feat: add compression time to /dcp stats

index.ts

@@ -13,6 +13,7 @@ import {
     createChatMessageHandler,
     createChatMessageTransformHandler,
     createCommandExecuteHandler,
+    createEventHandler,
     createSystemPromptHandler,
     createTextCompleteHandler,
 } from "./lib/hooks"
@@ -57,7 +58,6 @@ const plugin: Plugin = (async (ctx) => {
             config,
             prompts,
         ),
-
         "experimental.chat.messages.transform": createChatMessageTransformHandler(
             ctx.client,
             state,
@@ -76,6 +76,7 @@ const plugin: Plugin = (async (ctx) => {
             ctx.directory,
             hostPermissions,
         ),
+        event: createEventHandler(state, logger),
         tool: {
             ...(config.compress.permission !== "deny" && {
                 compress:

lib/commands/compression-targets.ts

@@ -5,6 +5,7 @@ export interface CompressionTarget {
     runId: number
     topic: string
     compressedTokens: number
+    durationMs: number
     grouped: boolean
     blocks: CompressionBlock[]
 }
@@ -26,6 +27,7 @@ function buildTarget(blocks: CompressionBlock[]): CompressionTarget {
         runId: first.runId,
         topic: grouped ? first.batchTopic || first.topic : first.topic,
         compressedTokens: ordered.reduce((total, block) => total + block.compressedTokens, 0),
+        durationMs: ordered.reduce((total, block) => Math.max(total, block.durationMs), 0),
         grouped,
         blocks: ordered,
     }

lib/commands/stats.ts

@@ -9,6 +9,7 @@ import { sendIgnoredMessage } from "../ui/notification"
 import { formatTokenCount } from "../ui/utils"
 import { loadAllSessionStats, type AggregatedStats } from "../state/persistence"
 import { getCurrentParams } from "../token-utils"
+import { getActiveCompressionTargets } from "./compression-targets"
 
 export interface StatsCommandContext {
     client: any
@@ -20,8 +21,10 @@ export interface StatsCommandContext {
 
 function formatStatsMessage(
     sessionTokens: number,
+    sessionSummaryTokens: number,
     sessionTools: number,
     sessionMessages: number,
+    sessionDurationMs: number,
     allTime: AggregatedStats,
 ): string {
     const lines: string[] = []
@@ -30,11 +33,15 @@ function formatStatsMessage(
     lines.push("│                    DCP Statistics                         │")
     lines.push("╰───────────────────────────────────────────────────────────╯")
     lines.push("")
-    lines.push("Session:")
+    lines.push("Compression:")
     lines.push("─".repeat(60))
-    lines.push(`  Tokens pruned:   ~${formatTokenCount(sessionTokens)}`)
-    lines.push(`  Tools pruned:     ${sessionTools}`)
-    lines.push(`  Messages pruned:  ${sessionMessages}`)
+    lines.push(
+        `  Tokens in|out:    ~${formatTokenCount(sessionTokens)} | ~${formatTokenCount(sessionSummaryTokens)}`,
+    )
+    lines.push(`  Ratio:            ${formatCompressionRatio(sessionTokens, sessionSummaryTokens)}`)
+    lines.push(`  Time:             ${formatCompressionTime(sessionDurationMs)}`)
+    lines.push(`  Messages:         ${sessionMessages}`)
+    lines.push(`  Tools:            ${sessionTools}`)
     lines.push("")
     lines.push("All-time:")
     lines.push("─".repeat(60))
@@ -46,11 +53,55 @@ function formatStatsMessage(
     return lines.join("\n")
 }
 
+function formatCompressionRatio(inputTokens: number, outputTokens: number): string {
+    if (inputTokens <= 0) {
+        return "0:1"
+    }
+
+    if (outputTokens <= 0) {
+        return "∞:1"
+    }
+
+    const ratio = Math.max(1, Math.round(inputTokens / outputTokens))
+    return `${ratio}:1`
+}
+
+function formatCompressionTime(ms: number): string {
+    const safeMs = Math.max(0, Math.round(ms))
+    if (safeMs < 1000) {
+        return `${safeMs} ms`
+    }
+
+    const totalSeconds = safeMs / 1000
+    if (totalSeconds < 60) {
+        return `${totalSeconds.toFixed(1)} s`
+    }
+
+    const wholeSeconds = Math.floor(totalSeconds)
+    const hours = Math.floor(wholeSeconds / 3600)
+    const minutes = Math.floor((wholeSeconds % 3600) / 60)
+    const seconds = wholeSeconds % 60
+
+    if (hours > 0) {
+        return `${hours}h ${minutes}m ${seconds}s`
+    }
+
+    return `${minutes}m ${seconds}s`
+}
+
 export async function handleStatsCommand(ctx: StatsCommandContext): Promise<void> {
     const { client, state, logger, sessionId, messages } = ctx
 
