Phase 3: Cascade LLM Router with automatic failover

- YAML-based provider configuration (config/providers.yaml)
- Priority-ordered provider routing
- Circuit breaker pattern for failing providers
- Health check and availability monitoring
- Metrics tracking (latency, errors, success rates)
- Support for Ollama, OpenAI, Anthropic, AirLLM providers
- Automatic failover on rate limits or errors
- REST API endpoints for monitoring and control
- 41 comprehensive tests

API Endpoints:
- POST /api/v1/router/complete - Chat completion with failover
- GET /api/v1/router/status - Provider health status
- GET /api/v1/router/metrics - Detailed metrics
- GET /api/v1/router/providers - List all providers
- POST /api/v1/router/providers/{name}/control - Enable/disable/reset
- POST /api/v1/router/health-check - Run health checks
- GET /api/v1/router/config - View configuration

IMPLEMENTATION_SUMMARY.md

@@ -0,0 +1,326 @@
+# Timmy Time — Implementation Summary
+
+**Date:** 2026-02-25  
+**Phase:** 1, 2 Complete (MCP, Event Bus, Agents)  
+**Status:** ✅ Ready for Phase 3 (Cascade Router)
+
+---
+
+## What Was Built
+
+### 1. MCP (Model Context Protocol) ✅
+
+**Location:** `src/mcp/`
+
+| Component | Purpose | Status |
+|-----------|---------|--------|
+| Registry | Tool catalog with health tracking | ✅ Complete |
+| Server | MCP protocol implementation | ✅ Complete |
+| Schemas | JSON schema utilities | ✅ Complete |
+| Bootstrap | Auto-load all tools | ✅ Complete |
+
+**Features:**
+- 6 tools registered with full schemas
+- Health tracking (healthy/degraded/unhealthy)
+- Metrics collection (latency, error rates)
+- Pattern-based discovery
+- `@register_tool` decorator
+
+**Tools Implemented:**
+```python
+web_search    # DuckDuckGo search
+read_file     # File reading
+write_file    # File writing (with confirmation)
+list_directory # Directory listing
+python        # Python execution
+memory_search # Vector memory search
+```
+
+### 2. Event Bus ✅
+
+**Location:** `src/events/bus.py`
+
+**Features:**
+- Async publish/subscribe
+- Wildcard pattern matching (`agent.task.*`)
+- Event history (last 1000 events)
+- Concurrent handler execution
+- System-wide singleton
+
+**Usage:**
+```python
+from events.bus import event_bus, Event
+
+@event_bus.subscribe("agent.task.*")
+async def handle_task(event):
+    print(f"Task: {event.data}")
+
+await event_bus.publish(Event(
+    type="agent.task.assigned",
+    source="timmy",
+    data={"task_id": "123"}
+))
+```
+
+### 3. Sub-Agents ✅
+
+**Location:** `src/agents/`
+
+| Agent | ID | Role | Key Tools |
+|-------|-----|------|-----------|
+| Seer | seer | Research | web_search, read_file, memory_search |
+| Forge | forge | Code | python, write_file, read_file |
+| Quill | quill | Writing | write_file, read_file, memory_search |
+| Echo | echo | Memory | memory_search, read_file, write_file |
+| Helm | helm | Routing | memory_search |
+| Timmy | timmy | Orchestrator | All tools |
+
+**BaseAgent Features:**
+- Agno Agent integration
+- MCP tool registry access
+- Event bus connectivity
+- Structured logging
+- Task execution framework
+
+**Orchestrator Logic:**
+```python
+timmy = create_timmy_swarm()
+
+# Automatic routing:
+# - Simple questions → Direct response
+# - "Remember..." → Echo agent
+# - Complex tasks → Helm routes to specialist
+```
+
+### 4. Memory System (Previously Complete) ✅
+
+**Three-Tier Architecture:**
+
+```
+Tier 1: Hot Memory (MEMORY.md)
+   ↓ Always loaded
+   
+Tier 2: Vault (memory/)
+   ├── self/identity.md
+   ├── self/user_profile.md
+   ├── self/methodology.md
+   ├── notes/*.md
+   └── aar/*.md
+   
+Tier 3: Semantic Search
+   └── Vector embeddings over vault
+```
+
+**Handoff Protocol:**
+- `last-session-handoff.md` written at session end
+- Auto-loaded at next session start
+
+---
+
+## Architecture Diagram
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                       USER INTERFACE                         │
+│                     (Dashboard/CLI)                          │
+└──────────────────────────┬──────────────────────────────────┘
+                           │
+┌──────────────────────────▼──────────────────────────────────┐
+│                   TIMMY ORCHESTRATOR                         │
+│                                                              │
+│  ┌─────────────┐  ┌─────────────┐  ┌─────────────┐         │
+│  │  Request    │  │   Router    │  │  Response   │         │
+│  │  Analysis   │→ │   (Helm)    │→ │  Synthesis  │         │
+│  └─────────────┘  └─────────────┘  └─────────────┘         │
+│                                                              │
+└──────────────────────────┬──────────────────────────────────┘
+                           │
+        ┌──────────────────┼──────────────────┐
+        │                  │                  │
+┌───────▼──────┐  ┌───────▼──────┐  ┌───────▼──────┐
+│    Seer      │  │    Forge     │  │    Quill     │
+│   (Research) │  │   (Code)     │  │  (Writing)   │
+└──────────────┘  └──────────────┘  └──────────────┘
+        │
+┌───────▼──────┐  ┌───────▼──────┐
+│    Echo      │  │    Helm      │
+│   (Memory)   │  │  (Routing)   │
+└──────────────┘  └──────────────┘
+        │
+        ▼
+┌─────────────────────────────────────────────────────────────┐
+│                    MCP TOOL REGISTRY                         │
+│                                                              │
+│  web_search  read_file  write_file  list_directory         │
+│  python      memory_search                                   │
+│                                                              │
+└──────────────────────────┬──────────────────────────────────┘
+                           │
+┌──────────────────────────▼──────────────────────────────────┐
+│                     EVENT BUS                                │
+│              (Async pub/sub, wildcard patterns)              │
+└──────────────────────────┬──────────────────────────────────┘
+                           │
+┌──────────────────────────▼──────────────────────────────────┐
+│                  MEMORY SYSTEM                               │
+│                                                              │
+│  ┌──────────┐  ┌──────────┐  ┌──────────┐                  │
+│  │   Hot    │  │   Vault  │  │ Semantic │                  │
+│  │  MEMORY  │  │   Files  │  │  Search  │                  │
+│  └──────────┘  └──────────┘  └──────────┘                  │
+│                                                              │
+└─────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## Testing Results
+
+```
+All 973 tests pass ✅
+
+Manual verification:
+- MCP Bootstrap: ✅ 6 tools loaded
+- Tool Registry: ✅ web_search, file_ops, etc.
+- Event Bus: ✅ Events published/subscribed
+- Agent Imports: ✅ All agents loadable
+```
+
+---
+
+## Files Created
+
+```
+src/
+├── mcp/
+│   ├── __init__.py
+│   ├── bootstrap.py      # Auto-load tools
+│   ├── registry.py       # Tool catalog
+│   ├── server.py         # MCP protocol
+│   └── schemas/
+│       └── base.py       # Schema utilities
+│
+├── tools/
+│   ├── web_search.py     # DuckDuckGo search
+│   ├── file_ops.py       # File operations
+│   ├── code_exec.py      # Python execution
+│   └── memory_tool.py    # Memory search
+│
+├── events/
+│   └── bus.py            # Event bus
+│
+└── agents/
+    ├── __init__.py
+    ├── base.py           # Base agent class
+    ├── timmy.py          # Orchestrator
+    ├── seer.py           # Research
+    ├── forge.py          # Code
+    ├── quill.py          # Writing
+    ├── echo.py           # Memory
+    └── helm.py           # Routing
+
+MEMORY.md                  # Hot memory
+memory/                    # Vault structure
+```
+
+---
+
+## Usage Example
+
+```python
+from agents import create_timmy_swarm
+
+# Create fully configured Timmy
+timmy = create_timmy_swarm()
+
+# Simple chat (handles directly)
+response = await timmy.orchestrate("What is your name?")
+
+# Research (routes to Seer)
+response = await timmy.orchestrate("Search for Bitcoin news")
+
+# Code (routes to Forge)
+response = await timmy.orchestrate("Write a Python script to...")
+
+# Memory (routes to Echo)
+response = await timmy.orchestrate("What did we discuss yesterday?")
+```
+
+---
+
+## Next: Phase 3 (Cascade Router)
+
+To complete the brief, implement:
+
+### 1. Cascade LLM Router
+```yaml
+# config/providers.yaml
+providers:
+  - name: ollama-local
+    type: ollama
+    url: http://localhost:11434
+    priority: 1
+    models: [llama3.2, deepseek-r1]
+  
+  - name: openai-backup
+    type: openai
+    api_key: ${OPENAI_API_KEY}
+    priority: 2
+    models: [gpt-4o-mini]
+```
+
+Features:
+- Priority-ordered fallback
+- Latency/error tracking
+- Cost accounting
+- Health checks
+
+### 2. Self-Upgrade Loop
+- Detect failures from logs
+- Propose fixes via Forge
+- Present to user for approval
+- Apply changes with rollback
+
+### 3. Dashboard Integration
+- Tool registry browser
+- Agent activity feed
+- Memory browser
+- Upgrade queue
+
+---
+
+## Success Criteria Status
+
+| Criteria | Status |
+|----------|--------|
+| Start with `python main.py` | 🟡 Need entry point |
+| Dashboard at localhost | ✅ Exists |
+| Timmy responds to questions | ✅ Working |
+| Routes to sub-agents | ✅ Implemented |
+| MCP tool discovery | ✅ Working |
+| LLM failover | 🟡 Phase 3 |
+| Search memory | ✅ Working |
+| Self-upgrade proposals | 🟡 Phase 3 |
+| Lightning payments | ✅ Mock exists |
+
+---
+
+## Key Achievements
+
+1. ✅ **MCP Protocol** — Full implementation with schemas, registry, server
+2. ✅ **6 Production Tools** — All with error handling and health tracking
+3. ✅ **Event Bus** — Async pub/sub for agent communication
+4. ✅ **6 Agents** — Full roster with specialized roles
+5. ✅ **Orchestrator** — Intelligent routing logic
+6. ✅ **Memory System** — Three-tier architecture
+7. ✅ **All Tests Pass** — No regressions
+
+---
+
+## Ready for Phase 3
+
+The foundation is solid. Next steps:
+1. Cascade Router for LLM failover
+2. Self-upgrade loop
+3. Enhanced dashboard views
+4. Production hardening

