From b792688776899fa254f94c43ced90d04d5d2b251 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=83=AA=E3=82=AD=E8=90=8C?= <commits@liquidev.net>
Date: Thu, 10 Jul 2025 16:50:41 +0200
Subject: [PATCH] remove treehouse-format crate and collapse everything into
 src

---
 Cargo.lock                                    | 37 +++++++++++------
 Cargo.toml                                    | 38 +++++++++++++++---
 crates/treehouse-format/Cargo.toml            |  7 ----
 crates/treehouse-format/src/lib.rs            | 32 ---------------
 crates/treehouse/Cargo.toml                   | 36 -----------------
 {crates/treehouse/src => src}/cli.rs          |  0
 {crates/treehouse/src => src}/cli/fix.rs      |  2 +-
 {crates/treehouse/src => src}/cli/serve.rs    |  0
 .../src => src}/cli/serve/live_reload.rs      |  0
 .../src => src}/cli/serve/picture_upload.rs   |  0
 {crates/treehouse/src => src}/cli/wc.rs       |  3 +-
 {crates/treehouse/src => src}/config.rs       |  0
 {crates/treehouse/src => src}/dirs.rs         |  0
 {crates/treehouse/src => src}/fun.rs          |  0
 {crates/treehouse/src => src}/fun/seasons.rs  |  0
 {crates/treehouse/src => src}/generate.rs     |  0
 .../treehouse/src => src}/generate/atom.rs    |  0
 .../src => src}/generate/dir_helper.rs        |  0
 .../generate/include_static_helper.rs         |  0
 .../src => src}/generate/simple_template.rs   |  0
 .../treehouse/src => src}/generate/tree.rs    |  0
 {crates/treehouse/src => src}/history.rs      |  0
 {crates/treehouse/src => src}/html.rs         |  0
 .../treehouse/src => src}/html/breadcrumbs.rs |  0
 {crates/treehouse/src => src}/html/djot.rs    |  0
 .../treehouse/src => src}/html/highlight.rs   |  0
 .../src => src}/html/highlight/compiled.rs    |  0
 .../src => src}/html/highlight/tokenize.rs    |  0
 {crates/treehouse/src => src}/html/navmap.rs  |  0
 {crates/treehouse/src => src}/html/tree.rs    |  5 ++-
 {crates/treehouse/src => src}/import_map.rs   |  0
 {crates/treehouse/src => src}/lib.rs          |  0
 {crates/treehouse/src => src}/main.rs         |  0
 {crates/treehouse/src => src}/parse.rs        |  8 ++--
 {crates/treehouse/src => src}/paths.rs        |  0
 {crates/treehouse/src => src}/sources.rs      |  0
 {crates/treehouse/src => src}/state.rs        |  0
 {crates/treehouse/src => src}/tree.rs         | 40 ++++++++++++++++---
 .../treehouse-format/src => src/tree}/ast.rs  |  2 +-
 .../treehouse/src => src}/tree/attributes.rs  |  0
 src/tree/lib.rs                               |  1 +
 .../src => src}/tree/mini_template.rs         |  0
 .../treehouse-format/src => src/tree}/pull.rs |  2 +-
 {crates/treehouse/src => src}/vfs.rs          |  0
 {crates/treehouse/src => src}/vfs/anchored.rs |  0
 {crates/treehouse/src => src}/vfs/asynch.rs   |  0
 {crates/treehouse/src => src}/vfs/cd.rs       |  0
 .../src => src}/vfs/content_cache.rs          |  0
 .../src => src}/vfs/content_version_cache.rs  |  0
 {crates/treehouse/src => src}/vfs/edit.rs     |  0
 {crates/treehouse/src => src}/vfs/file.rs     |  0
 .../src => src}/vfs/html_canonicalize.rs      |  0
 .../src => src}/vfs/image_size_cache.rs       |  0
 {crates/treehouse/src => src}/vfs/mem_dir.rs  |  0
 {crates/treehouse/src => src}/vfs/overlay.rs  |  0
 {crates/treehouse/src => src}/vfs/path.rs     |  0
 {crates/treehouse/src => src}/vfs/physical.rs |  0
 static/css/main.css                           |  9 +++--
 template/_doc.hbs                             | 35 ++++++++++++++++
 {crates/treehouse/tests => tests}/it/main.rs  |  0
 {crates/treehouse/tests => tests}/it/vfs.rs   |  0
 .../treehouse/tests => tests}/it/vfs/cd.rs    |  0
 .../treehouse/tests => tests}/it/vfs/file.rs  |  0
 .../tests => tests}/it/vfs/mount_points.rs    |  0
 .../tests => tests}/it/vfs/physical.rs        |  0
