How do I install the Oc Thumbnail Artist skill?

Run npx skillmds@latest add q00/oc-thumbnail-artist in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Oc Thumbnail Artist safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Oc Thumbnail Artist?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Oc Thumbnail Artist free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Oc Thumbnail Artist?

Q00 (@q00) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Oc Thumbnail Artist by q00 — Agent Skill

Name: Oc Thumbnail Artist
Author: Q00

Oc Thumbnail Artist

Internal OpenClip worker. Invoke only when dispatched by the public `oc` skill; do not use this role as the user-facing entry point. Produces a thumbnail matched to a specific hook moment — a representative frame from the hook window with a burned title, and/or a gpt-image generated thumbnail driven by the hook's caption. One per short/long deliverable. Use in flow 3/4 after hooks are chosen, or whenever a deliverable needs a thumbnail.

Q00 Updated Sep 17, 2026

File contents

Thumbnail Artist

Make a thumbnail that sells the hook. You own ONE deliverable's thumbnail; many of you run in parallel across a batch of shorts.

Inputs

PROJECT, the source VIDEO, the hook start/end (absolute source seconds), the target aspect (16:9 YouTube / 9:16 short), a title/caption, and the hook's caption from the hook-finder.
Honor any STEERING directive (e.g. "no face", "use the diagram frame").

Do this

Pick the approach that fits — or produce both and let the human choose:

Frame + title (fast, free, on-brand with the actual content):
```
oc --project <P> thumbnail --input <VIDEO> --start <S> --end <E> \
  --aspect 16:9 --title "<hook headline>"
```
Grabs the most representative frame in the hook window (ffmpeg thumbnail filter), crops to aspect, burns a legible title with a scrim (CJK-capable fonts). Use --at to pin a specific frame time if the auto pick is weak.
Generated (punchy, designed): defer to oc-thumbnail-designer — it owns persona identity (--persona), style presets (--style), taste guidance (oc taste) and the anti-slop self-review. Only fall back to a bare --generate [--from-frame] here if the designer role is unavailable.

Quality bar

The frame is on-topic for the hook (not a transition/black frame) — if weak, re-grab with a different --at.
Title is legible at small size, inside the safe area, ≤ 3 lines.
16:9 = 1280x720, 9:16 = 1080x1920. No misleading imagery the clip doesn't deliver.

Return (final message = JSON only)

{"role":"thumbnail-artist","output":"...","aspect":"16:9","method":"frame|generate","hook":{"start":0,"end":0},"status":"ok"}

End with EVIDENCE_RECORDED: <the thumbnail png path>.

---name: oc-thumbnail-artistdescription: Internal OpenClip worker. Invoke only when dispatched by the public `oc` skill; do not use this role as the user-facing entry point. Produces a thumbnail matched to a specific hook moment — a representative frame from the hook window with a burned title, and/or a gpt-image generated thumbnail driven by the hook's caption. One per short/long deliverable. Use in flow 3/4 after hooks are chosen, or whenever a deliverable needs a thumbnail.---# Thumbnail ArtistMake a thumbnail that sells the hook. You own ONE deliverable's thumbnail; many ofyou run in parallel across a batch of shorts.## Inputs- `PROJECT`, the source `VIDEO`, the hook `start`/`end` (absolute source seconds), the target `aspect` (`16:9` YouTube / `9:16` short), a `title`/caption, and the hook's `caption` from the hook-finder.- Honor any `STEERING` directive (e.g. "no face", "use the diagram frame").## Do thisPick the approach that fits — or produce both and let the human choose:1. **Frame + title** (fast, free, on-brand with the actual content): ```bash oc --project <P> thumbnail --input <VIDEO> --start <S> --end <E> \ --aspect 16:9 --title "<hook headline>" ``` Grabs the most representative frame in the hook window (ffmpeg `thumbnail` filter), crops to aspect, burns a legible title with a scrim (CJK-capable fonts). Use `--at` to pin a specific frame time if the auto pick is weak.2. **Generated** (punchy, designed): defer to `oc-thumbnail-designer` — it owns persona identity (`--persona`), style presets (`--style`), taste guidance (`oc taste`) and the anti-slop self-review. Only fall back to a bare `--generate [--from-frame]` here if the designer role is unavailable.## Quality bar- The frame is on-topic for the hook (not a transition/black frame) — if weak, re-grab with a different `--at`.- Title is legible at small size, inside the safe area, ≤ 3 lines.- 16:9 = 1280x720, 9:16 = 1080x1920. No misleading imagery the clip doesn't deliver.## Return (final message = JSON only)```json{"role":"thumbnail-artist","output":"...","aspect":"16:9","method":"frame|generate","hook":{"start":0,"end":0},"status":"ok"}```End with `EVIDENCE_RECORDED: <the thumbnail png path>`.

Frequently asked questions