This commit is contained in:
Ed Zynda
2026-05-15 13:55:32 +03:00
parent a322dfc59a
commit 03006425fa
-304
View File
@@ -1,304 +0,0 @@
//go:build ignore
// subagent-monitor — live horizontal widget strip for spawned subagents
//
// Subscribes to subagents spawned by the main Kit agent and displays a
// single widget just above the input box. Each subagent occupies one column
// in a side-by-side horizontal layout. Columns show scrolling real-time
// output as the subagent works. When a subagent finishes its column is
// removed automatically.
//
// Yaegi-safe design notes:
// - No sync.Mutex (Yaegi has reflection issues with sync primitives)
// - No channels in maps (Yaegi panics on range over map[string]chan)
// - All ctx.* calls guarded with nil checks
// - Simple data structures only
package main
import (
"fmt"
"strings"
"time"
"kit/ext"
)
// ---------------------------------------------------------------------------
// Per-subagent state
// ---------------------------------------------------------------------------
type submonEntry struct {
id int
callID string
task string
lines []string
started time.Time
elapsed time.Duration
}
const (
submonColWidth = 34 // visible character width per column
submonMaxLines = 5 // scrolling output lines per column
submonColGap = 2 // spaces between columns
)
// ---------------------------------------------------------------------------
// Package-level state - all simple types
// ---------------------------------------------------------------------------
var (
submonCtx ext.Context
submonHasCtx bool
submonEntries []*submonEntry
submonNextID int
)
func submonInit() {
submonEntries = nil
submonNextID = 1
}
// ---------------------------------------------------------------------------
// String helpers
// ---------------------------------------------------------------------------
func submonPad(s string, w int) string {
r := []rune(s)
if len(r) >= w {
return string(r[:w])
}
return s + strings.Repeat(" ", w-len(r))
}
func submonTrunc(s string, w int) string {
r := []rune(s)
if len(r) <= w {
return s
}
if w <= 1 {
return "…"
}
return string(r[:w-1]) + "…"
}
// ---------------------------------------------------------------------------
// Widget rendering
// ---------------------------------------------------------------------------
func submonRenderColumn(e *submonEntry) []string {
var rows []string
// Calculate elapsed time on-demand to avoid race conditions with ticker
elapsed := e.elapsed
if elapsed == 0 && !e.started.IsZero() {
elapsed = time.Since(e.started)
}
secs := int(elapsed.Seconds())
timeStr := fmt.Sprintf("%ds", secs)
taskMax := submonColWidth - len(timeStr) - 3
taskPart := submonTrunc(e.task, taskMax)
header := fmt.Sprintf("#%d %s %s", e.id, taskPart, timeStr)
rows = append(rows, submonPad(header, submonColWidth))
display := e.lines
if len(display) > submonMaxLines {
display = display[len(display)-submonMaxLines:]
}
for _, l := range display {
rows = append(rows, submonPad(" "+submonTrunc(l, submonColWidth-2), submonColWidth))
}
for len(rows) < submonMaxLines+1 {
if len(rows) == 1 && len(e.lines) == 0 {
rows = append(rows, submonPad(" waiting…", submonColWidth))
} else {
rows = append(rows, strings.Repeat(" ", submonColWidth))
}
}
return rows
}
func submonBuildWidget() string {
if len(submonEntries) == 0 {
return ""
}
numCols := len(submonEntries)
numRows := submonMaxLines + 1
cols := make([][]string, numCols)
for i, e := range submonEntries {
rows := submonRenderColumn(e)
col := make([]string, numRows)
for j := 0; j < numRows; j++ {
