Astrology Backend Integration

This skill guides the implementation of vedic astrology backends that integrate astrology APIs with AI/LLM systems for predictions and consultations. It captures domain-specific patterns, data structures, and best practices for astrology applications.

When to Use This Skill

Apply this skill when you need to:

• Build vedic astrology consultation platforms
• Integrate astrology APIs (AstrologyAPI.com, Prokerala, etc.)
• Generate and store kundlis (birth charts)
• Implement dasha-based predictions
• Detect doshas (Manglik, Pitra, etc.)
• Provide gemstone/rudraksha recommendations
• Create AI-powered astrology consultants
• Support family/member chart management
• Build compatibility/matching systems

Prerequisites

Before using this skill, you should have:

• Completed the ai-integrated-api-backend skill (or understand external API + AI integration)
• Basic understanding of vedic astrology concepts
• Access to an astrology API provider

Astrology Domain Fundamentals

Core Concepts

Kundli (Birth Chart)

• Complete astrological profile of a person
• Requires: Date, Time, Location (lat/long) of birth
• Timezone: Critical for accuracy (default IST = 5.5 for India)
• Components: Charts, planets, dasha, doshas, remedies

Charts (Divisional Charts)

• D1 (Rashi Chart): Main birth chart, 12 houses
• D9 (Navamsa): Marriage and spiritual chart
• Other divisional charts (D10, D60, etc.) for specific life areas

Houses (Bhava)

• 12 houses representing life domains
• Critical mappings:
  • House 1: Self, health, personality
  • House 2: Wealth, family, speech
  • House 4: Mother, property, happiness
  • House 5: Children, education, creativity
  • House 7: Marriage, partnerships
  • House 10: Career, reputation, father
  • House 11: Gains, friends, aspirations
  • House 12: Losses, spirituality, foreign lands

Planets (Grahas)

• 9 planets in vedic astrology:
  • Sun (Surya): Authority, self, ego
  • Moon (Chandra): Mind, emotions, mother
  • Mars (Mangal): Energy, courage, conflicts
  • Mercury (Budha): Communication, intellect
  • Jupiter (Guru): Wisdom, expansion, luck
  • Venus (Shukra): Love, relationships, luxury
  • Saturn (Shani): Discipline, karma, delays
  • Rahu: Desires, obsessions, foreign
  • Ketu: Detachment, spirituality, past life

Sign Lords (Zodiac Rulers)

• Each zodiac sign is ruled by a planet:
  • Aries → Mars
  • Taurus → Venus
  • Gemini → Mercury
  • Cancer → Moon
  • Leo → Sun
  • Virgo → Mercury
  • Libra → Venus
  • Scorpio → Mars
  • Sagittarius → Jupiter
  • Capricorn → Saturn
  • Aquarius → Saturn
  • Pisces → Jupiter

Dasha (Planetary Periods)

• Vimshottari Dasha: 120-year cycle
• Structure: Major (Mahadasha) → Minor (Antardasha) → Sub-minor (Pratyantar)
• Each planet rules for specific years
• Critical for timing predictions: "When will X happen?"

Doshas (Afflictions)

• Manglik Dosha: Mars in specific houses (1, 2, 4, 7, 8, 12)
  • Affects marriage compatibility
  • Measured as percentage (0-100%)
  • Cancellations exist (e.g., both partners Manglik)
• Pitra Dosha: Ancestral debt
  • Sun/Moon afflicted by Rahu/Ketu
  • Remedies: Puja, charity

Remedies

• Gemstones: Strengthen weak planets
  • Each planet has a gemstone (Ruby for Sun, Pearl for Moon, etc.)
  • Worn on specific finger, day, metal
  • Weight in carats specified
• Rudraksha: Beads for spiritual remedies
  • Different mukhi (faces) for different planets
  • Worn for protection and balance
• Puja/Mantras: Ritual remedies

Astrology API Integration Pattern

Step 1: Choose Astrology API Provider

Popular Options:

• AstrologyAPI.com (https://json.astrologyapi.com/)
• Prokerala API
• GeoVedic API
• AstroSage API

Common Features Needed:

• Birth chart generation (D1, D9)
• Planetary positions with nakshatra
• Vimshottari Dasha
• Dosha analysis (Manglik, Pitra, Kaal Sarp, etc.)
• Gemstone/Rudraksha suggestions
• Panchang (daily calendar)
• Compatibility/matching

