404 brain not found (@404_brain_not_found)

404 brain not found@404_brain_not_found·1w ago

Best prompt for analyzing a spreadsheet with AI

A data-audit-first prompt for cleaning tabular data, calculating defensible metrics, surfacing anomalies, and producing decision-ready outputs.

404 brain not found

# Best prompt for analyzing a spreadsheet with AI Act as a analytics lead. ## Goal Turn a spreadsheet into reproducible findings without silently changing the source data. ## Inputs - workbook and sheet descriptions - business question - metric definitions - time period and comparison groups If a required input is missing, ask concise questions or mark the assumption explicitly. Do not silently in

ChatGPTcodex

Use the attached prompt by replacing its input bullets with the real context. The strongest results come from evidence-bearing inputs and explicit success criteria. The required deliverables are: data quality report, metric table, anomalies and drivers, decision summary with reproducible method.

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4000

404 brain not found@404_brain_not_found·1w ago

How do I write a SKILL.md for an AI agent?

A concise workflow for turning a repeated task into a discoverable, bounded, and testable agent skill.

404 brain not found

# How do I write a SKILL.md for an AI agent? Act as a agent workflow designer. ## Goal Write a compact skill.md that triggers correctly and guides reliable execution. ## Inputs - three example user requests - required tools or files - fragile steps - expected output and validation If a required input is missing, ask concise questions or mark the assumption explicitly. Do not silently invent operat

Claudeclaude-opus-4.6

Use the attached prompt by replacing its input bullets with the real context. The strongest results come from evidence-bearing inputs and explicit success criteria. The required deliverables are: skill name, frontmatter, instruction body, validation scenarios.

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4000

404 brain not found@404_brain_not_found·2w ago

Forked from@hoomehr/Cutting our EKS bill by 60% without touching autoscaling

Cutting our EKS bill by 60% without touching autoscaling

Claude walked through the node group sizing, spot mix and the two Terraform changes that actually moved the number.

404 brain not found

Our EKS bill jumped from $4.2k to $11k/month after we moved three services over. Autoscaling is on. Where do I even start looking?

Claudeclaude-opus-4.5

Autoscaling being "on" usually isn't the problem — the problem is what it is *allowed to scale to*.

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404 brain not found@404_brain_not_found·2w ago

Why Postgres ignored my index (and the ANALYZE that fixed it)

A 40-second query that should have been 8ms. The plan was right; the statistics were four months stale.

404 brain not found

This query does a seq scan on a 40M row table even though there's an index on `created_at`: ```sql select * from events where created_at > now() - interval '1 hour' order by created_at desc limit 100; ```

Claudeclaude-opus-4.5

Get the plan with real numbers first: ```sql explain (analyze, buffers) select * from events where created_at > now() - interval '1 hour' order by created_at desc limit 100; ``` The thing to compare is `rows=` (the estimate) against `actual rows=`. If the planner thinks the predicate matches millions of rows, a seq scan is the *correct* choice given what it believes — the bug is in what it believes, not in how it decided. On an append-only events table this is usually stale statistics: the planner's histogram thinks the newest `created_at` is months old, so "the last hour" looks like it covers

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Best prompt for analyzing a spreadsheet with AI

How do I write a SKILL.md for an AI agent?

Cutting our EKS bill by 60% without touching autoscaling

Why Postgres ignored my index (and the ANALYZE that fixed it)