The memory belongs to the repository
Behavior Contracts remain relevant whether the code came from Cursor, Codex, Claude Code, Copilot, another agent, or a human developer.
Coding tools come and go.System judgment should endure.
Cursor BugBot automatically reviews pull requests for bugs, security issues, and code-quality problems. It now supports repository rules, team rules, learned rules derived from repository activity, configurable review effort, and multiple repository providers. ShipCheck stays independent of the coding environment and makes protected software behavior the persistent object being verified.
This is a product-model guide, not a measured accuracy comparison. Inspect benchmark results and methodology →
Context for review. Memory for the system.
BugBot can learn rules from the way a repository is reviewed. ShipCheck goes one level closer to the product itself: it stores explicit software behavior as a governed contract, verifies it against required evidence, and records how that risk affected the ship decision.
ShipCheck
Rules become concrete behavior outcomes
ShipCheck does not stop at supplying guidance to a reviewer. It records whether known behavior actually remained true after the change.
History extends beyond learned review guidance
Behavior History captures the lifecycle of an invariant, while Historical Origin traces where it was established.
Independent verification is intentional
ShipCheck is not a coding environment. It exists specifically as a downstream check on changes produced elsewhere.
BugBot
Automated PR review
BugBot reviews PR updates automatically and posts explanations and suggested fixes.
Layered review rules
BugBot can combine team rules, repository rules, project BUGBOT.md files, and learned rules.
Adjustable review effort
Usage-based plans can trade additional reasoning time and cost for deeper review effort.
What changes in practice.
These differences determine whether context disappears after review or becomes durable protection for the next change.
ShipCheck is deliberately separate from code generation.
The same behavioral guard protects the repository regardless of which editor, agent, model, or developer created the next change.
A learned rule is guidance. A Behavior Guard is an invariant with an outcome.
Future ShipCheck scans can report that a known expectation was preserved, changed intentionally, violated, restored, or newly introduced.
ShipCheck remembers why the behavior exists.
Historical Origin can recover the commit and implementation evidence behind an expectation instead of limiting repository memory to the guidance supplied to the next review.
Compare the operating model.
A direct view of the features that shape how each product reasons about change.
| Capability | ShipCheck | BugBot | Context |
|---|---|---|---|
| Automatic pull-request review | Yes | Yes | |
| Team / repository review rules | Repository controls + Behavior Contracts | Yes | |
| Rules learned from repository activity | Historical behavior discovery rather than reviewer-preference learning | Yes | |
| Persistent software behavior object | Yes: Behavior Contracts V2 | Not the primary abstraction | |
| Explicit behavior lifecycle | Yes | Not assessed here; consult current vendor documentation | |
| Historical behavior origin | Yes | History can produce learned rules, but not the same origin model | |
| Coding-environment independence | Yes: intentionally downstream of generation | Reviewer is part of the broader Cursor product | |
| Deterministic verification | Yes | AI review is the central review model |
Let any agent write the change. Keep the verification memory with the repository.
ShipCheck gives future code one consistent set of behavioral expectations regardless of how that code was generated.