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`bundleToSingleHtml` compiles `data-duration` into `data-end` (in `compileTimingAttrs`), then calls `validateHyperframeHtmlContract` against the compiled HTML. The linter's `deprecated_data_end` rule fired on the compiler's own consistent output — `<audio data-start="0" data-duration="18" data-end="18">` — because `diagnoseDerivedEnd` unconditionally emitted a `deprecated-end` diagnostic whenever both attributes were present, ignoring whether the derived value matched. Reporters routed this as "raw-source lint passes with 0 errors and 0 warnings, but `check --strict` still logs StaticGuard noise about data-end without data-duration." Field cluster: cli-feedback crons 61-68, n=25+ across darwin/arm64, darwin/x64, linux/x64, win32/x64, and versions 0.7.56 through 0.7.64. L3 reporter cite (ts=1784519869): "bundleToSingleHtml compiles data-duration into data-end, then validates the compiled HTML and reports its own generated data-end as deprecated." Fix: `diagnoseDerivedEnd` now stays silent when the paired `data-end` matches `data-start + data-duration` (within a 1ns epsilon to absorb IEEE-754 residuals like `0.1 + 0.2 = 0.30000000000000004`). Truly-legacy authoring shapes — `data-end` alone with no `data-duration`, or a `data-end` that disagrees with `data-duration` — still fire `deprecated_data_end`, with a refined message that names the drift on the conflicting variant. Facets covered: (a) validator treats compiler-derived `data-end` as legal when paired with `data-duration`, and (e) recognizes the compile-time rewrite site (`bundleToSingleHtml` → `compileHtml` → `compileTimingAttrs`). Facets (b) stderr gating, (c) terminal JSON verdict, and (d) audio-not- dropped are unblocked transitively — StaticGuard's `console.warn` is already gated on `!isValid` and never drops audio; the check command already emits JSON on every terminal path; so once the false-positive diagnostic stops firing on compiler output, the noisy stderr line and the misleading "check appears to fail" reporter framing both go away without further wiring. Co-Authored-By: Via <noreply@heygen.com>
@hyperframes/core
Types, parsers, generators, compiler, linter, runtime, and frame adapters for the Hyperframes video framework.
Install
npm install @hyperframes/core
Most users don't need to install core directly — the CLI, producer, and studio packages depend on it internally.
What's inside
| Module | Description |
|---|---|
| Types | TimelineElement, CompositionSpec, Asset, canvas dimensions, defaults |
| Parsers | parseHtml — extract timeline elements from HTML; parseGsapScript — parse GSAP animations |
| Generators | generateHyperframesHtml — produce valid Hyperframes HTML from a composition spec |
| Compiler | compileTimingAttrs — resolve data-start / data-duration into absolute times |
| Linter | lintHyperframeHtml — validate Hyperframes HTML (missing attributes, overlapping tracks, etc.) |
| Runtime | IIFE script injected into the browser — manages seek, media playback, and the window.__hf protocol |
| Frame Adapters | Pluggable animation drivers (GSAP, Lottie, CSS, or custom) |
Frame Adapters
A frame adapter tells the engine how to seek your animation to a specific frame:
import { createGSAPFrameAdapter } from "@hyperframes/core";
const adapter = createGSAPFrameAdapter({
getTimeline: () => gsap.timeline(),
compositionId: "my-video",
});
Implement FrameAdapter for custom animation runtimes:
import type { FrameAdapter } from "@hyperframes/core";
const myAdapter: FrameAdapter = {
id: "my-adapter",
getDurationFrames: () => 300,
seekFrame: (frame) => {
/* seek your animation */
},
};
Parsing and generating HTML
import { parseHtml, generateHyperframesHtml } from "@hyperframes/core";
const { elements, metadata } = parseHtml(htmlString);
const html = generateHyperframesHtml(spec);
Linting
import { lintHyperframeHtml } from "@hyperframes/core/lint";
const result = lintHyperframeHtml(htmlString);
// result.findings: { severity, message, elementId }[]
Documentation
Full documentation: hyperframes.heygen.com/packages/core
Related packages
@hyperframes/engine— rendering engine that drives the browser@hyperframes/producer— full render pipeline (capture + encode)hyperframes— CLI