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Burke HollandandCopilot App
44a37b59fa
* Add Draw canvas extension Draw is a GitHub Copilot app canvas for simple diagrams: shapes, arrows that stay attached, text and a freehand pen. The user and Copilot edit the same drawing. Copilot can create, change, lay out and export it through canvas actions, and the Ask Copilot button sends the drawing to the chat. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address Copilot review feedback - Refuse changes that would take a drawing past 5,000 elements with a clear error instead of silently dropping elements, and stop the canvas from retrying a refused save. - Keep collision suffixes within the 48-character id limit. - Keep a drawing and report the error when deleting its file fails. - Retry failed drawing writes, and report them in the canvas and in agent action results instead of only logging them. - List pen strokes in the get_drawing outline. - Let Space and Enter work normally on focused buttons. - Only use Tab to add a step when a shape is selected, so Tab can move focus out of the canvas. - Pick readable text colors for accent and danger backgrounds. - Hide "Bring to front" and "Send to back" when only arrows are selected, since arrows always draw on top. - Report theme save failures from /api/settings and set_theme. - Keep the top bar buttons visible when the status text is long, and remove leftover theme debug logging. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address second Copilot review - Add node:test suites for the loopback server (Host and token checks, static file allowlist and CSP, every API route, live events and save error reporting), the drawing store, layout label references and solid-fill text contrast. Run them with `node --test` in extensions/draw. - Give every popover an accessible name. The delete confirmation is now an alertdialog described by its question. - Build the id and label lookups in buildFromSpec once, instead of once per element or per edge. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address third Copilot review - Switching drawings or asking Copilot no longer goes ahead when the edits on screen could not be saved first. Draw stays on the drawing and offers "Discard changes", and a switch started by the agent moves the server back to the drawing the panel still shows. Deleted drawings never hold the panel. - Agent actions write the drawing before returning, so a disk problem is reported by the action that caused it. - Count edge crossings with a Fenwick tree (O(E log V)) and typed arrays. The layout is unchanged; the worst case is about three times faster. - Reconnecting brings back a save error that still applies. - The selection keeps up to MAX_ELEMENTS ids instead of 1,000. - Tests for the actions wrapper, the selection limit and crossing counts. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address fourth Copilot review - Stop an old save from undoing the last one. Each change the page sends now has a number, and the server drops one older than a change it already applied (refused changes do not count). The save sent when the panel closes also sets every element the change still on its way touched to what the editor shows, so either arrival order ends with what is on screen. - get_drawing reads a big drawing in parts of about 30,000 characters (start and nextStart), can list only some ids or the selection, cuts labels longer than 300 characters in the outline, and counts a huge selection instead of listing it. - Ask sends at most about 16,000 characters of outline and says how to read the rest with get_drawing. - After switching away from a drawing with "Discard changes" while a save was on its way, send edits made in the new drawing once it returns. - Tests for all of the above. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address fifth Copilot review - Exports stay with the drawing they came from. The agent's export request names the drawing, the page answers with the id it actually drew, and the server turns down a mismatch instead of saving the image under the wrong drawing. Save as PNG and Ask read the id right before rendering, and Ask keeps the question if another drawing opens while it is sending. - When the server tidies up a save, for example by capping a size, it sends the stored drawing back and the page shows that instead of assuming it was stored as sent. The tidy-up is not an undo step, so undo cannot get stuck on it. - Shapes are capped at 5000 wide or tall everywhere. Growing a shape for a longer label or a bigger text size caps the height before centering, so the shape no longer jumps. - Rebuilding the style bar keeps keyboard focus on the same button, and hiding it moves focus to the canvas. - Edits refresh the drawing list, batched so a burst of edits sends it once, and a copied drawing is listed with its real element count. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address sixth Copilot review - Ask refuses (409) to send a question when the panel shows another drawing than the one it is about, and the page keeps the draft. The context it sends now includes the drawingId. - Actions on the shown drawing take an optional drawingId. If the canvas shows a different drawing, they change nothing and say which one it shows. - Temp file names for atomic writes include a counter, so two writes of one file in the same millisecond no longer share a temp file. - The canvas works from the keyboard and with screen readers: the SVG is a focusable application with a description, N and Shift+N select elements, Enter adds shapes and text or connects shapes with the arrow tool, Ctrl+Shift+Arrow resizes, and a live region reads out the tool, the selection and each change. Tab now moves focus instead of adding a step, except while typing a label. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address seventh Copilot review - Saving: a write that fails part way (a full disk, say) no longer leaves its temp file behind. Every retry picks a new temp name, so these used to pile up. - Diagram specs: a node or text with only x or only y is now an error that names the item, instead of being laid out automatically and silently dropping the coordinate that was given. Non-numeric x or y is an error too. - Switching drawings: while the panel waits to save the current drawing before showing another one, the server already sends the new drawing's changes, save status and selection. These are now kept and applied when the switch finishes, instead of being dropped. - Showing the drawing that is already on screen (an agent calling open_drawing on it, or two switches to the same drawing) is now a normal update. It no longer reloads the editor, which wiped the undo history, the selection and the zoom, and it no longer warns about unsaved changes while a save is being refused. The server keeps the panel's selection in that case too. