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‎.github/AGENTS.md‎

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# AGENTS.md — .github/
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CI/CD workflows and repo automation.
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## Workflows (source of truth)
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- `conda-package.yml` — Intel channel conda build/test pipeline
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- `conda-package-cf.yml` — conda-forge-oriented build/test pipeline
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- `build-with-clang.yml` — clang compatibility checks
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- `build_pip.yaml` — wheel build pipeline
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- `pre-commit.yml` — lint/format checks
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- `openssf-scorecard.yml` — security scanning
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## Policy
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- Treat workflow YAML as canonical for platform/Python matrices.
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- Avoid doc claims about CI coverage unless present in workflow config.

‎.github/copilot-instructions.md‎

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# GitHub Copilot Instructions — mkl_fft
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## Identity
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You are an expert Python/C/Cython developer working on `mkl_fft` at Intel.
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Prioritize correctness, API compatibility, and minimal diffs.
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## Source of truth
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This file is canonical for Copilot/agent behavior.
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`AGENTS.md` files provide project context.
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## Precedence
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copilot-instructions > nearest AGENTS > root AGENTS
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Higher-precedence file overrides lower-precedence context.
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## Mandatory flow
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1. Read root `AGENTS.md`. If absent, stop and report.
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2. For each edited file, locate and follow the nearest `AGENTS.md`.
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3. If no local file exists, inherit from root `AGENTS.md`.
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## Contribution expectations
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- Keep changes atomic and single-purpose.
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- Preserve NumPy/SciPy FFT compatibility by default.
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- If touching interface wrappers/patch adapters, preserve reversible behavior and update interface tests.
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- For behavior changes: update/add tests in `mkl_fft/tests/` in the same change.
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- For bug fixes: include a regression test.
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- Run `pre-commit run --all-files` when `.pre-commit-config.yaml` is present.
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## Authoring rules
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- Never invent versions, build flags, CI matrices, or channel policies.
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- Use source-of-truth files for mutable details.
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- **C templates:** edit only `mkl_fft/src/*.c.src`; do not manually edit generated `.c` files.
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- Prefer stable local entry points:
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- `python -m pip install -e .`
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- `pytest mkl_fft/tests`
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## Source-of-truth files
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- Build/config: `pyproject.toml`, `setup.py`
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- Dependencies: `pyproject.toml`, `conda-recipe/meta.yaml`, `conda-recipe-cf/meta.yaml`
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- CI: `.github/workflows/*.{yml,yaml}`
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- API: `mkl_fft/__init__.py`, `mkl_fft/interfaces/*.py`, `mkl_fft/_pydfti.pyx` (interface wrappers are integration/patch entry points)
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- Tests: `mkl_fft/tests/`
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## Intel-specific constraints
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- Build-time MKL: `mkl-devel`; runtime MKL integration via `mkl-service`
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- Performance claims require reproducible benchmark context
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- Do not introduce ISA-specific assumptions outside explicit build configuration

‎AGENTS.md‎

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# AGENTS.md — mkl_fft
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Entry point for agent context in this repo.
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## What this project is
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`mkl_fft` is a NumPy/SciPy-compatible FFT interface backed by Intel® oneMKL.
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It provides accelerated FFT transforms while aiming to preserve upstream API behavior.
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## Key components
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- **Package:** `mkl_fft/`
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- **Cython bindings:** `mkl_fft/_pydfti.pyx`
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- **Template-based C backend:** `mkl_fft/src/*.c.src`
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- **Interface adapters:** `mkl_fft/interfaces/`
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- **Tests:** `mkl_fft/tests/`
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- **Vendored helpers:** `_vendored/`
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- **Packaging:** `conda-recipe/`, `conda-recipe-cf/`
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## Build/runtime basics
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- Build system: `pyproject.toml` + `setup.py`
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- Build deps: `cython`, `numpy`, `mkl-devel`
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- Runtime deps: `numpy`, `mkl-service`
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## Development guardrails
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- Preserve NumPy/SciPy FFT API compatibility unless change is explicitly requested.
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- Edit template sources (`*.c.src`), not generated C artifacts.
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- Pair behavior changes with tests and keep diffs minimal.
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- If interface-level patching/wrapping behavior is changed, keep it explicit, reversible, and documented.
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- Avoid hardcoding mutable versions/matrices/channels in docs.
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## Where truth lives
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- Build/config: `pyproject.toml`, `setup.py`
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- Dependencies: `pyproject.toml`, `conda-recipe*/meta.yaml`
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- CI/workflows: `.github/workflows/*.{yml,yaml}`
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- Public API: `mkl_fft/__init__.py`, `mkl_fft/interfaces/` (including wrapper/patch adapter modules)
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- Tests: `mkl_fft/tests/`
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For behavior policy, see `.github/copilot-instructions.md`.
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## Directory map
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Use nearest local `AGENTS.md` when present:
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- `.github/AGENTS.md` — CI workflows and automation policy
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- `mkl_fft/AGENTS.md` — package-level implementation context
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- `mkl_fft/interfaces/AGENTS.md` — NumPy/SciPy interface adapters
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- `mkl_fft/src/AGENTS.md` — C template backend rules
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- `mkl_fft/tests/AGENTS.md` — test scope/conventions
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- `conda-recipe/AGENTS.md` — Intel-channel conda packaging
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- `conda-recipe-cf/AGENTS.md` — conda-forge recipe context
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- `_vendored/AGENTS.md` — vendored tooling boundaries

