Based on evaluation runs against the default model:
- prose + speeches: when a length/duration is given, hold it strictly with a
maximum ±5% deviation (the model systematically ran ~20-25% short).
- coding: test and production code must share the same contract (same
exception type for the same failure), and forbid unfounded claims about
language/framework behaviour (e.g. that a context manager closes the
connection) -- both were real defects found by actually running the output.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
dschlueter
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