fix: properly reset nudge counter after prune tool is used

The nudge counter now correctly resets to zero when prune is used and
only counts tools invoked since the last prune. Previously, the counter
could become inaccurate across session reloads. Also increased tool
cache size to 1000.

Author: Tarquinen

lib/state/tool-cache.ts

@@ -2,7 +2,7 @@ import type { SessionState, ToolStatus, WithParts } from "./index"
 import type { Logger } from "../logger"
 import { PluginConfig } from "../config"
 
-const MAX_TOOL_CACHE_SIZE = 500
+const MAX_TOOL_CACHE_SIZE = 1000
 
 /**
  * Sync tool parameters from OpenCode's session.messages() API.
@@ -16,13 +16,24 @@ export async function syncToolCache(
     try {
         logger.info("Syncing tool parameters from OpenCode messages")
 
+        state.nudgeCounter = 0
+
         for (const msg of messages) {
             for (const part of msg.parts) {
-                if (part.type !== "tool" || !part.callID || state.toolParameters.has(part.callID)) {
+                if (part.type !== "tool" || !part.callID) {
                     continue
                 }
 
-                const alreadyPruned = state.prune.toolIds.includes(part.callID)
+                if (part.tool === "prune") {
+                    state.nudgeCounter = 0
+                } else if (!config.strategies.pruneTool.protectedTools.includes(part.tool)) {
+                    state.nudgeCounter++
+                }
+                state.lastToolPrune = part.tool === "prune"
+
+                if (state.toolParameters.has(part.callID)) {
+                    continue
+                }
 
                 state.toolParameters.set(
                     part.callID,
@@ -34,16 +45,11 @@ export async function syncToolCache(
                         compacted: part.state.status === "completed" && !!part.state.time.compacted,
                     }
                 )
-
-                if (!alreadyPruned && !config.strategies.pruneTool.protectedTools.includes(part.tool)) {
-                    state.nudgeCounter++
-                }
-
-                state.lastToolPrune = part.tool === "prune"
-                logger.info("lastToolPrune=" + String(state.lastToolPrune))
             }
         }
 
+        // logger.info(`nudgeCounter=${state.nudgeCounter}, lastToolPrune=${state.lastToolPrune}`)
+
         trimToolParametersCache(state)
     } catch (error) {
         logger.warn("Failed to sync tool parameters from OpenCode", {