feat!: rewrite toon_format with full TOON 4.1 support

.devcontainer/devcontainer.json

@@ -1,29 +1,25 @@
 {
-  // To customize this for your local environment without committing changes,
-  // create a .devcontainer/devcontainer.local.json file (it's gitignored).
-  // See .devcontainer/README.md for examples.
-  "name": "toon-python (devcontainer)",
-  "build": {
-    "dockerfile": "Dockerfile.dev",
-    "context": ".."
-  },
-  "workspaceFolder": "/app",
-  "mounts": [
-    "source=${localWorkspaceFolder},target=/app,type=bind,consistency=cached"
-  ],
+  "name": "toon-python",
+  "image": "mcr.microsoft.com/devcontainers/python:3.14-trixie",
   "features": {
-    "ghcr.io/devcontainers/features/git:1": {},
     "ghcr.io/devcontainers/features/github-cli:1": {}
   },
-  "remoteEnv": {
-    // Python environment variables (can be overridden in devcontainer.local.json)
-    // These supplement the ENV vars set in Dockerfile.dev
+  "containerEnv": {
+    // Keep the container's virtualenv out of the mounted repository, so it
+    // never replaces the host's .venv.
+    "UV_PROJECT_ENVIRONMENT": "/home/vscode/.venv",
+    "UV_LINK_MODE": "copy"
   },
-  "postCreateCommand": "uv sync --all-groups",
+  "postCreateCommand": ".devcontainer/post-create.sh",
   "customizations": {
     "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "ms-python.mypy-type-checker",
+        "charliermarsh.ruff"
+      ],
       "settings": {
-        "python.defaultInterpreterPath": "/app/.venv/bin/python"
+        "python.defaultInterpreterPath": "/home/vscode/.venv/bin/python"
       }
     }
   }

.devcontainer/post-create.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+# Kept in a file so postCreateCommand is a single word: Zed joins the
+# arguments of lifecycle commands without quoting them.
+set -eu
+pipx install uv
+uv sync --all-groups
+uv run prek install

.editorconfig

@@ -5,18 +5,9 @@ charset = utf-8
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
-
-[*.{py,pyi}]
-indent_style = space
-indent_size = 4
-
-[*.{yml,yaml}]
 indent_style = space
 indent_size = 2
 
-[*.{json,toml}]
-indent_style = space
-indent_size = 2
-
-[*.md]
-trim_trailing_whitespace = false
+[*.{py,pyi}]
+indent_size = 4
+max_line_length = 88

.github/dependabot.yml

@@ -0,0 +1,16 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    groups:
+      actions:
+        patterns: ["*"]
+  - package-ecosystem: uv
+    directory: /
+    schedule:
+      interval: monthly
+    groups:
+      dev-dependencies:
+        patterns: ["*"]

.github/workflows/ci.yml

@@ -0,0 +1,79 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    name: Lint and type check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: true
+      - run: uv sync --locked
+      - run: uv run ruff check .
+      - run: uv run ruff format --check .
+      - run: uv run mypy
+
+  docs:
+    name: Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: true
+      - run: uv run --locked --group docs mkdocs build --strict
+
+  test:
+    name: Test (Python ${{ matrix.python-version }}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        include:
+          - os: macos-latest
+            python-version: "3.14"
+          - os: windows-latest
+            python-version: "3.14"
+    env:
+      HYPOTHESIS_PROFILE: ci
+    steps:
+      - uses: actions/checkout@v5
+      - uses: astral-sh/setup-uv@v7
+        with:
+          enable-cache: true
+          python-version: ${{ matrix.python-version }}
+      - run: uv sync --locked
+      - run: uv run pytest --cov --cov-report=term --cov-report=xml --cov-fail-under=95
+      - uses: actions/upload-artifact@v5
+        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.14'
+        with:
+          name: coverage
+          path: coverage.xml
+
+  build:
+    name: Build distributions
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: astral-sh/setup-uv@v7
+      - run: uv build
+      - name: Smoke test the wheel
+        run: |
+          uv run --isolated --no-project --with dist/toon_format-*.whl python -c \
+            "import toon_format as t; assert t.loads(t.dumps({'a': [1, 2]})) == {'a': [1, 2]}"