Files
esengine ad2c963475 refactor(delegation): replace the task family with spawn_agents
Rewrite internal/runtime/delegation around one Runner and one tool.
spawn_agents runs 1 to 8 independent tasks in parallel, each in its own
session with three base tools (read_file, write_file, bash); plan mode and
read-only skills keep a read-only child. A child's full answer is archived;
the caller gets the opening, a reference, and the files the child read and
wrote, and pages the rest through read_subagent_result.

Removed with it: task, read_only_task, parallel_tasks, fleet,
list_subagents, background sub-tasks, steering and its limits and settings
UI, continue_from, write_paths claims, isolated worktrees, best-of-n, the
run graph and the runtime-resume benchmark. Stale writes by children stay
refused through the per-agent file views.

The use_capability description no longer names task:fleet, so the stable
prefix and its golden files change once.
2026-11-02 08:52:45 -08:00
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