     // Session stats from in-memory state
     const sessionTokens = state.stats.totalPruneTokens
+    const sessionSummaryTokens = Array.from(state.prune.messages.blocksById.values()).reduce(
+        (total, block) => (block.active ? total + block.summaryTokens : total),
+        0,
+    )
+    const sessionDurationMs = getActiveCompressionTargets(state.prune.messages).reduce(
+        (total, target) => total + target.durationMs,
+        0,
+    )
 
     const prunedToolIds = new Set<string>(state.prune.tools.keys())
     for (const block of state.prune.messages.blocksById.values()) {
@@ -72,15 +123,24 @@ export async function handleStatsCommand(ctx: StatsCommandContext): Promise<void
     // All-time stats from storage files
     const allTime = await loadAllSessionStats(logger)
 
-    const message = formatStatsMessage(sessionTokens, sessionTools, sessionMessages, allTime)
+    const message = formatStatsMessage(
+        sessionTokens,
+        sessionSummaryTokens,
+        sessionTools,
+        sessionMessages,
+        sessionDurationMs,
+        allTime,
+    )
 
     const params = getCurrentParams(state, messages, logger)
     await sendIgnoredMessage(client, sessionId, message, params, logger)
 
     logger.info("Stats command executed", {
         sessionTokens,
+        sessionSummaryTokens,
         sessionTools,
         sessionMessages,
+        sessionDurationMs,
         allTimeTokens: allTime.totalTokens,
         allTimeTools: allTime.totalTools,
         allTimeMessages: allTime.totalMessages,

lib/compress/message.ts

@@ -48,6 +48,10 @@ export function createCompressMessageTool(ctx: ToolContext): ReturnType<typeof t
         async execute(args, toolCtx) {
             const input = args as CompressMessageToolArgs
             validateArgs(input)
+            const callId =
+                typeof (toolCtx as unknown as { callID?: unknown }).callID === "string"
+                    ? (toolCtx as unknown as { callID: string }).callID
+                    : undefined
 
             const { rawMessages, searchContext } = await prepareSession(
                 ctx,
@@ -107,6 +111,7 @@ export function createCompressMessageTool(ctx: ToolContext): ReturnType<typeof t
                         mode: "message",
                         runId,
                         compressMessageId: toolCtx.messageID,
+                        compressCallId: callId,
                         summaryTokens,
                     },
                     plan.selection,

lib/compress/pipeline.ts

@@ -9,6 +9,7 @@ import { sendCompressNotification } from "../ui/notification"
 import type { ToolContext } from "./types"
 import { buildSearchContext, fetchSessionMessages } from "./search"
 import type { SearchContext } from "./types"
+import { applyPendingCompressionDurations } from "./timing"
 
 interface RunContext {
     ask(input: {
@@ -83,6 +84,7 @@ export async function finalizeSession(
     batchTopic: string | undefined,
 ): Promise<void> {
     ctx.state.manualMode = ctx.state.manualMode ? "active" : false
+    applyPendingCompressionDurations(ctx.state)
     await saveSessionState(ctx.state, ctx.logger)
 
     const params = getCurrentParams(ctx.state, rawMessages, ctx.logger)

lib/compress/range.ts

@@ -59,6 +59,10 @@ export function createCompressRangeTool(ctx: ToolContext): ReturnType<typeof too
         async execute(args, toolCtx) {
             const input = args as CompressRangeToolArgs
             validateArgs(input)
+            const callId =
+                typeof (toolCtx as unknown as { callID?: unknown }).callID === "string"
+                    ? (toolCtx as unknown as { callID: string }).callID
+                    : undefined
 
             const { rawMessages, searchContext } = await prepareSession(
                 ctx,
@@ -148,6 +152,7 @@ export function createCompressRangeTool(ctx: ToolContext): ReturnType<typeof too
                         mode: "range",
                         runId,
                         compressMessageId: toolCtx.messageID,
+                        compressCallId: callId,
                         summaryTokens,
                     },
                     preparedPlan.selection,

lib/compress/state.ts

@@ -1,4 +1,4 @@
-import type { CompressionBlock, SessionState } from "../state"
+import type { CompressionBlock, PruneMessagesState, SessionState } from "../state"
 import { formatBlockRef, formatMessageIdTag } from "../message-ids"
 import type { AppliedCompressionResult, CompressionStateInput, SelectionResolution } from "./types"
 
