Trace a Dart runtime failure to its real stack and verify the corrected behavior.
Editorial note checked 2026-10-29 against this instruction snapshot. Supporting scripts and runtime behavior remain outside this editorial review.
The source combines runtime diagnostics, language tooling and reload-based feedback. It discusses type and null-safety issues that can appear correct until a particular execution path runs.
Developers debugging a reproducible Dart or Flutter exception.
Hot reload can preserve state and hide startup problems. A broad cast or null assertion may suppress the symptom while retaining the underlying incorrect assumption.
Unknown; inspect source requirements and supporting scripts.
Inspect the pinned source snapshot and its supporting files first. The command selects this skill through the open-source skills CLI. Node.js and agent-specific setup may be required. Installation can download code. Catalog ingestion never executes skill instructions or install scripts.
npx skills add https://github.com/flutter/agent-plugins/tree/90fa51dc9d1bd6694cee226397e08ec8193e9e69/skills/dart-fix-runtime-errors --skill dart-fix-runtime-errorsReview pinned skill folder ↗ · CLI documentation ↗
After source review, use npx skills check and npx skills update to inspect and apply upstream updates. Re-check changed instructions before running them.
Static review only. This is not a security audit or a guarantee of safety.
SKILL.md text only; scripts, dependencies and runtime behavior not audited.
Allowed tools declaration: Unknown. Runtime permissions and network behavior: Unknown.
78/100 · Metadata coverage 80% · Model 1.0
Scores summarize observable discovery signals. Popularity and repository activity apply to the whole repository. Unknown runtime safety earns no certification.
Capture the active stack and triggering input, inspect the failing contract and make a narrowly justified change.
Repeat the failing interaction, test adjacent type and null cases and restart cleanly before reporting the runtime problem resolved.
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Test Dart logic with focused fixtures, readable organization and meaningful assertions.
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Collect Dart coverage and verify that the resulting LCOV report represents the intended tests.