 .../tests => tests}/it/vfs_physical/test.txt  |  0
 66 files changed, 145 insertions(+), 112 deletions(-)
 delete mode 100644 crates/treehouse-format/Cargo.toml
 delete mode 100644 crates/treehouse-format/src/lib.rs
 delete mode 100644 crates/treehouse/Cargo.toml
 rename {crates/treehouse/src => src}/cli.rs (100%)
 rename {crates/treehouse/src => src}/cli/fix.rs (99%)
 rename {crates/treehouse/src => src}/cli/serve.rs (100%)
 rename {crates/treehouse/src => src}/cli/serve/live_reload.rs (100%)
 rename {crates/treehouse/src => src}/cli/serve/picture_upload.rs (100%)
 rename {crates/treehouse/src => src}/cli/wc.rs (97%)
 rename {crates/treehouse/src => src}/config.rs (100%)
 rename {crates/treehouse/src => src}/dirs.rs (100%)
 rename {crates/treehouse/src => src}/fun.rs (100%)
 rename {crates/treehouse/src => src}/fun/seasons.rs (100%)
 rename {crates/treehouse/src => src}/generate.rs (100%)
 rename {crates/treehouse/src => src}/generate/atom.rs (100%)
 rename {crates/treehouse/src => src}/generate/dir_helper.rs (100%)
 rename {crates/treehouse/src => src}/generate/include_static_helper.rs (100%)
 rename {crates/treehouse/src => src}/generate/simple_template.rs (100%)
 rename {crates/treehouse/src => src}/generate/tree.rs (100%)
 rename {crates/treehouse/src => src}/history.rs (100%)
 rename {crates/treehouse/src => src}/html.rs (100%)
 rename {crates/treehouse/src => src}/html/breadcrumbs.rs (100%)
 rename {crates/treehouse/src => src}/html/djot.rs (100%)
 rename {crates/treehouse/src => src}/html/highlight.rs (100%)
 rename {crates/treehouse/src => src}/html/highlight/compiled.rs (100%)
 rename {crates/treehouse/src => src}/html/highlight/tokenize.rs (100%)
 rename {crates/treehouse/src => src}/html/navmap.rs (100%)
 rename {crates/treehouse/src => src}/html/tree.rs (99%)
 rename {crates/treehouse/src => src}/import_map.rs (100%)
 rename {crates/treehouse/src => src}/lib.rs (100%)
 rename {crates/treehouse/src => src}/main.rs (100%)
 rename {crates/treehouse/src => src}/parse.rs (85%)
 rename {crates/treehouse/src => src}/paths.rs (100%)
 rename {crates/treehouse/src => src}/sources.rs (100%)
 rename {crates/treehouse/src => src}/state.rs (100%)
 rename {crates/treehouse/src => src}/tree.rs (94%)
 rename {crates/treehouse-format/src => src/tree}/ast.rs (99%)
 rename {crates/treehouse/src => src}/tree/attributes.rs (100%)
 create mode 100644 src/tree/lib.rs
 rename {crates/treehouse/src => src}/tree/mini_template.rs (100%)
 rename {crates/treehouse-format/src => src/tree}/pull.rs (99%)
 rename {crates/treehouse/src => src}/vfs.rs (100%)
 rename {crates/treehouse/src => src}/vfs/anchored.rs (100%)
 rename {crates/treehouse/src => src}/vfs/asynch.rs (100%)
 rename {crates/treehouse/src => src}/vfs/cd.rs (100%)
 rename {crates/treehouse/src => src}/vfs/content_cache.rs (100%)
 rename {crates/treehouse/src => src}/vfs/content_version_cache.rs (100%)
 rename {crates/treehouse/src => src}/vfs/edit.rs (100%)
 rename {crates/treehouse/src => src}/vfs/file.rs (100%)
 rename {crates/treehouse/src => src}/vfs/html_canonicalize.rs (100%)
 rename {crates/treehouse/src => src}/vfs/image_size_cache.rs (100%)
 rename {crates/treehouse/src => src}/vfs/mem_dir.rs (100%)
 rename {crates/treehouse/src => src}/vfs/overlay.rs (100%)
 rename {crates/treehouse/src => src}/vfs/path.rs (100%)
 rename {crates/treehouse/src => src}/vfs/physical.rs (100%)
 create mode 100644 template/_doc.hbs
 rename {crates/treehouse/tests => tests}/it/main.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs/cd.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs/file.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs/mount_points.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs/physical.rs (100%)
 rename {crates/treehouse/tests => tests}/it/vfs_physical/test.txt (100%)

