Return ordinary tool exceptions as paired error results so the model can decide how to recover. Preserve cancellation, existing recovery guidance, and failed tool activities without adding automatic retries or retry limits.
Validate all three text protocols with real process execution and cover bounded errors and cancellation. Focused tests: 161 passed, 1 skipped; typecheck and lint passed. Full suite: 6230 passed, 87 skipped, 1 Obsidian temporary-directory assertion failed.
Release note: Direct-model conversations can continue after a tool fails, allowing the model to use the reported error to choose its next step.
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