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/tools/team_read.json

@@ -14,7 +14,7 @@
     "cli": [],
     "llembas": []
   },
-  "description": "The team and its room: every agent (name, role, who leads it, state, model, last activity), and the room's messages after `since` that are yours to see — those you sent or received and those of the members under you; the lead sees them all. Messages are numbered: pass the last number you saw as `since` to read only what is new.",
+  "description": "The tree and its room: every agent (name, id, position, parent, state, model, mode, context use, last activity), open slots, subagents that have ended, and the room's messages after `since` that are yours to see — those you sent or received and those of the subagents under you; the main agent sees them all. Messages are numbered: pass the last number you saw as `since` to read only what is new.",
   "parameters": {
     "type": "object",
     "properties": {