Add in-REPL session restoration and read-only config inspection so the CLI can recover saved conversations and expose Claude settings without leaving interactive mode. /resume now reloads a session file into the live runtime, and /config shows discovered settings files plus the merged effective JSON. The new commands stay on the shared slash-command surface and rebuild runtime state using the current model, system prompt, and permission mode so existing REPL behavior remains stable. Constraint: /resume must update the live REPL session rather than only supporting top-level --resume Constraint: /config should inspect existing settings without mutating user files Rejected: Add editable /config writes in this slice | read-only inspection is safer and sufficient for immediate parity work Confidence: high Scope-risk: moderate Reversibility: clean Directive: Keep resume/config behavior on the shared slash command surface so non-REPL entrypoints can reuse it later Tested: cargo fmt; cargo clippy --workspace --all-targets -- -D warnings; cargo test --workspace Not-tested: manual interactive restore against real saved session files outside automated fixtures
Rust port foundation
This directory contains the first compatibility-first Rust foundation for a drop-in Claude Code CLI replacement.
Current milestone
This initial milestone focuses on harness-first scaffolding, not full feature parity:
- a Cargo workspace aligned to major upstream seams
- a placeholder CLI crate (
rusty-claude-cli) - runtime, command, and tool registry skeleton crates
- a
compat-harnesscrate that reads the upstream TypeScript sources in../src/ - tests that prove upstream manifests/bootstrap hints can be extracted from the leaked TypeScript codebase
Workspace layout
rust/
├── Cargo.toml
├── README.md
├── crates/
│ ├── rusty-claude-cli/
│ ├── runtime/
│ ├── commands/
│ ├── tools/
│ └── compat-harness/
└── tests/
How to use
From this directory:
cargo fmt --all
cargo check --workspace
cargo test --workspace
cargo run -p rusty-claude-cli -- --help
cargo run -p rusty-claude-cli -- dump-manifests
cargo run -p rusty-claude-cli -- bootstrap-plan
Design notes
The shape follows the PRD's harness-first recommendation:
- Extract observable upstream command/tool/bootstrap facts first.
- Keep Rust module boundaries recognizable.
- Grow runtime compatibility behind proof artifacts.
- Document explicit gaps instead of implying drop-in parity too early.
Relationship to the root README
The repository root README explains the leaked TypeScript codebase. This document tracks the Rust replacement effort that lives in rust/.