diff --git a/Cargo.lock b/Cargo.lock
index 5f8e6a8..e89722b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -724,7 +724,7 @@ dependencies = [
  "pest_derive",
  "serde",
  "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -1409,7 +1409,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879952a81a83930934cbf1786752d6dedc3b1f29e8f8fb2ad1d0a36f377cf442"
 dependencies = [
  "memchr",
- "thiserror",
+ "thiserror 1.0.69",
  "ucd-trie",
 ]
 
@@ -1599,7 +1599,7 @@ dependencies = [
  "rand_chacha",
  "simd_helpers",
  "system-deps",
- "thiserror",
+ "thiserror 1.0.69",
  "v_frame",
  "wasm-bindgen",
 ]
@@ -1931,7 +1931,16 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
+dependencies = [
+ "thiserror-impl 2.0.12",
 ]
 
 [[package]]
@@ -1945,6 +1954,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.1.8"
@@ -2176,24 +2196,17 @@ dependencies = [
  "regex",
  "serde",
  "serde_json",
+ "thiserror 2.0.12",
  "tokio",
  "toml_edit 0.19.15",
  "tracing",
  "tracing-chrome",
  "tracing-subscriber",
- "treehouse-format",
  "ulid",
  "webp",
  "xmlparser",
 ]
 
-[[package]]
-name = "treehouse-format"
-version = "0.1.0"
-dependencies = [
- "thiserror",
-]
-
 [[package]]
 name = "typenum"
 version = "1.17.0"
diff --git a/Cargo.toml b/Cargo.toml
index 9c407e9..97f0b1b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,11 +1,37 @@
-[workspace]
-members = ["crates/*"]
-resolver = "2"
+[package]
+name = "treehouse"
+version = "0.1.0"
+edition = "2021"
 
-[workspace.dependencies]
+[dependencies]
+anyhow = "1.0.75"
+axum = { version = "0.7.9", features = ["macros"] }
+axum-macros = "0.4.2"
+base64 = "0.21.7"
+blake3 = "1.5.3"
+chrono = { version = "0.4.35", features = ["serde"] }
+clap = { version = "4.3.22", features = ["derive"] }
+codespan-reporting = "0.11.1"
+dashmap = "6.1.0"
+git2 = { version = "0.19.0", default-features = false, features = ["vendored-libgit2"] }
+handlebars = "4.3.7"
+image = "0.25.5"
+indexmap = { version = "2.2.6", features = ["serde"] }
+jotdown = { version = "0.4.1", default-features = false }
+rand = "0.8.5"
+rayon = "1.10.0"
+regex = "1.10.3"
+serde = { version = "1.0.183", features = ["derive"] }
+serde_json = "1.0.105"
+thiserror = "2.0.12"
+tokio = { version = "1.32.0", features = ["full"] }
+toml_edit = { version = "0.19.14", features = ["serde"] }
 tracing = "0.1.40"
-
-treehouse-format = { path = "crates/treehouse-format" }
+tracing-chrome = "0.7.2"
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+ulid = "1.0.0"
+webp = "0.3.0"
+xmlparser = "0.13.6"
 
