Cheatsheets
Dense, printable references for the syntax and terms you need at a glance.
Claude Code essentials
Claude Code 2.1.260 commands and prompts for scoped sessions, project context, permissions, review, testing, automation, MCP, skills, and subagents.
Coding in the AI eraCodex CLI essentials
Codex CLI 0.153.0 commands for bounded agent runs, session control, automation, code review, MCP servers, and diagnostics.
Coding in the AI eraDocker 29 essentials
Printable Docker and Compose commands for builds, containers, networking, storage, security, inspection, and cleanup.
DevOps and cloudGit command-line essentials
A printable Git 2.43.0 reference for inspecting state, staging work, managing branches, integrating changes, undoing mistakes, and recovering commits.
CS foundationsGo 1.27 essentials
A printable reference for Go syntax, concurrency, standard-library boundaries, tests, benchmarks, and diagnostic commands.
GoHTTP API cheatsheet
Node 24 fetch patterns and HTTP API contracts for methods, statuses, media types, caching, retries, pagination, auth, and versioning.
BackendJavaScript cheatsheet
Node 24 syntax and runtime operations for values, functions, collections, errors, async work, modules, strings, and input boundaries.
JavaScriptPython essentials
Core Python 3.14 syntax and standard-library patterns for everyday lookup, from bindings and ABCs to asyncio, typing, and tooling.
PythonRegular expressions
Node 24 regular-expression syntax and APIs for matching, capture, Unicode text, replacement, validation, and dynamic patterns.
CS foundationsRust essentials
The Rust 1.98 syntax, error patterns, concurrency tools, and Cargo commands worth keeping beside the editor.
RustSQL essentials
Copyable SQLite 3.45.1 queries for filtering, joins, grouping, windows, writes, schema changes, transactions, and plan inspection.
Data and databasesTypeScript cheatsheet
Practical TypeScript 6 syntax for inference, narrowing, type transformations, declarations, and project checks.
TypeScript