cowork

The same error message covers at least six different root causes. Here's the diagnostic decision tree with PowerShell commands, log locations, and fixes for each one.

How I located Cowork conversations through session manifests: Windows transcript paths, message and tool-call records, and an audit log with per-session costs. Based on 195 local sessions in March 2026.

The Claude in Chrome file_upload tool fails with CDP error -32000 on every site. The fix is a single Chrome extension setting. Here's the one-line solution, the diagnostic that found it, and the wrong assumptions along the way.

High-frequency Cowork scheduled tasks can brick Claude Desktop on Windows and macOS. Root cause: the catch-up mechanism. Fix: rename one JSON file.

There's no official schema for Claude Desktop's Cowork session files. So I read 146 of them, diffed the fields, and documented what I found, including some surprises about what Anthropic stores locally.