tenx 0.27.0 — proactive delegation routing, configured Herdr/tmux projection, live-dispatch fixes

Delegation is now reachable, and live Herdr dispatch actually works.

What was wrong. Nothing in the loop ever proposed an isolated worker, and
even an explicit tenx dispatch --visual failed closed. Dogfooding a real
dispatch against a live Herdr session surfaced three defects on top of that.

Added

• tenx next emits a delegate ready ticket ... action naming the runnable
  tenx dispatch / tenx swarm command for every spec with ready tickets.
• tenx exec <SPEC> prints the same commands when a spec has more than one
  open ticket.
• The bundled tenx-dispatch skill routes proactively on ticket-shaped
  intent instead of suppressing itself, and carries the Herdr supervision
  commands inline so a projected worker never depends on another skill being
  routed.
• dispatch: section in .tenx/config.yaml (agent, visual) with
  TENX_DISPATCH_VISUAL and a new --no-visual override. Default stays
  headless, so nothing changes for projects that do not opt in.

Fixed

• herdr agent start --timeout is a readiness wait capped at 300000ms, not a
  work budget. tenx passed the ticket timeout there, so every visual
  dispatch failed with invalid_agent_timeout.
• The dry-run plan advertised a Herdr agent name with underscores while the
  live launch used dashes, so following the plan returned agent_not_found.
• --visual with no active multiplexer silently ran an invisible headless
  worker and reported success.
• A failed visual launch left .tenx/worktrees/<TICKET-ID> and the
  tenx/<TICKET-ID> branch behind.
• PyYAML wrapped long frontmatter titles at ~80 columns, and the built-in
  fallback parser dropped the continuation lines, so artifacts written on a
  PyYAML machine failed tenx validate on every install without it.

Resolution order for projection is CLI flag > TENX_DISPATCH_VISUAL >
dispatch config > headless. Unattended runs stay explicit:
tenx swarm <SPEC> --auto-reconcile from CI or cron.

Verified

Both smoke modes pass (module + clean install) on 3.10/3.12/3.13 in CI.
This release was itself dogfooded end to end: a ticket was dispatched to a
live Herdr workspace, the worker implemented it in an isolated worktree, and
the change was reviewed and landed through tenx reconcile.

---

Added

• Added proactive delegation routing: tenx next now names the runnable isolated-worker command for every spec with ready tickets, the tenx exec brief prints the same commands, and the bundled tenx-dispatch skill routes on ticket-shaped intent instead of suppressing itself. Added a dispatch section to .tenx/config.yaml (agent, visual) with TENX_DISPATCH_VISUAL override and --no-visual, defaulting to headless. (SPC-036)

Changed

• Teach capability catalog about configured projection and delegation trigger (dispatch and swarm flags, dispatch config section, --no-visual) (SPC-037)

Fixed

• tenx dispatch --visual with no active multiplexer now exits non-zero with the cause instead of silently running an invisible headless worker, and a launch that fails after worktree creation leaves no worktree or branch behind. (SPC-036)
• Fixed frontmatter portability: PyYAML wrapped long titles at ~80 columns, producing continuation lines the fallback parser could not read, so artifacts written on a PyYAML machine failed tenx validate on every install without it. The writer now emits unwrapped scalars and the round-trip is pinned by tests. (SPC-036)
• Fixed a second live-dispatch defect found by dogfooding: the dry-run plan advertised a Herdr agent name with underscores while the live launch used dashes, so following the plan with herdr agent get <name> returned agent_not_found. Plan and launch now share one herdr_agent_name() helper and the agreement is pinned by tests. (SPC-036)
• Fixed live Herdr dispatch, found by dogfooding: herdr agent start --timeout is a readiness wait capped at 300000ms, not a work budget, so passing the ticket timeout there made every visual dispatch fail closed with invalid_agent_timeout. The readiness budget is now bounded independently and the dry-run plan reports it truthfully. (SPC-036)