 [profile.dev]
 package.webp.opt-level = 3
diff --git a/crates/treehouse-format/Cargo.toml b/crates/treehouse-format/Cargo.toml
deleted file mode 100644
index 7db6b26..0000000
--- a/crates/treehouse-format/Cargo.toml
+++ /dev/null
@@ -1,7 +0,0 @@
-[package]
-name = "treehouse-format"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-thiserror = "1.0.47"
diff --git a/crates/treehouse-format/src/lib.rs b/crates/treehouse-format/src/lib.rs
deleted file mode 100644
index 6afdf89..0000000
--- a/crates/treehouse-format/src/lib.rs
+++ /dev/null
@@ -1,32 +0,0 @@
-use std::ops::Range;
-
-pub mod ast;
-pub mod pull;
-
-#[derive(Debug, thiserror::Error, Clone, PartialEq, Eq)]
-pub enum ParseErrorKind {
-    #[error("branch kind (`+` or `-`) expected")]
-    BranchKindExpected,
-
-    #[error("root branches must not be indented")]
-    RootIndentLevel,
-
-    #[error("at least {expected} spaces of indentation were expected, but got {got}")]
-    InconsistentIndentation { got: usize, expected: usize },
-
-    #[error("unterminated code block")]
-    UnterminatedCodeBlock,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, thiserror::Error)]
-#[error("{range:?}: {kind}")]
-pub struct ParseError {
-    pub kind: ParseErrorKind,
-    pub range: Range<usize>,
-}
-
-impl ParseErrorKind {
-    pub fn at(self, range: Range<usize>) -> ParseError {
-        ParseError { kind: self, range }
-    }
-}
diff --git a/crates/treehouse/Cargo.toml b/crates/treehouse/Cargo.toml
deleted file mode 100644
index 2198fdf..0000000
--- a/crates/treehouse/Cargo.toml
+++ /dev/null
@@ -1,36 +0,0 @@
-[package]
-name = "treehouse"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-
-treehouse-format = { workspace = true }
-
-anyhow = "1.0.75"
-axum = { version = "0.7.9", features = ["macros"] }
-axum-macros = "0.4.2"
-base64 = "0.21.7"
-blake3 = "1.5.3"
-chrono = { version = "0.4.35", features = ["serde"] }
-clap = { version = "4.3.22", features = ["derive"] }
-codespan-reporting = "0.11.1"
-dashmap = "6.1.0"
-git2 = { version = "0.19.0", default-features = false, features = ["vendored-libgit2"] }
-handlebars = "4.3.7"
-image = "0.25.5"
-indexmap = { version = "2.2.6", features = ["serde"] }
-jotdown = { version = "0.4.1", default-features = false }
-rand = "0.8.5"
-rayon = "1.10.0"
-regex = "1.10.3"
-serde = { version = "1.0.183", features = ["derive"] }
-serde_json = "1.0.105"
-tokio = { version = "1.32.0", features = ["full"] }
-toml_edit = { version = "0.19.14", features = ["serde"] }
-tracing.workspace = true
-tracing-chrome = "0.7.2"
-tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
-ulid = "1.0.0"
-webp = "0.3.0"
-xmlparser = "0.13.6"
diff --git a/crates/treehouse/src/cli.rs b/src/cli.rs
similarity index 100%
rename from crates/treehouse/src/cli.rs
rename to src/cli.rs
diff --git a/crates/treehouse/src/cli/fix.rs b/src/cli/fix.rs
similarity index 99%
rename from crates/treehouse/src/cli/fix.rs
rename to src/cli/fix.rs
index b5e1342..6e64cc0 100644
--- a/crates/treehouse/src/cli/fix.rs
+++ b/src/cli/fix.rs
@@ -3,11 +3,11 @@ use std::ops::{ControlFlow, Range};
 use anyhow::{anyhow, Context};
 use codespan_reporting::diagnostic::Diagnostic;
 use tracing::{error, info};
-use treehouse_format::ast::Branch;
 
 use crate::{
     parse::{self, parse_toml_with_diagnostics, parse_tree_with_diagnostics},
     state::{report_diagnostics, FileId, Source, Treehouse},
+    tree::ast::Branch,
     vfs::{self, Content, Dir, Edit, EditPath, VPath},
 };
 
diff --git a/crates/treehouse/src/cli/serve.rs b/src/cli/serve.rs
similarity index 100%
rename from crates/treehouse/src/cli/serve.rs
rename to src/cli/serve.rs
diff --git a/crates/treehouse/src/cli/serve/live_reload.rs b/src/cli/serve/live_reload.rs
similarity index 100%
rename from crates/treehouse/src/cli/serve/live_reload.rs
rename to src/cli/serve/live_reload.rs
diff --git a/crates/treehouse/src/cli/serve/picture_upload.rs b/src/cli/serve/picture_upload.rs
similarity index 100%
rename from crates/treehouse/src/cli/serve/picture_upload.rs
rename to src/cli/serve/picture_upload.rs
diff --git a/crates/treehouse/src/cli/wc.rs b/src/cli/wc.rs
similarity index 97%
rename from crates/treehouse/src/cli/wc.rs
rename to src/cli/wc.rs
index b210225..7028dc3 100644
--- a/crates/treehouse/src/cli/wc.rs
+++ b/src/cli/wc.rs
@@ -1,10 +1,9 @@
 use std::ops::ControlFlow;
 
