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wehub-resource-sync
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# preview, play, render, publish
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Serve, render, and share commands.
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## preview
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```bash
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npx hyperframes preview # serve current directory
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npx hyperframes preview --port 4567 # custom port (default 3002)
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npx hyperframes preview --selection --json # print the current Studio selection and exit
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npx hyperframes preview --context --json # print compact agent context from Studio
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```
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Hot-reloads on file changes. Opens Studio in the browser automatically — the full timeline editor, where the user can play the video and edit anything by hand before rendering. This is the review surface, not just a viewer.
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When handing a project back to the user, use the Studio project URL, not the source `index.html` path:
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```text
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http://localhost:<port>/#project/<project-name>
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```
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Use the actual port and project directory name; treat `index.html` as source-code context, not the preview surface. For example, after `npx hyperframes preview --port 3017` in `codex-openai-video`, report `http://localhost:3017/#project/codex-openai-video`.
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### Agent context from Studio selection
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`preview --context` and `preview --selection` are the agent bridge into a running Studio session. They do **not** start a new server; they find the active preview server for the current project, read agent-useful state from Studio, print it, and exit.
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Use it when the user gives deictic edit instructions like "change this", "move the selected element", "make the card I clicked bigger", or "fix the current selection":
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```bash
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npx hyperframes preview --context --json --context-fields selection
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```
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The compact context payload includes the selected element's source file, composition path, current timeline time, `data-hf-id` / selector target, bounding box, text content, and a thumbnail URL for the selected element. Prefer `selection.target.hfId` when present; fall back to `selection.target.selector` only when no stable `data-hf-id` exists. If `selection` is `null`, inspect `errors.selection.code` (for example, `no-selection`).
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Keep agent context small by asking only for the slices you need:
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```bash
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npx hyperframes preview --context --json --context-fields selection
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npx hyperframes preview --context --json --context-fields lint
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npx hyperframes preview --context --json --context-fields selection,lint
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```
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Use `--context-detail full` only when the edit genuinely needs heavy selection fields such as `computedStyles`, `inlineStyles`, `dataAttributes`, or editable text-field metadata:
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```bash
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npx hyperframes preview --context --json --context-fields selection --context-detail full
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```
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`preview --selection --json` remains available when you explicitly want the full selected-element payload and do not need lint/server context.
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Failure modes:
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| Code | Meaning |
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| -------------------------- | -------------------------------------------------------------------------- |
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| `preview-not-running` | Start Studio first with `npx hyperframes preview`. |
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| `ambiguous-preview-server` | Multiple matching Studio servers are open; rerun with one listed `--port`. |
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| `preview-port-mismatch` | The requested `--port` is not one of the matching Studio servers. |
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| `no-selection` | Studio is open, but the user has not selected an element yet. |
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| `selection-unavailable` | The running preview server does not expose selection context cleanly. |
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If there is no selection, ask the user to click the target element in Studio and rerun the command. If the server error lists candidate ports, rerun the same command with `--port <candidate>`. Do not infer the target from a screenshot when the CLI can give a stable element target.
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## play (lightweight player)
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```bash
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npx hyperframes play # current project, port 3003
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npx hyperframes play ./my-video # specific project
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npx hyperframes play --port 8080 # custom port
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```
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`play` serves the composition through the embeddable `<hyperframes-player>` web component instead of the full Studio UI. Use it when sharing a preview link or when Studio is heavier than needed (no editor, no panels). `play` reports the plain `http://localhost:<port>` URL — no `#project/<name>` fragment (that's a Studio routing convention only `preview` uses).
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The player's `playback-rate` attribute (preview speed control, drives the timeline's `timeScale`) is clamped to `[0.1, 5]`; values `≤ 0` or non-finite fall back to `1`. This is a preview/playback knob, not a composition `data-*` attribute — authored motion still renders at `1×`.
