Blog post: skill anatomy, python helpers vs pure-prompt #20
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Originally filed by @coilysiren on 2026-05-03T19:53:13Z - https://github.com/coilysiren/website/issues/1340
Inspiration:
anthropics/skills- public reference skills including the production xlsx / pdf / pptx / docx skills that power Claude's document features. They lean heavily on Python helpers, not pure prompts.Joins against: the "Bias toward Python helpers, not pure-prompt skills" rule in
coilyco-ai/AGENTS.md, the cognition stack (log-sessions,session-rollup,reading-list,pulse).Anthropic's open skills are the strongest public example of the helpers-over-prompts pattern. Kai independently arrived at the same rule and runs an actual production stack on it. A blog post that walks the pattern: prompt is for narrative, Python is for data, with a side-by-side comparison against Anthropic's xlsx skill and Kai's
log-sessions. Lands a third spot in the existing blog series alongside coily-as-boundary and gauntlet, and is the only one that's specifically about how to author with Claude rather than how to operate Claude.Moved from coilysiren/coilyco-ai#42.
Iceboxed in the 2026-05-29 backlog burn-down: Speculative blog post draft. Reopen anytime if it becomes real.