§05 — Journal
Notes from the practice.
Long-form writing on data, AI, and engagement — published when we have something worth saying.
Featured · 2026 · 04 · 21 · Notes
The day we said no to a £180k engagement
On scoping discipline, the difference between a fit and a paying client, and why turning down work is part of the offering.
6 min read · Read the entry →
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2026 · 03 · 14
Method
A one-page scope, dissected
9 min
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2026 · 02 · 02
Notes
Why we don't bill for hours any more
4 min
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2026 · 01 · 10
Field
Eval harnesses for LLM agents in production
12 min
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2025 · 12 · 04
Method
dbt contracts: how strict is too strict
7 min
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2025 · 11 · 18
Notes
Cost-optimising a £40k/month BigQuery bill
8 min
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2025 · 10 · 02
Field
When LangGraph is, and isn't, the right tool
11 min
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