first commit

tests/test_agent_context.py

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+from __future__ import annotations
+
+import shutil
+import subprocess
+import tempfile
+import unittest
+from pathlib import Path
+
+from src.agent_context import (
+    build_context_snapshot,
+    clear_context_caches,
+    set_system_prompt_injection,
+)
+from src.agent_types import AgentRuntimeConfig
+
+
+class AgentContextTests(unittest.TestCase):
+    def tearDown(self) -> None:
+        set_system_prompt_injection(None)
+        clear_context_caches()
+
+    def test_user_context_loads_project_claude_md_files(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            workspace = Path(tmp_dir) / 'repo' / 'nested'
+            workspace.mkdir(parents=True)
+            (workspace.parent / 'CLAUDE.md').write_text('root instructions\n', encoding='utf-8')
+            (workspace / 'CLAUDE.local.md').write_text('local instructions\n', encoding='utf-8')
+
+            snapshot = build_context_snapshot(AgentRuntimeConfig(cwd=workspace))
+
+        self.assertIn('currentDate', snapshot.user_context)
+        self.assertIn('claudeMd', snapshot.user_context)
+        self.assertIn('root instructions', snapshot.user_context['claudeMd'])
+        self.assertIn('local instructions', snapshot.user_context['claudeMd'])
+
+    def test_system_context_includes_cache_breaker(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            set_system_prompt_injection('debug-token')
+            snapshot = build_context_snapshot(AgentRuntimeConfig(cwd=Path(tmp_dir)))
+
+        self.assertEqual(snapshot.system_context['cacheBreaker'], '[CACHE_BREAKER: debug-token]')
+
+    @unittest.skipIf(shutil.which('git') is None, 'git is required for git context tests')
+    def test_git_status_snapshot_contains_branch_and_status(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            workspace = Path(tmp_dir)
+            subprocess.run(['git', 'init', '-b', 'main'], cwd=workspace, check=True)
+            subprocess.run(['git', 'config', 'user.name', 'Tester'], cwd=workspace, check=True)
+            subprocess.run(['git', 'config', 'user.email', 'tester@example.com'], cwd=workspace, check=True)
+            (workspace / 'tracked.txt').write_text('hello\n', encoding='utf-8')
+            subprocess.run(['git', 'add', 'tracked.txt'], cwd=workspace, check=True)
+            subprocess.run(['git', 'commit', '-m', 'initial'], cwd=workspace, check=True)
+            (workspace / 'tracked.txt').write_text('changed\n', encoding='utf-8')
+
+            snapshot = build_context_snapshot(AgentRuntimeConfig(cwd=workspace))
+
+        git_status = snapshot.system_context.get('gitStatus', '')
+        self.assertIn('Current branch: main', git_status)
+        self.assertIn('Status:', git_status)
+        self.assertIn('tracked.txt', git_status)