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small gleam coding and (not yet) persistent agent daemon with a detachable cli
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Go
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import ( "encoding/json" "strings" "unicode")
// Display-only execution evidence, never appended to the model's tool output.type ToolActivity struct { Kind string `json:"kind"` // "read" | "search" | "list" | "run" Target string `json:"target"` Failed bool `json:"failed,omitempty"`}
type FileChange struct { Path string `json:"path"` Kind string `json:"kind"` // "diff" | "unavailable" Diff string `json:"diff,omitempty"` Added int `json:"added,omitempty"` Removed int `json:"removed,omitempty"` Reason string `json:"reason,omitempty"`}
type ToolTrace struct { Activities []ToolActivity `json:"activities"` Changes []FileChange `json:"changes"` Truncated bool `json:"truncated,omitempty"`}
func isSafeText(s string, limit int) bool { return len(s) <= limit}
// ParseToolTrace validates and extracts a ToolTrace from untyped data.func ParseToolTrace(raw any) *ToolTrace { if raw == nil { return nil }
data, err := json.Marshal(raw) if err != nil { return nil }
var trace ToolTrace if err := json.Unmarshal(data, &trace); err != nil { return nil }
if len(trace.Activities) > 64 || len(trace.Changes) > 16 { return nil }
for _, act := range trace.Activities { switch act.Kind { case "read", "search", "list", "run": default: return nil } if !isSafeText(act.Target, 1000) { return nil } }
for _, ch := range trace.Changes { if !isSafeText(ch.Path, 1000) { return nil } if ch.Kind == "unavailable" { if !isSafeText(ch.Reason, 1000) { return nil } } else if ch.Kind == "diff" { if !isSafeText(ch.Diff, 16000) || ch.Added < 0 || ch.Removed < 0 { return nil } } else { return nil } }
return &trace}
// ToolIntent indicates inferred intent of a tool call.type ToolIntent struct { Kind string `json:"kind"` // "write" | "edit" | "read" | "run" Target string `json:"target"`}
type ToolCodePreview struct { Offset int `json:"offset"` Text string `json:"text"`}
type ToolProgress struct { CallID string `json:"callId"` Name string `json:"name"` Phase string `json:"phase"` // "generating" | "running" Intent *ToolIntent `json:"intent,omitempty"` Code *ToolCodePreview `json:"code,omitempty"`}
type EventType string
const ( EventReset EventType = "reset" EventRetry EventType = "retry" EventText EventType = "text" EventError EventType = "error" EventInterrupted EventType = "interrupted" EventMessage EventType = "message" EventUser EventType = "user" EventThinking EventType = "thinking" EventNote EventType = "note" EventCompacted EventType = "compacted" EventToolProgress EventType = "tool_progress" EventTool EventType = "tool" EventUsage EventType = "usage")
type Usage struct { Model string `json:"model,omitempty"` RecordedAt *int64 `json:"recordedAt,omitempty"` PromptTokens *int `json:"promptTokens,omitempty"` CachedPromptTokens *int `json:"cachedPromptTokens,omitempty"` CacheWriteTokens *int `json:"cacheWriteTokens,omitempty"` CompletionTokens *int `json:"completionTokens,omitempty"` TotalTokens *int `json:"totalTokens,omitempty"` ElapsedMs *float64 `json:"elapsedMs,omitempty"` TokensPerSecond *float64 `json:"tokensPerSecond,omitempty"`}
type StreamEvent struct { Type EventType `json:"type"` Text string `json:"text,omitempty"` Role string `json:"role,omitempty"` // "assistant" Timestamp *int64 `json:"timestamp,omitempty"` Source string `json:"source,omitempty"` TriggeredAt string `json:"triggeredAt,omitempty"` ClientID string `json:"clientId,omitempty"` Image *ImageMetadata `json:"image,omitempty"` Evicted int `json:"evicted,omitempty"` Summary string `json:"summary,omitempty"` Progress *ToolProgress `json:"progress,omitempty"` ToolName string `json:"name,omitempty"` ToolArgs map[string]any `json:"args,omitempty"` ToolResult string `json:"result,omitempty"` ToolTrace *ToolTrace `json:"trace,omitempty"` Usage *Usage `json:"usage,omitempty"` // Replayed marks an event from the transcript snapshot that follows a // reset: history, which says nothing about what the session does now. Replayed bool `json:"-"`}
func sanitizeControlRunes(s string) string { var sb strings.Builder for _, r := range s { if unicode.IsControl(r) || unicode.Is(unicode.Cf, r) { sb.WriteRune(' ') } else { sb.WriteRune(r) } } return sb.String()}