Step 2: API Endpoint Mapping

Essential Endpoints (AstrologyAPI.com example):

Base URL: https://json.astrologyapi.com/

1. POST /v1/horo_chart/{chart_id}
   - Get D1 (chart_id=D1), D9 (chart_id=D9), etc.
   - Returns: List of 12 houses with sign and planets

2. POST /v1/planets
   - Get detailed planetary positions
   - Returns: Planet positions, retrograde status, nakshatra, longitude

3. POST /v1/astro_details
   - Get basic astrological details
   - Returns: Ascendant, rasi, nakshatra, etc.

4. POST /v1/current_vdasha
   - Get current dasha period
   - Returns: Major, minor, sub-minor planet and dates

5. POST /v1/current_vdasha_all
   - Get complete dasha timeline
   - Returns: All major/minor/sub-minor periods from birth to 120 years

6. POST /v1/manglik
   - Check Manglik dosha
   - Returns: Manglik status, percentage, explanation

7. POST /v1/pitra_dosha_report
   - Check Pitra dosha
   - Returns: Present/absent, explanation

8. POST /v1/basic_gem_suggestion
   - Get gemstone recommendation
   - Returns: Gemstone, metal, finger, day, deity, mantra, carat weight

9. POST /v1/rudraksha_suggestion
   - Get Rudraksha recommendation
   - Returns: Mukhi number, ruling planet, benefits

10. POST /v1/puja_suggestion
    - Get puja recommendations
    - Returns: Puja type, purpose, timing

Step 3: Base Payload Structure

Standard Birth Details Payload:

{
  "day": 15,           // Day of birth (1-31)
  "month": 6,          // Month (1-12)
  "year": 1990,        // Year (YYYY)
  "hour": 14,          // Hour in 24-hour format (0-23)
  "min": 30,           // Minute (0-59)
  "lat": 28.7041,      // Latitude (decimal)
  "lon": 77.1025,      // Longitude (decimal)
  "tzone": 5.5         // Timezone offset (5.5 for IST)
}

Critical Considerations:

• Timezone: MUST be accurate. Default IST = 5.5 for India
• Time Format: 24-hour format, NOT 12-hour AM/PM
• Coordinates: Use Google Maps Geocoding API or similar for accurate lat/long
• Date Validation: Ensure valid dates (no Feb 30, etc.)

Step 4: API Manager Implementation

Responsibilities:

• Authenticate with API (usually HTTP Basic Auth or API Key)
• Build payloads from user birth details
• Call multiple endpoints (charts, dasha, dosha, remedies)
• Handle API rate limits and errors
• Return structured responses

Key Pattern:

API Manager Methods:
- get_horo_chart(birth_details, chart_id) → D1/D9 chart
- get_planets(birth_details) → Planet positions
- get_dasha(birth_details) → Current dasha
- get_dasha_all(birth_details) → Complete timeline
- get_manglik(birth_details) → Dosha status
- get_gem_suggestion(birth_details) → Remedies

Parallel Fetching:

• Most endpoints are independent
• Fetch in parallel using async tasks (Celery, etc.)
• Reduces total time from 9×3s = 27s to ~3s

Data Storage Pattern

Database Schema Design

Collection 1: User Birth Details (user_metadata)

{
  "user_id": 12345,
  "dob_full_name": "John Doe",
  "dob_gender": "male",
  "dob_day": 15,
  "dob_month": 6,
  "dob_year": 1990,
  "dob_hour": 14,
  "dob_minute": 30,
  "dob_lat": 28.7041,
  "dob_long": 77.1025,
  "dob_city": "New Delhi",
  "dob_state": "Delhi",
  "created_on": "2024-01-15T10:00:00Z",
  "updated_on": "2024-01-15T10:00:00Z"
}

Collection 2: Raw Astrology Data (user_astro_metadata)

{
  "user_id": 12345,
  "astro_details": { /* API response */ },
  "horo_d1_chart_data": { /* D1 chart response */ },
  "horo_d9_chart_data": { /* D9 chart response */ },
  "planet_chart_data": { /* Planets response */ },
  "current_vdasha": { /* Current dasha */ },
  "current_vdasha_all": { /* Complete dasha */ },
  "manglik": { /* Manglik dosha */ },
  "pitra_dosha_report": { /* Pitra dosha */ },
  "basic_gem_suggestion": { /* Gemstone */ },
  "rudraksha_suggestion": { /* Rudraksha */ },
  "created_on": "2024-01-15T10:05:00Z",
  "updated_on": "2024-01-15T10:05:00Z"
}

Why Two Collections?

