Astro Natal Chart

Calculates and interprets the natal chart by date, time and place of birth with the positions of planets, houses and main aspects. Windows OS 10/11 Required.

dynamicsAlex@dynamicsalex

Install

openclaw skills install @dynamicsalex/astro-natal-chart

Astrology — Natal Chart

Engine: Swiss Ephemeris (pyswisseph 2.10.3.2) + Pillow (PIL)

This skill uses pyswisseph 2.10.3.2 for astrological computation and Pillow 12.x for graphical chart rendering.

⚠️ Requirements

Requirement	Details
OS	Windows (x64) — tested on Windows 10/11
Python	3.14.x (bundled `.pyd` compiled for CPython 3.14)
Runtime	Microsoft Visual C++ Redistributable 2015–2022 (x64) — required for the bundled native extension
Pillow	12.x — `pip install pillow` (for graphical wheel chart rendering)

Installation steps:

Install Python 3.14
Install Microsoft Visual C++ Redistributable x64 (winget install Microsoft.VCRedist.2015+.x64)
Install Pillow: pip install pillow

Architecture

All astrological calculations flow through a single source of truth:

text

natal_chart_swe.py --json  →  JSON data  →  draw_wheel.py  →  PNG image
                                  ↕
                          natal_chart_swe.py  →  text output

natal_chart_swe.py is the sole calculation engine. draw_wheel.py only renders — it calls natal_chart_swe.py --json via subprocess and draws the wheel from that data. This guarantees text and graphical output always match.

Text Output (Swiss Ephemeris)

Usage

bash

python scripts/natal_chart_swe.py <date DD.MM.YYYY> <time HH:MM> <city>
python scripts/natal_chart_swe.py 14.12.1991 18:30 Ижевск

JSON Output (for renderers)

bash

python scripts/natal_chart_swe.py <date> <time> <city> --json
python scripts/natal_chart_swe.py 14.12.1991 18:30 Ижевск --json

JSON structure:

json

{
  "date": "14.12.1991", "time": "18:30", "city": "Ижевск",
  "city_full": "Ижевск, Россия",
  "lat": 56.8519, "lon": 53.2114, "tz": "Europe/Samara",
  "tz_offset": 4, "jd": 2448605.104167,
  "planets": {
    "Sun":     {"lon": 262.097, "speed": 1.017, "retro": false},
    "Moon":    {"lon": 354.459, "speed": 12.461, "retro": false},
    ...
  },
  "houses": [116.94, 130.43, ...],
  "asc": 116.94, "mc": 352.89,
  "planet_houses": {"Sun": 6, "Moon": 10, ...},
  "aspects": [
    {"p1": "Mercury", "p2": "Venus", "type": "semisextile", "orb": 0.5},
    ...
  ]
}

Graphical Chart Rendering (Pillow)

The skill includes scripts/draw_wheel.py — a full-featured natal chart wheel renderer that produces a composite PNG image.

Important: draw_wheel.py does NOT perform its own astrological calculations. It calls natal_chart_swe.py --json and renders the returned data. This eliminates data discrepancies between text and graphical output.

Usage

bash

# English (default)
python scripts/draw_wheel.py

# Russian
python scripts/draw_wheel.py --lang ru

# Arbitrary birth data
python scripts/draw_wheel.py 24.04.1983 06:00 Ижевск --lang ru

# Explicit English
python scripts/draw_wheel.py --lang en

Output

File	Language
`natal_full.png`	English chart (5760×2880)
`natal_full_ru.png`	Russian chart (5760×2880)

Image Layout (5760×2880 px)

|                  |                           |                  |
|   NATAL WHEEL    |     ESSENTIAL DATA        |  ZODIAC CIRCLE   |
|   (2160×2160)    |     (1440×2880)           |  (2160×2160)     |
|                  |                           |                  |
|  - Sign sectors  |  - Date, time, place      |  - Sign sectors  |
|  - House cusps   |  - Coordinates, timezone  |  - Planet marks  |
|  - Planet marks  |  - ASC / MC positions     |  - ASC/DSC/MC    |
|  - Aspect lines  |                           |  - Same size as  |
|  - ASC/MC lines  |                           |    natal wheel   |
|                  |                           |                  |
|  --- Legends --- |                           |                  |
|  Planet|Element  |                           |                  |
|  |Aspect       |                           |                  |
+------------------+---------------------------+------------------+