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### Launching with an external browser (preview + play)
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Both `preview` and `play` can open inside an explicit Chromium-compatible browser instead of the OS default. Two use cases: isolated Chromium profile, or external CDP attach (DevTools / Playwright / Puppeteer / browser-MCP). **HyperFrames itself does not own CDP automation** — this only exposes the endpoint; whatever connects to it is your problem. Not to be confused with `--browser-gpu` (a `render` flag controlling Chrome GPU access during capture).
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| Flag | Type | Notes |
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| ------------------------- | --------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| `--browser-path` | path | Absolute path to a Chromium-compatible executable (`/usr/bin/chromium`, `/Applications/Brave Browser.app/...`). |
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| `--user-data-dir` | path | Chromium-compatible profile directory. Requires `--browser-path`. Use a throwaway directory to keep state out of your main profile. |
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| `--remote-debugging-port` | integer 1-65535 | Open a Chromium CDP endpoint on the given port. **Requires both** `--browser-path` and `--user-data-dir` — refused otherwise, so a CDP endpoint cannot leak into your main profile by accident. |
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```bash
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# Open preview in an isolated Chromium profile
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npx hyperframes preview --browser-path /usr/bin/chromium --user-data-dir /tmp/hf-profile
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# Same plus a CDP endpoint on :9222 (attach DevTools / Playwright / etc.)
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npx hyperframes play --browser-path /usr/bin/chromium --user-data-dir /tmp/hf-profile --remote-debugging-port 9222
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```
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Validation runs before any server boots, so an invalid value exits cleanly without leaving a listening socket behind.
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## render
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> Render only after the user has reviewed in `preview` and approved. Don't auto-render when the checks pass.
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```bash
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npx hyperframes render # standard MP4 from cwd
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npx hyperframes render ./my-video --output ./out.mp4 # render from outside the project dir
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npx hyperframes render --output final.mp4 # named output (no timestamp)
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npx hyperframes render -c compositions/intro.html -o intro.mp4 # render a specific sub-composition file
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npx hyperframes render --quality draft # fast iteration
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npx hyperframes render --fps 60 --quality high # final delivery
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npx hyperframes render --format webm # transparent WebM
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npx hyperframes render --docker # byte-identical
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```
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> Default `--output` is `renders/<project-name>_<YYYY-MM-DD>_<HH-MM-SS>.<ext>` — timestamped per render so successive runs don't clobber each other. Pass `--output` to get a stable name.
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| Flag | Options | Default | Notes |
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| ------------------------------------ | -------------------------------------------------------------------------------------------------- | ------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| `dir` (positional) | path | cwd | Project directory. Omit to use current working directory. |
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| `--composition`, `-c` | path to composition file | `index.html` | Render a specific composition file (e.g. `compositions/intro.html`) instead of the project's `index.html`. |
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| `--output`, `-o` | path | `renders/<project>_<ts>.<ext>` | Output path. Default is timestamped (`<project-name>_YYYY-MM-DD_HH-MM-SS.<ext>`). |
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| `--fps` | 24, 30, 60 | 30 | 60fps doubles render time |
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| `--quality` | draft, standard, high | standard | draft for iterating |
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| `--format` | mp4, webm, mov, gif, png-sequence | mp4 | WebM/MOV render with transparency; gif for inline autoplay in GitHub PRs/READMEs/docs (two-pass palette encode, fps capped at 30 — prefer `--fps 15` — no audio, 1-bit transparency only, HDR falls back to SDR); png-sequence writes RGBA frames to a directory (AE/Nuke/Fusion ingest) |
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| `--gif-loop` | 0-65535 | 0 | GIF loop count; `0` loops forever. Only with `--format gif`. |
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| `--resolution` | landscape, portrait, landscape-4k, portrait-4k, square, square-4k (+ aliases `1080p`, `4k`, `uhd`) | — | Supersample via Chrome `deviceScaleFactor`. Aspect ratio must match composition; scale must be an integer. Not with `--hdr`. |
