Pitru Paksha flag

derived.pitru-paksha

Bhadrapada Krishna Paksha is classified as the ancestral fortnight.

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

Remove Adhika or Nija display prefixes, then require base Maasam Bhadrapada and Paksham Krishna.

Process

1. Return false if Maasam or Paksham is missing.
2. Strip a leading Adhika or Nija prefix from Maasam.
3. Return true only when the base month is Bhadrapada and Paksham is Krishna.

Worked example

Nija Bhadrapada Krishna

Inputs

• Maasam: Nija Bhadrapada
• Paksham: Krishna

Calculation

1. Strip Nija to obtain Bhadrapada.
2. Both required values match.

Result

• Pitru Paksha: true

Method notes

• The flag covers the Krishna-paksha portion implemented by this Telugu Amanta convention.

Contract

Owning layer: derived
Claim kind: regional-convention
Time basis: Telugu Amanta month and fortnight for the Panchangam day.

Inputs

• Maasam
• Paksham

Outputs

• Pitru Paksha boolean

References and evidence

Evidence classes: textual, regional_convention
Verification states: needs_locator

The Telugu regional convention is tested but not yet claim-located independently.

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_pitru_paksha.py

Run the linked tests, then the complete offline contract:

python tools/verify_project.py

Public surfaces

• python-library
• mcp
• website

Limitations

• Other regional month conventions can place the named fortnight differently.

Implementation

• owner: telugu_panchangam/pitru_paksha.py — is_pitru_paksha_day

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