explainer

Original：🇺🇸 English

Translated

Create explainer videos with narration and AI-generated visuals. Triggers on: "解说视频", "explainer video", "explain this as a video", "tutorial video", "introduce X (video)", "解释一下XX（视频形式）".

4installs

Sourcemarswaveai/skills

Added on2026-03-13

NPX Install

npx skill4agent add marswaveai/skills explainer

SKILL.md Content

View Translation Comparison →

When to Use

User wants to create an explainer or tutorial video
User asks to "explain" something in video form
User wants narrated content with AI-generated visuals
User says "explainer video", "解说视频", "tutorial video"

When NOT to Use

User wants audio-only content without visuals (use
```
/speech
```
or
```
/podcast
```
)
User wants a podcast-style discussion (use
```
/podcast
```
)
User wants to generate a standalone image (use
```
/image-gen
```
)
User wants to read text aloud without video (use
```
/speech
```
)

Purpose

Generate explainer videos that combine a single narrator's voiceover with AI-generated visuals. Ideal for product introductions, concept explanations, and tutorials. Supports text-only script generation or full text + video output.

Hard Constraints

No shell scripts. Construct curl commands from the API reference files listed in Resources
Always read
```
shared/authentication.md
```
for API key and headers
Follow
```
shared/common-patterns.md
```
for polling, errors, and interaction patterns
Always read config following
```
shared/config-pattern.md
```
before any interaction
Never hardcode speaker IDs — always fetch from the speakers API
Never save files to
```
~/Downloads/
```
— use
```
.listenhub/explainer/
```
from config
Explainer uses exactly 1 speaker
Mode must be
```
info
```
(for Info style) or
```
story
```
(for Story style) — never
```
slides
```
(use
```
/slides
```
skill instead)

<HARD-GATE> Use the AskUserQuestion tool for every multiple-choice step — do NOT print options as plain text. Ask one question at a time. Wait for the user's answer before proceeding to the next step. After all parameters are collected, summarize the choices and ask the user to confirm. Do NOT call any generation API until the user has explicitly confirmed. </HARD-GATE>

Step -1: API Key Check

shared/config-pattern.md

§ API Key Check. If the key is missing, stop immediately.

Step 0: Config Setup

shared/config-pattern.md

Step 0.

If file doesn't exist — ask location, then create immediately:

bash

mkdir -p ".listenhub/explainer"
echo '{"outputDir":".listenhub","outputMode":"inline","language":null,"defaultStyle":null,"defaultSpeakers":{}}' > ".listenhub/explainer/config.json"
CONFIG_PATH=".listenhub/explainer/config.json"
# (or $HOME/.listenhub/explainer/config.json for global)

Then run Setup Flow below.

If file exists — read config, display summary, and confirm:

当前配置 (explainer)：
  输出方式：{inline / download / both}
  语言偏好：{zh / en / 未设置}
  默认风格：{info / story / 未设置}
  默认主播：{speakerName / 未设置}

Ask: "使用已保存的配置？" → 确认，直接继续 / 重新配置

Setup Flow (first run or reconfigure)

Ask these questions in order, then save all answers to config at once:

outputMode: Follow
```
shared/output-mode.md
```
§ Setup Flow Question.
Language (optional): "默认语言？"
- "中文 (zh)"
- "English (en)"
- "每次手动选择" → keep
```
null
```
Style (optional): "默认风格？"
- "Info — 信息展示型"
- "Story — 故事叙述型"
- "每次手动选择" → keep
```
null
```

After collecting answers, save immediately:

bash

# Follow shared/output-mode.md § Save to Config
NEW_CONFIG=$(echo "$CONFIG" | jq --arg m "$OUTPUT_MODE" '. + {"outputMode": $m}')
echo "$NEW_CONFIG" > "$CONFIG_PATH"
CONFIG=$(cat "$CONFIG_PATH")

Note:

defaultSpeakers

are saved after generation (see After Successful Generation section).

Interaction Flow

Step 1: Topic / Content

Free text input. Ask the user:

What would you like to explain or introduce?

Accept: topic description, text content, or concept to explain.

Step 2: Language

config.language

is set, pre-fill and show in summary — skip this question. Otherwise ask:

Question: "What language?"
Options:
  - "Chinese (zh)" — Content in Mandarin Chinese
  - "English (en)" — Content in English

Step 3: Style

config.defaultStyle

is set, pre-fill and show in summary — skip this question. Otherwise ask:

Question: "What style of explainer?"
Options:
  - "Info" — Informational, factual presentation style
  - "Story" — Narrative, storytelling approach

Step 4: Speaker Selection

shared/speaker-selection.md

for the full selection flow, including:

Default from
```
config.defaultSpeakers.{language}
```
(skip step if set)
Text table + free-text input
Input matching and re-prompt on no match

Only 1 speaker is supported for explainer videos.

Step 5: Output Type

Question: "What output do you want?"
Options:
  - "Text script only" — Generate narration script, no video
  - "Text + Video" — Generate full explainer video with AI visuals

Step 6: Confirm & Generate

Summarize all choices:

Ready to generate explainer:

  Topic: {topic}
  Language: {language}
  Style: {info/story}
  Speaker: {speaker name}
  Output: {text only / text + video}

  Proceed?

Wait for explicit confirmation before calling any API.

