chore: improve console message format

src/McpResponse.ts

@@ -444,7 +444,6 @@ Call ${handleDialog.name} to handle it before continuing.`);
       return response;
     }
 
-    response.push(`## Console Message ${data.consoleMessageStableId}`);
     response.push(formatConsoleEventVerbose(data));
     return response;
   }

src/formatters/consoleFormatter.ts

@@ -6,64 +6,49 @@
 
 import type {ConsoleMessageData} from '../McpResponse.js';
 
-const logLevels: Record<string, string> = {
-  log: 'Log',
-  info: 'Info',
-  warning: 'Warning',
-  error: 'Error',
-  exception: 'Exception',
-  assert: 'Assert',
-};
-
 // The short format for a console message, based on a previous format.
 export function formatConsoleEventShort(msg: ConsoleMessageData): string {
-  const args = msg.args ? formatArgs(msg, false) : '';
-  return `msgid=${msg.consoleMessageStableId} [${msg.type}] ${msg.message}${args}`;
+  return `msgid=${msg.consoleMessageStableId} [${msg.type}] ${msg.message} (${msg.args?.length ?? 0} args)`;
 }
 
-// The verbose format for a console message, including all details.
-export function formatConsoleEventVerbose(msg: ConsoleMessageData): string {
-  const logLevel = msg.type ? (logLevels[msg.type] ?? 'Log') : 'Log';
-  let result = `${logLevel}> ${msg.message}`;
+function getArgs(msg: ConsoleMessageData) {
+  const args = [...(msg.args ?? [])];
 
-  if (msg.args && msg.args.length > 0) {
-    result += formatArgs(msg, true);
+  // If there is no text, the first argument serves as text (see formatMessage).
+  if (!msg.message) {
+    args.shift();
   }
 
-  result += `
-  ID: ${msg.consoleMessageStableId}`;
-  result += `
-  Type: ${msg.type}`;
+  return args;
+}
+
+// The verbose format for a console message, including all details.
+export function formatConsoleEventVerbose(msg: ConsoleMessageData): string {
+  const result = [
+    `ID: ${msg.consoleMessageStableId}`,
+    `Message: ${msg.type}> ${msg.message}`,
+    formatArgs(msg),
+  ];
+
+  return result.join('\n');
+}
 
-  return result;
+function formatArg(arg: unknown) {
+  return typeof arg === 'object' ? JSON.stringify(arg) : String(arg);
 }
 
-// If `includeAllArgs` is false, only includes the first arg and indicates that there are more args.
-function formatArgs(
-  consoleData: ConsoleMessageData,
-  includeAllArgs = false,
-): string {
-  if (!consoleData.args || consoleData.args.length === 0) {
+function formatArgs(consoleData: ConsoleMessageData): string {
+  const args = getArgs(consoleData);
+
+  if (!args.length) {
     return '';
   }
 
-  let formattedArgs = '';
-  // In the short format version, we only include the first arg.
-  const messageArgsToFormat = includeAllArgs
-    ? consoleData.args
-    : [consoleData.args[0]];
-
-  for (const arg of messageArgsToFormat) {
-    if (arg !== consoleData.message) {
-      formattedArgs += ' ';
-      formattedArgs +=
-        typeof arg === 'object' ? JSON.stringify(arg) : String(arg);
-    }
-  }
+  const result = ['### Arguments'];
 
-  if (!includeAllArgs && consoleData.args.length > 1) {
-    formattedArgs += ` ...`;
+  for (const [key, arg] of args.entries()) {
+    result.push(`Arg #${key}: ${formatArg(arg)}`);
   }
 
-  return formattedArgs.length > 0 ? ` Args:${formattedArgs}` : '';
+  return result.join('\n');
 }

tests/formatters/consoleFormatter.test.js.snapshot

@@ -0,0 +1,38 @@
+exports[`consoleFormatter > formatConsoleEventShort > formats a console.log message 1`] = `
+msgid=1 [log] Hello, world! (0 args)
+`;
+
+exports[`consoleFormatter > formatConsoleEventShort > formats a console.log message with multiple arguments 1`] = `
+msgid=3 [log] Processing file: (2 args)
+`;
+
+exports[`consoleFormatter > formatConsoleEventShort > formats a console.log message with one argument 1`] = `
+msgid=2 [log] Processing file: (1 args)
+`;
+
+exports[`consoleFormatter > formatConsoleEventVerbose > formats a console.error message 1`] = `
+ID: 4
+Message: error> Something went wrong
+
+`;
+
+exports[`consoleFormatter > formatConsoleEventVerbose > formats a console.log message 1`] = `
+ID: 1
+Message: log> Hello, world!
+
+`;
+
+exports[`consoleFormatter > formatConsoleEventVerbose > formats a console.log message with multiple arguments 1`] = `
+ID: 3
+Message: log> Processing file:
+### Arguments
+Arg #0: file.txt
+Arg #1: another file
+`;
+
+exports[`consoleFormatter > formatConsoleEventVerbose > formats a console.log message with one argument 1`] = `
+ID: 2
+Message: log> Processing file:
+### Arguments
+Arg #0: file.txt
+`;

