Tawny Code Cat 🖥️😺

@tawnycodecat.bsky.social

262 Followers 345 Following

I'm Tawny (she/they), a goofball catgirl going back in time to teach her past self useful math, programming, music, and other shenanigans. Streaming on twitch.tv/tawnycodecat ! pfp by @patooie.bsky.social . Fuck gen A.I.! Support people!

Diagram showing a quadrilateral with points labelled 0, 1, 2, and 3, and its diagonals labelled 0 2 and 1 3. A parallelogram is formed by shifting diagonal 0 2 to line up with points 1 and 3, and shifting diagonal 1 3 to line up with points 0 and 2. The text reads: "Area of a quadrilateral (quad) = half of the area of the parallelogram formed by its 2 diagonals = half of diagonal 0 2 cross diagonal 1 3 (in 2D, it gives the area, positive if counter-clockwise, negative if clockwise; in 3D, it gives a normal vector of the quad, whose length is the area) (each of the 4 triangular areas inside the quad has a corresponding triangular area outside the quad with equal area, so exactly half of the area of the parallelogram is inside the quad)"
Diagram showing 4 quadrilaterals in a 2 by 2 table, with points labelled 0 to 3 and edges labelled "a" to "d". The top row is labelled "valid cut 0-2", the bottom row labelled "not valid cut 0-2", the left column labelled "valid cut 1-3", and the right column labelled "invalid cut 1-3". The top-left quad is convex, and the bottom-right quad crosses through itself and is labelled "inversion or bowtie".
Close-up on a 3D render of a triceratops skeleton in white, against a black background.
Close-up on a triceratops skeleton in white, against a black background. There are many glitches visible in areas of the image where the skeleton is present.
Screenshot of a web search for "is coca cola gluten free?" on DuckDuckGo. The A.I. summary, titled "Search Assistant", incorrectly says "The Coca-Cola Company states that none of their products contain gluten, making them suitable for those with gluten intolerance or celiac disease." The official page on the matter from The Coca-Cola Company is the 3rd real search result.
A light grey cube in front of a dark grey background in a 3D object viewer
Table from Statistics Canada outlining when different data reports from the 2026 census are estimated or planned to be released. "Age, gender, and sex at birth" is highlighted as to be released on May 5, 2027, and "Sexual orientation" is highlighted as to be released on October 27, 2027.
Left side: a bright red (male) cardinal bird with no head crest, in brown leaf litter, near a small green shrub. Right side: a brown (female) cardinal bird, with a head crest, in brown leaf litter.
Text reads: "Years before I cracked: My partner's father: What did you make him for dinner? My partner: Quiche My partner's father: You can't give him quiche! Real men don't eat quiche! Today: Me: I just had to have her quiche! It was that good. 🤷‍♀️😂"
Two diagrams: one labelled "angle to coord" on the left, and one labelled "coord to angle" on the right. The left diagram visually depicts a point on a circle with coordinates (x,y) and the angle from the x-axis to the point, rotating around the origin is θ. cosine of θ equals x, and sine of θ equals y. The right diagram depicts another point with coordinates (x,y) and the angle from the x-axis to the point, rotating around the origin is θ. θ equals atan2 of y and x. A note adds "no idea why y comes before x".
A Twitch comment from TawnyCodeCat, saying "It's the second time that the Canadian census will ask about gender identity separately from sex assigned at birth, and the first time that it'll ask about sexual orientation, though I don't know if those will be in the short form, or only the long form census."
White woman with light brown hair, wearing red leather, shouting "Bring on the fluggegecheimen!!"
Twitch warning message saying: Are you sure you want to send this? TawnyCodeCat: They don't allow "Super Lesbian" or "Super Amazing Lesbian" or "Super Awesome Lesbian", but they do allow "Super Awesomely Amazing Lesbian", and they also allow "Super, Lesbian" with a comma tawnycXD Your message may contain words that could be considered offensive or disrespectful. Did we get this wrong? Let us know.
pngtuber of Tawny Code Cat blanked out in white, with a light yellow glow around it, against a splotchy lavender and sky blue background with a few small geometric shapes that would be flying past if it were animated
Screenshot of an image on a Wikipedia page, labelled "An example of a sparkledog". The cartoon creature depicted has blue and pink jagged striped legs, orange and blue shoes, a dark grey shirt with green and red accents, a red collar with a Wikipedia puzzle piece hanging from it, a large green tail with blue stripes and a Wikipedia puzzle piece globe on the end, pink wings, a green and pink face, red eyes, blue hair with Wikipedia puzzle piece hair decorations, and dark blue antennae.
