use panache on chapters

.github/workflows/panache.yaml

@@ -0,0 +1,24 @@
+name: panache
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  panache:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: posit-dev/setup-air@v1
+      # Lint disabled until panache has a fix for
+      # `[lint.rules] undefined-reference-label = false` being ignored
+      # (book-wide false positives on subfig refs and cross-file refs we
+      # cannot suppress).
+      - uses: jolars/panache-action@v1
+        with:
+          path: chapters/
+          lint: "false"

README.Rmd

@@ -31,3 +31,12 @@ remotes::install_deps(dependencies = TRUE)
 ```
 
 We use [Quarto](https://quarto.org/) to render this book.
+
+## Formatting and linting
+
+This project uses [panache](https://panache.bz/) to format and lint the Quarto documents. For the code cells, panache uses [air](https://posit-dev.github.io/air/) and [jarl](https://jarl.etiennebacher.com/) for formatting and linting, respectively.
+
+```bash
+panache format chapters/
+panache lint chapters/
+```

README.md

@@ -4,6 +4,7 @@
 # Causal Inference in R
 
 <!-- badges: start -->
+
 <!-- badges: end -->
 
 This repository contains the source code for the book *Causal Inference
@@ -20,3 +21,16 @@ remotes::install_deps(dependencies = TRUE)
 ```
 
 We use [Quarto](https://quarto.org/) to render this book.
+
+## Formatting and linting
+
+This project uses [panache](https://panache.bz/) to format and lint the
+Quarto documents. For the code cells, panache uses
+[air](https://posit-dev.github.io/air/) and
+[jarl](https://jarl.etiennebacher.com/) for formatting and linting,
+respectively.
+
+``` bash
+panache format chapters/
+panache lint chapters/
+```

chapters/00-setup.qmd

@@ -1,5 +1,6 @@
 ```{r}
 #| include: false
+
 source(here::here("R/ggdag-mask.R"))
 source(here::here("R/setup.R"))
 library(tidyverse)