Add AGENTS.md and issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,47 @@
+name: Bug report
+description: Report incorrect behavior, a crash, or a build failure
+labels: ["bug"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: What happened, and what did you expect?
+    validations:
+      required: true
+  - type: textarea
+    id: reproducer
+    attributes:
+      label: Reproducer
+      description: Minimal code or commands that trigger the problem.
+      render: python
+    validations:
+      required: true
+  - type: textarea
+    id: output
+    attributes:
+      label: Output
+      description: Full traceback or error output. Run with `DPCTL_VERBOSITY=warning` for C API diagnostics.
+      render: shell
+  - type: input
+    id: version
+    attributes:
+      label: dpctl version
+      description: Output of `python -c "import dpctl; print(dpctl.__version__)"`
+    validations:
+      required: true
+  - type: textarea
+    id: devices
+    attributes:
+      label: Devices
+      description: Output of `python -m dpctl -f`
+      render: shell
+    validations:
+      required: true
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: OS, Python version (and whether free-threaded), how dpctl was installed (conda/pip/source), DPC++ compiler version if built from source.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Questions and discussions
+    url: https://github.com/IntelPython/dpctl/discussions
+    about: Ask usage questions here.
+  - name: Security vulnerabilities
+    url: https://github.com/IntelPython/dpctl/blob/master/SECURITY.md
+    about: Report security issues privately, not as public issues.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,22 @@
+name: Feature request
+description: Propose new SYCL functionality or an API change
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: motivation
+    attributes:
+      label: Motivation
+      description: What do you need to do that dpctl does not support today?
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed API
+      description: Python, Cython, or C API you would like, and the SYCL feature it maps to.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered

.gitignore

@@ -104,3 +104,13 @@ dpctl/resources/cmake
 
 # asv artifacts
 *.asv*
+
+# agent-related
+.claude/settings.local.json
+.claude/worktrees/
+
+# virtual environments, test caches, local env files
+.venv/
+venv/
+.pytest_cache/
+.env