• Birth details rarely change (immutable)
• Astrology data can be refreshed (dasha changes over time)
• Separation allows independent updates

Family/Member Support

Collection 3: Family Member Birth Details (user_member_metadata)

{
  "_id": "member_unique_id",
  "user_id": 12345,
  "relation": "spouse",
  "dob_full_name": "Jane Doe",
  "dob_gender": "female",
  "age": 32,
  "dob_day": 20,
  "dob_month": 8,
  "dob_year": 1992,
  // ... same birth detail fields
}

Collection 4: Family Member Astrology Data (user_member_astro_metadata)

{
  "user_id": 12345,
  "member_id": "member_unique_id",
  // ... same astro data fields as user_astro_metadata
}

Relation Types:

• "self" (primary user)
• "spouse", "mother", "father"
• "son", "daughter", "child"
• "brother", "sister"
• Custom relations as needed

Kundli Transformation Pattern

Problem Statement

Challenge: API responses are nested, verbose, and use inconsistent key naming. Need to transform into clean, AI-friendly structure.

Example API Response Issues:

• Mixed case keys: "Sign", "sign", "SIGN"
• Verbose: "The person is 28.5% Manglik due to Mars in 7th house..."
• Nested deeply: houses → sign → planets → details
• String format: "Mars(Retrograde)" instead of structured data

Solution: Multi-Step Transformation Pipeline

Step 1: Normalize Keys

• Convert all keys to lowercase
• Recursively process nested objects
• Standardize array structures

Step 2: Transform Charts

• Convert house list to dictionary (house number → details)
• Extract sign from each house
• Map sign to sign lord (Aries → Mars)
• Extract planets in each house

Step 3: Enrich Planets

• Parse planet strings: "Mars(Retrograde)" → {name: "Mars", isRetrograde: true}
• Add nakshatra, longitude, position
• Mark benefic/malefic status

Step 4: Build Dasha Timeline

• Parse date strings to ISO format
• Filter realistic window (e.g., 2010 to current_year + 25)
• Structure major → minor → sub-minor hierarchy

Step 5: Extract Dosha Values

• Reduce verbose reports to key values
• Manglik: Extract percentage only
• Pitra: Extract present/absent only

Step 6: Format Remedies

• Gemstone: Extract name, metal, finger, day, carat
• Rudraksha: Extract mukhi, planet, benefits

Output: Complete Kundli Structure

Relation with user: self

Birth Details:
  name: John Doe
  gender: male
  date_of_birth: 15 Jun 1990
  time_of_birth: 02:30 PM
  place_of_birth: New Delhi, Delhi

D1 Chart:
  House 1:
    sign: Aries
    sign_lord: Mars
    planets:
      - name: Sun
        isRetrograde: false
        nakshatra: Ashwini
        longitude: 65.23
      - name: Mercury
        isRetrograde: true
        nakshatra: Bharani
        longitude: 72.45
  House 2:
    sign: Taurus
    sign_lord: Venus
    planets: []
  # ... Houses 3-12

D9 Chart:
  # Same structure as D1

Dasha Timeline:
  - major_planet: Venus
    start_date: 2015-05-01
    end_date: 2035-05-01
    minor_periods:
      - planet: Venus
        start_date: 2015-05-01
        end_date: 2018-09-01
      - planet: Sun
        start_date: 2018-09-01
        end_date: 2019-09-01
      # ... more minor periods

Current Dasha:
  major: Venus
  minor: Moon
  sub_minor: Mars

Doshas:
  manglik_percentage: 28.5
  pitra_dosha_present: false

Remedies:
  gemstone:
    name: Diamond
    metal: Silver
    finger: Middle
    day: Friday
    carat: 2-3
  rudraksha:
    mukhi: 6
    ruling_planet: Venus
    benefits: "Harmony, love, relationships"

AI Prompt Integration Pattern

Context Assembly

Components to Inject:

