heygen-com--hyperframes/skills/pr-to-video/references/code-vocabulary.md

Code vocabulary — the code-* animation blocks

PR videos run on two kinds of moving picture: code (the lines that changed) and behavior (what the change does at runtime). This file is the vocabulary for both — the code-* blocks for code beats, and the mechanism beat (an invented animated diagram, or a flowchart / data-chart) for behavior beats. A video that is all code reads flat; alternate the two (story-design plans the rhythm; see "Showing behavior" below).

For code beats the registry ships purpose-built code animation blocks that render a diff, a typed-on snippet, a morph, a highlight, a scroll, or a 3D/particle/dissolve reveal — far better than hand-built motion. Reach for one of these first for any code beat; fall back to hand-authored composition only when none fits.

• Step 4 (visual design): for each diff / before_after / code beat, name the block in the frame's scene (e.g. "the request() retry block, ~6 lines, code-diff"). One judgment call: which block.
• Step 5 (frame worker): install the named block and fill it with the real diff/snippet (below). The block is the frame's centerpiece, composited onto claude's navy Code Surface.

Install + use

Every block installs the same way (confirmed packages/cli/src/commands/add.ts):

npx hyperframes add <block-name>     # writes compositions/<block-name>.html

It is a self-contained sub-composition (inlined engine; a paused GSAP timeline the engine seeks per frame). Mount it in the frame as a sub-composition clip:

<div
  data-composition-id="code-diff"
  data-composition-src="compositions/code-diff.html"
  data-start="0"
  data-duration="6"
  data-track-index="1"
  data-width="1920"
  data-height="1080"
></div>

Customize by editing two globals in the installed HTML's inline <script>:

• window.__TOKENS — the code content, baked as Shiki tokens: { <seq>: { lang, theme, bg, fg, states: [ { code, tokens:[ {key, content, color, fontStyle} ] } ] } }. Replace code/tokens with the PR's real snippet(s). fontStyle is a bitmask (&1 italic, &2 bold). The blocks bake theme: "github-dark" independently of the code-snippet-* themes below.
• window.__BLOCK — selects the effect + timing: 2D { id, effect, seq, line?, duration }; WebGL { id, effect, seq, duration, seed }.

The timeline registers synchronously at window.__timelines[id]. All blocks are 1920×1080 and deterministic / seek-safe (no CSS transitions, no rAF, seeded randomness — never Math.random / Date.now).

The animation blocks

Block	What it does	Inputs of note	PR beat
code-diff	Unified diff inside an editor window: removed lines collapse in red, added lines expand in green, staggered. (6s)	__TOKENS.diff.states needs exactly 2 states (before, after) — the engine LCS-diffs them.	The diff hunk (before→after); literal add/remove semantics. The default PR block.
code-morph	One snippet transforms into another — shared tokens glide (FLIP), leavers fade out, enterers fade in. (7s)	__TOKENS.morph.states (2+); reuse the same token key across states for a token that should glide.	A refactor / rename / signature change where continuity matters (not add/remove framing).
code-typing	Per-character typewriter reveal with a gliding caret. (5s)	single state in __TOKENS.feature.states[0].	A new function / file written on screen ("here's what we added").
code-highlight	A blue band sweeps one line; the rest dim. (5s)	__BLOCK.line = target line, 0-based here. single state.	"This one line is the change" — spotlight a changed/important line. Quick callout.
code-scroll	"Camera" scrolls a long file to center a target line, dims the rest. (6s)	__BLOCK.line = target, 1-based here. one long state.	Locating the change in a large file. The only block built for long files.
code-3d-extrude	Code on a lit, beveled 3D slab that rotates and settles. (8s, WebGL)	single state; __BLOCK.seed. <canvas id="gl">.	A hero / title code moment ("the feature"). Style over density — not for reading a diff.
code-particle-assemble	GPU particles scatter, then fly to the exact glyph pixels and resolve to syntax color. (8s, WebGL)	single state; __BLOCK.seed.	A dramatic climax reveal of a key snippet. Flashiest; not for line-by-line reading.
code-shader-dissolve	Code "compiles into existence" out of seeded noise with a moving dissolve front + edge glow. (7s, WebGL)	single state; __BLOCK.seed.	A "compiles / builds / works now" beat, or a polished snippet reveal.
code-snippet-flight	Discrete snippets fly in from the side and assemble into a stacked program (block-level FLIP). (6s)	__TOKENS.flight.states.	"The pieces assemble" — several functions/modules coming together. (An animation block despite the code-snippet- prefix.)

