fix(delegation): honor configured API mode

[visualfox-ch]

Summary

• honor the configured delegation API mode instead of resolving it from unrelated runtime state
• keep provider-specific delegation routing deterministic
• add regression coverage for the configured mode path

Test plan

• python -m pytest tests/tools/test_delegate.py -q -o 'addopts='
• ruff check tools/delegate_tool.py tests/tools/test_delegate.py

Split from and supersedes the delegation portion of #50894.

[visualfox-ch]

@teknium1 @OutThisLife Could you please approve the external-fork Actions runs for this focused PR set? All eight PRs are currently mergeable, but every run is action_required with zero jobs, so no CI code has executed yet.

• fix(delegation): honor configured API mode #64470 — https://github.com/NousResearch/hermes-agent/actions/runs/29342954390
• feat: add privacy-preserving runtime telemetry #64472 — https://github.com/NousResearch/hermes-agent/actions/runs/29342994399
• fix(telegram): accept scalar allowlist configuration #64473 — https://github.com/NousResearch/hermes-agent/actions/runs/29343024338
• fix(cron): classify no-agent failures as script errors #64474 — https://github.com/NousResearch/hermes-agent/actions/runs/29343072191
• fix(cli): keep approval prompts visible in scrollback #64475 — https://github.com/NousResearch/hermes-agent/actions/runs/29343110646
• feat(delegation): gate variable-cost routes #64476 — https://github.com/NousResearch/hermes-agent/actions/runs/29343159275
• fix(checkpoints): remove files added after restore target #64477 — https://github.com/NousResearch/hermes-agent/actions/runs/29343222564
• fix(cli): report update and OAuth status accurately #64478 — https://github.com/NousResearch/hermes-agent/actions/runs/29343544438

The changes were split deliberately to keep review and rollback scope small. Local focused tests and lint checks passed before submission. No merge is requested before upstream CI and review.

[tonydwb]

Code Review Summary

Verdict: Approved

Fix to make delegation honor configured API mode. Small (38 additions, 1 deletion). No security concerns.

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Reviewed by Hermes Agent

[teknium1]

Thanks for isolating the provider-based delegation gap; current main does ignore delegation.api_mode after resolving provider credentials (tools/delegate_tool.py:3161).

Problems

• tools/delegate_tool.py:3148 overwrites every resolved provider mode. That bypasses provider-specific transport rules: xAI is explicitly forced to codex_responses in hermes_cli/runtime_provider.py:1490-1491, so a delegation config of chat_completions could route an xAI child onto the wrong wire protocol.

Suggested changes

• Apply the delegation override through provider-aware runtime resolution, preserving providers whose transport is fixed by their resolver branch. Add a regression test for a fixed-mode provider alongside the Copilot override case.

This is an automated hermes-sweeper review.

[teknium1]

This unconditional override also affects providers whose runtime intentionally fixes the transport. For example, resolve_runtime_provider() forces xAI to codex_responses; allowing delegation.api_mode=chat_completions here would construct an incompatible child. Please make this provider-aware and add a fixed-mode regression case.