astro-mcp/agent-guides/relationship-astrology.md

Relationship Astrology — Agent Interpretation Guide

For agents using the astro MCP to perform relationship chart interpretation.

Overview

Relationship astrology uses four main techniques to analyze the dynamics between two people:

Technique	What It Shows
Synastry	Interaction patterns — how Person A's planets trigger Person B's planets
Composite Chart	The relationship as its own entity — structure, identity, public face
Davison Chart	The relationship's "birth" — inner experience, emotional tone, long-term evolution
Coalescent Chart	Harmonic responsiveness to transits (rarely used)

For serious analysis, use all three main techniques plus natal charts. They are complementary layers, not competing methods.

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Reading Workflow

Step 1: Natal Charts

Understand each person individually first. What are their core needs, attachment styles, relationship patterns? This provides context for everything that follows.

Step 2: Synastry

Analyze the interaction patterns between the two charts:

• Tightest interchart aspects (tightest orbs = most significant)
• Venus-Mars contacts (chemistry)
• Moon contacts (emotional bonding)
• Saturn contacts (commitment, karma, heaviness)
• Node contacts (fated connections)
• House overlays (which life areas are activated)

Step 3: Composite Chart

Analyze the relationship as its own entity:

• Composite Sun (identity and purpose)
• Composite Moon (emotional tone)
• Angular planets (loudest voices)
• Key aspect patterns (especially Saturn, Pluto, Neptune)
• House emphasis (life area of focus)

Step 4: Davison Chart

Analyze the relationship's inner experience:

• Same approach as composite but focused on emotional/internal tone
• More accurate for timing techniques (progressions, solar arcs)
• Use for long-term evolution tracking

Step 5: Synthesis

Find repeated themes across synastry + composite + Davison. These recurring patterns are the core narrative of the relationship.

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Synastry Interpretation

Key Principle

Each person plays the role of their planet in an interchart aspect. If A's Saturn conjuncts B's Sun, A takes on the Saturn role when B expresses Sun qualities. Think of it as a dance where each person activates different roles depending on context.

Interchart Aspects: Quick Reference

Venus-Mars (Chemistry)

Aspect	Meaning
Conjunction	Intense, obvious physical and romantic attraction
Trine/Sextile	Desire and affection flow easily; compatible sexual needs
Opposition	Strong magnetism with push-pull dynamics
Square	Highly stimulating but prone to friction and fights

Moon-Venus (Emotional Warmth)

• Creates tenderness, caring, feeling emotionally "fed" by partner
• One of the best aspects for domestic comfort and feeling cherished
• Conjunction, trine, sextile = easy flow; hard aspects = needs clash

Sun-Moon (Core Compatibility)

• Deep understanding at ego and emotional levels
• Conjunction/trine/sextile: natural "getting" of each other
• Opposition: complementary but different needs
• Square: intense attraction with emotional friction

Saturn Aspects (Commitment and Karma)

• Conjunctions feel fated, dutious, sometimes heavy
• Trines/sextiles provide stability and reliability
• Squares/oppositions bring tests, delays, pressure
• Not inherently bad — many long marriages have strong Saturn contacts

Node Contacts (Fated Connections)

• Planets on North Node: destined connection, growth catalyst
• Planets on South Node: "known you forever" past-life feel
• Saturn on North Node: karmic teacher relationship
• Saturn square Nodes: karmic block, timing challenges

House Overlays

When Planet A falls in Planet B's house:

• 1st house: Strongly visible, shapes self-image
• 4th house: Emotional significance, feeling "at home"
• 7th house: Partnership significance, embodies relating energy
• 8th house: Intense psychological/sexual bond
• 10th house: Public significance, affects career
• 12th house: Hidden or spiritual connection, can be confusing

Orb Guidelines

• Personal planets (Sun through Saturn): 5° max
• Outer planets: 3° max
• Tighter orbs = stronger effect
• Using significance scoring: conjunction/opposition > square > trine > sextile

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Composite Chart Interpretation

Key Principle

The composite chart describes the relationship entity, not either person. Composite Moon in Scorpio doesn't mean either person is emotionally intense — it means the relationship itself has that quality.

