OxiBonsai 0.2.2 Release

[0.2.2] - 2026-06-08

Added

• oxibonsai repl interactive image REPL (oxibonsai-image, oxibonsai-cli): ImageSession
  loads the DiT, VAE, and text encoder once and renders many prompts without re-paying the
  load/dequant cost. StageTimings and RenderOutcome surface per-stage wall-clock splits.
  The session puts the text encoder in resident mode (TeWeights::set_resident) so the
  dequantised f32 weights (~16 GB) stay cached across renders on high-memory machines.
  On Ghostty the rendered image is shown inline via the kitty graphics protocol; on other
  terminals the PNG is written to a file. Runtime commands: :steps, :seed, :size,
  :fast (2-step 384×384 preview), :hq (8-step 512×512), :out, :open, :help, :quit.
• TeWeights::set_resident(on: bool) (oxibonsai-image): controls whether the Mlx4bit
  source caches dequantised f32 tensors across forwards. Off by default (preserves the one-shot
  CLI low-RAM profile); turned on by ImageSession for the REPL use-case.
• Kitty graphics protocol support (src/cli/term.rs): pure-Rust base64 encoder and inline
  PNG display for Ghostty terminals (kitty_supported() auto-detects via GHOSTTY_* env vars
  and TERM/TERM_PROGRAM).
• GPU acceleration flags documented in .env.example: OXI_DIT_ATTN_GPU (flash-attention,
  default-ON on Apple Silicon), OXI_VAE_GPU (convolutions, default-ON on Apple Silicon), and
  OXI_TE_GPU (text-encoder GPU, default-OFF — CPU SIMD wins on Apple Silicon; may help on
  Windows/NVIDIA CUDA) with platform-specific comments.
• CUDA TQ2 GEMV parity test (oxibonsai-kernels): isolated probe cuda_tq2_gemv_parity.rs
  for Blackwell GPU output validation; compile-gated behind cfg(feature = "cuda").

Changed

• decoded_chw_to_rgb8 extracted as shared helper (oxibonsai-image/pipeline.rs): CHW→HWC
  f32-to-u8 conversion factored into a pub(crate) function, shared by both text_to_image and
  ImageSession::render to guarantee byte-identical pixel output from both paths.
• oxionnx-proto bumped 0.1.3 → 0.1.4 (Cargo.toml workspace dependencies).

Full Changelog: v0.2.1...v0.2.2