‎_vendored/AGENTS.md‎

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# AGENTS.md — _vendored/
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Vendored utilities used by build/code-generation flows.
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## Guardrails
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- Prefer updating upstream source when feasible; keep local vendored diffs minimal.
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- Do not refactor vendored code opportunistically in unrelated PRs.
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- If vendored logic affects generated sources, validate downstream build/test paths.

‎conda-recipe-cf/AGENTS.md‎

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# AGENTS.md — conda-recipe-cf/
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Conda-forge recipe context for `mkl_fft`.
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## Scope
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- conda-forge specific recipe files under this directory.
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## Guardrails
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- Keep conda-forge recipe semantics separate from Intel-channel recipe.
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- Align changes with `conda-package-cf.yml` workflow behavior.

‎conda-recipe/AGENTS.md‎

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# AGENTS.md — conda-recipe/
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Intel-channel conda packaging context.
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## Scope
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- `meta.yaml` — package metadata and dependency pins
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- `build.sh` / `bld.bat` — platform build scripts
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## Guardrails
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- Treat recipe files as canonical for packaging intent.
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- Keep recipe updates synchronized with CI workflow behavior.

‎mkl_fft/AGENTS.md‎

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# AGENTS.md — mkl_fft/
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Core package implementation for MKL-backed FFT operations.
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## Key files
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- `__init__.py` — public package API surface
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- `_pydfti.pyx` — Cython bindings for DFTI interactions
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- `_mkl_fft.py` / `_fft_utils.py` — runtime FFT helper logic
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- `interfaces/` — NumPy/SciPy adapter modules
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- `src/` — C template backend (`*.c.src`)
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- `tests/` — package tests (see local AGENTS in tests)
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## Guardrails
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- Preserve NumPy/SciPy-compatible behavior by default.
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- Keep adapter, binding, and backend changes coordinated with tests.
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- Treat interface wrappers as patch/integration points: behavior changes must stay explicit and reversible.
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- Prefer minimal isolated edits around changed API paths.

‎mkl_fft/interfaces/AGENTS.md‎

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# AGENTS.md — mkl_fft/interfaces/
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Adapter layer for `numpy.fft` / `scipy.fft` style interfaces.
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## Scope
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- Interface modules mapping user-facing calls to MKL-backed implementation.
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## Guardrails
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- Preserve function signatures and behavioral expectations unless explicitly requested.
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- Keep compatibility with upstream NumPy/SciPy semantics in mind.
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- Any user-visible behavior change here should include tests in `mkl_fft/tests/`.

‎mkl_fft/src/AGENTS.md‎

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# AGENTS.md — mkl_fft/src/
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C template backend for FFT internals.
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## Scope
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- Template sources (`*.c.src`) used to generate C implementation artifacts.
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## Guardrails
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- Edit template files (`*.c.src`) rather than generated `.c` files.
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- Keep template changes tightly scoped and validated by tests.
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- Coordinate with Cython/binding/API layers when changing function behavior.

‎mkl_fft/tests/AGENTS.md‎

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# AGENTS.md — mkl_fft/tests/
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Test suite for FFT API compatibility and regressions.
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## Expectations
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- Behavior changes should include test updates in the same PR.
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- Bug fixes require regression tests.
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- Keep tests deterministic and avoid brittle performance-dependent assertions.
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## Entry point
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- `pytest mkl_fft/tests`

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