[vadymhimself]

Summary

• aggregateAttemptUsage summed cachedInputTokens and cacheReadInputTokens independently. Anthropic usage sets both fields; an OpenAI-shaped attempt sets only cachedInputTokens. Row-level readers take cacheReadInputTokens ?? cachedInputTokens (request-log.ts, management/shared.ts), so a row aggregating an Anthropic leg (60 read) and an OpenAI-shaped leg (40 cached) reported 60 cache reads instead of 100. Cost is priced per attempt (computeEntryCost), so this is row telemetry only, not money.
• Once any attempt reports cacheReadInputTokens, the aggregate's read field now counts each attempt's cacheReadInputTokens ?? cachedInputTokens. cachedInputTokens is summed as before, and rows whose attempts never report the read field are unchanged.
• Only src/server/request-log.ts changes (+4/-1).

Verification

• New test cache reads sum across attempts that report them under different fields in tests/usage/request-log-attempt-identity.test.ts, run before the src change: 1 fail ("cacheReadInputTokens": 60 where 100 was expected). After: bun test tests/usage/ -> 1184 pass, 0 fail.
• bun x tsc --noEmit -> exit 0. bun scripts/file-size-ratchet.ts -> passed.
• bun run test:changed (Bun 1.4.3 via OCX_TEST_RUNNER_BUN, OCX_TEST_MAIN_TIMEOUT_MS=2400000 on a loaded machine) -> 16940 pass, 34 skip, 6 fail across 692 files. Four failures stalled for about 946 s in a machine-wide pause and a fifth (responses-send-budget-counts, 1.3 s) flaked under load; all pass alone (github-copilot-auto-runtime, responses-send-budget-counts, server-auth: 208 pass, 0 fail; messages-native: 102 pass, 0 fail). The sixth, tests/cli/cli-connect-readiness.test.ts "a rejected preferred runtime falls back without rewriting the saved selection", also fails on an unmodified upstream/dev 8640c2f checkout on this machine (local-environment dependent) and is unrelated to usage logging.
• Full bun run test was not run locally: test:changed already covered the changed module's import graph; the remainder is left to CI.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed. (No docs change needed: usage aggregation only.)
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults. (No secrets or auth behaviour touched.)

Source: carried from the vadymhimself fork build (cache-read unification in aggregateAttemptUsage, commit 8fb1bbb), re-authored smaller: cachedInputTokens keeps its own sum, and the fork's other usage changes are not carried here (the status change is #7336).

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Summary by CodeRabbit

• Bug Fixes
  • Cache-read token totals now include cached input reported under different usage fields across attempts, improving the accuracy of aggregated usage counts.
  • Existing behavior is preserved when no attempt reports cache-read input tokens: the aggregate cache-read field remains omitted.

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Maintainers: @lidge-jun @Ingwannu

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📝 Walkthrough

aggregateAttemptUsage now falls back to each attempt’s cachedInputTokens when it lacks cacheReadInputTokens. A test checks aggregation across attempts that report cached tokens under different fields.

Changes: Usage aggregation

Layer / File(s)	Summary
Cached token fallback and test src/server/request-log.ts, tests/usage/request-log-attempt-identity.test.ts	The aggregation uses cachedInputTokens as a fallback for attempts without cacheReadInputTokens, when at least one attempt reports the read-specific field. The test expects both aggregate fields to equal 100 for mixed Anthropic and OpenAI usage data.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to 6bc51

Some mixed-attempt requests can report too many cache reads, but their inspected cost paths remain priceable. This is a bounded reporting issue to fix or accept before merging.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
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.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: summing cache reads across attempts that use different field names. It matches the changes in src/server/request-log.ts and the added regress…

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Explanation

The title clearly and concisely describes the main change: summing cache reads across attempts that use different field names. It matches the changes in src/server/request-log.ts and the added regression test.

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Inline comments:
Review comments at @src/server/request-log.ts:
- Line 1879: Update the cache-read aggregation in the mixed parent aggregate to
recover legacy reads per attempt by subtracting that attempt’s cache-creation
tokens from cachedInputTokens, clamping at zero, when cacheReadInputTokens is
absent. Keep explicit cacheReadInputTokens precedence and leave
cachedInputTokens and cacheCreationInputTokens aggregation unchanged; add a
regression test asserting the aggregate read value.

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📒 Files selected for processing: 2

• src/server/request-log.ts
• tests/usage/request-log-attempt-identity.test.ts

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[Ingwannu]

Intake/scoped review at b2780f521460dd97d7a3d26a2b2a2a893864c7e6.

The mixed-field aggregation uses each attempt's cacheReadInputTokens ?? cachedInputTokens once the explicit field exists, preserving an explicit zero instead of falling through. The regression spans one Anthropic-shaped and one OpenAI-shaped leg. This is a scoped static accounting review; it is not live billing or full retry validation.

Current-head functional workflows are awaiting fork approval; that is pending execution, not a passing test result. No local suite was run for this branch in this intake. No workflow approval, new scan, live configuration change or merge was performed. Required review/readiness gates remain in force.

[lidge-jun]

Landed on dev as part of the dispatch/usage/failover bundle #7389 (squash bddd61f), with Co-authored-by credit. Adaptations are listed in #7389 (ratchet move for #7323/#7373; the Kiro hop is now fenced to the adapter the failed leg actually resolved). Closing as absorbed. Thank you!