feat: add userPrompts config field for active global rules

- Add UserPrompts Prompt field to AgentConfig (same JSON format as prompt).
- Resolve userPrompts via resolvePrompt() in BuildRuntime, store in Runtime.UserPrompt.
- Prepend resolved user prompts to every user message at executeTurn start.
- Document userPrompts in data/agents/README.md.

cmd/olliesrv/internal/agent/agent_config.go

@@ -24,6 +24,7 @@ func (p *Prompt) UnmarshalJSON(data []byte) error {
 
 type AgentConfig struct {
 	Prompt      Prompt   `json:"prompt,omitempty"`
+	UserPrompts Prompt   `json:"userPrompts,omitempty"`
 	Backend     string   `json:"backend,omitempty"`
 	Model       string   `json:"model,omitempty"`
 	Tools       *bool    `json:"tools,omitempty"`

cmd/olliesrv/internal/agent/runtime.go

@@ -129,16 +129,17 @@ func RenderTools(infos []toolsrv.ToolInfo) string {
 // agent. The agent struct stores a pointer to the active Runtime; switching
 // agents replaces it atomically.
 type Runtime struct {
-	Backend    backend.Backend
-	ToolServer *toolsrv.Conn
-	Preamble   *Preamble
-	Tools      []backend.Tool
-	ToolMeta   map[string]toolsrv.ToolInfo
-	Exec       toolExecutor
-	GenParams  backend.GenerationParams
-	MaxSteps   int
+	Backend     backend.Backend
+	ToolServer  *toolsrv.Conn
+	Preamble    *Preamble
+	Tools       []backend.Tool
+	ToolMeta    map[string]toolsrv.ToolInfo
+	Exec        toolExecutor
+	GenParams   backend.GenerationParams
+	MaxSteps    int
 	CompactionModel string
-	Messages        []string
+	UserPrompt  string // resolved user prompts, prepended to each turn's input
+	Messages    []string
 }
 
 // PreambleString returns the fully rendered system prompt.
@@ -167,6 +168,7 @@ func BuildRuntime(cfg *AgentConfig, srv *toolsrv.Conn, cwd string, env []string,
 	}
 
 	var agentPrompt string
+	var userPrompt string
 	var genParams backend.GenerationParams
 	var maxSteps int
 	if cfg != nil {
@@ -175,6 +177,11 @@ func BuildRuntime(cfg *AgentConfig, srv *toolsrv.Conn, cwd string, env []string,
 		} else {
 			agentPrompt = resolved
 		}
+		if resolved, err := resolvePrompt(cfg.UserPrompts, cwd, env); err != nil {
+			fmt.Fprintf(os.Stderr, "resolve user prompts: %v\n", err)
+		} else {
+			userPrompt = resolved
+		}
 		genParams = cfg.GenerationParams
 		maxSteps = cfg.MaxSteps
 	}
@@ -221,6 +228,7 @@ func BuildRuntime(cfg *AgentConfig, srv *toolsrv.Conn, cwd string, env []string,
 		GenParams:       genParams,
 		MaxSteps:        maxSteps,
 		CompactionModel: compactionModel,
+		UserPrompt:      userPrompt,
 		Messages:        messages,
 	}
 }

cmd/olliesrv/internal/agent/turn.go

@@ -84,6 +84,11 @@ func (ag *Agent) Submit(ctx context.Context, input string) {
 // executeTurn runs a single agent turn and returns the next prompt to execute,
 // or "" if there is nothing more to do.
 func (ag *Agent) executeTurn(ctx context.Context, input string) string {
+	// Prepend resolved user prompts (active global rules) to the user input.
+	if ag.runtime.UserPrompt != "" {
+		input = ag.runtime.UserPrompt + "\n\n" + input
+	}
+
 	ag.emit(Event{Role: "user", Content: input})
 
 	// Snapshot messages before this turn modifies them. Restored on context