work-items/triage: reconcile SKILL state machine + attention view with live labels

[kyle-sexton]

This was generated by AI during triage.

The triage SKILL documentation lags shipped reality on two points, each pure docs-match-reality (no design decision):

• The "Attention view (no number)" buckets in plugins/work-items/skills/triage/SKILL.md do not list the priority-axis raw marker that PR fix(work-items): re-key triage scope on state, not authorship (#486) #802's merged Scope section already defines (priority:needs-triage), so a repo filing raw intake under that axis is invisible to the no-arg attention view. Add it to the bucket list + filtering instructions, mirroring the Scope section's dual-axis wording.
• The state machine does not model status:needs-decision as a routing outcome even though the label is live and in active use (e.g. Adopt the documentation-existence admission test as a portable-baseline pre-check in doc-drift and declutter tooling #505). Document it as a recognized routing outcome.

Acceptance: attention-view buckets enumerate every raw marker per the Scope section's dual-axis wording; needs-decision appears in the state machine as a routing outcome; SKILL text is internally consistent.

Sweep-converted from #657.

[kyle-sexton]

This was generated by AI during triage.

Partial landing by work-items 0.18.1 (plugin reloaded 2026-07-21) — re-scope before working to avoid redoing shipped changes. The 0.18.1 triage SKILL.md now: (1) defines raw intake dual-axis in its Scope section (status:needs-triage / priority:needs-triage, "whichever axis the repo files it under"), and (2) lists status:needs-decision as a recognized routing outcome in the closing-invariant (raw-marker-clearing) section.

Residual for this issue: the "Attention view" bucket list (bucket 2) still names only status:needs-triage, not the dual-axis raw marker; and the state-machine ASCII diagram may not enumerate needs-decision as an outcome. Confirm current SKILL state and narrow scope to just the residual wording — or close if 0.18.1 is deemed sufficient (maintainer call; this lane cannot close). Informational only — labels unchanged.

[kyle-sexton]