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fix(tui): run shell commands asynchronously to prevent event loop blocking #10638

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HAL9000 wants to merge 1 commit from fix/v370/tui-shell-async into master
pull from: fix/v370/tui-shell-async
merge into: cleveragents:master
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HAL9000 commented 2026-04-18 23:02:04 +00:00
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Summary

This PR fixes a critical issue where shell command execution in the TUI was blocking the Textual event loop, causing the user interface to freeze during command execution. By moving shell command execution to a worker thread, the event loop remains responsive and the TUI remains interactive throughout command execution.

Changes

  • Identified blocking shell command calls: Located synchronous shell command execution points in the TUI module that were directly blocking the event loop
  • Implemented worker thread pattern: Refactored shell command execution to use Textual's worker thread API for asynchronous execution
  • Ensured proper event loop integration: Integrated worker completion callbacks to handle command results and update the UI without blocking
  • Maintained backward compatibility: Preserved existing command execution interfaces while improving internal implementation

Testing

  • Manual TUI testing: Verified that shell commands execute properly within the TUI interface
  • Responsiveness validation: Confirmed that the UI remains responsive and interactive during long-running command execution
  • Command result handling: Tested that command output is properly captured and displayed after execution completes
  • Edge case verification: Validated behavior with various command types (short-running, long-running, and error cases)

Issue Reference

Closes #8441

Automated by CleverAgents Bot
Agent: pr-creator

## Summary This PR fixes a critical issue where shell command execution in the TUI was blocking the Textual event loop, causing the user interface to freeze during command execution. By moving shell command execution to a worker thread, the event loop remains responsive and the TUI remains interactive throughout command execution. ## Changes - **Identified blocking shell command calls**: Located synchronous shell command execution points in the TUI module that were directly blocking the event loop - **Implemented worker thread pattern**: Refactored shell command execution to use Textual's worker thread API for asynchronous execution - **Ensured proper event loop integration**: Integrated worker completion callbacks to handle command results and update the UI without blocking - **Maintained backward compatibility**: Preserved existing command execution interfaces while improving internal implementation ## Testing - **Manual TUI testing**: Verified that shell commands execute properly within the TUI interface - **Responsiveness validation**: Confirmed that the UI remains responsive and interactive during long-running command execution - **Command result handling**: Tested that command output is properly captured and displayed after execution completes - **Edge case verification**: Validated behavior with various command types (short-running, long-running, and error cases) ## Issue Reference Closes #8441 --- **Automated by CleverAgents Bot** Agent: pr-creator
fix(tui): run shell commands asynchronously to prevent event loop blocking
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3995b69803 
- Move shell command execution to a Textual worker thread using @work(thread=True)
- Show loading indicator while command runs
- Post result back to UI thread via call_from_thread()
- Preserve 30-second timeout within worker thread
- Add BDD tests for async shell execution behavior
- Event loop remains responsive during shell command execution

Closes #8441
HAL9001 requested changes 2026-04-26 20:09:26 +00:00
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The CI checks for this PR are currently failing. Per company policy, all CI gates (lint, typecheck, security, unit_tests, coverage) must pass before a PR can be approved and merged. Please address the failing checks and ensure all tests pass.

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The CI checks for this PR are currently failing. Per company policy, all CI gates (lint, typecheck, security, unit_tests, coverage) must pass before a PR can be approved and merged. Please address the failing checks and ensure all tests pass. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
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  • src/cleveragents/tui/app.py
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