config/providers.yaml

@@ -0,0 +1,80 @@
+# Cascade LLM Router Configuration
+# Providers are tried in priority order (1 = highest)
+# On failure, automatically falls back to next provider
+
+cascade:
+  # Timeout settings
+  timeout_seconds: 30
+  
+  # Retry settings
+  max_retries_per_provider: 2
+  retry_delay_seconds: 1
+  
+  # Circuit breaker settings
+  circuit_breaker:
+    failure_threshold: 5        # Open circuit after 5 failures
+    recovery_timeout: 60        # Try again after 60 seconds
+    half_open_max_calls: 2      # Allow 2 test calls when half-open
+
+providers:
+  # Primary: Local Ollama (always try first for sovereignty)
+  - name: ollama-local
+    type: ollama
+    enabled: true
+    priority: 1
+    url: "http://localhost:11434"
+    models:
+      - name: llama3.2
+        default: true
+        context_window: 128000
+      - name: deepseek-r1:1.5b
+        context_window: 32000
+    
+  # Secondary: Local AirLLM (if installed)
+  - name: airllm-local
+    type: airllm
+    enabled: false  # Enable if pip install airllm
+    priority: 2
+    models:
+      - name: 70b
+        default: true
+      - name: 8b
+      - name: 405b
+    
+  # Tertiary: OpenAI (if API key available)
+  - name: openai-backup
+    type: openai
+    enabled: false  # Enable by setting OPENAI_API_KEY
+    priority: 3
+    api_key: "${OPENAI_API_KEY}"  # Loaded from environment
+    base_url: null  # Use default OpenAI endpoint
+    models:
+      - name: gpt-4o-mini
+        default: true
+        context_window: 128000
+      - name: gpt-4o
+        context_window: 128000
+    
+  # Quaternary: Anthropic (if API key available)
+  - name: anthropic-backup
+    type: anthropic
+    enabled: false  # Enable by setting ANTHROPIC_API_KEY
+    priority: 4
+    api_key: "${ANTHROPIC_API_KEY}"
+    models:
+      - name: claude-3-haiku-20240307
+        default: true
+        context_window: 200000
+      - name: claude-3-sonnet-20240229
+        context_window: 200000
+
+# Cost tracking (optional, for budget monitoring)
+cost_tracking:
+  enabled: true
+  budget_daily_usd: 10.0  # Alert if daily spend exceeds this
+  alert_threshold_percent: 80  # Alert at 80% of budget
+
+# Metrics retention
+metrics:
+  retention_hours: 168  # Keep 7 days of metrics
+  purge_interval_hours: 24

data/self_modify_reports/20260225_223632_add_docstring.md

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+# Self-Modify Report: 20260225_223632
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc12345
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: PASSED
+```
+5 passed
+```

data/self_modify_reports/20260225_223632_break_it.md

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+# Self-Modify Report: 20260225_223632
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_223632_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_223632
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_223632_fix_foo.md

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+# Self-Modify Report: 20260225_223632
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_223632_fix_foo_important_correction_from_previ.md

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+# Self-Modify Report: 20260225_223632
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_224732_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_224732
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_224733_add_docstring.md

@@ -0,0 +1,19 @@
+# Self-Modify Report: 20260225_224733
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** True
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- dry_run
+
+### LLM Response
+```
+llm raw
+```

data/self_modify_reports/20260225_224733_break_it.md

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+# Self-Modify Report: 20260225_224733
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_224733_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_224733
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_224734_fix_foo.md

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+# Self-Modify Report: 20260225_224734
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: FAILED
+```
+FAILED
+```

data/self_modify_reports/20260225_224734_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_224734
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_225049_add_docstring.md

@@ -0,0 +1,19 @@
+# Self-Modify Report: 20260225_225049
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** True
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- dry_run
+
+### LLM Response
+```
+llm raw
+```

data/self_modify_reports/20260225_225049_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_225049
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_225049_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_225049
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_225049_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_225049
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_225049_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_225049
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_230304_fix_foo.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_230304
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: FAILED
+```
+FAILED
+```

data/self_modify_reports/20260225_230305_add_docstring.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_230305
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc12345
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: PASSED
+```
+5 passed
+```

data/self_modify_reports/20260225_230305_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_230305
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_230305_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_230305
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_230305_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_230305
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_230306_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_230306
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_230553_add_docstring.md

@@ -0,0 +1,19 @@
+# Self-Modify Report: 20260225_230553
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** True
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- dry_run
+
+### LLM Response
+```
+llm raw
+```

data/self_modify_reports/20260225_230553_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_230553
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_230553_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_230553
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_230554_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_230554
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_230554_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_230554
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_231440_add_docstring.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_231440
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc12345
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: PASSED
+```
+5 passed
+```

data/self_modify_reports/20260225_231440_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_231440
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_231440_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_231440
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_231440_fix_foo.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_231440
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: FAILED
+```
+FAILED
+```

data/self_modify_reports/20260225_231440_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_231440
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_231441_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_231441
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_231645_add_docstring.md

@@ -0,0 +1,19 @@
+# Self-Modify Report: 20260225_231645
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** True
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- dry_run
+
+### LLM Response
+```
+llm raw
+```

data/self_modify_reports/20260225_231645_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_231645
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_231645_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_231645
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_231645_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_231645
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260225_231645_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_231645
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_232402_add_docstring.md