Image Layout (5760×2880 px)

text

+------------------+---------------------------------------------+
|                  |                                             |
|   NATAL WHEEL    |          INTERPRETATION PANEL               |
|   (2160×2160)    |            (3600×2880)                      |
|                  |                                             |
|  - "NATAL CHART" |  - Date, time, place, coordinates, tz       |
|    title + name  |  - ASC / MC positions                       |
|  - Sign sectors  |  - Sun/Moon/ASC sign interpretation         |
|  - House cusps   |  - Dominant element, stelliums, retrogrades |
|  - Planet marks  |  - All 12 houses with cusp positions,       |
|  - Aspect lines  |    house meanings, and planets in each      |
|  - ASC/MC lines  |                                             |
|                  |                                             |
|  --- Legends --- |                                             |
|  Planet|Element  |                                             |
|  |Aspect       |                                             |
|  | ClawHub link |                                             |
+------------------+---------------------------------------------+

text


### Font Handling

Two bundled fonts in `scripts/`:

| Font | Purpose | Glyphs |
|---|---|---|
| `seguisym.ttf` (2.4 MB) | Zodiac symbols | ♈♉♊♋♌♍♎♏♐♑♒♓ (U+2648–U+2653) + latin |
| `segoeuisl.ttf` (854 KB) | All other text | Cyrillic, latin, digits, punctuation |

The `rtext()` function selects fonts **per character**: zodiac symbols → `seguisym.ttf`, everything else → `segoeuisl.ttf`. This ensures correct rendering of mixed content like "♈ Овен AR".

**Why not a single font?** No standard Windows font contains both zodiac symbols AND cyrillic. `seguisym.ttf` has zodiac but no cyrillic. `segoeui.ttf` has cyrillic but no zodiac. Per-character selection is the solution.

### Pillow Dependencies

`draw_wheel.py` uses these Python modules:

| Module | Purpose | Install |
|---|---|---|
| `PIL` (Pillow) | Image creation, drawing (circle, ellipse, line, pieslice, text) | `pip install pillow` |
| `math` | Trigonometric calculations (cos, sin, radians) | Stdlib |
| `json` | Parse natal_chart_swe.py JSON output | Stdlib |
| `subprocess` | Call natal_chart_swe.py --json | Stdlib |
| `os`, `sys` | File path operations | Stdlib |
| `argparse` | CLI argument parsing (`--lang en/ru`) | Stdlib |

Note: `draw_wheel.py` does NOT import `swisseph` directly. It receives all planetary data from `natal_chart_swe.py --json`.

---

## Standard Text Output Format

🌟 NATAL CHART [Swiss Ephemeris vX.XX] 📅 Date: [date] ⏰ Time: [time] 📍 Place: [city] 🌍 Coordinates: [lat], [lon] 🕐 Timezone: [tz] (UTC+/-offset) 📊 JD: [julian_day]

⬆️ ASC — [sign] [degrees]′ 🜨 MC — [sign] [degrees]′

PLANETS: ☀️ Sun — [sign] [degrees]′ [house] [℞] (speed °/day) 🌙 Moon — [sign] [degrees]′ [house] ...

HOUSES: I house — [sign] [degrees]′ ... (all 12 houses)

MAJOR ASPECTS: ☌ Conjunction: [planet]-[planet] (orb: X.X°) ...

INTERPRETATION: [detailed interpretation]

text


## Aspect Orbs

| Aspect | Symbol | Orb |
|--------|--------|-----|
| Conjunction | ☌ | ±8° |
| Opposition | ☍ | ±8° |
| Square | □ | ±7° |
| Trine | △ | ±7° |
| Sextile | ✶ | ±5° |
| Semisextile | ⚺ | ±2° |
| Quincunx | ⚹ | ±2° |
| Semisquare | ∠ | ±2° |

