feat: add dedicated testing agents and enhanced parallel orchestration

Introduce a new testing agent architecture that runs regression tests
independently from coding agents, improving quality assurance in
parallel mode.

Key changes:

Testing Agent System:
- Add testing_prompt.template.md for dedicated testing agent role
- Add feature_mark_failing MCP tool for regression detection
- Add --agent-type flag to select initializer/coding/testing mode
- Remove regression testing from coding prompt (now handled by testing agents)

Parallel Orchestrator Enhancements:
- Add testing agent spawning with configurable ratio (--testing-agent-ratio)
- Add comprehensive debug logging system (DebugLog class)
- Improve database session management to prevent stale reads
- Add engine.dispose() calls to refresh connections after subprocess commits
- Fix f-string linting issues (remove unnecessary f-prefixes)

UI Improvements:
- Add testing agent mascot (Chip) to AgentAvatar
- Enhance AgentCard to display testing agent status
- Add testing agent ratio slider in SettingsModal
- Update WebSocket handling for testing agent updates
- Improve ActivityFeed to show testing agent activity

API & Server Updates:
- Add testing_agent_ratio to settings schema and endpoints
- Update process manager to support testing agent type
- Enhance WebSocket messages for agent_update events

Template Changes:
- Delete coding_prompt_yolo.template.md (consolidated into main prompt)
- Update initializer_prompt.template.md with improved structure
- Streamline coding_prompt.template.md workflow

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ui/src/lib/api.ts

@@ -200,6 +200,8 @@ export async function startAgent(
     yoloMode?: boolean
     parallelMode?: boolean
     maxConcurrency?: number
+    testingAgentRatio?: number
+    countTestingInConcurrency?: boolean
   } = {}
 ): Promise<AgentActionResponse> {
   return fetchJSON(`/projects/${encodeURIComponent(projectName)}/agent/start`, {
@@ -208,6 +210,8 @@ export async function startAgent(
       yolo_mode: options.yoloMode ?? false,
       parallel_mode: options.parallelMode ?? false,
       max_concurrency: options.maxConcurrency,
+      testing_agent_ratio: options.testingAgentRatio,
+      count_testing_in_concurrency: options.countTestingInConcurrency,
     }),
   })
 }

ui/src/lib/types.ts

@@ -119,7 +119,7 @@ export interface FeatureUpdate {
 }
 
 // Agent types
-export type AgentStatus = 'stopped' | 'running' | 'paused' | 'crashed'
+export type AgentStatus = 'stopped' | 'running' | 'paused' | 'crashed' | 'loading'
 
 export interface AgentStatusResponse {
   status: AgentStatus
@@ -127,8 +127,10 @@ export interface AgentStatusResponse {
   started_at: string | null
   yolo_mode: boolean
   model: string | null  // Model being used by running agent
-  parallel_mode: boolean
+  parallel_mode: boolean  // DEPRECATED: Always true now (unified orchestrator)
   max_concurrency: number | null
+  testing_agent_ratio: number  // Testing agents per coding agent (0-3)
+  count_testing_in_concurrency: boolean  // Count testing toward concurrency limit
 }
 
 export interface AgentActionResponse {
@@ -171,12 +173,20 @@ export interface TerminalInfo {
 }
 
 // Agent mascot names for multi-agent UI
-export const AGENT_MASCOTS = ['Spark', 'Fizz', 'Octo', 'Hoot', 'Buzz'] as const
+export const AGENT_MASCOTS = [
+  'Spark', 'Fizz', 'Octo', 'Hoot', 'Buzz',    // Original 5
+  'Pixel', 'Byte', 'Nova', 'Chip', 'Bolt',    // Tech-inspired
+  'Dash', 'Zap', 'Gizmo', 'Turbo', 'Blip',    // Energetic
+  'Neon', 'Widget', 'Zippy', 'Quirk', 'Flux', // Playful
+] as const
 export type AgentMascot = typeof AGENT_MASCOTS[number]
 
 // Agent state for Mission Control
 export type AgentState = 'idle' | 'thinking' | 'working' | 'testing' | 'success' | 'error' | 'struggling'
 
+// Agent type (coding vs testing)
+export type AgentType = 'coding' | 'testing'
+
 // Individual log entry for an agent
 export interface AgentLogEntry {
   line: string
@@ -188,6 +198,7 @@ export interface AgentLogEntry {
 export interface ActiveAgent {
   agentIndex: number
   agentName: AgentMascot
+  agentType: AgentType  // "coding" or "testing"
   featureId: number
   featureName: string
   state: AgentState
@@ -226,6 +237,7 @@ export interface WSAgentUpdateMessage {
   type: 'agent_update'
   agentIndex: number
   agentName: AgentMascot
+  agentType: AgentType  // "coding" or "testing"
   featureId: number
   featureName: string
   state: AgentState
@@ -467,9 +479,13 @@ export interface Settings {
   yolo_mode: boolean
   model: string
   glm_mode: boolean
+  testing_agent_ratio: number  // Testing agents per coding agent (0-3)
+  count_testing_in_concurrency: boolean  // Count testing toward concurrency limit
 }
 
 export interface SettingsUpdate {
   yolo_mode?: boolean
   model?: string
+  testing_agent_ratio?: number
+  count_testing_in_concurrency?: boolean
 }