Pixel GIF Maker Skill

The most-reacted message in any Slack channel is never the status update — it's the GIF. This skill makes custom ones in a retro pixel style: your words, four animations, eight colors, and a file small enough to drag anywhere. The whole encoder is a bundled pure-stdlib Python script — this library's calculators are dependency-free and deterministic, and so is its confetti.

What This Skill Produces

• A .gif file (GIF89a, looping) with the user's text in chunky 5×7 pixel type
• One of four animations: scroll (marquee), pulse (heartbeat zoom),

party (hue-cycling text + confetti), sparkle (twinkling stars)

• Sized for chat: typically 10–60KB, well under any upload limit

Required Inputs

Ask for (if not already provided):

• The text — under 24 characters; pixel fonts are for punchlines

("SHIP IT", "1000 STARS", "GG TEAM", "V63 IS LIVE"). Type * for a ♥.

• The mood → mode: victory lap = party · announcement = scroll ·

emphasis = pulse · appreciation = sparkle

• Optional: colors (night, plum, teal, mint, gold, coral, white, ink, violet)

and --scale 1-4 (default 3)

Process

1. Run the bundled script — no installs, Python 3 stdlib only:

bash python3 scripts/pixel_gif.py --text "SHIP IT" --mode party --out shipit.gif python3 scripts/pixel_gif.py --text "GG TEAM *" --mode sparkle --fg gold --bg night --out gg.gif python3 scripts/pixel_gif.py --self-test # verify all four modes, print hashes

1. Uppercase renders best (the font is A–Z, 0–9, and common punctuation; unknown

characters become ? — warn the user rather than surprise them).

1. Same arguments + same --seed → byte-identical file; change --seed to

reshuffle confetti/star positions.

1. Hand back the file path and one line on which mode was chosen and why.

Output Format

The .gif itself, plus:

🎉 shipit.gif — 159×57, 10 frames, party mode (confetti for a launch).
Drag it into Slack. Want it calmer (sparkle) or bigger (--scale 4)?

Quality Checks

• ] Text length checked BEFORE generating — over 24 characters, ask them to cut

(offer the punchline edit: "SHIPPED THE MIGRATION" → "SHIPPED IT")

• ] Mode matches the moment — a layoff-week channel does not get confetti;

when in doubt, sparkle

• ] Script ran without error and the reported file size is under ~200KB
• ] Any character outside the font set was flagged to the user, not silently

turned into ?

Anti-Patterns

• ] Do not reach for image libraries or external services — the point of the

bundled encoder is zero dependencies and deterministic output

• ] Do not generate GIFs containing colleagues' names in mocking contexts —

celebration tool, not a roast tool; decline and suggest the kind version

• ] Do not cram sentences in — if the user insists past 24 characters, use

scroll mode and say why

• ] Do not promise Slack emoji-size rendering — this makes message GIFs;

custom emoji have their own size rules the user handles in Slack settings