Total 44,022 skills, Backend Development has 3824 skills
Showing 12 of 3824 skills
Use when the agent needs to read basket state, user positions, settlement status, config, or basket count from the on-chain contracts. All queries are free (no gas, no account needed). Do not use for state-changing operations.
Write and refactor TypeScript code in repos that use Effect-TS services, Zod schemas, event-sourced persistence, and namespace-driven architecture. Use this skill when implementing features, fixing bugs, writing tests, or refactoring in opencode or any TypeScript codebase built on the same stack (Effect DI, Drizzle ORM, Hono routes, Bun runtime). Triggers on tasks involving Effect services, namespace modules, Zod schema definitions, SyncEvent patterns, tool implementations, test writing, or code review in Effect-based TypeScript projects.
Provide instructions on how to build with Arc, Circle's blockchain where USDC is the native gas token. Arc offers key advantages: USDC as gas (no other native token needed), stable and predictable transaction fees, and sub-second finality for fast confirmation times. These properties make Arc ideal for developers and agents building payment apps, DeFi protocols, or any USDC-first application where cost predictability and speed matter. Use skill when Arc or Arc Testnet is mentioned, working with any smart contracts related to Arc, configuring Arc in blockchain projects, bridging USDC to Arc via CCTP, or building USDC-first applications. Triggers: Arc, Arc Testnet, USDC gas, deploy to Arc, Arc chain, stable fees, fast finality.
Guide REST API integration including HTTP methods, authentication, error handling, and rate limiting. Use this skill when the user needs to connect to a third-party API, design an API client, troubleshoot API errors, or understand API concepts — even if they say 'connect to this API', 'why is the API returning errors', 'how do I authenticate', or 'build an API integration'.
Explain blockchain fundamentals including distributed ledger architecture, consensus mechanisms, and block structure. Use this skill when the user needs to understand blockchain concepts, evaluate whether blockchain fits a use case, or design a blockchain-based solution — even if they say 'how does blockchain work', 'do I need blockchain', or 'distributed ledger'.
Hardware performance counter skill for low-level CPU analysis. Use when collecting PMU events with perf stat, using the PAPI library, measuring cache miss rates and branch misprediction ratios, computing IPC, or correlating PMU events to source lines. Activates on queries about hardware counters, PMU events, perf stat -e, PAPI, cache miss rate, branch misprediction, IPC measurement, or CPU performance events.
Rust eBPF skill using the Aya framework. Use when writing eBPF programs in Rust with aya-bpf and aya-log, defining BPF map types, integrating with tokio userspace, sharing maps between kernel and userspace, or debugging Aya compilation and loading errors. Activates on queries about Aya, aya-bpf, Rust eBPF, aya-log, eBPF in Rust, or BPF programs with tokio.
Zephyr RTOS skill for embedded development. Use when building Zephyr applications with west, configuring boards and targets, working with Kconfig and devicetree, using the Zephyr shell and logging subsystem, or running on the native_sim target. Activates on queries about Zephyr, west build, Kconfig, devicetree, Zephyr logging, west flash, board targets, or native POSIX simulation.
Zig comptime skill for compile-time evaluation and metaprogramming. Use when using comptime parameters, comptime types, generics via anytype, comptime reflection with @typeInfo, or metaprogramming patterns that replace C++ templates. Activates on queries about Zig comptime, compile-time evaluation, Zig generics, anytype, @typeInfo, comptime types, or Zig metaprogramming.
Embedded Rust skill for bare-metal microcontroller development. Use when using probe-rs or cargo-embed for flashing and debugging, setting up defmt logging, using the RTIC framework, configuring cortex-m-rt startup, writing no_std + no_main firmware, or choosing between panic-halt and panic-semihosting. Activates on queries about embedded Rust, probe-rs, cargo-embed, defmt, RTIC, cortex-m-rt, no_std embedded, or panic handling in embedded Rust.
Rust no_std skill for embedded and bare-metal development. Use when writing
Linker script skill for embedded bare-metal targets. Use when writing or modifying GNU ld linker scripts, placing code and data in specific flash or RAM regions, understanding VMA vs LMA, configuring startup .bss/.data initialization, using MEMORY and SECTIONS commands, or debugging linker errors about regions. Activates on queries about linker scripts, MEMORY command, SECTIONS command, .bss init, VMA vs LMA, weak symbols, or placing functions in specific memory regions.