Evidence carried the first 200 characters of every message the agent read.
Remove it: messages now report identity and provenance only.
Message content is caller-supplied and unbounded -- up to MAX_MESSAGE_SIZE,
25k characters -- and a single answer can touch a few hundred messages across
its search, grep and date-range tools. Carrying even a slice of each invites
callers to read messages in bulk out of evidence rather than fetching the ones
they want, which is the opposite of what this is for: evidence is an audit and
analytics surface, not a read API and not something to sit in a hot path.
Conclusions keep their text, which is the asymmetry worth stating. A
conclusion is written by the deriver, is short, and is the thing being
audited; a message is raw input that already has endpoints of its own.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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