Initial commit: Agentic OS troubleshooting platform

Self-hosted, Docker-based agentic troubleshooting platform: FastAPI backend +
LangGraph agent, Next.js UI, tiered LLM routing (local Ollama -> Gemini ->
DeepSeek -> OpenRouter), MCP server manager, encrypted device credentials,
RBAC, audit log, project-memory + Obsidian integrations, and editable
troubleshooting decision rules tuned for the GeneseasX vessel stack.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_investigation_context.py

@@ -0,0 +1,45 @@
+"""Tests for investigation context gathering."""
+from __future__ import annotations
+
+import os
+import tempfile
+
+os.environ.setdefault("SECRET_KEY", "test-secret-key-for-unit-tests-only")
+
+from app.services.investigation_context import (  # noqa: E402
+    _score_obsidian_file,
+    extract_search_keywords,
+    _obsidian_title,
+)
+
+
+def test_extract_search_keywords_from_issue():
+    terms = extract_search_keywords("Asterisk health status on GeneseasX voip container")
+    assert "asterisk" in terms
+    assert "geneseasx" in terms
+    assert "voip" in terms
+    assert "health" not in terms  # stopword
+
+
+def test_obsidian_title_from_markdown():
+    text = "# Asterisk health status\n\nSome body"
+    assert _obsidian_title(text, "2026-06-13-asterisk.md") == "Asterisk health status"
+
+
+def test_memory_vessel_from_tags():
+    from app.services.investigation_context import _memory_vessel_from_hit, _obsidian_vessel_from_text
+
+    hit = {"tags": ["agentic-os", "vessel:geneseasx-test"], "content": "", "title": "[Task] foo"}
+    assert _memory_vessel_from_hit(hit) == "geneseasx test"
+
+    text = "---\ntags: [agentic-os]\nvessel: test\nstatus: unresolved\n---\n# Title"
+    assert _obsidian_vessel_from_text(text) == "test"
+
+
+def test_score_obsidian_file_matches_keywords():
+    score = _score_obsidian_file(
+        "/vault/agentic-os-tasks/2026-06-13-asterisk-health.md",
+        "Asterisk pjsip registration failed on voip container",
+        ["asterisk", "voip"],
+    )
+    assert score >= 3