first commit

pigo/internal/cli/liveconfig.go

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+// This file defines LiveConfig, the mutable run configuration a control command
+// may change mid-session. It was moved verbatim from cmd/pigo (the former
+// liveRunConfig) and exported so the run, repl, btw, status and goal
+// subpackages can read and mutate it through the Host contract. The run closure
+// reads it on every prompt, so a /model switch takes effect on the next turn.
+// It carries no lock: it is read and written only on the REPL's single main
+// goroutine (slash actions and the run are both invoked synchronously from the
+// REPL loop, never concurrently).
+package cli
+
+import (
+	"github.com/smallnest/pigo/internal/agentcore"
+	"github.com/smallnest/pigo/internal/provider"
+)
+
+// LiveConfig is the mutable run configuration a control command may change
+// mid-session.
+type LiveConfig struct {
+	Model        string
+	ProviderName string
+	Provider     provider.Provider
+	BaseURL      string
+	Protocol     string
+	// ThinkingLevel is the reasoning-effort level applied to each turn. It is
+	// seeded from the resolved config chain and read on every prompt.
+	ThinkingLevel agentcore.ThinkingLevel
+	// ContextWindow is the model's total context-token budget, used to gate
+	// automatic compaction. When 0 the window is unknown and auto-compaction is
+	// disabled; the REPL seeds it with a conservative default so long sessions
+	// still compact rather than overflow.
+	ContextWindow int
+}
+
+// DefaultContextWindow is the fallback context-token budget used when a model's
+// true window is unknown. It is deliberately large so auto-compaction only fires
+// on genuinely long sessions (threshold = window - ReserveTokens), never on
+// ordinary short exchanges.
+const DefaultContextWindow = 128000