curl HTTP/3. Load before working with Debian.

Deno changes since training cutoff (latest: 2.7.0) — Deno.spawn(), permission sets, deno audit, lint plugin API, QUIC, OpenTelemetry. Load before working with Deno.

Dioxus changes since training cutoff (latest: 0.7.4) — Signals replacing use_state, RSX macro overhaul, server functions, asset!() system, dx CLI, Element-as-Result. Load before working with Dioxus.

Django changes since training cutoff (latest: 6.0) — composite primary keys, CSP middleware, template partials, background tasks, async paginator. Load before working with Django.

Docker changes since training cutoff (latest: 0.31.0) — Rego source policies, bake --var flag, semvercmp function, env lookup disable. Load before working with Docker.

Drizzle ORM changes since training cutoff (latest: 1.0.0-beta.19) — consolidated validator imports, Effect Schema support, node-sqlite driver, .comment() query tagging. Load before working with Drizzle.

Elixir 1.19–1.20, Phoenix 1.8, LiveView 1.0–1.1: type system inference, map key typing, colocated hooks, portals, scopes, magic link auth, new APIs and breaking changes.

FastAPI changes since training cutoff (0.112-0.135.3) -- native SSE, yield streaming, strict_content_type, dependency scopes, Pydantic v1 dropped, Starlette 1.0, Pydantic 2.12 MISSING sentinel/exclude_if, security 401 fix. Load before working with FastAPI.

Fedora Linux changes since training cutoff (latest: 44) — DNF5 replaces DNF4, /usr/sbin merged, ifcfg removed, Redis→Valkey, SHA-1 distrusted, cert.pem dropped, RPM 6.0, Podman 6, CMake 4.0, lastlog2, nftables default. Load before writing Fedora scripts, Dockerfiles, or system automation.

Flutter 3.29-3.41 + Dart 3.7-3.11 changes since training cutoff — dot shorthands, squircles, null-aware elements, predictive back, platform assets. Load before working with Flutter/Dart.

GCP changes since training cutoff — Gen AI SDK replaces Vertex AI SDK, Gemini 2.5/3.x models, Cloud Run worker pools, Artifact Registry migration, ADK. Load before working with GCP.

Gleam changes since training cutoff (latest: 1.15) — echo debugging, assert testing, bit array improvements, JavaScript FFI API, dev directory, record update enhancements. Load before working with Gleam.

Go changes since training cutoff (latest: 1.26.0) — new(expr) builtin, errors.AsType, self-referential generics, reflect iterators, go fix modernizer. Load before working with Go.

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htmx changes since training cutoff (latest: 4.0 pre-release) — explicit inheritance, hx-status, hx-partial, new swap styles, fetch-based rewrite, extension API v2. Load before working with htmx 2.0+ or 4.0.

Detects project technologies, installs matching knowledge patches, and enforces patch content over outdated training data

Kotlin ecosystem changes since training cutoff (latest: 2.3.0) — guard conditions, explicit backing fields, multi-dollar interpolation, Compose compiler plugin, Ktor 3.0, Coroutines 1.10, Serialization 1.10, Compose Multiplatform 1.10. Load before working with Kotlin.

Kubernetes features from v1.33-1.35 including In-Place Pod Resize GA, Dynamic Resource Allocation GA, MutatingAdmissionPolicy, Pod-Level Resources, Image Volumes, Gateway API v1.3-1.4, and key deprecations. Use when writing Kubernetes manifests, Helm charts, or controller code targeting recent cluster versions.

LangChain 1.0 / LangGraph 1.0 changes — create_agent replaces create_react_agent, middleware system, ToolRuntime, content_blocks, structured output strategies, simplified namespace, Deep Agents SDK, breaking changes (Python 3.10+, .text property). Load before working with LangChain.

Leptos changes since training cutoff (latest: 0.8.17) — ShowLet component, Show signal support, Bitcode server function encoding. Load before working with Leptos.

Next.js changes since training cutoff (latest: 16.1) — proxy.ts, "use cache", Cache Components, navigation hooks, typed routes, auto PageProps, React 19.2. Load before working with Next.js.

Nginx changes since training cutoff (latest: 1.29.7) — upstream keepalive defaults, sticky directive, DNS resolve, HTTP/2 proxying, TLS defaults. Load before working with Nginx.

