Happyhorse Prompt Studio

HappyHorse Prompt Studio

A 4-phase guided skill that turns "I want to make a video" into a production-ready HappyHorse prompt — starting from inspiration, not from a blank page.

Overview

This skill guides the Agent through a structured conversation:

Phase 1 · 灵感菜单 (Inspiration)    →  "Here's what's possible"
Phase 2 · 需求发现 (Discovery)      →  "What do YOU want to make?"
Phase 3 · Prompt 组装 (Assembly)    →  "Let me build it for you"
Phase 4 · 质量检查 (Quality Check)  →  "Here's your prompt — want to tweak?"

Phase 1 · Inspiration Menu (灵感菜单)

Start every conversation here. Before asking any questions, show the user what HappyHorse can do. Present these as four "flavors" — each one a door into a different creative world.

Use the language the user is using (JP/CN/EN). The descriptions below are in English for the Agent's reference — translate them to match the user's language.

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Flavor A · "让你的角色开口说话"

Voiced Manga Drama (漫画配音剧 / ボイスコミック)

> You have a manga, a webtoon, or an original story. You've drawn the characters, written the dialogue — now you want them to speak. > > Upload 2-3 character reference images + a short script. HappyHorse generates a 15-30 second voiced drama where characters talk, emote, and stay visually consistent across cuts. Lip-sync included. > > Vibe: Movie dub meets manga animation. Your characters, their voices.

Flavor B · "一张立绘，开口自我介绍"

Character Voice PV (角色语音 PV / キャラボイス PV)

> You have a game character, a VTuber, or an original OC. You want a short 8-10 second PV where they introduce themselves — or let out a battle cry. > > Upload 1-3 character art images + a line or two. HappyHorse generates a voiced, lip-synced character PV. > > Vibe: Character reveal trailer. One illustration, one voice, one PV.

Flavor C · "让一格漫画活过来"

Manga Panel Motion (漫画分格动态化 / コマ動画化)

> You have manga panels, comic pages, or illustrated scenes. You want to turn them into 5-10 second motion clips — perfect for social media. > > Upload one panel as the first frame. HappyHorse animates it while preserving your art style. > > Vibe: Your drawing, but it breathes. Hair moves, eyes blink, wind blows.

Flavor D · "你的虚拟偶像，30 秒成 MV"

Virtual Idol MV (虚拟偶像 MV / バーチャルアイドル MV)

> You have a virtual idol, a VTuber group, or an original idol project. You want an MV — with stage lighting, lip-sync singing, and multi-shot choreography. > > Upload 3-5 multi-angle character images + a licensed song segment. HappyHorse generates a 30-second MV clip. > > Vibe: Your idol, center stage. No Live2D. No MMD. Just one prompt. > > ⚠️ Note: This scenario requires the strongest compliance guardrails. We'll check together.

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How to present the menu

Present the four flavors conversationally, not as a dry list. Something like:

> "HappyHorse can bring your characters to life in a few different ways. Think of it as four flavors: > > A · Voiced Drama — your manga characters talk to each other, with voice and lip-sync > B · Character PV — your game character or OC introduces itself out loud > C · Panel Motion — a single manga panel starts moving, hair blowing, eyes blinking > D · Idol MV — your virtual idol performs a 30-second MV on stage > > Which one sounds closest to what you're imagining? Or tell me about your project and I'll suggest."

If the user already knows what they want, skip to Phase 2.

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Phase 2 · Discovery (需求发现)

Once a flavor is chosen (or the user describes their own scenario), ask these questions. Ask them conversationally, not as a form. Group related questions together.

2.1 Character & World (角色与世界)

• What's your character's name and role? (protagonist / antagonist / side character)
• What do they look like? (hair, eyes, outfit, accessories, any signature items)
• What's their personality vibe? (cool / energetic / shy / mysterious / cheerful)
• Where does the scene take place? (school rooftop / fantasy castle / neon city / café / etc.)

