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Provides sem semantic-diff detection, install-on-first-use, and fallback patterns.
Passed 21 of 22 test cases with the skill, and 11 of 22 without it.
and 12 more in the full report
12 fixed10 passed either way0 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
When checking for semantic diff availability in an interactive workflow and finding `0` in the cache, what user interaction step must occur before proceeding to fallback diff generation?
| Checked | Without skill | With skill |
|---|---|---|
| Presents an installation prompt or offer to the user when detection evaluates to false. | Missed | Passed |
The instructions your model reads when the skill loads.
Foundation patterns for using sem semantic diffs in night-market skills.
Consult this skill when building or modifying skills that consume git diff output. It provides the detection, installation, and fallback patterns.
sem diff yourself)Check sem availability once per session:
# Detection (cache per session)
_sem_check() {
local cache="${CLAUDE_CODE_TMPDIR:-/tmp}/sem-available"
if [ -f "$cache" ]; then
cat "$cache"
return
fi
if command -v sem &>/dev/null; then
echo "1" | tee "$cache"
else
echo "0" | tee "$cache"
fi
}
When _sem_check returns 0, offer installation.
See modules/detection.md for install-on-first-use
logic and platform-specific commands.
test cases passed, vs 11 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.