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RuleRoster

Source-backed platform rule

Deno frozen lockfile dependency-change behavior

Deno uses a lockfile by default, records exact versions and integrity hashes, and errors on dependency changes only when frozen mode is enabled.

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Direct answer

What is the rule?

Deno uses a lockfile by default to record exact dependency versions and integrity hashes. When `lock.frozen` is `true`, Deno errors if any dependency changes; default lockfile use is distinct from frozen mode, and the lockfile can be disabled explicitly with `"lock": false`.

Scope
Deno runtime, module, dependency-integrity, and pack rules
Human verified
August 14, 2026
Source checked
September 3, 2026

Published evidence

Rule details

Frozen lockfile behavior

Deno records exact dependency versions and integrity hashes in a lockfile used by default. With `lock.frozen` set to `true`, any dependency change produces an error. Default lockfile use is distinct from frozen mode, and `"lock": false` explicitly disables the lockfile.

Applicability

Service: Deno. Rule group: dependency-integrity. Scope is limited to this exact topic and its source-stated qualifiers.

Evidence trail

Official sources

Attribution and license

Deno documentation by the Deno authors, Copyright (c) 2018-2024 the Deno authors. Source: https://github.com/denoland/docs/tree/aa772cfbe4455e2a3ef86e9f4df584d41523c0f9. Licensed under the MIT License: https://github.com/denoland/docs/blob/aa772cfbe4455e2a3ef86e9f4df584d41523c0f9/LICENSE. Modified by RuleRoster: RuleRoster extracted and restructured facts into typed rule fields and concise answers. Verified 2026-08-14. No endorsement by Deno or the Deno authors is implied. Project names and marks remain descriptive source identifiers only.

Interpretation and accountability

Before you act

  1. Confirm that the scope matches your case.
  2. Keep recommendations, enforced limits, exceptions, and unstated details distinct.
  3. Open the official source before relying on the rule for a consequential decision.

Record dates

Published
August 15, 2026
Human verified
August 14, 2026
Source checked
September 3, 2026
Review due
September 4, 2026

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