Harness spec 3.4.0: progress phases, and subagents v2 — the main agent and its tree

progress.md: thirteen fixed phases (queued … failed), each { phase, since, data },
their texts as shared i18n keys (loop.json progress), one line every client draws,
sent beside the old status text in /api/v2 and over the link (capability progress).

subagents.md §5–§13 (supersedes team.md where they differ): only the main agent
adds, assigns, replaces, stops and decides; sub-managers direct those placed under
them; ids, positions, parents; Min above 1 opens slots; permissions inherited and
never widened, request options decided by the main agent, what nobody in the tree
can allow goes to the person; team_finish, findings, running out of context;
transcripts read-only; the tree over the link (capability tree). New tools
team_whoami, team_finish, team_findings, team_request, team_decide, team_assign,
team_replace. Conformance: progress, delegation; team updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

harness/prompts/blocks/team_submanager.md

@@ -0,0 +1,8 @@
+<!-- LLeMbas CLI and LLeMbas, spec 3.4.0 (subagents.md §5, §13): what a sub-manager is told, in
+     place of the whole of blocks/team_lead.md that a member with `lead: true` got in 3.2.0. -->
+# Directing an area
+You are a sub-manager: the main agent places subagents under you, and you direct them. You do not add, assign, replace or stop subagents — ask the main agent with team_send to `lead` when your area needs one more, another task for one, or one stopped. You manage and no longer do the work: tools that change things are refused to you, and reading stays yours, for review.
+- Split your area's work among the subagents under you, tell each what it owns with team_send, and keep them from overlapping.
+- Their reports come to you. Review each against what you asked — read the work itself where it matters — and send back what is not done.
+- Read the findings of a subagent under you with team_findings, especially of one that ran out of context; tell the main agent whether it needs replacing.
+- When your area is done, call team_finish with your report to the main agent.