Video Generation (AI SDK)

Tuzi API video generation backend. Default model: veo3.1.

Script Directory

Agent Execution:

1. SKILL_DIR = this SKILL.md file's directory
2. Script path = ${SKILL_DIR}/scripts/main.ts

Step 0: Load Preferences ⛔ BLOCKING

CRITICAL: This step MUST complete BEFORE any video generation. Do NOT skip or defer.

0.1 Check API Key

echo "${TUZI_API_KEY:-not_set}"
grep -s TUZI_API_KEY .tuzi-skills/.env "$HOME/.tuzi-skills/.env"

Result	Action
Key found	Continue to Step 0.2
Key NOT found	⛔ Run API key setup (see references/config/first-time-setup.md) → Store key → Then continue

0.2 Check EXTEND.md

test -f .tuzi-skills/tuzi-video-gen/EXTEND.md && echo "project"
test -f "$HOME/.tuzi-skills/tuzi-video-gen/EXTEND.md" && echo "user"

Result	Action
Found	Load, parse, apply settings
Not found	⛔ Run first-time setup (references/config/first-time-setup.md) → Save EXTEND.md → Then continue

Path	Location
.tuzi-skills/tuzi-video-gen/EXTEND.md	Project directory
$HOME/.tuzi-skills/tuzi-video-gen/EXTEND.md	User home

EXTEND.md Supports: Default model | Default seconds | Default size

Schema: references/config/preferences-schema.md

Usage

# Single video
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "A cat walking in a garden" --video cat.mp4

# With model and duration
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "城市夜景延时" --video city.mp4 --model veo3 --seconds 8

# With reference image
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "Animate this scene" --video out.mp4 --ref source.png

# From prompt file
npx -y bun ${SKILL_DIR}/scripts/main.ts --promptfiles prompt.md --video out.mp4

# Long video (multi-segment with ffmpeg concat)
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "A journey through seasons" --video long.mp4 --segments 3

# Long video with per-segment prompts
npx -y bun ${SKILL_DIR}/scripts/main.ts --video long.mp4 --segments 3 --segment-prompts seg1.md seg2.md seg3.md

Options

Option	Description
--prompt <text>, -p	Prompt text
--promptfiles <files...>	Read prompt from files (concatenated)
--video <path>	Output video path (required)
--model <id>, -m	Model ID (default: veo3.1)
--seconds <n>, -s	Duration in seconds
--size <WxH>	Video size (e.g., 1280x720, 16x9)
--ref <files...>	Reference images
--ref-mode reference|frames|components	Reference image mode
--segments <n>	Long video segment count (min 2)
--segment-prompts <files...>	Per-segment prompt files
--json	JSON output

Models

Model	Provider	Duration	Sizes	Image Mode
veo3	Veo	8s	16:9, 9:16	reference
veo3.1 (default)	Veo	8s	16:9, 9:16	frames
veo3.1-4k	Veo	8s	4K	frames
sora-2	Sora	10/15s	16:9, 9:16	reference
sora-2-pro	Sora	10/15/25s	16:9, 9:16, HD	reference
kling-v1-6	Kling	5/10s	16:9, 9:16, 1:1	reference
seedance-1.5-pro	Seedance	5/10s	1080p, 720p	frames

Long Video Mode

When --segments N is specified (N >= 2):

1. Generates N video segments sequentially
2. After each segment, extracts last frame via ffmpeg
3. Last frame becomes next segment's reference image (continuity)
4. All segments concatenated via ffmpeg -f concat
5. Temporary files cleaned up

Requirements: ffmpeg must be installed.

Per-segment prompts: Use --segment-prompts to provide individual prompt files for each segment. If fewer files than segments, remaining segments use the main --prompt.

Environment Variables

Variable	Description
TUZI_API_KEY	Tuzi API key (https://api.tu-zi.com)
TUZI_VIDEO_MODEL	Default video model (default: veo3.1)
TUZI_BASE_URL	Custom Tuzi endpoint (default: https://api.tu-zi.com)

Load Priority: CLI args > EXTEND.md > env vars > <cwd>/.tuzi-skills/.env > ~/.tuzi-skills/.env

Model Resolution

Priority (highest → lowest):

1. CLI: --model <id>
2. EXTEND.md: default_model
3. Env var: TUZI_VIDEO_MODEL
4. Built-in default: veo3.1

Agent MUST display model info before each generation:

• Show: Using [model]
• Show switch hint: Switch model: --model <id> | EXTEND.md default_model | env TUZI_VIDEO_MODEL

Error Handling

• Missing API key → ⛔ MUST run API key setup from Step 0.1
• Generation failure → auto-retry once
• Business failure (content rejected) → no retry, report error
• Network error → exponential backoff (1.5x, max 60s)
• Timeout → error after 90 minutes
• Missing ffmpeg (long video mode) → clear error with install instructions

Extension Support

Custom configurations via EXTEND.md. See Step 0 for paths and supported options.