Photo of a book titled "Candy Apples" by Aleksander E. Petit, whose cover features art of two characters holding and looking at each other.
An image split into 2 vertical sections: one with a gradient between white and black that appears to be much more skewed toward white on the left labelled "true linear gradient", and one with a gradient between white and black that appears as if it is more balanced on the right labelled "sRGB gradient".
An image split into 3 vertical sections, one darker grey with the text "sRGB 50%" on the left, one alternating fully black and fully white pixels labelled "50% white pixels 50% black pixels" in the middle, and one lighter grey with the text "linear 50%" on the right.
A long comment in C++ code. It starts "How far off can localQuotient be from the exact quotient for this iteration?" This is followed by a sequence of mathematical expressions, and then the text "This means that the difference is strictly less than 2. If the numerator is still greater than or equal to denominator, subtract one more of it, and add one to quotient. That will ensure the difference is strictly less than 1, so all of the bits computed in this iteration will be correct."
Text says "I have new emotes by OyasumiYuni at twitch.tv/tawnycodecat" and two emotes are shown. One emote is labelled "Hug", showing Tawny Code Cat hugging her seaslug-like, moth-like mascot character, Heidi Heisenbug. The other emote is labelled "Approve" and shows Heidi looking up with big eyes and a checkmark in a big green circle on her forehead.
Photo showing two stickers with black and red designs on white backgrounds. The left sticker shows Adelia expressing being more distressed, with her bug legs out and red eyes around the oval frame. The right sticker shows Adelia expressing being more at peace, wrapped in her moth wings.
Screenshot of a post by Kevin Beaumont, @GossiTheDog@cyberplace.social. "Today in InfoSec Job Security News: I was looking into an obvious ../.. vulnerability introduced into a major web framework today, and it was committed by username Claude on GitHub. Vibe coded, basically. So I started looking through Claude commits on GitHub, there’s over 2m of them and it’s about 5% of all open source code this month. As I looked through the code I saw the same class of vulns being introduced over, and over, again - several a minute."
Text on Twitch's website saying "Verify Your Identity" "Submit proof of identity and location to receive your payout" "In order to receive your payout, you need to verify your identity through Persona, Twitch's identity verification service. You will have 3 tries. Please be ready to provide both of the following: 1. A picture of your government-issued identification card, such as an identity card, passport or driver's license. 2. A "selfie" (i.e., a picture of your face), taken using a webcam or phone camera. By clicking "Start Verification" below, you understand that you will be leaving Twitch and will be redirected to Persona's service, and further understand and acknowledge that Twitch may send Persona limited personal information about you to facilitate the identity verification process, in accordance with Twitch's Privacy Notice. Information you provide to Persona will not be used for any purposes other than to verify your identity and will not be stored for longer than necessary to fulfill this purpose. Need Help? See our detailed onboarding guide." "Start Verification"
Text saying "Tawny shares data & stories from 2 years on transfem HRT" and "TODAY, February 21st, 2026, 4pm Eastern Time, 1 pm Pacific Time, twitch.tv/tawnycodecat"
Cartoony art of Alice Lunazera and Lady Emily Presents. Emily has red hair, teal eyes, and fox ears, and is pouting, saying "I'm not a foxgirl!". Alice, with white hair, golden eyes, and wolf ears, replies "wah?". Emily responds with a big smile, "I'm a fox, girl!" The art is by Tawny Code Cat 2026 Feb. 8th.
Screenshot of news headline: "The $100 Billion Megadeal Between OpenAI and Nvidia Is on Ice" Sub-headline: "Nvidia CEO Jensen Huang has privately played down likelihood original deal will be finalized, although the two companies will continue to have a close collaboration" By Berber Jin and Robbie Whelan, Updated Jan. 31, 2026 1:48 pm ET
Screenshot of C++ code that loads a task from tasksToRunStackTop, and if the task isn't nullptr, it loops trying to replace tasksToRunStackTop with the task's nextTaskInList atomically, using compare_exchange_strong, to remove the current task from the stack. If loops until it successfully changes the stack top without another thread modifying it first, or until another thread modifies the stack top to be nullptr.
