fix(codex): count automatic compaction usage by HenryTeo27 · Pull Request #1805 · ccusage/ccusage

HenryTeo27 · 2026-09-27T04:30:38Z

Summary

Codex session rollouts can store automatic-compaction request usage in token_usage_record, linked by response_id to a compacted event's compaction_response_id. Cumulative token_count snapshots may not include that request usage. A fixed-window audit of retained local logs confirmed this record pattern; private session identifiers and token totals are omitted.

Match usage records and compaction markers in either event order, ignore unmatched records, and count each response ID once.
If a usage record has no model, use the active turn_context as a fallback attribution.
Keep response-ID deduplication consistent across report modes; Session reports attribute a duplicate to the first event encountered.
Document that missing local records cannot reconstruct account-side totals, and that the gpt-reserve alias affects cost lookup rather than token totals.

This can recover compaction usage persisted in local logs; it does not promise exact parity with Codex account totals or infer an undisclosed backend model.

Validation

git diff --check passed.
Added a Session-report regression test for duplicate response IDs.
Rust tests were not run locally because direnv is unavailable; GitHub Actions are currently awaiting maintainer approval.

Clarify that the GPT Reserve alias changes cost lookup only, not reported token totals.

coderabbitai · 2026-09-27T04:30:59Z

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Reviewing files that changed from the base of the PR and between 81d5655 and 53567ac.

📒 Files selected for processing (1)

rust/adapters/codex/src/aggregate.rs

🚧 Files skipped from review as they are similar to previous changes (1)

rust/adapters/codex/src/aggregate.rs

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📝 Walkthrough

Walkthrough

Codex parsing now pairs compaction usage records with matching markers. Response IDs support deduplication during loading and aggregation. The guide clarifies how local reports, account totals, timezones, and model-based pricing relate.

Changes

Codex usage records and deduplication

Layer / File(s)	Summary
Parse compaction usage records `rust/adapters/codex/src/types.rs`, `rust/adapters/codex/src/parser.rs`, `docs/guide/codex/index.md`	Codex payloads and events now carry optional response IDs. The parser recognizes compaction markers and usage records, matches them by response ID, and emits valid usage records when a matching marker exists. The guide describes matching, model inference, local reporting, and cases that cannot be reconstructed.
Deduplicate loaded events `rust/adapters/codex/src/loader.rs`	The loader uses response IDs as deduplication keys when available. Events without response IDs keep the existing timestamp, model, and token-count key.
Retain first-event usage during aggregation `rust/adapters/codex/src/aggregate.rs`, `rust/adapters/codex/src/lib.rs`, `rust/crates/ccusage/src/main.rs`	Aggregation skips repeated response IDs and retains the first event’s timestamp and usage bucket. Tests cover deduplication, aggregate totals, and session attribution.

Priority: ⬇️ Low

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

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant SessionParser
  participant EventLoader
  participant EventAggregator
  SessionParser->>EventLoader: Emit matched compaction usage event
  EventLoader->>EventAggregator: Provide loaded events
  EventAggregator->>EventAggregator: Retain first event for each response ID

Merge Risk: ⚪ Minimal · up to 53567

No concrete issue remains that needs resolution before merging; normal checks still apply.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 81d56

The changes are confined to local usage reporting, with no verified security finding. Two identity-matching cases could omit usage from reports, but their practical occurrence and any security-sensitive downstream use are not established.

Retained concerns

Low · architecture · inferred: Response ID alone is the deduplication identity across loaded source groups. If independent sessions or roots produce the same ID, the later event is discarded even when its model and usage differ; uniqueness across those roots is not established.
Low · architecture · inferred: New compaction usage events enter parent-history replay filtering, which compares token totals but not response identity. A distinct child response with totals matching the next parent entry can therefore be treated as replayed history and omitted.

Security review details

Security Blast Radius

inferred — The demonstrated effect is bounded to Codex usage events and their local reports, though one deduplication pass can span multiple configured source groups and sessions.

Trust Boundaries and Controls

observed — Session-log payloads supply the response IDs and usage values. The parser rejects blank IDs and missing or zero usage, but the available evidence does not establish who may write those logs.

Resilience and Maintainability Implications

inferred — First-event retention and totals-only replay matching make accurate event ownership depend on ID uniqueness and replay ordering; neither condition is a verified security-control failure.

Hardening Proposals

proposed — Establish the response-ID uniqueness scope before using it across source roots, and distinguish response identity when deciding whether a child event belongs to replayed parent history.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 63.89% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main production change: counting automatic compaction usage in Codex data.

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github-actions · 2026-09-27T04:33:01Z

Pullfrog contribution-gate review

Docs-only PR adds in-scope clarification that Codex reports come from local logs and differ from account-wide aggregates, plus timezone and pricing alias notes. No spam, duplicate, or malicious signals.

Decision: left open for maintainer review.

pullfrog

ℹ️ No critical issues — one link-usability suggestion inline.

Reviewed changes
Reviewed the single docs commit (322ffe0) touching docs/guide/codex/index.md.

