feat: implement EMBP architecture with CI, tests, and refactor

- Add EMBP-style module structure (domain.rs, lib.rs)
- Add full integration tests running against real lambda runtime
- Refactor filtering logic for clarity and robustness
- Split CI into lint/test jobs with cargo-lambda caching and quiet mode
- Cleanup README and improve changelog

BREAKING CHANGE: Import paths changed to use library exports

Author: JohnBasrai

.github/workflows/ci.yml

@@ -13,15 +13,20 @@ jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/johnbasrai/cr8s/rust-dev:1.83.0-rev6
+      credentials:
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
 
-    - name: Install Rust
-      uses: dtolnay/rust-toolchain@stable
-      with:
-        components: rustfmt
+    - name: Show Rust version
+      run: |
+        rustc --version
+        cargo --version
 
     - name: Cache Cargo dependencies
       uses: actions/cache@v4
@@ -42,5 +47,60 @@ jobs:
     - name: Build release
       run: cargo build --release --quiet
 
-    - name: Run tests
-      run: cargo test --release --quiet
+    - name: Run unit tests only
+      run: cargo test --release --quiet --lib --bins
+
+    - name: Ensure cargo-lambda 1.8.5 is installed
+      env:
+        CARGO_HOME: /home/runner/.cargo
+        PATH: /home/runner/.cargo/bin:${{ env.PATH }}
+      run: |
+        echo "PATH=$PATH"
+        if ! command -v cargo-lambda &> /dev/null; then
+            cargo install cargo-lambda --version 1.8.5
+        fi
+
+    - name: Start lambda runtime in background
+      run: cargo lambda start --release &
+      env:
+        RUST_LOG: info
+
+    - name: Wait for lambda runtime to be ready
+      run: sleep 5
+
+    - name: Run integration tests
+      run: cargo test --quiet --test integration_tests --release
+      env:
+        RUST_LOG: info
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/johnbasrai/cr8s/rust-dev:1.83.0-rev6
+      credentials:
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Cache Cargo dependencies
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+          target/
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-cargo-
+
+    - name: Run Clippy
+      run: cargo clippy --quiet --all-targets --all-features -- -D warnings
+
+    - name: Run audit & outdated
+      run: cargo audit || cargo outdated || true

CHANGELOG.md

@@ -8,7 +8,46 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
 
 ## [Unreleased]
 
-- Awaiting license and attribution confirmation from the original author
+---
+
+## [0.2.0] – 2025-06-27
+
+### Added
+- **EMBP Architecture**: Implemented Explicit Module Boundary Pattern for clean code organization
+  - Created `src/domain.rs` module for core business entities (`Action`, `Priority`)
+  - Added `src/lib.rs` as EMBP gateway with controlled public exports
+  - Established clear module boundaries and import patterns
+- **Comprehensive Integration Testing**: Real end-to-end lambda testing with `cargo lambda invoke`
+  - Added 8 integration tests covering filtering, sorting, deduplication, and error handling
+  - Created/updated test data files: `01_sample-input.json`, `02_priority-input.json`, `03_bad-input.json`, `04_edge-cases.json`
+  - Implemented order-agnostic testing for robust HashMap-based results
+  - Added edge case testing for 7-day and 90-day boundary conditions
+- **Enhanced CI Pipeline**: Complete GitHub Actions workflow with parallel jobs
+  - Unit tests with `--lib --bins` for proper test isolation
+  - Integration tests with real lambda runtime execution (`cargo lambda start`)
+  - Code quality checks with `clippy --all-targets --all-features -- -D warnings`
+  - Code formatting validation with `rustfmt --check`
+- **Professional Documentation**: Comprehensive README with architecture patterns
+  - Added EMBP pattern explanation with link to specification
+  - Documented domain model, business rules, and processing examples
+  - Included testing strategy, usage instructions, and CI documentation
+  - Added development features and architecture benefits sections
+
+### Changed
+- **Module Structure**: Refactored for EMBP pattern compliance
+  - Moved domain types from `main.rs` to dedicated `domain.rs` module
+  - Updated import patterns: `use domain::{Action, Priority}` in binary, `pub use domain::*` in library
+  - Separated concerns between binary entry point and reusable library components
+- **Import Patterns**: Established clean module boundaries
+  - Binary imports from local modules: `use domain::Action`
+  - Library exports through gateway: `pub use domain::{Action, Priority}`
+  - External code imports from library: `use aws_lambda_action_filter::{Action, Priority}`
+
+### Fixed
+- **Test Reliability**: Resolved HashMap ordering dependencies in integration tests
+  - Implemented order-agnostic assertions using HashSet comparisons
+  - Eliminated brittle positional testing for same-priority results
+  - Added proper deduplication verification with timestamp checking
 
 ---
 

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "aws-lambda-action-filter"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 
 [dependencies]
@@ -11,5 +11,4 @@ serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"] }
-
+tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"] }