composition-snapshot

composition-snapshot

You want to show how a mix shifted over time — sprint shape, fleet rollups, pass/fail by build.

When to use

• You have categorical data captured at a few points in time and want to show how the mix shifted.
• Think sprint shape across iterations, fleet rollups by status, or test pass/fail by build.
• You've used a portfolio-style view for money and want the same clarity for non-financial categories.

Prompt template

Show how the mix changed across these snapshots: <paste categorical CSV>

What you get back

A clean composition view of how categories shift across snapshots, built for non-financial data. This one is newer — the trigger wording is still being confirmed on real use, so treat the output shape as provisional.

Method

The generalised discipline (provisional — this skill is new):

1. Categories over snapshots. The unit is "share of a whole, at points in time".
2. Normalise to compare shape. Percent-of-total makes mixes comparable across snapshots.
3. Read the movement, not the bars. The takeaway is what shifted, stated in words.

Verify it's working

Confirm the skill actually fires — in your own session, on your own data. No data leaves your machine.

1. Does it fire? Paste the prompt in demo-input.md. You should get the shape shown in expected-output.md.

2. On your data. Run it on your real input.

3. Confirm the shape. Save the output to a file and run:

   node ${CLAUDE_SKILL_DIR}/scripts/check.mjs <your-output-file>
   

   It reports ENGAGED when the output carries this skill's characteristic structure — the deterministic sign it fired. It checks shape, not quality; judge the content yourself.

The check runs entirely locally — nothing leaves your machine. If you want to add to the public "confirmed working" count, opt in explicitly:

node ${CLAUDE_SKILL_DIR}/scripts/check.mjs <your-output-file> --report https://skills-field-guide-proxy.nesper6311.workers.dev --skill composition-snapshot

That sends only an anonymous +1 — never your input, output, or identity.

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Installed from the public field guide. Customize freely — this is a starting point built from the published projection of composition-snapshot.