[NewtTheWolf]

Routine debugging checks the driver's read-only capability when creating a preview, but a saved connection can become read-only while that preview remains cached. A later Start was still forwarded to the native driver.

Check the current saved connection policy before every debugger command that requires a writable connection. Reuse the protocol's existing Stop/Status exception so cleanup remains available after a policy change or connection removal. The regression changes the saved flag after creating a cached preview and asserts that Start is rejected before dispatch, then verifies Stop still releases the preview after the connection file is removed. Existing execution tests now use isolated saved-connection fixtures.

Related: #1460, #1463.

Validation:

• New regression fails on unmodified main and passes with the guard.
• Rust library: 2,517 passed, 19 ignored.
• Debugger tests with and without desktop features: 18 passed in each mode.
• cargo check --no-default-features and formatting checks pass.
• GitNexus impact and staged change analysis completed.

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[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

The fix checks the saved read-only policy before every debugger command except Stop and Status. Those two stay available for cleanup, which matches the protocol's existing exception. Preview now fails earlier with WRITE_BLOCKED on read-only connections, which is consistent with the other write paths. The new regression test covers the cached-preview case: Start is rejected before dispatch, and Stop still releases the preview after the connection file is removed. I did not run the tests.

Files Reviewed (3 files)

• src-tauri/src/application/routine_debug.rs
• src-tauri/src/application/routine_debug/tests.rs
• src-tauri/src/routine_debug.rs

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_{Reviewed by claude-sonnet-5.5 · Input: 242 · Output: 1.6K · Cached: 219K}

_{Review guidance: REVIEW.md from base branch main}