delegating-with-context

# Delegating with context Writing a background brief for a subagent costs output tokens, generation time, and fidelity: exact paths, error strings and numbers get paraphrased or dropped, and the brief omits what the orchestrator did not know mattered. The `context_hook.py` PreToolUse hook removes the need. It reads the session transcript, asks Jev which chunks the task needs, and appends those chunks to the subagent's prompt verbatim. The hook fires after the prompt is written, so it cannot save a brief you already wrote. The saving happens here, before the tool input exists. ## Procedure 1. **Check the hook is live.** `test -s ~/.claude/context-filter-log.jsonl && tail -1 ~/.claude/context-filter-log.jsonl` shows the last filtered delegation. No file on a first delegation is normal; the hook's reply after your first Agent call confirms it (step 5). Where the hook is not wired (claude.ai, a machine without the settings entry), stop here and write a normal brief. 2. **Preview what the filter would pass.** One call, all tasks at once: ```bash python3 /mnt/skills/user/delegating-with-context/scripts/preview.py \ --task "Write the xr latency note for the follow-up memory" \ --task "Draft the closing status for both PRs" ``` Each task prints the kept chunk ids with a one-line gist. This is the check: find the chunk that holds the fact the subagent must not miss. It takes one to two seconds and costs a fraction of a cent. 3. **Write on...