tests/formatters/consoleFormatter.test.ts

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import assert from 'node:assert';
 import {describe, it} from 'node:test';
 
 import {
@@ -15,129 +14,82 @@ import type {ConsoleMessageData} from '../../src/McpResponse.js';
 
 describe('consoleFormatter', () => {
   describe('formatConsoleEventShort', () => {
-    it('formats a console.log message', () => {
+    it('formats a console.log message', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 1,
         type: 'log',
         message: 'Hello, world!',
         args: [],
       };
       const result = formatConsoleEventShort(message);
-      assert.equal(result, 'msgid=1 [log] Hello, world!');
+      t.assert.snapshot?.(result);
     });
 
-    it('formats a console.log message with one argument', () => {
+    it('formats a console.log message with one argument', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 2,
         type: 'log',
         message: 'Processing file:',
         args: ['file.txt'],
       };
       const result = formatConsoleEventShort(message);
-      assert.equal(result, 'msgid=2 [log] Processing file: Args: file.txt');
+      t.assert.snapshot?.(result);
     });
 
-    it('formats a console.log message with multiple arguments', () => {
+    it('formats a console.log message with multiple arguments', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 3,
         type: 'log',
         message: 'Processing file:',
         args: ['file.txt', 'another file'],
       };
       const result = formatConsoleEventShort(message);
-      assert.equal(result, 'msgid=3 [log] Processing file: Args: file.txt ...');
-    });
-
-    it('does not include args if message is the same as arg', () => {
-      const message: ConsoleMessageData = {
-        consoleMessageStableId: 4,
-        type: 'log',
-        message: 'Hello',
-        args: ['Hello'],
-      };
-      const result = formatConsoleEventShort(message);
-      assert.equal(result, 'msgid=4 [log] Hello');
+      t.assert.snapshot?.(result);
     });
   });
 
   describe('formatConsoleEventVerbose', () => {
-    it('formats a console.log message', () => {
+    it('formats a console.log message', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 1,
         type: 'log',
         message: 'Hello, world!',
         args: [],
       };
       const result = formatConsoleEventVerbose(message);
-      assert.equal(
-        result,
-        `Log> Hello, world!
-  ID: 1
-  Type: log`,
-      );
+      t.assert.snapshot?.(result);
     });
 
-    it('formats a console.log message with one argument', () => {
+    it('formats a console.log message with one argument', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 2,
         type: 'log',
         message: 'Processing file:',
         args: ['file.txt'],
       };
       const result = formatConsoleEventVerbose(message);
-      assert.equal(
-        result,
-        `Log> Processing file: Args: file.txt
-  ID: 2
-  Type: log`,
-      );
+      t.assert.snapshot?.(result);
     });
 
-    it('formats a console.log message with multiple arguments', () => {
+    it('formats a console.log message with multiple arguments', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 3,
         type: 'log',
         message: 'Processing file:',
         args: ['file.txt', 'another file'],
       };
       const result = formatConsoleEventVerbose(message);
-      assert.equal(
-        result,
-        `Log> Processing file: Args: file.txt another file
-  ID: 3
-  Type: log`,
-      );
+      t.assert.snapshot?.(result);
     });
 
-    it('formats a console.error message', () => {
+    it('formats a console.error message', t => {
       const message: ConsoleMessageData = {
         consoleMessageStableId: 4,
         type: 'error',
         message: 'Something went wrong',
       };
       const result = formatConsoleEventVerbose(message);
-      assert.equal(
-        result,
-        `Error> Something went wrong
-  ID: 4
-  Type: error`,
-      );
-    });
-
-    it('does not include args if message is the same as arg', () => {
-      const message: ConsoleMessageData = {
-        consoleMessageStableId: 5,
-        type: 'log',
-        message: 'Hello',
-        args: ['Hello', 'World'],
-      };
-      const result = formatConsoleEventVerbose(message);
-      assert.equal(
-        result,
-        `Log> Hello Args: World
-  ID: 5
-  Type: log`,
-      );
+      t.assert.snapshot?.(result);
     });
   });
 });

tests/tools/console.test.ts

@@ -58,10 +58,6 @@ describe('console', () => {
 
         const formattedResponse = response.format('test', context);
         const textContent = formattedResponse[0] as {text: string};
-        assert.ok(
-          textContent.text.includes('## Console Message 1'),
-          'Should contain console message title',
-        );
         assert.ok(
           textContent.text.includes('msgid=1 [error] This is an error'),
           'Should contain console message body',