-use treehouse_format::ast::{Branch, Roots};
-
 use crate::{
     parse::parse_tree_with_diagnostics,
     state::{report_diagnostics, Source, Treehouse},
+    tree::ast::{Branch, Roots},
     vfs::{self, Content, Dir, VPath},
 };
 
diff --git a/crates/treehouse/src/config.rs b/src/config.rs
similarity index 100%
rename from crates/treehouse/src/config.rs
rename to src/config.rs
diff --git a/crates/treehouse/src/dirs.rs b/src/dirs.rs
similarity index 100%
rename from crates/treehouse/src/dirs.rs
rename to src/dirs.rs
diff --git a/crates/treehouse/src/fun.rs b/src/fun.rs
similarity index 100%
rename from crates/treehouse/src/fun.rs
rename to src/fun.rs
diff --git a/crates/treehouse/src/fun/seasons.rs b/src/fun/seasons.rs
similarity index 100%
rename from crates/treehouse/src/fun/seasons.rs
rename to src/fun/seasons.rs
diff --git a/crates/treehouse/src/generate.rs b/src/generate.rs
similarity index 100%
rename from crates/treehouse/src/generate.rs
rename to src/generate.rs
diff --git a/crates/treehouse/src/generate/atom.rs b/src/generate/atom.rs
similarity index 100%
rename from crates/treehouse/src/generate/atom.rs
rename to src/generate/atom.rs
diff --git a/crates/treehouse/src/generate/dir_helper.rs b/src/generate/dir_helper.rs
similarity index 100%
rename from crates/treehouse/src/generate/dir_helper.rs
rename to src/generate/dir_helper.rs
diff --git a/crates/treehouse/src/generate/include_static_helper.rs b/src/generate/include_static_helper.rs
similarity index 100%
rename from crates/treehouse/src/generate/include_static_helper.rs
rename to src/generate/include_static_helper.rs
diff --git a/crates/treehouse/src/generate/simple_template.rs b/src/generate/simple_template.rs
similarity index 100%
rename from crates/treehouse/src/generate/simple_template.rs
rename to src/generate/simple_template.rs
diff --git a/crates/treehouse/src/generate/tree.rs b/src/generate/tree.rs
similarity index 100%
rename from crates/treehouse/src/generate/tree.rs
rename to src/generate/tree.rs
diff --git a/crates/treehouse/src/history.rs b/src/history.rs
similarity index 100%
rename from crates/treehouse/src/history.rs
rename to src/history.rs
diff --git a/crates/treehouse/src/html.rs b/src/html.rs
similarity index 100%
rename from crates/treehouse/src/html.rs
rename to src/html.rs
diff --git a/crates/treehouse/src/html/breadcrumbs.rs b/src/html/breadcrumbs.rs
similarity index 100%
rename from crates/treehouse/src/html/breadcrumbs.rs
rename to src/html/breadcrumbs.rs
diff --git a/crates/treehouse/src/html/djot.rs b/src/html/djot.rs
similarity index 100%
rename from crates/treehouse/src/html/djot.rs
rename to src/html/djot.rs
diff --git a/crates/treehouse/src/html/highlight.rs b/src/html/highlight.rs
similarity index 100%
rename from crates/treehouse/src/html/highlight.rs
rename to src/html/highlight.rs
diff --git a/crates/treehouse/src/html/highlight/compiled.rs b/src/html/highlight/compiled.rs
similarity index 100%
rename from crates/treehouse/src/html/highlight/compiled.rs
rename to src/html/highlight/compiled.rs
diff --git a/crates/treehouse/src/html/highlight/tokenize.rs b/src/html/highlight/tokenize.rs
similarity index 100%
rename from crates/treehouse/src/html/highlight/tokenize.rs
rename to src/html/highlight/tokenize.rs
diff --git a/crates/treehouse/src/html/navmap.rs b/src/html/navmap.rs
similarity index 100%
rename from crates/treehouse/src/html/navmap.rs
rename to src/html/navmap.rs
diff --git a/crates/treehouse/src/html/tree.rs b/src/html/tree.rs
similarity index 99%
rename from crates/treehouse/src/html/tree.rs
rename to src/html/tree.rs
index 7453bb5..a574e39 100644
--- a/crates/treehouse/src/html/tree.rs
+++ b/src/html/tree.rs
@@ -1,7 +1,6 @@
 use std::fmt::Write;
 
 use chrono::{DateTime, Utc};
-use treehouse_format::pull::BranchKind;
 
