Truncate CDK diff PR comment when over GitHub's comment-length limit#135
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aaronmedina-dev merged 2 commits intomainfrom Apr 20, 2026
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When a CDK diff is very large (e.g. broad IAM pipeline changes), the generated PR comment body exceeds GitHub's 65536-character issue comment limit, and the Post diff to PR comment step fails with 'Body is too long'. The full diff is already uploaded as a workflow artifact, so when the comment body exceeds the safe limit it is now truncated and a notice linking to the workflow run artifacts is included instead of failing the job.
aaronmedina-dev
requested review from
AdamJHall,
TheOrangePuff,
crispy101 and
tmthrgd-aligent
TheOrangePuff
approved these changes
Apr 20, 2026
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Summary
Post diff to PR commentstep then fails withBody is too long (maximum is 65536 characters), marking the whole CDK job red even though the diff was produced successfully.deployment-diff-<stack>by the prior step, so no information is lost.Context
aligent/aligent-aws-access-cdkPR fix: use mask to hide secrets #49 (deleting the trucktech stack). Removing one client shifts everyclient-account-deploys.Npipeline index, producing a diff comment roughly 289,000 characters long.