Pre-release

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          enable-cache: true
+
+      - name: Set up Python ${{ matrix.python-version }}
+        run: uv python install ${{ matrix.python-version }}
+
+      - name: Sync deps (project + dev group)
+        run: uv sync --python ${{ matrix.python-version }}
+
+      - name: Ruff
+        run: uv run --python ${{ matrix.python-version }} ruff check .
+
+      - name: Pytest
+        run: uv run --python ${{ matrix.python-version }} pytest -q
+
+  build:
+    runs-on: ubuntu-latest
+    needs: lint-and-test
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          enable-cache: true
+
+      - name: Build wheel + sdist
+        run: |
+          uv sync
+          uv run python -m build
+          uv run twine check --strict dist/*
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags: ["v*.*.*", "v*.*.*a*", "v*.*.*b*", "v*.*.*rc*"]
+  workflow_dispatch:
+    inputs:
+      target:
+        description: "Where to publish"
+        required: true
+        default: "testpypi"
+        type: choice
+        options:
+          - testpypi
+          - pypi
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          enable-cache: true
+
+      - name: Build wheel + sdist
+        run: |
+          uv sync
+          uv run python -m build
+          uv run twine check --strict dist/*
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+  publish-testpypi:
+    # TestPyPI publish:
+    #   * any pre-release tag (vX.Y.ZaN / bN / rcN), or
+    #   * manual dispatch with target=testpypi.
+    # Stable tags skip TestPyPI and go straight to PyPI.
+    runs-on: ubuntu-latest
+    needs: build
+    if: |
+      (startsWith(github.ref, 'refs/tags/v') &&
+        (contains(github.ref_name, 'a') || contains(github.ref_name, 'b') || contains(github.ref_name, 'rc')))
+      || (github.event_name == 'workflow_dispatch' && inputs.target == 'testpypi')
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/spiderwire
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+      - name: Publish to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+
+  publish-pypi:
+    # Real PyPI publish:
+    #   * stable tag (vX.Y.Z, no a/b/rc), or
+    #   * manual dispatch with target=pypi.
+    runs-on: ubuntu-latest
+    needs: build
+    if: |
+      (startsWith(github.ref, 'refs/tags/v') &&
+        !contains(github.ref_name, 'a') && !contains(github.ref_name, 'b') && !contains(github.ref_name, 'rc'))
+      || (github.event_name == 'workflow_dispatch' && inputs.target == 'pypi')
+    environment:
+      name: pypi
+      url: https://pypi.org/p/spiderwire
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1

.gitignore

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+# Byte-compiled / cache
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Distribution / packaging
+build/
+dist/
+*.egg-info/
+*.egg
+wheels/
+
+# Virtual envs
+.venv/
+venv/
+env/
+
+# Tooling caches
+.ruff_cache/
+.pytest_cache/
+.mypy_cache/
+.tox/
+.coverage
+htmlcov/
+
+# uv
+uv.lock.local
+
+# Local secrets / env
+.env
+.env.local
+
+# IDE / OS
+.idea/
+.vscode/
+.DS_Store

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0] - 2026-05-09
+
+Initial release.
+
+### Added
+
+- `spiderwire` library: Modbus RTU protocol (`protocol`), RS-485 transport
+  (`transport`), per-device register map and decoders (`registers`), and
+  tiered bus master with setpoint heartbeat (`bus`).
+- `gss-ctrl` CLI: `scan`, `poll`, `read`, `write`, `fan`, `blower`,
+  `light` commands. Acts as a stand-in master for the OEM SpiderFarmer
+  GSS hub on a USB-RS485 adapter.
+- Reference docs: `docs/protocol-analysis.md`, `docs/device-map.md`,
+  `docs/hw-notes.md`.
+
+[Unreleased]: https://github.com/1am/spiderwire/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/1am/spiderwire/releases/tag/v0.1.0