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fix(pricing): validate ETag cache refreshes - #1672
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Add gzip-aware per-user HTTP caching with atomic body and ETag replacement. Reuse cached pricing only after a matching 304 validates the endpoint schema, and retry once without the validator when a poisoned cache body is confirmed. Co-authored-by: wishworldbetter <[email protected]>
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| Status | Name | Latest Commit | Preview URL | Updated (UTC) |
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ccusage-guide | 29f86cd | Commit Preview URL Branch Preview URL |
Aug 31 2026, 04:17 AM |
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Included review availability: Your plan provides up to 10 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe pricing module separates structural and loader-usable validation. The HTTP client adds gzip support, bounded ETag revalidation, per-user disk caching, atomic writes, and cache tests. ChangesPricing endpoint validation
Conditional HTTP cache flow
Cache validation tests
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: ⚪ Minimal · up to The pricing cache validation change is merge-ready after normal checks and review; no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant fetch_json
participant CacheEntry
participant upstream
participant PricingEndpoint
fetch_json->>CacheEntry: read cached ETag and body
fetch_json->>upstream: send request with If-None-Match
upstream-->>fetch_json: return 304 or response body
fetch_json->>PricingEndpoint: validate pricing body
fetch_json->>CacheEntry: atomically write ETag/body
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The changes satisfy issue
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ℹ️ One cache-boundary issue is called out inline; no other critical issues found.
Reviewed changes
- HTTP caching — Adds gzip-aware conditional requests, per-user URL-keyed ETag/body files, atomic replacement, bounded decoded reads, and one fresh retry after an invalid cached
304. - Endpoint validation — Adds LiteLLM and models.dev schema validators and rejects empty or unusable refreshes before caching or fallback decisions.
- Dependencies — Enables
ureq'sgzipfeature and updates the Rust lockfile.
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ccusage performance comparisonPR SHA: This compares the PR package against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
ccusage performance comparisonPR SHA: This compares the Rust PR release binary against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
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All reported issues were addressed across 4 files
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Reject cache entries whose body exceeds the decompressed pricing limit after the ETag framing is removed. Keep endpoint cache checks structural and endpoint-specific so the refresh path performs the full pricing-map load once, while preserving invalid-cache retry behavior. Co-authored-by: wishworldbetter <[email protected]>
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Actionable comments posted: 1
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Inline comments:
In `@rust/crates/ccusage-core/src/pricing.rs`:
- Line 84: Update Models.dev cached-response validation around
models_dev_object_has_required_shape so it requires at least one model that
survives load_models_dev_json_missing, not merely numeric nonzero costs;
preserve rejection of image-only entries such as gemini-2.5-flash-image. Add a
regression test covering an initial 200 response followed by 304, verifying the
invalid cached body triggers recovery rather than remaining accepted.
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rust/crates/ccusage-core/src/pricing.rsrust/crates/ccusage/src/http.rs
Included review availability: Your plan provides up to 10 included reviews per hour; 6 remain after this review.
ccusage performance comparisonPR SHA: This compares the PR package against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
ccusage performance comparisonPR SHA: This compares the Rust PR release binary against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
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Important
The new endpoint validator can cache malformed pricing bodies and reuse them on later 304 responses, so the typed loader never gets a chance to recover.
Reviewed changes — Reviewed the commits since the previous Pullfrog review, focusing on the tightened endpoint validation and cached-body limit.
- Tightened endpoint validation — Replaced loader-based checks with endpoint-specific JSON shape checks, including compact LiteLLM rates and non-zero models.dev pricing.
- Bounded cached bodies — Rejected cache entries whose body exceeds the pricing response limit and added regression coverage for the ETag allowance boundary.
@v0 or keep the SHA fresh with Dependabot ｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using GPT Luna (free via Pullfrog for OSS) ｜ 𝕏
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All reported issues were addressed across 2 files (changes from recent commits).
Reply with feedback, questions, or to request a fix.
Re-trigger cubic
Use the same Models.dev token-pricing and nonzero-rate eligibility gate for cache revalidation that the refresh loader uses. Keep fresh responses on the bounded shape gate so a structurally valid zero-loaded body reaches the loader, then reject it on 304 and recover with one unconditional request. Co-authored-by: wishworldbetter <[email protected]>
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All reported issues were addressed across 2 files (changes from recent commits).
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✅ No new issues found.
Reviewed changes — Reviewed the changes since the prior Pullfrog review, with full PR context, focusing on validation parity and cache recovery.
- Aligned cache validation — Reused typed models.dev parsing and loader-usability checks for cached
304bodies. - Added recovery coverage — Added regression coverage proving zero-loaded models.dev cache entries trigger an unconditional refresh.
- Preserved response bounds — Kept fresh response shape validation separate from strict cached-body validation while retaining body and ETag limits.