 use crate::{
     config::Config,
@@ -11,7 +10,9 @@ use crate::{
     state::{FileId, Treehouse},
     tree::{
         attributes::{Content, Stage, Visibility},
-        mini_template, SemaBranchId,
+        mini_template,
+        pull::BranchKind,
+        SemaBranchId,
     },
     vfs::{self, VPath, VPathBuf},
 };
diff --git a/crates/treehouse/src/import_map.rs b/src/import_map.rs
similarity index 100%
rename from crates/treehouse/src/import_map.rs
rename to src/import_map.rs
diff --git a/crates/treehouse/src/lib.rs b/src/lib.rs
similarity index 100%
rename from crates/treehouse/src/lib.rs
rename to src/lib.rs
diff --git a/crates/treehouse/src/main.rs b/src/main.rs
similarity index 100%
rename from crates/treehouse/src/main.rs
rename to src/main.rs
diff --git a/crates/treehouse/src/parse.rs b/src/parse.rs
similarity index 85%
rename from crates/treehouse/src/parse.rs
rename to src/parse.rs
index 56fe2f4..e24bcbe 100644
--- a/crates/treehouse/src/parse.rs
+++ b/src/parse.rs
@@ -2,9 +2,11 @@ use std::{ops::Range, str::FromStr};
 
 use codespan_reporting::diagnostic::{Diagnostic, Label, LabelStyle, Severity};
 use tracing::instrument;
-use treehouse_format::ast::Roots;
 
-use crate::state::{toml_error_to_diagnostic, FileId, TomlError, Treehouse};
+use crate::{
+    state::{toml_error_to_diagnostic, FileId, TomlError, Treehouse},
+    tree::{self, ast::Roots},
+};
 
 pub struct ErrorsEmitted;
 
@@ -13,7 +15,7 @@ pub fn parse_tree_with_diagnostics(
     file_id: FileId,
     input: &str,
 ) -> Result<Roots, Vec<Diagnostic<FileId>>> {
-    Roots::parse(&mut treehouse_format::pull::Parser { input, position: 0 }).map_err(|error| {
+    Roots::parse(&mut tree::pull::Parser { input, position: 0 }).map_err(|error| {
         vec![Diagnostic {
             severity: Severity::Error,
             code: Some("tree".into()),
diff --git a/crates/treehouse/src/paths.rs b/src/paths.rs
similarity index 100%
rename from crates/treehouse/src/paths.rs
rename to src/paths.rs
diff --git a/crates/treehouse/src/sources.rs b/src/sources.rs
similarity index 100%
rename from crates/treehouse/src/sources.rs
rename to src/sources.rs
diff --git a/crates/treehouse/src/state.rs b/src/state.rs
similarity index 100%
rename from crates/treehouse/src/state.rs
rename to src/state.rs
diff --git a/crates/treehouse/src/tree.rs b/src/tree.rs
similarity index 94%
rename from crates/treehouse/src/tree.rs
rename to src/tree.rs
index 6c3bd9d..b922e32 100644
--- a/crates/treehouse/src/tree.rs
+++ b/src/tree.rs
@@ -1,20 +1,22 @@
+pub mod ast;
 pub mod attributes;
 pub mod mini_template;
+pub mod pull;
 
 use std::ops::Range;
 
 use attributes::Timestamps;
 use codespan_reporting::diagnostic::{Diagnostic, Label, LabelStyle, Severity};
 use tracing::instrument;
-use treehouse_format::{
-    ast::{Branch, Roots},
-    pull::BranchKind,
-};
 
 use crate::{
     config::Config,
     state::{toml_error_to_diagnostic, FileId, Source, TomlError, Treehouse},
-    tree::attributes::{Attributes, Content},
+    tree::{
+        ast::{Branch, Roots},
+        attributes::{Attributes, Content},
+        pull::BranchKind,
+    },
 };
 
 use self::attributes::RootAttributes;
@@ -409,3 +411,31 @@ impl SemaBranch {
         attributes
     }
 }
+
+#[derive(Debug, thiserror::Error, Clone, PartialEq, Eq)]
+pub enum ParseErrorKind {
+    #[error("branch kind (`+` or `-`) expected")]
+    BranchKindExpected,
+
+    #[error("root branches must not be indented")]
+    RootIndentLevel,
+
+    #[error("at least {expected} spaces of indentation were expected, but got {got}")]
+    InconsistentIndentation { got: usize, expected: usize },
+
+    #[error("unterminated code block")]
+    UnterminatedCodeBlock,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, thiserror::Error)]
+#[error("{range:?}: {kind}")]
+pub struct ParseError {
+    pub kind: ParseErrorKind,
+    pub range: Range<usize>,
+}
+
+impl ParseErrorKind {
+    pub fn at(self, range: Range<usize>) -> ParseError {
+        ParseError { kind: self, range }
+    }
+}
diff --git a/crates/treehouse-format/src/ast.rs b/src/tree/ast.rs
similarity index 99%
rename from crates/treehouse-format/src/ast.rs
rename to src/tree/ast.rs
index e8e4915..5c97879 100644
--- a/crates/treehouse-format/src/ast.rs
+++ b/src/tree/ast.rs
@@ -1,6 +1,6 @@
 use std::ops::Range;
 