Local-vs-account boundary section: states Codex reports are rebuilt from local session JSONL, ccusage never queries the account-level usage service, and account totals are aggregate-only with no per-model breakdown.
Timezone scope note: --timezone affects only local grouping, and the account daily startDate carries no documented timezone.
gpt-reserve pricing clarification: the alias resolves to gpt-5.6-luna for cost lookup only, with no change to token totals.

I verified the load-bearing claims: upstream account.rs exposes only lifetime_tokens/peak_daily_tokens/streaks plus {start_date, tokens} daily buckets (no per-model fields on the account-wide path), common.rs maps GetAccountTokenUsage to account/usage/read, the Codex adapter has no account-service client, and pricing_alias("gpt-reserve") plus its test confirm the pricing-only claim.

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HenryTeo27 · 2026-09-27T04:36:53Z

@coderabbitai @cubic-dev-ai Please review this documentation-only PR. The fixed-window audit did not establish a deterministic parser omission, so this change clarifies source boundaries rather than claiming token reconciliation. Maintainers, please review when convenient; no personal usage totals are included.

cubic-dev-ai · 2026-09-27T04:37:02Z

@coderabbitai @cubic-dev-ai Please review this documentation-only PR. The fixed-window audit did not establish a deterministic parser omission, so this change clarifies source boundaries rather than claiming token reconciliation. Maintainers, please review when convenient; no personal usage totals are included.

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coderabbitai · 2026-09-27T04:37:08Z

@HenryTeo27, I’ll review the documentation changes in #1805. I’ll check that the guide distinguishes local usage from account-wide totals without claiming token reconciliation.

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All reported issues were addressed across 1 file

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Pin both upstream protocol links to Codex commit 814de47 and anchor them to the response type and method declaration.

pullfrog

✅ No new issues found.

Prior link-usability feedback is addressed cleanly and the pinned anchors check out.

Reviewed changes
Reviewed the delta since the prior pullfrog review (322ffe0 → 911d747).

Pinned Codex protocol links: both account/usage/read references now point at Codex commit 814de47 with line anchors instead of blob/main.

I verified both anchors live against the pinned commit: account.rs#L448 is the GetAccountTokenUsageResponse struct and common.rs#L1321 is the GetAccountTokenUsage => "account/usage/read" mapping. Docs-only change with no behavioral surface.

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…n-usage-reconciliation

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Actionable comments posted: 1

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Inline comments:
Review comments at @rust/adapters/codex/src/aggregate.rs:
- Around line 638-690: Add a fixture-backed Session-report regression test
around aggregate_events with the same response ID present in events from two
sessions. Assert that the response is attributed only to the first session,
matching codex_event_key’s cross-session response-ID deduplication behavior.

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📥 Commits

Reviewing files that changed from the base of the PR and between 911d747 and 81d5655.

📒 Files selected for processing (7)

docs/guide/codex/index.md
rust/adapters/codex/src/aggregate.rs
rust/adapters/codex/src/lib.rs
rust/adapters/codex/src/loader.rs
rust/adapters/codex/src/parser.rs
rust/adapters/codex/src/types.rs
rust/crates/ccusage/src/main.rs

🚧 Files skipped from review as they are similar to previous changes (1)

docs/guide/codex/index.md

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pullfrog

✅ No new issues found.

Reviewed changes
Reviewed the delta since the prior pullfrog review (911d747 → 81d5655), which adds Codex automatic-compaction usage counting alongside the earlier docs clarification.

Counted compaction usage from token_usage_record events only when the response ID matches a compacted event, with order-independent matching and first-record-wins dedupe.
Deduped compaction usage by response ID across sessions, models, and files at the parser, loader, and aggregation layers, keeping the first event.
Attributed model-less usage records to the surrounding turn_context as fallback and extended the docs Token deltas note to describe the new behavior.

I traced the new paths end to end: parser emits in both record-first and compacted-first orders and drops zero-token, timestamp-less, and unlinked records; the loader Response(id) key, the aggregate key zeroing, and the aggregate_events set all keep the first event consistently; recorded-usage snapshots preserve the existing bucket semantics. The new tests assert exact totals and counts, so they can fail. cargo test could not run in this environment because the ccusage-core build script requires a LiteLLM pricing snapshot.

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pullfrog

✅ No new issues found.

Reviewed changes
Reviewed the delta since the prior pullfrog review (81d5655 → 53567ac).

Added a session-kind test proving a duplicate response ID is attributed to the first session only.

The new test pins first-wins session attribution with exact totals (session-a keeps 1_000_000, session-b absent), consistent with the dedupe behavior reviewed in the prior pass. Test-only change with no behavioral surface.

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HenryTeo27 · 2026-09-27T21:41:07Z

@coderabbitai @cubic-dev-ai Please review the latest pushed commit 53567ac. It adds the requested Session-report regression test for duplicate response IDs across sessions. Local git diff --check passes; Rust tests were not run because direnv is unavailable. GitHub currently shows four Actions workflows awaiting maintainer approval.

cubic-dev-ai · 2026-09-27T21:41:18Z

@coderabbitai @cubic-dev-ai Please review the latest pushed commit 53567ac. It adds the requested Session-report regression test for duplicate response IDs across sessions. Local git diff --check passes; Rust tests were not run because direnv is unavailable. GitHub currently shows four Actions workflows awaiting maintainer approval.

