Sasha Studio Release Notes: v1.0.904 to v1.0.969

Release Period: January 2026
Version Range: 1.0.904 → 1.0.969
Total Commits: 192
Actual Code Changes: 357 files changed, 13,047 insertions, 110,519 deletions

TL;DR - Business Summary

What's New in Plain English:

This release delivers 4 major improvements to how you use Sasha:

Mobile-First Experience - Use Sasha comfortably on your phone or tablet. The interface now auto-hides navigation when you're reading or typing, maximizing screen space. Touch interactions work smoothly, and the sidebar closes automatically after selection.
Output Styles - Choose how Sasha responds before you start chatting. Select from different response styles (concise, detailed, research-focused) directly from the chat interface. Each session can have its own style.
Better Diagrams - Mermaid diagrams (flowcharts, pie charts, sequence diagrams) now render reliably in your knowledge base. No more broken or missing diagrams.
Welcome Emails - New users automatically receive a welcome email when their account is created, with login instructions and getting started guidance.

Business Value:

Work Anywhere: Full mobile support means access to institutional knowledge on the go
Consistent Quality: Output styles ensure appropriate response formatting for different use cases
Better Documentation: Reliable diagram rendering improves knowledge base quality
Smoother Onboarding: Automated welcome emails reduce admin overhead

Executive Summary

This release prioritizes mobile usability and response customization. The mobile interface underwent a complete overhaul—navigation chrome auto-hides on scroll, the sidebar is touch-optimized, and the chat composer stays accessible at the bottom of the screen.

The Output Styles feature lets users select how Sasha should respond before starting a conversation. Styles can be configured globally or per-session, with tracking through hooks and reporting. This lays groundwork for teams to standardize response formats across different use cases.

Mermaid diagram rendering received extensive fixes to work reliably in the knowledge SPA. Diagrams now load correctly regardless of how users navigate to documentation, with proper CDN loading, script injection, and HTML entity handling.

Infrastructure improvements include security patches for ReDoS vulnerabilities in MCP integrations, Docker startup optimizations, and welcome email automation for new user onboarding.

Major Features & Improvements

Mobile Experience

Auto-Hide Chrome - Header and input controls hide on scroll to maximize content space
Touch-Optimized Sidebar - Sidebar closes automatically when selecting items; improved close button visibility
Bottom Chat Input - Chat composer positioned at bottom for thumb-friendly typing
Safari Compatibility - Hardened overlays and animations for Safari mobile
Compact Layout - Reduced project item height, removed tooltips that interfered with touch
Responsive Processing Banner - Compact processing indicators that don't obstruct mobile view
Ellipsis Menu - Mobile chat actions consolidated into overflow menu

Output Styles

Per-Session Styles - Select output style before starting a chat session
Style Selector UI - Dropdown in chat interface for style selection
Output Styles Manager - Admin interface to create, edit, and delete output styles
Hook Integration - Output style tracked through hooks and included in reports
Database Tracking - Style preferences persisted per session
Claude Code Compatibility - Styles use frontmatter format compatible with Claude Code subagents

Knowledge & Diagrams

Mermaid Reliability - Fixed diagram rendering with proper CDN loading and script injection
HTML Entity Decoding - Mermaid content properly decoded before rendering
Pie Chart Support - Initialize mermaid with correct config for all diagram types
Script Cleanup - Removes broken cloned scripts before re-injecting fresh ones
Theme Consistency - Mermaid theme synced with main.js for consistent styling

User Onboarding

Welcome Email - Automatic email sent when admin creates new user
Email Templates - HTML and text versions for broad email client support
Login Instructions - Welcome email includes getting started guidance

Security

ReDoS Patches - Fixed Regular Expression Denial of Service vulnerabilities in MCP SDK
DoS Protection - Additional denial of service vulnerability fixes
All Integrations Updated - Security patches applied across all MCP integrations

Control Panel

Mobile Card Layout - Clients list displays as cards on mobile devices
Responsive Design - Control panel adapts to screen size

Docker & Deployment

HTML Generation on Startup - SPA regeneration enabled by default on container start
Memory Optimization - Startup memory reduced from 1.6GB to ~500MB
Startup Metrics - Track memory usage during initialization
Path Fixes - HTML_STATIC_PATH environment variable trusted without existence checks
System Docs Copy - Missing system docs copied on container startup

Chat & UI

Dynamic Splash Screen - Chat splash screen content driven from markdown file
Move-to-Folder UI - Inline expansion for folder selection with mobile close button
Knowledge Panel Refresh - Panel refreshes automatically when Sasha creates MD files
Consistent Button Styling - Unified button styles across settings panels

