Check Prereqs

check-prereqs

Read-only environment survey. Never installs anything; never mutates the filesystem. Flow:

1. Run bin/check-prereqs.sh. Default output is a human-readable table

showing every prereq nyann touches, classified as hard (nyann exits 1 without it) or soft (feature-gated skip).

1. If the user passes the word json / "machine-readable" / similar,

add --json so output is structured for scripting.

1. Exit code from the script is the signal:

• 0 → all hard prereqs present. Soft misses are informational.
• 1 → at least one hard prereq is missing. Tell the user explicitly

that nyann cannot run yet, and point them at the install hint from the table.

What to do after

• Soft misses aren't blockers, but each gates a specific feature. Offer

to explain which feature needs which tool. Don't install anything on the user's behalf — just read the hint column back and let them decide.

• If the user asks "install these for me", decline politely — nyann

doesn't bulk-install system packages. Direct them to the copy-pasteable install lines in the hint column.

When to hand off

• User asks "OK, now bootstrap this repo" → route to the

bootstrap-project skill.

• User asks "what does do in nyann?" → explain the feature(s) it

gates (README has a table per soft dep).

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: thettwe
• Source: thettwe/nyann
• License: MIT

Install and usage instructions live in the source repository linked above.