014ec34249
* 🐛 Add regression test: main-side component edits break copy swap slots Reproduces the :missing-slot referential-integrity failure ("Shape has been swapped, should have swap slot") that crashes files with component copies. Root cause: reordering or deleting a nested sub-head IN THE MAIN of a component, while copies exist, does not propagate swap slots to the copies. find-near-match matches a copy's sub-heads to the main's children by POSITION, so once the main's order changes the copies' shape-refs no longer match their position and, lacking a swap slot, fail referential-integrity validation. - Copy-side edits are handled correctly (characterization tests, pass today). - The two main-side tests fail today with :missing-slot and go green once the sync assigns swap slots to copies on a main reorder/delete. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * 🐛 Fix integrity crashes from copy/main child-order divergence Copy sub-heads were matched to their main's children purely by position (find-near-match), while several code paths reorder or mutilate one side only. Any of them made file validation fail with :missing-slot ("Shape has been swapped, should have swap slot"), crashing the workspace on the next validated commit, or persisting a corrupt file whose later edits crash. Reproduced live: deleting a sub-head inside a copy (which only hides it) and then reflowing the copy's grid moved the hidden (cell-less) child to the front of :shapes, knocking every sibling out of its positional slot. Four fixes, one per divergence path: - validate/check-required-swap-slot: a sub-head whose shape-ref is still a child of the near main parent is a REORDER (the component sync realigns it), not a swap; a swap slot is required only when the ref points outside the near main parent (a real swap). This matches how the sync engine itself pairs children (by shape-ref, not by position). comp-processors/fix-missing-swap-slots (migration 0019) is aligned: adding slots to merely-reordered sub-heads would freeze them out of normal synchronization. - changes/:reorder-children now refuses to alter the child structure of component copies unless allow-altering-copies is set, mirroring the is-valid-move? rule of :mov-objects; that structure is owned by the component sync engine. Grid reflows emitted this change type with no guard. pcb/reorder-grid-children also skips copy grids producer-side. - layout/reorder-grid-children keeps children that participate in no cell (hidden or absolute positioned) at their original index instead of lumping them at the front: moving them gratuitously changed their z-order and, in copies, broke the positional matching. Note :shapes stays reversed relative to the sorted cell order for in-cell children. - logic/generate-delete-shapes: deleting shapes from inside a main (without deleting the main root, whose copies keep working against the deleted component) now also deletes the copy shapes that reference them, transitively (copies of copies) and across all pages of the file, so no dangling shape-refs remain. Skipped for allow-altering-copies flows (component swap replaces the shape and the sync reconciles copies via swap slots). Cross-page removals build redo/undo changes against that page's objects directly, since the changes-builder mounts only the current page; their undo mov-objects carry allow-altering-copies so restoring inside a copy is not rejected by the new guard. The regression tests assert the fixed semantics: main-side reorders and deletes keep copies valid, the previously crashing full chain (unvalidated main reorder + later copy edit) stays healthy, :reorder-children cannot scramble copies, and reorder-grid-children keeps cell-less children in place. The namespace is now also registered in the JS test runner. AI-assisted-by: Claude Opus 4.8 (1M context) * ✨ Extend composable slot cases to the grid-reflow crash sweep Case D (CopySubheadDeletePreservesSlots) now sweeps which copy sub-head is deleted (first or last) and whether the copy root is resized afterwards, forcing a grid reflow: the reflow used to move the hidden (cell-less) child to the front of the copy's children, shifting every sibling out of its positional slot. Deleting the FIRST sub-head masked the bug (moving it to the front is a no-op), which is why the case passed before this sweep. The foundation layout is grid accordingly. Case E (MainReorderKeepsCopySlots) no longer hangs the app now that a main-side reorder leaves a valid file, so its warning docstring is replaced: it runs as a routine test (verified headless, passing) and is safe in a "run all". SlotIntegrity's doc is updated to the new validator semantics (a slot is required only for real swaps, not reorders); the positional alignment it asserts remains the correct, stronger steady-state invariant for these cases. The lockfile change materializes the playwright devDependency already declared in package.json. AI-assisted-by: Claude Opus 4.8 (1M context) * 📚 Record copy/main order-divergence invariants in memories Swap-slot semantics (membership, not positional; slots only for real swaps), the copy-structure guards on :mov-objects/:reorder-children, the grid reorder stability for cell-less children, and the main-side delete propagation in generate-delete-shapes. AI-assisted-by: Claude Opus 4.8 (1M context) * 🐛 Add adjustements to the code --------- Co-authored-by: Michael Panchenko <michael.panchenko@oraios-ai.de> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Website • User Guide • Learning Center • Community
Youtube • Peertube • Linkedin • Instagram • Mastodon • Bluesky • X
Penpot is the open-source design platform for teams that build digital products at scale.