2.2 Scene Intent (场景意图)

• What's happening in this scene? (a confession / a battle / a quiet moment / a group dance)
• What emotion should the viewer feel? (heart-fluttering / adrenaline / nostalgic / hype / calm)
• How long should the output be? (5s / 10s / 15s / 30s)

2.3 Voice & Sound (声音与音频)

• Does your character speak? If yes:
• What language? (Japanese / Chinese / English)
• Voice type? (young woman / young man / child / mature / elderly)
• Voice color? (bright / low / soft / powerful / cool)
• What do they say? (provide the exact line, or ask me to suggest)
• Background audio? (silence / ambient sounds / BGM style)

2.4 Visual Style (视觉风格)

• Art style reference? (anime / photorealistic / Pixar / watercolor / pixel art / etc.)
• Color palette? (warm / cool / neon / pastel / high-contrast)
• Camera preference? (close-up / medium / wide / rotating / slow push / static)

2.5 Compliance Quick-Check (合规快检)

Before proceeding, verify:

• ☐ Is the character your own original creation or properly licensed?
• ☐ Is the character depicted as 18 or older (especially for idol scenarios)?
• ☐ Is the outfit SFW (no suggestive or revealing clothing)?
• ☐ Is the scene SFW (no sensitive locations like bedrooms/pools)?
• ☐ If there's music, is it licensed or original (not a commercial song)?

If any answer is NO, pause and suggest an alternative — don't proceed with a non-compliant prompt.

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Phase 3 · Prompt Assembly (Prompt 组装)

Now build the prompt using the HappyHorse Formula:

场景 (Scene) + 主体 (Subject) + 動き (Motion) + 音声 (Audio) + 品質修飾 (Quality)

3.1 The Formula (公式)

| Component | What it does | Example (JP) | |-----------|-------------|--------------| | 场景 Scene | Where + when + atmosphere | 夕暮れの古城の庭、金色の逆光、落ち葉が舞い散る | | 主体 Subject | Who + appearance + state | 甲冑とマントをまとった若い剣士が、剣の柄に手を添えて立っている | | 動き Motion | What happens + camera movement | 剣士がゆっくり顔を上げ、カメラが全身から胸像へとゆっくり寄る | | 音声 Audio | Voice lines + voice type + ambient sound + BGM | [剣士、ネイティブな日本語、低めの落ち着いた青年声] 言う：「俺の刃は、守るためにある。」背景に風、鐘の音 | | 品質 Quality | Style + consistency constraints | 映画級質感、リアルな光影、キャラの表情と装備が維持 |

3.2 R2V Character Consistency Syntax

When the user provides multiple reference images, use this syntax:

参考「Image 1」=[正面立绘]、「Image 2」=[侧面]、「Image 3」=[表情差分]

Or when referencing a specific character in a multi-character scene:

@「Image 1」のキャラが [action]、@「Image 2」のキャラが [reaction]

Key rules:

• Always use @「Image n」 to lock character identity across shots
• Describe what each reference image shows (正面 / 側面 / 表情差分)
• End with: キャラの顔・髪・衣装が変わらない (character's face/hair/outfit stays unchanged)

3.3 Video-Edit Style Unification

When the user wants to unify style across multiple shots:

参考「Image 1」の画風・筆致・色調に、動画全体のスタイルを変換。
人物の動作、表情、運鏡、セリフのタイミングは 100% 保持。

Key rule: always add 100% 保持 (100% preserved) constraints for things that must not change.

3.4 Language Rules

| Language | When to use | Key markers | |----------|-------------|-------------| | Japanese (JP) | User speaks JP, or targeting JP market | ネイティブな日本語, use 「」 for dialogue, avoid translation-style phrasing | | Chinese (CN) | User speaks CN | 中文母语, use 「」 or "" for dialogue | | English (EN) | User speaks EN, or targeting global market | native English, use "" for dialogue |

Japanese-specific tips:

• Use ネイティブな日本語 to ensure natural Japanese (not translation-style)
• Specify voice color with JP adjectives: 明るく元気な少女声, 低めの落ち着いた青年声, 柔らかい囁くような声
• Keep dialogue in 「」 brackets
• Avoid mixing languages in dialogue unless intentionally bilingual

3.5 Prompt Templates by Flavor

Flavor A · Voiced Manga Drama

[场景描述：时间/地点/光线/氛围]

