Changelog

Week of Sep 21–27

• Team chats now have their own Chats tab in the sidebar, alongside a Docs tab, with channels and team members moved into it

• Each chat channel can now have its own icon — pick one from a searchable set of 214 icons, and new channels start with a default

• The Docs tab now opens with a Recent documents card showing your three most recently opened documents, with Show more expanding to ten

• The line options menu in the gutter now includes Copy, Cut and Insert Math; Cut is hidden when the document has only one line

• Suggestions no longer appear inside a locked block, so a locked expression stays untouched while clipboard and collapse actions keep working

• Claude no longer cuts long answers short — code-heavy replies come back in full — and a faster default model makes responses quicker

• The AI now notifies you when it finishes an answer rather than when it starts, so the notification arrives with the reply ready

• File cards inside narrow table cells now shrink gracefully: the size and extension drop away first, then the name, leaving a centered download button

• Sign-in emails now use Corca's own template, and resending a verification link is rate-limited

• Importing a PDF now tells you when an upload fails instead of doing nothing, and accepts documents up to 200 pages

• Fixed the unread message badge showing a stale count

Week of Sep 14–20

• Right-clicking a math selection now opens a tidied menu: powers and roots live under Exponent, accents under Hat, spanning decorators under Bar, crossing-out ones under Cancel, and function brackets under Brackets

• Start typing with the menu open and a search field filters the actions — "square" finds Square inside the Exponent submenu without opening it, and Backspace brings the whole menu back

• Selecting one or more expressions and choosing Make a Graph now appends a graph of them

• Right-clicking empty space now offers Insert Math, which drops an empty expression where you clicked with the cursor in it

• Selecting a variable or constant now offers Color in the menu, and picking a color updates every occurrence of it

• A variable that carries parameters now offers Detach Argument to pull them back out, and a bare variable followed by a group offers Merge as Argument to fold it in

• Indexes and labels now sit in their own Labels section, including the corner positions and the Prime, Double Prime, Triple Prime and Dagger symbols, together with the Move to actions

• Contents of an exponent can now be moved back down into the expression with Move Down

• The math menu now opens with Ctrl+Space or Alt+Space, lists clipboard actions even when they don't apply, and skips disabled rows when you arrow through it

• You can now lock an individual block from the line options menu, keeping one paragraph, table or expression fixed while the rest of the document stays editable

• Improved math recognition when importing large PDFs and images

• Interactive controls in code cell output — sliders, dropdowns and checkboxes — have been removed for now, and those outputs render as plain HTML again

• Mobile: team chats are now available in the app

• Mobile: modals can be dismissed by dragging them down

Week of Sep 7–13

• You can now import PDF files; Corca reads each page, including math that was saved as an image, and turns it into an editable document

• Team settings now have an Invite links section, and each click on Create Invite Link makes a new link

• Mentioning someone outside the team in a team chat now says they aren't a member and won't be notified; clicking Invite sends them a team invite and opens the Members tab

• Right-clicking in a document you can't edit now opens your browser's own menu, so you can still copy text

• AI writing into a document is noticeably faster, and if the AI provider fails, Corca retries and shows a failed state instead of hanging

• Notification timestamps now keep updating while the notifications panel is open

• Improved accessibility: higher-contrast symbols in the symbol palette, screen reader labels on table, code, chart and upload controls, and keyboard access to collapsed sidebar menus

• Logging in from a daily challenge page now brings you back to it, and no longer sends you there after an unrelated login

• Mobile: tapping a math expression now just places the cursor, and double-tapping selects the variable

• Mobile: a notifications button in the document tree opens your notifications, with a badge that updates live

• Mobile: new document buttons in root folders, Undo and Redo that grey out when there's nothing to undo, and the About and What Is Corca? pages now open inside the app

Week of Aug 31–Sep 6

• You can now type @ in a document or a chat to mention someone; a picker lists teammates and people the document already knows, and Enter inserts a blue chip that links to their profile

• Hovering a mention shows a card with the person's name and avatar; if they can't open the document the chip turns grey and offers a one-click Invite

• Mentioning someone in a chat comment now notifies them right away — even if they have already read that chat — and the notification opens straight to that message; editing or deleting the comment takes the notification back