@@ -26,6 +26,28 @@ export function allocateRunId(state: SessionState): number {
     return next
 }
 
+export function attachCompressionDuration(
+    messagesState: PruneMessagesState,
+    callId: string,
+    durationMs: number,
+): number {
+    if (typeof durationMs !== "number" || !Number.isFinite(durationMs)) {
+        return 0
+    }
+
+    let updates = 0
+    for (const block of messagesState.blocksById.values()) {
+        if (block.compressCallId !== callId) {
+            continue
+        }
+
+        block.durationMs = durationMs
+        updates++
+    }
+
+    return updates
+}
+
 export function wrapCompressedSummary(blockId: number, summary: string): string {
     const header = COMPRESSED_BLOCK_HEADER
     const footer = formatMessageIdTag(formatBlockRef(blockId))
@@ -93,13 +115,15 @@ export function applyCompressionState(
         deactivatedByUser: false,
         compressedTokens: 0,
         summaryTokens: input.summaryTokens,
+        durationMs: 0,
         mode: input.mode,
         topic: input.topic,
         batchTopic: input.batchTopic,
         startId: input.startId,
         endId: input.endId,
         anchorMessageId,
         compressMessageId: input.compressMessageId,
+        compressCallId: input.compressCallId,
         includedBlockIds: included,
         consumedBlockIds: consumed,
         parentBlockIds: [],

lib/compress/timing.ts

@@ -0,0 +1,66 @@
+import type { SessionState } from "../state/types"
+import { attachCompressionDuration } from "./state"
+
+export interface PendingCompressionDuration {
+    callId: string
+    durationMs: number
+}
+
+export interface CompressionTimingState {
+    startsByCallId: Map<string, number>
+    pendingByCallId: Map<string, PendingCompressionDuration>
+}
+
+export function consumeCompressionStart(state: SessionState, callId: string): number | undefined {
+    const start = state.compressionTiming.startsByCallId.get(callId)
+    state.compressionTiming.startsByCallId.delete(callId)
+    return start
+}
+
+export function resolveCompressionDuration(
+    startedAt: number | undefined,
+    eventTime: number | undefined,
+    partTime: { start?: unknown; end?: unknown } | undefined,
+): number | undefined {
+    const runningAt =
+        typeof partTime?.start === "number" && Number.isFinite(partTime.start)
+            ? partTime.start
+            : eventTime
+    const pendingToRunningMs =
+        typeof startedAt === "number" && typeof runningAt === "number"
+            ? Math.max(0, runningAt - startedAt)
+            : undefined
+
+    const toolStart = partTime?.start
+    const toolEnd = partTime?.end
+    const runtimeMs =
+        typeof toolStart === "number" &&
+        Number.isFinite(toolStart) &&
+        typeof toolEnd === "number" &&
+        Number.isFinite(toolEnd)
+            ? Math.max(0, toolEnd - toolStart)
+            : undefined
+
+    return typeof pendingToRunningMs === "number" ? pendingToRunningMs : runtimeMs
+}
+
+export function applyPendingCompressionDurations(state: SessionState): number {
+    if (state.compressionTiming.pendingByCallId.size === 0) {
+        return 0
+    }
+
+    let updates = 0
+    for (const [callId, entry] of state.compressionTiming.pendingByCallId) {
+        const applied = attachCompressionDuration(
+            state.prune.messages,
+            entry.callId,
+            entry.durationMs,
+        )
+        if (applied > 0) {
+            updates += applied
+            state.compressionTiming.pendingByCallId.delete(callId)
+        }
+    }
+
+    return updates
+}

lib/compress/types.ts

@@ -103,5 +103,6 @@ export interface CompressionStateInput {
     mode: CompressionMode
     runId: number
     compressMessageId: string
+    compressCallId?: string
     summaryTokens: number
 }