AGENTS.md

@@ -0,0 +1,125 @@
+# AGENTS.md
+
+dpctl is a Python/Cython wrapper over a subset of SYCL, built on a C API
+library (`libsyclinterface`). It is compiled with Intel oneAPI DPC++ (`icx`/`icpx`).
+
+## Environment
+
+- Activate the compiler before building or testing: `source /opt/intel/oneapi/setvars.sh`
+  (or use a conda env with `dpcpp_linux-64`). The environment does not persist
+  between shell invocations; source it in the same command:
+  `source /opt/intel/oneapi/setvars.sh && python -m pytest dpctl/tests/...`.
+- Check visible devices: `sycl-ls`. Tests skip on missing devices/aspects; a CPU
+  OpenCL device is enough for most of the suite.
+- Python build deps: `pip install numpy cython scikit-build cmake ninja pytest "versioneer[toml]==0.29"`.
+
+## Commands
+
+- Build in place + editable install: `python scripts/build_locally.py --verbose`
+  - defaults to `icx`/`icpx` on `PATH`; other compilers need `--compiler-root`
+  - `--debug`, `--clean`, `--target-cuda[=sm_XX]`, `--target-hip=<arch>`,
+    `--cmake-opts="-D..."`
+- Python tests: `python -m pytest dpctl/tests`
+  - one file: `python -m pytest dpctl/tests/test_sycl_queue.py`
+  - one test: `python -m pytest dpctl/tests/test_sycl_queue_memset.py::test_memset_partial_count`
+  - without a C compiler/Cython: add `-k "not test_cython_api and not test_c_headers"`
+- C API tests (GoogleTest, needs `GTEST_ROOT`): `(cd libsyclinterface && bash dbg_build.sh)`
+- Coverage (C + Python, rebuilds with `-DDPCTL_BUILD_CAPI_TESTS=ON`):
+  `python scripts/gen_coverage.py --oneapi`
+- Docs (needs doxyrest): `python scripts/gen_docs.py --doxyrest-root=<path>`
+- Lint/format one file (no build needed): `pre-commit run --files <path>`
+- Lint/format everything: `pre-commit run --all-files`
+  (black, isort, flake8, cython-lint, clang-format, codespell, bandit, shellcheck,
+  gitleaks, actionlint). Config: `pyproject.toml`, `.flake8`, `.clang-format`.
+
+## Structure
+
+- `libsyclinterface/` — C API over SYCL (C++ implementation)
+  - `include/syclinterface/*.h` — public C headers, `DPCTL<Type>_<Op>` functions
+  - `source/*.cpp` — implementations
+  - `tests/*.cpp` — GoogleTest suite; `*.spv` are prebuilt kernel fixtures
+- `dpctl/` — Python package
+  - `_backend.pxd` — Cython `extern` declarations of the C API
+  - `_sycl_*.pyx/.pxd` — `SyclDevice`, `SyclQueue`, `SyclContext`, `SyclEvent`, ...
+  - `memory/` — USM memory objects (`MemoryUSMDevice`, ...), IPC memory
+  - `compiler/` — `SyclKernelBundle` creation (SPIR-V, SYCL source)
+  - `program/` — deprecated alias of `dpctl.compiler`
+  - `utils/` — order manager, device queries, Intel device info
+  - `apis/include/` — Python C-API headers for extensions (`dpctl_capi.h`, `dpctl4pybind11.hpp`)
+  - `tests/` — pytest suite; `tests/helper/` has `get_queue_or_skip` and friends
+- `examples/` — python, cython, pybind11, c extension examples (each with README)
+- `docs/doc_sources/` — Sphinx sources
+- `conda-recipe/`, `conda-recipe-cf/` — conda packaging used by CI
+- `scripts/` — build, coverage, docs drivers
+
+## Adding a SYCL feature (typical PR shape)
+
+1. Declare in `libsyclinterface/include/syclinterface/dpctl_sycl_<x>_interface.h`
+   with a Doxygen comment and ownership attributes.
+2. Implement in `libsyclinterface/source/dpctl_sycl_<x>_interface.cpp`.
+3. Add GoogleTest cases in `libsyclinterface/tests/test_sycl_<x>_interface.cpp`.
+4. Declare in `dpctl/_backend.pxd`; wrap in `dpctl/_sycl_<x>.pyx` (and `.pxd` if
+   the method is `cdef`).
+5. Add pytest coverage in `dpctl/tests/`.
+6. Add a `CHANGELOG.md` entry with the PR link.
+
+Reference PRs to copy from:
+- New queue operation: gh-2361 (`DPCTLQueue_Memset` → `SyclQueue.memset`,
+  `dpctl/tests/test_sycl_queue_memset.py`).
+- New device info query: gh-2324 (`dpctl_sycl_device_interface.h` →
+  `dpctl/_sycl_device.pyx`; register the check in
+  `dpctl/tests/_device_attributes_checks.py`). New enums go through
+  `dpctl_sycl_enum_types.h`, `libsyclinterface/helper/`, and `dpctl/enum_types.py`.
+
+## Conventions
+
+### C API
+- Opaque refs (`DPCTLSyclQueueRef`, ...) via `wrap<T>`/`unwrap<T>`
+  (`dpctl_sycl_type_casters.hpp`).
+- Annotate ownership: `__dpctl_give` (caller must delete), `__dpctl_take`
+  (callee consumes), `__dpctl_keep` (borrowed). See `Support/MemOwnershipAttrs.h`.
+- Never let a C++ exception cross the C boundary: catch, call
+  `error_handler(e, __FILE__, __func__, __LINE__)`, return `nullptr`/error value.
+- Null-check every incoming ref and report via `error_handler`.
+- Errors are silent unless `DPCTL_VERBOSITY=warning` (or `error`) is set; set it
+  when debugging a `nullptr` return.
+
+### Cython / Python
+- Release the GIL (`with nogil:`) around calls that may block on the device.
+- Python-visible errors: raise specific exceptions (`TypeError`, `ValueError`,
+  `SyclQueueCreationError`, ...) when the C API returns `NULL`.
+- Free-threaded CPython (3.14t) is supported; do not rely on the GIL for
+  thread safety of shared state.
+- Line length 80 (black, isort, cython-lint, clang-format).
+
+### Tests
+- Get devices with `get_queue_or_skip()` / skip on missing aspects; never assume
+  a GPU or fp64 support.
+- Test both sync and `*_async` variants when adding queue operations.
+
+### Files
+- New files need the Apache-2.0 license header from `CONTRIBUTING.md`
+  (C/C++ headers also need the `\file` Doxygen block).
+- Comments and docstrings: short, describe what the code does.
+
+## Git
+
+- Branch off `master`; pre-commit blocks commits directly to `master` and
+  `maintenance/*`.
+- One concern per PR; fill in `.github/pull_request_template.md`.
+- Update `CHANGELOG.md` (Keep a Changelog sections: Added, Changed, Deprecated,
+  Removed, Fixed, Maintenance) for user-visible changes, citing `gh-NNNN`.
+
+## Boundaries
+
+- Generated, do not edit: `dpctl/*.cxx`, `dpctl/**/*.cxx`, `dpctl/include/`
+  (headers copied/generated at build time), `dpctl/_version.py` (versioneer),
+  `_skbuild/`, `build/`.
+- Edit C headers in `libsyclinterface/include/`, not their copies under `dpctl/include/`.
+- In-place `.so` files survive branch switches; rebuild (`--clean`) before
+  trusting test results after checking out another branch.
+- Changing an existing C API signature or enum value is a breaking change:
+  call it out in the PR and the CHANGELOG `NOTE` list.
+- `.github/workflows/` actions are pinned to commit SHAs (checked by zizmor);
+  keep that when adding steps.
+- `conda-recipe*/`, release versions, and doc version lists need maintainer review.