• Selected text can now be linked to a math variable from the right-click menu: the phrase takes on the variable's color, and hovering or clicking either one highlights the other

• The right-click menu now has a Change Notation submenu that previews other ways to write the selected expression and swaps it in when you pick one

• Simplify, Expand, Factor and the other symbolic actions now live in their own right-click submenu

• Hints for expressions like sin^2(y)-cos^2(y) now read -cos(2*y) instead of -cos(2,y)

• A selected image can now be wrapped in a callout block from the IMAGE panel, with a color picker for the callout background

• Duplicating a document from the sidebar now names the copy Document title [Your Name copy] so copies stay attributable; Cmd+Z restores the original title

• Team invites now accept several addresses at once — paste a comma-, semicolon- or newline-separated list and send them all with one "Invite all" click

• You can now upload .md, .tex and .txt files to the AI chat; the AI reads them as text and can import LaTeX as formatted math

• Recognizing text from an image now works on a document you left open for a while, without a page refresh

• The notifications panel has new spacing, badges and typography, friendlier timestamps ("5 min ago", "Yesterday"), and sender avatars that link to the sender

• Mobile: opening a corca.app/doc/… link now opens the app directly to that document

• Mobile: documents open much faster — the app keeps a warm editor ready in the background instead of loading from scratch each time, and swipe-back returns to the previous document

Week of Aug 24–30

• Selecting text and choosing Ask AI now sends those lines to the AI, which rewrites them in place or answers in chat without changing the document

• The Ask AI box now offers a few ready-made questions and edits about the text you selected

• The right-click menu now includes a text color picker, and Hide Block / Show Block for collapsible blocks

• Team chats are now listed separately from documents in the sidebar, ordered by latest activity, with an unread dot on the Chats header

• Opening a chat link from another team you belong to now switches to that team automatically

• Notifications now open the right place: comment links into documents you haven't visited, chat messages that don't belong to a document, and team invites that land on the team

• Chat notifications without a document now read "sent a message in chat" instead of naming an untitled document

• You can now add and verify extra email addresses in Account settings, by code or by a one-click link from the verification mail

• Signing in with an address already attached to another account now says so on the login page instead of leaving you stuck

• Mobile: the document tree and the unread counters for team and AI chat now update live

• Mobile: code cells can now be run from buttons in the editor toolbar

Week of Aug 17–23

• The left sidebar now groups documents under a collapsible Docs section that fits the window height, with a More… button for the rest

• New documents and folders can now be created from a menu in the Docs section title, and appear in the tree immediately

• Teams now show their members as avatars in the sidebar, with an Invite button and a +N overflow

• Team chats now have their own pages — create one from the Chats section, rename it inline, or mark it read from its ⋯ menu, with unread badges updating live

• Comment and shared-document notifications are now clickable: clicking one opens the document, opens the chat, and highlights the message

• Clicking a notification for the document you're already in now opens the chat in place, without reloading

• Shared-document notifications now have an Open Document button, and Accept and Decline resolve without navigating away

• The AI can now create folders and move documents and folders between them

• The AI now remembers images it has read from a document for the rest of the conversation

• Tool status in AI replies now sits below the text instead of above it, and finished steps disappear when they complete

Week of Aug 10–16

• Team and AI chat are now available in the mobile app and mobile browser

• Team chat now supports pasting or dragging in images and files as message attachments

• The right-click menu now includes Add Link, text formatting (bold, italic, underline, and more), and clipboard actions

• Right-clicking a calculated result now offers Unwrap and Go to source; right-clicking a word offers converting it to a variable, constant, or function

• The switch notation feature now recognizes more expressions and handles parentheses automatically

• Interactive controls like sliders, dropdowns, and checkboxes in code cells now render natively and stay in sync with the running kernel

• Declaring a domain like x∈ℤ or an interval now restricts solve results and graph plotting to that domain

• Upload placeholders in documents can now be selected and cancelled with Backspace, and survive collaborative edits while uploading

• The AI chat now creates new documents in the folder you're working in, and can list your folders and documents

Week of Aug 3–9

• Tables can now treat each row as its own equation, suggesting computed results for individual cells

• Added a stop button for AI responses, with the ability to steer the answer by sending a new message mid-stream

• Documents with unread chat messages now open that chat automatically

• Code cell sessions now sync across tabs and with the AI, keeping status and installed libraries up to date everywhere