@v0 or keep the SHA fresh with Dependabot ｜ View workflow run ｜ Using GPT Luna (free via Pullfrog for OSS) ｜ 𝕏
ccusage performance comparisonPR SHA: This compares the Rust PR release binary against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
ccusage performance comparisonPR SHA: This compares the PR package against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
Use the five-second accept timeout for the first request in the zero-loaded Models.dev cache regression server, then use the 250 ms idle timeout only for optional tail requests. This prevents busy runners from missing the initial 200 response while preserving the existing 200 -> 304 -> 200 ETag/cache coverage. Co-authored-by: wishworldbetter <[email protected]>
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✅ No new issues found.
Reviewed changes — Reviewed the new test-harness commit since the prior Pullfrog review, with the full PR context, focusing on whether the cache-recovery regression remains deterministic and meaningful.
- Stabilized the first request — Changed
serve_responses_allowing_missing_tailto wait for the first request with the normal five-second timeout, retaining the short idle window only for optional follow-up requests.
@v0 or keep the SHA fresh with Dependabot ｜ View workflow run ｜ Using GPT Luna (free via Pullfrog for OSS) ｜ 𝕏
ccusage performance comparisonPR SHA: This compares the PR package against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
ccusage performance comparisonPR SHA: This compares the Rust PR release binary against the configured base package on the same CI runner. Package runtime diagnosticsCompares the PR package wrapper, the installed native optional dependency binary, and the workspace release binary on the same large fixture. This identifies whether slow package results come from JavaScript wrapper overhead, the published native binary build, or the Rust core itself. Fixtures: Claude
Committed fixture performanceCommitted small fixtures for stable PR-to-PR feedback and explicit Claude/Codex command coverage. Fixtures: Claude
Large real-world-shaped fixture performanceGenerated fixtures shaped from aggregate local log statistics: thousands of JSONL files, many small sessions, and a long tail of larger sessions. No real prompts, paths, or outputs are stored in the fixtures. Fixtures: Claude
Artifact size
Lower medians and smaller artifacts are better. CI runner noise still applies; use same-run ratios as directional PR feedback, not release guarantees. |
Upstream through 8841f92: official Antigravity SQLite adapter (ccusage#1677), ZCode (ccusage#1675) and Grok Build CLI sources, Copilot session-state usage (ccusage#1676), Codex originator breakdowns and cache-write token accounting (ccusage#1663, ccusage#1674), date-window file skipping (ccusage#1665), session totals scoped to the date window (ccusage#1664), OpenCode v2 session usage (ccusage#1668), timestamp-aware DeepSeek V4 pricing (ccusage#1679), ETag-validated pricing cache refreshes (ccusage#1672), and numeric-column preservation in narrow tables (ccusage#1671). Conflict resolutions per the personal divergence ledger: - Antigravity: adopt the upstream native adapter wholesale; remove the personal heuristic adapter and the antigravity-analysis/ provenance directory. - Codex: keep counting copied parent history (replay.rs stays deleted), keep tier changes applying at the following turn_context, keep the pre-v0.144.0 fast windows and the 2x fast-multiplier fallback, and keep the append-aware grouped cache with serde'd parser state. Integrate upstream cache-write tokens, originator sources, session_meta line detection, and filter_codex_usage_files date-window skipping. Bump the group, per-file event, and all-agent row cache discriminators. - Claude: rewire the cached daily/session summary wrappers onto upstream's date-scoped loaders (ccusage#1664). - OpenCode: keep WAL-signature cache signatures, the summary cache wrapper, and --no-cost -> Display mapping; take upstream's v2 session usage loading and split directory loader. - Pricing: keep the explicit GLM-5.2 rates and 1,000,000-token context limit (now via put_builtin_entry for both GLM-5.1 and GLM-5.2); take upstream's DeepSeek V4 scheduled rates and catalog rules. - Terminal: keep full dates whenever the minimum full-date layout fits and attached breakdown rows; take upstream's content-aware fallback minimums and numeric-column floors, adapting the 80-column regression test to the personal full-date policy. - Presentation: keep the hidden-by-default Models column and the all-agent --with-models opt-in; regenerate zcode/copilot session snapshots under the wider first-column floor. - Ledger: audit baseline updated to 8841f92; heuristic Antigravity and replay suppression recorded as retired divergences.
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Summary\n\n- Add gzip-aware per-user HTTP caching for pricing requests.\n- Replace body and ETag files atomically under bounded decompression and body limits.\n- Reuse cached data only after endpoint-specific validation and recover once from a poisoned 304 cache.\n- Keep stale-on-error disabled.\n\n## Validation\n\n- Focused cache, concurrency, workspace, Clippy, Hawk, docs, and diff checks pass.\n\nFixes #1564
Summary by cubic
Fixes pricing ETag cache refreshes so cached pricing is reused only when the server confirms it with a 304 and the body passes endpoint-specific validation.
gzipfeature onureqand addsflate2as a dependency.Fixes #1564.
Written for commit 29f86cd. Summary will update on new commits.
Summary by CodeRabbit
New Features
Bug Fixes