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| `--crf` | 0-51 | — | Encoder CRF (lower = higher quality). Mutually exclusive with `--video-bitrate`. |
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| `--video-bitrate` | e.g. `10M`, `5000k` | — | Target bitrate. Mutually exclusive with `--crf`. |
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| `--hdr` | flag | off | Force HDR output even with SDR sources. MP4 only. |
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| `--sdr` | flag | off | Force SDR even with HDR sources. |
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| `--workers` | number or `auto` | auto | Each worker spawns Chrome (~256 MB) |
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| `--docker` | flag | off | Reproducible output across hosts |
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| `--gpu` | flag | off | GPU-accelerated FFmpeg encoding (NVENC / VideoToolbox / VAAPI / QSV) |
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| `--browser-gpu` / `--no-browser-gpu` | flag | auto (local), off (docker) | Host GPU for Chrome/WebGL capture |
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| `--browser-timeout` | seconds (0.001–86400) | 60 | Puppeteer page-navigation timeout for the entry HTML. Raise when heavy compositions (many videos / fonts / remote assets) can't reach `domcontentloaded` within the 60s default. |
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| `--quiet` | flag | off | Suppress verbose output |
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| `--strict` | flag | off | Fail on lint errors |
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| `--strict-all` | flag | off | Fail on lint errors AND warnings |
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| `--variables` | JSON object | — | Override values declared in `data-composition-variables` |
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| `--variables-file` | path | — | JSON file with variable values (alternative to `--variables`) |
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| `--strict-variables` | flag | off | Fail render on undeclared keys or type mismatches in `--variables` |
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**Quality guidance:** `draft` while iterating, `standard` for review, `high` for final delivery.
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**Parametrized renders:** the composition declares its variables on the `<html>` root with **`data-composition-variables`** — a JSON **array of declarations** (`{id, type, label, default}` per entry) that defines the schema. Scripts inside read the resolved values via `window.__hyperframes.getVariables()`. The CLI `--variables '{"title":"Q4 Report"}'` is a JSON **object keyed by id** that overrides those declared defaults for one render; missing keys fall through, so the same composition runs unchanged in dev preview and in production. Sub-comp hosts can also override per-instance with `data-variable-values`. See the `hyperframes-core` skill for the full pattern.
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### feedback (report after rendering)
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After a render is verified, send one feedback line per task. This is the maintainers' primary signal — a render that finishes silently tells them nothing.
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```bash
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npx hyperframes feedback --rating 5 # clean run, no notes
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npx hyperframes feedback --rating 3 --comment "bg <video> renders grey in multi-scene; worked around with --format png-sequence"
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```
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`--rating` is 1-5 (required); `--comment` is free text — use it for any bug, workaround, missing feature, or confusing behaviour. Feedback is anonymous and attaches a `doctorSummary` (OS/Node/CPU/mem/ffmpeg) automatically, so don't repeat env in the comment. For a **bug**, a paraphrase can't be reproduced — give the maintainer: the **exact error string verbatim** and whether the render still produced output / silently fell back (`re-rendering via screenshot`) / hard-exited (`Killed: 9`, `Target closed`); the **isolated trigger** ("only at 4K", "only with a `<video>`", "only when the text uses `font-family: 苹方`"); the **exact command + `HF_*`/`PRODUCER_*` env**; and the **frame/timestamp + visual defect** vs. expected.
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Hit a reproducible bug? Add `--file-issue` (optionally `--dir <project>` and `--yes` for non-interactive shells) to also publish a minimal repro to a public URL and open a pre-filled GitHub `bug` issue draft for a maintainer to file. This publishes the project publicly, so it is opt-in and consent-gated; the issue is never auto-submitted.
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## publish
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```bash
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npx hyperframes publish # upload current project, return public URL
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npx hyperframes publish ./my-video # specific project
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npx hyperframes publish --yes # skip the confirmation prompt (scripts/CI)
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```
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Uploads the project's source (HTML + assets) and returns a stable public URL that renders in the browser. Use this for sharing a draft for review before rendering MP4, or for embedding the composition elsewhere. Lint findings are surfaced before upload but do not block.
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