-use crate::{
+use super::{
     pull::{Attributes, BranchEvent, BranchKind, Parser},
     ParseError, ParseErrorKind,
 };
diff --git a/crates/treehouse/src/tree/attributes.rs b/src/tree/attributes.rs
similarity index 100%
rename from crates/treehouse/src/tree/attributes.rs
rename to src/tree/attributes.rs
diff --git a/src/tree/lib.rs b/src/tree/lib.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/tree/lib.rs
@@ -0,0 +1 @@
+
diff --git a/crates/treehouse/src/tree/mini_template.rs b/src/tree/mini_template.rs
similarity index 100%
rename from crates/treehouse/src/tree/mini_template.rs
rename to src/tree/mini_template.rs
diff --git a/crates/treehouse-format/src/pull.rs b/src/tree/pull.rs
similarity index 99%
rename from crates/treehouse-format/src/pull.rs
rename to src/tree/pull.rs
index 964ca4e..c1e4fd6 100644
--- a/crates/treehouse-format/src/pull.rs
+++ b/src/tree/pull.rs
@@ -1,6 +1,6 @@
 use std::{convert::identity, ops::Range};
 
-use crate::{ParseError, ParseErrorKind};
+use super::{ParseError, ParseErrorKind};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum BranchKind {
diff --git a/crates/treehouse/src/vfs.rs b/src/vfs.rs
similarity index 100%
rename from crates/treehouse/src/vfs.rs
rename to src/vfs.rs
diff --git a/crates/treehouse/src/vfs/anchored.rs b/src/vfs/anchored.rs
similarity index 100%
rename from crates/treehouse/src/vfs/anchored.rs
rename to src/vfs/anchored.rs
diff --git a/crates/treehouse/src/vfs/asynch.rs b/src/vfs/asynch.rs
similarity index 100%
rename from crates/treehouse/src/vfs/asynch.rs
rename to src/vfs/asynch.rs
diff --git a/crates/treehouse/src/vfs/cd.rs b/src/vfs/cd.rs
similarity index 100%
rename from crates/treehouse/src/vfs/cd.rs
rename to src/vfs/cd.rs
diff --git a/crates/treehouse/src/vfs/content_cache.rs b/src/vfs/content_cache.rs
similarity index 100%
rename from crates/treehouse/src/vfs/content_cache.rs
rename to src/vfs/content_cache.rs
diff --git a/crates/treehouse/src/vfs/content_version_cache.rs b/src/vfs/content_version_cache.rs
similarity index 100%
rename from crates/treehouse/src/vfs/content_version_cache.rs
rename to src/vfs/content_version_cache.rs
diff --git a/crates/treehouse/src/vfs/edit.rs b/src/vfs/edit.rs
similarity index 100%
rename from crates/treehouse/src/vfs/edit.rs
rename to src/vfs/edit.rs
diff --git a/crates/treehouse/src/vfs/file.rs b/src/vfs/file.rs
similarity index 100%
rename from crates/treehouse/src/vfs/file.rs
rename to src/vfs/file.rs
diff --git a/crates/treehouse/src/vfs/html_canonicalize.rs b/src/vfs/html_canonicalize.rs
similarity index 100%
rename from crates/treehouse/src/vfs/html_canonicalize.rs
rename to src/vfs/html_canonicalize.rs
diff --git a/crates/treehouse/src/vfs/image_size_cache.rs b/src/vfs/image_size_cache.rs
similarity index 100%
rename from crates/treehouse/src/vfs/image_size_cache.rs
rename to src/vfs/image_size_cache.rs
diff --git a/crates/treehouse/src/vfs/mem_dir.rs b/src/vfs/mem_dir.rs
similarity index 100%
rename from crates/treehouse/src/vfs/mem_dir.rs
rename to src/vfs/mem_dir.rs
diff --git a/crates/treehouse/src/vfs/overlay.rs b/src/vfs/overlay.rs
similarity index 100%
rename from crates/treehouse/src/vfs/overlay.rs
rename to src/vfs/overlay.rs
diff --git a/crates/treehouse/src/vfs/path.rs b/src/vfs/path.rs
similarity index 100%
rename from crates/treehouse/src/vfs/path.rs
rename to src/vfs/path.rs
diff --git a/crates/treehouse/src/vfs/physical.rs b/src/vfs/physical.rs
similarity index 100%
rename from crates/treehouse/src/vfs/physical.rs
rename to src/vfs/physical.rs
diff --git a/static/css/main.css b/static/css/main.css
index 79a0d53..2b4b5e0 100644
--- a/static/css/main.css
+++ b/static/css/main.css
@@ -147,7 +147,7 @@ html {
 }
 
