Add Claude Code skills for calculator dev + debugging#159
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10 July Release to Production
Fix misleading error message on the Interest Rate tab when no meaningful rate exists
A four-phase change/debug loop tailored to this repo's manual-verification workflow (no test suite; per-file calculator math). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jenbreese
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… loop-back Fold in the strongest ideas from a peer's debug-loop skill: - description now excludes feature/refactor/style-only changes - Run phase handles the "cannot reproduce" case explicitly - Propose requires a falsifiable hypothesis - adds an explicit verify-fails -> re-Observe loop-back with a report gate Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A mathematically rigorous accounting/finance persona for deriving, reviewing, and auditing the calculators' financial math: derive from first principles, cross-check by an independent method (amortization schedule), and probe boundary cases (zero rate, payment <= interest, high rate, bad input). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- new-calculator: scaffold a calculator following the self-contained TVM pattern (typed constants, CONSTRAINTS, FieldError[] validation, string inputs, dark-mode tokens, aria). - calculator-qa: manual QA checklist (boundaries, currency input, validation, dark mode, a11y, basePath/iframe) since the repo has no test suite. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Adds a set of project skills under .claude/skills/ plus CLAUDE.md project guidance. No runtime/app code is touched — this is tooling for working in the repo.
What's included
run-observe-propose-verify — a disciplined debug loop (Run → Observe → Propose → Verify) with an explicit can't-reproduce branch and a verify-fails loop-back, tuned to this repo's manual-verification workflow.
rigorous-accountant — a mathematically rigorous accounting/finance persona for deriving, reviewing, and auditing the calculators' financial math (derive from first principles, cross-check against an amortization schedule, probe boundary cases).
new-calculator — scaffolds a new app/interactives//page.tsx following the established self-contained pattern from the time-value-money reference (typed constants, CONSTRAINTS, FieldError[] validation, string-based inputs, dark-mode tokens, aria).
calculator-qa — a manual QA checklist (boundaries, currency input, validation, dark mode, accessibility, basePath/iframe), since the repo has no automated test suite.
CLAUDE.md — project guidance for Claude Code.
Notes
Skills auto-surface via their description triggers, or can be invoked explicitly (/new-calculator, etc.). They only shape how Claude behaves in-session — they don't add build/deploy automation.
The skills cross-reference each other (e.g. new-calculator and calculator-qa defer to rigorous-accountant for the math).
🤖 Generated with Claude Code