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Attachment context now does a better best-effort job with Linear attachments: text and embedded content are passed through directly, supported images can be summarized into agent context, and noisy binary failures stay quiet.
This release also adds targeted workspace cleanup after merged and closed PRs, stronger doctor checks for shared /linear-webhook setups, and --dry-run support for install and upgrade flows.
Docs and setup guidance were tightened so the multi-project workflow, attachment behavior, and operator checks are clearer and more actionable.