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.
BetaShipCheck vs. Cursor BugBot
The coding tool can change.The repository memory should survive.
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.
Comparison based on publicly documented product capabilities as of September 2026. Features may change.
The difference
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.
Why ShipCheck
Review the change.Remember the behavior.
ShipCheck is not trying to win by producing more comments. Its advantage is retaining important behavioral knowledge after the pull request is over and bringing it back when the next change arrives.
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
What it is built around.
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.
The ShipCheck advantage
The repository should remember why behavior matters.
A reviewer can understand the current code. ShipCheck goes further by retaining the important expectations that understanding reveals and checking them again later.
01
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.
02
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.
03
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.
Behavior Contract v3
Persistent repository expectation
Expected behavior
Only the subscription owner may cancel a subscription.
Origin retained with governed runtime + test evidence
Behavior lifecycle
01
Introduced
Guard established
02
Preserved
Behavior intact
03
Preserved
Behavior intact
04
Violated
Regression found
05
Restored
Behavior fixed
Side by side
What each product actually stores and verifies.
This comparison avoids treating every kind of “memory,” rule, history, or context as equivalent. ShipCheck's strongest distinction is explicit behavioral state carried across repository history.
Capability
ShipCheck
Behavioral memory
BugBot
Current documented product
Automatic pull-request review
Team / repository review rules
Repository controls + Behavior Contracts
Rules learned from repository activity
Historical behavior discovery rather than reviewer-preference learning
Persistent software behavior object
Yes — Behavior Contracts V2
Not the primary abstraction
Explicit behavior lifecycle
No equivalent first-class lifecycle documented
Historical behavior origin
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
AI review is the central review model
The ShipCheck thesis
A repository should not need to rediscover the same critical behavior every time someone opens another pull request.
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.
Start with GitHub