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skills/bin/check-surfaces
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mathias 90a58f0b9e
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feat(skills): declare which surfaces each skill ships to
The repo distributes three ways — the Claude Code plugin, the symlinked
library for Crush/Pi/OpenCode, and claude.ai, which has no fetch path at all —
and treated every skill as belonging to all of them. claude.ai is not a fourth
host to mirror: gitea-ci, playwright and web-shot have no shell and no cluster
there, so a flat mirror installs skills that can never fire and degrades
selection for the ones that can.

Every SKILL.md now carries `surfaces:`, defaulting to [claude-code, library];
dream, own-the-task and grill-me add `chat`, matching what is actually
installed on claude.ai today. Claude Code accepts the extra key —
`claude plugin validate` passes and the skills still load.

bin/check-surfaces validates values, not just presence, because the failure
mode here is silent: a wrong surface removes a skill from a harness rather than
erroring. install.sh links only skills whose surfaces include `library`, and a
source that declares nothing at all is treated as foreign and linked as-is —
Anthropic's official set has no reason to know this convention. doctor's
missing-link check skips non-library skills for the same reason.

Refs #29
Bump-Type: minor
2026-08-29 10:09:52 +02:00

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#!/bin/sh
# check-surfaces — every skill declares which surfaces it ships to, and only
# names surfaces that exist.
#
# The repo distributes three ways: the Claude Code plugin, the symlinked
# library (Crush/Pi/OpenCode), and claude.ai, which has no fetch path at all.
# Treating every skill as belonging to all three installs skills that can never
# fire — gitea-ci, playwright and web-shot have no shell or cluster in a chat
# surface — and degrades selection for the ones that can (#29).
#
# Values are validated, not merely counted: a wrong surface silently removes a
# skill from a harness rather than erroring, which is the failure mode this
# whole file exists to prevent.
#
# Usage: check-surfaces [checkout-root]
set -u
ROOT=${1:-$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)}
ALLOWED='claude-code library chat'
fail=0
for dir in "$ROOT"/skills/*/; do
[ -f "$dir/SKILL.md" ] || continue
name=$(basename "$dir")
line=$(sed -n 's/^surfaces:[[:space:]]*//p' "$dir/SKILL.md" | head -1)
if [ -z "$line" ]; then
echo "ERROR: skills/$name declares no 'surfaces:' — say where it ships (${ALLOWED% *}, ${ALLOWED##* })" >&2
fail=1
continue
fi
values=$(printf '%s' "$line" | tr -d '[]' | tr ',' ' ')
count=0
for v in $values; do
count=$((count + 1))
case " $ALLOWED " in
*" $v "*) ;;
*) echo "ERROR: skills/$name names surface '$v', which does not exist — allowed: $ALLOWED" >&2; fail=1 ;;
esac
done
[ "$count" -gt 0 ] || {
echo "ERROR: skills/$name has an empty 'surfaces:' list — a skill that ships nowhere should be deleted, not declared" >&2
fail=1
}
done
exit $fail