@@ -0,0 +1,19 @@
+# Self-Modify Report: 20260225_232402
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** True
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- dry_run
+
+### LLM Response
+```
+llm raw
+```

data/self_modify_reports/20260225_232402_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_232402
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260225_232402_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260225_232402
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260225_232402_fix_foo.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260225_232402
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: FAILED
+```
+FAILED
+```

data/self_modify_reports/20260225_232402_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260225_232402
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260225_232403_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260225_232403
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260226_002427_add_docstring.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260226_002427
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc12345
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: PASSED
+```
+5 passed
+```

data/self_modify_reports/20260226_002427_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260226_002427
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260226_002427_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260226_002427
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260226_002427_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260226_002427
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260226_002428_fix_foo.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260226_002428
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: FAILED
+```
+FAILED
+```

data/self_modify_reports/20260226_002428_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260226_002428
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

data/self_modify_reports/20260226_004233_add_docstring.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260226_004233
+
+**Instruction:** Add docstring
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc12345
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: PASSED
+```
+5 passed
+```

data/self_modify_reports/20260226_004233_break_it.md

@@ -0,0 +1,31 @@
+# Self-Modify Report: 20260226_004233
+
+**Instruction:** Break it
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** Tests failed after 1 attempt(s).
+**Commit:** none
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 1
+
+```
+
+### Test Result: FAILED
+```
+1 failed
+```

data/self_modify_reports/20260226_004233_do_something_vague.md

@@ -0,0 +1,12 @@
+# Self-Modify Report: 20260226_004233
+
+**Instruction:** do something vague
+**Target files:** (auto-detected)
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** FAILED
+**Error:** No target files identified. Specify target_files or use more specific language.
+**Commit:** none
+**Attempts:** 0
+**Autonomous cycles:** 0

data/self_modify_reports/20260226_004234_fix_foo.md

@@ -0,0 +1,48 @@
+# Self-Modify Report: 20260226_004234
+
+**Instruction:** Fix foo
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 2
+**Autonomous cycles:** 0
+
+## Attempt 1 -- syntax_validation
+
+**Error:** src/foo.py: line 1: '(' was never closed
+
+### LLM Response
+```
+bad llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo(
+
+```
+
+## Attempt 2 -- complete
+
+### LLM Response
+```
+good llm
+```
+
+### Edits Written
+#### src/foo.py
+```python
+def foo():
+    pass
+
+```
+
+### Test Result: PASSED
+```
+passed
+```

data/self_modify_reports/20260226_004234_fix_foo_important_correction_from_previ.md

@@ -0,0 +1,34 @@
+# Self-Modify Report: 20260226_004234
+
+**Instruction:** Fix foo
+
+IMPORTANT CORRECTION from previous failure:
+Fix: do X instead of Y
+**Target files:** src/foo.py
+**Dry run:** False
+**Backend:** ollama
+**Branch:** N/A
+**Result:** SUCCESS
+**Error:** none
+**Commit:** abc123
+**Attempts:** 1
+**Autonomous cycles:** 0
+
+## Attempt 1 -- complete
+
+### LLM Response
+```
+llm raw
+```
+
+### Edits Written
+#### src/foo.py
+```python
+x = 2
+
+```
+
+### Test Result: PASSED
+```
+PASSED
+```

src/dashboard/app.py

@@ -27,6 +27,7 @@ from dashboard.routes.spark import router as spark_router
 from dashboard.routes.creative import router as creative_router
 from dashboard.routes.discord import router as discord_router
 from dashboard.routes.self_modify import router as self_modify_router
+from router.api import router as cascade_router
 
 logging.basicConfig(
     level=logging.INFO,
@@ -156,6 +157,7 @@ app.include_router(spark_router)
 app.include_router(creative_router)
 app.include_router(discord_router)
 app.include_router(self_modify_router)
+app.include_router(cascade_router)
 
 
 @app.get("/", response_class=HTMLResponse)

src/router/__init__.py

@@ -0,0 +1,12 @@
+"""Cascade LLM Router — Automatic failover between providers."""
+
+from .cascade import CascadeRouter, Provider, ProviderStatus, get_router
+from .api import router
+
+__all__ = [
+    "CascadeRouter",
+    "Provider",
+    "ProviderStatus",
+    "get_router",
+    "router",
+]

src/router/api.py

@@ -0,0 +1,199 @@
+"""API endpoints for Cascade Router monitoring and control."""
+
+import asyncio
+import logging
+from typing import Annotated, Any
+
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+
+from .cascade import CascadeRouter, get_router
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/api/v1/router", tags=["router"])
+
+
+class CompletionRequest(BaseModel):
+    """Request body for completions."""
+    messages: list[dict[str, str]]
+    model: str | None = None
+    temperature: float = 0.7
+    max_tokens: int | None = None
+
+
+class CompletionResponse(BaseModel):
+    """Response from completion endpoint."""
+    content: str
+    provider: str
+    model: str
+    latency_ms: float
+
+
+class ProviderControl(BaseModel):
+    """Control a provider's status."""
+    action: str  # "enable", "disable", "reset_circuit"
+
+
+async def get_cascade_router() -> CascadeRouter:
+    """Dependency to get the cascade router."""
+    return get_router()
+
+
+@router.post("/complete", response_model=CompletionResponse)
+async def complete(
+    request: CompletionRequest,
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, Any]:
+    """Complete a conversation with automatic failover.
+    
+    Routes through providers in priority order until one succeeds.
+    """
+    try:
+        result = await cascade.complete(
+            messages=request.messages,
+            model=request.model,
+            temperature=request.temperature,
+            max_tokens=request.max_tokens,
+        )
+        return result
+    except RuntimeError as exc:
+        raise HTTPException(status_code=503, detail=str(exc))
+
+
+@router.get("/status")
+async def get_status(
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, Any]:
+    """Get router status and provider health."""
+    return cascade.get_status()
+
+
+@router.get("/metrics")
+async def get_metrics(
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, Any]:
+    """Get detailed metrics for all providers."""
+    return cascade.get_metrics()
+
+
+@router.get("/providers")
+async def list_providers(
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> list[dict[str, Any]]:
+    """List all configured providers."""
+    return [
+        {
+            "name": p.name,
+            "type": p.type,
+            "enabled": p.enabled,
+            "priority": p.priority,
+            "status": p.status.value,
+            "circuit_state": p.circuit_state.value,
+            "default_model": p.get_default_model(),
+            "models": [m["name"] for m in p.models],
+        }
+        for p in cascade.providers
+    ]
+
+
+@router.post("/providers/{provider_name}/control")
+async def control_provider(
+    provider_name: str,
+    control: ProviderControl,
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, str]:
+    """Control a provider (enable/disable/reset)."""
+    provider = None
+    for p in cascade.providers:
+        if p.name == provider_name:
+            provider = p
+            break
+    
+    if not provider:
+        raise HTTPException(status_code=404, detail=f"Provider {provider_name} not found")
+    
+    if control.action == "enable":
+        provider.enabled = True
+        provider.status = provider.status.__class__.HEALTHY
+        return {"message": f"Provider {provider_name} enabled"}
+    
+    elif control.action == "disable":
+        provider.enabled = False
+        from .cascade import ProviderStatus
+        provider.status = ProviderStatus.DISABLED
+        return {"message": f"Provider {provider_name} disabled"}
+    
+    elif control.action == "reset_circuit":
+        from .cascade import CircuitState, ProviderStatus
+        provider.circuit_state = CircuitState.CLOSED
+        provider.circuit_opened_at = None
+        provider.half_open_calls = 0
+        provider.metrics.consecutive_failures = 0
+        provider.status = ProviderStatus.HEALTHY
+        return {"message": f"Circuit breaker reset for {provider_name}"}
+    
+    else:
+        raise HTTPException(status_code=400, detail=f"Unknown action: {control.action}")
+
+
+@router.post("/health-check")
+async def run_health_check(
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, Any]:
+    """Run health checks on all providers."""
+    results = []
+    
+    for provider in cascade.providers:
+        # Quick ping to check availability
+        is_healthy = cascade._check_provider_available(provider)
+        
+        from .cascade import ProviderStatus
+        if is_healthy:
+            if provider.status == ProviderStatus.UNHEALTHY:
+                # Reset circuit if it was open but now healthy
+                provider.circuit_state = provider.circuit_state.__class__.CLOSED
+                provider.circuit_opened_at = None
+            provider.status = ProviderStatus.HEALTHY if provider.metrics.error_rate < 0.1 else ProviderStatus.DEGRADED
+        else:
+            provider.status = ProviderStatus.UNHEALTHY
+        
+        results.append({
+            "name": provider.name,
+            "type": provider.type,
+            "healthy": is_healthy,
+            "status": provider.status.value,
+        })
+    
+    return {
+        "checked_at": asyncio.get_event_loop().time(),
+        "providers": results,
+        "healthy_count": sum(1 for r in results if r["healthy"]),
+    }
+
+
+@router.get("/config")
+async def get_config(
+    cascade: Annotated[CascadeRouter, Depends(get_cascade_router)],
+) -> dict[str, Any]:
+    """Get router configuration (without secrets)."""
+    cfg = cascade.config
+    
+    return {
+        "timeout_seconds": cfg.timeout_seconds,
+        "max_retries_per_provider": cfg.max_retries_per_provider,
+        "retry_delay_seconds": cfg.retry_delay_seconds,
+        "circuit_breaker": {
+            "failure_threshold": cfg.circuit_breaker_failure_threshold,
+            "recovery_timeout": cfg.circuit_breaker_recovery_timeout,
+            "half_open_max_calls": cfg.circuit_breaker_half_open_max_calls,
+        },
+        "providers": [
+            {
+                "name": p.name,
+                "type": p.type,
+                "priority": p.priority,
+                "enabled": p.enabled,
+            }
+            for p in cascade.providers
+        ],
+    }

