Release Notes

Update history for JijZept AI.

v2026.02.17 (2026-02-17)

New Features

• Macro-Enabled Excel File (.xlsm) Attachments: You can now attach macro-enabled Excel files (.xlsm) to your chat messages. Like standard Excel files (.xlsx), they are automatically converted and the AI reads the content to provide answers.

v2026.02.16.2 (2026-02-16)

New Features

• PowerPoint File (.pptx) Attachments: You can now attach PowerPoint files to your chat messages. Attached PPTX files are automatically converted and the AI reads the content to provide answers. Additionally, the per-message limit on DOCX attachments has been removed, allowing up to 10 files per message like other file types.

Improvements

• Toggle Skip Approval During AI Responses: You can now toggle "Skip approval" on or off while the AI is actively responding. When toggled on, any pending approval requests are automatically processed.

v2026.02.16.1 (2026-02-16)

New Features

• Excel File (.xlsx) Attachments: You can now attach Excel files to your chat messages. Attached Excel files are automatically converted and the AI reads the content to provide answers.
• Expanded Text File Support: Added support for attaching Markdown (.md), CSV, TSV, JSON, and JSONL files. Each file type displays a distinctive badge for easy identification.

v2026.02.16 (2026-02-16)

Improvements

• Improved response stability when the AI searches reference materials.

v2026.02.13.1 (2026-02-13)

New Features

• Image Annotation: You can now annotate visualizer-generated images with rectangles, arrows, freehand drawing, and text. Send annotated images directly to the AI to ask questions or give instructions about specific areas.

v2026.02.13 (2026-02-13)

Improvements

• Solution results now display proper loading states and error messages when optimization jobs are still processing or have failed.

Bug Fixes

• Fixed a minor display issue in AI responses.

v2026.02.12 (2026-02-12)

New Features

• DOCX File Attachments: You can now attach Word files (.docx) to your chat messages. Attached DOCX files are automatically converted and the AI reads the content to provide answers.
• Skip Tool Approval: Select "Skip approval" from the dropdown in the chat toolbar to bypass per-tool approval dialogs. Useful when frequently using tools.

Bug Fixes

• Fixed an issue where authentication errors could occur during Python visualizer execution.

v2026.02.10 (2026-02-10)

Bug Fixes

• Fixed an issue where code blocks were not displayed correctly in dark mode (background color, borders, and syntax highlighting).

v2026.02.09 (2026-02-09)

New Features

• Step-by-Step Optimization Problem Analysis: The AI now processes optimization problems in three stages (Problem Analysis → Mathematical Formulation → Code Generation). You can review and approve each step's results before proceeding to the next, giving you visibility into the AI's analysis process.

Bug Fixes

• Fixed an issue where tool approval did not work correctly when the AI attempted to execute multiple tools simultaneously.

v2026.02.06 (2026-02-06)

New Features

• Tool Execution Approval: Approve/Decline buttons are now displayed before the AI executes tools. Approve to proceed with execution, or decline to stop the AI's action. Approval state is preserved across page reloads.

v2026.02.04.1 (2026-02-04)

New Features

• Clipboard File Paste: You can now paste files (images, PDFs, text files) directly from the clipboard into the chat input using Cmd+V (Mac) or Ctrl+V (Windows).

Bug Fixes

• Fixed an issue where visualizer-generated images were not displayed after page reload.

v2026.02.04 (2026-02-04)

Bug Fixes

• Fixed an issue where authentication errors could occur during long AI sessions.

v2026.02.03 (2026-02-03)

New Features

• Drag & Drop File Attachments: You can now attach files by dragging and dropping them onto the chat input.
• Attachment Preview: Attached files are now displayed as preview cards.

Improvements

• Refreshed the chat input design.

v2026.02.02 (2026-02-02)

Improvements

• Significantly upgraded the AI foundation system. This update lays the groundwork for continuously and substantially improving your AI interaction experience going forward.
• Improved sidebar loading speed.

Bug Fixes

• Fixed an issue where AI responses could get stuck in "Executing" state and never complete.
• Fixed an issue where the AI could get stuck in a repetitive loop during code generation.

v2026.01.29.1 (2026-01-29)

New Features

• Stop Button: A stop button now appears during AI response generation. Click it to immediately interrupt the AI's response. Cancelled tools are displayed as "Cancelled".

v2026.01.29 (2026-01-29)

Improvements

• Sidebar resource sections (Jobs, Problems, Instance Data, Solutions) are now collapsed by default. Click a section to expand it, keeping the interface cleaner.

Bug Fixes

• Fixed an issue where the service could become unresponsive due to memory exhaustion during AI conversations.

v2026.01.27 (2026-01-27)

Improvements

• Improved system stability.

v2026.01.26 (2026-01-26)

New Features

• Explicit Tool Selection: Available tools are now displayed before the AI uses them. Users can explicitly specify which tools to use, giving more control over AI behavior.

v2026.01.21 (2026-01-21)

Improvements

• Improved AI response quality.

v2026.01.16 (2026-01-16)

Improvements

• Improved internal system stability.

v2026.01.14 (2026-01-14)

Improvements

• Split the "Solve Problem" tool into the following tools to improve the execution process:
  • Upload Problem: Uploads problem definitions written in JijModeling (Python code) to the server
  • Upload Instance Data: Uploads instance data (parameter values in JSON) to the server
  • Submit Job: Submits an optimization job using the problem definition and instance data
  • Wait for Job: Waits for job completion in real-time and displays progress
  • Load Solution: Loads the solution from the server

v2026.01.09 (2026-01-09)

Improvements

• Added tooltips to UI buttons. Hover over buttons to see descriptions of their functions.

