[jarvis9443]

The UsageEvent's total_tokens is supposed to be the total the upstream itself reported, stored as received and never computed by the gateway. Only the chat family honoured that. Every other endpoint built its event without the field, so a POST /v1/embeddings against OpenAI (usage: {prompt_tokens: 1, total_tokens: 1}) landed with total_tokens null, and so did every realtime session.

The fix reads the upstream's own usage.total_tokens through one helper, usage_attr::reported_total_tokens, and threads it to the event on each family that dropped it:

• /v1/embeddings: EmbeddingUsage gets an internal upstream_total_tokens. The OpenAI wire fills it from the reported total. The Bedrock and Vertex bridges fill the client-facing total_tokens from the prompt count (their upstreams report no total), so they leave it at 0 and the event stays unset.
• /v1/rerank, whose prompt count and total now come from one reader (rerank_usage) shared with passthrough metering
• /v1/audio/transcriptions and /translations, both the buffered reply and the streamed relay. Image and audio usage now travel as UsageStats instead of a (prompt, completion, modality) tuple, so the total rides along.
• /v1/images/generations and /v1/images/edits
• /v1/realtime: summed over the session's response.done and token-typed transcription frames. The total is kept only if every frame that counted tokens reported one; a cancelled response's empty usage neither adds to it nor breaks it. The rule lives in usage_attr::ReportedTotalSum.
• Completed-batch attribution: summed over the output lines under the same rule, through the same accumulator.
• Passthrough routes metered as embeddings, rerank or images.

Chat completions, completions, /v1/messages, /v1/responses (native and bridged) and decisions already carried it; the new e2e drives them too as a guard. count_tokens, video submission, the jobs management calls, MCP/A2A and the client-cancel events record no tokens at all, so they have no total to carry. /v1/audio/speech records no tokens either, including the SSE stream_format whose terminal event does report usage. Adding token accounting there would change what speech bills, so it is left out of this fix.

Behavior change: after upgrading, usage rows for the families above carry total_tokens whenever the upstream reported one. Nothing changes in client responses, rate-limit commits or Prometheus counters, and no configuration needs editing.

Test: usage-total-tokens-every-family-e2e drives every family against mocks whose reported total is deliberately not the sum of the counters beside it, and different per family. It asserts each emitted UsageEvent (read from a mock SLS exporter) carries that exact total. It also has an embeddings upstream that reports none, which must leave the field unset. Against the previous build, all twelve fixed cases came back without a total, while chat/responses/messages passed. Three passthrough unit expectations that had pinned the missing total are updated.

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⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Essentials
• Run ID: 3c12b958-7f3f-40c9-9d9b-d8ab98809113

📥 Commits

Reviewing files that changed from the base of the PR and between 174d94b and 88751b2.

📒 Files selected for processing: 8

• crates/aisix-proxy/src/audio.rs
• crates/aisix-proxy/src/images.rs
• crates/aisix-proxy/src/images_edits.rs
• crates/aisix-proxy/src/jobs.rs
• crates/aisix-proxy/src/passthrough_route.rs
• crates/aisix-proxy/src/realtime.rs
• crates/aisix-proxy/src/rerank.rs
• crates/aisix-proxy/src/usage_attr.rs

📝 Walkthrough

The change carries upstream-reported total_tokens through embedding, audio, image, rerank, realtime, and batch usage reporting. Request handlers use structured usage statistics where applicable. An end-to-end test checks reported totals across these routes.

Changes: Usage Total Token Reporting

Layer / File(s)	Summary
Usage data and parsing contract CLAUDE.md, crates/aisix-gateway/src/chat.rs, crates/aisix-provider-*/..., crates/aisix-proxy/src/usage_attr.rs	EmbeddingUsage stores the upstream total separately from the client-facing total. Provider bridges set or preserve the value. The usage parser reads reported totals, returning zero when absent or invalid and capping large values.
Structured audio and image usage crates/aisix-proxy/src/audio.rs, crates/aisix-proxy/src/images*.rs	Audio, image, and image-edit handlers pass structured UsageStats through usage-event emission. Reservation and metric token counts derive from the structured values.
Embedding and rerank usage events crates/aisix-proxy/src/embeddings.rs, crates/aisix-proxy/src/rerank.rs, crates/aisix-proxy/src/passthrough_route.rs	Embedding and rerank usage events preserve upstream totals. Passthrough rerank usage and embedding and image usage expectations include reported totals.
Realtime and batch aggregation crates/aisix-proxy/src/realtime.rs, crates/aisix-proxy/src/jobs.rs	Realtime and batch usage sum reported totals. An aggregate reports zero if any contributing frame or line lacks a total; available sums are capped at u32::MAX.
End-to-end usage coverage tests/e2e/src/cases/usage-total-tokens-every-family-e2e.test.ts	The test checks upstream-reported totals across usage families, including an omitted embedding total and summed batch totals.