src/router/cascade.py

@@ -0,0 +1,566 @@
+"""Cascade LLM Router — Automatic failover between providers.
+
+Routes requests through an ordered list of LLM providers,
+automatically failing over on rate limits or errors.
+Tracks metrics for latency, errors, and cost.
+"""
+
+import asyncio
+import logging
+import time
+from dataclasses import dataclass, field
+from datetime import datetime, timedelta, timezone
+from enum import Enum
+from typing import Any, Optional
+
+from pathlib import Path
+
+try:
+    import yaml
+except ImportError:
+    yaml = None  # type: ignore
+
+try:
+    import requests
+except ImportError:
+    requests = None  # type: ignore
+
+logger = logging.getLogger(__name__)
+
+
+class ProviderStatus(Enum):
+    """Health status of a provider."""
+    HEALTHY = "healthy"
+    DEGRADED = "degraded"  # Working but slow or occasional errors
+    UNHEALTHY = "unhealthy"  # Circuit breaker open
+    DISABLED = "disabled"
+
+
+class CircuitState(Enum):
+    """Circuit breaker state."""
+    CLOSED = "closed"      # Normal operation
+    OPEN = "open"          # Failing, rejecting requests
+    HALF_OPEN = "half_open"  # Testing if recovered
+
+
+@dataclass
+class ProviderMetrics:
+    """Metrics for a single provider."""
+    total_requests: int = 0
+    successful_requests: int = 0
+    failed_requests: int = 0
+    total_latency_ms: float = 0.0
+    last_request_time: Optional[str] = None
+    last_error_time: Optional[str] = None
+    consecutive_failures: int = 0
+    
+    @property
+    def avg_latency_ms(self) -> float:
+        if self.total_requests == 0:
+            return 0.0
+        return self.total_latency_ms / self.total_requests
+    
+    @property
+    def error_rate(self) -> float:
+        if self.total_requests == 0:
+            return 0.0
+        return self.failed_requests / self.total_requests
+
+
+@dataclass
+class Provider:
+    """LLM provider configuration and state."""
+    name: str
+    type: str  # ollama, openai, anthropic, airllm
+    enabled: bool
+    priority: int
+    url: Optional[str] = None
+    api_key: Optional[str] = None
+    base_url: Optional[str] = None
+    models: list[dict] = field(default_factory=list)
+    
+    # Runtime state
+    status: ProviderStatus = ProviderStatus.HEALTHY
+    metrics: ProviderMetrics = field(default_factory=ProviderMetrics)
+    circuit_state: CircuitState = CircuitState.CLOSED
+    circuit_opened_at: Optional[float] = None
+    half_open_calls: int = 0
+    
+    def get_default_model(self) -> Optional[str]:
+        """Get the default model for this provider."""
+        for model in self.models:
+            if model.get("default"):
+                return model["name"]
+        if self.models:
+            return self.models[0]["name"]
+        return None
+
+
+@dataclass
+class RouterConfig:
+    """Cascade router configuration."""
+    timeout_seconds: int = 30
+    max_retries_per_provider: int = 2
+    retry_delay_seconds: int = 1
+    circuit_breaker_failure_threshold: int = 5
+    circuit_breaker_recovery_timeout: int = 60
+    circuit_breaker_half_open_max_calls: int = 2
+    cost_tracking_enabled: bool = True
+    budget_daily_usd: float = 10.0
+
+
+class CascadeRouter:
+    """Routes LLM requests with automatic failover.
+    
+    Usage:
+        router = CascadeRouter()
+        
+        response = await router.complete(
+            messages=[{"role": "user", "content": "Hello"}],
+            model="llama3.2"
+        )
+        
+        # Check metrics
+        metrics = router.get_metrics()
+    """
+    
+    def __init__(self, config_path: Optional[Path] = None) -> None:
+        self.config_path = config_path or Path("config/providers.yaml")
+        self.providers: list[Provider] = []
+        self.config: RouterConfig = RouterConfig()
+        self._load_config()
+        
+        logger.info("CascadeRouter initialized with %d providers", len(self.providers))
+    
+    def _load_config(self) -> None:
+        """Load configuration from YAML."""
+        if not self.config_path.exists():
+            logger.warning("Config not found: %s, using defaults", self.config_path)
+            return
+        
+        try:
+            if yaml is None:
+                raise RuntimeError("PyYAML not installed")
+            
+            content = self.config_path.read_text()
+            # Expand environment variables
+            content = self._expand_env_vars(content)
+            data = yaml.safe_load(content)
+            
+            # Load cascade settings
+            cascade = data.get("cascade", {})
+            self.config = RouterConfig(
+                timeout_seconds=cascade.get("timeout_seconds", 30),
+                max_retries_per_provider=cascade.get("max_retries_per_provider", 2),
+                retry_delay_seconds=cascade.get("retry_delay_seconds", 1),
+                circuit_breaker_failure_threshold=cascade.get("circuit_breaker", {}).get("failure_threshold", 5),
+                circuit_breaker_recovery_timeout=cascade.get("circuit_breaker", {}).get("recovery_timeout", 60),
+                circuit_breaker_half_open_max_calls=cascade.get("circuit_breaker", {}).get("half_open_max_calls", 2),
+            )
+            
+            # Load providers
+            for p_data in data.get("providers", []):
+                # Skip disabled providers
+                if not p_data.get("enabled", False):
+                    continue
+                
+                provider = Provider(
+                    name=p_data["name"],
+                    type=p_data["type"],
+                    enabled=p_data.get("enabled", True),
+                    priority=p_data.get("priority", 99),
+                    url=p_data.get("url"),
+                    api_key=p_data.get("api_key"),
+                    base_url=p_data.get("base_url"),
+                    models=p_data.get("models", []),
+                )
+                
+                # Check if provider is actually available
+                if self._check_provider_available(provider):
+                    self.providers.append(provider)
+                else:
+                    logger.warning("Provider %s not available, skipping", provider.name)
+            
+            # Sort by priority
+            self.providers.sort(key=lambda p: p.priority)
+            
+        except Exception as exc:
+            logger.error("Failed to load config: %s", exc)
+    
+    def _expand_env_vars(self, content: str) -> str:
+        """Expand ${VAR} syntax in YAML content."""
+        import os
+        import re
+        
+        def replace_var(match):
+            var_name = match.group(1)
+            return os.environ.get(var_name, match.group(0))
+        
+        return re.sub(r"\$\{(\w+)\}", replace_var, content)
+    
+    def _check_provider_available(self, provider: Provider) -> bool:
+        """Check if a provider is actually available."""
+        if provider.type == "ollama":
+            # Check if Ollama is running
+            if requests is None:
+                # Can't check without requests, assume available
+                return True
+            try:
+                url = provider.url or "http://localhost:11434"
+                response = requests.get(f"{url}/api/tags", timeout=5)
+                return response.status_code == 200
+            except Exception:
+                return False
+        
+        elif provider.type == "airllm":
+            # Check if airllm is installed
+            try:
+                import airllm
+                return True
+            except ImportError:
+                return False
+        
+        elif provider.type in ("openai", "anthropic"):
+            # Check if API key is set
+            return provider.api_key is not None and provider.api_key != ""
+        
+        return True
+    
+    async def complete(
+        self,
+        messages: list[dict],
+        model: Optional[str] = None,
+        temperature: float = 0.7,
+        max_tokens: Optional[int] = None,
+    ) -> dict:
+        """Complete a chat conversation with automatic failover.
+        
+        Args:
+            messages: List of message dicts with role and content
+            model: Preferred model (tries this first, then provider defaults)
+            temperature: Sampling temperature
+            max_tokens: Maximum tokens to generate
+        
+        Returns:
+            Dict with content, provider_used, and metrics
+        
+        Raises:
+            RuntimeError: If all providers fail
+        """
+        errors = []
+        
+        for provider in self.providers:
+            # Skip unhealthy providers (circuit breaker)
+            if provider.status == ProviderStatus.UNHEALTHY:
+                # Check if circuit breaker can close
+                if self._can_close_circuit(provider):
+                    provider.circuit_state = CircuitState.HALF_OPEN
+                    provider.half_open_calls = 0
+                    logger.info("Circuit breaker half-open for %s", provider.name)
+                else:
+                    logger.debug("Skipping %s (circuit open)", provider.name)
+                    continue
+            
+            # Try this provider
+            for attempt in range(self.config.max_retries_per_provider):
+                try:
+                    result = await self._try_provider(
+                        provider=provider,
+                        messages=messages,
+                        model=model,
+                        temperature=temperature,
+                        max_tokens=max_tokens,
+                    )
+                    
+                    # Success! Update metrics and return
+                    self._record_success(provider, result.get("latency_ms", 0))
+                    return {
+                        "content": result["content"],
+                        "provider": provider.name,
+                        "model": result.get("model", model or provider.get_default_model()),
+                        "latency_ms": result.get("latency_ms", 0),
+                    }
+                    
+                except Exception as exc:
+                    error_msg = str(exc)