## Zodiac Signs — Keywords

- ♈ Aries: initiative, energy, impulsiveness
- ♉ Taurus: stability, sensuality, stubbornness
- ♊ Gemini: sociability, intellect, curiosity
- ♋ Cancer: emotionality, nurturing, intuition
- ♌ Leo: creativity, leadership, pride
- ♍ Virgo: analytical, practical, perfectionist
- ♎ Libra: harmony, diplomacy, partnership
- ♏ Scorpio: depth, transformation, intensity
- ♐ Sagittarius: optimism, philosophy, freedom
- ♑ Capricorn: ambition, discipline, responsibility
- ♒ Aquarius: originality, independence, innovation
- ♓ Pisces: intuition, compassion, dreaminess

## Planets — Meanings

- **Sun** — ego, essence, vitality, father
- **Moon** — emotions, subconscious, mother, instincts
- **Mercury** — thinking, communication, learning
- **Venus** — love, beauty, values, finances
- **Mars** — energy, action, aggression, sexuality
- **Jupiter** — expansion, luck, wisdom, growth
- **Saturn** — limitations, discipline, karma, structure
- **Uranus** — change, rebellion, innovation, suddenness
- **Neptune** — illusion, spirituality, creativity, dissolution
- **Pluto** — transformation, power, death/rebirth

## Houses — Life Areas

1. **I (ASC)** — personality, appearance, self-presentation
2. **II** — money, values, resources
3. **III** — communication, siblings, learning
4. **IV (IC)** — home, family, roots
5. **V** — creativity, children, romance
6. **VI** — health, work, routine
7. **VII (DSC)** — partnership, marriage
8. **VIII** — transformation, shared resources, intimacy
9. **IX** — philosophy, travel, higher education
10. **X (MC)** — career, reputation, goals
11. **XI** — friends, hopes, groups
12. **XII** — solitude, subconscious, karma

## Interpretation Guidelines

When interpreting, consider:
1. **Sun** — core personality
2. **Moon** — emotional nature
3. **Ascendant** — mask, first impression
4. **MC** — career aspirations
5. **Stelliums** (3+ planets in one sign/house)
6. **Retrograde planets** — energy turned inward
7. **Major aspects** — personality dynamics
8. **Dominant elements** (fire, earth, air, water)

## Disclaimer

This is an entertainment/educational tool, not a scientific method. Do not make medical or financial predictions based on astrological readings.

---

## Scripts Reference

| Script | Purpose | Dependencies |
|---|---|---|
| `scripts/natal_chart_swe.py` | **Sole calculation engine.** Text natal chart with `--json` export | swisseph (bundled .pyd), math, os |
| `scripts/draw_wheel.py` | **Renderer only.** Calls `natal_chart_swe.py --json`, draws 5760×2880 chart PNG | subprocess, json, math, os, argparse, Pillow |
| `scripts/seguisym.ttf` | **Zodiac symbol font.** Bundled for correct ♈♉♊... rendering. ~2.4 MB. | — |
| `scripts/segoeuisl.ttf` | **Cyrillic/latin font.** Bundled for cyrillic, digits, latin text. ~854 KB. | — |
| `scripts/swisseph.cp314-win_amd64.pyd.dat` | Bundled Swiss Ephemeris binary (2 MB) | MSVC++ Redist |