Reading Order

1. Chart shape: House clusters (upper/lower, east/west hemispheres)
2. Composite Ascendant: How the relationship presents itself
3. Composite Sun: Relationship identity and purpose
4. Composite Moon: Emotional tone
5. Angular planets: Loudest voices
6. Most-aspected planet: Recurring theme
7. Unaspected planets: Blind spots
8. Chart ruler: How the relationship navigates challenges

Composite Planet Meanings

Planet	Meaning in Composite
Sun	Core identity and purpose of the relationship
Moon	Emotional tone, comfort, daily rhythms
Mercury	Communication style as a couple
Venus	Love style, affection, shared values
Mars	Drive, passion, conflict style
Jupiter	Growth, optimism, shared beliefs
Saturn	Structure, commitment, tests
Uranus	Unpredictability, freedom, innovation
Neptune	Idealism, spiritual connection, illusion
Pluto	Power dynamics, transformation, depth

Composite Aspects

• Orbs: 3° max (tighter than natal). Sub-1° = defining feature.
• Saturn aspects: Structural foundation. No Saturn = free but unstable. Strong Saturn = enduring but demanding.
• Pluto aspects: Power struggles and transformation potential.
• Neptune aspects: Idealization risk. Watch for disillusionment when glamour fades.
• Sun-Saturn conjunction: Core defining feature — serious but potentially very long-lasting.

Common Mistakes

1. Reading composite as a natal chart for one person
2. Treating difficult aspects as relationship doom
3. Reading composite in isolation (always use with synastry + natal)

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Davison Chart Interpretation

Technical Note

The Davison chart is a real chart at a real moment in time (midpoint of two births), unlike the composite which is purely symbolic. This means it can be progressed and directed like a natal chart.

Composite vs. Davison

	Composite	Davison
Nature	Symbolic blueprint	Real moment in space/time
Shows	Structure, public face	Inner tone, emotional experience
Best for	How relationship functions	How it feels and evolves
Timing	Transits	Transits + progressions + solar arcs

Practical Staging

• Synastry → when people first meet
• Composite → once relationship forms
• Davison → once formally committed

When They Differ

Look for repeated themes across both. They are "two versions of the same story." Same planets emphasized, similar house themes = core relationship narrative confirmed.

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Relationship Type Indicators

Romantic / Sexual

• Venus-Mars aspects (synastry + composite)
• 5th and 8th house emphasis
• Moon contacts for emotional bonding
• Saturn contacts for commitment
• Pluto contacts for intensity

Business / Professional

• Mercury contacts for communication
• 6th and 10th house emphasis
• Saturn contacts for structure
• Jupiter contacts for growth
• Uranus contacts for innovation

Family Dynamics

• Moon contacts for emotional patterns
• 4th house emphasis
• Saturn contacts for duty/parental roles
• Node contacts for karmic family patterns

Friendships

• Mercury contacts for intellectual connection
• 11th house emphasis
• Jupiter contacts for shared optimism
• Uranus contacts for unconventional bonds

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Timing Relationship Events

Composite/Davison Transits

• Saturn transits to composite angles: Tests and restructuring
• Jupiter transits to composite angles: Expansion and growth
• Uranus transits: Sudden changes, disruption
• Pluto transits: Deep transformation
• Eclipses hitting composite angles: Fateful turning points

Transit Preview

Use the astro MCP's transit preview capability on the composite and Davison charts to identify windows of activation.

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Karmic Relationship Indicators

(See karmic-agent-GUIDE.md for full detail)

Key Indicators Across All Three Layers

• Saturn-Node contacts between charts (karmic contracts)
• Pluto-South Node contacts (intense past-life patterns)
• Composite/Davison chart emphasizing 8th house (shared transformation)
• South Node contacts suggesting familiarity from past lives
• Saturn-heavy composites suggesting serious, destiny-laden relationships

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Synthesis: Building the Narrative

When synthesizing a relationship reading across all layers:

1. Identify the core narrative — What story do all three layers tell together?
2. Note contradictions — Where do the layers diverge? These are areas of complexity.
3. Assess karmic weight — How many karmic indicators are present? (Saturn, Pluto, Nodes)
4. Determine relationship type — Romantic, karmic, business, casual, fated?
5. Identify growth edges — What are the challenging aspects teaching?
6. Check timing — What transits are activating the relationship now or soon?

Output Structure for Agents

A good relationship analysis output should include:

• Overview: Core narrative in 2-3 sentences
• Synastry highlights: Top 5-7 interchart aspects with interpretation
• Composite reading: Relationship identity, strengths, challenges
• Davison reading (if calculated): Inner emotional experience
• Karmic indicators: Any significant past-life or soul-contract themes
• Current transit influences: What's activating the relationship right now
• Guidance: What each person can do to support the relationship's growth