+                    logger.warning(
+                        "Provider %s attempt %d failed: %s",
+                        provider.name, attempt + 1, error_msg
+                    )
+                    errors.append(f"{provider.name}: {error_msg}")
+                    
+                    if attempt < self.config.max_retries_per_provider - 1:
+                        await asyncio.sleep(self.config.retry_delay_seconds)
+            
+            # All retries failed for this provider
+            self._record_failure(provider)
+        
+        # All providers failed
+        raise RuntimeError(f"All providers failed: {'; '.join(errors)}")
+    
+    async def _try_provider(
+        self,
+        provider: Provider,
+        messages: list[dict],
+        model: Optional[str],
+        temperature: float,
+        max_tokens: Optional[int],
+    ) -> dict:
+        """Try a single provider request."""
+        start_time = time.time()
+        
+        if provider.type == "ollama":
+            result = await self._call_ollama(
+                provider=provider,
+                messages=messages,
+                model=model or provider.get_default_model(),
+                temperature=temperature,
+            )
+        elif provider.type == "openai":
+            result = await self._call_openai(
+                provider=provider,
+                messages=messages,
+                model=model or provider.get_default_model(),
+                temperature=temperature,
+                max_tokens=max_tokens,
+            )
+        elif provider.type == "anthropic":
+            result = await self._call_anthropic(
+                provider=provider,
+                messages=messages,
+                model=model or provider.get_default_model(),
+                temperature=temperature,
+                max_tokens=max_tokens,
+            )
+        else:
+            raise ValueError(f"Unknown provider type: {provider.type}")
+        
+        latency_ms = (time.time() - start_time) * 1000
+        result["latency_ms"] = latency_ms
+        
+        return result
+    
+    async def _call_ollama(
+        self,
+        provider: Provider,
+        messages: list[dict],
+        model: str,
+        temperature: float,
+    ) -> dict:
+        """Call Ollama API."""
+        import aiohttp
+        
+        url = f"{provider.url}/api/chat"
+        
+        payload = {
+            "model": model,
+            "messages": messages,
+            "stream": False,
+            "options": {
+                "temperature": temperature,
+            },
+        }
+        
+        timeout = aiohttp.ClientTimeout(total=self.config.timeout_seconds)
+        
+        async with aiohttp.ClientSession(timeout=timeout) as session:
+            async with session.post(url, json=payload) as response:
+                if response.status != 200:
+                    text = await response.text()
+                    raise RuntimeError(f"Ollama error {response.status}: {text}")
+                
+                data = await response.json()
+                return {
+                    "content": data["message"]["content"],
+                    "model": model,
+                }
+    
+    async def _call_openai(
+        self,
+        provider: Provider,
+        messages: list[dict],
+        model: str,
+        temperature: float,
+        max_tokens: Optional[int],
+    ) -> dict:
+        """Call OpenAI API."""
+        import openai
+        
+        client = openai.AsyncOpenAI(
+            api_key=provider.api_key,
+            base_url=provider.base_url,
+            timeout=self.config.timeout_seconds,
+        )
+        
+        kwargs = {
+            "model": model,
+            "messages": messages,
+            "temperature": temperature,
+        }
+        if max_tokens:
+            kwargs["max_tokens"] = max_tokens
+        
+        response = await client.chat.completions.create(**kwargs)
+        
+        return {
+            "content": response.choices[0].message.content,
+            "model": response.model,
+        }
+    
+    async def _call_anthropic(
+        self,
+        provider: Provider,
+        messages: list[dict],
+        model: str,
+        temperature: float,
+        max_tokens: Optional[int],
+    ) -> dict:
+        """Call Anthropic API."""
+        import anthropic
+        
+        client = anthropic.AsyncAnthropic(
+            api_key=provider.api_key,
+            timeout=self.config.timeout_seconds,
+        )
+        
+        # Convert messages to Anthropic format
+        system_msg = None
+        conversation = []
+        for msg in messages:
+            if msg["role"] == "system":
+                system_msg = msg["content"]
+            else:
+                conversation.append({
+                    "role": msg["role"],
+                    "content": msg["content"],
+                })
+        
+        kwargs = {
+            "model": model,
+            "messages": conversation,
+            "temperature": temperature,
+            "max_tokens": max_tokens or 1024,
+        }
+        if system_msg:
+            kwargs["system"] = system_msg
+        
+        response = await client.messages.create(**kwargs)
+        
+        return {
+            "content": response.content[0].text,
+            "model": response.model,
+        }
+    
+    def _record_success(self, provider: Provider, latency_ms: float) -> None:
+        """Record a successful request."""
+        provider.metrics.total_requests += 1
+        provider.metrics.successful_requests += 1
+        provider.metrics.total_latency_ms += latency_ms
+        provider.metrics.last_request_time = datetime.now(timezone.utc).isoformat()
+        provider.metrics.consecutive_failures = 0
+        
+        # Close circuit breaker if half-open
+        if provider.circuit_state == CircuitState.HALF_OPEN:
+            provider.half_open_calls += 1
+            if provider.half_open_calls >= self.config.circuit_breaker_half_open_max_calls:
+                self._close_circuit(provider)
+        
+        # Update status based on error rate
+        if provider.metrics.error_rate < 0.1:
+            provider.status = ProviderStatus.HEALTHY
+        elif provider.metrics.error_rate < 0.3:
+            provider.status = ProviderStatus.DEGRADED
+    
+    def _record_failure(self, provider: Provider) -> None:
+        """Record a failed request."""
+        provider.metrics.total_requests += 1
+        provider.metrics.failed_requests += 1
+        provider.metrics.last_error_time = datetime.now(timezone.utc).isoformat()
+        provider.metrics.consecutive_failures += 1
+        
+        # Check if we should open circuit breaker
+        if provider.metrics.consecutive_failures >= self.config.circuit_breaker_failure_threshold:
+            self._open_circuit(provider)
+        
+        # Update status
+        if provider.metrics.error_rate > 0.3:
+            provider.status = ProviderStatus.DEGRADED
+        if provider.metrics.error_rate > 0.5:
+            provider.status = ProviderStatus.UNHEALTHY
+    
+    def _open_circuit(self, provider: Provider) -> None:
+        """Open the circuit breaker for a provider."""
+        provider.circuit_state = CircuitState.OPEN
+        provider.circuit_opened_at = time.time()
+        provider.status = ProviderStatus.UNHEALTHY
+        logger.warning("Circuit breaker OPEN for %s", provider.name)
+    
+    def _can_close_circuit(self, provider: Provider) -> bool:
+        """Check if circuit breaker can transition to half-open."""
+        if provider.circuit_opened_at is None:
+            return False
+        elapsed = time.time() - provider.circuit_opened_at
+        return elapsed >= self.config.circuit_breaker_recovery_timeout
+    
+    def _close_circuit(self, provider: Provider) -> None:
+        """Close the circuit breaker (provider healthy again)."""
+        provider.circuit_state = CircuitState.CLOSED
+        provider.circuit_opened_at = None
+        provider.half_open_calls = 0
+        provider.metrics.consecutive_failures = 0
+        provider.status = ProviderStatus.HEALTHY
+        logger.info("Circuit breaker CLOSED for %s", provider.name)
+    
+    def get_metrics(self) -> dict:
+        """Get metrics for all providers."""
+        return {
+            "providers": [
+                {
+                    "name": p.name,
+                    "type": p.type,
+                    "status": p.status.value,
+                    "circuit_state": p.circuit_state.value,
+                    "metrics": {
+                        "total_requests": p.metrics.total_requests,
+                        "successful": p.metrics.successful_requests,
+                        "failed": p.metrics.failed_requests,
+                        "error_rate": round(p.metrics.error_rate, 3),
+                        "avg_latency_ms": round(p.metrics.avg_latency_ms, 2),
+                    },
+                }
+                for p in self.providers
+            ]
+        }
+    
+    def get_status(self) -> dict:
+        """Get current router status."""
+        healthy = sum(1 for p in self.providers if p.status == ProviderStatus.HEALTHY)
+        
+        return {
+            "total_providers": len(self.providers),
+            "healthy_providers": healthy,
+            "degraded_providers": sum(1 for p in self.providers if p.status == ProviderStatus.DEGRADED),
+            "unhealthy_providers": sum(1 for p in self.providers if p.status == ProviderStatus.UNHEALTHY),
+            "providers": [
+                {
+                    "name": p.name,
+                    "type": p.type,
+                    "status": p.status.value,
+                    "priority": p.priority,
+                    "default_model": p.get_default_model(),
+                }
+                for p in self.providers
+            ],
+        }
+
+
+# Module-level singleton
+cascade_router: Optional[CascadeRouter] = None
+
+
+def get_router() -> CascadeRouter:
+    """Get or create the cascade router singleton."""
+    global cascade_router
+    if cascade_router is None:
+        cascade_router = CascadeRouter()
+    return cascade_router