Node.js changes since training cutoff (latest: 25.5.0) — native fetch, test runner, permission model, WebSocket client, require(ESM), URLPattern. Load before working with Node.js.

Nuxt changes since training cutoff (latest: 3.12) — routeRules middleware, server/client-only pages, Nuxt 4 compatibility mode, auto-registered layers. Load before working with Nuxt 3.11+.

pgvector changes since training cutoff (latest: 0.8.2) — halfvec, sparsevec, bit indexing, binary quantization, iterative index scans, subvector extraction, L1 distance. Load before working with pgvector.

Playwright 1.50-1.59 changes since training cutoff — Screencast API, browser.bind(), test agents, ARIA snapshot improvements, async disposables, storage state enhancements. Load before working with Playwright.

Podman changes since training cutoff (latest: 5.8.0) — Quadlet CLI management, OCI artifacts, multi-file install, BoltDB→SQLite migration, TLS remote. Load before working with Podman.

PostGIS changes since training cutoff (latest: 3.6.1) — SFCGAL CG_* rename, ST_CoverageClean, ST_AsRasterAgg, topology bigint IDs, viewport simplification, 3D SFCGAL ops. Load before working with PostGIS.

PostgreSQL changes since training cutoff (latest: 18.1) — JSON_TABLE, SQL/JSON functions, MERGE RETURNING, virtual generated columns, UUIDv7, temporal PRIMARY KEY. Load before working with PostgreSQL.

Prisma changes since training cutoff (latest: 7.3) — v7 ESM rewrite, prisma-client generator, driver adapters, prisma.config.ts, TypedSQL, SQL comments. Load before working with Prisma.

Python changes since training cutoff (latest: 3.14) — t-strings, deferred annotations, free-threaded CPython, subinterpreters, zstd compression, dead battery removals. Load before working with Python.

PyTorch 2.6–2.11 changes — weights_only=True default, FSDP2 fully_shard, torch.compile improvements (mega cache, hierarchical compilation, control flow ops), varlen_attn, FlexAttention FA4, Dim.AUTO export, TorchScript deprecated. Load before writing PyTorch code.

Rails 8.0–8.1 changes — Solid Queue/Cache/Cable (no Redis), Kamal 2 deployment, Propshaft, authentication generator, Turbo 8 morphing, params.expect, job continuations, structured events. Load before working with Rails.

React changes since training cutoff (latest: 19.2.0) — Activity component, cacheSignal, Partial Pre-rendering, prerender/resume APIs, eslint-plugin-react-hooks v6. Load before working with React.

React Router v7 changes since training cutoff — Framework mode (routes.ts, Vite plugin), type-safe route modules, middleware with context API, pre-rendering, SPA/SSR config. Load before working with React Router v7+.

RHEL changes since training cutoff (latest: 10.1) — Valkey replaces Redis, Podman v5 with pasta networking, post-quantum crypto, ISC Kea DHCP, stricter TLS/FIPS policies. Load before working with RHEL.

Rocky Linux changes since training cutoff (latest: 10.0) — DNF 5 (modularity removed), Valkey replaces Redis, rpmsort, rh_waived kernel arg. Load before working with Rocky Linux.

Rust changes since training cutoff (latest: 1.94.0) — Rust 2024 Edition, async closures, trait upcasting, new std APIs, cargo resolver v3. Load before working with Rust.

Serde/serde_json changes since training cutoff (latest: serde 1.0.228 / serde_json 1.0.149) — Map sorting, Map as Deserializer, RawValue constants, Map FromStr. Load before working with serde or serde_json.

SolidJS changes since training cutoff (latest: 2.0 beta, SolidStart 1.1) -- Solid 2.0 rewrites reactivity with microtask batching, split effects, async-first computations, Loading/Errored boundaries, draft-first stores, actions with optimistic updates, and DOM model cleanup. Load before working with SolidJS.

Spring Boot changes since training cutoff (latest: 4.0) — modular starters, Jackson 3, Spring Framework 7, Security 7, Spring AI 1.0, HTTP service clients. Load before working with Spring Boot.

SQLite changes since training cutoff (latest: 3.51) — json_pretty, unistr, jsonb_each/jsonb_tree, percentile aggregates, multi-arg iif, numeric underscores, sqlite3_setlk_timeout. Load before working with SQLite.