• Restored the objects panel on read-only documents, showing values as plain text

• Team member role changes now update immediately without a page refresh

• Fixed the bot chat replacing an already-open team chat with unread messages

Week of Jul 27 – Aug 2

• Corca now distinguishes a prime used as a derivative from one used as an index or label

• Sending a chat message now uses Enter, with Cmd+Enter for a new line

• Files can be dropped directly on the AI chat button to start a conversation with them attached

• Tables: Enter no longer splits a cell into a new block, and arrow keys navigate directly into a table

• The Locked document indicator is now clickable, letting you toggle the lock from the byline or the sidebar

• Copying a collapsed section now includes its hidden content

• Fixed the Grid toggle in Visualizations shifting axis labels; statistics are now shown automatically

Week of Jul 20–26

• Added a Convert to field for converting values between compatible units

• Improved unit calculations with better support for mixed units and decimal results

• Added upload progress indicators for files and images in documents

• Improved AI chat's ability to read images and PDF files

• Document links in AI chat now open directly in the current tab

• Added keyboard shortcuts for applying math operators to a selection

• Improved number selection when editing mathematical expressions

Week of Jul 13–19

• Added collapsible blocks for every content type, including headings, code, tables, images, graphs, and embeds

• You can now collapse or expand multiple blocks at once, with a new keyboard shortcut

• Added the ability to lock documents to prevent editing

• You can now attach files directly to documents

• Improved math suggestions for functions such as sin²(x) and sin(-x)

• Public profiles now automatically expand folders to show the current document

• Added a Documentation link to the sidebar

• Fixed image imports from LaTeX projects

Week of Jul 6–12

• AI can now run code, install Python libraries, and execute it directly in your document

• Added drag-and-drop and paste support for file uploads in AI chat

• Improved OCR accuracy for handwritten math and ambiguous notation

• Added support for engineering units, including lbf, kip, ksi, psf, and more

• Added text alignment controls to the / menu

• Code block appearance is now a user preference across all documents

• Notifications now link directly to the relevant document

• Improved responsive layout and mobile editing experience

Week of Jun 29 – Jul 5

• Added computed references, making it possible to reference values across documents

• You can now upload files and images directly in AI chat

• Added a notifications center for document access requests

• Added support for per mille (‰) and basis point (‱) calculations

• Improved suggestions when working with units

• Improved copy and selection behavior for mixed text and math

• Improved collaboration stability when working across multiple tabs and documents

Week of Jun 22–28

• Added Auto mode for AI model selection, with Claude Sonnet as the default model

• Added collapsible blocks

• Added a status bar and Run All controls for executable code blocks

• Added undo/redo, arrow keys, and a symbol row to the mobile editor toolbar

• Improved OCR output and table formatting from AI-generated content

• Improved editing and collaboration stability

Week of Jun 15–21

• Unicode superscripts and subscripts now automatically convert to exponents and indices

• Added inline result previews for standalone expressions

• Added a / command menu for quickly inserting blocks

• Percentages are now handled correctly in calculations and result hints

• Units are now shown consistently in the right panel

• AI writing now streams directly into documents as content is generated

• Executable code blocks are now available to all users

• Redesigned AI chat with a cleaner layout and improved message actions

• Added right-click context menus for documents and folders

• Improved document selection and editing behavior across large documents

Week of Jun 8–14

• Added font size controls for code blocks

• Typing _ or ^ after a function now jumps directly into subscript and superscript labels

• Improved undo behavior for automatic grouping

• Fixed cursor positioning around math boundaries

• Unified selection styling across text and math

• Added font size and text color controls for table cells

• Improved the floating chat experience and chat entry points

• AI now writes content into documents incrementally

• AI can read specific document sections using line ranges

• Fixed blank document screens after returning to the mobile app

• Added direct file upload support

Week of Jun 1–7

• Long expressions inside brackets, functions, and parameter lists now wrap across multiple lines

• Variables with parameters can now have superscripts (for example, ƒ(x))

• Added support for solving inequalities and displaying interval solutions

• Variable domain constraints are now respected when solving equations

• Unit suggestions now work directly inside unit expressions

• Graph previews now support fractional expressions

• AI messages can now be copied, inserted into documents, or regenerated

• Added document and folder context menus on mobile

• Improved tooltip layout and keyboard shortcut display

Week of May 25–31

• Added a floating chat input that remains available at the bottom of the document

