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fix(observability): correlate Responses tool calls in ATIF - #887
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WalkthroughTool-call extraction now records payload origin and applies provider-specific identifier precedence for generic, OpenAI Chat, OpenAI Responses, and Anthropic Messages formats. Tests cover fallbacks, ordering, and mixed payload selection. ChangesTool-call correlation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This change corrects Responses tool-call correlation so exported tool calls and observations share the semantic invocation ID; no actionable merge-blocking risk remains after normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@crates/core/src/observability/atif.rs`:
- Around line 1239-1244: Update the ToolCallOrigin::Generic and
ToolCallOrigin::AnthropicMessages extraction in the relevant tool-call ID
function to use find_map, so null, empty, and non-string id values continue
searching tool_call_id and call_id for a valid string. Add regression coverage
for each invalid id case with a valid fallback field, preserving the existing
generated ID behavior when no valid ID exists.
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Signed-off-by: Alex Fournier <afournier@nvidia.com>
Signed-off-by: Alex Fournier <afournier@nvidia.com>
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## What does this PR do? Adds a bounded ATIF v1.7 input path to `gym eval reverify`, allowing completed Relay trajectories to be scored by Gym's existing stateless verifier flow without rerunning the agent or policy model. Together, NVIDIA-NeMo#2737 and NVIDIA-NeMo#2767 establish a file-based interoperability path between NeMo Relay and NeMo Gym. Relay-exported ATIF trajectories can be evaluated in Gym, while Gym-native trajectories can be exported to the same ATIF format for downstream consumers. This does not couple the Relay and Gym runtimes or add Relay as a Gym dependency. Relates to NVIDIA-NeMo#2468. ## Before `gym eval reverify` only accepted native Gym rollout JSONL. ATIF contains the external agent trajectory, but not the Gym task, expected answer, verifier configuration, or resources-server routing needed to calculate a reward. ## After ```bash gym eval reverify \ --input-format atif \ --config my_resources_server.yaml \ --inputs materialized-inputs.jsonl \ --atif-manifest relay-trajectories.jsonl \ --output rewards.jsonl ``` The inputs have separate responsibilities: - Materialized Gym inputs provide the task, verifier metadata, request context, and routing. - ATIF provides the completed external-agent output. - The manifest explicitly joins each trajectory to `(_ng_task_index, _ng_rollout_index)` and may pin its SHA-256. Gym projects the supported ATIF output into its existing Responses-shaped verifier payload, calls the normal stateless `/verify` path, and computes aggregate metrics. ## Integration contract Gym consumes the canonical ATIF fields needed to build that bounded scoring payload. It does not reconstruct provider-native payloads stored in optional `extra` metadata; the ATIF producer owns that conversion. `projection_status=complete` means Gym constructed the supported verifier payload without guessing or dropping a field the adapter maps. It does not claim full-document ATIF fidelity, certify the producer's provider-to-ATIF conversion, or interpret arbitrary producer metadata. Persisted source and trajectory hashes retain that provenance. Supported in this initial path: - exact ATIF v1.7 schema and text-only trajectories; - canonical agent text and `reasoning_content`; - generic function calls with exactly one correlated result per call; - standard token usage and supported Relay usage details; - explicit one-to-one trajectory/task joins with optional source-hash verification; and - persisted trajectory ID, session ID, schema version, source hash, and projection status. Standard usage is strict. If any model step reports supported usage, every model-backed step must provide `prompt_tokens` and `completion_tokens`, and `final_metrics` must provide matching totals. Optional cached, reasoning, and reported-total details are projected only when their aggregate can be proven. Partially reported optional details remain unknown rather than being counted as zero. Equivalent Relay reasoning-token aliases are normalized, conflicting aliases are rejected, and cost metadata remains provenance rather than verifier input. The path fails closed on shapes that cannot be mapped without changing what the verifier scores, including: - multimodal, continued, copied-context, or subagent trajectories; - later user or system input after agent output; - aggregated LLM