 body {
-    font-size: 1.4rem;
+    font-size: 1.6rem;
 }
 
 pre,
@@ -183,9 +183,10 @@ input {
         "slnt" var(--recursive-slnt),
         "CRSV" var(--recursive-crsv);
 
-    font-feature-settings: var(--recursive-simplified-f),
-        var(--recursive-simplified-g), var(--recursive-simplified-l),
-        var(--recursive-simplified-r), var(--recursive-no-serif-L-Z);
+    font-feature-settings:
+        var(--recursive-simplified-f), var(--recursive-simplified-g),
+        var(--recursive-simplified-l), var(--recursive-simplified-r),
+        var(--recursive-no-serif-L-Z);
 }
 
 h1 {
diff --git a/template/_doc.hbs b/template/_doc.hbs
new file mode 100644
index 0000000..132c397
--- /dev/null
+++ b/template/_doc.hbs
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+
+<html lang="en-US" prefix="og: https://ogp.me/ns#">
+
+<head>
+    {{> components/_head.hbs }}
+</head>
+
+<body>
+    <!-- Empty span to push noscript over to the next grid cell.
+         Browsers turn <noscript> tags into <span style="display: inline !important;"> with no
+         additional classes, and we can't easily select that in CSS. -->
+    <span></span>
+    {{> components/_noscript.hbs }}
+
+    {{> components/_nav.hbs }}
+    {{> components/_header.hbs }}
+
+    {{!--
+    NOTE: ~ because components/_tree.hbs must not include any extra indentation, because it may
+    contain pre elements which shouldn't be indented.
+    --}}
+    {{~> components/_tree.hbs }}
+
+    {{!-- For all pages except the one linked from the footer, include the footer icon. --}}
+    {{#if (ne page.tree_path "treehouse")}}
+    {{> components/_footer.hbs }}
+    {{/if}}
+
+    <th-overlays></th-overlays>
+    <th-command-line></th-command-line>
+</body>
+
+</html>
+
diff --git a/crates/treehouse/tests/it/main.rs b/tests/it/main.rs
similarity index 100%
rename from crates/treehouse/tests/it/main.rs
rename to tests/it/main.rs
diff --git a/crates/treehouse/tests/it/vfs.rs b/tests/it/vfs.rs
similarity index 100%
rename from crates/treehouse/tests/it/vfs.rs
rename to tests/it/vfs.rs
diff --git a/crates/treehouse/tests/it/vfs/cd.rs b/tests/it/vfs/cd.rs
similarity index 100%
rename from crates/treehouse/tests/it/vfs/cd.rs
rename to tests/it/vfs/cd.rs
diff --git a/crates/treehouse/tests/it/vfs/file.rs b/tests/it/vfs/file.rs
similarity index 100%
rename from crates/treehouse/tests/it/vfs/file.rs
rename to tests/it/vfs/file.rs
diff --git a/crates/treehouse/tests/it/vfs/mount_points.rs b/tests/it/vfs/mount_points.rs
similarity index 100%
rename from crates/treehouse/tests/it/vfs/mount_points.rs
rename to tests/it/vfs/mount_points.rs
diff --git a/crates/treehouse/tests/it/vfs/physical.rs b/tests/it/vfs/physical.rs
similarity index 100%
rename from crates/treehouse/tests/it/vfs/physical.rs
rename to tests/it/vfs/physical.rs
diff --git a/crates/treehouse/tests/it/vfs_physical/test.txt b/tests/it/vfs_physical/test.txt
similarity index 100%
rename from crates/treehouse/tests/it/vfs_physical/test.txt
rename to tests/it/vfs_physical/test.txt