Compatibility Notes - Moira 6.10.0

Upgrade boundary

Moira 6.10.0 follows 6.9.9. Python 3.10 through 3.14 remain supported. The required native extension and optional server extra retain their existing ownership. No dependency on an external astrology engine is introduced.

Named IANA zones require an installed timezone database, provided by the OS or tzdata. Windows installations commonly need the latter or an explicit PYTHONTZPATH. Missing data fails explicitly; fixed UTC offsets remain usable without an IANA database. See the daily Panchanga standard for that contract.

Observable corrections

• Polynomial ayanamsas now use corrected IAU 2006 general precession. Recompute cached sidereal outputs, including vargas, strength and dates whose result depends on the corrected angles. Stored J2000 references and named mean/true choices remain unchanged.
• Personalized Muhurta uses the supplied natal Moon and the effective selected Panchanga ayanamsa. Old results produced with ignored natal inputs or contradictory frame settings are not a compatibility oracle.
• The selected Santhanam D60 deity names change from Kindar to Kinnara, Suddh to Sudha, Dhannayudh to Dandayudha, and Brahman to Bhramana. Compare stable source/ordinal identities rather than display spellings.
• Strict Vedic admission rejects booleans and numeric strings in numeric fields, incomplete body maps, inconsistent node pairs, nonfinite numbers, unsupported selectors and ambiguous datetime inputs. Supply aware ISO civil timestamps where requested. Valid legacy arithmetic is retained except for the documented source and astronomical corrections.
• Repaired Sayanadi, D9, Shadbala, dignity and result-provenance contracts can change previously incorrect results or reject malformed constructed vessels. The owning source and repair receipts are linked from the Vedic register.

New policies are explicit

Existing harmonic varga defaults remain. classical_derived_linear is an explicit D60 degree attribution, not a claim of a direct classical degree prescription. Alternative Chara and Argala profiles do not silently replace the legacy method.

Kalachakra requires bphs_santhanam_longitude_row_cycle_v1, supports levels 1 and 2, and returns nine major-period occurrences. Source-only supplied sidereal calculation requires no kernel. Date composition requires the serving ephemeris; calendar projection requires an explicit savana_360 or julian_365.25 clock. The calendar uses jd_utc; astronomy separately records UT1, TT and TDB. Positive source intervals that cannot be represented at the requested Julian date fail explicitly instead of being rounded away. Active intervals are half-open and lookup does not extend the declared coverage.

Exact source fractions are JSON objects containing decimal-string numerator and denominator fields. Pre-birth antardashas remain in the full tree with a null visible interval. Consumers must preserve occurrence paths, nullable visibility, source decisions and eligibility status (not_evaluated).

REST reports malformed input and coverage/projection limits as 422, unavailable required resources as 503, and internal generated-result defects as sanitized 500 responses. Read error_code and request_id; do not parse private messages.

Resources and excluded work

Packaged asteroid/comet manifests identify external release 2026.10.10.1. The external catalogs are separately acquired resources; updating the Python package does not download or delete them. Historical authority fixtures stay bound to their historical release. See the catalog receipt.

The new products retain documented source, span, depth, node-count and search budgets. Broader traditions, special Lagnas and festival rules are not implied by profile discovery. Unfinished natal-discovery/light-box work and website application deployment are excluded from this release.