• Redesigned the chat input with model selection and chat settings

• AI can now understand and reference graphs, images, and embedded content in documents

• Trigonometric functions with numeric inputs now evaluate automatically

• Variable suggestions now include existing multi-letter variables

• Clicking symbols no longer closes the suggestion menu

• Improved suggestion loading and editor responsiveness

• Closing chat now restores focus to the editor

• Improved ungrouping behavior for bracketed expressions

Week of May 18–24

• Claude and Gemini can now browse the web and run code directly from chat

• Corca now opens your most recent document immediately after login

• Press Esc to close chat instantly

• Fixed font size resetting while editing

• Pressing Enter twice after a number now splits blocks correctly

• Added new set and interval template triggers: {x,, {x:, {x;

• Improved rendering for complex equation roots and conjugate pairs

• Marimo notebooks now run on production infrastructure with persistent sessions

• Updated mobile app icon, splash screen, and interaction stability

Week of May 11–17

• Added Taylor series expansion support directly inside documents

• Added AI model selection for the assistant

• AI can now generate graphs inline in your document

• Fixed degree units inside Sympy calculations

• Added interleaved AI reasoning during responses

• Added the ℏ symbol to the library

• Improved OCR for handwriting and image recognition

• Polished code block behavior and keyboard interactions

• Fixed unit autocompletion

• Collapsed sidebars now preview on hover

• Mobile registration flow is now live

Week of May 4–10

• AI can now create documents directly from chat

• Long AI tool outputs collapse automatically

• Added basic Python package management for Marimo notebooks

• Fixed phantom hints inside math boundaries

• Suggestions can now be accepted with Space

• Added := shortcut for “Defined As”

• Improved parsing of differentials such as dx and dy

• Improved AI prompting and automatic document title generation

Week of Apr 27 – May 3

• Added a fully collapsible right panel

• AI can now generate document titles automatically

• New users now receive role-specific starter documents

• Marimo notebook outputs now render inline in documents

• AI can now read and reference document images

• Improved AI support for tables and code blocks

• AI change requests can now be edited or deleted before approval

• Added cleaner math boundaries and layout behavior

• Fixed several Sympy issues involving complex numbers and factorials

Week of Apr 20–26

• Added Notion import support

• Added a floating formatting toolbar for selected text

• Equation solving now supports multiple variables simultaneously

• Added the Φ symbol to the Greek symbol library

• Updated the math font to v1.91

• Sidebars now collapse automatically when chat opens

• Migrated the interface to Tailwind 4

Week of Apr 13–19

• Added a full-featured code editor with syntax highlighting, themes, folding, and advanced editing support

