# Mission: Rust

## Why
Land a backend/CLI job that uses Rust. Two months on the book already happened, but the knowledge did not stick — the goal now is real fluency (can write and reason about Rust under pressure), not a second pass at "having read the book."

## Success looks like
- Explain ownership/borrowing rules without hesitating, and predict compile errors before running `cargo build`.
- Write a small CLI or backend service (e.g. a JSON API) from scratch, handling errors with `Result`/`?`, not `panic!`.
- Use structs, enums, traits, generics, and modules idiomatically in own code, not just recognize them in a book example.
- Pass a Rust-focused technical interview or take-home without needing to relearn fundamentals first.

## Constraints
- ~2 months already spent on [The Rust Book](https://doc.rust-lang.org/stable/book/), chapters 1–9 covered (variables through error handling), but retention is weak — treat as "seen before, not owned" until proven otherwise.
- Sessions are crash-course paced: prioritize fast, high-yield retrieval practice over slow first-pass reading.

## Out of scope
- Embedded / `no_std` Rust.
- Deep async internals — only as much async as a backend job needs (revisit if the job requires more).