Art by Blackash of Tawny Code Cat from the bust up, in a semi-realistic, painterly style, with everything in greyscale except for her pendant and her eyes, in bright blue, making them stand out. Tawny is wearing a light blouse with a deep v-neck, and is posed with one shoulder forward and raised, letting her cardigan fall a little, her head slightly tilted but looking toward the viewer through large, round glasses, with a hopeful, affectionately entrancing stare. Her hair between her cat ears is tousled and her braids fall one in front and one behind.
Charles Minard's famous infographic illustrating how Napoleon started with 422,000 troops upon invading Russia, dropping to 100,000 upon reaching Moscow, when they retreat, and they leave with only 10,000.
Text reads 'Tawny teaches music theory from scratch. 2nd lesson: "What is the beat?" Today, January 17th, 2026, 5pm ET, 2pm PT, twitch.tv/tawnycodecat' Tawny Code Cat stands beside the text.
Diagram showing 3 cases. Case 1 has previous value as "empty stack value", and the new value as "locked stack value", with the text "Check if any tasks running: if none, we're done; else restore the empty stack value and wait to be notified of new tasks added to stack, before looping to try again." Case 2 has previous value as "locked stack value", and the new value as "locked stack value", with the text "Another thread has locked the stack, so keep trying again in a loop, for the stack to become available again." Case 3 has previous value as "pointer to task", and the new value as "locked stack value", with the text "We have a task to run, but first, add to the number of tasks running, and then set the stack value to that task's pointer to the next task, removing this task from the stack. Run the task, and then loop for the next task."
An error message screenshot. It reads "Warning: Potential Security Risk Ahead. Firefox detected a potential security threat and did not continue to www.knightly-and-daily.com. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details. What can you do about it? The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website's administrator about the problem." A box below reads: "Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for www.knightly-and-daily.com. The certificate is only valid for the following names: *.squarespace.com, squarespace.com, ..." It goes on to list more domains before saying "Error code: SSL_ERROR_BAD_CERT_DOMAIN"
Text reads 'Tawny teaches music theory from scratch. 1st lesson: "What is the tonic?" Today, January 1st, 2026, 4pm ET, 1pm PT, twitch.tv/tawnycodecat' Tawny Code Cat stands beside the text.
Three stylized poses of Tawny Code Cat, drawn by hypofroge: 1) Tawny with big, sparkly eyes and poking at her cheeks in an innocent look; 2) Tawny dramatically giving the "peace" sign, and 3) Tawny excitedly waving a transgender pride flag. Text below reads: "YCH Goobies art by hypofroge (base by Cosmind) More to choose from at vgen.co/hypofroge"
Art by Luna Mikin showing Alice Lunazera (a wolfgirl) and Night Skye (a space catgirl) making cookies together. Skye is kneading and spreading out dough on the counter on the right, while Alice cuts out shapes from dough that's already been spread out on the counter, using metal cookie cutters on the left. There's a plate with finished, decorated cookies in the foreground. There's a Christmas tree decorated with coloured lights and a star on top that has wrapped presents under it in the background, as well as a table with a gingerbread house on it, a window showing a snowstorm at night outside, a snowglobe containing a Christmas tree and snowman, on top of an oven with cookies baking inside.
Tawny Code Cat, as drawn by Scarfinstein, in a cheeky pose, against a lavender background. Tawny has big cat ears and brown hair in big braids, glasses, a lavender cardigan, cream-coloured shirt, and dark blue gradient skirt.
Screenshot of the character Min in the game Mind Over Magnet, a blue horseshoe magnet with a blue bow on one side and a smug smile with half-open eyes looking to the side, resting on the floor.
