# Changelog

## v0.3.0

### Added

- **Jinja chat templates** — switched from `llama_chat_apply_template()` C API to the full Jinja-based `common_chat_templates_apply()` engine from llama.cpp's common library.
- **`enable_thinking` option** — pass `enable_thinking: false` to `Chat.apply_template/3`, `chat/3`, `stream_chat/3`, `chat_completion/3`, and `stream_chat_completion/3` to disable CoT reasoning for models like Qwen3/3.5.
- **`chat_template_kwargs` option** — pass arbitrary key-value pairs to the Jinja template engine.
- **Penalty parameters** — `penalty_repeat`, `penalty_freq`, and `penalty_present` options for repetition/frequency/presence penalties in sampling.
- **OpenAI-compatible response format** — `chat_completion/3` and `stream_chat_completion/3` return `ChatCompletion` and `ChatCompletionChunk` structs.
- **Qwen3.5 benchmark results** in README — Qwen3.5-27B and Qwen3.5-35B-A3B on Apple M4 Max.

### Changed

- `Chat.apply_template/3` now uses the Jinja engine and takes the model ref directly (no longer accepts `:template` option for raw template strings).
- Linked `libcommon.a` from llama.cpp build (previously excluded).
- `LlamaModel` RAII wrapper now caches `common_chat_templates` at model load time.

## v0.2.0

### Added

- **Continuous batching server** (`LlamaCppEx.Server`) — GenServer with slot pool for concurrent multi-sequence inference. One forward pass per tick with decode tokens and prefill chunks mixed in a single batch.
- **Embeddings** (`LlamaCppEx.Embedding`) — `embed/3` and `embed_batch/3` with L2 normalization and configurable pooling type.
- **Grammar-constrained generation** — GBNF grammar support via `grammar` and `grammar_root` options in `Sampler.create/2` and `generate/3`.
- **Batched inference primitives** — `prefill/3`, `decode_batch/3`, `decode_token/4`, `batch_eval/2`, `sampler_sample_at/3` NIFs for building custom inference loops.
- **Streaming via Server** — `LlamaCppEx.Server.stream/3` for token-by-token streaming through the batched server.
- **Telemetry events** — `[:llama_cpp_ex, :server, :tick]` and `[:llama_cpp_ex, :server, :request, :done]` for observability.
- **Benchmark suite** (`bench/`) — Benchee-based benchmarks for single-sequence and server generation, plus a custom continuous batching harness measuring throughput scaling.

### Changed

- `Sampler.create/1` now requires the model as the first argument: `Sampler.create(model, opts)`.
- `Context.create/2` accepts new options: `:embeddings`, `:pooling_type`, `:n_seq_max`.

## v0.1.0

Initial release.

- Model loading and introspection
- Text generation with configurable sampling
- Streaming token generation via `Stream.resource/3`
- Chat template support
- Tokenization and detokenization
- Metal, CUDA, Vulkan, and CPU backends
- RAII resource management via `fine`