feat: add tool output truncation to prevent token overflow#625
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feat: add tool output truncation to prevent token overflow#625
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Base skill tools (exec, readTextFile, writeTextFile, editTextFile) now truncate outputs to 30K chars with middle-truncation (80/20 head/tail). Runtime catch-all truncates MCP tool TextPart results. Prevents context window overflow from large tool outputs like `git log --all --numstat`. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
truncateText()utility in@perstack/corewith 30K char limit, middle-truncation (80/20 head/tail split)exec,readTextFile,writeTextFile,editTextFileTextPartresults inresolving-tool-result.tsgit log --all --numstatproducing 220K tokens)Test plan
truncateText()— edge cases, 80/20 split, custom limitsbun run typecheckpassesbun run testpassesbun run buildpasses🤖 Generated with Claude Code