cachelane-audit

See where your Claude Code input tokens went, and why the prompt cache rebuilt. Reads your local transcripts (~/.claude/projects). Usage metadata only, nothing leaves your machine. Zero dependencies.

npx cachelane-audit              # last 30 days
npx cachelane-audit --days 7 --project .
npx cachelane-audit --json --no-paths

It reports:

• Your cache hit ratio.
• The share of input spend that went to cache rebuilds.
• What caused each rebuild: idle past the cache TTL, model switch, compaction, a proxy stripping cache markers, or a prefix change.

Cold-cache guard (Claude Code plugin)

/plugin marketplace add Aditya-Tripuraneni/CacheLane
/plugin install cachelane@cachelane

When you come back to a session whose cache has expired and whose context is large (150k tokens by default), the guard blocks your first message once. It shows what continuing, /compact, and /clear would cost. Send your message again to proceed; you are only warned once per break.

npx cachelane-audit guard off | on | status | threshold 200000

Dollar figures use Anthropic API list prices. On a Pro/Max plan, read them as relative usage.