feat: bootstrap main with production-ready aztec-py codebase

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,image,pdf]"
+
+      - name: Run tests
+        run: |
+          pytest -q
+
+  quality:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,image,pdf]"
+
+      - name: Lint
+        run: |
+          ruff check .
+
+      - name: Type check
+        run: |
+          mypy --strict aztec_py
+
+  build:
+    runs-on: ubuntu-latest
+    needs: quality
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Build package
+        run: |
+          python -m pip install build
+          python -m build

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# IPython Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# dotenv
+.env
+
+# virtualenv
+venv/
+ENV/
+
+# Spyder project settings
+.spyderproject
+
+# Rope project settings
+.ropeproject

CHANGELOG.md

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+# Changelog
+
+## [1.0.0] - 2026-04-05
+
+### Fixed
+- CRLF encoding coverage and regressions aligned with upstream issue #5.
+- Error-correction capacity sizing bug fixed for worst-case stuffing payloads (upstream issue #7).
+
+### Added
+- Package split into `aztec_py` with modern `pyproject.toml` packaging.
+- SVG output support based on upstream PR #6 by Zazzik1.
+- CLI entry point (`aztec`) and `python -m aztec_py` runner.
+- PDF output (`AztecCode.pdf()` and extension-aware `save()` behavior).
+- `AztecRune` support for 0..255 values.
+- Optional decode helper (`aztec_py.decode`) backed by `python-zxing`.
+- Property-based tests with Hypothesis.
+- Input validation for public API boundaries.
+
+### Changed
+- Project metadata updated for fork lineage visibility.
+- Added explicit attribution artifacts: `LICENSE.upstream` and `CONTRIBUTORS.md`.

CONTRIBUTORS.md

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+# Contributors & Lineage
+
+## Authors
+- Originally written by Dmitry Alimov (delimitry).
+- Updates, bug fixes, and active maintenance in this fork by greyllmmoder.
+
+## Current maintainer
+- greyllmmoder - https://github.com/greyllmmoder
+
+## Upstream lineage (MIT license chain)
+This project is a fork of **dlenski/aztec_code_generator**
+(https://github.com/dlenski/aztec_code_generator), which is itself
+a fork of **delimitry/aztec_code_generator**
+(https://github.com/delimitry/aztec_code_generator).
+
+Both upstream projects are MIT licensed. The original upstream license
+text is preserved in `LICENSE.upstream`.
+
+## What changed from upstream
+- Fixed: CRLF encoding crash (upstream issue #5)
+- Fixed: Error correction capacity calculation (upstream issue #7)
+- Added: SVG renderer (based on upstream PR #6)
+- Added: Type hints, docstrings, CLI, PDF output, Rune mode
+- Restructured: Single-file module split into package
+
+## Third-party contributions incorporated
+- SVG support: originally authored by Zazzik1
+  (https://github.com/dlenski/aztec_code_generator/pull/6), MIT license

LICENSE.upstream

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+MIT License
+
+Copyright (c) 2016 Dmitry Alimov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MANIFEST.in

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+include README.md
+include requirements.txt
+include LICENSE
+include LICENSE.upstream
+include CONTRIBUTORS.md

PRODUCTION_CHECKLIST.md

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+# Production Checklist
+
+Use this checklist before shipping a new `aztec-py` version to production.
+
+## 1. Pre-Release Validation
+
+- [ ] `python -m pytest -q`
+- [ ] `python -m ruff check .`
+- [ ] `python -m mypy --strict aztec_py`
+- [ ] `python -m build`
+- [ ] `python scripts/decoder_matrix.py --report compat_matrix_report.md`
+- [ ] If decode runtime is available in CI: `python scripts/decoder_matrix.py --strict-decode`
+
+## 2. Runtime Optional Dependencies
+
+- [ ] Verify `aztec-py[pdf]` installs and `AztecCode(...).pdf()` works.
+- [ ] Verify `aztec-py[decode]` behavior:
+  - [ ] successful decode path when Java + ZXing are available
+  - [ ] clear error path when runtime/dependency is missing
+
+## 3. GS1 Integration Readiness
+
+- [ ] Build GS1 payloads using `GS1Element` + `build_gs1_payload`.
+- [ ] Ensure variable-length elements are marked with `variable_length=True`.
+- [ ] Confirm payloads with scanner app/hardware in target environment.
+
+## 4. Release Hygiene
+
+- [ ] Update `CHANGELOG.md`.
+- [ ] Confirm `README.md` examples still execute.
+- [ ] Verify version metadata in `pyproject.toml`.
+- [ ] Build artifacts from clean working tree.
+
+## 5. Post-Release Smoke Checks
+
+- [ ] Install built wheel in fresh venv.
+- [ ] `python -c "import aztec_py; print(aztec_py.__all__)"`
+- [ ] `aztec "Hello" --format terminal`
+- [ ] `aztec "Hello" --format svg > smoke.svg`
+- [ ] `aztec "Hello" --format png --output smoke.png`
+
+## 6. Incident Guardrails
+
+- [ ] Keep compatibility fixture failures as release blockers.
+- [ ] Log scanner model/runtime for each production decode issue.
+- [ ] Add a regression fixture for every production bug before patching.