natal-astrology.md 8.2 KB

Natal Astrology — Agent Interpretation Guide

For agents using the astro MCP to perform natal chart interpretation. Resource URI: astro://guides/natal-astrology

Quick Reference: Tool Call Strategy

natal chart basic       → calculate_natal_chart(birth_data)
natal + overview        → calculate_natal_chart(birth_data, include_overview=true)
natal + patterns        → calculate_natal_chart(birth_data, include_patterns=true)
natal + karmic          → calculate_natal_chart(birth_data, include_karmic=true)
natal reading (full)    → calculate_natal_chart(birth_data, include_overview=true, include_patterns=true)
karmic natal reading    → calculate_natal_chart(birth_data, include_overview=true, include_patterns=true, include_karmic=true)
transit check           → get_transit_preview(birth_data, start, end)
current transits        → get_transit_preview(birth_data, today, today+30d)

Framework

A natal chart is a symbolic map of personality, potential, and life themes. The art of interpretation is synthesis — weaving individual data points (planets, signs, houses, aspects) into a coherent narrative about the person.

Core Principle:

  • Planets = what is happening (psychological functions)
  • Signs = how the energy behaves (style, flavor)
  • Houses = where in life it plays out (life areas)
  • Aspects = how the parts interact (support, tension, fusion)

Standard Natal Reading Workflow

Step 1: Chart Overview

Call: calculate_natal_chart with include_overview=true

Process the overview section:

  1. Element balance — Which elements dominate? Which are missing? Missing element = compensatory life area.
  2. Modality balance — Cardinal (initiating), Fixed (persistent), Mutable (adaptable). Dominant modality = core approach to life.
  3. Hemisphere emphasis — Upper (7-12, outer/public), Lower (1-6, private), East (10-3, self-driven), West (4-9, relational).
  4. Stelliums — 3+ planets in a sign/house = intense focus on that theme.
  5. Empty houses — Life areas that operate more unconsciously, less self-directed.
  6. Chart ruler — The planet ruling the Ascendant sign is the most important planet. Its sign, house, and aspects show where life energy is directed.

Step 2: The Big Three

Data from: Step 1 planets list (Sun, Moon, Ascendant angles)

  1. Sun (sign + house): Core identity and purpose
  2. Moon (sign + house): Emotional needs and instincts
  3. Ascendant (sign from angles): Persona and approach to life
  4. Chart ruler: Ruler of the Ascendant — its sign, house, and aspects (from overview)
  5. Sun-Moon phase (from lunar_phase): New moon (beginning), waxing (building), full (culmination), waning (releasing)

Step 3: Angles and Angle Rulers

Data from: Step 1 angles + overview house_rulers

  • Signs on the 1st, 4th, 7th, 10th house cusps
  • Rulers of these angles and their condition
  • Planets conjunct any angle (highly emphasized)

Step 4: Personal Planets

Data from: Step 1 planets list + aspects (filter for tight orbs, ≤3°)

  • Mercury: Thinking and communication style
  • Venus: Love style, values, aesthetics
  • Mars: Drive, assertiveness, conflict style
  • For each: sign + house + key aspects

Step 5: Social and Outer Planets

  • Jupiter: Growth, opportunity, faith
  • Saturn: Challenges, lessons, mastery
  • Uranus/Neptune/Pluto: Generational themes; personal when tightly aspecting angles or personal planets

Step 6: Aspect Patterns

Call: calculate_natal_chart with include_patterns=true

Use the aspect_patterns output:

  • T-squares: Stress + potential; apex planet is focal point
  • Grand Trines: Natural talent and ease; can indicate complacency
  • Grand Cross: Intense tension requiring balance and flexibility
  • Yods: Fated, sensitive points; apex planet is destiny focal point

Also check chart_shape:

  • Bundle: Intense focus, specialized life approach
  • Bowl: Self-contained, collecting experiences in one direction
  • Bucket: Handle planet directs all the energy
  • Splash: Diverse interests, scattered or universal
  • Locomotive: Driving force, the gap is where they push forward
  • Seesaw: Two opposing pulls that need balance
  • Splay: Multiple talents, needs integration

Step 7: Synthesis

Identify 3–5 recurring themes across the chart:

  1. Repeated elements: Sun + Moon + Ascendant in fire = fire-dominant personality
  2. Contradictions: Sun in Aries but Moon in Libra = inner tension between assertion and harmony
  3. Compensations: Missing fire element but Mars in 1st house = fire through action
  4. Dominant aspects: Multiple squares to Saturn = a "Saturnian" life with heavy lessons
  5. Unaspected planets: Function operates independently, sometimes unconsciously

Step 8: Current Transits (Optional)

Call: get_transit_preview with a date range around today

Shows which natal planets are being activated by transits right now. Focus on:

  • Transits to Sun, Moon, Ascendant (personal activation)
  • Saturn transits (life structure changes)
  • Jupiter transits (growth opportunities)
  • Pluto transits (deep transformation)

Output Structure for a Natal Reading

  1. Overview: Core personality in 2–3 sentences (from element/modality balance, chart shape)
  2. The Big Three: Sun, Moon, Ascendant — identity, emotions, persona
  3. Chart Ruler: Where life energy is directed
  4. Key Planet Placements: 3–5 most significant planet-in-sign-in-house combinations
  5. Major Aspects: 3–5 tightest/most significant aspects with interpretation
  6. Aspect Patterns: Any T-squares, grand trines, grand crosses
  7. Chart Shape: Overall life approach pattern
  8. Life Themes: Recurring patterns across the chart
  9. Strengths and Gifts: Natural talents and supportive aspects
  10. Growth Edges: Challenging aspects and what they're teaching
  11. Current Transits (optional): What's activating the chart right now

Interpretation Templates

Planet in Sign in House

[Planet] in [Sign] in [House] → [Planet function] expressed in the style of [Sign keywords] through the life area of [House].

Example: "Mars in Capricorn in the 6th house → Drive and initiative (Mars) expressed with discipline and ambition (Capricorn) through daily work and health routines (6th)."

Aspect

[Planet A] in [Sign X] [aspect] [Planet B] in [Sign Y] → The [Planet A function] and [Planet B function] are [blended/in tension/in harmony], creating [dynamic] between [life area A] and [life area B].

Example: "Venus in Taurus trine Saturn in Virgo → Love and affection (Venus) flow naturally with discipline and commitment (Saturn), creating a stable, enduring approach to relationships and values."

Chart Ruler

The chart ruler is [Planet] in [Sign] in [House] → Life energy is strongly directed toward [house themes], expressed through [sign style].

Example: "The chart ruler is Mercury in Sagittarius in the 9th house → Life energy is directed toward higher learning, philosophy, and travel, expressed through an optimistic, exploratory communication style."


Common Pitfalls

  1. Sun sign only: The Sun is important, but it's only one piece. Always read the full chart.
  2. Overemphasizing hard aspects: Squares and oppositions are growth opportunities, not curses.
  3. Ignoring the chart ruler: The ruler of the Ascendant is often the most important planet.
  4. Reading planets in isolation: Always consider sign + house + aspects together.
  5. Deterministic language: Avoid "you will" — use "you tend to," "you may find," "there's a theme of."
  6. Missing the forest for the trees: Step back and identify the 3–5 big themes before diving into details.

Interpretation Tone

  • Empowering, not deterministic: The chart shows potential and tendencies, not fixed fate
  • Strengths-first: Lead with gifts before discussing challenges
  • Actionable: For each challenge, suggest what the person can do with it
  • Plain language: Avoid jargon when possible; translate technical terms
  • Holistic: Weave individual placements into a coherent story, not a list of bullet points