Rename Fantasy* types to LLM* and remove GenerateResult alias

- FantasyMessage -> LLMMessage
- FantasyUsage -> LLMUsage
- FantasyResponse -> LLMResponse
- Remove confusing GenerateResult = TurnResult alias
- Update documentation in SKILL.md

pkg/kit/kit.go

@@ -1223,16 +1223,16 @@ type TurnResult struct {
 	// TotalUsage is the aggregate token usage across all steps in the turn
 	// (includes tool-calling loop iterations). Nil if the provider didn't
 	// report usage.
-	TotalUsage *FantasyUsage
+	TotalUsage *LLMUsage
 
 	// FinalUsage is the token usage from the last API call only. Use this
 	// for context window fill estimation (InputTokens + OutputTokens ≈
 	// current context size). Nil if unavailable.
-	FinalUsage *FantasyUsage
+	FinalUsage *LLMUsage
 
 	// Messages is the full updated conversation after the turn, including
 	// any tool call/result messages added during the agent loop.
-	Messages []FantasyMessage
+	Messages []LLMMessage
 }
 
 // ---------------------------------------------------------------------------
@@ -1280,7 +1280,7 @@ type SubagentResult struct {
 	// StopReason is the LLM's finish reason for the subagent's final turn.
 	StopReason string
 	// Usage contains token usage from the subagent's run.
-	Usage *FantasyUsage
+	Usage *LLMUsage
 	// Elapsed is the total execution time.
 	Elapsed time.Duration
 }

pkg/kit/types.go

@@ -78,10 +78,6 @@ type MCPServerConfig = config.MCPServerConfig
 // AgentConfig holds configuration options for creating a new Agent.
 type AgentConfig = agent.AgentConfig
 
-// GenerateResult contains the result and conversation history from an agent
-// interaction.
-type GenerateResult = agent.GenerateWithLoopResult
-
 type (
 	// ToolCallHandler is a function type for handling tool calls as they happen.
 	ToolCallHandler = agent.ToolCallHandler
@@ -130,18 +126,18 @@ type ModelsRegistry = models.ModelsRegistry
 // Ollama model loading. Signature: func(fn func() error) error.
 type SpinnerFunc = agent.SpinnerFunc
 
-// ==== Fantasy Types (re-exported) ====
+// ==== LLM Types (re-exported from charm.land/fantasy) ====
 
-// FantasyMessage is the underlying message type used by the fantasy agent
-// library. Re-exported so SDK users can work with fantasy types without a
+// LLMMessage is the underlying message type used by the LLM agent
+// library. Re-exported so SDK users can work with LLM types without a
 // direct import of charm.land/fantasy.
-type FantasyMessage = fantasy.Message
+type LLMMessage = fantasy.Message
 
-// FantasyUsage contains token usage information from an LLM response.
-type FantasyUsage = fantasy.Usage
+// LLMUsage contains token usage information from an LLM response.
+type LLMUsage = fantasy.Usage
 
-// FantasyResponse is the response type returned by the fantasy agent library.
-type FantasyResponse = fantasy.Response
+// LLMResponse is the response type returned by the LLM agent library.
+type LLMResponse = fantasy.Response
 
 // ==== Compaction Types (internal/compaction/) ====
 

skills/kit-sdk/SKILL.md

@@ -119,9 +119,9 @@ result, err := host.PromptResult(ctx, "Analyze this file")
 // result.Response     — assistant's text
 // result.StopReason   — "stop", "length", "tool-calls", "error", etc.
 // result.SessionID    — session UUID
-// result.TotalUsage   — aggregate tokens across all steps (*kit.FantasyUsage)
+// result.TotalUsage   — aggregate tokens across all steps (*kit.LLMUsage)
 // result.FinalUsage   — tokens from last API call only
-// result.Messages     — full updated conversation ([]kit.FantasyMessage)
+// result.Messages     — full updated conversation ([]kit.LLMMessage)
 ```
 
 ### Multimodal with file attachments
@@ -525,7 +525,7 @@ result, err := host.Subagent(ctx, kit.SubagentConfig{
     },
 })
 // result.Response, result.Error, result.SessionID, result.StopReason
-// result.Usage (*kit.FantasyUsage), result.Elapsed (time.Duration)
+// result.Usage (*kit.LLMUsage), result.Elapsed (time.Duration)
 ```
 
 ### Subscribing to subagent events from parent
@@ -593,8 +593,8 @@ kit.Config, kit.MCPServerConfig
 // Provider types
 kit.ProviderConfig, kit.ProviderResult, kit.ModelInfo, kit.ModelCost, kit.ModelLimit
 
-// Fantasy types (from charm.land/fantasy)
-kit.FantasyMessage, kit.FantasyUsage, kit.FantasyResponse
+// LLM types (from charm.land/fantasy)
+kit.LLMMessage, kit.LLMUsage, kit.LLMResponse
 
 // Compaction types
 kit.CompactionResult, kit.CompactionOptions