Stability & Reliability

Mobile

Fixed Safari overlay transparency issues
Resolved header/input auto-hide animation smoothness
Fixed white box appearing when chat input clips
Prevented chat messages and input from overflowing viewport
Fixed sidebar close button z-index and visibility

Mermaid Diagrams

Fixed CDN loading with proper onload/onerror handlers
Resolved dynamic script injection timing issues
Fixed diagram rendering in SPA navigation
Decoded HTML entities in mermaid divs before rendering
Synced mermaid config between docs-router and main.js

Output Styles

Fixed path resolution using PROJECTS_ROOT
Handled sessions not yet in database gracefully
Corrected JSON response parsing in API calls
Fixed dropdown positioning with React Portal and fixed positioning

Docker

Fixed container workdir to use home directory
Corrected html-static path for CSS/JS assets
Allowed html-static/css and js in build context

General

Fixed docs loading to first real page instead of index
Fixed breadcrumb home navigation
Prevented authenticated users from seeing login page
Fixed folder creation when making new projects

Developer Experience

Documentation

Added mermaid rendering architecture and lessons learned guide
Documented output styles feature design and settings
Added MCP integrations architecture overview
Created memory optimization guide for Puppeteer

Skills

Added vibecoder-review skill for security reviews
Added check-container-db skill for debugging deployments
Added mcp-builder skill for creating MCP servers

Testing

Added automated MCP test runner
Created MCP utils for integration testing

Refactoring

Extracted QuickDiff component to shared file
Separated local Claude config from container deployment
Updated agent frontmatter to Claude Code subagent format

Upgrade Notes

Mobile Usage

No Configuration Required: Mobile optimizations apply automatically
Safari Users: Clear cache if experiencing overlay issues
Touch Interactions: Sidebar now closes on item selection

Output Styles

Admin Setup: Create output styles in Settings → Rules → Styles
User Selection: Select style from dropdown before starting chat
Reporting: Output style appears in hook reports automatically

Welcome Emails

SMTP Required: Ensure SMTP settings configured for email delivery
Automatic: Emails send automatically when creating users through admin interface

Docker Deployments

Memory Improved: Containers now start with ~500MB instead of 1.6GB
HTML Generation: SPA regeneration enabled by default on startup

Changelog Summary (since v1.0.904)

Features

Mobile-first UI with auto-hide chrome and touch optimization
Per-session output style selection
Output styles management interface
Mermaid diagram rendering improvements
Welcome email for new user registration
Dynamic splash screen from markdown
Control panel mobile card layout
HTML generation enabled on startup by default
Startup memory metrics tracking

Fixes

Safari overlay and animation issues
Mermaid CDN loading and script injection
Output style path resolution and API parsing
Mobile sidebar close button visibility
Chat overflow on mobile devices
Docker path and workdir issues
Docs loading and breadcrumb navigation

Security

Patched ReDoS vulnerabilities in MCP SDK
Fixed DoS vulnerabilities across integrations

UI/UX

Auto-hide header and input on mobile scroll
Compact processing banner for mobile
Ellipsis menu for mobile chat actions
Inline folder selection expansion
Consistent button styling in settings

Looking Ahead

Per-Project Styles: Assign default output styles to projects
Style Analytics: Track which output styles produce best quality metrics
Mobile Gestures: Swipe navigation for faster mobile workflows
Offline Support: Cache knowledge base for offline mobile access
Style Templates: Pre-built style templates for common use cases

Jargon Buster - Technical Terms Explained

Output Styles

Configuration files that customize how Sasha formats responses
Like choosing between "brief" and "detailed" email settings
Each style can specify tone, format, length, and focus areas

Mermaid

A markdown-based diagramming language
Write text like graph TD; A-->B and it renders as a flowchart
Supports flowcharts, sequence diagrams, pie charts, and more

ReDoS (Regular Expression Denial of Service)

A vulnerability where specially crafted input causes regex to hang
Like a puzzle that takes forever to solve, blocking other work
The patches ensure regex patterns complete quickly regardless of input

Auto-Hide Chrome

"Chrome" means browser/UI controls, not the Google browser
Auto-hide means controls disappear when scrolling to show more content
Tap or scroll up to reveal them again

SPA (Single Page Application)

A web app that loads once and updates dynamically
The knowledge base uses SPA for fast navigation without page reloads
Requires proper script injection for features like Mermaid diagrams

Frontmatter

Metadata at the top of markdown files between --- markers
Output styles use frontmatter to define name, description, and settings
Enables Claude Code to read style configuration

Thanks for upgrading. This release makes Sasha truly mobile-ready while adding powerful response customization through output styles.