diff --git a/lib/messages/prune.ts b/lib/messages/prune.ts
index 7361b74..f556a9e 100644
--- a/lib/messages/prune.ts
+++ b/lib/messages/prune.ts
@@ -1,8 +1,10 @@
 import type { SessionState, WithParts } from "../state"
 import type { Logger } from "../logger"
 import type { PluginConfig } from "../config"
-import { getLastUserMessage, extractParameterKey, buildToolIdList } from "./utils"
 import { loadPrompt } from "../prompt"
+import { extractParameterKey, buildToolIdList } from "./utils"
+import { getLastUserMessage } from "../shared-utils"
+import { UserMessage } from "@opencode-ai/sdk"
 
 const PRUNED_TOOL_OUTPUT_REPLACEMENT = '[Output removed to save context - information superseded or no longer needed]'
 const NUDGE_STRING = loadPrompt("nudge")
@@ -51,7 +53,7 @@ export const insertPruneToolContext = (
     }
 
     const lastUserMessage = getLastUserMessage(messages)
-    if (!lastUserMessage || lastUserMessage.info.role !== 'user') {
+    if (!lastUserMessage) {
         return
     }
 
@@ -72,10 +74,10 @@ export const insertPruneToolContext = (
             sessionID: lastUserMessage.info.sessionID,
             role: "user",
             time: { created: Date.now() },
-            agent: lastUserMessage.info.agent || "build",
+            agent: (lastUserMessage.info as UserMessage).agent || "build",
             model: {
-                providerID: lastUserMessage.info.model.providerID,
-                modelID: lastUserMessage.info.model.modelID
+                providerID: (lastUserMessage.info as UserMessage).model.providerID,
+                modelID: (lastUserMessage.info as UserMessage).model.modelID
             }
         },
         parts: [
@@ -118,9 +120,6 @@ const pruneToolOutputs = (
             if (part.state.status === 'completed') {
                 part.state.output = PRUNED_TOOL_OUTPUT_REPLACEMENT
             }
-            // if (part.state.status === 'error') {
-            //     part.state.error = PRUNED_TOOL_OUTPUT_REPLACEMENT
-            // }
         }
     }
 }
diff --git a/lib/messages/utils.ts b/lib/messages/utils.ts
index 9638e74..1ae2c7d 100644
--- a/lib/messages/utils.ts
+++ b/lib/messages/utils.ts
@@ -1,5 +1,3 @@
-import { UserMessage } from "@opencode-ai/sdk"
-import { Logger } from "../logger"
 import type { WithParts } from "../state"
 
 /**
@@ -73,38 +71,6 @@ export const extractParameterKey = (tool: string, parameters: any): string => {
     return paramStr.substring(0, 50)
 }
 
-export const getLastUserMessage = (
-    messages: WithParts[]
-): WithParts | null => {
-    for (let i = messages.length - 1; i >= 0; i--) {
-        const msg = messages[i]
-        if (msg.info.role === 'user') {
-            return msg
-        }
-    }
-    return null
-}
-
-export function getCurrentParams(
-    messages: WithParts[],
-    logger: Logger
-): {
-    providerId: string | undefined,
-    modelId: string | undefined,
-    agent: string | undefined
-} {
-    const userMsg = getLastUserMessage(messages)
-    if (!userMsg) {
-        logger.debug("No user message found when determining current params")
-        return { providerId: undefined, modelId: undefined, agent: undefined }
-    }
-    const agent: string = (userMsg.info as UserMessage).agent
-    const providerId: string | undefined = (userMsg.info as UserMessage).model.providerID
-    const modelId: string | undefined = (userMsg.info as UserMessage).model.modelID
-
-    return { providerId, modelId, agent }
-}
-
 export function buildToolIdList(messages: WithParts[]): string[] {
     const toolIds: string[] = []
     for (const msg of messages) {
diff --git a/lib/shared-utils.ts b/lib/shared-utils.ts
new file mode 100644
index 0000000..cdcfb5b
--- /dev/null
+++ b/lib/shared-utils.ts
@@ -0,0 +1,13 @@
+import { WithParts } from "./state"
+
+export const getLastUserMessage = (
+    messages: WithParts[]
+): WithParts | null => {
+    for (let i = messages.length - 1; i >= 0; i--) {
+        const msg = messages[i]
+        if (msg.info.role === 'user') {
+            return msg
+        }
+    }
+    return null
+}
diff --git a/lib/state/state.ts b/lib/state/state.ts
index 91e3f92..19dc854 100644
--- a/lib/state/state.ts
+++ b/lib/state/state.ts
@@ -1,8 +1,8 @@
 import type { SessionState, ToolParameterEntry, WithParts } from "./types"
 import type { Logger } from "../logger"
 import { loadSessionState } from "./persistence"
-import { getLastUserMessage } from "../messages/utils"
-import { isSubAgentSession } from "../utils"
+import { isSubAgentSession } from "./utils"
+import { getLastUserMessage } from "../shared-utils"
 
