Each <version>.txt file records how the API of the published @opentui/* packages and of the C ABI in packages/native/include/opentui.h changed in that release. The documentation site reads these files to show when each feature was added, changed, deprecated, or removed.

A file exists for every stable release from the oldest file on. A release without API changes has a file with only the header.

Format

base 0.5.14
- @opentui/core: method DiffRenderable.destroyRecursively(): void
+ @opentui/core: protected method DiffRenderable.destroySelf(): void
- @opentui/solid: method SlotRenderable.getSlotChild(parent: BaseRenderable): TextSlotRenderable | LayoutSlotRenderable
+ @opentui/solid: method SlotRenderable.getSlotChild(parent: BaseRenderable): LayoutSlotRenderable | TextSlotRenderable

The first line names the release that the file is relative to: base <version>. Usually the base is the previous release. A patch of an older line names the release it was made from. The oldest file is a snapshot: base none, and every feature of its release as a + line.

Each other line adds (+) or removes (-) one feature. A changed signature is a - line and a + line with the same key. The API of a release is the API of its base, without the - lines, with the + lines.

Lines are sorted by key, then - before +, then by text. A key is <module>: <kind> <name>.

Features

<module>: [<modifier> ...]<kind> <name><signature>

<module> is the npm specifier of an entry point, such as @opentui/core or @opentui/core/testing. Each subpath of a package's exports map with a types target is an entry point. A feature exported by two entry points has a line for each. The module of the C ABI is opentui.h.
<modifier> is deprecated (JSDoc @deprecated), static, protected, abstract, or readonly, in that order.
<kind> is class, interface, type, function, const, let, enum, enum-member, namespace, constructor, method, property, call, construct, index, or reexport. The C ABI also uses struct and field.
<name> is the export name. A member name includes its owner: CliRenderer.suspend, Yoga.Node.create. A constructor, call, construct, or index signature uses the owner's name. A default export is default.
<signature> is the declaration syntax after the name, from the published .d.ts files. Comments are removed, whitespace is collapsed, and import("…").X is written as X.

Members are the own members of a class or interface. Inherited members are not repeated; the extends clause is on the class line. Private, #private, and @internal members are left out. So are public members whose name starts with _. Protected members, including _ names, are API because users subclass renderables. Getters and setters are properties; a getter without a setter is readonly. Each overload has its own line.

An export * as X of a module in the package records namespace X and its members as X.member. An export from another package records only the export: namespace THREE from "three", reexport createElement from "react", or reexport * from "react". A renamed export from another package ends with as <original name>.

The C ABI

opentui.h: function ot_scene_move_node(ot_context *, const ot_handle *node, const ot_handle *parent, uint32_t index): ot_status
opentui.h: type ot_status = int32_t
opentui.h: type ot_scene_measure_callback = void (*)(uint64_t context_id, uint32_t slot, …, float *out_size)
opentui.h: type ot_context = struct ot_context
opentui.h: struct ot_handle
opentui.h: field ot_handle.slot: uint32_t, offset 8
opentui.h: const OT_INVALID_ARGUMENT = -1

The lines of opentui.h record each declaration whose name starts with ot_ or OT_:

A function is function, with its parameters as the header declares them and its return type after a colon.
A typedef of a function pointer, an integer, or an incomplete struct is type, with the C type after =.
A struct is struct, and each of its fields is field <struct>.<field>: <type>, offset <bytes>. A field that moves is a change, so a line shows a layout change even when the field keeps its name and type.
An object-like macro is const, with its integer value.

Types keep the header's spelling, with whitespace collapsed. The field offsets and macro values come from packages/core/src/native-abi.generated.ts, which bun run check:abi in packages/core derives from the header with the C compiler.

A release's C ABI is its commit's header: the C ABI is used from a source checkout, not from an npm package.

Commands

Run these from the repository root.

bun packages/web/scripts/api.ts release <version> writes api/<version>.txt: the difference between the latest file's API and the API of the source tree. scripts/release.ts runs it in the release commit. It does not overwrite a file with different contents. Pass --base <version> for a patch of an older line.
bun packages/web/scripts/api.ts verify <version> compares the API that the files record for a release with its packages on npm. The release workflow runs it after npm serves the release. The C ABI is not on npm, so it is left out.
bun packages/web/scripts/api.ts diff prints the file that a release of the source tree would add.
bun packages/web/scripts/api.ts current prints every feature of the source tree.
bun packages/web/scripts/api.ts check validates the files.
bun packages/web/scripts/api.ts backfill [--from <version>] [--to <version>] writes the files of published releases from their npm tarballs and the header at their tags, from the oldest file on. It rewrites only files that changed. Run it after a change to the extractor. A release without a tag has no C ABI.
bun packages/web/scripts/api.ts squash <version> starts the history at a release: its file becomes a snapshot, and the files of older releases go. The API that the files record for the kept releases stays the same; the site stops listing the older releases and the versions that added their features. Run it when nobody uses the older lines.

The source commands run tsc declaration emit for each package into a temporary directory, with the exports map that the package's scripts/build.ts publishes. They do not run the package builds. The extractor reads those declarations in the same way as a tarball, so a source tree at a release tag gives the API of that release. They read the source tree's header for the C ABI.