- Add systemPrompt field to GenerationParams and config structs
- On init, replace default system prompt with per-model prompt when
user hasn't explicitly set one (via flag, config, or SDK option)
- On model switch, detect per-model prompt and compose it with
AGENTS.md, skills, and date/cwd context
- Fix viper.IsSet bug: BindPFlag causes IsSet to return true for
unset flags, so compare against defaultSystemPrompt instead
- Agent.SetModel now updates stored system prompt from config
- Export LoadModelSettingsFromConfig, LoadSystemPromptValue, and
LookupModelForSettings for use by Kit.SetModel
- Add tests for prompt apply, precedence, file path, and
modelSettings override
- Add modelSettings config section for attaching generation params
(temperature, topP, topK, frequencyPenalty, presencePenalty,
maxTokens, stopSequences, thinkingLevel) to any model by
provider/model key
- Add params field to customModels definitions for inline defaults
- Change BuildProviderConfig and SetModel to use viper.IsSet so
unset params remain nil, allowing model-level defaults to apply
- Wire ApplyModelSettings into CreateProvider with priority order:
CLI flags > global config > modelSettings > customModels params
- Add GenerationParams to ModelInfo in the registry
- Update default config template with modelSettings and customModels
params examples
Ed Zynda