AI & agents

• herdr-agentic — Agentic patterns with Herdr Orchestrator-worker, reviewer loops, parallel worktrees, and blocked-state handling for driving agents.
• herdr-cheatsheet — Herdr Persistent terminal workspaces, panes, agent states, remote sessions, automation, and plugins.
• hermes-agent — Hermes Agent Terminal-first coding agent: CLI, keybindings, slash commands, sessions, providers, and configuration.
• llm-ai — LLM & AI Tokens, embeddings, attention, transformers, RAG, prompting, agents, and evals.
• omp — omp harness The coding agent with the IDE wired in: 32 tools, subagents, LSP/DAP, hashline edits, and 40+ providers.

Languages

• c — C C17 pointers, ownership, strings, structs, UB hotspots, sanitizers, and C23 deltas.
• cpp — C++ C++20 RAII, smart pointers, STL picks, concepts, views lifetimes, UB, and sanitizers.
• golang — Go Modules, structs, interfaces, goroutines, channels, and errors.
• lua — Lua Tables, metatables, patterns, modules, and embedding.
• python — Python Comprehensions, decorators, dataclasses, and the standard library.
• rust — Rust Ownership, cargo, match, Result, traits, and concurrency.
• typescript — TypeScript Types, interfaces, generics, narrowing, and utility types.
• zig — Zig Comptime, memory/allocators, optionals/errors, build.zig, and C interop.

CLI & shell

• bash — Bash Variables, quoting, loops, conditionals, functions, and expansion.
• jq — jq The command-line JSON processor: filters, operators, recipes, and curl pipelines that actually work.
• linux-cli — Linux CLI essentials sed, awk, grep, find, xargs, sort, tar, git, and networking.

Cloud, DevOps & observability

• gcloud — gcloud Compute Engine, Cloud Storage, GKE, IAM, Cloud SQL, and logging.
• grafana — Grafana Panels, variables, transforms, alerts, and provisioning as code.
• devops — Infrastructure & DevOps CI/CD, Docker & containers, orchestration, IaC, observability, and deployment strategies.
• kubectl — kubectl Inspect, run, edit, debug, and switch Kubernetes contexts from the shell.
• promql — PromQL Selectors, rates, aggregation, and functions for Prometheus.

Data & databases

• db-optimization — Database optimization Indexes, query plans, normalization, Redis caching, and tuning.
• excel — Excel & spreadsheets Formulas, functions, pivot tables, lookups, and shortcuts.
• kafka — Kafka Topics, partitions, producers, consumers, offsets, and operations.
• postgres — Postgres management psql, users/permissions, backups, replication, tuning, and monitoring.

Embedded & hardware

• electrical — Electrical concepts Ohm's law, logic levels, pull-ups, voltage dividers, and power for firmware devs.
• embedded — Embedded dev Bare-metal and RTOS: registers, interrupts, timers, FreeRTOS, RP2040/Pico, and debugging.
• esp32 — ESP32 GPIO, UART/I2C/SPI, Wi-Fi, storage, power, and OTA on the ESP32.
• esphome — ESPHome YAML-defined firmware, sensors, and home automation for ESP devices.
• hamradio — Radio amateur Bands by ITU region, propagation, antennas, SWR/Γ, feedline, modes, safety, and RF kill-list.
• sdr — SDR Software-defined radio: IQ, sampling, DSP, GNU Radio, and common signals.

Electronics

• hardware — DIY hardware list Modules, ICs, microcontrollers, and sensors — typical and unusual — for DIY builds.
• electronics — Electronics Components, circuits, op-amps, power supplies, and practical electronics.
• kicad — KiCad Schematic, layout, footprints, design rules, and fabrication output.
• tubes — Transistors & tubes BJTs, MOSFETs, JFETs, and vacuum tubes: operation, biasing, and circuits.

Drones & FPV

• ardupilot — ArduPilot Copter 4.6: modes, failsafes, params, EKF, tune order, maiden ladder, and AI-slop kill-list.
• betaflight — Betaflight Rates, PIDs, filters, modes, and CLI for FPV drones.
• fpv — FPV engineer Frames, motors, ESCs, VTX, radios, batteries, and build workflow.
• pid-tuning — PID tuning P/I/D terms, tuning methods, symptoms, and implementation.

Graphics

• comfyui — ComfyUI nodes Node herding for SlopGen ComfyUI — core graph, samplers, loaders, ControlNet, video packs, kill-list.
• opengl — OpenGL Buffers, VAOs, shaders, textures, framebuffers, and the core profile.
• shaders — Shaders GLSL, the pipeline, uniforms/varyings, lighting, SDFs, and common effects.
• webgpu — WebGPU Devices, pipelines, buffers, WGSL shaders, and the render/compute pipeline.

Game dev

• gamedev — GameDev patterns Fixed timestep, ECS vs OO, HFSM/BT, pooling, spatial picks, frame budget, and AI-slop kill-list.
• sdl — SDL2/SDL3 Game loop, window, rendering, input, audio, and textures with SDL2/SDL3.

Systems & CS

• algorithms — Algorithms Complexity classes, sorting, searching, data structures, and graphs.
• asm — Assembly Registers, instructions, addressing, calling conventions, and syscalls.
• dop — Data-Oriented Design Cache-friendly SoA vs AoS, data locality, ECS, and layout patterns.
• ebpf — eBPF Programs, maps, hooks, the verifier, and observability tooling.
• allocators — Memory allocators Bump, free lists, arenas, slab, buddy, and garbage collection.
• osdev — OS dev Booting, protected mode, interrupts, paging, and kernel basics.
• giants — Systems by the giants Lessons from nginx, Redis, the Linux kernel, and Carmack on fast systems.

Quantitative

• finance — Finance — value investing cheatsheet Statements, FCFF/FCFE, ratio herding, DCF, MoS, EDGAR workflow, and AI-slop kill-list.
• math — Mathematics Linear algebra, probability, calculus, discrete, and signal/DSP math for programmers.

Security

• pentesting — Pentesting Recon, scanning, exploitation, privilege escalation, and reporting.
• security — Security practices Auth, secrets, supply chain, hardening, web security, and incident response.

Editors

• neovim — Neovim Modes, motions, operators, text objects, config, and LSP.

Links

• links — Links A curated, curl-verified directory of useful links across every topic in this repo.

Experiments

Playable things that live in other repos. Linked, not hosted here.

• invader-rogue — Invader Rogue Space Invaders with roguelike upgrades and random challenge modifiers. Lives in its own repo — no build step, assets generated at runtime. source