Build me a Claude Code skill called "life-constellation" that makes a vertical video of a whole life told as lines of light: every person is a glowing line climbing a starry sky with my age, people join and leave, the ones who die rise and become stars, and at the end the stars join into a constellation. Work in phases and stop for my approval where I say so.

SETUP
- Check that I have Node and ffmpeg. Install only what's missing, and tell me first.
- Make the video with HyperFrames (npx hyperframes init <folder>): it renders an HTML page to MP4 frame by frame. 1080x1920, 30 fps.

1. THE CAST (stop for my approval)
- Ask me who is in my story and in which language the names should be. If I don't want to use real people, use this default cast: Grandma, Grandpa, Mom, Dad, Me, Kindergarten friend, Grade school friend, Childhood friend, Middle school friend, First love, High school friend, College friend, Coworker, Wife, Son.
- For each person: the name shown on screen, a colour, and what happens to them:
  - FAMILY: already there before I'm born.
  - JOINS: arrives at age X and stays (partner, child, best friend).
  - CROSSES: passes through at age X and is gone a second later (school friends, a coworker).
  - LEAVES: moves away at age X (the line bends off the side of the screen).
  - BECOMES A STAR: dies at age X.
- Show me a table (name, colour, from age, to age, what happens) and wait for "ok".

2. THE CLOCK
- The camera follows my age. Map video time to age: about 2 s before I'm born up to age 85 in 116 s. Slow at the start, faster through the quiet middle years, slower again near the end.
- Keep it as a table of ages every 0.1 s, so every event can be placed on an exact second.

3. THE SKY (everything in one canvas)
- Every frame is a pure function of time: no timers, no requestAnimationFrame, no unseeded random. Listen to HyperFrames' "hf-seek" event and draw the frame for that time.
- Background: deep navy gradient, a few soft purple nebula clouds, about 500 small stars from a seeded random.
- A "now" line at 52% of the height. An age axis on the left: a tick every 5 years, the current age in yellow, the word "age" top left.
- 80 px = 1 year. Each person is a path in (age, x) space, drawn at y = nowY + (currentAge - age) x 80, so their past scrolls down under them. Fade the lines out in the bottom 25% of the screen.
- Draw each line in 3 passes (a wide faint glow, a medium glow, a bright 3 px core) in the person's colour. The head is a white glowing dot with the name just above it. If two names would touch, slide the second one sideways (small overlap) or move it a line out (big overlap), so no name ever sits on another.
- Family drifts in soft S-curves between keyframes, plus a tiny sine wobble so it looks alive. People who cross are straight diagonal lines that take about 3 s to cross the screen, slow enough to read their name, which sits under their line, clear of the family's names. They're dimmer and their trail fades a few seconds later.
- Becoming a star: the line bends sideways and stops, a spark with a dotted tail rises to a fixed spot in the sky in about 1.5 s, a ring flashes, and it stays as a small 4-point star with its name. Spread the stars around the top half so the final shape reads well.

4. THE ENDING
- I go last: my head flares with a big warm bloom and becomes the biggest star, right where I stand. The axis and the old lines fade out.
- My child keeps going: their line keeps climbing past the now line. Life goes on.
- Thin lines draw one by one between the stars: me, my partner, my mother, my grandmother, my grandfather, my father, back to me.
- At about 75% of the height, fade in "Life is a journey" in a classic serif, with a thin rule and, in italics: "Some walk with you for a while. Others stay in your sky forever."
- Finish with a 1.2 s fade to black.

5. CHECK (stop for my approval)
- Take a snapshot at every event (each arrival, each goodbye, each star, the ending). Check it yourself first: names overlapping, text cut off, a star hidden behind a name. Fix and check again (max 3 rounds), then show me the frames and a preview link. Wait for "render" or my changes.

6. RENDER
- Render 1080x1920 MP4 with no music: I'll add the song from Instagram's own library. Verify the length.

Save the whole workflow as the skill, so next time I just say: "make a life constellation" and give you the names.