docs: Add system architecture and task flow diagrams

docs/SYSTEM_ARCHITECTURE.md

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+# Bzzz System Architecture & Flow
+
+This document contains diagrams to visualize the architecture and data flows of the Bzzz distributed task coordination system.
+
+---
+
+## 1. Component Architecture Diagram
+
+This diagram shows the main components of the Bzzz ecosystem and their relationships. It illustrates the static structure of the system, including internal modules, external dependencies, and P2P connections.
+
+```mermaid
+graph TD
+    subgraph "External Systems"
+        GitHub[(GitHub Repositories)] -- "Tasks (Issues/PRs)" --> BzzzAgent
+        HiveAPI[Hive REST API] -- "Repo Lists & Status Updates" --> BzzzAgent
+        N8N([N8N Webhooks]) -- "Receives Escalations"
+        Ollama[Ollama API] -- "LLM Inference"
+    end
+
+    subgraph "Bzzz Agent Node"
+        BzzzAgent[Bzzz Agent]
+        BzzzAgent -- "Manages" --> P2P
+        BzzzAgent -- "Uses" --> Integration
+        BzzzAgent -- "Uses" --> Executor
+        BzzzAgent -- "Uses" --> Logging
+
+        P2P(P2P/PubSub Layer) -- "Discovers Peers" --> Discovery
+        P2P -- "Communicates via" --> Antennae
+
+        Integration(GitHub Integration) -- "Polls for Tasks" --> HiveAPI
+        Integration -- "Claims Tasks" --> GitHub
+
+        Executor(Task Executor) -- "Runs Commands In" --> Sandbox
+        Executor -- "Gets Next Command From" --> Reasoning
+
+        Reasoning(Reasoning Module) -- "Sends Prompts To" --> Ollama
+
+        Sandbox(Docker Sandbox) -- "Isolated Environment"
+
+        Logging(Hypercore Logging) -- "Creates Audit Trail"
+
+        Discovery(mDNS Discovery)
+    end
+
+    BzzzAgent -- "P2P Comms" --> OtherAgent[Other Bzzz Agent]
+    OtherAgent -- "P2P Comms" --> BzzzAgent
+    Executor -- "Escalates To" --> N8N
+
+    classDef internal fill:#D6EAF8,stroke:#2E86C1,stroke-width:2px;
+    class BzzzAgent,P2P,Integration,Executor,Reasoning,Sandbox,Logging,Discovery internal
+
+    classDef external fill:#E8DAEF,stroke:#8E44AD,stroke-width:2px;
+    class GitHub,HiveAPI,N8N,Ollama external
+end
+```
+
+---
+
+## 2. Task Execution Flowchart
+
+This flowchart illustrates the dynamic lifecycle of a single task, from the moment it's available to its final completion and pull request creation.
+
+```mermaid
+flowchart TD
+    A[Start: Unassigned Task on GitHub] --> B{Bzzz Agent Polls Hive API};
+    B --> C{Discovers Active Repositories};
+    C --> D{Polls Repos for Suitable Tasks};
+    D --> E{Task Found?};
+    E -- No --> B;
+    E -- Yes --> F[Agent Claims Task via GitHub API];
+    F --> G[Report Claim to Hive API];
+    G --> H[Announce Claim on P2P PubSub];
+
+    subgraph "Task Execution Loop"
+        I[Create Docker Sandbox] --> J[Clone Repository];
+        J --> K{Generate Next Command via Reasoning/Ollama};
+        K --> L{Is Task Complete?};
+        L -- No --> M[Execute Command in Sandbox];
+        M --> N[Feed Output Back to Reasoning];
+        N --> K;
+    end
+
+    H --> I;
+    L -- Yes --> O[Create Branch & Commit Changes];
+    O --> P[Push Branch to GitHub];
+    P --> Q[Create Pull Request];
+    Q --> R[Report Completion to Hive API];
+    R --> S[Announce Completion on PubSub];
+    S --> T[Destroy Docker Sandbox];
+    T --> Z[End];
+
+    subgraph "Meta-Discussion (Antennae)"
+        direction LR
+        MD1{Agent Proposes Plan} -- PubSub --> MD2[Other Agents Review];
+        MD2 -- Feedback --> MD1;
+        MD1 -- "Stuck?" --> MD3{Escalate to N8N};
+    end
+
+    H -.-> MD1;
+    K -. "Needs Help" .-> MD1
+
+end
+```