v0.13.0

Added

• Subagent-driven model-tier routing — "plan deep, build cheap." Skills now
  split work by cognition: an architect plans a stage on the strongest tier and
  emits a transcription-grade spec in stable identifiers, cheap executors carry it
  out, and a reviewer gates the result. A new references/agent-routing.md
  defines a portable fast < balanced < deep tier ladder (recommended mapping
  Haiku → Sonnet → Opus) with an installer-overridable resolution table — no
  concrete model name is hardcoded anywhere, so the routing travels to any
  install, and a missing tier collapses to the nearest lower one. Four
  Claude-native role agents (architect, figma-executor, code-executor,
  reviewer), each model: inherit.
• Bridge-locked, verify-then-replace Figma authoring. figma-executor
  resolves names → nodeIds at run time, builds into a named WIP: frame, and
  finalizes only after a programmatic read-back (COMPONENT_SET/variable
  existence + count + bound-variable spot-check — a screenshot is not proof). The
  entire Figma surface is concurrency-1 through the single Console bridge.
• CI guards for the routing model. ci/validate-skills.mjs now asserts every
  agents/*.md frontmatter is model: inherit (fails on a hardcoded model name)
  and that agent-routing.md names all three tiers.

Changed

• Routing rolled across every subagent-driven skill. token-sync-layer
  (per-adapter → code-executor fast + reviewer), component-builder and
  icon-system-builder (Figma authoring → sequential architect →
  figma-executor), storybook-chromatic-builder (per-component story-gen →
  code-executor fast + reviewer), and token-builder / token-sheet-builder
  (reframed from "no subagents" to sequential architect → figma-executor).
  component-pipeline keeps its human gates between stages while subagents run
  continuously within one. On hosts without subagent dispatch, every site
  degrades cleanly to inline single-model execution.
• Figma preflight now asserts active-file identity. Because figma_execute
  targets whichever file is active in Figma Desktop, a connected bridge is not
  enough — references/figma-scripting.md now requires confirming the active
  fileKey matches the target (and re-confirming after any step that could switch
  it) before writing.