Gotchas (call out so the worker doesn't trip):

• Fit the cadence to the frame's data-duration. Each block carries its own internal timing — code-typing types at a fixed per-character speed, so a snippet that's long relative to a short frame overruns: the code never finishes typing within data-duration, and the chrome beats around it (an underline, a +N/−M count-up) never play. Check char-count × per-char cadence (plus the block's settle) against data-duration, and tune the timing so the full block lands inside the frame. This is the one code-motion knob you MUST set to the frame — you're fitting the timing, not redesigning the effect (the typewriter / diff / morph stays the block's).
• code-diff and code-morph need ≥2 baked states; every other animation block uses a single state.
• Line indexing differs: code-highlight is 0-based (line: 1 = the 2nd line); code-scroll is 1-based. Don't off-by-one.
• No caption-safe band. These are full-bleed 1920×1080 code surfaces with no reserved caption area. When captions are enabled, the frame must keep the code panel clear of the bottom caption keep-out band (composite the block in the top ~83%, or scale/inset it) — the worker owns that, not the block.

The code-snippet-* theme family (standalone, not palettes)

These are NOT palettes you attach to the animation blocks — each is its own ready-made ~11–12s composition rendering a full developer UI with baked typing and its own timeline. Use one when you want ambient realistic context (a real IDE or terminal on screen), not a focused diff. Install the specific one: npx hyperframes add code-snippet-<name>.

• VS Code workbench (12): full VS Code window (activity bar, file-tree, tabs, editor with per-char typing, integrated terminal running pytest, status bar) in each theme. dark-plus, light-plus, dark-modern, light-modern, dark-2026, light-2026, monokai, solarized-light, visual-studio-dark, visual-studio-light, high-contrast, high-contrast-light. (Each pulls a background.jpeg into assets/.)
• Apple Terminal (12): macOS Terminal.app window typing a shell command per profile. apple-terminal- + basic, clear-dark, clear-light, grass, homebrew, man-page, novel, ocean, pro, red-sands, silver-aerogel, solid-colors.

The theme is baked into each block (not chosen at runtime); to use a given look, install that block and edit its codeLines. For claude's editorial register, prefer the focused animation blocks on the navy Code Surface; reach for a code-snippet-* UI only when "show it in a real editor/terminal" is the point.

Showing behavior — the mechanism beat (not a code-* block)

A code-* block shows the code. It does not show what the code does. The single biggest cause of a flat PR video is a body that is all code surfaces — so for any change with a visible runtime behavior, plan a mechanism beat that animates the behavior (story-design owns the rhythm; this is the vocabulary).

A mechanism beat is not a registry code-* block. It is one of:

• an invented animated diagram — SVG / HTML / GSAP the frame worker builds from claude's atoms (hairline-ink nodes / edges / lanes on cream, one coral marker on the active element), the build playing out the behavior across the shot; or
• a flowchart / flowchart-vertical registry block — a process / pipeline / state flow; or
• a data-chart registry block — a perf / metric comparison (two bars or timelines racing).

flowchart, flowchart-vertical, and data-chart install exactly like a code block (npx hyperframes add <name>) and mount as a sub-composition — so when a mechanism frame names one in its scene, Step 5 pre-installs it alongside the code-* blocks. An invented SVG/GSAP diagram needs no install (the worker hand-builds it).

What to animate, by what the change touches (the menu story-design plans from):

The change touches…	Animate (the behavior)	Use
Retry / backoff / resilience	request lifecycle: fire → 500 → wait (delay growing) → retry → 200	invented SVG/GSAP
Caching / memoization	two lanes racing: cold (hits DB) vs cached (hits cache)	invented SVG/GSAP
Concurrency / parallelism	a serial lane reshaping into parallel lanes	invented / flowchart
Race / ordering bug	the broken flow (dropped items, colliding writers), then the fixed flow	invented SVG/GSAP
Performance	two timelines / bars racing, the new one finishing first	data-chart
Refactor / migration	a tangled call-graph untangling; same inputs → same outputs	flowchart / invented
New endpoint / pipeline / state	data flowing the new path; a state machine lighting up step by step	flowchart-vertical

Unlike a code-* block (which owns its own animation), the diagram's motion is yours — sequence ≥3 effects into entrance (draw the nodes / lanes) → development (run the flow) → settle (the resolved state + one coral emphasis). Never let it enter then freeze.

PR beat → block cheat-sheet

PR moment	Block(s)
Diff hunk (before → after)	code-diff
Refactor / rename / signature change (continuity)	code-morph
Failing → passing test (red → green)	code-morph or code-diff + code-highlight on the green line; a code-snippet-* VS Code/terminal block for a literal test-runner UI
New function / file typed on	code-typing
Spotlight one changed line	code-highlight
Walk / scroll a long changed file	code-scroll
Pieces / modules assembling into a feature	code-snippet-flight
Hero / title code moment ("the feature")	code-3d-extrude
"Compiles / builds / works now" reveal	code-shader-dissolve
Big dramatic snippet reveal / climax	code-particle-assemble
A benchmark / metric / count-up	Not a code-* block — use claude's number-lockup (Number/Impact treatment) or the data-chart registry block
What the change DOES at runtime (behavior, not code)	Not a code-* block — a mechanism beat: an invented SVG/GSAP diagram, or flowchart / flowchart-vertical / data-chart. See "Showing behavior" above.
Show the change in a realistic IDE / terminal (ambient)	a code-snippet-* VS Code theme (editor) or Apple Terminal profile (CLI run)