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‎.github/workflows/ci.yml‎

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name: ci
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on:
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push:
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branches:
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- main
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pull_request:
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permissions:
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contents: read
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jobs:
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test:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- uses: Swatinem/rust-cache@v2
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- run: cargo test --locked --all-targets

‎.github/workflows/release.yml‎

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name: release
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on:
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push:
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tags:
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- "v*"
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permissions:
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contents: write
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jobs:
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test:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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- uses: Swatinem/rust-cache@v2
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- run: cargo test --locked --all-targets
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build:
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needs: test
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strategy:
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fail-fast: false
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matrix:
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include:
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## macOS: aarch64, x86_64
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- target: aarch64-apple-darwin,
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os: macos-latest
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- target: x86_64-apple-darwin,
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os: macos-latest
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## Linux:
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## Linux: aarch64, x86_64
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- target: aarch64-unknown-linux-gnu
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os: ubuntu-latest
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- target: aarch64-unknown-linux-musl,
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os: ubuntu-latest
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- target: x86_64-unknown-linux-gnu,
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os: ubuntu-latest
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- target: x86_64-unknown-linux-musl
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os: ubuntu-latest
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## Windows: x86_64
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- target: x86_64-pc-windows-msvc,
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os: windows-latest
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- target: x86_64-pc-windows-gnu
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os: windows-latest
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# FreeBSD: x86_64
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- target: x86_64-unknown-freebsd
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os: ubuntu-latest
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runs-on: ${{ matrix.os }}
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@stable
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with:
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targets: ${{ matrix.target }}
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- uses: Swatinem/rust-cache@v2
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- run: cargo build --release --locked --target ${{ matrix.target }}
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- name: Prepare dist
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shell: bash
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run: |
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mkdir -p dist
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cp "target/${{ matrix.target }}/release/diff-coverage" dist/
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cp README.md dist/
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- name: Package (tar.gz)
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if: runner.os != 'Windows'
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shell: bash
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run: |
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archive="diff-cover-${{ github.ref_name }}-${{ matrix.target }}.tar.gz"
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tar -czf "$archive" -C dist .
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echo "archive=$archive" >> "$GITHUB_OUTPUT"
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- name: Package (zip)
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if: runner.os == 'Windows'
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shell: pwsh
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run: |
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$archive = "diff-cover-${{ github.ref_name }}-${{ matrix.target }}.zip"
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Compress-Archive -Path dist\* -DestinationPath $archive
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"archive=$archive" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
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- name: Upload release assets
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uses: softprops/action-gh-release@v2
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with:
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files: |
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diff-cover-${{ github.ref_name }}-${{ matrix.target }}.*

‎.gitignore‎

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# Generated by Cargo
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# will have compiled files and executables
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debug
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target
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# These are backup files generated by rustfmt
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**/*.rs.bk
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# MSVC Windows builds of rustc generate these, which store debugging information
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*.pdb
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# Generated by cargo mutants
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# Contains mutation testing data
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**/mutants.out*/
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# RustRover
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# JetBrains specific template is maintained in a separate JetBrains.gitignore that can
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# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
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# and can be added to the global gitignore or merged into this file. For a more nuclear
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# option (not recommended) you can uncomment the following to ignore the entire idea folder.
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.idea/
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# Covers JetBrains IDEs: IntelliJ, GoLand, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
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# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
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# User-specific stuff
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.idea/**/workspace.xml
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.idea/**/tasks.xml
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.idea/**/usage.statistics.xml
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.idea/**/dictionaries
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.idea/**/shelf
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# AWS User-specific
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.idea/**/aws.xml
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# Generated files
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.idea/**/contentModel.xml
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# Sensitive or high-churn files
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.idea/**/dataSources/
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.idea/**/dataSources.ids
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.idea/**/dataSources.local.xml
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.idea/**/sqlDataSources.xml
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.idea/**/dynamic.xml
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.idea/**/uiDesigner.xml
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.idea/**/dbnavigator.xml
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# Gradle
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.idea/**/gradle.xml
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.idea/**/libraries
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# Gradle and Maven with auto-import
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# When using Gradle or Maven with auto-import, you should exclude module files,
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# since they will be recreated, and may cause churn. Uncomment if using
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# auto-import.
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# .idea/artifacts
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# .idea/compiler.xml
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# .idea/jarRepositories.xml
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# .idea/modules.xml
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# .idea/*.iml
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# .idea/modules
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# *.iml
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# *.ipr
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# CMake
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cmake-build-*/
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# Mongo Explorer plugin
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.idea/**/mongoSettings.xml
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# File-based project format
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*.iws
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# IntelliJ
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out/
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# mpeltonen/sbt-idea plugin
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.idea_modules/
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# JIRA plugin
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atlassian-ide-plugin.xml
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# Cursive Clojure plugin
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.idea/replstate.xml
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# SonarLint plugin
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.idea/sonarlint/
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.idea/sonarlint.xml # see https://community.sonarsource.com/t/is-the-file-idea-idea-idea-sonarlint-xml-intended-to-be-under-source-control/121119
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# Crashlytics plugin (for Android Studio and IntelliJ)
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com_crashlytics_export_strings.xml
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crashlytics.properties
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crashlytics-build.properties
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fabric.properties
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# Editor-based HTTP Client
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.idea/httpRequests
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http-client.private.env.json
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# Android studio 3.1+ serialized cache file
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.idea/caches/build_file_checksums.ser
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# Apifox Helper cache
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.idea/.cache/.Apifox_Helper
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.idea/ApifoxUploaderProjectSetting.xml
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# Github Copilot persisted session migrations, see: https://github.com/microsoft/copilot-intellij-feedback/issues/712#issuecomment-3322062215
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.idea/**/copilot.data.migration.*.xml
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.rustc_info.json

‎CHANGELOG.md‎

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# 0.1.0 - 2026-01-29
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We're excited to ship the very first release of diff-coverage, a developer‑focused CLI that makes coverage on changed code
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fast, reliable, and CI‑friendly. Built for teams who want actionable coverage signals without slow or unreliable pipelines.
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What's new
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- Blazing‑fast runs: up to ~108× faster mean wall‑time vs Python diff‑cover in larger runs
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- Memory‑efficient processing: ~21–28× lower peak RSS memory usage
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- Coverage directories supported: point to directories (not just single files) for flexible CI setups
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- `--fail-under` support: enforce quality gates directly in your pipeline
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Why it matters diff-coverage is designed for modern dev workflows—fast enough for tight inner loops, strict enough for
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CI, and predictable across mono‑repos and multi‑coverage setups.
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Thanks for being part of the very first release — more to come!

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