Bug Fixes

• Fixed an issue where the agent selector dropdown was not displayed properly.

v2026.01.06 (2026-01-06)

Improvements

• AI responses are no longer lost when reloading the page. Response content is preserved even during streaming.
• New chats now appear immediately in the sidebar after sending.

v2025.12.26 (2025-12-26)

New Features

• Discord Community: Added a Discord community button to the landing page. Join to connect with other users and share information.
• Real-time Job Progress: Optimization job progress is now displayed in real-time during execution.

Improvements

• Error messages are now displayed in the chat interface when errors occur.

v2025.12.25.1 (2025-12-25)

New Features

• Resource Browser: Browse problem definitions, instance data, and solutions from the sidebar and attach them to AI chat. Selected resources appear above the input field and are referenced when asking questions to the AI.

v2025.12.25 (2025-12-25)

Improvements

• Improved system stability.

v2025.12.23 (2025-12-23)

New Features

• LaTeX Formula Display: Mathematical optimization model results are now automatically displayed as beautiful LaTeX formulas. View objective functions and constraints in proper mathematical notation.
• Waitlist Form: Added waitlist registration for new users. Register your email address to be notified when access becomes available.

Improvements

• Simplified landing page navigation.

v2025.12.22 (2025-12-22)

Bug Fixes

• Fixed redirect destinations when accessing settings pages without being signed in.

v2025.12.19.3 (2025-12-19)

Improvements

• Upgraded to Gemini 3 Flash AI model for improved response quality.

v2025.12.19.2 (2025-12-19)

New Features

• Starter Prompts: When starting a new chat, 4 prompt cards (Model, Visualize, Solve, Ask) are now displayed. Click a card to automatically fill the input field with a relevant prompt. First-time users can easily explore JijZept AI's capabilities.

v2025.12.19.1 (2025-12-19)

Bug Fixes

• Fixed an issue where clicking the "Launch Chat" button on the landing page resulted in a page not found error.

v2025.12.19 (2025-12-19)

New Features

• What's new Page: Added a page where you can check new features and updates for JijZept AI. View detailed explanations and demo videos for each feature.
• Release Notes Page: Added a page to view the complete update history.

Improvements

• You can now access the What's new page directly from the navigation.
• Content is now displayed in Japanese or English based on your browser's language settings.

v2025.12.16 (2025-12-16)

Migrated authentication system to production environment.

v2025.12.12 (2025-12-12)

New Features

• Visualizer Range Selection: You can now draw rectangles on matplotlib-generated visualizations to select specific regions. Ask JijZept AI questions about the selected area.
• Load Optimization Results: JijZept AI can now retrieve computation results from the optimization service in the Pyodide sandbox.

Improvements

• Simplified JijZept URI display.
• Improved response processing speed.

Bug Fixes

• Fixed an issue where the same message was displayed multiple times.
• Improved visualizer selection UI.

v2025.12.09 (2025-12-09)

Improvements

• Enhanced system monitoring to facilitate troubleshooting.

v2025.12.05.1 (2025-12-05)

Improvements

• Updated backend services.

v2025.12.05 (2025-12-05)

Bug Fixes

• Fixed a flickering issue on page load for users with dark mode enabled at OS level.

v2025.12.04 (2025-12-04)

New Features

• Production Schedule Gantt Chart: Visualize production scheduling results with an interactive Gantt chart. Includes interactive elements such as KPI cards, dependency arrows between tasks, and status indicators.

Bug Fixes

• Improved retry handling for JijModeling code generation.

v2025.12.02 (2025-12-02)

New Features

• User Feedback Collection: JijZept AI responses now display thumbs up/down buttons. Negative feedback allows selecting from 10 issue categories with detailed comments. Feedback is persisted across sessions.
• Organization & Workspace Support: Added workspace functionality for team collaboration. All users have a personal workspace and can create or join organization workspaces. Chat threads are "private by default" - visible only to yourself even within an organization.
• Invite Users: Existing users can now invite new users to JijZept AI. Invited users can start using the application with their own personal workspace. Access from the gear icon menu.
• Organization Invitation: Organization admins can now invite users directly to the organization. Manage invitations from the team settings page.
• Team Settings UI: Added management interface for organization members.

v0.3.2 (2025-11-26)

Bug Fixes

• Fixed an issue where JijZept AI generated non-existent methods and improved generated code display.

v0.3.1 (2025-11-25)

New Features

• Agent Selector: Added the ability to select which agent to use.

v0.3.0 (2025-11-25)

New Features

• Automatic Retry for JijModeling Code Generation: Automatically retry when code validation fails, improving the success rate of generated JijModeling code.

Improvements

• Upgraded backend services.

Bug Fixes

• Improved landing page UI.

v0.2.1 (2025-11-21)

Improvements

• Chat messages can now be sent using platform-specific modifier keys (Mac/Windows).