### draw_wheel.py — Quick Reference

```bash
# Generate chart with interpretation (English, default Matvey's data)
python scripts/draw_wheel.py

# Generate for any person (Russian)
python scripts/draw_wheel.py 24.04.1983 06:00 Ижевск --lang ru --name "Алексей"

# Generate for any person (English)
python scripts/draw_wheel.py 25.10.1985 21:35 Можга --lang en

# Options:
#   --name "Person Name"  — name shown above the wheel
#   --lang ru|en          — language of interpretation (default: en)
#   --conclusion FILE     — path to text file with AI-generated conclusion
#   --frame FILE          — path to .png.dat image (QR code). Default: bundled frame_small.png.dat

# Output files:
#   natal_full.png     — English version
#   natal_full_ru.png  — Russian version

# AI Conclusion workflow (for OpenClaw agents):
#   Step 1: python scripts/natal_chart_swe.py <date> <time> <city> --json
#   Step 2: AI analyzes JSON and writes conclusion to a file
#   Step 3: python scripts/draw_wheel.py <date> <time> <city> --lang ru --name "Name" --conclusion <file>

natal_chart_swe.py — Quick Reference

bash

# Text chart
python scripts/natal_chart_swe.py 14.12.1991 18:30 Ижевск

# JSON export (used by draw_wheel.py)
python scripts/natal_chart_swe.py 14.12.1991 18:30 Ижевск --json

Changelog

v4.3.7 (2026-06-24)

QR code now renders by default — --frame now defaults to bundled rame_small.png.dat instead of being optional
Updated .gitignore to exclude runtime-generated .png files
SKILL.md: updated --frame documentation

v4.3.6 (2026-06-11)

Fixed QR code transparency: RGBA frame images now preserve alpha channel when pasted onto the chart (was converting to RGB, causing black background behind transparent QR codes)
SKILL.md version bumped to 4.3.6

v4.3.5 (2026-06-11)

Moved divider line above ClawHub link and QR code: thin separator now appears before the ClawHub URL and QR code in the info panel
Added frame_small.png.dat: bundled QR code image for embedding in chart output
SKILL.md version bumped to 4.3.5

v4.3.4 (2026-06-11)

Moved divider line above ClawHub link and QR code: thin separator now appears before the ClawHub URL and QR code in the info panel
Added frame_small.png.dat: bundled QR code image for embedding in chart output
SKILL.md version bumped to 4.3.4

v4.3.3 (2026-06-11)

Moved divider line above ClawHub link and QR code: thin separator now appears before the ClawHub URL and QR code in the info panel, improving visual separation from the aspects block
Added frame_small.png.dat: bundled QR code image for embedding in chart output
SKILL.md version bumped to 4.3.3

v4.3.2 (2026-06-02)

Moved aspects & configurations to Info panel: detailed aspect list with descriptions (from interp panel) now appears in the middle Info panel, below planet/house tables
Added text labels to aspect legend: wheel legend now shows Unicode symbol + text abbreviation (☌ Conj, □ Sqr, △ Trine, etc.)
Restored AI conclusion block: "ЗАКЛЮЧЕНИЕ" / "CONCLUSION" block at bottom of Interpretation panel (was accidentally removed during refactoring)
SKILL.md version bumped to 4.3.2

v4.3.1 (2026-06-02)

Fixed aspect symbol rendering: aspect symbols (☌, ☍, □, △, ✶, ⚹, ⚺, ∠) were rendering as rectangles because segoeuisl.ttf does not contain them — now all aspect symbols use seguisym.ttf via extended is_z() check
Legend aspect symbols: replaced text abbreviations (cj/sx/sq/tr/qn/op) in the wheel legend with proper Unicode aspect symbols from seguisym
SKILL.md version bumped to 4.3.1

v4.3.0 (2026-06-02)

--conclusion FILE flag: draw_wheel.py accepts a path to a text file with an AI-generated conclusion
- Conclusion appears at the bottom of the Interpretation panel, after the houses section
- Decorative gold separator lines frame the conclusion block
- Title: «CONCLUSION» (EN) / «ЗАКЛЮЧЕНИЕ» (RU)
- Multi-paragraph text is wrapped to panel width (2400px)
- Works with any AI-generated summary — not rendered if flag is omitted
3-phase workflow for OpenClaw agent: (1) natal_chart_swe.py --json → (2) AI generates conclusion → (3) draw_wheel.py ... --conclusion file.txt
SKILL.md version bumped to 4.3.1

v4.2.0 (2026-06-02)

3-column layout: right panel split into Info (1/3 = 1200px) and Interpretation (2/3 = 2400px)
