Panchaka Nakshatra flag

derived.panchaka-nakshatra

Dhanishtha through Revati are marked for activity-specific Panchaka restrictions.

Assurance

Level	Current statement
Documented and traceable	Yes — the canonical record includes the process and a worked example.
Regression or reproduction checked	Linked to 1 repository test file(s).
Independently source-supported	Not recorded as independently verified. The disclosed provenance state remains authoritative.

Computation method

Method type: decision-table

Test exact membership in the five-name Panchaka Nakshatra set.

Process

1. Read the active Nakshatra name.
2. Return true for Dhanishtha, Shatabhisha, Purva Bhadrapada, Uttara Bhadrapada, or Revati.
3. Return false for every other string.

Worked example

Revati membership

Inputs

• Nakshatra: Revati

Calculation

1. Revati is in PANCHAKA_NAKSHATRAS.

Result

• Panchaka Nakshatra: true

Method notes

• The implementation deliberately treats all of Dhanishtha as Panchaka; it does not calculate a half-Nakshatra boundary.

Contract

Owning layer: derived
Claim kind: textual-rule
Time basis: Active Nakshatra.

Inputs

• Nakshatra name

Outputs

• Panchaka membership boolean

References and evidence

Evidence classes: textual
Verification states: needs_locator

The set is tested; individual activity consequences have separate provenance where available.

panchangam.derived_classifications

Evidence class: textual
Verification state: needs_locator
Locator: No precise locator is registered.

Scope: Special Yogas, Panchaka labels, Khara month, Pitru Paksha, Simha-Stha, Maudhya, Anandadi Yoga, Disha Shoola, Nakshatra Mukha and Panchaka Rahita are separate traditional classifications. The group exists to expose evidence debt and grants no umbrella textual authority; each component needs its own inspected rule table and regional boundary.

Sources

• Muhurtha (Electional Astrology) — B. V. Raman; UBS Publishers' Distributors, 1993, ISBN 9788185674681, 181 catalogued pages; authority type: modern_synthesis
• Muhurta Chintamani — Rama Daivajna; Undated Sanskrit text with Hindi commentary, Internet Archive identifier muhurta-chintamani-hindi; authority type: primary_text_hindi_commentary

The complete machine-readable source registry is available in provenance.json. A regression fixture or same-code reproduction is not independent verification.

Reproduce and review

• tests/test_panchaka_nakshatras.py

Run the linked tests, then the complete offline contract:

python tools/verify_project.py

Public surfaces

• python-library
• mcp
• website

Limitations

• Restrictions are activity-specific and should not be presented as a universal prohibition.

Implementation

• owner: telugu_panchangam/nakshatra_filters.py — is_panchaka_nakshatra

This route is generated from computations.json. Edit the registry and canonical reference prose in the same pull request as a behavior change.