diff --git a/packages/coding-agent/src/tools/ast-edit.ts b/packages/coding-agent/src/tools/ast-edit.ts
index 3b07b64fa..2e2ebb8cc 100644
--- a/packages/coding-agent/src/tools/ast-edit.ts
+++ b/packages/coding-agent/src/tools/ast-edit.ts
@@ -5,7 +5,7 @@ import type { Component } from "@oh-my-pi/pi-tui";
 import { Text } from "@oh-my-pi/pi-tui";
 import { $envpos, prompt, untilAborted } from "@oh-my-pi/pi-utils";
 import { type Static, Type } from "@sinclair/typebox";
-import { computeLineHash } from "../edit/line-hash";
+import { computeLineHash, HASHLINE_CONTENT_SEPARATOR } from "../edit/line-hash";
 import type { RenderResultOptions } from "../extensibility/custom-tools/types";
 import type { Theme } from "../modes/theme/theme";
 import astEditDescription from "../prompts/tools/ast-edit.md" with { type: "text" };
@@ -72,7 +72,7 @@ export class AstEditTool implements AgentTool<typeof astEditSchema, AstEditToolD
 	readonly label = "AST Edit";
 	readonly description: string;
 	readonly parameters = astEditSchema;
-	readonly strict = true;
+	readonly strict = false;
 	readonly deferrable = true;
 	constructor(private readonly session: ToolSession) {
 		this.description = prompt.render(astEditDescription);
@@ -221,7 +221,7 @@ export class AstEditTool implements AgentTool<typeof astEditSchema, AstEditToolD
 					const afterRef = useHashLines
 						? `${change.startLine}${computeLineHash(change.startLine, afterFirstLine)}`
 						: `${change.startLine}:${change.startColumn}`;
-					const lineSeparator = useHashLines ? "\t" : " ";
+					const lineSeparator = useHashLines ? HASHLINE_CONTENT_SEPARATOR : " ";
 					outputLines.push(`-${beforeRef}${lineSeparator}${beforeLine}`);
 					outputLines.push(`+${afterRef}${lineSeparator}${afterLine}`);
 					displayLines.push(formatCodeFrameLine("-", change.startLine, beforeLine, lineNumberWidth));
diff --git a/packages/coding-agent/src/tools/ast-grep.ts b/packages/coding-agent/src/tools/ast-grep.ts
index 6bdfc8046..05fdd7109 100644
--- a/packages/coding-agent/src/tools/ast-grep.ts
+++ b/packages/coding-agent/src/tools/ast-grep.ts
@@ -63,7 +63,7 @@ export class AstGrepTool implements AgentTool<typeof astGrepSchema, AstGrepToolD
 	readonly label = "AST Grep";
 	readonly description: string;
 	readonly parameters = astGrepSchema;
-	readonly strict = true;
+	readonly strict = false;
 
 	constructor(private readonly session: ToolSession) {
 		this.description = prompt.render(astGrepDescription);