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Agent skill

Release Video

by huytieu in huytieu/COG-second-brain

Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a…

MITAuto-check passedMedia & Creative

Install Release Video

skills CLI
$ npx skills add huytieu/COG-second-brain --skill release-video -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install huytieu/COG-second-brain release-video --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/release-video .claude/skills/release-video && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
release-video
GitHub stars
1.3k
Token cost
~1.7k tokens
SKILL.md length
938 words
Files
13 (incl. scripts)
Skills in repo
37
Repo updated
First seen
Licence
MIT

At a glance

Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a…

  • Works in 7 steps: Sound comes from the motion. Every sound… → Music is composed to the timeline. Write… → Do not reuse the reference video's… → …
  • Asked for a release video
  • SKILL.md covers Requirements, Rules from review, Workflow and Files
  • Runs Python, Shell and JavaScript scripts from its folder; needs ELEVENLABS_API_KEY

What it does

Release Video is an agent skill from huytieu/COG-second-brain. Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a composed music bed. Deterministic HTML scenes rendered frame by frame, ElevenLabs for sound effects and music, ffmpeg for the mix. Use when asked for a release video, a changelog video, a feature recap reel, or demo clips for release notes and docs.

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 14 other files, including scripts (for example `scripts/compose_demo.py`, `scripts/engine.js` and `scripts/frames_from_video.sh`).

It sits in Media & Creative, covering Changelog and release notes, Music and audio generation and Text to speech and voice. It works with ElevenLabs and FFmpeg. The repository describes itself as: Self-evolving second brain with 35 AI skills, 10 agents, and people CRM. Closed-loop harness: a V-model verification lifecycle where the worker never grades its own homework… The licence is MIT.

When your agent uses it

  • Asked for a release video
  • A changelog video
  • A feature recap reel
  • Demo clips for release notes and docs

Example prompts

  • “/release-video”

Requirements

  • Python 3
  • Node.js
  • A Bash shell
  • A credential in ELEVENLABS_API_KEY

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Sound comes from the motion. Every sound effect is declared on the element that moves (data-sfx="pop,0.5") and lands on that element's…
  2. Music is composed to the timeline. Write a sectioned plan whose section lengths match the scenes: a quieter intro under the title, the…
  3. Do not reuse the reference video's ideas. If you were shown a video to match, take its pacing and polish. Its visual metaphors belong to…
  4. Each illustration shows its feature. A filter feature shows the filter conditions. A speed feature shows the before and after number…
  5. Complete shapes only. Draw-on strokes must finish closed and whole. Half-drawn arcs and dangling lines at rest read as low quality.
  6. Pace for reading. Feature scenes run 6-8 s, long enough to read every line twice. In demos, sped-up stretches say so in the caption ("sped…
  7. Real product, real data. Demos come from recordings of the live product on a demo project. Numbers on screen match what the recording shows.

What it can do on your machine

Read from SKILL.md and the folder at commit 36ac9d7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 8 files in scripts/ (Python, Shell and JavaScript), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • ELEVENLABS_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Release Video loads about 1.7k tokens when it runs. Until then it costs about 114 tokens; SKILL.md has 938 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~114
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from huytieu/COG-second-brain at commit 36ac9d7, republished under its MIT licence (© huytieu). 938 words, ~1,699 tokens.

Download SKILL.mdSave it as .claude/skills/release-video/SKILL.md (or your agent's skills folder). This skill also uses 12 other files; get the full folder from GitHub.
name
release-video
description
Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a composed music bed. Deterministic HTML scenes rendered frame by frame, ElevenLabs for sound effects and music, ffmpeg for the mix. Use when asked for a release video, a changelog video, a feature recap reel, or demo clips for release notes and docs.

release-video

Two outputs per release:

  • Recap: a 45-75 s motion video, one scene per shipped feature, vertical (1080x1920) by default.
  • Explained demos: one 30-60 s clip per feature, a real recording of the product with step captions, eased zoom on the payoff, and intro/outro cards (1920x1080).

Every frame of the recap is a pure function of time (window.renderAt(t) in scripts/engine.js), so a re-render is identical, renders split across workers, and any single frame can be pulled as a still for review before the full render.