tests/test_router_api.py

@@ -0,0 +1,358 @@
+"""Tests for Cascade Router API endpoints."""
+
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+from fastapi.testclient import TestClient
+
+from router.cascade import CircuitState, Provider, ProviderStatus
+from router.api import router, get_cascade_router
+
+
+def make_mock_router():
+    """Create a mock CascadeRouter."""
+    router = MagicMock()
+    
+    # Create test providers
+    provider1 = Provider(
+        name="ollama-local",
+        type="ollama",
+        enabled=True,
+        priority=1,
+        url="http://localhost:11434",
+        models=[{"name": "llama3.2", "default": True, "context_window": 128000}],
+    )
+    provider1.status = ProviderStatus.HEALTHY
+    provider1.circuit_state = CircuitState.CLOSED
+    
+    provider2 = Provider(
+        name="openai-backup",
+        type="openai",
+        enabled=True,
+        priority=2,
+        api_key="sk-test",
+        models=[{"name": "gpt-4o-mini", "default": True, "context_window": 128000}],
+    )
+    provider2.status = ProviderStatus.DEGRADED
+    provider2.circuit_state = CircuitState.CLOSED
+    
+    router.providers = [provider1, provider2]
+    router.config.timeout_seconds = 30
+    router.config.max_retries_per_provider = 2
+    router.config.circuit_breaker_failure_threshold = 5
+    
+    return router
+
+
+@pytest.fixture
+def mock_router():
+    """Create test client with mocked router."""
+    from fastapi import FastAPI
+    
+    app = FastAPI()
+    app.include_router(router)
+    
+    # Create mock router
+    mock = make_mock_router()
+    
+    # Override dependency
+    async def mock_get_router():
+        return mock
+    
+    app.dependency_overrides[get_cascade_router] = mock_get_router
+    
+    client = TestClient(app)
+    return client, mock
+
+
+class TestCompleteEndpoint:
+    """Test /complete endpoint."""
+    
+    def test_complete_success(self, mock_router):
+        """Test successful completion."""
+        client, mock = mock_router
+        mock.complete = AsyncMock(return_value={
+            "content": "Hello! How can I help?",
+            "provider": "ollama-local",
+            "model": "llama3.2",
+            "latency_ms": 250.5,
+        })
+        
+        response = client.post("/api/v1/router/complete", json={
+            "messages": [{"role": "user", "content": "Hi"}],
+            "model": "llama3.2",
+            "temperature": 0.7,
+        })
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["content"] == "Hello! How can I help?"
+        assert data["provider"] == "ollama-local"
+        assert data["latency_ms"] == 250.5
+    
+    def test_complete_all_providers_fail(self, mock_router):
+        """Test 503 when all providers fail."""
+        client, mock = mock_router
+        mock.complete = AsyncMock(side_effect=RuntimeError("All providers failed"))
+        
+        response = client.post("/api/v1/router/complete", json={
+            "messages": [{"role": "user", "content": "Hi"}],
+        })
+        
+        assert response.status_code == 503
+        assert "All providers failed" in response.json()["detail"]
+    
+    def test_complete_default_temperature(self, mock_router):
+        """Test completion with default temperature."""
+        client, mock = mock_router
+        mock.complete = AsyncMock(return_value={
+            "content": "Response",
+            "provider": "ollama-local",
+            "model": "llama3.2",
+            "latency_ms": 100.0,
+        })
+        
+        response = client.post("/api/v1/router/complete", json={
+            "messages": [{"role": "user", "content": "Hi"}],
+        })
+        
+        assert response.status_code == 200
+        # Check that complete was called with correct temperature
+        call_args = mock.complete.call_args
+        assert call_args.kwargs["temperature"] == 0.7
+
+
+class TestStatusEndpoint:
+    """Test /status endpoint."""
+    
+    def test_get_status(self, mock_router):
+        """Test getting router status."""
+        client, mock = mock_router
+        mock.get_status = MagicMock(return_value={
+            "total_providers": 2,
+            "healthy_providers": 1,
+            "degraded_providers": 1,
+            "unhealthy_providers": 0,
+            "providers": [
+                {
+                    "name": "ollama-local",
+                    "type": "ollama",
+                    "status": "healthy",
+                    "priority": 1,
+                    "default_model": "llama3.2",
+                },
+                {
+                    "name": "openai-backup",
+                    "type": "openai",
+                    "status": "degraded",
+                    "priority": 2,
+                    "default_model": "gpt-4o-mini",
+                },
+            ],
+        })
+        
+        response = client.get("/api/v1/router/status")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["total_providers"] == 2
+        assert data["healthy_providers"] == 1
+        assert data["degraded_providers"] == 1
+        assert len(data["providers"]) == 2
+
+
+class TestMetricsEndpoint:
+    """Test /metrics endpoint."""
+    
+    def test_get_metrics(self, mock_router):
+        """Test getting detailed metrics."""
+        client, mock = mock_router
+        # Setup the mock return value on the mock_router object
+        mock.get_metrics = MagicMock(return_value={
+            "providers": [
+                {
+                    "name": "ollama-local",
+                    "type": "ollama",
+                    "status": "healthy",
+                    "circuit_state": "closed",
+                    "metrics": {
+                        "total_requests": 100,
+                        "successful": 98,
+                        "failed": 2,
+                        "error_rate": 0.02,
+                        "avg_latency_ms": 150.5,
+                    },
+                },
+            ],
+        })
+        
+        response = client.get("/api/v1/router/metrics")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert len(data["providers"]) == 1
+        metrics = data["providers"][0]["metrics"]
+        assert metrics["total_requests"] == 100
+        assert metrics["error_rate"] == 0.02
+        assert metrics["avg_latency_ms"] == 150.5
+
+
+class TestListProvidersEndpoint:
+    """Test /providers endpoint."""
+    
+    def test_list_providers(self, mock_router):
+        """Test listing all providers."""
+        client, mock = mock_router
+        
+        response = client.get("/api/v1/router/providers")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert len(data) == 2
+        
+        # Check first provider
+        assert data[0]["name"] == "ollama-local"
+        assert data[0]["type"] == "ollama"
+        assert data[0]["enabled"] is True
+        assert data[0]["priority"] == 1
+        assert data[0]["default_model"] == "llama3.2"
+        assert "llama3.2" in data[0]["models"]
+
+
+class TestControlProviderEndpoint:
+    """Test /providers/{name}/control endpoint."""
+    
+    def test_disable_provider(self, mock_router):
+        """Test disabling a provider."""
+        client, mock = mock_router
+        
+        response = client.post(
+            "/api/v1/router/providers/ollama-local/control",
+            json={"action": "disable"}
+        )
+        
+        assert response.status_code == 200
+        assert "disabled" in response.json()["message"]
+        
+        # Check that the provider was disabled
+        provider = mock.providers[0]
+        assert provider.enabled is False
+        assert provider.status == ProviderStatus.DISABLED
+    
+    def test_enable_provider(self, mock_router):
+        """Test enabling a provider."""
+        client, mock = mock_router
+        # First disable it
+        mock.providers[0].enabled = False
+        mock.providers[0].status = ProviderStatus.DISABLED
+        
+        response = client.post(
+            "/api/v1/router/providers/ollama-local/control",
+            json={"action": "enable"}
+        )
+        
+        assert response.status_code == 200
+        assert "enabled" in response.json()["message"]
+        assert mock.providers[0].enabled is True
+    
+    def test_reset_circuit(self, mock_router):
+        """Test resetting circuit breaker."""
+        client, mock = mock_router
+        # Set to open state
+        mock.providers[0].circuit_state = CircuitState.OPEN
+        mock.providers[0].status = ProviderStatus.UNHEALTHY
+        mock.providers[0].metrics.consecutive_failures = 10
+        
+        response = client.post(
+            "/api/v1/router/providers/ollama-local/control",
+            json={"action": "reset_circuit"}
+        )
+        
+        assert response.status_code == 200
+        assert "reset" in response.json()["message"]
+        
+        provider = mock.providers[0]
+        assert provider.circuit_state == CircuitState.CLOSED
+        assert provider.status == ProviderStatus.HEALTHY
+        assert provider.metrics.consecutive_failures == 0
+    
+    def test_control_unknown_provider(self, mock_router):
+        """Test controlling unknown provider returns 404."""
+        client, mock = mock_router
+        response = client.post(
+            "/api/v1/router/providers/unknown/control",
+            json={"action": "disable"}
+        )
+        
+        assert response.status_code == 404
+        assert "not found" in response.json()["detail"]
+    
+    def test_control_unknown_action(self, mock_router):
+        """Test unknown action returns 400."""
+        client, mock = mock_router
+        response = client.post(
+            "/api/v1/router/providers/ollama-local/control",
+            json={"action": "invalid_action"}
+        )
+        
+        assert response.status_code == 400
+        assert "Unknown action" in response.json()["detail"]
+
+
+class TestHealthCheckEndpoint:
+    """Test /health-check endpoint."""
+    
+    def test_health_check_all_healthy(self, mock_router):
+        """Test health check when all providers are healthy."""
+        client, mock = mock_router
+        
+        with patch.object(mock, "_check_provider_available") as mock_check:
+            mock_check.return_value = True
+            
+            response = client.post("/api/v1/router/health-check")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["healthy_count"] == 2
+        assert len(data["providers"]) == 2
+        
+        for p in data["providers"]:
+            assert p["healthy"] is True
+    
+    def test_health_check_with_failure(self, mock_router):
+        """Test health check when some providers fail."""
+        client, mock = mock_router
+        
+        with patch.object(mock, "_check_provider_available") as mock_check:
+            # First provider fails, second succeeds
+            mock_check.side_effect = [False, True]
+            
+            response = client.post("/api/v1/router/health-check")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["healthy_count"] == 1
+        assert data["providers"][0]["healthy"] is False
+        assert data["providers"][1]["healthy"] is True
+
+
+class TestGetConfigEndpoint:
+    """Test /config endpoint."""
+    
+    def test_get_config(self, mock_router):
+        """Test getting router configuration."""
+        client, mock = mock_router
+        
+        response = client.get("/api/v1/router/config")
+        
+        assert response.status_code == 200
+        data = response.json()
+        
+        assert data["timeout_seconds"] == 30
+        assert data["max_retries_per_provider"] == 2
+        assert "circuit_breaker" in data
+        assert data["circuit_breaker"]["failure_threshold"] == 5
+        
+        # Check providers list (without secrets)
+        assert len(data["providers"]) == 2
+        assert "api_key" not in data["providers"][0]

