Mneme HQ vs Cursor Rules

Mneme HQ vs Cursor Rules

At a glance — what each tool is best for, where it falls short, and the point at which teams add Mneme HQ:

What Cursor Rules are

• A .cursorrules file (plain text) placed at the root of a repo
• Injected as system prompt preamble when Cursor opens a session in that directory
• Written manually — no schema, no typed fields, no version tracking
• One flat file per repo — the same rules apply to every file regardless of context
• Cursor-native: they only work in the Cursor editor
• Suggestions: the model receives them as instructions but can still ignore or contradict them

Cursor Rules solve a practical problem: you want the model to know your project conventions without pasting them into every prompt. For individual developers in Cursor, they work well within those limits.

What Mneme HQ does differently

When Cursor Rules are sufficient

• You use Cursor as your primary editor and have no plans to change
• You are a solo developer — no multi-engineer or multi-agent workflows
• Your rules apply uniformly to every file in the project
• Suggestions are acceptable — you don't need a violation to actually block
• You have no conflicting rule sets (org policy vs team exception, for example)
• You don't need to track when a decision changed or why it was superseded

When Mneme HQ is required

• You use Claude Code. Cursor Rules only work in Cursor. Mneme HQ integrates directly with Claude Code's hooks API — it operates at the Edit/Write operation level, not at the editor level.
• Your rules are context-specific. A flat .cursorrules file cannot distinguish between services/payments/** and analytics/**. Mneme HQ's glob-scoped rules enforce the right constraints for the right files.
• You need a violation to be stopped. Cursor Rules are injected as context — the model may still generate the forbidden thing. Mneme HQ's hooks block the Edit/Write operation before it lands.
• Your rules conflict. Org-wide policy vs team override vs individual exception — without a precedence model, conflict resolution falls to the model's judgment. Mneme HQ resolves conflicts deterministically.
• You run AI agents. Agents don't read system prompts the way an interactive session does. Hook-level enforcement is the only governance that applies uniformly to both human and agent sessions.
• Decision history matters. When a rule was introduced, when it was superseded, and why — Mneme HQ tracks this. A rules file doesn't.

Can Mneme HQ and Cursor Rules be used together?

Yes — and for most teams that is the recommended setup. Many engineering teams use Cursor for interactive coding and Claude Code for agentic tasks (refactoring runs, code generation pipelines, automated PR workflows). In that setup, Cursor Rules cover the Cursor sessions and Mneme HQ covers the Claude Code sessions.

They don't conflict — they operate on different editors. But only Mneme HQ provides enforcement at the hook level. If a rule violation matters enough to block, it needs to be in Mneme HQ regardless of which editor it originated from.

When should a team switch from Cursor Rules to Mneme HQ?

In practice teams rarely switch away from Cursor Rules — they keep the rules file and add Mneme HQ for enforcement. The trigger to add it is when a rule must actually block rather than suggest, when rules differ by path (payments services stricter than analytics), when more than one editor or agent touches the code, or when you need an audit trail of when a decision changed and why. Below those thresholds, Cursor Rules alone are fine.

Cursor Rules alternatives

If you are evaluating Cursor Rules alternatives, they fall into three groups. Other rules-file formats (CLAUDE.md, .clinerules, Copilot Instructions) move the same plain-text approach to a different editor but keep its ceiling: suggestions the model can ignore. Retrieval or RAG memory surfaces past context at prompt time but still cannot block a violation. Enforcement layers — Mneme HQ is the one built for this — are the only category that turns a decision into a hook that blocks the Edit/Write call. Choose by what is failing: if rules are being ignored, you need enforcement, not another rules file.

The migration path

Teams that have already written .cursorrules files can treat them as a starting point for Mneme HQ's decision corpus. The rules are the same — the difference is converting them into typed JSON entries with scope, status, and rationale fields, then enabling hook-level enforcement.

For a deeper look at how the two differ in practice, see the editorial comparison: Mneme vs Cursor Rules.

Decision matrix — choose one in 30 seconds

If most of these statements are true, Cursor Rules alone are sufficient:

• You are a solo developer, or a 2–3 engineer team that all use the same editor.
• Your project conventions apply uniformly to every file in the repo.
• You have not yet hit a case where the model ignored a rule and shipped the violation anyway.
• You are not running async or CI agents that touch the codebase outside an editor session.
• You do not need an audit trail of when a rule changed or why.

If any of these statements is true, you have outgrown Cursor Rules and need hook-level enforcement:

• You use Claude Code, Windsurf, GitHub Copilot, or a custom SDK agent in addition to (or instead of) Cursor.
• Different parts of the codebase have different rules — payments services have stricter constraints than analytics, for example.
• You have rules that must hold — a violation should block the diff, not be a suggestion the model can override.
• Two rules sometimes contradict each other and the team currently resolves it through Slack rather than a precedence model.
• You run an agent in CI that opens PRs, and you want the same governance applied there as in interactive sessions.

FAQ