- Info panel (1/3): essential data (date, time, place, coordinates, timezone), ASC/MC, planet table with houses, house cusp table, compact aspect list
- Interpretation panel (2/3): Sun/Moon/ASC interpretation, dominant element, stelliums, retrograde planets, aspects with descriptions, houses with full planet meanings
Text wrapping fixed: wrap_text() now uses per-panel width (1200px for Info, 2400px for Interp) — long descriptions properly wrap instead of being clipped
Renamed 'ТОЛКОВАНИЕ' → 'ИНТЕРПРЕТАЦИЯ' in Russian mode (was already 'INTERPRETATION' in English)
Vertical dividers between all three columns
SKILL.md version bumped to 4.2.0

v4.0.0 (2026-06-01)

Bilingual interpretation: all interpretation text available in both Russian and English
- Default language: English (--lang en)
- Russian: --lang ru
- Separate interpretation data module: scripts/interp_data.py
- Includes HOUSE_TEXTS_RU/EN, PLANET_MEANING_RU/EN, SIGN_KEYWORDS_RU/EN, ASPECT_MEANING_RU/EN
Extended house descriptions: each house now has a detailed 3-sentence description covering multiple life areas
Aspect interpretation block: all aspects listed with orb values and brief interpretation
Filename includes person name: output format is now {Name}_full_natal_{lang}.png (e.g. Анна_full_natal_ru.png, Anna_full_natal_en.png)
Fixed planet meaning context bug: planet meanings now correctly reference the planet itself (not the Sun's sign)
Separated interpretation data: interp_data.py contains all text constants, draw_wheel.py contains rendering logic
SKILL.md updated with new CLI flags and output file naming

v3.8.0 (2026-06-01)

Fixed element coloring bug: Pillow pieslice() uses a different coordinate system than cos/sin — sectors were drawn at mirrored positions, causing wrong element colors (Fire showed as Earth's green, Air as Water's blue, etc.). Replaced pieslice() with draw.polygon() using explicit aof(d) = radians(90-d) coordinate math, which is consistent with planet/symbol positioning.
Sector boundaries aligned to zodiac signs: sectors now start from the beginning of each sign (e.g. 270° for Capricorn), not from the ASC degree. This ensures clean 30° sign sectors regardless of ASC position.
Bundled fonts: seguisym.ttf (2.4 MB, zodiac symbols) and segoeuisl.ttf (854 KB, cyrillic/latin) are both included in scripts/ and published with the pack.
SKILL.md changelog updated.

v3.7.0 (2026-06-01)

Two equal-size wheels: natal chart with houses (left) and zodiac planet circle (right) — both 2160×2160px
Panoramic layout: 5760×2880 total (2:1), data panel (1440px) between the two wheels
Dual-font rendering: seguisym.ttf for zodiac symbols (large, 44pt), segoeuisl.ttf for cyrillic/latin/digits — bundled in scripts/
Per-character font selection: rtext() automatically picks the right font per character — no more tofu
Zodiac planet circle: same planet orbit radius (RP=648) and planet size (r=18) as main wheel
Essential data panel: date, time, place, coordinates, timezone, ASC/MC between the wheels
Roman numerals for house cusps (I–XII)
ASC/DSC/MC lines on zodiac circle
Planet, element, aspect legends below the left wheel
Bundled fonts: seguisym.ttf (zodiac) + segoeuisl.ttf (cyrillic/latin) in scripts/

v3.4.0 (2026-06-01)

Fixed zodiac symbol rendering: all font loading now uses a single TrueType font (Segoe UI) with guaranteed Unicode zodiac + Cyrillic support. Symbols like ♈♉♊ render correctly everywhere — wheel, legend, and interpretation text.
Unified font system: replaced separate get_symbol_font()/get_font() with single cached font() function that scans fallback chain and verifies glyph coverage
Element legend added: color-coded legend showing Fire/Earth/Air/Water with colored rectangles
Legends fully below wheel: planet, element, and aspect legends placed at cy + R_OUTER + 50, guaranteed zero overlap with the circular chart

v3.3.0 (2026-06-01)

4K resolution: canvas is now 3840×2160 (was 2840×1800), all elements scaled proportionally
Legend moved below wheel: planet legend, element legend, and aspect legend are now placed entirely below the circular chart area — zero overlap with the wheel
Zodiac symbols in all text: interpretation text uses ♈♉♊... instead of TA/SG/AR/etc. abbreviations
