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AI-powered summaries

Kafka offers AI-generated summaries for books, helping you quickly understand a book’s content before committing to reading it.

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Overview

The AI summary feature uses OpenAI’s language models to generate concise, informative summaries of books. This helps you:
  • Decide what to read: Get an overview before diving into a long book
  • Recall content: Refresh your memory about books you’ve read
  • Discover themes: Understand key topics and themes quickly
  • Save time: Get insights without reading full descriptions
AI summaries are powered by OpenAI and are available for select text items. This feature can be enabled or disabled via remote configuration.

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Accessing summaries

To view an AI-generated summary:
1

Open an item detail page

Navigate to any book or text item
2

Look for the summary button

Find the “Read Summary” button (appears for eligible items)
3

Tap to view

Tap the button to open the summary screen

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Summary display

The summary screen shows:

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Header information

  • Book title: Displayed prominently in primary color
  • Author/Creator: Clickable link to view more works by this creator
  • Divider: Visual separation between header and content

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Summary content

The AI-generated summary is displayed with:
  • Markdown formatting: Proper structure with headings, lists, and paragraphs
  • Custom typography: Optimized for readability
    • Appropriate line height
    • Comfortable font sizes
    • Material Design typography scale
  • Scrollable content: Summary can be as long as needed
  • Back button: Return to the item detail page
  • Scroll: Swipe up/down to read the full summary
  • Creator link: Tap the author name to browse their other works

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How it works

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AI generation process

  1. Request triggered: When you tap “Read Summary”, Kafka requests a summary from OpenAI
  2. Content analysis: The AI analyzes the book’s metadata and available text
  3. Summary creation: A concise summary is generated highlighting:
    • Main themes and topics
    • Key concepts or arguments
    • Genre and style
    • Notable aspects or significance
  4. Display: The summary is formatted and displayed in the app

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OpenAI integration

Kafka integrates with OpenAI’s API:
  • API key configured via Firebase Remote Config
  • Secure, server-side API calls
  • Content moderation and filtering
  • Error handling for API issues
The OpenAI API key and summary generation settings are managed remotely, allowing the feature to be configured without app updates.

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Availability

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When summaries are available

AI summaries are shown when:
  • The item is a text/book (not audio)
  • The feature is enabled via remote config
  • Sufficient metadata is available
  • OpenAI API is accessible

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When summaries aren’t available

The summary button may not appear if:
  • The item is an audiobook (audio-only)
  • The feature is disabled remotely
  • The item lacks necessary metadata
  • API quota or connectivity issues

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Feature configuration

The AI summary feature is controlled by:

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Remote config flags

  • summary_enabled: Master toggle for the feature
  • open_ai_api_key: API authentication

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Firebase integration

Summaries are:
  • Generated on-demand
  • May be cached for performance
  • Logged for analytics

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Best practices

Read the summary first to determine if a book matches your interests. Summaries are especially helpful for non-fiction, academic texts, or deciding between similar books.
AI-generated summaries are helpful overviews but may not capture every nuance. They work best as a starting point, not a replacement for reading the actual book.
Use summaries alongside subject tags, ratings, and descriptions to make informed reading choices. Check the creator’s other works to understand their style.

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Technical details

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Implementation

Location: ~/workspace/source/ui/summary/ Key components:
  • SummaryScreen.kt: Main UI component
  • SummaryViewModel: State management and data fetching
  • Markdown rendering: Using mikepenz/markdown-m3 library
  • Typography: Custom styles for enhanced readability

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Data model

data class SummaryState(
    val title: String = "",
    val creator: String? = null,
    val summary: Summary? = null,
    val isLoading: Boolean = false
)

data class Summary(
    val content: String
)

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Typography customization

The summary uses custom typography for:
  • Headings (h1-h6)
  • Body text
  • Code blocks
  • Lists and quotes
Optimized for:
  • Line spacing for readability
  • Comfortable font sizes
  • Clear hierarchy
  • Material Design integration

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Future enhancements

Potential improvements being considered:
  • Offline caching: Store previously viewed summaries
  • Multiple languages: Summaries in different languages
  • Summary length options: Choose between brief, standard, or detailed summaries
  • Audio narration: Listen to summaries instead of reading
  • Comparison mode: Compare summaries of similar books

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Privacy and data

When you request a summary, book metadata is sent to OpenAI’s servers. No personal information is included, and OpenAI’s privacy policy applies to the summary generation process.
Data handling:
  • Book titles and metadata only
  • No user identification
  • No reading history shared
  • Summaries may be cached locally

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Troubleshooting

If summaries aren’t loading, check your internet connection. The feature requires active connectivity to generate summaries.
Common issues:
IssueSolution
”Read Summary” button not visibleFeature may be disabled remotely or item type not supported
Summary fails to loadCheck internet connection, try again later
Incomplete summaryAPI may have timed out, try refreshing
Summary in wrong languageCurrently summaries are generated in English
  • Item Details: View full book information and description
  • Files Browser: Download books for offline reading
  • Search: Find books by topic, author, or genre

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