fix: guard output.output against undefined in tool.execute.after hooks #1724
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Confidence score: 5/5
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Auto-approved: Minor additions of type checks to prevent errors, no regressions detected, aligns with criteria for safe changes.
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recheck |
Three hooks crash with TypeError when output.output is undefined for external MCP tool results. Add null/type guards before calling string methods (.toLowerCase(), .startsWith(), .includes()) on output.output. Affected hooks: - comment-checker: output.output.toLowerCase() at line 95 - edit-error-recovery: output.output.toLowerCase() at line 47 - task-resume-info: output.output.startsWith() at line 24 The tool-output-truncator hook already had this guard (typeof check at line 42), so this aligns the other hooks with that pattern. Fixes code-yeongyu#1720
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Summary
output.outputin 3 hooks that crash when it'sundefinedTypeError: undefined is not an object (evaluating 'output.output.toLowerCase')for external MCP toolsProblem
Three
tool.execute.afterhooks call string methods onoutput.outputwithout checking if it's defined:comment-checker/hook.tsoutput.output.toLowerCase()(line 95)edit-error-recovery/hook.tsoutput.output.toLowerCase()(line 47)task-resume-info/hook.tsoutput.output.startsWith()(line 24)When OpenCode passes
undefinedforoutput.output(observed with external MCP tools), all three crash withTypeError.Fix
Added
if (!output.output || typeof output.output !== "string") returnguard before accessingoutput.outputmethods. This matches the existing pattern intool-output-truncator.ts(line 42) which already had this guard.Context
output.outputfor themSummary by cubic
Guard output.output against undefined in tool.execute.after hooks to prevent crashes with external MCP tools. Fixes #1720.
Written for commit 290cf3d. Summary will update on new commits.