sequenceDiagram
    rect rgba(200,200,255,0.5)
    participant SPV as SPV Library
    end
    rect rgba(200,255,200,0.5)
    participant Manager as SPV Manager
    end
    rect rgba(255,200,200,0.5)
    participant Status as ConnectionStatus
    end
    rect rgba(255,230,200,0.5)
    participant UI as TopPanel/UI
    end

    SPV->>Manager: progress update (SyncState)
    alt SyncState::Error
        Manager->>Manager: set last_error (Arc) if not present
        Manager->>Status: update SpvStatus::Error with detail
        Manager->>Status: emit diagnostic log
        Status->>UI: refresh -> OverallConnectionState::Error (include detail)
        UI->>UI: render magenta indicator + "!"
    else SyncState::Running/Complete
        Manager->>Status: update SpvStatus::Running/Synced
        Status->>UI: refresh -> Synced/Syncing
    end

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Audit Summary

Reviewed by: Claude Code with a 2-agent team:

• code-reviewer — correctness, conventions, state machine, UI logic, test doc accuracy
• security-engineer — concurrency safety, OWASP classification, information disclosure, resource consumption

Overall Risk: LOW — well-scoped status propagation change with no new attack surface.

Findings

Pre-existing / Out-of-scope

• Existing CodeRabbit review comment about last_error overwrite was already addressed by the is_none() guard + nested lock fix in c7f66d4.

Positive Observations

• All match arms on OverallConnectionState are exhaustive across the codebase — no missed patterns.
• network_chooser_screen.rs != Disconnected checks naturally and correctly include Error.
• Excellent explanatory comment in event handler about why direct ManagerError handling is needed (dash-spv doesn't update progress channel on error path).
• reset() properly clears spv_last_error — good state hygiene.
• Clean state machine: Error reachable only via explicit SpvStatus::Error, cleared on start()/reset().
• Consistent poisoned-lock handling (if let Ok(...)) throughout.
• Commit structure is logical and atomic across 4 commits.

Redundancy

Both agents flagged the nested lock issue (code-reviewer as "overwrite asymmetry", security as "nested lock acquisition"). Security's framing was more precise — the lock ordering is the root concern. Redundancy ratio: 1 finding out of 8 unique = 12.5%.

Verdict: Approve. The two MEDIUM findings have been fixed. Remaining LOW/INFO items are acceptable trade-offs for a desktop application.

_{🤖 Co-authored by Claudius the Magnificent AI Agent}

🔍 Audit Summary — PR #650

Reviewed by: Claude Code with a 2-agent team:

• security-engineer (opus) — concurrency safety, error handling, CWE/OWASP classification, dependency research
• rust-developer (sonnet) — idiomatic Rust, lock patterns, match exhaustiveness, clippy concerns

Overall Assessment

Clean, well-scoped PR that fills a real UX gap. No critical or high-severity issues. The concurrency model is sound, match arms are exhaustive, and the error state lifecycle (create → display → cleanup) is handled correctly across all three touchpoints (manager, connection status, UI).

Findings

Pre-existing / Out-of-scope

• Silent lock poisoning (.lock().ok() / .write().ok() pattern): Used throughout the codebase. Not introduced by this PR, but new instances are added. Consider logging warnings on poisoned locks in a future cleanup.

Positive Observations

• ✅ Lock ordering documented in progress watcher (status → release → last_error)
• ✅ Error state properly cleared on start/stop/reset (3 cleanup paths)
• ✅ Let-chains are stable under edition 2024 — no nightly features
• ✅ All match on OverallConnectionState are exhaustive (including network_chooser_screen.rs)
• ✅ No dependency vulnerabilities found (dash-spv, egui 0.33, std sync primitives)

_{🤖 Reviewed by Claudius the Magnificent AI Agent}

🔍 Re-Audit Summary — PR #650 (Round 2)

Reviewed by: Claude Code with a 2-agent team:

• security-engineer (opus) — concurrency, CWE/OWASP, dependency research
• rust-developer (sonnet) — idiomatic Rust, code quality, UI correctness

Overall Assessment

All 7 findings from the first review are properly addressed. Security engineer approves for merge. One new MEDIUM found by the Rust reviewer (tooltip inconsistency), plus minor items.

New Findings

Finding #1 Detail

When SpvStatus::Error, the spv_label falls through to the else branch which calls spv_phase_summary(). That function only matches SyncState::Syncing phases — in an error state, no phase is syncing, so it returns the fallback "syncing...". The tooltip would read:

SPV sync error: Sync manager Masternode failed: ...
SPV: syncing...                    ← contradicts the header
DAPI: Available (3/5 endpoints)

Fix: Add an explicit branch for SpvStatus::Error returning "SPV: Error".

Verification of Previous Fixes

Positive Observations

• ✅ Lock ordering discipline consistent across both handlers
• ✅ Cow<str> usage is clean and idiomatic
• ✅ failed_manager_name() is sound with is_ok_and() guards
• ✅ Mutex rationale comment prevents future "just use RwLock" instinct
• ✅ No dependency vulnerabilities found

Redundancy ratio: 0/5 new findings overlapped between agents (disjoint focus areas this round).

_{🤖 Reviewed by Claudius the Magnificent AI Agent}