Sasha Studio Release Notes: v1.0.1068 to v1.0.1121

Release Period: January 2026 - February 2026
Version Range: 1.0.1068 → 1.0.1121
Total Commits: 140
Actual Code Changes: 344 files changed, 13,144 insertions, 1,808 deletions

TL;DR - Business Summary

What's New in Plain English:

This release delivers 5 major capabilities that make Sasha smarter, more organized, and more interactive:

Interactive Prompt Cards - When Claude asks you a question during a conversation, you now see clickable option cards instead of plain text. Pick your answer with a tap instead of typing it out.
Knowledge Tags & Filtering - Tag your knowledge documents with categories and filter them instantly. Find what you need without scrolling through long lists.
Resizable & Fullscreen Previews - Drag-resize the sidebar and doc preview panel to your preferred width. Go fullscreen on document previews for deep reading.
PostHog Analytics - Product analytics integration gives you visibility into how your team uses Sasha, enabling data-driven decisions about training and adoption.
SEO & Public Pages - New public about page with sitemap and robots.txt for search engine visibility, helping prospective users discover your Sasha instance.

Business Value:

Productivity: Interactive prompts reduce conversation friction — answer Claude's questions with one click
Organization: Tags and sorting modes make large knowledge bases navigable
Adoption: Analytics show which features your team actually uses
Discoverability: SEO improvements help new users find your Sasha instance

Executive Summary

This release transforms how users interact with Claude's questions and how they organize knowledge. The headline feature is Interactive Prompt Cards — a complete redesign of how Claude's AskUserQuestion and ExitPlanMode tools appear in the chat. Instead of raw text output, users now see styled, clickable cards with clear options. This required deep changes to the streaming pipeline, WebSocket handlers, and message reconciliation system.

The Knowledge Management system received substantial upgrades: frontmatter-based tags with inline editing, multiple sort modes (alphabetical, date, type), file-type-specific icons, and smart file display logic that shows HTML previews instead of raw markdown when available. A deploy-time backfill script adds created dates to all existing documents.

On the infrastructure side, PostHog analytics integration provides product usage insights, a new memory monitor utility prevents OOM situations, and 78 Dependabot security alerts were resolved through dependency overrides. The system prompt injection system was formalized with a registry and structured logging, making it easier to audit and maintain the invisible prompts that shape Claude's behavior.

Major Features & Improvements

Interactive Prompt Cards

AskUserQuestion Rendering - Claude's questions now display as styled interactive cards with clickable option buttons
ExitPlanMode Card - Plan review prompts render with expandable plan content and blue/gray design system
Streaming Integration - Interactive prompts emit via claude-interactive-prompt events, wired into active WebSocket handlers
Deduplication - Prompt cards are deduplicated after history reconciliation to prevent duplicates on page reload
Streaming Order Fix - Interactive prompts no longer appear before or replace streaming text content
Suppressed Fallbacks - Claude's text-based fallback output and error tool_results are suppressed when interactive cards are active

Knowledge Tags & Organization

Frontmatter Tags - Add tags to knowledge documents via YAML frontmatter (tags: [sales, onboarding])
Inline Tag Editing - Right-click any document in the sidebar to edit its tags
Tag Filtering - Filter the Knowledge sidebar by tags with a collapsible tag selector (+N popover for overflow)
File Manager Tags - Tag filter system also available in the File Manager view
Sort Modes - Toggle between alphabetical, date-modified, and file-type sorting in the Knowledge sidebar
File-Type Icons - Documents display type-specific icons (PDF, CSV, HTML, MD, etc.) instead of generic file icons
Smart File Display - Sidebar shows HTML preview versions instead of raw markdown when available; shows .md files in file manager even when HTML counterpart exists
Created Dates - All markdown file creation paths now inject created frontmatter; deploy-time backfill script adds dates to existing documents

UI/UX Improvements

Resizable Sidebar - Drag handle lets you resize the sidebar to your preferred width
Resizable Doc Preview - Document preview panel is independently resizable
Fullscreen Preview - Toggle document previews to fullscreen for focused reading
Collapsible Bottom Action Bar - Action bar collapses when not needed
Truncatable User Messages - Long user messages can be collapsed with configurable settings
Plan Review Cards - Open by default with unified blue styling and expand/collapse
Trailing Question Highlighting - Questions at the end of assistant messages are highlighted with a blue block
Show Work in Progress Toggle - Quick Settings toggle to show/hide in-progress indicators
Document Search in History - Search palette now includes document search results