1. Complete kundli (YAML format above)
2. Query-specific house mapping
3. Gender-aware interpretation rules
4. Current dasha for timing
5. Language preference (Hindi/English)

System Prompt Structure:

You are an expert Vedic astrologer with deep knowledge of:
- Planetary positions and aspects
- House significations
- Dasha timing predictions
- Dosha analysis and remedies

User's Complete Birth Chart:
<kundli>
[YAML kundli structure here]
</kundli>

Query Analysis Rules:
- Marriage questions → Focus on House 7, Venus, Jupiter
- Career questions → Focus on House 10, Saturn, Sun
- Finance questions → Focus on House 2, 11, Jupiter
- Health questions → Focus on House 1, 6, planets in these houses
- Children questions → Focus on House 5, Jupiter
- Property questions → Focus on House 4, Mars

Gender-Specific Rules:
- For females: Jupiter = husband, Venus = marriage
- For males: Venus = wife, Mars = passion

Timing Predictions:
- Use current dasha: [Major/Minor/Sub-minor]
- Consider transits for immediate events
- Dasha changes indicate life phase shifts

Response Format:
- Provide predictions based on chart analysis
- Cite specific planetary positions
- Mention relevant dasha periods
- Suggest remedies if doshas present
- Answer in [Hindi/English] as per user preference

Query-Specific Context

Marriage Query Example:

Query: "When will I get married?"

Additional Context:
- House 7 analysis: [Sign, Lord, Planets]
- Venus position: [House, Sign, Strength]
- Jupiter position: [House, Sign, Strength]
- Current dasha: [Will marriage planet dasha start soon?]
- Manglik dosha: [If yes, mention in prediction]

Prediction Approach:
1. Check House 7 lord strength
2. Check Venus/Jupiter periods in dasha
3. Look for favorable transits
4. Consider dosha impacts

Career Query Example:

Query: "What career is best for me?"

Additional Context:
- House 10 analysis: [Sign, Lord, Planets]
- Sun position: [Authority, leadership]
- Saturn position: [Discipline, perseverance]
- Mercury position: [Communication, intellect]
- Strongest planet in chart: [Natural talent]

Prediction Approach:
1. Identify dominant planets
2. Map to career domains (Sun→govt, Mercury→business, etc.)
3. Check House 10 lord placement
4. Consider current dasha planet's signification

Advanced Features

Compatibility/Matching (Kundli Milan)

Ashtakoot System (8-point matching):

1. Varna (1 point): Spiritual compatibility
2. Vashya (2 points): Mutual attraction
3. Tara (3 points): Birth star compatibility
4. Yoni (4 points): Physical compatibility
5. Graha Maitri (5 points): Mental compatibility
6. Gana (6 points): Temperament
7. Bhakoot (7 points): Love and affection
8. Nadi (8 points): Health and progeny

Total: 36 points maximum

• 18-24: Average match
• 25-32: Good match
• 33-36: Excellent match

Implementation:

• Requires both kundlis
• Call matching API endpoint
• Display point breakdown
• Highlight manglik cancellation if both Manglik

Panchang (Daily Calendar)

Components:

• Tithi (lunar day)
• Vara (weekday)
• Nakshatra (lunar mansion)
• Yoga (sun-moon combination)
• Karana (half-tithi)

Use Cases:

• Muhurat selection (auspicious timing)
• Festival dates
• Daily horoscope context

Transit Predictions

Current Planetary Positions:

• Fetch current date planetary positions
• Compare with birth chart
• Identify aspects (conjunction, opposition, trine, square)
• Predict short-term events

Implementation Checklist

Phase 1: API Setup

• Choose astrology API provider
• Set up authentication credentials
• Test all required endpoints
• Map API responses to internal models
• Implement error handling for API failures

Phase 2: Data Models

• Create birth details schema (user_metadata)
• Create astrology data schema (user_astro_metadata)
• Create member schemas for family support
• Add indexes (user_id, member_id)
• Plan data retention policy

Phase 3: Kundli Builder

• Implement key normalization
• Transform charts (D1, D9)
• Enrich planet details
• Build dasha timeline
• Extract dosha values
• Format remedies
• Test with sample API responses

Phase 4: AI Integration

• Design system prompt with kundli context
• Map query types to house focus
• Add gender-aware rules
• Include dasha in timing predictions
• Support Hindi/English responses
• Test predictions for accuracy

