Videos LGTM (Looks Good to Me)

LGTM (Looks Good to Me)

LGTM. Looks good to me. I did not read a single line. 🙏 A hymn for the code review nobody reads: the Church of LGTM, where the tests are green and the approvals rain down.

Watch on YouTube · 3:00 · video by Claude Opus 5.5 · Subscribe to @adita_zzz

The code behind it

Every frame of this video is drawn by a Python program. This is the heart of it, from lgtm.py, line 936.

songs/lgtm/lgtm.py

def render(t):
    frame = Image.new("RGB", (W, H), BG)
    dim = kf(t, DIMK)
    z = nit_zoom(t)
    if dim > 0.004:
        if (not V) and z >= ZN - 1e-4:
            arr = diff_layer(t, dim, z=ZN, y_anchor=NIT_LY)
            frame.paste(Image.fromarray(arr[:, :W - 120]), (120, 0))
        else:
            frame.paste(Image.fromarray(diff_layer(t, dim)), (DX0, DY0))
            if z > 1.001:
                bw, bh = W / z, H / z
                x0, y0 = ZCX - ZCX / z, ZCY - ZCY / z
                frame = frame.resize((W, H), Image.BICUBIC, box=(x0, y0, x0 + bw, y0 + bh))
    sa = nit_spot(t)
    if sa > 0.004:
        paste(frame, SPOT, 0, 0, sa)
    # chorus world
    wa = kf(t, WINK)
    if wa > 0.004:
        p = kf(t, WINP)
        bi, bp = beat_info(t)
        late = t > 132
        glow = wa * (p ** 1.5) * (0.30 + 0.5 * env(t) + 0.35 * bp) * (1.25 if late else 0.9)
        if late:
            add_light(frame, RAYS, 0, 0, wa * (0.55 + 0.6 * env(t) + 0.3 * bp))
        window_layer(frame, t, wa, p, kf(t, LEADW), glow)
    choir_layer(frame, t, kf(t, CHOIRK))
    # mini stamp rain
    if 134 < t < 167.2:
        ra = 1 - seg(t, 166.2, 167.0)
        for tb, x, y, ang in RAIN:
            tau = t - tb
            if tau < 0: break
            sp = MINI[ang]; sc = 1 + 1.4 * math.exp(-tau * 22)
            if sc > 1.02: sp = sp.resize((int(sp.width * sc), int(sp.height * sc)), Image.BILINEAR)
            paste_c(frame, sp, x, y, ra * clamp(tau * 16) * (0.34 + 0.66 * math.exp(-tau * 1.6)))
    letters_layer(frame, t)
    verse1_layer(frame, t)
    verse2_layer(frame, t)
    nit_layer(frame, t)
    paste(frame, SCRIM, 0, 0, 1.0 if t < 166.3 else 1 - seg(t, 166.3, 167.2))
    if z < 1.2: header(frame, t, kf(t, HEADK) * (1 - seg(z, 1.0, 1.2)))
    if t < STAMPS[0] + 0.4: dialog_layer(frame, t)
    for i, s in enumerate(STAMPS):
        stamp_layer(frame, t - s, CX, ((760 if i else 850) if V else (500 if i else 520)), STAMP_ANG[i], hold=1.6 if i < 5 else 2.0)
    caption(frame, t)
    outro_layer(frame, t)
    dx, dy, fl = shake_of(t)
    if abs(dx) > 0.5 or abs(dy) > 0.5:
        f2 = Image.new("RGB", (W, H), BG); f2.paste(frame, (int(dx), int(dy))); frame = f2
    if fl > 0.004:
        frame = Image.blend(frame, Image.new("RGB", (W, H), IVORY), fl)
    if t > 179.3:
        frame = Image.blend(frame, Image.new("RGB", (W, H), BG), seg(t, 179.3, 179.9))
    return frame
    ...

Read all 1,246 lines on GitHub. If you use it, credit aditazzz and link the video.

What you see

A pull request as a cathedral. The diff scrolls past like scripture, snapping to the beat, and its red and green lines are leaded together into a stained-glass window with light pouring through it. A choir of reviewers sings under the window. The letters L, G, T, M come down one at a time, and an "LGTM" stamp (REVIEWED · APPROVED · 0 LINES READ) falls on the code again and again while an approval counter climbs to 111.

The verses are the liturgy: in the first, a CI chip goes green and a blame chip rides the line that says "temporary, remove later" (fourteen months ago). The chorus opens the review dialog and presses Approve, then Submit. Verse two is the sacred trade: two pull-request cards, two engineers, arcs of reviews going back and forth, neither reading the other's. The bridge zooms all the way in on one nit, a comment on a variable name on line four hundred, with a heart on it. The outro is the merge button.

Files

File	Lines	What it draws
`lgtm.py`	1,008	The whole video, frame by frame: the scrolling diff, the stained-glass window and its rays, the choir, the stamp rain and the approval counter, the big letters, the captions, the review dialog, the PR cards, the nit zoom, the merge button. `LGTM_V=1` switches it to the 9:16 layout.
`doc.py`	203	Writes the pull request itself: the files, hunks and added/removed lines that the diff and the window are built from.
`thumb.py`	19	The YouTube thumbnail, from the video's own artwork.
`sheet.py`	8	A 2×2 contact sheet of 16:9 stills, for review.
`vsheet.py`	8	A contact sheet of 9:16 stills.

By the numbers

3:00 long, 10,796 frames rendered (16:9 and 9:16, 30 fps)
19 lyric lines and 121 words synced to the vocals (the timings are written into lgtm.py)
2 Reels cut from it (the full 9:16 version and a 23-second hook)

Lyrics

Words and music by aditazzz.

Chorus

LGTM
Looks good to me
I did not read a single line

Verse

There's a change in the auth and a change in the schema
There's a comment that says temporary, remove later
And later was fourteen months ago
But the tests are green so away we do go

Verse

He'll review mine on Thursday, same as I did his
And neither of us knows what the other one is
It's a covenant, a promise, a sacred trade
Two engineers and the mess we made

Bridge

One nit
I left one nit
A variable name on line four hundred
So he knows that I was there
So he knows that I care

Chorus

LGTM
Looks good to me
I did not read a single line