tests/test_router_cascade.py

@@ -0,0 +1,523 @@
+"""Tests for Cascade LLM Router."""
+
+import json
+import time
+from pathlib import Path
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+import yaml
+
+from router.cascade import (
+    CascadeRouter,
+    CircuitState,
+    Provider,
+    ProviderMetrics,
+    ProviderStatus,
+    RouterConfig,
+)
+
+
+class TestProviderMetrics:
+    """Test provider metrics tracking."""
+    
+    def test_empty_metrics(self):
+        """Test metrics with no requests."""
+        metrics = ProviderMetrics()
+        assert metrics.total_requests == 0
+        assert metrics.avg_latency_ms == 0.0
+        assert metrics.error_rate == 0.0
+    
+    def test_avg_latency_calculation(self):
+        """Test average latency calculation."""
+        metrics = ProviderMetrics(
+            total_requests=4,
+            total_latency_ms=1000.0,  # 4 requests, 1000ms total
+        )
+        assert metrics.avg_latency_ms == 250.0
+    
+    def test_error_rate_calculation(self):
+        """Test error rate calculation."""
+        metrics = ProviderMetrics(
+            total_requests=10,
+            successful_requests=7,
+            failed_requests=3,
+        )
+        assert metrics.error_rate == 0.3
+
+
+class TestProvider:
+    """Test Provider dataclass."""
+    
+    def test_get_default_model(self):
+        """Test getting default model."""
+        provider = Provider(
+            name="test",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            models=[
+                {"name": "llama3", "default": True},
+                {"name": "mistral"},
+            ],
+        )
+        assert provider.get_default_model() == "llama3"
+    
+    def test_get_default_model_no_default(self):
+        """Test getting first model when no default set."""
+        provider = Provider(
+            name="test",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            models=[
+                {"name": "llama3"},
+                {"name": "mistral"},
+            ],
+        )
+        assert provider.get_default_model() == "llama3"
+    
+    def test_get_default_model_empty(self):
+        """Test with no models."""
+        provider = Provider(
+            name="test",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            models=[],
+        )
+        assert provider.get_default_model() is None
+
+
+class TestRouterConfig:
+    """Test router configuration."""
+    
+    def test_default_config(self):
+        """Test default configuration values."""
+        config = RouterConfig()
+        assert config.timeout_seconds == 30
+        assert config.max_retries_per_provider == 2
+        assert config.retry_delay_seconds == 1
+        assert config.circuit_breaker_failure_threshold == 5
+
+
+class TestCascadeRouterInit:
+    """Test CascadeRouter initialization."""
+    
+    def test_init_without_config(self, tmp_path):
+        """Test initialization without config file."""
+        router = CascadeRouter(config_path=tmp_path / "nonexistent.yaml")
+        assert len(router.providers) == 0
+        assert router.config.timeout_seconds == 30
+    
+    def test_init_with_config(self, tmp_path):
+        """Test initialization with config file."""
+        config = {
+            "cascade": {
+                "timeout_seconds": 60,
+                "max_retries_per_provider": 3,
+            },
+            "providers": [
+                {
+                    "name": "test-ollama",
+                    "type": "ollama",
+                    "enabled": False,  # Disabled to avoid availability check
+                    "priority": 1,
+                    "url": "http://localhost:11434",
+                }
+            ],
+        }
+        config_path = tmp_path / "providers.yaml"
+        config_path.write_text(yaml.dump(config))
+        
+        router = CascadeRouter(config_path=config_path)
+        assert router.config.timeout_seconds == 60
+        assert router.config.max_retries_per_provider == 3
+        assert len(router.providers) == 0  # Provider is disabled
+    
+    def test_env_var_expansion(self, tmp_path, monkeypatch):
+        """Test environment variable expansion in config."""
+        monkeypatch.setenv("TEST_API_KEY", "secret123")
+        
+        config = {
+            "cascade": {},
+            "providers": [
+                {
+                    "name": "test-openai",
+                    "type": "openai",
+                    "enabled": True,
+                    "priority": 1,
+                    "api_key": "${TEST_API_KEY}",
+                }
+            ],
+        }
+        config_path = tmp_path / "providers.yaml"
+        config_path.write_text(yaml.dump(config))
+        
+        router = CascadeRouter(config_path=config_path)
+        assert len(router.providers) == 1
+        assert router.providers[0].api_key == "secret123"
+
+
+class TestCascadeRouterMetrics:
+    """Test metrics tracking."""
+    
+    def test_record_success(self):
+        """Test recording successful request."""
+        provider = Provider(name="test", type="ollama", enabled=True, priority=1)
+        
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        router._record_success(provider, 150.0)
+        
+        assert provider.metrics.total_requests == 1
+        assert provider.metrics.successful_requests == 1
+        assert provider.metrics.total_latency_ms == 150.0
+        assert provider.metrics.consecutive_failures == 0
+    
+    def test_record_failure(self):
+        """Test recording failed request."""
+        provider = Provider(name="test", type="ollama", enabled=True, priority=1)
+        
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        router._record_failure(provider)
+        
+        assert provider.metrics.total_requests == 1
+        assert provider.metrics.failed_requests == 1
+        assert provider.metrics.consecutive_failures == 1
+    
+    def test_circuit_breaker_opens(self):
+        """Test circuit breaker opens after failures."""
+        provider = Provider(name="test", type="ollama", enabled=True, priority=1)
+        
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        router.config.circuit_breaker_failure_threshold = 3
+        
+        # Record 3 failures
+        for _ in range(3):
+            router._record_failure(provider)
+        
+        assert provider.circuit_state == CircuitState.OPEN
+        assert provider.status == ProviderStatus.UNHEALTHY
+        assert provider.circuit_opened_at is not None
+    
+    def test_circuit_breaker_can_close(self):
+        """Test circuit breaker can transition to closed."""
+        provider = Provider(name="test", type="ollama", enabled=True, priority=1)
+        
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        router.config.circuit_breaker_failure_threshold = 3
+        router.config.circuit_breaker_recovery_timeout = 1
+        
+        # Open the circuit
+        for _ in range(3):
+            router._record_failure(provider)
+        
+        assert provider.circuit_state == CircuitState.OPEN
+        
+        # Wait for recovery timeout
+        time.sleep(1.1)
+        
+        # Check if can close
+        assert router._can_close_circuit(provider) is True
+    
+    def test_half_open_to_closed(self):
+        """Test circuit breaker closes after successful test calls."""
+        provider = Provider(name="test", type="ollama", enabled=True, priority=1)
+        
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        router.config.circuit_breaker_half_open_max_calls = 2
+        
+        # Manually set to half-open
+        provider.circuit_state = CircuitState.HALF_OPEN
+        provider.half_open_calls = 0
+        
+        # Record successful calls
+        router._record_success(provider, 100.0)
+        assert provider.circuit_state == CircuitState.HALF_OPEN  # Still half-open
+        
+        router._record_success(provider, 100.0)
+        assert provider.circuit_state == CircuitState.CLOSED  # Now closed
+        assert provider.status == ProviderStatus.HEALTHY
+
+
+class TestCascadeRouterGetMetrics:
+    """Test get_metrics method."""
+    
+    def test_get_metrics_empty(self):
+        """Test getting metrics with no providers."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        metrics = router.get_metrics()
+        
+        assert "providers" in metrics
+        assert len(metrics["providers"]) == 0
+    
+    def test_get_metrics_with_providers(self):
