agentydragon(tasks): add task 29 auto-approve empty-array tool invocations

agentydragon/tasks/29-auto-approve-empty-tool-commands.md

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+---
+id: 29
+title: Auto-Approve Empty-Array Tool Invocations
+status: Not started  # one of: Not started, Started, Needs manual review, Done, Cancelled
+summary: Automatically approve tool-use requests where the command array is empty, bypassing the approval prompt.
+goal: |
+  In rare cases the model may emit a tool invocation event with an empty `command: []`.  These invocations cannot succeed and continually trigger errors.  Automatically treat empty-array tool requests as approved (once), suppressing the approval UI, to allow downstream error handling rather than perpetual prompts.
+
+## Acceptance Criteria
+
+- Detect tool requests where `command: []` (no arguments).
+- Do not open the approval prompt for these cases; instead, automatically approve and allow the tool pipeline to proceed (and eventually handle the error).
+- Include a unit test simulating an empty-array tool invocation that verifies no approval prompt is shown and that a `ReviewDecision::Approved` is returned immediately.
+
+## Implementation
+
+**How it was implemented**  
+- In the command-review widget setup (`ApprovalRequest::Exec`), check for `command.is_empty()` before rendering; if empty, directly send `ReviewDecision::Approved` and mark the widget done.
+- Add a Rust unit test for `UserApprovalWidget` to feed an `Exec { command: vec![] }` request and assert automatic approval without rendering the select mode.
+
+## Notes
+
+- This is a pragmatic workaround for spurious empty‑command tool calls; a more robust model‑side fix may replace this later.