[mzxchandra]

Summary

Agent workflow tools return internal child execution spans alongside their final result. Passing those spans into the next model request can exhaust the context window or make secret projection withhold an otherwise small, usable result.

Remove executor-owned child trace metadata from the model-facing copy before secret projection, including canonical workflow tools selected through wire aliases and replayed tool responses. Preserve the raw response for traces, billing and execution records. Nested business fields and unrelated tools are unchanged; secret checks still apply to all functional output.

Type of Change

• Bug fix

Testing

• Regression first: three new cases fail on the original code (large traces with/without secret projection, and legacy replay).
• 66 tests pass across provider runtime context, workflow tool runner and Agent turn session.
• A 17 MiB diagnostic trace no longer prevents a small final result from reaching the model; a resolved secret in that final result remains redacted.
• Focused Biome and git diff --check pass.
• Full repository checks left to hosted CI. Deployed staging and production checks are NOT RUN.

Rollout verification

No schema or created-before default changes. Before/after deployed verification should use the same synthetic child workflow with a large intermediate payload and a tiny final output, checking model consumption, retained activity traces, secret redaction and unchanged child billing. A replay must not execute or charge the child again. Existing persisted chat history is not rewritten.

This fixes diagnostic transport, not oversized business results or the need for bounded/paged tool contracts.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced (hosted CI pending)
• Contributor License Agreement confirmation by author

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Oct 23, 2026 1:02am UTC