skill-registry-reminder-costs-30k-tokens-per-tool-call
The full skill-registry system reminder (~170 skills) is re-injected on every tool call return, costing approximately 30k context tokens per round-trip in long sessions. This causes rapid context exhaustion when many tool calls are made sequentially. Mitigation: batch mutations into single Bash scripts, use subagents for isolated research (they have a fresh context), and prefer Bash multi-command chains over sequential individual tool calls.