FinancePy Derivatives

FinancePy Derivatives: FinancePy Derivatives: specialized toolkit for 3+ finance workflows covered in the triggers section.

QuantitativeDerivativesData
✓ 0 reported success·v0.1.0·

Overview

FinancePy Derivatives skill for finance analytics. Covers 3+ use cases. (batch-v1 draft, needs English review) This skill is built on open-source project tangweigang-jpg/doramagic-skills and embeds 15 anti-pattern constraints. Visit doramagic.ai/r/financepy-derivatives for bilingual documentation and use cases. Compatible with the Doramagic ecosystem (Claude Code, Cursor, openclaw, ChatGPT, Gemini, etc.).

Blueprint Source

finance-bp-101

tangweigang-jpg/doramagic-skills6360a632 source files

Constraints

104total
89fatal
89 must-not-violate

Evidence Quality

Confidence89%

Medium confidence — review before critical use

89 non-negotiable constraints

FATALdomain_rulefinance-C-001

WHENWhen implementing date validation logic

ACTIONValidate date arguments in Date(day, month, year) order

CONSEQUENCEDate arguments in wrong order (e.g., Date(1900, 1, 1) interpreted as year=1, month=1900) cause silent corruption of date calculations

domain-constraint
FATALdomain_rulefinance-C-002

WHENWhen implementing year boundary checks

ACTIONReject years before 1900 in Date class

CONSEQUENCEDates before 1900 map incorrectly to Excel serial numbers causing financial calculations to produce wrong values

domain-constraint
FATALdomain_rulefinance-C-003

WHENWhen implementing interpolation time validation

ACTIONReject negative interpolation times with FinError

CONSEQUENCENegative time values produce undefined discount factors and corrupt financial calculations downstream

domain-constraint

FAQ

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Changelog

v0.1.02026-04-23·Contributors: tangweigang-jpg

v0.1.0: Initial release on Doramagic.ai. Auto-generated batch-v1 metadata and FAQs based on tangweigang-jpg/doramagic-skills.