 export const checkSession = async (
     client: any,
diff --git a/lib/state/utils.ts b/lib/state/utils.ts
new file mode 100644
index 0000000..4cc10ce
--- /dev/null
+++ b/lib/state/utils.ts
@@ -0,0 +1,8 @@
+export async function isSubAgentSession(client: any, sessionID: string): Promise<boolean> {
+    try {
+        const result = await client.session.get({ path: { id: sessionID } })
+        return !!result.data?.parentID
+    } catch (error: any) {
+        return false
+    }
+}
diff --git a/lib/strategies/deduplication.ts b/lib/strategies/deduplication.ts
index 61cc484..eaa9798 100644
--- a/lib/strategies/deduplication.ts
+++ b/lib/strategies/deduplication.ts
@@ -1,8 +1,8 @@
 import { PluginConfig } from "../config"
 import { Logger } from "../logger"
 import type { SessionState, WithParts } from "../state"
-import { calculateTokensSaved } from "../utils"
 import { buildToolIdList } from "../messages/utils"
+import { calculateTokensSaved } from "./utils"
 
 /**
  * Deduplication strategy - prunes older tool calls that have identical
diff --git a/lib/strategies/on-idle.ts b/lib/strategies/on-idle.ts
index 16698b3..50dbb2f 100644
--- a/lib/strategies/on-idle.ts
+++ b/lib/strategies/on-idle.ts
@@ -4,10 +4,9 @@ import type { Logger } from "../logger"
 import type { PluginConfig } from "../config"
 import { buildAnalysisPrompt } from "../prompt"
 import { selectModel, ModelInfo } from "../model-selector"
-import { calculateTokensSaved } from "../utils"
-import { getCurrentParams } from "../messages/utils"
 import { saveSessionState } from "../state/persistence"
 import { sendUnifiedNotification } from "../ui/notification"
+import { calculateTokensSaved, getCurrentParams } from "./utils"
 
 export interface OnIdleResult {
     prunedCount: number
diff --git a/lib/strategies/prune-tool.ts b/lib/strategies/prune-tool.ts
index 6807070..a83694f 100644
--- a/lib/strategies/prune-tool.ts
+++ b/lib/strategies/prune-tool.ts
@@ -1,14 +1,14 @@
 import { tool } from "@opencode-ai/plugin"
 import type { SessionState, ToolParameterEntry, WithParts } from "../state"
 import type { PluginConfig } from "../config"
-import { getCurrentParams, buildToolIdList } from "../messages/utils"
-import { calculateTokensSaved } from "../utils"
+import { buildToolIdList } from "../messages/utils"
 import { PruneReason, sendUnifiedNotification } from "../ui/notification"
-import { formatPruningResultForTool } from "../ui/display-utils"
+import { formatPruningResultForTool } from "../ui/utils"
 import { ensureSessionInitialized } from "../state"
 import { saveSessionState } from "../state/persistence"
 import type { Logger } from "../logger"
 import { loadPrompt } from "../prompt"
+import { calculateTokensSaved, getCurrentParams } from "./utils"
 
