Media Use

---
name: media-use
description: Agent Media OS — resolve any media need (BGM, SFX, image, icon) into a frozen local file + ledger record. One verb (`resolve`) handles the full cascade — project cache, global cache, HeyGen catalog search, freeze, register. Keeps search noise on disk, hands the agent a path. Use when a composition needs background music, sound effects, images, or icons.
---

# media-use

Resolve media needs into frozen local files. One verb, four types, zero context noise.

## When to use

Call `resolve` whenever a composition needs media — background music, sound effects, images, or icons. media-use searches the HeyGen catalog, downloads the best match, freezes it locally, and registers it in a manifest. The agent gets back one line; all search noise stays on disk.

## Resolve

```bash
node <SKILL_DIR>/scripts/resolve.mjs --type <type> --intent "<description>" --project <dir>
```

Returns one line: `resolved <id> → <path> (<type>, <metadata>)`

### Types

| Type    | What it finds       | Provider                                 |
| ------- | ------------------- | ---------------------------------------- |
| `bgm`   | Background music    | HeyGen audio catalog (10k+ tracks)       |
| `sfx`   | Sound effects       | Bundled 19-file library + HeyGen catalog |
| `image` | Photos, backgrounds | HeyGen asset search (75k+ vectors)       |
| `icon`  | Icons, logos        | HeyGen asset search (type=icon)          |

### Examples

```bash
# Background music
node <SKILL_DIR>/scripts/resolve.mjs --type bgm --intent "upbeat tech launch" --project .
# → resolved bgm_001 → .media/audio/bgm/bgm_001.mp3 (bgm, 25s)

# Sound effect
node <SKILL_DIR>/scripts/resolve.mjs --type sfx --intent "whoosh" --project .
# → resolved sfx_001 → .media/audio/sfx/sfx_001.mp3 (sfx, 0.57s)

# Image
node <SKILL_DIR>/scripts/resolve.mjs --type image --intent "gradient tech background" --project .
# → resolved image_001 → .media/images/image_001.jpg (image)

# Icon
node <SKILL_DIR>/scripts/resolve.mjs --type icon --intent "rocket" --project .
# → resolved icon_001 → .media/images/icon_001.png (icon, transparent)
```

### Flags

| Flag            | Description                                |
| --------------- | ------------------------------------------ |
| `--type, -t`    | Media type: bgm, sfx, image, icon          |
| `--intent, -i`  | What you need (natural language)           |
| `--entity, -e`  | Entity name for cache matching (optional)  |
| `--project, -p` | Project directory (default: .)             |
| `--adopt`       | Bulk-import existing assets/ into manifest |
| `--json`        | Output JSON instead of one-line result     |

## How it works

1. Check project `.media/manifest.jsonl` for exact-prompt match
2. Scan existing `assets/` directory for unregistered files matching the need
3. Check global cache `~/.media/` for reusable asset
4. Search via provider (HeyGen audio catalog, HeyGen asset search)
5. Freeze file to `.media/<type>/`, register in manifest, regenerate `index.md`

The agent gets back **one line**. Candidates, scores, provenance stay on disk.

## Adopt existing projects

Most HyperFrames projects already have assets in `assets/`. media-use adopts them:

```bash
node <SKILL_DIR>/scripts/resolve.mjs --adopt --project .
# → adopted 9 assets from assets/
#   bgm_001 → assets/bgm/mango-fizz.mp3 (bgm, 146.6s)
#   image_001 → assets/images/avatar.jpg (image, 400×400)
```

`ffprobe` extracts real duration and dimensions. During resolve, unregistered files in `assets/` matching the intent are adopted on the fly.

## Reading the inventory

After resolve or adopt, read `.media/index.md` for the full inventory:

```
# .media · 4 assets

id         type   dur   dims       path                          description
bgm_001    bgm    25s   —          .media/audio/bgm/bgm_001.mp3  upbeat tech launch
sfx_001    sfx    0.6s  —          .media/audio/sfx/sfx_001.mp3  whoosh
image_001  image  —     1920×1080  .media/images/image_001.jpg   gradient tech background
icon_001   icon   —     200×200    .media/images/icon_001.png    rocket
```

## Cross-project reuse

Assets are cached automatically on resolve. Subsequent resolves for the same prompt hit the global cache at `~/.media/` — no re-download, no provider call. Promote an asset explicitly with `organize --promote <id>` to make it reusable across all projects.

## Files

- `.media/manifest.jsonl` — machine SSOT, one JSON record per line
- `.media/index.md` — agent-readable table (id, type, dur, dims, path, description)
- `~/.media/` — global cross-project reuse cache (content-addressed, SHA-256)

## CLI tools used

| Tool      | Purpose                                    | Required?     |
| --------- | ------------------------------------------ | ------------- |
| `ffprobe` | Probe duration, dimensions, codec on adopt | Yes           |
| `heygen`  | Audio catalog, asset search                | For providers |

Install the `heygen` CLI (single static binary, no runtime) and authenticate:

```bash
curl -fsSL https://static.heygen.ai/cli/install.sh | bash   # installs latest to ~/.local/bin
heygen update                                               # if already installed: needs >= v0.1.6
export HEYGEN_API_KEY=<your-key>                            # or: heygen auth login --key <key>
```

Requires **heygen >= v0.1.6** — the providers tag requests with the allowlisted `--headers 'X-HeyGen-Client-Source: media-use'` flag, added in v0.1.6. `asset search` is a pre-launch command hidden from `heygen --help`, but it runs. Without a `heygen` on PATH (or a valid key) the providers print a one-line diagnostic to stderr and resolve falls through to "no provider could resolve".