ludic/tools/docgen
Orkuncakilkaya e4265f5fdb feat(lang): 27.1 - a state machine as data: @Machine(Record.field) on a registry of transitions
A registry marked `@Machine(Deer.mood)` is the transitions of a machine over that enum field of the
records a state's Table<Deer> holds. Its record has from and to (the enum's variants), on: string (an
action's name, "" for a transition the tick asks), guard: fn(Row<Deer>, reads...) -> bool and
enter: fn(Row<Deer>, reads...) -> void; the states are the enum's variants and the start is the
field's default. The rows are data (an .lres or defs), the names the studio already edits.

Written by the compiler (machines.ludic, machines_write.ludic): for each action an `on` names, a row
reducer in the registry's file (named ..__machine__DeerSteps, so it sits beside the program's own
row reducer on the same action, after it): the row's state, the first transition from it on that
action whose guard passes, the field set, enter run - guards and enters called by name. When a row
leaves a state on a guard alone, `state DeerStepsMachine` (the kept row view) and
deer_steps_tick(m: mut DeerStepsMachine, s: mut Herd, reads...), one transition a row a tick.
Nothing allocates.

The table is the whole machine: the field written anywhere else - an assignment, or a `machine`
block's become over it - is a type error (check_stmt.ludic, ck_machine_write). Guards and enters take
the row first, are the record's module's, keep a row reducer's rules (and may be handed the row);
a guard writes nothing through it. The graph is checked, each error at its row (in the .lres when
the rows are there): a state never reached from the start, a state with no way out, an `on` naming
no action or an action with no @Target, a self-transition with no guard, two ways out of a state on
one trigger behind an unguarded first. Also refused: @Machine off a registry, a field that is not a
plain enum with a default, a @Column field, no table (or two) of the record, a transitions record of
another shape, a machine outside its table's state's module.

ludic schema's code section gains `machines` (registry, record, field, enum, table, start, states,
actions, tick, module, at); ludic deps names a machine's reducer `reducer Deer in Herd.deer on Spook
(machine DeerSteps)`. vocab @Machine; docs annot-machine, kw-machine; LANGUAGE.md "A machine as
data"; examples actions/machine (+ deer_steps.lres) and ten rejects; test.ludic feat, reject and
schema cases (not run); changes/machines.md. Reseeded; bootstrap-cfree fixpoint holds (317642
lines); Maroon Lake's `ludic build --check` is clean against this tree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 16:37:37 +03:00
..
assets fix(docs): restore the token cards on the generated site 2026-09-05 14:41:10 +03:00
inventory.json feat(lang): 27.1 - a state machine as data: @Machine(Record.field) on a registry of transitions 2026-09-30 16:37:37 +03:00
README.md refactor(cli)!: split the contributor tool out of the ludic CLI 2026-09-05 23:15:12 +03:00

Ludic documentation generator

Generates the public documentation site (the pages branch) from a single source of truth, so the site can never drift from the language.

Source of truth

docs/
  language/<category>/<id>.md    one file per symbol — keyword, type, phase,
                                 builtin, namespace method, operator, annotation
  language/<category>/_section.md   section title + blurb + order
  language/colors/palette.json   the 221 named colors (generated by `ludic-dev docs-palette`)
  site/site.json                 landing-page messaging (hero, features, …)
  site/snippets/*.ludic          the code shown on the landing page (real programs)
tools/docgen/inventory.json      the authoritative symbol set the coverage guard checks

A symbol file

---
id: screen-fill_rectangle     # anchor + page name (screen-fill_rectangle.html)
name: Screen.fill_rectangle
category: screen
kind: namespace-method        # keyword|type|phase|namespace-method|builtin|annotation|operator
tokens: Screen.fill_rectangle # literal token(s) the highlighter matches & links
sig: Screen.fill_rectangle(x, y, width, height, color)
tip: Draw a solid, filled rectangle.     # one sentence — the hover-card summary
order: 1
ns: Screen                    # namespace-method only
member: fill_rectangle        # namespace-method only
related: screen-clear screen-draw_rectangle
---

Rich description — inline `<code>`/`backticks`, "model instance" language.

Parameters:                   # for anything that takes arguments
- `x` — the left edge, in pixels
- `color` — the fill color, e.g. a `Color.*` name

​```ludic
program Example { … descriptive-named, compilable … }
​```

What it produces

One page per symbol (<id>.html), a namespace overview page per namespace (ns-screen.html … ns-color.html), a searchable index (api.html, fuzzy search over every symbol), the landing page (index.html), the ludic-highlight.js highlighter (all its symbol tables, tips, per-item link targets, per-parameter anchors and hover-card data generated from the sources above), symbols.json, and .nojekyll.

In any code sample: keywords/types/builtins/annotations link to their page; Screen.fill_rectangle links Screen → the namespace page and fill_rectangle → the method page separately; a named argument like width: links to that parameter's anchor; Color.Charcoal links Color and Charcoal separately; hovering any token shows a summary card from the real API data.

Build & check

The generator and its guards are written in Ludic and run through x — there is no Python in the pipeline. assets/ (the CSS/HTML/JS templates) and inventory.json are the only inputs the tools here still read directly.

bin/ludic-dev docs-gen --out build/pages    # generate the whole site
bin/ludic-dev docs-check build/pages        # coverage + duplicate-token + link guard
bin/ludic-dev check-docs                    # parse every ```ludic doc fence

docs-check fails CI if any symbol in inventory.json lacks a page, if a token is documented on two pages, or if a highlighter link points at a missing page — so "every symbol is documented, autogenerated each time" is enforced. It needs a built bin/ludic (bootstrapped from the IR seed with clang alone).

Publish

.forgejo/workflows/docs.yml bootstraps the toolchain from the IR seed and runs ludic-dev docs-gen + ludic-dev docs-check on every push to main that touches docs/**, tools/docgen/** or tools/ludic-cli/**, and publishes the result to the pages branch root. index.html + .nojekyll always stay at the root.

Colors

palette.json and selfhost/backend/stdlib/emit_color.ludic are both generated by bin/ludic-dev docs-palette from a single palette table — the pal_add(...) rows in tools/ludic-cli/docgen.ludic. Edit the table there and regenerate; do not hand-edit the generated files.