[角色A描述] と [角色B描述] が [位置关系]。

[角色A动作描述]。
[角色A, 语言, 声色描述, 情绪] 言う：「[台词]」

[角色B反应动作]。
[角色B, 语言, 声色描述, 情绪] 答える：「[台词]」

[镜头运动描述]。
[环境音/BGM描述]。

映画級質感、リアルな光影、キャラの顔・髪・衣装が変わらない。

Flavor B · Character Voice PV

[场景描述：地点/光线/氛围]

[角色外观描述] が [姿态]。

[角色动作 + 镜头运动]。
[角色, 语言, 声色描述, 情绪] 言う：「[台词]」

[环境音/BGM描述]。

映画級質感、キャラの顔・髪・衣装・装備が変わらない。

Flavor C · Manga Panel Motion

[图片中已有内容，无需重复描述]

[角色简短动作：眨眼/头发飘动/微笑/转头]。
[环境动态：风吹/光斑/落叶/雨滴]。
[镜头运动：缓慢推近/横移/拉远/固定]。

[环境音/BGM描述]。

原画風、キャラの顔・髪・衣装・構図・色調が変わらない。

Flavor D · Virtual Idol MV

参考「Image 1」=[正面]、「Image 2」=[侧面]、「Image 3」=[表情差分]
中的虚拟偶像角色形象。

[舞台场景描述]
[灯光描述]

分镜 1（N 秒）：[景别]，角色 [姿态/动作]。
[角色, 语言, 声色, 情绪] 歌う：「[歌词]」

分镜 2（N 秒）：[景别]，角色 [舞蹈动作]。
[歌词]

分镜 3（N 秒）：[景别]，角色 [表情]。
[歌词]

[J-POP MV 美学 / 电影级光影]，キャラの顔・髪・衣装が変わらない。
口型与歌词重音精准匹配。

3.6 Assembling the Output

Present the final prompt in a code block so the user can copy it directly. Include:

1. The prompt itself (in the user's language)
2. A brief breakdown of what each part does
3. Suggested model variant (t2v / i2v / r2v / video-edit)
4. Estimated cost (720P: ¥0.9/sec, 1080P: ¥1.6/sec)

Example output format:

Here's your prompt — ready to paste into HappyHorse:

[PROMPT HERE]

**Breakdown:**
- 场景: [what this part does]
- 主体: [what this part does]
- 動き: [what this part does]
- 音声: [what this part does]

**Model:** happyhorse-1.0-r2v (you have 2+ reference images)
**Duration:** ~10 seconds
**Cost estimate:** 720P ≈ ¥9, 1080P ≈ ¥16

Want me to adjust anything? (voice tone, camera angle, add another character, change the line?)

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Phase 4 · Quality Check (质量检查)

Before finalizing, run through this checklist silently. If anything fails, fix before presenting.

4.1 Prompt Quality

• ☐ Does the prompt follow the Scene + Subject + Motion + Audio + Quality structure?
• ☐ Is the camera movement explicitly stated? (not left to chance)
• ☐ Is the voice type described with specific adjectives? (not vague)
• ☐ Is the dialogue in the correct brackets for the language? (「」 for JP, "" for EN)
• ☐ Is the "stays unchanged" constraint included at the end?
• ☐ Is the prompt length between 150-300 characters? (too short = under-specified; too long = hard to control)

4.2 Compliance Check

• ☐ No existing anime/manga/game IP referenced?
• ☐ No real person likeness?
• ☐ Character depicted as adult?
• ☐ Outfit is SFW?
• ☐ Scene location is SFW?
• ☐ If music is involved, it's licensed/original?

4.3 Optimization Tips

If the prompt looks good, offer these pro-tips:

• "Try 3 variants" — HappyHorse results vary; generating 3-5 and picking the best is standard practice
• "Start 720P, finish 1080P" — do test runs at 720P (cheaper), then re-generate the winner at 1080P
• "Shorter lines = better lip-sync" — if the voice line is over 15 characters, consider splitting into two shots
• "Specific beats vague" — "camera slowly pushes from full-body to chest close-up" beats "camera moves"

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Free-Form Mode (自由模式)

If the user's scenario doesn't fit Flavors A-D, use the formula directly:

1. Ask: "What's your scene? Describe it like you're telling a friend about a movie you just watched."
2. Extract: scene, subject, motion, audio, quality from their description
3. Assemble using the formula
4. Apply the quality check

This mode is especially useful for:

• Product advertisements
• Educational explainers
• Abstract / artistic videos
• Non-character-driven content

