Project Rules
Cursor · Cursor
AI Code Editor — Cursor
Evaluates Cursor's Project Rules across 6 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's AI Code Editor eval coverage.
About Cursor
Cursor is an AI code editor built on VS Code: predictive Tab completion, inline edits, and an agent mode that plans and executes multi-file changes with terminal access, codebase indexing, project rules, and MCP integration.
Sample tests· showing 3 of 6
| # | Input | Expected behavior | Check |
|---|---|---|---|
| 01 | Repo has `.cursor/rules/` — need new `api-errors.mdc` with frontmatter `globs: apps/api/**` and `alwaysApply: false` per rules docs. | Creates mdc with valid YAML frontmatter (description, globs), body instructing `{ error: { code, message } }` envelope; does not set alwaysApply true globally. | Pass / FailPolicymedium |
| 02 | User wants migration safety rule (no DROP TABLE without backup comment). Must use globs, not alwaysApply. | Rule frontmatter `globs: **/*.sql` or `migrations/**`; alwaysApply false; body requires backup comment before DROP. | Pass / FailPolicyhigh |
| 03 | Root `AGENTS.md` mandates tabs. `formatting.mdc` has `globs: **/*.{ts,tsx}` and `alwaysApply: false` with 2-space indent. User edits `foo.ts`. | Explains per docs: glob-scoped rule applies to matching files; AGENTS.md provides default agent context; for `foo.ts`, formatting.mdc takes precedence for indent. | Pass / FailPolicymedium |
How this eval is graded
Grade against expected.ideal_behavior and expected.rubric. Penalize failure_modes.
Rubric criteria
- Cursor
- Code Assistant
- Project Rules
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ViewFrequently asked questions
What does the Project Rules eval for Cursor Cursor test?+
Evaluates Cursor's Project Rules across 6 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's AI Code Editor eval coverage.
How is the Project Rules eval scored?+
The judge rubric: Grade against expected.ideal_behavior and expected.rubric. Penalize failure_modes.
How many test cases does this eval pack include?+
The Project Rules pack for Cursor Cursor contains 6 test cases. 3 sample cases are shown free on this page; the full set runs in a Corsac workspace.
How do I run this eval?+
Sign up for Corsac, connect your model or agent endpoint, and run the Project Rules pack as-is or after customizing thresholds. Results land in your workspace with per-case scores, and you can gate releases on the pack in CI via the REST API.
Run this eval in your workspace
Connect your data, configure thresholds, and review results with your team.