[FrankYang0529]

Follow-up for #74075 (comment).

When a task instance starts a new try, Airflow keeps the XComs it already has and lists their keys in ti_context.xcom_keys_to_clear for the runtime to delete. The Python task runner deletes them before it renders templates. The Go runtime never read the field, so a retried Go task still saw the XComs of its previous try. With this change the Go runtime deletes them too, and the retried task no longer sees them.

• RunTask sends a DeleteXCom for each key after it finds the task and before it binds arguments or runs the task.
• If a delete fails, the task does not run. It ends with a RetryTask when should_retry is set and with a FAILED TaskState otherwise.
• dag.If no longer writes {"skipped": []} to skipmixin_key before the condition runs, since the delete now removes the list from an earlier try.

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Was generative AI tooling used to co-author this PR?

• Yes - Claude Code

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[jason810496]

IIRC, the TS and Java SDK runtime didn't respect the xcom_keys_to_clear as well.
Please feel free to raise follow-up PRs for them as well, thanks.

[FrankYang0529]

IIRC, the TS and Java SDK runtime didn't respect the xcom_keys_to_clear as well. Please feel free to raise follow-up PRs for them as well, thanks.

Thanks for the review. Created two follow-up PRs:

• Clear language SDK task XComs in the coordinator when a try starts #74221
• TS SDK: delete XComs listed in xcom_keys_to_clear before a task runs #74220

[jason810496]

Nice, thanks. Except the reusability comment, rest of the change LGTM.