Builtins are chips that link to a glossary generated from the registry, and the virtual filesystem is drawn as a tree

#word draws a builtin as a chip on the tag's ground over a rule (Look and
Exec in acme's look green and exec red), a <code class="word"> in HTML,
and links it to its entry in a new Builtins chapter wherever that
chapter is in the same output (the book, the site). The chapter is
drawn from docs/typ/builtins-tty.json and builtins-gui.json, which
`zig build builtins-json -Dplatform=tty|gui` writes from the registry
and the Help rows (src/builtins_json.zig, tools/gen_builtins_json.zig;
summaryOf in ninep/ctl.zig is now pub); style.typ merges them, marking
the window-only words. The doc steps refresh their build's file first,
and each build's unit-test fails when its file is stale. Everyday words
first (`everyday` in style.typ), then groups by leader prefix as Help
has them, then settings, the words with no path, debugging and
internals, and last an A-Z index of every word. `zig build book` joins
the doc steps.

#fstree draws a directory tree with its connectors, a description
column and links to the sections that document each file; reference.typ
draws the served tree with it, each pane, pty and column file on its
own line, and a test in config.zig checks it against ninep/tree.zig's
files both ways. The cheatsheet has a two-level version. On the site
the tree reads as `tree` text in w3m and wraps descriptions under the
names on a phone.

The site's tutor draws its B1, B2, B3 and 1-2 chords as mouse glyphs;
the landing credits Plan 9 and acme, as does the book's title page;
install.typ no longer lists the mirrors (the footer does).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index 38373266..310a4b56 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -46,6 +46,8 @@ pub const Region = @import("surface.zig").Region;
 pub const Chrome = @import("surface.zig").Chrome;
 pub const MAX_REGIONS = @import("surface.zig").MAX_REGIONS;
 pub const builtins = @import("builtins.zig");
+/// Every builtin as JSON, for the docs (tools/gen_builtins_json.zig).
+pub const builtins_json = @import("builtins_json.zig");
 const limits = memory.limits;
 const selection_pipe = @import("selection_pipe.zig");
 pub const config = @import("config.zig");
@@ -477,6 +479,7 @@ pub const Loc = struct {
 
 test {
     _ = @import("tagline.zig");
+    _ = @import("builtins_json.zig");
     _ = @import("exec.zig");
     _ = @import("look.zig");
     _ = @import("sam_edit.zig");