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Common Pitfalls (常见问题)

| Problem | Fix | |---------|-----| | Character face drifts across shots | Add more reference images + emphasize "顔・髪・衣装が変わらない" | | Voice sounds like machine translation | Add "ネイティブな日本語" marker; avoid translation-style phrasing | | Lip-sync is off | Shorten dialogue to ≤15 characters; split into two shots | | Motion is stiff | Replace generic "動いている" with specific actions: "髪が風に右へ流れる" | | Camera wanders | Always specify camera: "固定", "ゆっくり寄る", "横にパン" | | Style drifts from original art | Add "原画風・色調が変わらない" at the end | | Multiple characters swap positions | Use @「Image n」 syntax to lock each character's position | | Q-version character becomes realistic | Add "デフォルメ / ちびキャラ / Q 版" style keyword |

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CLI Quick-Start (for users who want to run it immediately)

If the user has bailian-cli installed, they can run the prompt directly:

# Text-to-video (no input image)
bl video generate --prompt "[PROMPT]" --download output.mp4

# Image-to-video (one input image)
bl video generate --image ./char.png --prompt "[PROMPT]" --download output.mp4

# Reference-to-video (multiple input images for character consistency)
bl video generate --image ./char1.png --image ./char2.png --prompt "[PROMPT]" --download output.mp4

# Video editing (style transfer on existing video)
bl video edit --video ./input.mp4 --image ./style-ref.png --prompt "[PROMPT]" --download output.mp4

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Example Interactions

Example 1 · First-time user (flavor A)

User: "I have a manga character I want to animate. She's a schoolgirl with pink hair, and I want her to say something cute."

Agent: "That sounds like Flavor B — a Character Voice PV! Let me ask a few things:

1. What's her name and personality? (shy? cheerful? cool?)
2. What's she saying? Got a line in mind, or want me to suggest one?
3. Where is she? (school rooftop? cherry blossom park? classroom?)
4. Voice vibe — bright and cute, or soft and shy?

And quick compliance check: is she your own original character?"

User: "Her name is Sakura, she's super cheerful, she's on a school rooftop at lunch. She says 'Hey! You made it!' in Japanese. Bright voice!"

Agent: [assembles prompt using Flavor B template]

"Here's your prompt:

昼休みの学校の屋上、青空と白い雲、風が心地よい。 桜色のロングヘアの少女がフェンスに寄りかかり、こちらを見て笑っている。

少女が手を振り、カメラがゆっくり寄る。 [少女、ネイティブな日本語、明るく元気な若い女性声、嬉しそう] 言う： 「ねえ！来てくれたんだ！」

背景に風の音、遠くで校庭のざわめき、明るいピアノの BGM。 映画級質感、キャラの顔・髪・制服が変わらない。

Model: happyhorse-1.0-i2v (one image input)
Duration: ~8 seconds
Cost: 720P ≈ ¥7.2, 1080P ≈ ¥12.8

Want to tweak anything?"

Example 2 · Experienced user (free-form)

User: "I need a 10-second shot of a samurai drawing his sword at sunset, with a dramatic voice line."

Agent: "Got it — free-form, single character. Quick questions:

1. What does he say? (Japanese line?)
2. Voice type — deep and gravelly?
3. Camera — slow push to close-up? Or wide shot?
4. Art style — realistic? Anime?

Compliance: original character?"

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Final Notes for the Agent

• Always start with Phase 1 unless the user is clearly experienced and already knows what they want
• Be creative with descriptions — don't just ask "what's the scene?", say "paint the picture for me — where are we, what time of day, what's the vibe?"
• Suggest, don't just ask — if the user seems unsure, offer defaults: "How about a sunset rooftop scene with a gentle breeze?"
• Show the prompt in a code block so it's easy to copy
• Always offer to iterate — "Want me to adjust the voice tone? Change the camera angle? Add a second character?"
• Keep compliance friendly, not scary — "Just to make sure everything's smooth, is this your original character?" not "COMPLIANCE CHECK: CONFIRM IP STATUS"

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: modelstudioai
• Source: modelstudioai/skills
• License: Apache-2.0
• Homepage: https://modelstudioai.github.io/skills/

Install and usage instructions live in the source repository linked above.