• Fixed superscript parsing inside Sympy expressions

• Variables now inherit units automatically during assignment

• AI can now propose document edits as reviewable change requests

• Redesigned the left sidebar and unified team/document navigation

• Added per-line action menus

• Documents now use cleaner readable URLs

• Personal and team workspaces now open different starter documents

Week of Apr 6–12

• Added unit tracking for variables and constants

• Added a collapsible left sidebar

• Added customizable line context menus

• Improved team dropdown behavior and member visibility

• Fixed proportional image resizing

• Typing / now prioritizes division suggestions

Week of Mar 30–Apr 5

• Added Overleaf import support

• Dot decorators now work on grouped expressions

• Sidebars are automatically hidden during printing for cleaner exports

• Added dialog titles across the application for improved accessibility

• Added AI-guided onboarding for new users

• AI can now generate executable code blocks directly in documents

• Hints now display computed units alongside results

• Added Substitute & Match notation support

• Expanded NumPy-based data analysis capabilities

• AI can now read images embedded inside documents

Week of Mar 23–29

• Deleted documents can now be recovered before permanent removal

• Redesigned attachment layout with a cleaner fraction-style presentation

• Improved derivative parsing and rendering

• Restored visible AI reasoning in chat

Week of Mar 16–22

• Each document now runs in its own isolated Python environment

• \mathbf and \boldsymbol are now recognized as vector decorators

• Added cancel decorators for crossing out expressions

• Added support for \widetilde{} and \widehat{} during LaTeX import

• Folders can now be duplicated and forked

• Added sharing via permission links

• AI chat now supports full Markdown rendering

• Added boxed expression decorators

• Suggestions now support nested sub-options

• Statistical functions now work in Hints

• Gemini-powered AI can now search the web and run code

• AI responses can be inserted directly into documents with a single click

• Tables now support row and column resizing

• Long expressions inside tables wrap correctly instead of overflowing

• Added Import directly inside the document tree

• Double-clicking table borders resets row and column size

• Added e as a shortcut for Euler’s number

Week of Mar 9–15

• AI-generated code can now run directly inside documents

• AI suggestions can now be edited or deleted inline

• Improved code block interactions and editing behavior

• Fixed the Cmd + K menu in dark mode

• Improved nested suggestion ordering

• Shared document previews now generate updated Open Graph images automatically

• Added function evaluation at specific variable values

• Added personal draft documents

• Numbers and grouped expressions now highlight when the cursor is inside them

• Added matrix operations support

Week of Mar 2–8

• Improved LaTeX import reliability and edge-case handling

• Added personal drafts for private work-in-progress documents

• Complex infinity values (∞, zoo) now render correctly in Hints

• Mobile suggestion boxes now hide correctly after pressing Done

• Fixed LaTeX math alignment during export

• AI can now analyze images embedded inside documents

• Expanded symbolic math function support in Sympy

• Added context-aware phantom hints

• Improved LaTeX import for bracket and decorator styles

• Fixed mixed math/text cut and paste behavior

• Table copy-paste now preserves mathematical expressions correctly

Week of Feb 23 – Mar 1

• Redesigned the Share dialog and sharing flow

• AI chat now displays active tool usage in real time

• Added remaining message counters to the chat panel

• Improved SEO for published documents and teams

• Usernames are now generated automatically from full names during signup

Week of Feb 16–22

• Hints can now evaluate multi-line variable definitions

• AI can now write output directly into files and documents

• Updated and simplified the registration flow

• Raster images inside LaTeX imports now load correctly

• TikZ diagrams now render during LaTeX import

• Added partial mouse selection inside mathematical expressions

• Added factoring suggestions to Hints

• Decorators are now respected during hint evaluation

• Entire folder structures can now be duplicated

Week of Feb 8–14

• AI responses now stream live while generating

• Set theory operations now work in Hints

• Arrow keys now move naturally between math and text blocks

• Cursor navigation for integrals and limits improved

• Symbols and operators now highlight when focused

• Added inline SVG support

• Fixed copying standalone mathematical expressions

• Imported LaTeX expressions now appear as suggestions

• Matrix selections are preserved during undo and redo

• Expression suggestions now display input labels

Week of Feb 2–8

• Added direct LaTeX document import

• Improved parsing for double and triple integrals

• AI can now analyze uploaded images

• Added hyperbolic functions to the math engine

• Added new constants including ϕ,j, and 𝐺

• Updated the math font to v1.90

• Added public folders

• Undo and redo now work correctly across mixed math and text

• Added indentation controls in text mode

• Added integral, derivative, and Fourier transform suggestions

• Embedded content now scales correctly to container width

Week of Jan 26–Feb 1

• Summation and product expressions now evaluate inside Hints

• Pressing Enter on indented lines now preserves indentation automatically

• Added visibility toggles for function parentheses

• Added block duplication controls

• URLs now expand into rich previews automatically

• Hints now appear inline directly in the editor

Week of Jan 19–25

• Began rolling out streaming AI responses

• Added automatic embeds for YouTube, Figma, and other known services

• Improved indentation behavior for continuation operators in equations

• Fixed a collaborative editing issue that could corrupt documents

Week of Jan 12–18

• Added support for embeds inside documents

• AI can now summarize documents

• Added GCD, LCM, abs, max, min, floor, and ceil support in Hints

• Files can now be dragged directly into the left sidebar

• Added style controls for embedded content

• AI can now read document content directly

• Fixed log evaluation in Hints

• Improved grouped expression behavior and stability

• Improved search result relevance for teams and users

Week of Jan 5–11

• Added Notion import with image support

• Added fraction-style derivative notation (dy/dx)

• Chat input and AI responses now support multi-row mathematical layout

• Improved differential evaluation in Hints