Priority: ⚪ Pending latest changes

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Suggested reviewers: moonming

Merge Risk: 🟡 Moderate · up to 174d9

Realtime sessions that include a cancelled or usage-less response can record zero total tokens instead of the upstream-reported total. Fix this before merging; the rest of the change looks sound.

Pre-merge checks: 5 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
E2e Test Quality Review		The new E2E test exercises the real gateway-to-upstream-to-SLS flow and covers the main route families. However, it does not cover the critical mixed-reporting aggregation case: runRealtimeSession r…	Add E2E cases where one realtime usage frame and one batch output line omit total_tokens, while another contributor reports it; assert that each aggregate event leaves total_tokens unset. Also exercise /v1/audio/translations with an u…

Passed checks: 5 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly summarizes the main change: recording upstream-reported total_tokens across endpoint families.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Security Check		No security-check failure is introduced by this PR. The diff adds propagation of a numeric u32 usage count into UsageEvent.total_tokens (crates/aisix-obs/src/usage.rs:246-252); it does not add a…

Full details: Security Check

Explanation

No security-check failure is introduced by this PR. The diff adds propagation of a numeric u32 usage count into UsageEvent.total_tokens (crates/aisix-obs/src/usage.rs:246-252); it does not add authentication credentials or request content to events. The new embedding field is skipped during serialization (crates/aisix-gateway/src/chat.rs), and the added credential strings are mock values in the E2E test setup only. 1. Sensitive data exposure: No issues found. The production changes carry token counts, not bearer/API credentials, secrets, headers, or body content. 2. Unencrypted database secrets: No issues found. The diff adds no secret-bearing persistence or schema changes. 3. Authorization bypass: No issues found. The diff changes no authorization checks or mutating endpoint handlers. 4. Cross-resource access: No issues found. The diff adds no resource lookup or ownership behavior. 5. TLS/cryptographic configuration: No issues found. The diff changes no TLS or cryptographic settings. 6. Resource isolation: No issues found. The diff adds no shared-resource binding, deletion, or cascade behavior. 7. Secret reference resolution: No issues found. The mock E2E secret values are test setup; production secret resolution is unchanged.

Full details: E2e Test Quality Review

Explanation

The new E2E test exercises the real gateway-to-upstream-to-SLS flow and covers the main route families. However, it does not cover the critical mixed-reporting aggregation case: runRealtimeSession receives one response.done frame (lines 400–417), and the batch mock’s two output lines both report totals (lines 127–140). Therefore, the test does not verify that realtime and batch events omit the total when any contributor lacks one, despite this being part of the changed behavior. The test also does not exercise /v1/audio/translations.

Resolution

Add E2E cases where one realtime usage frame and one batch output line omit total_tokens, while another contributor reports it; assert that each aggregate event leaves total_tokens unset. Also exercise /v1/audio/translations with an upstream-reported total and assert the emitted usage event preserves it.

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Actionable comments posted: 1

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Inline comments:
Review comments at @crates/aisix-proxy/src/realtime.rs:
- Line 743: Update the response completion handling around absorb_total so it is
called only when response.usage is present, preserving the previously reported
session total when usage is absent. Continue passing present usage reports
through absorb_total unchanged, including reports missing total_tokens so they
remain marked unreported.

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• Configuration used: Organization UI
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📥 Commits

Reviewing files that changed from the base of the PR and between f9b73cd and 174d94b.

📒 Files selected for processing: 15

• CLAUDE.md
• crates/aisix-gateway/src/chat.rs
• crates/aisix-provider-bedrock/src/bridge.rs
• crates/aisix-provider-openai/src/wire.rs
• crates/aisix-provider-vertex/src/bridge.rs
• crates/aisix-proxy/src/audio.rs
• crates/aisix-proxy/src/embeddings.rs
• crates/aisix-proxy/src/images.rs
• crates/aisix-proxy/src/images_edits.rs
• crates/aisix-proxy/src/jobs.rs
• crates/aisix-proxy/src/passthrough_route.rs
• crates/aisix-proxy/src/realtime.rs
• crates/aisix-proxy/src/rerank.rs
• crates/aisix-proxy/src/usage_attr.rs
• tests/e2e/src/cases/usage-total-tokens-every-family-e2e.test.ts

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