Element color legend: added visual legend showing Fire/Earth/Air/Water color coding used in sign sectors
Layout: wheel area 2160×2160, text area 1680×2160, legends below wheel in left panel

v3.2.0 (2026-06-01)

Zodiac symbols instead of text abbreviations: wheel now shows ♈♉♊♋♌♍♎♏♐♑♒♓ instead of AR/TA/GE/etc.
2x resolution: canvas is now 2840×1800 (was 1420×900), all fonts and elements scaled proportionally
Planet legend moved to bottom-left: no longer overlaps the chart wheel; placed below info box
Full interpretation fits: larger text panel (1040px) with bigger fonts ensures all 12 houses + aspects render without truncation
Added get_symbol_font() helper: uses Segoe UI Symbol for reliable zodiac glyph rendering
Version bumped: 3.1.0 → 3.2.0

v3.1.0 (2026-06-01)

Unified calculation architecture: draw_wheel.py removed all duplicate astrological calculation code
- Now calls natal_chart_swe.py --json via subprocess for all planetary/house/aspect data
- Guarantees text and graphical output always match (single source of truth)
Added --json flag to natal_chart_swe.py: exports all calculated data (planets, houses, aspects, metadata) as parseable JSON
draw_wheel.py now accepts CLI arguments: draw_wheel.py [date] [time] [city] [--lang en/ru]
- Default: Matvey's chart (14.12.1991 18:30 Ижевск)
- Custom: any date/time/city combination
Generated interpretation: stelliums, key configurations, house-by-house now auto-detected from JSON data rather than hardcoded
Updated SKILL.md: architecture diagram, JSON format docs, scripts reference
Version bumped: 3.0.0 → 3.1.0

v3.0.0 (2026-06-01)

Added graphical chart renderer (scripts/draw_wheel.py) using Pillow (PIL)
- Composite 3840×2160 PNG (4K): circular wheel (left) + house interpretation (right)
- 12 sign sectors colored by element (fire/earth/air/water)
- Planet markers with retrograde(℞) indication
- House cusp lines with numbered divisions
- ASC/MC highlighted lines
- Aspect lines color-coded by type (conj/sqr/trine/sext/opp/quinc)
- Info box with ASC/MC positions and aspect legend
- Planet legend panel
- Full house-by-house textual interpretation on the right panel
Localization support (--lang en / --lang ru)
- English (default) and Russian output
- All labels, headers, and interpretation text localized
Added Pillow dependency (installed via pip install pillow)
Pillow drawing API documented in SKILL.md
Scripts reference table added to SKILL.md
Version bumped: 2.1.0 → 3.0.0
Description updated to mention graphical visualization

v2.1.0 (2026-05-28)

Fixed .pyd.dat loading on Windows — importlib.util.spec_from_file_location does not recognize non-standard extensions; added auto-copy to temporary .pyd before loading
Added Microsoft Visual C++ Redistributable as explicit requirement — bundled .pyd compiled with MSVC 14.44 requires vcruntime140.dll and friends
Requires Python 3.14.x — binary extension compiled for CPython 3.14 ABI
Added Requirements section to SKILL.md with installation instructions
Updated metadata: version bumped to 2.1.0, description mentions Windows compatibility
Tested on Windows 10 (10.0.19045, x64) with Python 3.14.5 and VC++ Redist 14.51.36231.0

v2.0.0 (2026-05-28)

Switched to Swiss Ephemeris (pyswisseph 2.10.3.2) as the primary calculation engine — replaces simplified analytical formulas
Replaced hardcoded positions with swe.calc_ut() using NASA JPL DE431 ephemerides
House calculation now uses swe.houses_ex() (exact iterative Placidus) instead of analytical approximations
Added retrograde detection via FLG_SPEED flag (velocity sign)
Bundled swisseph.cp314-win_amd64.pyd (2 MB) in scripts/ — no system-wide pip installation required
Version detection: swe.__version__ returns int 20230604 — formatted as vYY.MM.BLD string
Expanded city database to 50+ cities with coordinates and timezone data
Added proper Julian Day conversion through swe.julday()
Removed legacy scripts: natal_chart.py, placidus_iterative.py, placidus_meeus.py and all debug/fix scripts (11 files)
SKILL.md rewritten in English with full documentation

v1.x (earlier)

Initial release using simplified analytical formulas
Separate iterative and Meeus-based Placidus implementations
Planet positions calculated with approximate algorithms (0.5–15° error range)