@HenryTeo27 There are no new changes to review since the last completed review.

coderabbitai · 2026-09-27T21:41:21Z

@HenryTeo27, I’ll review the latest commit, including the Session-report regression test for duplicate response IDs across sessions. I’ll treat the Rust tests and the four pending GitHub Actions workflows as unverified.

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HenryTeo27 · 2026-09-27T21:58:26Z

Maintainers: GitHub currently shows six Actions workflows awaiting approval on this PR. Could someone with maintainer access approve them so validation can run? The Session-report regression test is in 53567acc, and the CodeRabbit thread is resolved.

HenryTeo27 · 2026-09-28T19:22:20Z

Hi @ryoppippi — I saw that #1805 was closed and wanted to ask for feedback so I can understand how to improve it.

The motivation was that ccusage may miss some automatic-compaction usage in Codex’s local logs. I found token_usage_record entries linked to compacted events by response ID, separate from cumulative token_count snapshots. The PR parses matching records, deduplicates them, and adds regression tests and documentation. It does not infer GPT Reserve’s actual backend model or claim full parity with account totals; I have not quantified how much of the overall gap it would recover.

I also could not run the Rust tests locally, and the Actions runs were awaiting maintainer approval. Was the PR closed because of its scope, an implementation concern, or another reason? If a narrower or revised PR would be useful, I’m happy to make changes; otherwise, I’ll leave it closed. Thanks for taking a look.

ryoppippi · 2026-09-28T19:23:14Z

it's too ai slopped. so i'll work on it

* fix(codex): count unreported compaction usage Match token_usage_record responses to compacted markers and add usage omitted from Codex's cumulative token counts. Suppress records already covered by an advancing snapshot so local compaction stays counted once. Deduplicate response IDs across copied sessions, including parents outside the report's date range, and preserve deterministic attribution and speed tier merging in serial and parallel aggregation. Rework the contribution from #1805 for the current adapter. Co-authored-by: Henry Teo <[email protected]> * fix(codex): parse usage records with JSON whitespace Allow the line classifier to fall back to its whitespace-aware scan for turn contexts and nested token counts with spaces after type colons. This prevents valid JSONL from silently omitting normal request usage when calculating totals alongside compaction records. * fix(codex): retain counted compaction IDs in replay history Keep matched parent response IDs independently of usage emission, so a retained child log missing the intervening cumulative snapshot cannot count an already-accounted compaction again in a date-bounded report. Collect identities during the existing parent pass. Normal report parsing does not allocate the optional history map, and ordinary replay matching continues to use only token-count deltas. Add a regression covering the loader and serial/parallel reports with a missing child snapshot. This addresses Cubic's review finding on #1821. * fix(codex): preserve valid pending usage across invalid records Keep the latest valid response ID when an invalid or already-accounted record is ignored. Clearing it before validation prevented cumulative snapshots from consuming the pending compaction usage and counted it twice. Add exact-total regressions for missing IDs, timestamps, empty usage, and duplicate completed responses. This addresses Pullfrog's review on #1821. * docs(codex): clarify duplicate compaction attribution --------- Co-authored-by: Henry Teo <[email protected]>

docs(codex): clarify account and local usage totals

322ffe0

Clarify that the GPT Reserve alias changes cost lookup only, not reported token totals.

cubic-dev-ai Bot reviewed Sep 27, 2026

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pullfrog Bot reviewed Sep 27, 2026

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Comment thread docs/guide/codex/index.md Resolved

cubic-dev-ai Bot reviewed Sep 27, 2026

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Comment thread docs/guide/codex/index.md Resolved

docs(codex): pin Codex protocol links

911d747

Pin both upstream protocol links to Codex commit 814de47 and anchor them to the response type and method declaration.

pullfrog Bot reviewed Sep 27, 2026

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HenryTeo27 added 3 commits September 27, 2026 14:02

Merge remote-tracking branch 'origin/main' into codex/codex-compactio…

4a02495

…n-usage-reconciliation

fix(codex): count automatic compaction usage

42db97e

Merge remote-tracking branch 'origin/main' into codex/codex-compactio…

81d5655

…n-usage-reconciliation

coderabbitai Bot reviewed Sep 27, 2026

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Comment thread rust/adapters/codex/src/aggregate.rs Resolved

test(codex): cover session response deduplication

53567ac

pullfrog Bot reviewed Sep 27, 2026

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HenryTeo27 changed the title ~~docs(codex): clarify account and local usage totals~~ fix(codex): count automatic compaction usage Sep 27, 2026

ryoppippi closed this Sep 28, 2026

ryoppippi mentioned this pull request Oct 2, 2026

fix(codex): count unreported compaction usage #1821

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Walkthrough

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Sequence Diagram(s)

Security Architecture Review

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