fill_template: plantillas con huecos (trends) sin re-animar

README.md

@@ -92,6 +92,7 @@ Bigger options, not implemented (each adds always-loaded tokens or needs a decis
 | `get_motion_recipe` | On demand: real, validated JSON/HTML/CSS patterns for looks the basics do not give. Without `name` it returns the index; with one, a recipe: `riso` (print, overprint, grain), `choreography` (keyframes, springs, easings), `audio`, `camera`, `code-texture`, `ui-mockup` (the 11 `ui` kinds), `scene-bg` (a background per scene), `looks` (the 13 looks in one table) and `look:<id>` (one look in full). Plain text result; it stores nothing. | read-only |
 | `create_hcmotion` | Validates a finished composition and packages it as a `.hcmotion` file. Invalid input returns `created: false` with the errors to fix and stores nothing. Valid input returns `open` and `download` links (24 h). | write (creates a temporary file), not destructive |
 | `get_template` | Returns the full design of a Studio gallery template by its id and format (brief, scenes, HTML scene documents and layers), to use as a design reference. | read-only |
+| `fill_template` | Creates a .hcmotion project from a slot template (social-media trends such as `trend-portfolio-editor`): only the texts change, by layer id; the design, motion and music stay. Returns open and download links valid 24 hours. | creates a file |
 | `validate_json` | Checks a composition, design or improvement patch and returns errors and warnings. Rejects measurable text that cannot fit the canvas and line-height below 1. Warns (`RESERVED_NAME_DECLARED`) when a code layer or component declares a name the engine already provides (`S`, `H`, `ctx`, `t`, `w`, `h`, helpers such as `range`). It does not prove a correct render. | read-only |
 | `get_recreation_brief` | Takes the link of a public motion video (prompt-motion.com or oneshotted.io) and a moderator code (only moderators make gallery templates), plus the video file, prompt, title and author that Claude reads on that page (the source sites often refuse servers), and returns its source details, its published prompt when available, the brief to recreate it as a gallery template and reference frames of the original video (extracted once per video; the first call may answer that they are being prepared). prompt-motion.com refuses every server, so for its videos the brief returns a short script that Claude runs in its own code tool (or the same steps in a browser tool) to download the video and send it here in parts. | write (starts the frame extraction), not destructive |
 | `propose_template` | Submits the recreation (three compositions and the gallery card), with the moderator code. Checks the source, the compositions and the card; when accepted, renders the composition in the original's format with the Studio engine and compares it with the original frame by frame. Send fixes with the same code (up to 3 comparisons). Returns a tracking code. | write, not destructive |