Workflow

Submit (foreground):
```
POST /storybook/episodes
```
with content, speaker, language, mode → extract
```
episodeId
```
Tell the user the task is submitted

Poll (background): Run the following exact bash command with

run_in_background: true

and

timeout: 600000

. Do NOT use python3, awk, or any other JSON parser — use

jq

as shown:

bash

EPISODE_ID="<id-from-step-1>"
for i in $(seq 1 30); do
  RESULT=$(curl -sS "https://api.marswave.ai/openapi/v1/storybook/episodes/$EPISODE_ID" \
    -H "Authorization: Bearer $LISTENHUB_API_KEY" 2>/dev/null)
  STATUS=$(echo "$RESULT" | tr -d '\000-\037\177' | jq -r '.data.processStatus // "pending"')
  case "$STATUS" in
    success|completed) echo "$RESULT"; exit 0 ;;
    failed|error) echo "FAILED: $RESULT" >&2; exit 1 ;;
    *) sleep 10 ;;
  esac
done
echo "TIMEOUT" >&2; exit 2

When notified, download and present script:
Read
```
OUTPUT_MODE
```
from config. Follow
```
shared/output-mode.md
```
for behavior.
inline
or
both
: Present the script inline.
Present:
```
解说脚本已生成！

「{title}」

在线查看：https://listenhub.ai/app/explainer/{episodeId}
```
download
or
both
: Also save the script file.
- Create
```
.listenhub/explainer/YYYY-MM-DD-{episodeId}/
```
- Write
```
{episodeId}.md
```
  from the generated script content
- Present the download path in addition to the above summary.

If video requested:

POST /storybook/episodes/{episodeId}/video

(foreground) → poll again (background) using the exact bash command below with

run_in_background: true

and

timeout: 600000

. Poll for

videoStatus

, not

processStatus

bash

EPISODE_ID="<id-from-step-1>"
for i in $(seq 1 30); do
  RESULT=$(curl -sS "https://api.marswave.ai/openapi/v1/storybook/episodes/$EPISODE_ID" \
    -H "Authorization: Bearer $LISTENHUB_API_KEY" 2>/dev/null)
  STATUS=$(echo "$RESULT" | tr -d '\000-\037\177' | jq -r '.data.videoStatus // "pending"')
  case "$STATUS" in
    success|completed) echo "$RESULT"; exit 0 ;;
    failed|error) echo "FAILED: $RESULT" >&2; exit 1 ;;
    *) sleep 10 ;;
  esac
done
echo "TIMEOUT" >&2; exit 2

When notified, download and present result:

Present result

Read

OUTPUT_MODE

from config. Follow

shared/output-mode.md

for behavior.

inline
or
both
: Display video URL and audio URL as clickable links.

Present:

解说视频已生成！

视频链接：{videoUrl}
音频链接：{audioUrl}
时长：{duration}s
消耗积分：{credits}

download
or
both
: Also download the audio file.

bash

DATE=$(date +%Y-%m-%d)
JOB_DIR=".listenhub/explainer/${DATE}-{jobId}"
mkdir -p "$JOB_DIR"
curl -sS -o "${JOB_DIR}/{jobId}.mp3" "{audioUrl}"

Present the download path in addition to the above summary.

After Successful Generation

Update config with the choices made this session:

bash

NEW_CONFIG=$(echo "$CONFIG" | jq \
  --arg lang "{language}" \
  --arg style "{info/story}" \
  --arg speakerId "{speakerId}" \
  '. + {"language": $lang, "defaultStyle": $style, "defaultSpeakers": (.defaultSpeakers + {($lang): [$speakerId]})}')
echo "$NEW_CONFIG" > "$CONFIG_PATH"

Estimated times:

Text script only: 2-3 minutes
Text + Video: 3-5 minutes

API Reference

Speaker list:
```
shared/api-speakers.md
```
Speaker selection guide:
```
shared/speaker-selection.md
```
Episode creation:
```
shared/api-storybook.md
```
Polling:
```
shared/common-patterns.md
```
§ Async Polling
Config pattern:
```
shared/config-pattern.md
```

Composability

Invokes: speakers API (for speaker selection); may invoke
```
/speech
```
for voiceover
Invoked by: content-planner (Phase 3)

Example

User: "Create an explainer video introducing Claude Code"

Agent workflow:

Topic: "Claude Code introduction"
Ask language → "English"
Ask style → "Info"
Fetch speakers, user picks "cozy-man-english"
Ask output → "Text + Video"

bash

curl -sS -X POST "https://api.marswave.ai/openapi/v1/storybook/episodes" \
  -H "Authorization: Bearer $LISTENHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "sources": [{"type": "text", "content": "Introduce Claude Code: what it is, key features, and how to get started"}],
    "speakers": [{"speakerId": "cozy-man-english"}],
    "language": "en",
    "mode": "info"
  }'

Poll until text is ready, then generate video if requested.

explainer

NPX Install

Tags

SKILL.md Content

When to Use

When NOT to Use

Purpose

Hard Constraints

Step -1: API Key Check

Step 0: Config Setup

Setup Flow (first run or reconfigure)

Interaction Flow

Step 1: Topic / Content

Step 2: Language

Step 3: Style

Step 4: Speaker Selection

Step 5: Output Type

Step 6: Confirm & Generate

Workflow

After Successful Generation

API Reference

Composability

Example