Modeled baseline for the estimated savings series (GL #479 D1): a native
agent grep tool ships matches with surrounding context lines, per-file
headers and line numbers, which is roughly 2.5x the tokens of the bare
match lines lean-ctx observes. This factor is a documented model
assumption — it feeds stats.json (“estimated”) only. The signed savings
ledger (“verified”) records observed_tokens without any factor applied.
Back-compat shim: the pre-#870 8-arg entry point. Delegates to
handle_filtered with no exclude filters. New callers pass the two
exclude args directly.