feat(model-router): wave 2-B — orchestrators declare phases, shifters and pins removed, frontmatter = off-state floor

The 15 Skill(effort-*) citers now call mcp__model-router__route per phase
(orchestrate at a dispatch span, reflect/plan for the skill's own level,
apply at the bookkeeping tail, escalate at the verify-secure caps); built-in
judgment dispatches carry an explicit effort= param. lib/effort-shift.md is
the route doctrine, lib/model-gate.md the mod rule (route answer = witness,
/route on as remedy). Deleted: skills/effort-*, lib/effort-pins.txt/.sh,
lib/model-check.sh, their tests, the installers' re-apply blocks. The mod
drops its Skill(effort-*) bridge. The tracked model:/effort: frontmatter
stays as the off-state floor, census-locked equal to the rows
(lib/tests/effort-routing.test.sh rewritten, 140 checks; analyzer → xhigh).

Contract .claude/tasks/contracts/2026-10-10-model-router-w2b-1045.md, plan
r4 § W2-B: GATE 0 MET, verifier ECARTS(7) then CONFORME 10/10, security
PASS, full make test green (design-tool-gate env red only).

mods/model-router/hooks/register.test.ts

@@ -59,24 +59,6 @@ const spawnInput = (model?: string) => ({
   ...(model === undefined ? {} : { model }),
 })
 
-test('Skill(effort-low) is answered without next, route shows low', async (
-  $, on) => {
-  let reached = false
-  on('tool.call', { tool: 'Skill' }, () => {
-    reached = true
-    return { result: { success: true, commandName: 'bottom' } }
-  })
-  await boot($, on)
-  const out = await $.tool.call({ tool: 'Skill', skill: 'effort-low' })
-  expect(out).toMatchObject({
-    result: { success: true, commandName: 'effort-low' },
-  })
-  expect(reached).toBe(false)
-  const line = mainLine(await route($, 'show'))
-  expect(line).toContain('skill effort-low')
-  expect(line).toContain('effort low')
-})
-
 test('route tool with phase orchestrate sets medium on main', async (
   $, on) => {
   await boot($, on)
@@ -987,14 +969,6 @@ test('run slot: route(clear) clears the turn and names the run', async (
   expect(JSON.stringify(out)).toContain('run reflect still holds')
 })
 
-test('Skill(effort-low) bridge is not sticky', async ($, on) => {
-  await bootRun($, on)
-  await loadSkill($, 'effort-low')
-  expect(mainLine(await route($, 'show'))).toContain('effort low')
-  await endTurn($)
-  expect(mainLine(await route($, 'show'))).toContain('session defaults')
-})
-
 test('route answer names the id even with a floor in force', async (
   $, on) => {
   await bootRun($, on)