vedic-chart

A tool for turning a Vedic astrology chart image into structured JSON data and text diagrams. Vedic astrology, also called Jyotish, uses signs, houses, planets, and chart divisions to represent a birth chart.

In plain words
What is it for?
Use it to extract planets, signs, degrees, retrograde markers, and chart divisions from supported horoscope images, then produce North-Indian and South-Indian text layouts.
Why use it?
It avoids manually reading chart boxes and calculates house placement from the chart’s sign and longitude data when that information is available.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/mayank-io/mstack/vedic-chart
Any agent
npx skills add mayank-io/mstack --skill vedic-chart
Clone the repo
git clone --depth 1 https://github.com/mayank-io/mstack

Made for: Claude Code, Codex.

Per session 131 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,126 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00131 $0.01126
Opus 5 $0.00066 $0.00563
Sonnet 5 $0.00026 $0.00225
Haiku 4.5 $0.00013 $0.00113

Measured 2d ago against content hash 1cfbc811a42c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vedic-chart scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/fetch/skills/vedic-chart/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Vedic Chart Extractor

Convert a Vedic astrology chart image (a Jagannatha Hora / Parashara's Light style printout) into a structured JSON chart and ASCII North-Indian + South-Indian diagrams. A bundled script does the work end to end.

What the source images look like

The script targets the standard software printout: a North-Indian chart (left), a South-Indian chart (right), a birth-data header, and — crucially — a longitude table across the bottom listing each body as sign deg' min with retrograde and Jaimini karaka markers (e.g. Su: 4 Sc 08-DK). That bottom table is the ground truth; houses are computed from it deterministically, so the chart diagrams are never parsed glyph-by-glyph.

A chart-only image with no bottom table still works, but bodies the table would have carried fall back to sign-only placement (no degrees).

How it works

image --(claude vision reads the longitude table)--> chart JSON --(pure renderers)--> ASCII

House placement is house = (sign_index - lagna_index) mod 12 + 1. North-Indian is house-fixed (Lagna always top-center, signs rotate); South-Indian is sign-fixed (Pisces/Aries/… in fixed cells, houses rotate). Both render from the same JSON.

Usage

Extraction calls the claude CLI (must be on PATH, recent enough to accept --effort and --allowedTools). Run the bundled script:

# extract + render both ASCII styles; JSON then charts to stdout
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/chart_to_ascii.py path/to/chart.png

# write sidecars (<stem>.json + <stem>.txt) next to the image(s)
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/chart_to_ascii.py images/*.png -o images/

# render only, no vision call, from a previously extracted JSON
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/chart_to_ascii.py chart.json --emit ascii

Options: --emit {json,ascii,both} (default both), --style {north,south,both} (default both), -o/--outdir DIR, --model MODEL (default claude-opus-4-8), --overwrite (re-extract even if a sibling .json exists; otherwise a cached sidecar is reused). Data goes to stdout, progress/errors to stderr, non-zero exit on any failure.

Read the full file on GitHub · 89 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 89 lines · 131 tokens per session scan A 1cfbc811a42c

Subscribe to this mod's changes

vedic-chart is a skill published in the GitHub repository mayank-io/mstack (5 stars, last pushed 7d ago), licensed MIT. It adds 131 tokens to every session and 1,126 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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