calls or ambiguous message/tool ordering; - incomplete, duplicated, or uncorrelated tool calls and results; and - training token IDs or log probabilities. Optional producer-specific status or provider payloads in `extra` do not change the canonical projection. A trajectory may end after a tool call when every call has a correlated observation result. Tool-bearing ATIF is rejected when routed to a resources server with `expose_tools_over_mcp: true`. ATIF proves generic call/result correlation, but does not carry Gym's canonical MCP `(server_name, tool_name)` identity. ATIF mode requires the verifiers selected by the batch to be stateless and does not support `--force`, `--resume`, `--judge-failed-only`, or `--append`. Native Gym reverification remains the default. This adds no Relay, NeMo Agent Toolkit, or Harbor runtime dependency. ## Suggested review order Most of the added lines are qualification tests and fixtures. The maintainer-facing behavior is concentrated in these areas: | Review area | Files | What to verify | | --- | --- | --- | | Strict ATIF boundary | `nemo_gym/atif_v1_7.py`, `nemo_gym/atif_json.py` | Exact v1.7/schema and lossless JSON rules | | Projection | `nemo_gym/atif_reverification.py` | Supported trajectory mapping, usage semantics, identity, and fail-closed boundaries | | Gym integration | `nemo_gym/rollout_reverification.py` | Selected-route preflight and reuse of the existing stateless verifier path | | Wiring and evidence | CLI, docs, fixtures, and tests | User-facing contract and regression coverage | Suggested pass: review the boundary first, then projection, then the small Gym integration. The remaining files document and prove that contract. ## Validation - Focused ATIF projection, rollout-reverification, and CLI suites: **491 passed**. - Changed-file pre-commit and `git diff --check`: passed. - Fixture tests prove reward equivalence between native and projected responses and show that the same ATIF trajectory can be rescored with a second stateless verifier. - The live Codex CLI → Relay → ATIF → Gym check executed a real tool call, preserved `function_call → function_call_output → message`, and returned reward `1.0` with aggregate accuracy `100%`. The broader local unit run reported the same five failures in both ATIF worktrees, all outside the affected paths: sandbox port binding, existing `aime24` metadata, macOS `/proc` behavior, system Python missing `aiohttp`, and sandbox semaphore permissions. The affected suites pass. ## Related work - NVIDIA-NeMo#2468 tracks ATIF input for Gym reverification. - NVIDIA/NeMo-Relay#887 fixes Responses tool-call correlation. - NVIDIA-NeMo#2673 covers Gym-native structured MCP tool identity and is complementary to this PR. ## Checklist - [x] I have read the contributing guidelines. - [x] The change is focused and adds no unrelated runtime dependency. - [x] Tests and documentation were added. - [x] Changed-file pre-commit checks pass. - [x] Commits include DCO sign-off. --------- Signed-off-by: Alex Fournier <afournier@nvidia.com>
Overview
Fixes ATIF tool-result correlation for OpenAI Responses function calls.
OpenAI Responses uses two different identifiers on a function-call output item:
ididentifies the response item (fc_*), whilecall_ididentifies the tool invocation and is reused byfunction_call_output. The exporter previously selectedidfirst, so Relay could emit the agent tool call asfc_*while the corresponding tool observation usedcall-*. That left a valid result orphaned in the exported trajectory.Details
call_id, thenid, thentool_call_idonly for Responses function-call items.id, thentool_call_id, thencall_idprecedence for Chat, Anthropic, and generic payloads while allowing null, empty, and non-string values to fall through to a valid fallback.call_idvalues.This changes a conforming Responses ATIF
tool_call_idfrom the response-itemfc_*ID to the semanticcall-*invocation ID. That is the intended corrective behavior and allowsStep.tool_calls[].tool_call_idto matchStep.observation.results[].source_call_id.Validation
cargo test -p nemo-relay --lib observability::atif::tests— 102 passedcargo clippy -p nemo-relay --all-targets --all-features -- -D warningscargo fmt --all -- --checkjust test-rust— full workspace, FFI serial pass, doctests, and Rust examples passedid=fc_*, while both exported tool call and observation used the samecall-*IDWhere should the reviewer start?
Start with
extract_tool_callsandtool_call_id_for_originincrates/core/src/observability/atif.rs, then the realistic Responses regression intest_exporter_openai_responses_function_calls_promoted_and_correlated.Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)
Summary by CodeRabbit
New Features
Bug Fixes
Documentation