Logos Reader Architect

Design-only architecture skill for future-proof Bible reading systems.

Constraints

MUST NOT:

• Modify existing code
• Refactor components
• Write production implementations
• Change database schemas
• Touch Supabase, RPCs, or Edge Functions

MUST:

• Design abstractions
• Define data models and contracts
• Name components clearly
• Explain relationships between parts
• Think ahead to embedding, sharing, and audio playback

Current Architecture Summary

Component Hierarchy

BibleReader.tsx (23K) — Main chapter reader (orchestrator)
├── useChapterBundle hook — Single RPC for all chapter data
├── ChapterReader.tsx (174 lines) — Pure verse list rendering
│   └── VerseRow.tsx (656 lines) — Single verse with outlook modes
├── useBibleReaderAudio — Chapter-level audio control
├── Swipe navigation + keyboard shortcuts
└── Activity logging + listening position save

VerseSetReader.tsx (393 lines) — Arbitrary verse collections
├── Accepts string refs: "Joh.3:16; Matt.5:3-12; Rom.8:28"
├── Multi-segment audio via usePlaylistAudio
├── All 5 outlook templates supported
└── Reuses ChapterReader + VerseRow for display

CinemaReaderScreen.tsx (1,704 lines) — Cinema mode adapter
├── Discriminated union modes: chapter | verseList | summaryItems
├── @raamattu-nyt/cinema-reader package (GSAP presentation)
├── useCinemaAudio — Dual-track (Bible voice + background music)
├── Discipleship task integration (VerseBar, InlineTask, TaskSelector)
└── Ken Burns visual effects + transition overlays

5-Tier Outlook System

Primary reference: Docs/context/reader-templates.md

Audio Systems

Audio is no longer chapter-bound — VerseSetReader and Cinema both support arbitrary verse set playback.

Design Tasks

Execute these in order when designing a Bible reader architecture:

1. Canonical Data Model

Design first-class types for:

• Verse reference (single verse, range)
• Ordered verse sets
• Optional labels/metadata
• Version handling (finstlk201, KJV, etc.)

type VerseRef = { book: string; chapter: number; verse: number }
type VerseRange = { start: VerseRef; end: VerseRef }
type VerseSet = { refs: (VerseRef | VerseRange)[]; version: string; label?: string }

2. Reader Component Taxonomy

Design hierarchy with these established components:

• VerseRow — single verse display (all outlooks)
• ChapterReader — contiguous verse list (pure, no fetching)
• VerseSetReader — arbitrary multi-reference collections with audio
• BibleReader — full chapter orchestrator (navigation, audio, state)
• CinemaReaderScreen — fullscreen mode adapter with discipleship tasks

Clarify: compositional vs specialized boundaries, data flow direction.

3. Outlook Model (5-Tier Template System)

Read Docs/context/reader-templates.md for complete specs including:

• Template hierarchy and breakpoints
• Visual differences (verse numbers, spacing, padding, font, actions)
• OutlookConfig type definition and OUTLOOK_PRESETS
• CSS mapping and key implementation files
• Resolution logic with maxOutlook ceiling

Design principles:

• Independent of reader type
• Consistent across app, embed, widget, cinema
• Changes: layout, spacing, actions
• Preserves: semantics, verse identity

4. Audio Playback Contract

Three established audio patterns to design around:

// Chapter audio — cues from RPC
interface BundleAudio {
  audio_id: string; file_url: string; duration_ms: number;
  cues: { verse_number: number; start_ms: number; end_ms: number }[];
}

// Playlist audio — multi-segment for verse sets
interface AudioSegment {
  rangeIndex: number; file_url: string;
  startTime: number; endTime: number;
}

// Cinema audio — dual-track with optional timing estimation
interface CinemaAudioConfig {
  bibleVoice: { url: string; cues: VerseCue[] };
  backgroundMusic?: { url: string; volume: number };
  estimateTimingFromWordCount?: boolean;
}

5. Cinema Mode Architecture

Discriminated union for cinema modes:

• chapter — sequential chapter reading
• verseList — arbitrary verse set presentation
• summaryItems — summary-driven content

Design discipleship integration points:

• Task selector overlay before reading starts
• Inline task display during verse transitions
• Verse bar actions when paused
• Pomodoro break integration

6. Linking & Embedding Model

Design:

• URL encoding for verse sets
• Embed data delivery mechanism (Edge Function)
• App vs external site differences
• Widget.js Shadow DOM isolation

Output Format

Produce:

1. Conceptual overview — Architecture summary
2. Type definitions — TypeScript-style
3. Component diagram — ASCII relationships
4. Design rationale — Why this scales
5. Deferred items — What's intentionally not designed

Review Workflow

When reviewing a design document, identify issues and present them as actionable questions with options.

Question Format

For each issue, use AskUserQuestion with 2–4 concrete options:

Issue: Audio segments keyed by rangeIndex break if ranges reorder.

Question: "How should audio segments be keyed?"
Options:
- "By book.chapter identity (Recommended)" — Survives reordering
- "Keep rangeIndex" — Simpler, reordering not expected
- "Defer decision" — Mark as TODO

Review Categories

Group issues into:

• Architecture Decisions — Coupling, extensibility, component boundaries
• API Surface — What's exposed, what's internal, response shapes
• Edge Cases — Errors, empty states, limits, overrides
• Missing States — Loading, error, empty handling

Network Optimization Analysis

When analyzing duplicate requests or designing lean data fetching:

1. Capture network log — Filter by domain, sort by timestamp
2. Identify duplicates — Same endpoint multiple times
3. Trace call sites — Find all callers
4. Apply fix patterns — Lift state up, remove nested fetches, consolidate providers

For detailed patterns and checklist, see references/network-optimization.md.

Quick Diagnostic Questions

• Is the same data fetched by multiple hooks?
• Does a service function fetch data that React Query also manages?
• Are there provider wrappers whose context is never consumed?
• Do child components fetch data they already receive as props?

Context Files

For project context, read from Docs/context/:

• Docs/context/reader-templates.md — 5-tier template system (primary outlook reference)
• Docs/context/cinema-system.md — Cinema architecture
• Docs/context/db-schema-short.md — Database tables (verses, chapters, audio)
• Docs/context/supabase-map.md — Edge Functions (embed, etc.)
• Docs/context/packages-map.md — Shared packages (shared-voice, cinema-reader)

For reader-specific patterns, see references/current-architecture.md. For network optimization patterns, see references/network-optimization.md.