Penpot’s key strength lies in giving you full ownership of your design infrastructure. Built on open source and designed for self-hosting, it puts teams in complete control of their design environment supporting strict compliance and governance requirements. Whether used in the browser or deployed on your own servers, Penpot works with open standards like SVG, CSS, HTML, and JSON.
Real-time collaboration strengthens this foundation, helping teams scale and bring design closer to the product through top-tier capabilities. Additionally, developers feel at home using Penpot, because design is expressed as code, enabling a direct translation and shipping products faster.
Best-in-class native Design Tokens provide a single source of truth between design and development. They ensure consistency, improve collaboration, and make it easier to manage complex design systems.
The MCP server takes it further by enabling multi-directional workflows between design and code. A powerful open API and plugin system makes the workspace programmable, enabling automation, AI-driven workflows, and integrations with the tools and systems you already use.
With CSS Grid and Flex Layout, teams can design responsive interfaces that behave like real code from the start.
Combined, these features turn Penpot into a full-stack design platform for building scalable design systems and fully integrated product development processes.
If your organization is scaling and needs extra support, we’re here to help. Talk to us
Table of contents
Why Penpot
Penpot connects design, code, and AI workflows through a code-based approach, making designs readable by developers and AI via the MCP server. This approach helps teams ship what’s actually designed and manage design systems at scale with powerful design tokens. As a self-hosted, open-source and real-time collaboration platform, Penpot offers full flexibility, security, and ownership without vendor lock-in. Learn more about why Penpot is the platform for your team.
Plugin system
Penpot plugins let you expand the platform's capabilities, give you the flexibility to integrate it with other apps, and design custom solutions.
Designed for developers
Penpot was built to serve both designers and developers and create a fluid design-code process. You have the choice to enjoy real-time collaboration or play "solo".
Inspect mode
Work with ready-to-use code and make your workflow easy and fast. The inspect tab gives instant access to SVG, CSS and HTML code.
Integrations
Penpot offers integration into the development toolchain, thanks to its support for webhooks and an API accessible through access tokens.
Building Design Systems: design tokens, components and variants
Penpot brings design systems to code-minded teams: a single source of truth with native Design Tokens, Components, and Variants for scalable, reusable, and consistent UI across projects and platforms.
Getting started
Penpot is the only design & prototype platform that is deployment agnostic. You can use it in our SAAS or deploy it anywhere.
Learn how to install it with Docker, Kubernetes, Elestio or other options on our website.
Community
We love the Open Source software community. Contributing is our passion and if it’s yours too, participate and improve Penpot. All your designs, code and ideas are welcome!
Want to go a step further? Become a Penpot Ambassador and help grow the Penpot community in your region while contributing to a global, open design ecosystem.
If you need help or have any questions; if you’d like to share your experience using Penpot or get inspired; if you’d rather meet our community of developers and designers, join our Community!
Categories include:
- Ask the Community
- Troubleshooting
- Help us Improve Penpot
- Events and Announcements
- Penpot in your language
- Education
Code of Conduct
Anyone who contributes to Penpot, whether through code, in the community, or at an event, must adhere to the code of conduct and foster a positive and safe environment.
Contributing
Any contribution will make a difference to improve Penpot. How can you get involved?
Choose your way:
- Create and share Libraries & Templates that will be helpful for the community.
- Invite your team to join.
- Give this repo a star and follow us on Social Media: Mastodon, Youtube, Instagram, Linkedin, Peertube, X and BlueSky.
- Participate in the Community space by asking and answering questions; reacting to others’ articles; opening your own conversations and following along on decisions affecting the project.
- Report bugs with our easy guide for bugs hunting or GitHub issues.
- Become a translator.
- Give feedback: Email us.
- Contribute to Penpot's code: Watch this video by Alejandro Alonso, CIO and developer at Penpot, where he gives us a hands-on demo of how to use Penpot’s repository and make changes in both front and back end.
To find (almost) everything you need to know on how to contribute to Penpot, refer to the contributing guide.
Resources
You can ask and answer questions, have open-ended conversations, and follow along on decisions affecting the project.
✏️ Tutorials
🏘️ Architecture
🧑🏫 UI Design Course
License
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
Copyright (c) KALEIDOS INC Sucursal en España SL
Penpot is a Kaleidos’ open source project