Phase 5: Features

• User onboarding (birth details collection)
• Location autocomplete (Google Maps API)
• Kundli generation and display
• Family member management
• Compatibility matching
• Dosha detection and remedies
• Panchang integration
• Daily horoscope

Phase 6: Optimization

• Cache kundli data (10-60 min TTL)
• Parallel API calls (async tasks)
• Compress large kundli context
• Monitor API usage and costs
• Implement rate limiting

Phase 7: Quality Assurance

• Validate timezone accuracy
• Test edge cases (midnight births, DST)
• Verify dasha calculations
• Check dosha logic
• User acceptance testing with astrologers
• Multilingual testing

Best Practices

Accuracy First

1. Timezone is Critical: Always use accurate timezone offset
2. Coordinates Matter: Get precise lat/long from geocoding
3. Time Format: Use 24-hour format, validate AM/PM conversions
4. Date Validation: Check for valid dates, leap years

Data Management

1. Separate Birth Data from Astrology Data: Birth details immutable, astro data refreshable
2. Cache Wisely: Kundli doesn't change often, cache for hours
3. Version Kundli Format: Add version field for future schema changes
4. Audit Trail: Log all kundli generations for debugging

AI Prompt Engineering

1. Structured Context: Use YAML/XML tags for clear sections
2. Query Classification: Pre-process query to determine focus area
3. Citation: Instruct AI to cite planetary positions in answers
4. Fallback: Handle cases where chart doesn't support query

User Experience

1. Progressive Loading: Show basic chart while detailed analysis loads
2. Explanation: Explain astrological terms in simple language
3. Remedies: Always provide actionable remedies
4. Consent: Privacy for sensitive birth data

Common Pitfalls

1. Wrong Timezone: Results in completely different chart
2. 12-hour AM/PM Confusion: 2:30 PM ≠ 14:30, causes 12-hour error
3. Ignoring Retrograde: Planetary retrograde changes interpretation
4. Static Dasha: Dasha changes over time, refresh periodically
5. Oversimplified Predictions: AI needs detailed context, not just sun sign
6. Missing Gender Context: Venus/Jupiter interpretation differs by gender
7. Ignoring Dosha: Manglik dosha critical for marriage predictions

Framework Adaptations

Django

• MongoDB for document storage
• Celery for async API calls
• Django cache for kundli caching
• REST API for frontend

FastAPI

• Motor (async MongoDB driver)
• Background tasks or Celery
• Redis caching
• WebSocket for real-time predictions

Node.js (Express)

• Mongoose for MongoDB
• Bull for job queue
• Redis caching
• Socket.io for real-time

Spring Boot

• Spring Data MongoDB
• Spring Async or RabbitMQ
• Spring Cache
• WebFlux for reactive

Related Resources

• Vedic Astrology Texts: Brihat Parashara Hora Shastra, Jaimini Sutras
• API Providers: AstrologyAPI.com, Prokerala, GeoVedic
• Libraries: Swiss Ephemeris (planetary calculations)
• Terminology: https://en.wikipedia.org/wiki/Hindu_astrology

Summary

Building an astrology backend requires:

1. Domain Knowledge: Understand houses, planets, dasha, doshas
2. Accurate Data: Timezone and coordinates are critical
3. Structured Transformation: Convert verbose API data to clean kundli
4. Rich AI Context: Provide complete birth chart to LLM
5. Query Intelligence: Map user questions to relevant chart sections
6. Remedies: Always provide actionable guidance

This skill provides the patterns and domain knowledge to build production-grade vedic astrology systems with AI integration. Combine with the ai-integrated-api-backend skill for complete implementation guidance.

IMPORTANT ASTRO DATA POINTS:

• astro_details — Basic birth chart details
• horo_d1_chart_data — Main birth chart (Rashi chart)
• horo_d9_chart_data — Navamsa divisional chart
• planet_chart_data — Detailed planetary positions
• current_vdasha — Current Vimshottari dasha period
• current_vdasha_all — Complete dasha timeline
• manglik — Manglik dosha analysis
• pitra_dosha_report — Pitra dosha analysis
• basic_gem_suggestion — Gemstone recommendations
• rudraksha_suggestion — Rudraksha bead suggestions