fix(usage): price Cursor Claude model aliases

[duncan-vc]

Cursor reports Claude model IDs such as claude-4.5-sonnet and claude-4.6-opus-high-thinking. The rate table uses claude-sonnet-4-5 and claude-opus-4-6, so these records still show zero cache savings after #13731. When Cursor omits a cost, the same mismatch leaves the record unpriced.

Extend the existing Cursor rate-name helper to normalize version-first Claude names and strip recognized effort/thinking suffixes in either order. The reader keeps the original display model; provider-reported costs and exact-model custom prices retain their existing precedence. All clients receive the corrected server usage summary.

The version-first name is documented in Cursor's usage API examples, and the -high-thinking ordering is already present in this repo's Cursor provider fixtures. No existing open PR covers this normalization gap.

Validation:

• The new pricing regression fails on current main with unpriced instead of modelPriced, then passes with the fix.
• 46 focused tests passed across usage pricing, transcript readers, and aggregation, including preserved provider-reported costs and display model names.
• Server typecheck, targeted lint, formatting, and git diff --check passed.
• No browser or live-provider run; this is a server parsing/pricing change with no client UI edits.

Model: GPT-6. Harness: Codex.

Summary by CodeRabbit

• Bug Fixes
  • Corrected pricing for Cursor usage reported with version-first Claude model names, including reasoning and speed variants.
  • Preserved reported provider costs when available.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This production change alters Cursor usage pricing and cache-savings calculations by normalizing additional Claude model aliases. Although the logic is localized and tested, pricing/metering changes require human review.

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📥 Commits

Reviewing files that changed from the base of the PR and between 95030dc and 3acfa41.

📒 Files selected for processing (3)

• apps/server/src/usage/cursorUsageReader.ts
• apps/server/src/usage/usagePricing.test.ts
• apps/server/src/usage/usageTranscriptReader.test.ts

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📝 Walkthrough

Walkthrough

Cursor Claude model names now map to canonical rate-table keys after supported trailing modifiers are removed. Pricing and transcript tests cover version-first names and provider-reported costs.

Changes

Cursor Claude rate model normalization

Layer / File(s)	Summary
Normalize Cursor model names and validate rate lookup apps/server/src/usage/cursorUsageReader.ts, apps/server/src/usage/usagePricing.test.ts, apps/server/src/usage/usageTranscriptReader.test.ts	cursorRateModel strips supported trailing modifiers and maps version-first Claude names to family-first rate-table keys. Tests cover canonical pricing, cache savings, provider-reported cost precedence, and transcript model fields.

Priority: ➖ Normal

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

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 3acfa

The Cursor Claude alias change has no identified issue that needs resolution before merge; normal checks still apply.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely identifies the main change: pricing Cursor Claude model aliases.
Description check	✅ Passed	The description explains what changed, why it changed, UI impact, and validation results. It omits the template's Checklist section, but the required information is otherwise mostly complete.
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.

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