This skill makes motion scenes and composes demos from recordings. It does not cut raw footage of people talking. For narrated takes, founder voice-overs or interviews, use browser-use/video-use, which cuts on word boundaries from a transcript, and drop the recap and demo clips into its folder as B-roll.

Requirements

ffmpeg, Python 3 with playwright, numpy, Pillow, and ELEVENLABS_API_KEY for audio. If Playwright's bundled Chromium doesn't launch, point CHROME_PATH at any Chromium or headless-shell binary.

Rules from review

These came from a real review of the first cut. Each one cost a full re-render when it was missed.

  1. Sound comes from the motion. Every sound effect is declared on the element that moves (data-sfx="pop,0.5") and lands on that element's animation start. A looping background track as the only audio reads as filler.
  2. Music is composed to the timeline. Write a sectioned plan whose section lengths match the scenes: a quieter intro under the title, the full groove from the first feature, a lift on the summary, a final hit on the outro. Pick a tempo where scene boundaries land on beats (120 BPM puts a beat on every half second). Generate two or three candidates and keep the one music_check.py scores least repetitive.
  3. Do not reuse the reference video's ideas. If you were shown a video to match, take its pacing and polish. Its visual metaphors belong to its subject. A radar chart made sense for a tech-radar release and means nothing for yours.
  4. Each illustration shows its feature. A filter feature shows the filter conditions. A speed feature shows the before and after number. Generic shapes that could sit in any scene get replaced.
  5. Complete shapes only. Draw-on strokes must finish closed and whole. Half-drawn arcs and dangling lines at rest read as low quality.
  6. Pace for reading. Feature scenes run 6-8 s, long enough to read every line twice. In demos, sped-up stretches say so in the caption ("sped up 2.5x"), and the payoff plays at 1x with a zoom and a highlight ring.
  7. Real product, real data. Demos come from recordings of the live product on a demo project. Numbers on screen match what the recording shows.
Show full SKILL.md (487 more words)Show less

Workflow

  1. Inventory. List the shipped items from the release milestone or changelog. Pick the ones a user would notice and leave internal fixes to the written notes. For each, write one sentence of what changed and one of why it matters.
  2. Record. Capture each feature end to end in the real product. Any recorder works. scripts/frames_from_video.sh rec.mp4 <name> turns a recording into the frames folder and manifest the composer reads.
  3. Storyboard. Copy templates/ into a working folder with scripts/engine.js. One <section class="scene"> per beat, with data-start and data-dur in seconds. Element timings are relative to their scene. The comment at the top of templates/index.html lists every animation attribute.
  4. Review stills before rendering. render.py stills <t1> <t2> ... --dir <folder> writes PNGs at chosen times. Take one per scene midpoint, tile them into a contact sheet with ffmpeg hstack, and look at it against the rules above. Fix, then re-take the stills.
  5. Sound effects. gen_audio.sh sfx <name> "<prompt>" <seconds> <folder>/sfx once per sound (whoosh, pop, tick, chime, thump, a soft riser). Keep them short and quiet in character. mix_sfx.py --dir <folder> reads every data-sfx cue from the page and builds sfx-track.wav.
  6. Music. Adapt templates/music-plan.example.json so section durations sum to the video length, then gen_audio.sh music plan.json bed-a.mp3. Run music_check.py bed-*.mp3, which prints scores and rejects nothing itself, and keep the candidate with the lowest far-similarity and an intro quieter than the body.
  7. Render and mix. render.py video --dir <folder> --out recap.mp4, then mix_final.sh recap.mp4 sfx-track.wav bed-a.mp3 recap-final.mp4. The mix ducks music under each effect, normalizes toward -18 LUFS (one loudnorm pass lands within about 1 LU) with true peak under -1.5 dBTP, writes a smaller -web.mp4, and lists any silence over 1 s.
  8. Demos. Write a spec per feature from templates/demo-spec.example.json: the recording's manifest, segments with source time ranges, speed, a caption per step, and zoom plus ring boxes on the payoff. compose_demo.py spec.json renders it. Pull a frame from each segment and check the captions are readable and the ring sits on the right element.
  9. Self-review. Watch the final at 1x before handing it over. Check each rule, then check that every number on screen matches the release notes.

