Fix dlx installs when caller enables constraint checks

[ruimartin]

Context

yarn dlx inherits the caller's enableConstraintsChecks: true setting, but installs into a temporary project without the caller's yarn.config.cjs. Its install then fails with Constraints configuration file not found, preventing one-off commands from running.

Change

Skip automatic constraint checks for the temporary install used by dlx. Normal project installs continue to honor enableConstraintsChecks.

Validation

Validated with a caller project that enables constraint checks and has a failing constraint: yarn dlx completes, while yarn install still reports the constraint violation. The release build and focused integration suites passed on the current main base.

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Note

Low Risk
Narrow opt-out for dlx temp installs only; normal installs unchanged aside from the new flag defaulting to false.

Overview
Fixes yarn dlx failing when the caller has enableConstraintsChecks: true but the ephemeral dlx project has no yarn.config.cjs (previously surfaced as a missing constraints config error).

Adds skip_constraints_check on RunInstallOptions and sets it for dlx’s temporary install so automatic constraint validation is skipped there. Regular yarn install still runs constraint checks when the setting is enabled.

Adds an acceptance test: dlx succeeds under a failing constraint setup, while install still rejects with a constraint failure.

^{Reviewed by Cursor Bugbot for commit 81ec42c. Bugbot is set up for automated code reviews on this repo. Configure here.}

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⏱️ Benchmark Results

gatsby install-full-cold

Metric	Base	Head	Difference
Mean	4.464s	4.495s	+0.70% ⚠️
Median	4.458s	4.492s	+0.76% ⚠️
Min	4.382s	4.409s
Max	4.572s	4.589s
Std Dev	0.054s	0.046s

📊 Raw benchmark data (gatsby install-full-cold)

Base times: 4.518s, 4.420s, 4.395s, 4.445s, 4.480s, 4.563s, 4.444s, 4.572s, 4.485s, 4.552s, 4.446s, 4.405s, 4.417s, 4.480s, 4.454s, 4.446s, 4.461s, 4.471s, 4.469s, 4.468s, 4.415s, 4.473s, 4.417s, 4.382s, 4.397s, 4.514s, 4.402s, 4.426s, 4.531s, 4.563s

Head times: 4.470s, 4.479s, 4.476s, 4.431s, 4.456s, 4.508s, 4.589s, 4.517s, 4.445s, 4.516s, 4.516s, 4.577s, 4.526s, 4.482s, 4.450s, 4.564s, 4.543s, 4.494s, 4.456s, 4.475s, 4.449s, 4.490s, 4.554s, 4.457s, 4.434s, 4.524s, 4.409s, 4.554s, 4.511s, 4.500s

---

gatsby install-cache-only

Metric	Base	Head	Difference
Mean	1.363s	1.387s	+1.77% ⚠️
Median	1.363s	1.364s	+0.11% ⚠️
Min	1.342s	1.341s
Max	1.393s	2.020s
Std Dev	0.012s	0.120s

📊 Raw benchmark data (gatsby install-cache-only)

Base times: 1.354s, 1.359s, 1.349s, 1.369s, 1.363s, 1.347s, 1.370s, 1.360s, 1.379s, 1.365s, 1.381s, 1.393s, 1.362s, 1.355s, 1.358s, 1.342s, 1.347s, 1.342s, 1.375s, 1.362s, 1.365s, 1.365s, 1.364s, 1.366s, 1.376s, 1.380s, 1.365s, 1.360s, 1.345s, 1.362s

Head times: 1.345s, 1.341s, 1.347s, 1.357s, 1.363s, 1.369s, 1.349s, 1.355s, 1.349s, 1.361s, 1.387s, 1.347s, 1.370s, 1.373s, 1.362s, 1.388s, 1.384s, 2.020s, 1.361s, 1.379s, 1.374s, 1.359s, 1.385s, 1.384s, 1.379s, 1.366s, 1.354s, 1.376s, 1.353s, 1.367s

---

gatsby install-cache-and-lock (warm, with lockfile)

Metric	Base	Head	Difference
Mean	0.387s	0.388s	+0.22% ⚠️
Median	0.388s	0.388s	+0.15% ⚠️
Min	0.378s	0.379s
Max	0.408s	0.399s
Std Dev	0.005s	0.005s

📊 Raw benchmark data (gatsby install-cache-and-lock (warm, with lockfile))

Base times: 0.389s, 0.391s, 0.393s, 0.390s, 0.389s, 0.391s, 0.387s, 0.389s, 0.389s, 0.408s, 0.390s, 0.378s, 0.386s, 0.385s, 0.383s, 0.379s, 0.390s, 0.386s, 0.387s, 0.382s, 0.391s, 0.384s, 0.388s, 0.389s, 0.389s, 0.385s, 0.383s, 0.381s, 0.383s, 0.386s

Head times: 0.386s, 0.389s, 0.399s, 0.387s, 0.388s, 0.381s, 0.379s, 0.384s, 0.380s, 0.384s, 0.390s, 0.387s, 0.395s, 0.393s, 0.390s, 0.382s, 0.387s, 0.385s, 0.392s, 0.388s, 0.383s, 0.392s, 0.386s, 0.391s, 0.397s, 0.395s, 0.392s, 0.394s, 0.383s, 0.388s