fix: update automate github issues skill for retry mechanisms

[davideast]

Provide Retry Dispatching for Merge Conflicts

Retry Flow

flowchart TD
    A["Update branch from main"] --> B{"422 Conflict?"}
    B -- No --> C["Wait for CI → Merge"]
    B -- Yes --> D["Close conflicting PR"]
    D --> E["Re-dispatch: new Jules session<br/>same task prompt, current main"]
    E --> F["Wait for new PR"]
    F --> A

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Detailed Flow

flowchart TD
    subgraph analyze ["Phase 1: Analyze"]
        A1["Fetch open GitHub issues"] --> A2["Format as structured markdown"]
    end

    subgraph plan ["Phase 2: Plan"]
        A2 --> B1["Create Jules planning session"]
        B1 --> B2["Investigate: trace issues to source code"]
        B2 --> B3["Architect: design solutions with diffs"]
        B3 --> B4["Build File Ownership Matrix"]
        B4 --> B5{"Any file in 2+ tasks?"}
        B5 -- Yes --> B6["Merge overlapping tasks"]
        B6 --> B4
        B5 -- No --> B7["Write task plan to .fleet/"]
    end

    subgraph validate ["Phase 3: Validate"]
        B7 --> C1["Read issue_tasks.json"]
        C1 --> C2{"Ownership conflict?"}
        C2 -- Yes --> C3["❌ Abort before dispatch"]
        C2 -- No --> C4["✅ Safe to parallelize"]
    end

    subgraph dispatch ["Phase 4: Dispatch"]
        C4 --> D1["jules.all — spawn parallel sessions"]
        D1 --> D2["Each session targets same base branch"]
        D2 --> D3["Sessions produce PRs"]
    end

    subgraph merge ["Phase 5: Merge"]
        D3 --> E1["Process PRs sequentially by risk"]
        E1 --> E2["Update branch from base"]
        E2 --> E3{"Merge conflict?"}
        E3 -- No --> E4["Wait for CI"]
        E4 --> E5{"CI passed?"}
        E5 -- Yes --> E6["Squash merge"]
        E5 -- No --> E7["❌ Abort"]
        E6 --> E8{"More PRs?"}
        E8 -- Yes --> E1
        E8 -- No --> E9["✅ All merged"]
        E3 -- Yes --> E10{"Retries left?"}
        E10 -- No --> E11["❌ Escalate to human"]
        E10 -- Yes --> E12["Close old PR"]
        E12 --> E13["Re-dispatch: new Jules session\nagainst current base"]
        E13 --> E14["Wait for new PR"]
        E14 --> E2
    end

    style analyze fill:#1a2332,stroke:#2a4a6b,color:#e0e0e0
    style plan fill:#1a2332,stroke:#2a4a6b,color:#e0e0e0
    style validate fill:#1a2332,stroke:#2a4a6b,color:#e0e0e0
    style dispatch fill:#1a2332,stroke:#2a4a6b,color:#e0e0e0
    style merge fill:#1a2332,stroke:#2a4a6b,color:#e0e0e0

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