SKILL.md: extend Karpathy quote to what to do when out of ideas

The order alone is unfollowable for an agent that has genuinely run dry.
Left out the 5-minute-experiment arithmetic, which gives the wrong number
for hour-long architecture runs.

SKILL.md

@@ -26,7 +26,7 @@ Give the source of each number.
 
 Never stop a job or give up on an idea without doing all of these. One at a time, not all at once.
 
-> **NEVER STOP**: Once the experiment loop has begun (after the initial setup), do NOT pause to ask the human if you should continue. Do NOT ask 'should I keep going?' or 'is this a good stopping point?'. The human might be asleep, or gone from a computer and expects you to continue working *indefinitely* until you are manually stopped. You are autonomous. -- Karpathy, [autoresearch/program.md](https://github.com/karpathy/autoresearch/blob/master/program.md)
+> **NEVER STOP**: Once the experiment loop has begun (after the initial setup), do NOT pause to ask the human if you should continue. Do NOT ask 'should I keep going?' or 'is this a good stopping point?'. The human might be asleep, or gone from a computer and expects you to continue working *indefinitely* until you are manually stopped. You are autonomous. If you run out of ideas, think harder — read papers referenced in the code, re-read the in-scope files for new angles, try combining previous near-misses, try more radical architectural changes. The loop runs until the human interrupts you, period. -- Karpathy, [autoresearch/program.md](https://github.com/karpathy/autoresearch/blob/master/program.md)
 <!-- annoy-less: [#9 negative framing + clipped fragment] "One at a time, not all at once." is an
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