 /** Tool description loaded from prompts/tool.txt */
 const TOOL_DESCRIPTION = loadPrompt("tool")
diff --git a/lib/utils.ts b/lib/strategies/utils.ts
similarity index 66%
rename from lib/utils.ts
rename to lib/strategies/utils.ts
index 842b964..af18963 100644
--- a/lib/utils.ts
+++ b/lib/strategies/utils.ts
@@ -1,5 +1,28 @@
-import { WithParts } from "./state"
+import { WithParts } from "../state"
+import { UserMessage } from "@opencode-ai/sdk"
+import { Logger } from "../logger"
 import { encode } from 'gpt-tokenizer'
+import { getLastUserMessage } from "../shared-utils"
+
+export function getCurrentParams(
+    messages: WithParts[],
+    logger: Logger
+): {
+    providerId: string | undefined,
+    modelId: string | undefined,
+    agent: string | undefined
+} {
+    const userMsg = getLastUserMessage(messages)
+    if (!userMsg) {
+        logger.debug("No user message found when determining current params")
+        return { providerId: undefined, modelId: undefined, agent: undefined }
+    }
+    const agent: string = (userMsg.info as UserMessage).agent
+    const providerId: string | undefined = (userMsg.info as UserMessage).model.providerID
+    const modelId: string | undefined = (userMsg.info as UserMessage).model.modelID
+
+    return { providerId, modelId, agent }
+}
 
 /**
  * Estimates token counts for a batch of texts using gpt-tokenizer.
@@ -47,19 +70,3 @@ export const calculateTokensSaved = (
         return 0
     }
 }
-
-export function formatTokenCount(tokens: number): string {
-    if (tokens >= 1000) {
-        return `${(tokens / 1000).toFixed(1)}K`.replace('.0K', 'K') + ' tokens'
-    }
-    return tokens.toString() + ' tokens'
-}
-
-export async function isSubAgentSession(client: any, sessionID: string): Promise<boolean> {
-    try {
-        const result = await client.session.get({ path: { id: sessionID } })
-        return !!result.data?.parentID
-    } catch (error: any) {
-        return false
-    }
-}
diff --git a/lib/ui/notification.ts b/lib/ui/notification.ts
index 00ad378..ead50ac 100644
--- a/lib/ui/notification.ts
+++ b/lib/ui/notification.ts
@@ -1,7 +1,6 @@
 import type { Logger } from "../logger"
 import type { SessionState } from "../state"
-import { formatTokenCount } from "../utils"
-import { formatPrunedItemsList } from "./display-utils"
+import { formatPrunedItemsList, formatTokenCount } from "./utils"
 import { ToolParameterEntry } from "../state"
 import { PluginConfig } from "../config"
 
diff --git a/lib/ui/display-utils.ts b/lib/ui/utils.ts
similarity index 92%
rename from lib/ui/display-utils.ts
rename to lib/ui/utils.ts
index deb23a3..11335fa 100644
--- a/lib/ui/display-utils.ts
+++ b/lib/ui/utils.ts
@@ -1,6 +1,13 @@
 import { ToolParameterEntry } from "../state"
 import { extractParameterKey } from "../messages/utils"
 
+export function formatTokenCount(tokens: number): string {
+    if (tokens >= 1000) {
+        return `${(tokens / 1000).toFixed(1)}K`.replace('.0K', 'K') + ' tokens'
+    }
+    return tokens.toString() + ' tokens'
+}
+
 export function truncate(str: string, maxLen: number = 60): string {
     if (str.length <= maxLen) return str
     return str.slice(0, maxLen - 3) + '...'