fix: address Cubic round-2 P2 issues

- target-token-truncation: eliminate redundant SDK messages fetch by
  extracting tool results from already-fetched toolPartsByKey map
- recover-thinking-block-order: wrap SDK message fetches in try/catch
  so recovery continues gracefully on API errors
- thinking-strip: guard against missing part.id before calling
  deletePart to prevent invalid HTTP requests

src/hooks/anthropic-context-window-limit-recovery/target-token-truncation.ts

@@ -1,7 +1,7 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import type { AggressiveTruncateResult } from "./tool-part-types"
 import { findToolResultsBySize, truncateToolResult } from "./tool-result-storage"
-import { findToolResultsBySizeFromSDK, truncateToolResultAsync } from "./tool-result-storage-sdk"
+import { truncateToolResultAsync } from "./tool-result-storage-sdk"
 import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 
 type OpencodeClient = PluginInput["client"]
@@ -79,7 +79,19 @@ export async function truncateUntilTargetTokens(
 			toolPartsByKey = new Map<string, SDKToolPart>()
 		}
 
-		const results = await findToolResultsBySizeFromSDK(client, sessionID)
+		const results: import("./tool-part-types").ToolResultInfo[] = []
+		for (const [key, part] of toolPartsByKey) {
+			if (part.type === "tool" && part.state?.output && !part.truncated && part.tool) {
+				results.push({
+					partPath: "",
+					partId: part.id,
+					messageID: key.split(":")[0],
+					toolName: part.tool,
+					outputSize: part.state.output.length,
+				})
+			}
+		}
+		results.sort((a, b) => b.outputSize - a.outputSize)
 
 		if (results.length === 0) {
 			return {

src/hooks/session-recovery/recover-thinking-block-order.ts

@@ -74,8 +74,13 @@ async function findMessagesWithOrphanThinkingFromSDK(
   client: Client,
   sessionID: string
 ): Promise<string[]> {
+  let messages: MessageData[]
+  try {
     const response = await client.session.messages({ path: { id: sessionID } })
-  const messages = (response.data ?? []) as MessageData[]
+    messages = (response.data ?? []) as MessageData[]
+  } catch {
+    return []
+  }
 
   const result: string[] = []
   for (const msg of messages) {
@@ -103,8 +108,13 @@ async function findMessageByIndexNeedingThinkingFromSDK(
   sessionID: string,
   targetIndex: number
 ): Promise<string | null> {
+  let messages: MessageData[]
+  try {
     const response = await client.session.messages({ path: { id: sessionID } })
-  const messages = (response.data ?? []) as MessageData[]
+    messages = (response.data ?? []) as MessageData[]
+  } catch {
+    return null
+  }
 
   if (targetIndex < 0 || targetIndex >= messages.length) return null
 

src/hooks/session-recovery/storage/thinking-strip.ts

@@ -52,7 +52,7 @@ export async function stripThinkingPartsAsync(
 
     let anyRemoved = false
     for (const part of targetMsg.parts) {
-      if (THINKING_TYPES.has(part.type)) {
+      if (THINKING_TYPES.has(part.type) && part.id) {
         const deleted = await deletePart(client, sessionID, messageID, part.id)
         if (deleted) anyRemoved = true
       }