Before any of the technique makes sense, it is worth knowing whose technique it is — and being told plainly which parts of it we can put in front of you and which parts we cannot.
If you have only met astrology as a newspaper column or an app that asks for your birthday, it is reasonable to assume the whole field is one thing with regional accents. It is not. There are several astrologies. They disagree about things you can measure and descend from different places.
This app works inside exactly one of them, and the honest thing to do is name it before you read another word.
The word
The Sanskrit name for the subject is Jyotish — commonly rendered "the science of light". The gloss this lineage teaches is narrower and more useful: the light of Ishwara, the light of the divine. Something that illuminates.
A lamp shows you the room. It does not move the furniture. That is not a flourish — it is the first rule in this system, it is where the ethics come from, and everything below is built on top of it.
The branch
Within Jyotish, this app works in the Parashari branch — the body of technique this lineage attributes to the sage Parashara, and counts as its root.
What "Parashari" means in practice is not a mood but a set of structural commitments you can point at. One example, the one that changes a reading most: Parashari technique does not give you a single starting point for a chart. It gives you three, on the grounds that a human being incarnates on three levels at once — idea, emotion and body — and so needs three ascendants rather than one. The Sun's seat is the level of the idea. The Moon's seat is the level of emotion, where an idea meets other people and is accepted or refused. The rising sign is the physical level: the body, the visible life, the only one of the three that is actually a fact about the Earth rather than about the sky.
Astrology, in this lineage, lives in the interaction of those three. Not in any one of them read alone.
The chain, and the part we do not have
The rules in this engine were not assembled from books in a library. They came down a chain that the vault behind this app records on every single rule, in these words: sages, then books, then a teacher, then the person who built this. It is a taught lineage: somebody sat in front of somebody else for years.
That is a real provenance and a limited one, so here is the limit before anyone finds it themselves.
We do not hold the verses. The classical compendium usually named as the Parashari source — the Brihat Parashara Hora Shastra — is cited in this project as lineage, not as text. There is no shelf of shlokas behind these pages that we can open for you, and there will not be one until we can do it properly: the Sanskrit located, the edition named, and our own English rendering rather than a lifted one. The received compendium is a compilation whose manuscripts vary and whose verse numbering differs between editions, so a citation that does not name its edition is not a citation at all — it is decoration. We would rather have no shloka on the page than an unlookupable one.
What was done to it here
What this project did to that inheritance is the only part of it that is ours: the teaching was formalised into explicit rules, each written down with what it claims, the condition under which it applies, and where it came from — and then tested against real lives, real careers, real marriages, real reversals.
A rule that cannot predict something falsifiable does not ship — which is why coverage grows sign by sign, and why the app will sometimes say it does not know rather than produce a plausible sentence.
It also means some of what we hold is marked as shaky, in writing, by us. At least one rule in the vault is flagged as a reconstruction built from conversation rather than from a lecture, and is not to be cited as settled. The divisional-chart standard is marked unvalidated and nothing in the engine reads from it. Those flags are not embarrassments to be tidied away before the guests arrive. They are the difference between a lineage being carried and a lineage being performed.
It is not a religion
This needs saying because the vocabulary makes people assume otherwise.
Astrology, in this lineage's own statement of itself, is not a religious subject. It applies the same way to a Hindu, a Muslim, a Christian, a Parsi and an atheist. The mantras, the deities and the ritual that have attached themselves to it were inserted by particular cultures at particular times; they are not the subject. You are meant to treat it rationally, as a subject.
Which is also the answer to the thing that keeps a lot of intelligent people away from all of this: the industry of fear and cures. It is not in the root. "Do not sign contracts this week" is not in Parashara. Neither is the gemstone that fixes it.
What to read next
These five are meant to be walked in order. The next is the largest difference between what you already know and what this app does: here, the timekeeper is not the Sun.