6 hacks
Add the words "use a workflow" to a prompt and Claude writes a JavaScript orchestration script that runs subagents in the background, keeping only the final answer in your context.
Spin up a subagent for codebase search or verification so only the conclusion returns to your main context.
A skill that checks a link or reformats a file does not need your session model. Set model, effort and context: fork in the frontmatter so cheap skills stay cheap.
Define custom subagents with `isolation: worktree` so delegated edits happen on a temporary branch checkout.
When a skill hits an edge case, append it to a gotchas section in that skill rather than to CLAUDE.md. The lesson then loads only when the skill runs.
Turn off MCP servers unrelated to the current project—their tool schemas still consume context at session start.