cleanup: don't search reasoning parts for compress strings

Author: Tarquinen

lib/prompts/compress.md

@@ -79,6 +79,7 @@ WHERE TO NEVER PICK STRINGS FROM:
 
 - `<system-reminder>` tags or any XML wrapper/meta-commentary around messages
 - Injected system instructions (plan mode text, max-steps warnings, mode-switch text, environment info)
+- Reasoning parts or chain-of-thought text
 - File/directory listing framing text (e.g. "Called the Read tool with the following input...")
 - Strings that span across message or part boundaries
 - Entire serialized JSON objects (key ordering may differ - pick a distinctive substring within instead)

lib/tools/utils.ts

@@ -44,7 +44,7 @@ export function findSummaryAnchorForBoundary(
 
         throw new Error(
             `Found multiple matches for ${stringType}. ` +
-                `Provide more surrounding context to uniquely identify the intended match.`,
+            `Provide more surrounding context to uniquely identify the intended match.`,
         )
     }
 
@@ -79,7 +79,6 @@ function extractMessageContent(msg: WithParts): string {
 
         switch (part.type) {
             case "text":
-            case "reasoning":
                 if (typeof p.text === "string") {
                     content += " " + p.text
                 }
@@ -225,7 +224,7 @@ export function findStringInMessages(
         })
         throw new Error(
             `Found multiple matches for ${stringType}. ` +
-                `Provide more surrounding context to uniquely identify the intended match.`,
+            `Provide more surrounding context to uniquely identify the intended match.`,
         )
     }
 
@@ -274,7 +273,7 @@ export function findStringInMessages(
         })
         throw new Error(
             `${stringType} not found in conversation. ` +
-                `Make sure the string exists and is spelled exactly as it appears.`,
+            `Make sure the string exists and is spelled exactly as it appears.`,
         )
     }
 
@@ -302,7 +301,7 @@ export function findStringInMessages(
         })
         throw new Error(
             `Found multiple matches for ${stringType}. ` +
-                `Provide more unique surrounding context to disambiguate.`,
+            `Provide more unique surrounding context to disambiguate.`,
         )
     }