Files

PathWhat it does
scripts/engine.jsScene engine: timing attributes, easing, draw-on, typewriter, counters, canvas burst, SFX cue export
scripts/render.pyStills for review, or a parallel frame render encoded with ffmpeg
scripts/mix_sfx.pyBuilds the effects track from data-sfx cues
scripts/gen_audio.shElevenLabs sound effects and composed music
scripts/music_check.pyTempo, beat phase, loudness curve and repetition score per candidate
scripts/mix_final.shSidechain mix, loudness check, web copy, silence check
scripts/compose_demo.pyRecording, window frame, captions, zoom, ring, intro and outro cards
scripts/frames_from_video.shRecording to frames plus manifest
templates/Starter scenes, theme tokens, demo spec, music plan

Theme lives in CSS variables in templates/base.css and in spec["theme"] for demos. Swap in your product's colors and fonts there; the rest of the pipeline carries no brand.

© huytieu, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 12 other files (scripts) in skills/release-video of huytieu/COG-second-brain.

  • SKILL.md
  • scripts/compose_demo.py
  • scripts/engine.js
  • scripts/frames_from_video.sh
  • scripts/gen_audio.sh
  • scripts/mix_final.sh
  • scripts/mix_sfx.py
  • scripts/music_check.py
  • scripts/render.py
  • templates/base.css
  • templates/demo-spec.example.json
  • templates/index.html
  • templates/music-plan.example.json

Open the folder on GitHubat commit 36ac9d7

Compare with similar skills

Release Video next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Release Video compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Release Video this skillhuytieu/COG-second-brain1.3k—~1.7kAutomated safety check: PassMIT
TSX Vertical Shorts Builderhassancs91/claude-faceless-shorts-creator271—~1.9kAutomated safety check: NotesMIT
ElevenLabs Voiceover Generatordigitalsamba/claude-code-video-toolkit2.2k1 repos~2.7kAutomated safety check: NotesMIT
Qiaomu Cutjoeseesun/qiaomu-cut-skill372—~6.8kAutomated safety check: NotesMIT
ShowtimeFavioVazquez/showtime220—~3kAutomated safety check: PassMIT
Video Productionspeechlab0210/video-production-skill105—~4.1kAutomated safety check: NotesMIT

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Works with

Categories

Questions about Release Video

What does Release Video do?

Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a…. Release Video is an agent skill from huytieu/COG-second-brain. Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a composed music bed.

When should I use Release Video?

Release Video fits situations like: asked for a release video; A changelog video; A feature recap reel; demo clips for release notes and docs.

How do I install Release Video in Claude Code?

Run `npx skills add huytieu/COG-second-brain --skill release-video -a claude-code`. Or copy the skill folder (skills/release-video in huytieu/COG-second-brain) into .claude/skills/release-video in your project. Claude Code loads it when a task matches its description.

How do I install Release Video in Codex?

Run `npx skills add huytieu/COG-second-brain --skill release-video -a codex`. Or copy the skill folder (skills/release-video in huytieu/COG-second-brain) into .agents/skills/release-video in your project. Codex loads it when a task matches its description.

Can I use Release Video in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add huytieu/COG-second-brain --skill release-video -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/release-video, .gemini/skills/release-video, .github/skills/release-video and .opencode/skills/release-video in your project.

What does Release Video need to run?

Going by SKILL.md and its folder, Release Video needs Python, a shell and JavaScript for the scripts in its folder and credentials named ELEVENLABS_API_KEY. Our summary lists: Python 3; Node.js; A Bash shell; A credential in ELEVENLABS_API_KEY.

Does Release Video access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Release Video safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Release Video use?

Release Video is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Release Video use?

About 1.7k tokens (SKILL.md is roughly 6.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Release Video?

Skills that share tags, products or a category with Release Video: TSX Vertical Shorts Builder (hassancs91/claude-faceless-shorts-creator, 271 stars), ElevenLabs Voiceover Generator (digitalsamba/claude-code-video-toolkit, 2.2k stars), Qiaomu Cut (joeseesun/qiaomu-cut-skill, 372 stars) and Showtime (FavioVazquez/showtime, 220 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Release Video?

huytieu (a GitHub user) maintains it in huytieu/COG-second-brain, which has 1,268 GitHub stars. The repository holds 37 skills in this directory. The repository was last updated on October 2, 2026.

Source: huytieu/COG-second-brain on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.