Build Finished Product Ads with FLUX 3: A New Agent Skill

Where this fits

Your agent just generated a 30-second product spot with FLUX 3—great visuals, solid voiceover. But the client needs a finished ad: captions timed to speech, a claims-free copy that matches the footage, and no floating product shots. Doing that manually means stitching together generation, editing, and QC scripts. This skill packages that entire pipeline so your agent can go from raw FLUX 3 output to a broadcast-ready master without hand-holding.

Why agents benefit

• Deterministic assembly – Cuts, times, captions, and masters via exact computation, not LLM guesswork. The model handles creative generation; the skill handles everything that must be precise.
• Evidence-gated copy – Claims in the ad copy are checked against actual footage and generation metadata, preventing hallucinations about what the product does or looks like.
• Action-to-word sync – Voiceover lines are aligned to shot changes automatically, so the agent doesn't have to eyeball timestamps.
• Built-in QC gates – Catches clipped audio, floating products, off-model plates, and even false “pass” reports from earlier steps. If the build didn't pass, the agent knows.
• Length-aware rules – The skill explicitly distinguishes behavior for 12s, 30s, and 60s spots, so your agent won't apply a ten-second rule to a minute-long cut.

Practical scenarios

Scenario 1: From raw generate to client-ready spot

You've already run /v1/flux-3-video and have a 30-second clip. The agent invokes this skill to design the shot structure, write voiceover, and assemble captions—then runs QC to confirm no audio clipping before exporting.

Scenario 2: Iterating on a v2v continuation

The skill reads flux-3-keyframes-continuation to understand what a v2v link returns. Your agent can extend a 12-second base shot into a 60-second narrative, keeping continuity and re-syncing the voiceover automatically.

Scenario 3: Auditing a previous ad build

A teammate claims a spot passed QC. Your agent runs the skill's gates on the existing files and finds a floating product in frame 3 and a clipped word in the VO. The skill flags the false pass, saving you from shipping a broken ad.

Add it to your agent workflow

Install the skill with:

npx skills add black-forest-labs/skills --skill flux-3-product-ads

Then, in your agent's task definition, reference it like:

skills:
  - flux-3-product-ads

Your agent can now call the skill's functions to generate a product ad: it will fetch the correct FLUX 3 generation endpoints, run the deterministic assembly, and produce a QC report with evidence for any failures.

Compare before adopting

Before you commit, compare this skill against alternatives on four axes:

• Quality signals – Does it actually catch edge cases like off-model plates? Test with a known-bad render.
• Maintenance freshness – Check the GitHub repo for recent commits and issue resolution. A skill that lags behind FLUX 3 API changes is a liability.
• Alternatives – Could you build the same pipeline with a few shell scripts? If your needs are trivial, maybe. But this skill bundles domain knowledge (e.g., length-specific rules) that's hard to replicate.
• Workflow fit – Does it integrate with your existing agent framework? The npx install implies a standard skill registry, but verify it works with your orchestration layer.

Why it is worth tracking

This skill is from Black Forest Labs, the team behind FLUX 3, so it's likely to stay aligned with API updates and model capabilities. With 106 stars and active development, it's a solid bet for any agent that produces commercial video. Track it if you're building ad-generation workflows—it's the kind of tool that turns a “generate a clip” agent into a “ship a finished ad” agent. For a full overview, see the skill page on OpenAgentSkill. Evaluate it when you next need to produce a product spot end-to-end.