Analytics & SEO

PostHog Integration - Product analytics for tracking feature usage and user behavior
Response Types Chart Improvements - Value labels and y-axis labels added to analytics charts
Historical Session Data - Host activity report now includes historical session data
Public About Page - SEO-optimized public page for search engine discovery
Sitemap & Robots.txt - Standard SEO files for search engine crawling
Project Limit Setting - Historian project limit now configurable from the UI

System Architecture

System Prompt Injection Registry - Formalized registry with structured 📋 [SYSTEM-PROMPT] logging for all injections
AskUserQuestion Injection - New system prompt injection that enables Claude to render interactive question cards
Isolated Temp Directories - Each Claude CLI process gets its own temp directory to prevent cross-session file conflicts
GitHub Token Seeding - SASHA_GITHUB_TOKEN automatically seeded into secretstore on boot
Memory Monitor Utility - New utility for tracking and alerting on memory consumption
SIGTERM/143 Diagnostics - Comprehensive error diagnostics when Claude processes are terminated

Stability & Reliability

Streaming & Message Pipeline

Object Serialization Fix - Prevented [object Object] loss in the message pipeline by using JSON.stringify
Chunk Deduplication - Consecutive identical chunks are deduplicated in the streaming buffer layer
Final Output Fix - Resolved issue where final output was missing until page refresh
Tool Result Indicators - Gray indicator shown for tools with missing results in historic sessions
Thinking Indicator - Respects showThinking setting for in-progress indicators

Knowledge System

DOCS_ROOT Search Path - Added to conversation docs search paths for reliable file discovery
CSV/HTML/TXT Support - Sidebar now shows these file types alongside markdown
HTML Preview Whitelist - HTML added to raw previewable extensions
Simplified File Discovery - Streamlined to include project root

Security

78 Dependabot Alerts Resolved - Dependency overrides for known vulnerabilities
Health Endpoint Auth - Authentication added to health check API calls
MCP Health Check Consolidation - Startup MCP checks consolidated to prevent OOM from concurrent checks
JWT Error Logging - Improved logging for secret rotation scenarios
Per-Client Health Secrets - Host activity reports use per-client health check secrets

Process Management

Claude Historian Sort Fix - Projects sorted by mtime to find most recent sessions
Absolute Paths for Uploads - @ references on uploaded files now use absolute paths
Multi-line JSON Parsing - Stats handle multi-line JSON in events.jsonl

Developer Experience & Docs

Documentation Updates

System Prompt Injection Registry - Complete documentation of all 6 active injections with mandatory process for adding new ones
Interactive Prompt Cards - Architecture and streaming integration documentation
Interactive Prompt Redesign - Design spec for the blue/gray card system
Knowledge Tags - Feature documentation for the tagging system
Knowledge Frontmatter Dates - Documentation for the created-date backfill system
Knowledge Sidebar Sort Modes - Documentation for sorting feature
Knowledge File System - Updated file discovery documentation
Message Pipeline - Documentation for the message serialization pipeline
Claude CLI Tool Result Handling - Technical documentation for tool result suppression
PostHog Integration - Analytics setup and configuration guide
Host Activity Reporting - Feature documentation
Streaming Order Decision - ADR for interactive prompt streaming order (issue #438)

New Features for Developers

Start New Project - "Start new project" option in folder context menu
Navigation to Chat - Top menu bar Chat button now navigates properly

Upgrade Notes

Interactive Prompt Cards

Automatic: All AskUserQuestion and ExitPlanMode responses from Claude now render as interactive cards
No Configuration Needed: Works with existing conversations
Fallback: If card rendering fails, plain text output is still available

Knowledge Tags

Backfill Script: Run node scripts/add-frontmatter-dates.js to add created dates to existing documents
Deploy-Time: Backfill runs automatically during Docker deployment
Tags Format: Add tags: [tag1, tag2] to document frontmatter

PostHog Analytics

Configuration: Set PostHog API key as build argument for Docker (POSTHOG_KEY)
Privacy: Analytics are opt-in and respect user preferences
No User Action Required: Analytics are disabled by default without a key

Breaking Changes

None: All changes are backward compatible

Changelog Summary (since v1.0.1068)

