The new guide explains:
- where profiles live
- what belongs in agent.yaml
- how prompt overrides work
- which root /prompts files are useful levers
- how profile-specific Main/Utility models are actually configured via _model_config/config.json
- why that config must be complete, not partial
Add LLM preset selection to project create/edit flows, backed by _model_config scoped project config. Support global, project, and combined preset APIs with explicit metadata while preserving plain YAML preset files. Copy selected preset chat/utility settings into project-scoped config, keep embedding settings from the effective config, and document/test the new project model config paths.
- Change @extensible decorator to generate extension paths from full module and qualname hierarchies instead of flattened names
- Update extension path format from `{module}_{qualname}_{start|end}` to `_functions/<module>/<qualname>/{start|end}`
- Move all extension files to new deep directory structure under `_functions/` to match new path format
- Replace PathSpec.from_lines(GitWildMatchPattern, ...) with PathSpec.from_lines
