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Ledger errors should name the invariant they protect

Ledger errors should name the invariant they protect

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Comments 5
6 min read
You Can’t Automate My Intuition! – Confessions of a Bitter Excel Consultant | BIGF Paradigm Shift Part 2

You Can’t Automate My Intuition! – Confessions of a Bitter Excel Consultant | BIGF Paradigm Shift Part 2

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2 min read
Parsing OFX bank files by hand: SGML without end tags, GMT dates and backwards card signs

Parsing OFX bank files by hand: SGML without end tags, GMT dates and backwards card signs

Comments 1
4 min read
Parsing QFX files: an annotated sample, FITID dedupe, and the pitfalls that bite

Parsing QFX files: an annotated sample, FITID dedupe, and the pitfalls that bite

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Comments 1
4 min read
Adding Pay by Bank to WooCommerce: setup, sandbox testing, and the webhook setting people miss

Adding Pay by Bank to WooCommerce: setup, sandbox testing, and the webhook setting people miss

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Comments 8
3 min read
RBAC Isn’t a Checkbox: Why Permission Structures Are Getting Regulatory Attention

RBAC Isn’t a Checkbox: Why Permission Structures Are Getting Regulatory Attention

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6 min read
Fintech Welcome Email Problems — Auditing Transactional Bounce Handling Without SMTP

Fintech Welcome Email Problems — Auditing Transactional Bounce Handling Without SMTP

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5 min read
ERC-20 amounts are meaningless without the token's decimals

ERC-20 amounts are meaningless without the token's decimals

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6 min read
Who Authenticated the Agent? Building Identity for AI That Acts on a Customer’s Behalf

Who Authenticated the Agent? Building Identity for AI That Acts on a Customer’s Behalf

Comments 1
3 min read
ACH Return Codes Explained: Building Resilient Payout Logic for Sports & Gaming Platforms

ACH Return Codes Explained: Building Resilient Payout Logic for Sports & Gaming Platforms

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3 min read
Idempotency belongs in the ledger, not in every caller

Idempotency belongs in the ledger, not in every caller

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5 min read
What regulators, banks and consultancies say about controlling AI agent spending (11 documents, 2026)

What regulators, banks and consultancies say about controlling AI agent spending (11 documents, 2026)

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4 min read
Why Money Calculations Should Not Use Floating Point

Why Money Calculations Should Not Use Floating Point

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10 min read
Por Que uma Transação com Chip é Mais Segura

Por Que uma Transação com Chip é Mais Segura

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3 min read
I built a social fintech platform solo, no co-founder, no funding, no CS degree. Here's AURUM.

I built a social fintech platform solo, no co-founder, no funding, no CS degree. Here's AURUM.

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1 min read
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