Primary Directions Feature List

Purpose

This document lists the current feature surface of Moira's primary-directions subsystem in practical terms.

It is not a roadmap and not a research ledger.

It answers one question:

• what primary directions can Moira actually do now?

Core Engine

• speculum construction for the admitted primary-direction families
• direct, traditional role-exchanged converse, opt-in neo-converse, and the narrow Topocentric signed-primary-motion classifier
• explicit branch selection through PrimaryDirectionsPreset and primary_directions_policy_preset(...)
• policy-aware runtime surfaces for method, space, relation, latitude, source, perfection, and targets
• symbolic time conversion through explicit static or dynamic key doctrine
• integrated chronological timelines with terms/bounds, distributors, and participators

Geometry Families

Runtime-admitted methods:

• Placidus mundane
• Ptolemy / semi-arc
• Placidian classic / semi-arc
• Meridian
• Morinus
• Regiomontanus
• Campanus
• Topocentric

Important qualifier:

• Morinus is admitted, but its conjunction-style branch remains shared with the Regiomontanus under-the-pole law while its aspect branch is the clearest distinct surface

Direction Spaces

• In Mundo
• In Zodiaco

Explicit zodiacal latitude branches:

• zodiacal_suppressed
• zodiacal_promissor_retained
• zodiacal_significator_conditioned

Motion Doctrine

• Direct
• Traditional converse
• Neo-converse, as an explicit opt-in counter-diurnal circle-complement law
• Signed primary motion, only through topocentric_zodiacal_aspect_signed_primary_motion with explicit target filters

Time Keys

• Ptolemy
• Naibod
• Cardan
• Solar, using an explicit natal solar rate
• Solar RA dynamic, using ephemeris inversion in right ascension
• Solar longitude dynamic, using ephemeris inversion in ecliptic longitude

Dynamic keys require a natal Julian date and usable planetary reader. Inversion failure raises; it is never relabeled while silently using a static rate.

Perfection and Relation Doctrine

Perfection kinds:

• mundane_position_perfection
• zodiacal_longitude_perfection
• zodiacal_projected_perfection

Relation classes now explicit in the subsystem:

• conjunction
• opposition
• zodiacal_aspect
• parallel
• contra_parallel
• rapt_parallel
• antiscion
• contra_antiscion
• term_bound
• mundane_aspect
• mundane_parallel
• mundane_contra_parallel
• midpoint

Promissors and Significators

Base target families:

• planets
• nodes
• angles
• house cusps

Derived or narrow admitted families:

• zodiacal aspect-point promissors
• Ptolemaic zodiacal parallels / contra-parallels
• Placidian direct and converse rapt parallels
• catalog-backed fixed-star conjunctions to angles and planets
• Ptolemaic zodiacal antiscia / contra-antiscia
• Egyptian, Ptolemaic, and Chaldean term/bound boundaries for timeline chronology
• method-scoped Placidian and Ptolemaic mundane aspect points
• Placidian mundane parallels / contra-parallels
• shortest-arc circular midpoint promissors

Fixed Stars

Current admitted fixed-star branch:

• sovereign catalog-backed star identity
• explicit star projection through the active speculum
• conjunction to angles
• conjunction to planets

Deferred:

• opposition
• wider star aspects
• broader star doctrine

Reflected Families

Current admitted reflected branch:

• Ptolemaic zodiacal antiscia / contra-antiscia

Deferred:

• non-Ptolemaic reflected doctrine
• broader reflected-family widening

Validation Surface

The subsystem now includes:

• unit invariants
• targeted numerical proofs
• branch-specific fixture-backed validation on the narrow recoverable families
• curated public API checks

Validated narrow families include:

• Ptolemaic parallels
• Placidian rapt parallels
• fixed stars
• antiscia / contra-antiscia
• term/bound distributor chronology
• Placidian and Ptolemaic mundane aspects
• Placidian mundane parallels / contra-parallels
• shortest-arc midpoint targets
• neo-converse and dynamic solar-key invariants

Explicit Omissions

Not currently admitted:

• field_plane
• fixed-star opposition
• wider non-Placidian parallel families
• wider non-Ptolemaic reflected doctrine
• wider mundane-aspect laws outside the admitted Placidian and Ptolemaic branches
• wider midpoint doctrine beyond the admitted shortest-arc target construction

Present Summary

Moira's primary-directions subsystem now provides:

• a broad and mathematically explicit core
• multiple geometry families
• explicit doctrine surfaces
• narrow validated target-family expansions

The subsystem is baseline-complete on the currently recoverable doctrinal surface.

The remaining work is mostly:

• carefully governed frontier research
• or explicit constitutional revision if the admitted surface changes