diff --git a/src/core/task/__tests__/appendEnvironmentDetails.spec.ts b/src/core/task/__tests__/appendEnvironmentDetails.spec.ts
index 54ccb1ee1e..590d4ab5a0 100644
--- a/src/core/task/__tests__/appendEnvironmentDetails.spec.ts
+++ b/src/core/task/__tests__/appendEnvironmentDetails.spec.ts
@@ -1,10 +1,5 @@
 import { Anthropic } from "@anthropic-ai/sdk"
-import {
-	appendEnvironmentDetails,
-	removeEnvironmentDetailsBlocks,
-	stripAppendedEnvironmentDetails,
-	UserContentBlock,
-} from "../appendEnvironmentDetails"
+import { appendEnvironmentDetails, removeEnvironmentDetailsBlocks, UserContentBlock } from "../appendEnvironmentDetails"
 
 describe("appendEnvironmentDetails", () => {
 	const envDetails = "<environment_details>\n# Test\nSome details\n</environment_details>"
@@ -319,96 +314,3 @@ describe("removeEnvironmentDetailsBlocks", () => {
 		expect(result).toHaveLength(0)
 	})
 })
-
-describe("stripAppendedEnvironmentDetails", () => {
-	const envDetails = "<environment_details>\n# Test\nSome details\n</environment_details>"
-
-	it("should strip environment details from the end of a text block", () => {
-		const content: UserContentBlock[] = [{ type: "text", text: "User message\n\n" + envDetails }]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		expect(result).toHaveLength(1)
-		expect((result[0] as Anthropic.Messages.TextBlockParam).text).toBe("User message")
-	})
-
-	it("should strip environment details from tool_result string content", () => {
-		const content: UserContentBlock[] = [
-			{
-				type: "tool_result",
-				tool_use_id: "tool-123",
-				content: "Tool result\n\n" + envDetails,
-			},
-		]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		expect(result).toHaveLength(1)
-		expect((result[0] as Anthropic.Messages.ToolResultBlockParam).content).toBe("Tool result")
-	})
-
-	it("should strip environment details from tool_result array content", () => {
-		const content: UserContentBlock[] = [
-			{
-				type: "tool_result",
-				tool_use_id: "tool-123",
-				content: [{ type: "text", text: "Result text\n\n" + envDetails }],
-			},
-		]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		const toolResult = result[0] as Anthropic.Messages.ToolResultBlockParam
-		const contentArray = toolResult.content as Anthropic.Messages.TextBlockParam[]
-		expect(contentArray[0].text).toBe("Result text")
-	})
-
-	it("should also remove standalone environment_details blocks", () => {
-		const content: UserContentBlock[] = [
-			{ type: "text", text: "User message" },
-			{ type: "text", text: envDetails },
-		]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		expect(result).toHaveLength(1)
-		expect((result[0] as Anthropic.Messages.TextBlockParam).text).toBe("User message")
-	})
-
-	it("should handle content without environment details", () => {
-		const content: UserContentBlock[] = [
-			{ type: "text", text: "User message" },
-			{
-				type: "tool_result",
-				tool_use_id: "tool-123",
-				content: "Tool result",
-			},
-		]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		expect(result).toEqual(content)
-	})
-
-	it("should handle empty content", () => {
-		const result = stripAppendedEnvironmentDetails([])
-		expect(result).toHaveLength(0)
-	})
-
-	it("should preserve is_error flag when stripping from tool_result", () => {
-		const content: UserContentBlock[] = [
-			{
-				type: "tool_result",
-				tool_use_id: "tool-123",
-				content: "Error\n\n" + envDetails,
-				is_error: true,
-			},
-		]
-
-		const result = stripAppendedEnvironmentDetails(content)
-
-		const toolResult = result[0] as Anthropic.Messages.ToolResultBlockParam
-		expect(toolResult.is_error).toBe(true)
-		expect(toolResult.content).toBe("Error")
-	})
-})
diff --git a/src/core/task/appendEnvironmentDetails.ts b/src/core/task/appendEnvironmentDetails.ts
index 09495d89e7..5e21347788 100644
--- a/src/core/task/appendEnvironmentDetails.ts
+++ b/src/core/task/appendEnvironmentDetails.ts
@@ -143,96 +143,3 @@ export function removeEnvironmentDetailsBlocks(content: UserContentBlock[]): Use
 		return true
 	})
 }
-
-/**
- * Strips environment details from the last text block or tool_result in the content.
- * This handles the case where environment details were appended to an existing block
- * rather than added as a standalone block.
- *
- * @param content - Array of content blocks
- * @returns New array with environment details stripped from the last suitable block
- */
-export function stripAppendedEnvironmentDetails(content: UserContentBlock[]): UserContentBlock[] {
-	if (content.length === 0) {
-		return content
-	}
-
-	// First, remove any standalone environment_details blocks
-	let result = removeEnvironmentDetailsBlocks(content)
-
-	if (result.length === 0) {
-		return result
-	}
-
-	// Then, strip appended environment details from the last block
-	const lastIndex = result.length - 1
-	const lastBlock = result[lastIndex]
-
-	if (lastBlock.type === "text") {
-		const strippedText = stripEnvDetailsFromText(lastBlock.text)
-		if (strippedText !== lastBlock.text) {
-			result = [...result]
-			result[lastIndex] = { type: "text" as const, text: strippedText }
-		}
-	} else if (lastBlock.type === "tool_result") {
-		const strippedToolResult = stripEnvDetailsFromToolResult(lastBlock)
-		if (strippedToolResult !== lastBlock) {
-			result = [...result]
-			result[lastIndex] = strippedToolResult
-		}
-	}
-
-	return result
-}
-
-/**
- * Strips environment details from the end of a text string.
- */
-function stripEnvDetailsFromText(text: string): string {
-	// Match environment details at the end of the string, with optional preceding newlines
-	const envDetailsPattern = /\n*<environment_details>[\s\S]*<\/environment_details>\s*$/
-	return text.replace(envDetailsPattern, "")
-}
-
-/**
- * Strips environment details from a tool_result block's content.
- */
-function stripEnvDetailsFromToolResult(
-	toolResult: Anthropic.Messages.ToolResultBlockParam,
-): Anthropic.Messages.ToolResultBlockParam {
-	const { content, ...rest } = toolResult
-
-	if (content === undefined || content === null) {
-		return toolResult
-	}
-
-	if (typeof content === "string") {
-		const strippedContent = stripEnvDetailsFromText(content)
-		if (strippedContent === content) {
-			return toolResult
-		}
-		return { ...rest, content: strippedContent }
-	}
-
-	if (Array.isArray(content)) {
-		let changed = false
-		const newContent = content.map((block) => {
-			if (block.type === "text") {
-				const strippedText = stripEnvDetailsFromText(block.text)
-				if (strippedText !== block.text) {
-					changed = true
-					return { type: "text" as const, text: strippedText }
-				}
-			}
-			return block
-		})
-
-		if (!changed) {
-			return toolResult
-		}
-
-		return { ...rest, content: newContent }
-	}
-
-	return toolResult
-}