webui: Agentic Loop + MCP Client with support for Tools, Resources and Prompts (#18655)

2026-03-06 10:00:39 +01:00
parent 2850bc6a13
commit f6235a41ef
147 changed files with 15285 additions and 366 deletions
@@ -0,0 +1,81 @@
+import { describe, it, expect } from 'vitest';
+import { AGENTIC_REGEX } from '$lib/constants/agentic';
+
+// Mirror the logic in ChatService.stripReasoningContent so we can test it in isolation.
+// The real function is private static, so we replicate the strip pipeline here.
+function stripContextMarkers(content: string): string {
+	return content
+		.replace(AGENTIC_REGEX.REASONING_BLOCK, '')
+		.replace(AGENTIC_REGEX.REASONING_OPEN, '')
+		.replace(AGENTIC_REGEX.AGENTIC_TOOL_CALL_BLOCK, '')
+		.replace(AGENTIC_REGEX.AGENTIC_TOOL_CALL_OPEN, '');
+}
+
+// A realistic complete tool call block as stored in message.content after a turn.
+const COMPLETE_BLOCK =
+	'\n\n<<<AGENTIC_TOOL_CALL_START>>>\n' +
+	'<<<TOOL_NAME:bash_tool>>>\n' +
+	'<<<TOOL_ARGS_START>>>\n' +
+	'{"command":"ls /tmp","description":"list tmp"}\n' +
+	'<<<TOOL_ARGS_END>>>\n' +
+	'file1.txt\nfile2.txt\n' +
+	'<<<AGENTIC_TOOL_CALL_END>>>\n';
+
+// Partial block: streaming was cut before END arrived.
+const OPEN_BLOCK =
+	'\n\n<<<AGENTIC_TOOL_CALL_START>>>\n' +
+	'<<<TOOL_NAME:bash_tool>>>\n' +
+	'<<<TOOL_ARGS_START>>>\n' +
+	'{"command":"ls /tmp","description":"list tmp"}\n' +
+	'<<<TOOL_ARGS_END>>>\n' +
+	'partial output...';
+
+describe('agentic marker stripping for context', () => {
+	it('strips a complete tool call block, leaving surrounding text', () => {
+		const input = 'Before.' + COMPLETE_BLOCK + 'After.';
+		const result = stripContextMarkers(input);
+		// markers gone; residual newlines between fragments are fine
+		expect(result).not.toContain('<<<');
+		expect(result).toContain('Before.');
+		expect(result).toContain('After.');
+	});
+
+	it('strips multiple complete tool call blocks', () => {
+		const input = 'A' + COMPLETE_BLOCK + 'B' + COMPLETE_BLOCK + 'C';
+		const result = stripContextMarkers(input);
+		expect(result).not.toContain('<<<');
+		expect(result).toContain('A');
+		expect(result).toContain('B');
+		expect(result).toContain('C');
+	});
+
+	it('strips an open/partial tool call block (no END marker)', () => {
+		const input = 'Lead text.' + OPEN_BLOCK;
+		const result = stripContextMarkers(input);
+		expect(result).toBe('Lead text.');
+		expect(result).not.toContain('<<<');
+	});
+
+	it('does not alter content with no markers', () => {
+		const input = 'Just a normal assistant response.';
+		expect(stripContextMarkers(input)).toBe(input);
+	});
+
+	it('strips reasoning block independently', () => {
+		const input = '<<<reasoning_content_start>>>think hard<<<reasoning_content_end>>>Answer.';
+		expect(stripContextMarkers(input)).toBe('Answer.');
+	});
+
+	it('strips both reasoning and agentic blocks together', () => {
+		const input =
+			'<<<reasoning_content_start>>>plan<<<reasoning_content_end>>>' +
+			'Some text.' +
+			COMPLETE_BLOCK;
+		expect(stripContextMarkers(input)).not.toContain('<<<');
+		expect(stripContextMarkers(input)).toContain('Some text.');
+	});
+
+	it('empty string survives', () => {
+		expect(stripContextMarkers('')).toBe('');
+	});
+});