chore(deps-dev): bump ruff from 0.15.13 to 0.15.14 in the development-dependencies group across 1 directory

.cargo/config.toml

@@ -0,0 +1,13 @@
+# Allow pyo3 cdylib crates to build with plain `cargo build` on macOS.
+# maturin sets this flag automatically; we replicate it here for workspace builds.
+#
+# NOTE: These flags are required by pyo3 (gf-bindings-py) but are not needed by
+# napi-rs (gf-bindings-node). napi-rs native builds use the pure-JS stub at the
+# skeleton stage, so the native crate is not compiled. When napi-rs native builds
+# are enabled in Milestone 14, move these flags into
+# crates/gf-bindings-py/.cargo/config.toml and remove them from here.
+[target.aarch64-apple-darwin]
+rustflags = ["-C", "link-arg=-undefined", "-C", "link-arg=dynamic_lookup"]
+
+[target.x86_64-apple-darwin]
+rustflags = ["-C", "link-arg=-undefined", "-C", "link-arg=dynamic_lookup"]

.editorconfig

@@ -51,3 +51,15 @@ indent_style = tab
 [.github/workflows/*.{yml,yaml}]
 indent_style = space
 indent_size = 2
+
+# Rust files
+[*.rs]
+indent_style = space
+indent_size = 4
+max_line_length = 100
+
+# JavaScript/TypeScript files
+[*.{js,ts,jsx,tsx}]
+indent_style = space
+indent_size = 2
+max_line_length = 100

.github/workflows/test.yml

@@ -2,7 +2,7 @@ name: Test Suite
 
 on:
   push:
-    branches: ["main", "develop"]
+    branches: ["main", "develop", "rust-core"]
   pull_request:
     branches: ["main"]
 
@@ -83,6 +83,77 @@ jobs:
       - name: Lint code
         run: uv run ruff check .
 
+  gherkin-lint:
+    name: Gherkin Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Install workspace dependencies
+        run: pnpm install
+
+      - name: Validate Gherkin syntax (cucumber-js dry-run)
+        run: |
+          # Exit code 2 = undefined steps (expected at skeleton stage).
+          # Redirect to file to avoid pipefail killing the script before we
+          # can inspect the exit code; cat the file for CI visibility.
+          node tests/features/node/node_modules/@cucumber/cucumber/bin/cucumber.js \
+            "tests/features/api/**/*.feature" \
+            "tests/features/tck/features/**/*.feature" \
+            --dry-run --no-strict > /tmp/gherkin-lint.log 2>&1 || EC=$?
+          EC=${EC:-0}
+          cat /tmp/gherkin-lint.log
+          if grep -iE "^Parse error|^SyntaxError|^Error: Parse" /tmp/gherkin-lint.log; then
+            echo "Gherkin parse errors found" && exit 1
+          fi
+          if [ "$EC" -ne 0 ] && [ "$EC" -ne 2 ]; then
+            echo "cucumber-js exited with unexpected code $EC" && exit "$EC"
+          fi
+          echo "All feature files parsed successfully"
+
+  rust-check:
+    name: Rust Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy, rustfmt
+
+      - name: Cache Cargo registry and build artifacts
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+
+      - name: cargo check
+        run: cargo check --workspace
+
+      - name: cargo clippy
+        run: cargo clippy --workspace -- -D warnings
+
+      - name: cargo fmt check
+        run: cargo fmt --all -- --check
+
   type-check:
     name: Type Checking (mypy)
     runs-on: ubuntu-latest

.gitignore

@@ -183,3 +183,25 @@ tck_*.txt
 
 # Perf baseline results (machine-specific, generated by make test-perf)
 benchmarks/real_dataset_baseline_v*.json
+
+# ==============================================================
+# Rust (Cargo)
+# ==============================================================
+/target/
+**/*.rs.bk
+# Note: Cargo.lock is tracked (binary crates present)
+
+# ==============================================================
+# Node (pnpm)
+# ==============================================================
+node_modules/
+*.node
+dist/
+.pnpm-store/
+.pnpm-debug.log
+
+# ==============================================================
+# maturin (Rust→Python build artifacts)
+# ==============================================================
+*.so
+*.pyd

CHANGELOG.md

@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### In Development — v0.5.0 (Rust Core, `rust-core` branch)
+- LALRPOP parser replacing Python LALR(1) executor
+- DataFusion-backed execution engine with Arrow result streams
+- `execute_arrow()` returning `pyarrow.Table` via Arrow C Data Interface
+- `execute_stream()` returning `pyarrow.RecordBatchReader`
+- Parquet storage provider (replaces SQLite in the Rust core)
+- PyO3 + maturin Python binding (`gf-bindings-py`)
+- napi-rs Node binding with Arrow IPC (`gf-bindings-node`)
+- See [ADR 0002](../adr/0002-rust-core.md) and [roadmap](../releases/roadmap.md)
+
 ## [0.4.0] - 2026-05-07
 
 ### Added