The headline answer: how much of the context window is consumed before the conversation starts, broken down by source (skills, memory files, MCP servers). Use this first.

Skills ranked by how many tokens their always-loaded description costs. The top of this list is where trimming pays off most.

Skills whose name appears more than once (same skill installed from several sources). Every copy pays full description cost in every session. Copies are compared by content hash: identical copies are safe to remove, same-name copies that DIFFER are flagged for review because deleting one would lose work.

CLAUDE.md / AGENTS.md files that load in full every session, including files pulled in by @import lines — the cost that hides behind a small-looking parent file. Reports sizes and the import graph only, never file contents.

Every MCP server configured across the agent clients on this machine, and which config declares it — useful for spotting servers you forgot you installed. Environment variable NAMES only; values are never read.