From d414f6daba5b656ae66633821137dea91d3b0619 Mon Sep 17 00:00:00 2001
From: YeonGyu-Kim <code.yeon.gyu@gmail.com>
Date: Sun, 15 Feb 2026 14:50:32 +0900
Subject: [PATCH] fix: add explicit isSqliteBackend guards to pruning modules

---
 .../pruning-deduplication.ts                               | 7 +++++++
 .../pruning-tool-output-truncation.ts                      | 6 ++++++
 2 files changed, 13 insertions(+)

diff --git a/src/hooks/anthropic-context-window-limit-recovery/pruning-deduplication.ts b/src/hooks/anthropic-context-window-limit-recovery/pruning-deduplication.ts
index 1598052c3..45e69bdae 100644
--- a/src/hooks/anthropic-context-window-limit-recovery/pruning-deduplication.ts
+++ b/src/hooks/anthropic-context-window-limit-recovery/pruning-deduplication.ts
@@ -4,6 +4,7 @@ import type { PruningState, ToolCallSignature } from "./pruning-types"
 import { estimateTokens } from "./pruning-types"
 import { log } from "../../shared/logger"
 import { getMessageDir } from "../../shared/opencode-message-dir"
+import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 
 export interface DeduplicationConfig {
   enabled: boolean
@@ -44,6 +45,7 @@ function sortObject(obj: unknown): unknown {
 }
 
 function readMessages(sessionID: string): MessagePart[] {
+  if (isSqliteBackend()) return []
   const messageDir = getMessageDir(sessionID)
   if (!messageDir) return []
 
@@ -71,6 +73,11 @@ export function executeDeduplication(
   config: DeduplicationConfig,
   protectedTools: Set<string>
 ): number {
+  if (isSqliteBackend()) {
+    log("[pruning-deduplication] Skipping deduplication on SQLite backend")
+    return 0
+  }
+
   if (!config.enabled) return 0
 
   const messages = readMessages(sessionID)
diff --git a/src/hooks/anthropic-context-window-limit-recovery/pruning-tool-output-truncation.ts b/src/hooks/anthropic-context-window-limit-recovery/pruning-tool-output-truncation.ts
index e92946335..b1fe9b333 100644
--- a/src/hooks/anthropic-context-window-limit-recovery/pruning-tool-output-truncation.ts
+++ b/src/hooks/anthropic-context-window-limit-recovery/pruning-tool-output-truncation.ts
@@ -4,6 +4,7 @@ import { getOpenCodeStorageDir } from "../../shared/data-path"
 import { truncateToolResult } from "./storage"
 import { log } from "../../shared/logger"
 import { getMessageDir } from "../../shared/opencode-message-dir"
+import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 
 interface StoredToolPart {
   type?: string
@@ -39,6 +40,11 @@ export function truncateToolOutputsByCallId(
   sessionID: string,
   callIds: Set<string>,
 ): { truncatedCount: number } {
+  if (isSqliteBackend()) {
+    log("[auto-compact] Skipping pruning tool outputs on SQLite backend")
+    return { truncatedCount: 0 }
+  }
+
   if (callIds.size === 0) return { truncatedCount: 0 }
 
   const messageIds = getMessageIds(sessionID)