if j < len(rows) {
col[j] = rows[j]
} else {
col[j] = strings.Repeat(" ", submonColWidth)
}
}
cols[i] = col
}
gap := strings.Repeat(" ", submonColGap)
var sb strings.Builder
for row := 0; row < numRows; row++ {
for ci := range cols {
if ci > 0 {
sb.WriteString(gap)
}
sb.WriteString(cols[ci][row])
}
if row < numRows-1 {
sb.WriteString("\n")
}
}
return sb.String()
}
func submonPushWidget() {
if !submonHasCtx {
return
}
if submonCtx.SetWidget == nil {
return
}
text := submonBuildWidget()
if len(submonEntries) == 0 {
if submonCtx.RemoveWidget != nil {
submonCtx.RemoveWidget("submon")
}
return
}
submonCtx.SetWidget(ext.WidgetConfig{
ID: "submon",
Placement: ext.WidgetAbove,
Content: ext.WidgetContent{Text: text},
Style: ext.WidgetStyle{BorderColor: "#89b4fa"},
Priority: 0,
})
}
func submonAppendLine(e *submonEntry, line string) {
line = strings.TrimRight(line, "\r\n")
if strings.TrimSpace(line) == "" {
return
}
e.lines = append(e.lines, line)
}
// ---------------------------------------------------------------------------
// Init
// ---------------------------------------------------------------------------
func Init(api ext.API) {
submonInit()
api.OnSessionStart(func(_ ext.SessionStartEvent, ctx ext.Context) {
submonCtx = ctx
submonHasCtx = true
submonInit()
if ctx.RemoveWidget != nil {
ctx.RemoveWidget("submon")
}
})
api.OnAgentEnd(func(_ ext.AgentEndEvent, ctx ext.Context) {
submonCtx = ctx
submonHasCtx = true
})
// ── SubagentStart ────────────────────────────────────────────────────────
api.OnSubagentStart(func(e ext.SubagentStartEvent, ctx ext.Context) {
submonCtx = ctx
submonHasCtx = true
id := submonNextID
submonNextID++
entry := &submonEntry{
id: id,
callID: e.ToolCallID,
task: e.Task,
started: time.Now(),
}
submonEntries = append(submonEntries, entry)
submonPushWidget()
})
// ── SubagentChunk ────────────────────────────────────────────────────────
api.OnSubagentChunk(func(e ext.SubagentChunkEvent, ctx ext.Context) {
submonCtx = ctx
submonHasCtx = true
var entry *submonEntry
for _, en := range submonEntries {
if en.callID == e.ToolCallID {
entry = en
break
}
}
if entry == nil {
return
}
switch e.ChunkType {
case "text":
for _, line := range strings.Split(e.Content, "\n") {
submonAppendLine(entry, line)
}
case "tool_call":
submonAppendLine(entry, "→ "+e.ToolName)
case "tool_execution_start":
submonAppendLine(entry, "⚙ "+e.ToolName)
case "tool_result":
if e.IsError {
submonAppendLine(entry, "✗ "+e.ToolName)
} else {
submonAppendLine(entry, "✓ "+e.ToolName)
}
}
submonPushWidget()
})
// ── SubagentEnd ──────────────────────────────────────────────────────────
api.OnSubagentEnd(func(e ext.SubagentEndEvent, ctx ext.Context) {
submonCtx = ctx
submonHasCtx = true
var entry *submonEntry
for _, en := range submonEntries {
if en.callID == e.ToolCallID {
entry = en
break
}
}
if entry != nil {
entry.elapsed = time.Since(entry.started)
if e.ErrorMsg != "" {
submonAppendLine(entry, "✗ "+submonTrunc(e.ErrorMsg, submonColWidth-2))
}
}
submonPushWidget()
// Remove the entry immediately (no goroutine to avoid races)
newEntries := submonEntries[:0]
for _, en := range submonEntries {
if en.callID != e.ToolCallID {
newEntries = append(newEntries, en)
}
}
submonEntries = newEntries
submonPushWidget()
})
// ── SessionShutdown ──────────────────────────────────────────────────────
api.OnSessionShutdown(func(_ ext.SessionShutdownEvent, ctx ext.Context) {
submonInit()
// Guard ctx access - may be nil during shutdown
if ctx.RemoveWidget != nil {
ctx.RemoveWidget("submon")
}
})
}