Prek makes the commit gate feel smaller

The familiar gate gets a new engine

Git hooks occupy an awkward place in developer tooling. They catch formatting drift, malformed configuration, generated-file mistakes, and accidental secrets before review, yet every added check lengthens the pause between git commit and getting on with the work. Teams then face a bad bargain: keep useful policy and tolerate the delay, or move checks exclusively to CI and discover simple failures later.

prek changes the runner rather than demanding a new policy format. The project is written in Rust and presents itself as a drop-in alternative to pre-commit. It reads the familiar .pre-commit-config.yaml, manages hook environments, and runs independent work concurrently. Its first public GitHub release appeared on October 31, 2024, placing it inside the feed's newer-tool window, while its current documentation also describes monorepo discovery, built-in Rust implementations of common hooks, and an optional native TOML configuration.

Compatibility is the important product decision. A repository can evaluate prek against an existing configuration instead of rewriting every hook on day one. That lowers the cost of a trial and keeps the configuration legible to contributors still using pre-commit. The native prek.toml path exists for teams that want newer features, but choosing it deliberately gives up that two-runner compatibility.

Production adoption is more useful than a stopwatch

Maintainer benchmarks are helpful for forming a hypothesis, not for settling it. Hook performance depends on file counts, cache warmth, environment creation, network access, and the actual programs invoked. If a Python formatter consumes most of the wall clock, replacing only the orchestrator cannot turn it into a native Rust check.

Home Assistant supplies stronger evidence of actual use. Its developer documentation announced a migration from pre-commit to prek in January 2026, citing the shared configuration and parallel execution, and its public core configuration contains instructions that invoke prek. That does not establish universal compatibility, but it shows the tool operating in a large, polyglot repository rather than only in a demonstration fixture.

A fair trial should record more than the fastest run:

• compare cold and warm runs on the same commit;
• exercise commit, push, manual, and CI stages the repository relies on;
• remove caches once to test environment reconstruction;
• confirm that changed-file selection and exit codes match expectations; and
• inspect any hooks whose correctness depends on execution order.

Parallelism is valuable precisely because hooks are often independent. It can also reveal accidental dependencies that a serial runner concealed. If one hook generates a file that another consumes, encode that relationship explicitly or keep those operations serial instead of trusting historical timing.

The runner is not the rule

prek coordinates checks; it does not decide whether those checks are appropriate. Remote hook repositories still execute code on developer machines, language environments still need versions, and mutable tags still weaken reproducibility. Pin revisions, review updates, and keep hook scope narrow enough that developers understand what runs when they commit. A faster path should not become a quieter supply-chain path.

The project includes several built-in hooks, which can avoid environment startup for routine file hygiene. For domain work, focused tools remain useful. rumdl, for example, is a Rust Markdown linter and formatter with a dedicated pre-commit hook repository, editor support, CI annotations, and compatibility with existing markdownlint configuration. Pairing it with prek illustrates the clean boundary: prek selects files, stages, and scheduling; rumdl owns Markdown rules and fixes.

That separation also makes failures easier to diagnose. A hook that never starts points toward configuration or environment setup. A Markdown diagnostic belongs to rumdl and its rule configuration. A CI-only discrepancy suggests different stages, versions, caches, or file sets. Collapsing all of those concerns into a generic “the hook failed” message would squander the operational clarity a composable toolchain can provide.

Adoption should remain reversible

The safest migration begins with the existing YAML. Run prek explicitly in local development and CI, compare results with pre-commit on representative changes, then replace installed Git shims only after the team understands the differences. Keep the earlier path documented during the evaluation so contributors can distinguish a runner problem from a policy problem.

Speed is not merely cosmetic. Short feedback loops make it more likely that checks stay enabled and run before code reaches review. Still, the goal is not the smallest benchmark number. It is a gate developers trust enough to keep, backed by pinned inputs, observable failures, and CI verification. prek's most compelling idea is therefore conservative: preserve the accumulated hook ecosystem, modernize the machinery underneath it, and make the result easy to reverse if the promised compatibility does not hold.