SQLx changes since training cutoff (latest: 0.9.0-alpha.1) — SqlSafeStr, owned Arguments, sqlx.toml config, begin_with transactions, SQLite hooks, PgBindIter. Load before working with SQLx.

Stripe changes since training cutoff (latest: 2026-03-25.dahlia) -- named API versions, stripe-node v21 Decimal type, stripe-python v15 dict removal, Billing Mode, Accounts v2, Event Destinations. Load before working with Stripe.

Supabase changes since training cutoff — OAuth 2.1 server, Web3 auth, Edge Function background tasks/S3 mounts, Realtime authorization, vector/analytics buckets, pgmq queues, MCP server, new API key model. Load before working with Supabase.

SUSE changes since training cutoff (SLES 16.0, openSUSE Leap 16.0) — Agama installer replaces YaST, SELinux enforcing, NetworkManager-only, /usr-merge defaults, Wayland-only. Load before working with SUSE or openSUSE.

Svelte changes since training cutoff (latest: 5.0.0) — runes ($state, $derived, $effect, $props), snippets replacing slots, callback props replacing events, mount/hydrate API. Load before working with Svelte.

Swift changes since training cutoff (5.10\u20136.3) \u2014 approachable concurrency, InlineArray, @c interop, module selectors, Swift Testing updates. Load before working with Swift.

Tailwind CSS changes since training cutoff (latest: 4.1) — text shadows, composable masks, overflow-wrap, safe alignment, @source directives, pointer/noscript variants. Load before working with Tailwind CSS.

Tauri 2.0-2.5 changes since training cutoff — capabilities replacing allowlist, IPC channels, plugin system v2, mobile support, config v2 structure. Load before working with Tauri.

Terraform/OpenTofu changes since training cutoff (latest: TF 1.15 / OT 1.12) — ephemeral values, write-only arguments, cross-object validation, Stacks, resource identity, OpenTofu divergences. Load before working with Terraform or OpenTofu.

Tokio changes since training cutoff (latest: 1.50.0 / tokio-util 0.7.18) — SetOnce, JoinMap, JoinQueue, cooperative scheduling, biased join. Load before working with Tokio.

Traefik changes since training cutoff (latest: 3.6.9) — multi-layer routing, Redis rate limiter, p2c/leasttime LB strategies, fast proxy, ForwardAuth body forwarding, OTLP logs, post-quantum TLS, Knative provider. Load before working with Traefik.

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TypeScript changes since training cutoff (latest: 5.9) — import defer, --module node20, ArrayBuffer breaking change, TypeScript 7 native Go port (tsgo). Load before working with TypeScript.

Ubuntu changes since training cutoff (latest: 25.10) — sudo-rs, rust-coreutils, APT 3.1, OpenSSH 10.0, OpenSSL 3.5 post-quantum crypto, Chrony NTS, Wayland-only GNOME. Load before working with Ubuntu.

Vercel AI SDK changes since training cutoff (latest: 4.1.0) — PDF files, computer use tools, continuation, image generation, stream smoothing, createDataStreamResponse, tool call repair. Load before working with Vercel AI SDK.

Vite changes since training cutoff (latest: 8.0) — Rolldown bundler, tsconfigPaths, React plugin v6 with Oxc, Environment API, SSR improvements. Load before working with Vite.

Vitest changes since training cutoff (latest: 4.1) — projects config, test tags, stable browser mode, visual regression, test.extend builder, aroundEach hooks, expect.schemaMatching, agent reporter. Load before working with Vitest.

Vue.js ecosystem changes since training cutoff — Vue 3.6 Vapor Mode, Pinia 3, Pinia Colada, Vue Router 5, Data Loaders. Load before working with Vue.js.

WorkOS changes since training cutoff (latest: Node SDK v8.10, AuthKit Next.js v3) -- AuthKit proxy/middleware, PKCE, createWorkOS factory, client components, React SPA auth. Load before working with WorkOS.

Zig changes since training cutoff (latest: 0.14.0) — labeled switch, decl literals, @branchHint, DebugAllocator, unmanaged containers, root_module build API. Load before working with Zig.

Zitadel IAM changes since training cutoff (latest: v4.13) — V2 ConnectRPC APIs, Actions V2 webhooks, Session API custom login, Login V2 Next.js, token exchange GA, new language SDKs. Load before working with Zitadel.