analyze

name	analyze
description	Analyze Vela and liFS feature completeness compared to macOS/XNU, producing a completion scorecard
disable-model-invocation	true

Perform a full feature completeness analysis of the Vela OS and liFS filesystem, comparing against macOS (XNU kernel + APFS). No argument is needed — always analyze both:

• Vela kernel (Carina): ~/claude/vela/kernel/src/
• liFS filesystem: ~/claude/lifs/lifs-core/src/

Read the relevant source files before producing the report. Do not guess — check the actual code.

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What to look for

For each feature, read the file(s) and classify honestly:

• ✅ Complete — fully implemented, no TODOs, actually runs
• 🔧 In Progress — real logic present but missing pieces, stubbed I/O, or TODO blocks
• 🪵 Stub — file exists but is mostly scaffolding, empty bodies, unimplemented!(), or type definitions only
• ❌ Missing — no file, no code, feature doesn't exist at all

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Feature categories to evaluate

1. Memory Management

Compare to: XNU VM subsystem (Mach VM, compressor, UPL, anonymous memory, file-backed mappings)

• Physical frame allocator (buddy allocator)
• Kernel heap (slab + linked-list)
• Virtual memory areas / mmap
• Page tables + TLB management
• Guard pages + stack overflow detection
• Copy-on-write (CoW)
• Page cache (file-backed pages)
• Swap / compressed memory
• Huge pages / 2MB mappings
• NUMA awareness
• Memory pressure handling / OOM killer

2. Process & Thread Management

Compare to: BSD/Mach process model, pthreads, QoS classes

• Task/process creation and destruction
• Kernel threads
• User threads (multi-thread per process)
• Thread join / detach
• Process groups / sessions
• Zombie reaping
• CPU affinity / binding
• Priority / nice levels
• QoS / scheduling classes

3. Scheduler

Compare to: XNU scheduler (mach timeshare + realtime + fixed priority)

• Preemptive multitasking
• SMP scheduling (multi-core)
• Interactivity-aware fairness (ARIA vs XNU timeshare)
• Real-time scheduling class
• Work stealing
• Per-CPU run queues
• Idle threads / halt
• Timer-based preemption
• SMT / hyperthreading awareness

4. IPC

Compare to: Mach ports, XPC, pipes, Unix domain sockets, signals

• Kernel pipes (byte stream + message mode)
• Typed event system (replaces POSIX signals)
• IPC channels / ports
• Shared memory segments
• Unix domain sockets
• Message queues
• Dispatch queues (GCD equivalent)

5. System Calls & User Interface

Compare to: Mach traps + BSD syscalls + commpage

• Syscall fast path (SYSCALL/SYSRET)
• User memory access safety (SMAP guards)
• vDSO / commpage (fast time queries)
• ioctl / device control interface
• sysctl / kernel parameter interface
• Async I/O interface (io_queue / io_uring equivalent)

6. File System

Compare to: APFS (journaling, copy-on-write, snapshots, encryption, compression, clones)

• VFS abstraction layer
• liFS: superblock + format/mount
• liFS: inode management
• liFS: B-tree directory layout
• liFS: extent-based file data
• liFS: journaling / crash consistency
• liFS: block allocator
• liFS: compression (LZ4)
• liFS: extended attributes (xattr)
• liFS: symlinks
• liFS: permissions / capabilities
• liFS: snapshots
• liFS: encryption
• liFS: file cloning (reflinks)
• liFS: online resize
• RAM disk fallback
• FSEvents / filesystem notifications
• FUSE driver (lifs-linux)

7. Drivers & Hardware

Compare to: IOKit framework, Apple Silicon / Intel driver support

• PCI / PCIe enumeration
• SATA / AHCI disk
• NVMe disk
• USB 3.x host controller (xHCI)
• USB HID (keyboard / mouse)
• Real-time clock (RTC)
• Framebuffer / display output
• GPU / graphics acceleration (Metal equivalent)
• Network interface (Ethernet)
• WiFi
• Bluetooth
• Audio (CoreAudio equivalent)
• IOMMU / DMA protection

8. Security

Compare to: SMEP/SMAP, SIP, Gatekeeper, code signing, Sandbox, TCC, KASLR

• SMEP (no kernel execution of user pages)
• SMAP (no kernel access to user memory without guard)
• NX bit / data execution prevention
• W^X enforcement
• Kernel guard pages
• Capability-based ACL (vs macOS DAC + SIP)
• KASLR (kernel address space layout randomization)
• Sandboxing / entitlements (sandbox.rs)
• Secure boot / firmware trust
• Code signing / executable verification
• User authentication (login, password hashing)

9. Networking

Compare to: BSD TCP/IP stack, Network Kernel Extensions, pf firewall

• TCP/IP stack
• UDP
• IPv4 / IPv6
• BSD socket API
• Unix domain sockets
• Network filtering / firewall
• DNS resolution (userspace, but kernel stubs needed)

10. Power Management

Compare to: IOPMrootDomain, ACPI, sleep/wake, P-states, T-states

• ACPI table parsing
• CPU frequency scaling (P-states)
• Sleep / hibernate / wake
• Thermal management
• Power assertions (prevent sleep)
• Battery / power source monitoring

11. Time & Clocks

Compare to: mach_absolute_time, gettimeofday, timers, commpage clock

• Wall clock (RTC-backed)
• Monotonic clock
• High-resolution timer (LAPIC-backed)
• vDSO / commpage fast time access
• Timer coalescing
• POSIX timer API (timer_create)
• Time zones

12. Shell & Userspace

Compare to: zsh (macOS default), launchd, dyld

• hesh shell (built-ins + external commands)
• Init system / pid 1 (init.rs)
• Dynamic linker (dyld equivalent)
• Standard library / libc equivalent
• TTY / PTY subsystem (Pyxis — planned)

13. Debugging & Observability

Compare to: DTrace, kdebug, syslog, crash reporter, Instruments

• Serial console / kernel logging
• Kernel crash reporter
• DTrace / tracing framework
• Performance counters (PMU)
• Kernel debugger (LLDB/KDP equivalent)
• System profiling

14. SMP / Multi-Core

Compare to: XNU SMP bringup, per-CPU data, IPI, CPU hotplug

• ACPI MADT parsing (CPU topology discovery)
• Local APIC (per-CPU timer + IPI)
• AP startup (SIPI trampoline)
• Per-CPU data structures
• IPI (inter-processor interrupts)
• CPU hotplug

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Output format

For each category, print a subsection heading and a table:

Feature	Status	Notes
Physical frame allocator	✅ Complete	Buddy allocator, 13 orders, double-free detection
Copy-on-write	🔧 In Progress	VmaBacking::Cow structure exists, no page fault handler

After all categories, print:

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Completion Score

A table:

Category	Complete	In Progress	Stub	Missing	Score
Memory Management	5	2	0	4	45%
...
Total					XX%

Score formula per category: (Complete × 1.0 + InProgress × 0.4 + Stub × 0.1) / Total × 100

Then a single Overall Score: XX% line, weighted by category importance:

• Memory, Scheduler, Process Management, File System, Security: weight 2×
• IPC, Drivers, Syscalls, SMP: weight 1.5×
• Networking, Power, Debugging, Shell, Time: weight 1×

End with a Verdict paragraph: what Vela is today (research OS? daily-driver kernel? prototype?) and the top 3 features to complete next for maximum impact.