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address eighth Copilot review - State file: writes of .state.json (which drawing each panel shows) now run one at a time, and each one takes the state as it is when its turn comes. An older write that is slow to finish (Windows can briefly lock a file) can no longer land after a newer one, and flush() now also waits for a state write that had already started. - Placement: when every spot tried next to a shape is taken, a new shape now goes just past everything in that direction, in line with the shape, instead of on top of existing content. This covers both the editor's "add a connected step" command and add_elements. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address ninth Copilot review Tab in the label editor now adds the next step only for shape labels. For free text and arrow labels it keeps its normal job and moves focus on, and the blur saves the edit. The README and the in-app shortcut list now say "a shape's label". Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address tenth Copilot review - Label wrapping searches for how many words or characters fit on a line instead of adding one at a time, so a long label with no spaces is no longer quadratic. The output is unchanged. - Arrows attached to nothing follow their elbow or curve route too. - A selection the agent makes while the user drags or edits a label is shown once they finish, unless they picked something else meanwhile. - A drawing name more than one drawing has no longer opens the first one; the error lists their ids, and an exact id always picks one. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address eleventh Copilot review - Pen strokes stay bounded while drawing: once a stroke holds 10,000 points it is simplified and thinned to 5,000. A saved stroke keeps an even spread of its points with both ends, instead of losing its end past 5,000 points. Simplification runs in pieces of 512 points, so its time grows in step with the stroke rather than with its square. - Live updates send the element-level ops that made a change, against the drawing one change earlier, instead of the whole drawing to every other panel. A panel that finds a change missing fetches the whole drawing again. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address twelfth Copilot review - The save a page sends as it closes is marked keepalive whenever it fits the browser's 64 KiB limit. That limit covers all keepalive requests together, so splitting would not help; a bigger save goes as an ordinary request. - Pen strokes keep at most 2,000 points, so even the biggest one fits in that save. A test checks the biggest stroke and labels against the limit. - A rename goes to the drawing it was typed for. It is cancelled if the panel moves to another drawing, it does not undo a rename the agent made meanwhile, and its reply never moves the panel. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address thirteenth Copilot review - Turn down a layout that would put a shape or text past the +/-1,000,000 position limit (very long arrow labels spread the layers that far). Saving used to move such positions back to the limit, stacking shapes on top of each other while the action reported success. set_diagram and add_elements now fail with invalid_diagram, and layout with layout_too_big, and nothing is changed. - Fetch the drawing each time the event stream connects, not only on reconnects. A change made after the page loaded the drawing but before the server registered the new connection was never delivered. - List text size on shapes, arrows and text, and color on text, in the get_drawing outline, and say that styles left out are the defaults. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address fourteenth Copilot review - open_drawing now waits for the canvas to take the drawing. The switch carries an id, and the page confirms it once it shows the drawing, or, when it has edits it cannot save yet, moves the panel back with the same id. A refusal becomes an unsaved_changes error, and no answer within 10 seconds is reported as unconfirmed, with advice to pin drawingId. - Pen hit testing no longer makes an object for every point on every pointer move. Stroke extents are cached per points array, strokes out of reach are skipped by their box, and the rest are measured straight from the stored pairs. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> * Address fifteenth Copilot review - Automatic layout counts the placeholders its long arrows need before making any, and turns down a drawing that needs more than 100,000. A long chain with many arrows across it could otherwise need millions, which kept the extension busy for most of a minute. layout fails with layout_too_big, and set_diagram and add_elements with invalid_diagram, and nothing is changed. - relayout now returns { elements, error } like buildFromSpec, so the layout action gets this and the position range check from one place. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
🤖 Awesome GitHub Copilot
A community-created collection of custom agents, instructions, skills, hooks, workflows, and plugins to supercharge your GitHub Copilot experience.
Tip
Explore the full collection on the website → awesome-copilot.github.com
The website offers full-text search and filtering across hundreds of resources, plus the Learning Hub for guides and tutorials.
Using this collection in an AI agent? A machine-readable
llms.txtis available with structured listings of all agents, instructions, and skills.
📖 Learning Hub
New to GitHub Copilot customization? The Learning Hub on the website offers curated articles, walkthroughs, and reference material — covering everything from core concepts like agents, skills, and instructions to hands-on guides for hooks, agentic workflows, MCP servers, and the Copilot coding agent.
What's in this repo
| Resource | Description | Browse |
|---|---|---|
| 🤖 Agents | Specialized Copilot agents that integrate with MCP servers | All agents → |
| 📋 Instructions | Coding standards applied automatically by file pattern | All instructions → |
| 🎯 Skills | Self-contained folders with instructions and bundled assets | All skills → |
| 🔌 Plugins | Curated bundles of agents and skills for specific workflows | All plugins → |
| 🍳 Cookbook | Copy-paste-ready recipes for working with Copilot APIs | — |
Install a Plugin
For most users, the Awesome Copilot marketplace is already registered in the Copilot CLI/VS Code, so you can install a plugin directly:
copilot plugin install <plugin-name>@awesome-copilot
If you are using an older Copilot CLI version or a custom setup and see an error that the marketplace is unknown, register it once and then install:
copilot plugin marketplace add github/awesome-copilot
copilot plugin install <plugin-name>@awesome-copilot
Contributing
See CONTRIBUTING.md · AGENTS.md for AI agent guidance · Security · Code of Conduct
The customizations here are sourced from third-party developers. Please inspect any agent and its documentation before installing.
Contributors ✨
Thanks goes to these wonderful people (emoji key):
This project follows the all-contributors specification. Contributions of any kind welcome!
📚 Additional Resources
- VS Code Copilot Customization Documentation - Official Microsoft documentation
- GitHub Copilot Chat Documentation - Complete chat feature guide
- VS Code Settings - General VS Code configuration guide
™️ Trademarks
This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.