Rust Programming

Cross-source synthesis of the CLAW-00 Rust HOW-TO series — a structured curriculum from installation through a working CLI application. This page is the entry point; individual lessons live in linked how-tos. Updated when new articles are added to the series.

Overview

Rust is a systems programming language built around a single idea: memory safety without garbage collection. The compiler enforces ownership and borrowing rules at compile time — if it compiles, common memory bugs (use-after-free, data races) are ruled out.

In this monorepo, Rust appears in two places:

• Wiki tutorials — step-by-step how-tos under content/wiki/howto-rust-*
• Companion code — rust/rust-concepts-demo/, a task manager CLI demonstrating the core concepts

Unlike AI research concepts in this wiki, Rust knowledge here is a stable curriculum, not an evolving research synthesis. The concept page maps the learning path; the how-tos teach the details.

The ownership model (central idea)

Most languages choose one of:

Approach	Examples	Trade-off
Garbage collection	Python, Java, Go	Easy, but runtime pauses
Manual memory	C, C++	Fast, but error-prone
Ownership	Rust	No GC, no manual free — compiler enforces rules

Rust's three ownership rules:

1. Each value has exactly one owner
2. When the owner goes out of scope, the value is dropped
3. Values can be borrowed (&T, &mut T) but only one mutable borrow at a time

Everything else in Rust — collections, error handling, traits — builds on these rules.

See Howto Rust Ownership Borrowing for the full tutorial.

Learning path

Follow this order for the core track. Cargo and structs can branch once basics are solid.

Step	Article	What you learn
1	Howto Install Rust Linux	rustup, rustc, cargo, build tools
2	Howto Rust Getting Started	First program, compilation, project layout
3	Howto Rust Functions Control Flow	Functions, if/match, loops
4	Howto Rust Ownership Borrowing	Moves, borrows, lifetimes intro
5	Howto Rust Collections	Vec, String, HashMap + ownership
6	Howto Rust Error Handling	Result, Option, ? operator
7	Howto Rust Structs Traits	Custom types, impl, traits
—	Howto Cargo Package Management	Dependencies, workspaces, crates.io (anytime after step 1)
8	Howto Rust Concepts Demo	Integrate steps 1–6 in a real CLI app

Capstone: After steps 1–6, run the companion demo:

cd rust/rust-concepts-demo
cargo run

Concept map

How the core ideas connect:

Ownership → Collections

Vec, String, and HashMap store data on the heap and follow ownership rules. Pushing to a Vec may move values; iterating often uses borrows (&item).

→ Howto Rust Collections

Ownership → Error handling

Result<T, E> and Option<T> are enums that own their payloads. The ? operator propagates errors while respecting ownership transfers.

→ Howto Rust Error Handling

Functions → Control flow → Pattern matching

match is Rust's primary branching tool and appears everywhere — especially with Result and Option.

→ Howto Rust Functions Control Flow

Structs & traits → Real abstractions

Structs define data; traits define behaviour (like interfaces). impl blocks attach methods; derive macros auto-implement common traits (Debug, Clone).

→ Howto Rust Structs Traits

Demo → All of the above

The task manager CLI in rust/rust-concepts-demo/ maps concepts to modules:

Module	Concepts
main.rs	Functions, match, user input
task.rs	Structs, Display trait, ownership in structs
task_manager.rs	Vec, HashMap, borrowing
storage.rs	File I/O, Result, ?
demo.rs	Standalone concept walkthroughs

→ Howto Rust Concepts Demo

Tooling

Tool	Role
rustup	Install and manage Rust versions
rustc	Compiler
cargo	Build, test, dependencies, publish

Cargo is the everyday interface — you rarely invoke rustc directly after the first lesson.

→ Howto Cargo Package Management

When to reach for Rust

Rust fits well when you need:

• Performance without GC pauses (CLIs, services, embedded)
• Memory safety in systems code (replacing C/C++ components)
• Concurrency with compile-time data-race prevention
• Reliable tooling — cargo test, cargo clippy from day one

In da-project-claw, Rust demonstrates language fundamentals; the journal and agent stack primarily use Python and TypeScript.

Series how-tos (full list)

Article	Summary
Howto Install Rust Linux	Install via rustup on Linux
Howto Rust Getting Started	First programs, rustc vs cargo
Howto Rust Functions Control Flow	Functions, loops, match
Howto Rust Ownership Borrowing	Ownership, moves, borrowing
Howto Rust Collections	Vec, String, HashMap
Howto Rust Error Handling	Result, Option, error propagation
Howto Rust Structs Traits	Structs, impl, traits
Howto Cargo Package Management	Cargo workflows
Howto Rust Concepts Demo	Task manager capstone

Planned extensions

Howto Rust Structs Traits references Generics & Lifetimes as a future article. When published, this concept page and the learning path should be updated.

Related content

• Companion repo: rust/rust-concepts-demo
• Monorepo layout: Mar 20, 2026 (Day One — stack-based directory structure)