Features

Interactive prompt cards for AskUserQuestion and ExitPlanMode
Knowledge frontmatter tags with inline editing and filtering
File-type-specific icons in Knowledge sidebar
Toggleable sort modes (alpha, date, type) in Knowledge sidebar
Resizable sidebar and doc preview panel with drag handles
Fullscreen toggle for document preview
Collapsible bottom action bar
Truncatable user messages with configurable limits
Document search in history search palette
Plan review card redesign with blue/gray system
Trailing question highlighting in assistant messages
"Show work in progress" toggle in Quick Settings
PostHog analytics integration
Public about page with sitemap and robots.txt
System prompt injection registry with structured logging
AskUserQuestion system prompt injection
Isolated temp directories per Claude CLI process
GitHub token seeding into secretstore on boot
SIGTERM/143 diagnostic messages
Configurable project limit for historian
PDF download from preview panel
Historical session data in host activity reports
Value labels and y-axis on Response Types chart
"Start new project" in folder menu
File rename in Knowledge sidebar context menu
Support renaming MD-generated HTML files via source markdown

Fixes

78 Dependabot security alerts resolved via dependency overrides
[object Object] serialization loss in message pipeline
Streaming chunk deduplication in buffer layer
Final output missing until page refresh
Interactive prompt deduplication after history reconciliation
Interactive prompt streaming order (appears after text, not before)
Claude text fallback suppression with interactive prompts
Tool result error suppression from CLI stream
MCP health check consolidation to prevent OOM
Health endpoint authentication
Per-client health check secrets for host activity
Knowledge sidebar file-type icons applied correctly
MD files hidden in sidebar when HTML version exists
CSV, HTML, TXT files shown in Knowledge sidebar
DOCS_ROOT added to conversation docs search paths
HTML added to previewable extensions whitelist
Claude historian projects sorted by mtime
Absolute paths for @ references on uploaded files
Multi-line JSON parsing in events.jsonl
Sidebar resize handle hidden during fullscreen
Navigation added to Chat menu button
Knowledge articles refresh on section expand
Streaming message repetition prevention
Gray indicator for tools with missing results in history
showThinking setting respected for in-progress indicator

Looking Ahead

Smart Tag Suggestions: AI-powered tag recommendations based on document content
Interactive Prompt History: Browse and revisit past prompt card interactions
Knowledge Dashboard: Visual overview of document coverage, tags, and freshness
Team Analytics: Usage patterns by team and role via PostHog
Document Relationships: Automatic linking between related knowledge articles

Jargon Buster - Technical Terms Explained

Interactive Prompt Cards

Clickable UI cards that appear when Claude asks you a question during chat
Like a multiple-choice form embedded in the conversation
Replaces plain text questions with a visual, click-to-answer interface

Frontmatter

Metadata at the top of a markdown file between --- markers
Like the label on a folder — contains tags, dates, and other organizational info
Used by Sasha to add tags and creation dates to knowledge documents

System Prompt Injection

Invisible instructions sent to Claude alongside your conversation
Like whispering context to an assistant before they talk to a customer
Controls Claude's behavior (e.g., persona, guides, plan mode)

WebSocket

A persistent connection between your browser and the server for real-time updates
Like keeping a phone line open instead of hanging up after each sentence
Enables streaming responses and interactive prompt card delivery

PostHog

Open-source product analytics platform
Like Google Analytics but for understanding feature usage within your app
Tracks which Sasha features your team uses most

Dependabot

GitHub's automated security scanner that flags vulnerable dependencies
Like a security guard checking your building's suppliers
78 alerts were resolved by updating or overriding affected packages

OOM (Out of Memory)

When a process tries to use more memory than available
MCP health checks were consolidated to prevent too many running at once
Memory monitor utility now provides early warnings

SIGTERM/Signal 143

An operating system signal telling a process to shut down
Like a manager tapping someone on the shoulder to wrap up
New diagnostics explain why a Claude process was terminated

Frontmatter Backfill

Adding metadata to existing documents that didn't have it
Like going through old filing cabinets and stamping dates on unlabeled folders
Runs automatically during deployment to ensure all docs have creation dates

Thanks for upgrading. This release makes Sasha more interactive with clickable prompt cards, more organized with knowledge tags and sorting, and more observable with analytics — all while resolving 78 security alerts and hardening the streaming pipeline.