qs breaking changes

6.16.0

2 breaking changes, first published August 29, 2026.

• Behavior changed parse
  With throwOnLimitExceeded set, parse now throws when comma groups under []= exceed arrayLimit, where it previously did not. Code relying on the old lenient parsing may now get an error. github.com
• Behavior changed stringify
  An empty array with own properties is now checked for cycles and its own keys are serialized when allowEmptyArrays is set, so output for such arrays can change. github.com

6.15.3

2 breaking changes, first published June 24, 2026.

• Behavior changed parse
  Inputs that grow arrays past the limit through combine or merge can now throw when throwOnLimitExceeded is set, where they previously did not. Code that relies on those inputs succeeding may need to handle the error. github.com
• Behavior changed utils.merge
  Merging arrays that exceed arrayLimit now throws on every array path, where some paths previously accepted them. Code that merges large arrays may need to handle the error or raise the limit. github.com

6.15.0

3 breaking changes, first published February 15, 2026.

• Behavior changed parse
  The duplicates option of parse no longer applies to keys written in bracket notation. Code that relied on duplicates handling for bracket keys will see different results. github.com
• Signature changed defaultDecoder
  Was type defaultDecoder = (str: string, decoder?: any, charset?: string) => string; now type defaultDecoder = (str: string, decoder?: unknown, charset?: string) => string. npmjs.com
• Signature changed defaultEncoder
  Was type defaultEncoder = (str: any, defaultEncoder?: any, charset?: string) => string; now type defaultEncoder = (str: unknown, defaultEncoder?: unknown, charset?: string) => string. npmjs.com

6.14.2

1 breaking change, first published February 11, 2026.

• Behavior changed arrayLimit
  The arrayLimit option is now applied as a maximum count of items rather than a maximum index, and indexed keys exceeding the limit become overflow objects. Code relying on the previous index-based limit may get different parsed results. github.com

Check your code

These are the changes. To see which of them reach your code, scan a public repository, or have your coding agent call check_code with your manifest or lockfile over MCP. The API reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys.