Agent Skills: Logos Reader Architect

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

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 (KR92, KJV, etc.)

// Example structure - customize per requirements
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:

• VerseRow - single verse display
• VerseGroup - contiguous verses
• VerseSetReader - arbitrary verse collections
• ChapterReader - full chapter (specialization)

Clarify: compositional vs specialized, chapter-awareness boundaries.

3. Outlook Model (5-Tier Template System)

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

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

• Template hierarchy and breakpoints
• Visual differences (verse numbers, spacing, padding, font, actions)
• OutlookConfig type definition
• OUTLOOK_PRESETS values
• CSS mapping
• Key implementation files

Design principles:

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

4. Audio Playback Contract

Design abstraction that:

• Operates on ordered verse lists (not chapters)
• Emits verse cue events
• Drives active verse highlighting
• Reusable by any reader component

// Example interface
interface AudioController {
  play(verses: VerseRef[]): void
  onVerseCue: (ref: VerseRef) => void
  onComplete: () => void
}

5. Linking & Embedding Model

Design:

• URL encoding for verse sets
• Embed data delivery mechanism
• App vs external site differences

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. This makes decisions faster and clearer.

Question Format

For each issue found, use AskUserQuestion tool 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, more robust
- "Keep rangeIndex" - Simpler, reordering not expected
- "Defer decision" - Mark as TODO, decide later

Review Categories

Group issues into these categories and present as multi-select or sequential questions:

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

Final Confirmation

After collecting decisions, always ask:

"Update the design document with these decisions?"
Options:
- "Yes, update now"
- "Show me the changes first"
- "No, just note for later"

Example Review Output

Instead of:

"Line 56: rangeIndex ties audio directly to parsing order. If you reorder ranges, audio breaks. Consider keying by book.chapter identity instead."

Use AskUserQuestion:

Audio Segment Keying rangeIndex ties audio to parsing order - reordering ranges breaks playback.

Options:

1. "Key by book.chapter identity (Recommended)" - Survives reordering
2. "Keep rangeIndex" - Simpler if reorder never happens
3. "Add both keys" - rangeIndex for order, identity for lookup

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 - grep -rn "functionName" src/
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 reference for outlook design)
• 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, etc.)

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