reverse-proxy/tasks/setup/project-init.md

id, name, status, depends_on, scope, risk, impact, level

id	name	status	depends_on	scope	risk	impact	level
setup/project-init	Initialize Rust project with Cargo, dependencies, and module skeleton	complete		moderate	low	project	implementation

Description

Initialize the Rust project from scratch. The repo currently has only docs/ and .git/. Set up a single-binary Rust project with all core dependencies per the architecture spec (overview.md), and create the module skeleton that subsequent tasks will fill in.

This is a single-binary project — there are no library exports. The product is the reverse-proxy binary.

Core Dependencies

Crate	Purpose
axum 0.8	HTTP framework, routing, middleware, extractors
tokio 1 (full)	Async runtime
hyper 1	HTTP protocol, proxy Client
tower 0.5	Middleware ecosystem, Service trait
rustls 0.23	TLS implementation, aws_lc_rs crypto provider
tokio-rustls 0.26	Async TLS I/O
rustls-acme 0.12	ACME client for Let's Encrypt
serde 1	Serialization
toml 0.8	Config format
arc-swap 1	Atomic config swap for DynamicConfig
tracing 0.1	Structured logging
tracing-subscriber 0.3	Log output (file + stdout)
rustls-pemfile 2	PEM parsing for manual cert loading
rustls-pki-types 1	TLS types (CertificateDer, PrivateKeyDer)
clap 4	CLI arguments
signal-hook 0.3	SIGTERM/SIGINT/SIGHUP handling

Pin exact versions in Cargo.toml per standard Rust practice.

Module Skeleton

src/
├── main.rs           — entry point, CLI parsing, startup orchestration
├── config/
│   ├── mod.rs         — config module, re-exports
│   ├── static_config.rs — StaticConfig, ListenerConfig, TlsConfig, LoggingConfig
│   ├── dynamic_config.rs — DynamicConfig, SiteConfig, RateLimitConfig
│   └── validation.rs  — config validation logic
├── proxy/
│   ├── mod.rs         — proxy module, re-exports
│   ├── handler.rs     — reverse proxy handler
│   ├── headers.rs     — proxy header injection
│   └── error.rs       — error response types
├── tls/
│   ├── mod.rs         — TLS module, re-exports
│   ├── acceptor.rs    — TLS acceptor construction (manual + ACME)
│   └── redirect.rs    — HTTP → HTTPS redirect handler
├── rate_limit/
│   ├── mod.rs         — rate limit module
│   └── bucket.rs      — token bucket implementation
├── logging/
│   ├── mod.rs         — logging module
│   └── format.rs      — custom structured log format
├── admin/
│   ├── mod.rs         — admin socket module
│   └── socket.rs      — Unix domain socket handler
├── health.rs          — health check endpoint
└── shutdown.rs        — graceful shutdown logic

Acceptance Criteria

• Cargo.toml with all dependencies listed in overview.md, exact versions pinned
• src/main.rs with minimal fn main() that compiles
• All module files exist with mod.rs re-exports and skeleton content
• cargo check succeeds with no errors
• cargo clippy succeeds with no warnings
• Binary name is reverse-proxy in Cargo.toml
• .gitignore covers target/
• Dual licensing: MIT OR Apache-2.0 in Cargo.toml

References

• docs/architecture/overview.md — crate dependencies, exports
• docs/architecture/config.md — config structure
• docs/architecture/proxy.md — proxy handler architecture
• docs/architecture/tls.md — TLS architecture
• docs/architecture/operations.md — rate limiting, logging, health check, shutdown

Notes

To be filled by implementation agent

Summary

To be filled on completion