v0.7.0: Phase 6.5 -- Rust Compiler Port + Bash-in-Rust Shell

Phase 6.5: Rust Compiler Port + Bash-in-Rust Shell

Major milestone release completing Phase 6.5 -- 42 sprints across 6 waves delivering a cross-compiled Rust toolchain and a full Bash-compatible userland shell written entirely in Rust.

Highlights

• Rust std platform (std::sys::veridian): 15 source files (~7,800 lines) implementing fs, io, process, thread, net, time, alloc, and locks for the x86_64-unknown-veridian target
• LLVM + rustc cross-build pipeline: 7 build scripts for LLVM 19 cross-compilation, rustc Stage 0/1/2, cargo with vendored deps, and self-hosting verification
• Bash-in-Rust shell (vsh): 40 source files (~10,000 lines) with full Bash 5.3 feature parity -- lexer, recursive descent parser, 8-stage word expansion, fork+exec pipelines, 49 builtins, job control, readline (Emacs/vi modes), tab completion, and startup files
• Kernel/libc prerequisites: Memory scaling to 8GB per-process, epoll I/O multiplexing, full pthreads, POSIX signals (SIGTSTP/SIGCONT/SIGCHLD), PTY infrastructure, filesystem completions
• Test suite: 700+ bash test cases across 11 scripts + 12 Rust compiler integration tests
• Documentation: RUST-COMPILER-PORTING.md (764 lines), VSH-SHELL-GUIDE.md (805 lines), PHASE6.5-COMPLETION-SUMMARY.md (360 lines)

Stats

• 115 files changed, ~30,400 insertions, ~600 deletions
• Zero clippy warnings across all 3 architectures (x86_64, AArch64, RISC-V)
• All 3 architectures boot to Stage 6 BOOTOK with 29/29 tests passing

Wave Structure

Wave	Sprints	Focus	Lines
0	P-1..P-12	Kernel/libc prerequisites	~15,000
1	R-1..R-6	Rust std platform	~6,700
2	C-1..C-6	LLVM + rustc cross-build	~3,000
3	V-1..V-8	vsh core engine	~14,800
4	V-9..V-14	vsh builtins + job control	~10,100
5	T-1..T-4	Tests, docs, CI, release	~7,900

What's Next

Phase 7: Production Readiness -- GPU drivers (virtio-gpu DRM), advanced Wayland (xdg-decoration, clipboard, DnD), multimedia framework (audio mixer, codec pipeline), virtualization support, cloud-native features.