Update all SOUL.md documentation to reflect that it now occupies
slot #1 in the system prompt, replacing the hardcoded default identity.
Updated pages:
- user-guide/features/personality.md — SOUL.md is primary identity, not just a layer
- developer-guide/prompt-assembly.md — updated prompt layer order, context files list
- guides/use-soul-with-hermes.md — SOUL.md replaces built-in identity
- user-guide/configuration.md — updated context files table and directory tree
Co-authored-by: Test <test@test.com>
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