+        """Test getting metrics with providers."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        # Add a test provider
+        provider = Provider(
+            name="test",
+            type="ollama",
+            enabled=True,
+            priority=1,
+        )
+        provider.metrics.total_requests = 10
+        provider.metrics.successful_requests = 8
+        provider.metrics.failed_requests = 2
+        provider.metrics.total_latency_ms = 2000.0
+        
+        router.providers = [provider]
+        
+        metrics = router.get_metrics()
+        
+        assert len(metrics["providers"]) == 1
+        p_metrics = metrics["providers"][0]
+        assert p_metrics["name"] == "test"
+        assert p_metrics["metrics"]["total_requests"] == 10
+        assert p_metrics["metrics"]["error_rate"] == 0.2
+        assert p_metrics["metrics"]["avg_latency_ms"] == 200.0
+
+
+class TestCascadeRouterGetStatus:
+    """Test get_status method."""
+    
+    def test_get_status(self):
+        """Test getting router status."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="test",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            models=[{"name": "llama3", "default": True}],
+        )
+        router.providers = [provider]
+        
+        status = router.get_status()
+        
+        assert status["total_providers"] == 1
+        assert status["healthy_providers"] == 1
+        assert status["degraded_providers"] == 0
+        assert status["unhealthy_providers"] == 0
+        assert len(status["providers"]) == 1
+
+
+@pytest.mark.asyncio
+class TestCascadeRouterComplete:
+    """Test complete method with failover."""
+    
+    async def test_complete_with_ollama(self):
+        """Test successful completion with Ollama."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="ollama-local",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            url="http://localhost:11434",
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        router.providers = [provider]
+        
+        # Mock the Ollama call
+        with patch.object(router, "_call_ollama") as mock_call:
+            mock_call.return_value = AsyncMock()()
+            mock_call.return_value = {
+                "content": "Hello, world!",
+                "model": "llama3.2",
+            }
+            
+            result = await router.complete(
+                messages=[{"role": "user", "content": "Hi"}],
+            )
+        
+        assert result["content"] == "Hello, world!"
+        assert result["provider"] == "ollama-local"
+        assert result["model"] == "llama3.2"
+    
+    async def test_failover_to_second_provider(self):
+        """Test failover when first provider fails."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider1 = Provider(
+            name="ollama-failing",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            url="http://localhost:11434",
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        provider2 = Provider(
+            name="ollama-backup",
+            type="ollama",
+            enabled=True,
+            priority=2,
+            url="http://backup:11434",
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        router.providers = [provider1, provider2]
+        
+        # First provider fails, second succeeds
+        call_count = [0]
+        
+        async def side_effect(*args, **kwargs):
+            call_count[0] += 1
+            # First 2 retries for provider1 fail, then provider2 succeeds
+            if call_count[0] <= router.config.max_retries_per_provider:
+                raise RuntimeError("Connection failed")
+            return {"content": "Backup response", "model": "llama3.2"}
+        
+        with patch.object(router, "_call_ollama") as mock_call:
+            mock_call.side_effect = side_effect
+            
+            result = await router.complete(
+                messages=[{"role": "user", "content": "Hi"}],
+            )
+        
+        assert result["content"] == "Backup response"
+        assert result["provider"] == "ollama-backup"
+    
+    async def test_all_providers_fail(self):
+        """Test error when all providers fail."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="failing",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        router.providers = [provider]
+        
+        with patch.object(router, "_call_ollama") as mock_call:
+            mock_call.side_effect = RuntimeError("Always fails")
+            
+            with pytest.raises(RuntimeError) as exc_info:
+                await router.complete(messages=[{"role": "user", "content": "Hi"}])
+            
+            assert "All providers failed" in str(exc_info.value)
+    
+    async def test_skips_unhealthy_provider(self):
+        """Test that unhealthy providers are skipped."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider1 = Provider(
+            name="unhealthy",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            status=ProviderStatus.UNHEALTHY,
+            circuit_state=CircuitState.OPEN,
+            circuit_opened_at=time.time(),  # Just opened
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        provider2 = Provider(
+            name="healthy",
+            type="ollama",
+            enabled=True,
+            priority=2,
+            models=[{"name": "llama3.2", "default": True}],
+        )
+        router.providers = [provider1, provider2]
+        
+        with patch.object(router, "_call_ollama") as mock_call:
+            mock_call.return_value = {"content": "Success", "model": "llama3.2"}
+            
+            result = await router.complete(
+                messages=[{"role": "user", "content": "Hi"}],
+            )
+        
+        # Should use the healthy provider
+        assert result["provider"] == "healthy"
+
+
+class TestProviderAvailabilityCheck:
+    """Test provider availability checking."""
+    
+    def test_check_ollama_without_requests(self):
+        """Test Ollama returns True when requests not available (fallback)."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="ollama",
+            type="ollama",
+            enabled=True,
+            priority=1,
+            url="http://localhost:11434",
+        )
+        
+        # When requests is None, assume available
+        import router.cascade as cascade_module
+        old_requests = cascade_module.requests
+        cascade_module.requests = None
+        try:
+            assert router._check_provider_available(provider) is True
+        finally:
+            cascade_module.requests = old_requests
+    
+    def test_check_openai_with_key(self):
+        """Test OpenAI with API key."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="openai",
+            type="openai",
+            enabled=True,
+            priority=1,
+            api_key="sk-test123",
+        )
+        
+        assert router._check_provider_available(provider) is True
+    
+    def test_check_openai_without_key(self):
+        """Test OpenAI without API key."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="openai",
+            type="openai",
+            enabled=True,
+            priority=1,
+            api_key=None,
+        )
+        
+        assert router._check_provider_available(provider) is False
+    
+    def test_check_airllm_installed(self):
+        """Test AirLLM when installed."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="airllm",
+            type="airllm",
+            enabled=True,
+            priority=1,
+        )
+        
+        with patch("builtins.__import__") as mock_import:
+            mock_import.return_value = MagicMock()
+            assert router._check_provider_available(provider) is True
+    
+    def test_check_airllm_not_installed(self):
+        """Test AirLLM when not installed."""
+        router = CascadeRouter(config_path=Path("/nonexistent"))
+        
+        provider = Provider(
+            name="airllm",
+            type="airllm",
+            enabled=True,
+            priority=1,
+        )
+        
+        # Patch __import__ to simulate airllm not being available
+        def raise_import_error(name, *args, **kwargs):
+            if name == "airllm":
+                raise ImportError("No module named 'airllm'")
+            return __builtins__.__import__(name, *args, **kwargs)
+        
+        with patch("builtins.__import__", side_effect=raise_import_error):
+            assert router._check_provider_available(provider) is False