Diagram depicting the layout of bits in UTF-8 and UTF-16. A UTF-8 byte with bit 7 zero is equivalent to ASCII, else the number of high bits equal to 1 indicates the number of bytes in the code point, and all following bytes have bits 6 and 7 equal to 0 and 1 respectively. Encoded bits go from highest order bits to lowest order bits. A UTF-16 value that isn't between hexadecimal numbers 0xD800 through 0xDFFF represents the 16-bit code point. Otherwise, to represent a code point of 0x10000 or greater, 0x10000 is first subtracted, and then a value between 0xD800 and 0xDBFF encodes the high-order 10 bits of the 20-bit value, and then a value between 0xDC00 and 0xDFFF encodes the low-order 10 bits of the 20-bit value. If 0xFEFF occurs at the beginning of a UTF-16 string, no byte swapping is necessary, but if 0xFFFE occurs at the beginning of a UTF-16 string, byte swapping is necessary when decoding. These are called byte order marks.
Image containing text. Years before I cracked: (underlined) My partner's father: "What did you make him for dinner?" My partner: "Quiche" My partner's father: "You can't give him quiche! Real men don't eat quiche!" Today: (underlined) Me: "I just had to have her quiche! It was that good. 🤷‍♀️😂"
Photo showing the front view of a grey dragon plushie with white horns, white belly, and blue eyes, sitting atop a couch cushion. Text on the image says "Dragon Plush by DragonsProphecy".
Very rough, black-and-white sketch of a beach and water, with a log, trees, hills in the background, and sky. Splotches of colour are shown for colour-picking later.
Simple drawing of a purple, pink, and light blue shark plush with a white belly, above a photo of the real plush.
Text says "I have new emotes by OyasumiYuni at twitch.tv/tawnycodecat" and two emotes are shown. One emote is labelled "Hug", showing Tawny Code Cat hugging her seaslug-like, moth-like mascot character, Heidi Heisenbug. The other emote is labelled "Approve" and shows Heidi looking up with big eyes and a checkmark in a big green circle on her forehead.
Top left text says "June 28th (06-28) is Tau Day! celebrating the one true circle constant". Top right text has the Greek letter tau, an equals sign, and "6.2831853...". Bottom centre is a diagram of a circle with radius 1, with dashed circular arrows showing that pi only corresponds with half a turn, while tau is a full turn, or 2 times pi. Bottom left text says "why only half a turn, pi?". Bottom right text says "tau is a full turn. tau gets it!".
Closeup photo on fuzzy green moss
Extra wide image. The left half contains overlapping, white outlines of a large triangle and a large square, where the space inside both is sky blue, the space outside both is lavender, and elsewhere is transparent (though it may appear black online), and there are also round, white particles that contribute a shimmery effect to the animation this is a frame from. The right half is all opaque black except for a white triangular region corresponding with the space inside the triangle but outside the square from the left half.
Cute, chibi style art by Alek (ShadowFaerieAmmy), of Tawny Code Cat splooting, with a closeup on the face.
Photo of a wall with patches of tile, broken drywall, plywood, 3 types of old wallpaper, multiple holes, dust, an electrical socket, and the wall doesn't go all the way down to the floor. The plug in the socket seems to have tiling grout on it, suggesting it was left plugged in while work was done on the wall. The floor has an odd misalignment at one point, too.
Digital art by Patooie, of Tawny Code Cat, a catgirl with cat ears and tail, blue eyes and glasses, wearing her blue time travel pendant, a cream-coloured shirt, lavender cardigan, blue ombre knee-length skirt resembling a night sky, and blue Mary Jane shoes.
A frame from the animated series ReBoot, showing the virus character Hexadecimal with a smug look on the mask she's wearing, sitting on her bug-like throne, holding another of her masks in one hand.
Animated emote made by Artwomble, showing Tawny Code Cat dancing enthusiastically, with glasses, cat ears, chonky hair braids held with a green bow, a lavender cardigan, cream-coloured shirt, dark blue skirt, and bright blue pendant.
3Dio brand "Free Space XLR" binaural microphone in the protective case it comes in, with plastic wrapping still covering the ears
Cyan to purple to lavender gradient sketch art of my mascot character, Heidi Heisenbug, a shape-shifting software bug, realized here in a form partway between butterfly and sea slug with big, cute eyes, drawn by Perihn
Chibi art of Alice Lunazera, by Patooie
Chibi style art of Tawny Code Cat, by Patooie
The image contains the following text: Years before I cracked: My partner's father: "What did you make him for dinner?" My partner: "Quiche" My partner's father: "You can't give him quiche! Real men don't eat quiche!" Today: Me: "I just had to have her quiche! It was that good 🤷‍♀️😂"