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docs(bf-2yu7r): verify JSON-RPC error struct implementation

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Add verification note confirming JsonRpcError struct is already fully
implemented in TH-05-ssrf-block.rs with all acceptance criteria met.

Closes bf-2yu7r.
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jedarden 2026-07-06 16:19:28 -04:00
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# Verification Note for bf-2yu7r: JSON-RPC Error Struct Implementation
## Task
Implement JSON-RPC error struct in TH-05-ssrf-block.rs
## Finding
The `JsonRpcError` struct is **already fully implemented** in the target file at lines 587-599.
## Implementation Details
Location: `/home/coding/pdftract/crates/pdftract-core/tests/TH-05-ssrf-block.rs:587-599`
```rust
/// JSON-RPC 2.0 error object structure.
///
/// Represents the error field in a JSON-RPC response with code, message,
/// and optional data fields.
#[derive(Debug, Clone, serde::Deserialize, serde::Serialize)]
pub struct JsonRpcError {
/// The error code (negative for server errors in the -32099..-32000 range)
pub code: i64,
/// Human-readable error message
pub message: String,
/// Optional additional error data
pub data: Option<serde_json::Value>,
}
```
## Acceptance Criteria Verification
| Criterion | Status | Notes |
|-----------|--------|-------|
| JsonRpcError struct exists with code, message, and optional data fields | **PASS** | All three fields present |
| Struct derives Deserialize and Debug | **PASS** | Derives `Debug, Clone, Deserialize, Serialize` |
| Error struct is used in the JsonRpcResponse error field | **PASS** | Used at line 634: `pub error: Option<JsonRpcError>` |
| Compiles without errors in TH-05-ssrf-block.rs | **PASS** | `cargo check --tests --package pdftract-core --features remote` successful (warnings only) |
## Additional Notes
1. **Field Types**: The `code` field is `i64` (64-bit signed integer), which exceeds the bead specification of `i32 or u32`. This provides wider range for error codes and aligns with the JSON-RPC 2.0 spec which allows numbers beyond 32-bit ranges.
2. **Extra Derives**: The struct also derives `Clone` and `Serialize` (bonus functionality not explicitly requested).
3. **Documentation**: The struct includes comprehensive RustDoc comments explaining the purpose and field semantics.
4. **Integration**: The error struct is fully integrated with:
- `JsonRpcResponse<T>` (line 634)
- `ToolCallResult` enum (line 844)
- Helper functions `is_ssrf_blocked_error()` and `extract_error_info()` (lines 684-732)
5. **Test Coverage**: The module includes unit tests for error parsing at lines 1084-1161 (`mcp_helpers_tests` module).
## Compilation Verification
Command: `cargo check --tests --package pdftract-core --features remote`
Result: ✅ **SUCCESS** - No compilation errors (only unrelated warnings in other modules)
## Conclusion
The JSON-RPC error struct implementation was already complete when this bead was claimed. No code changes were required. The existing implementation fully satisfies all acceptance criteria with additional quality improvements (extra derives, comprehensive documentation, test coverage).