chore: retire the ReScript migration subsystem (FOT-R-22)

TEST-NEEDS.adoc

@@ -1,5 +1,18 @@
 == Test & Benchmark Requirements
 
+[NOTE]
+====
+SUPERSEDED 2026-09-15. This audit predates PR #93 — the engine now has 318
+passing tests, so "Unit tests: NONE (0 test files found)" below is false — and
+predates the FOT-R-22 retire, which deleted the nine migration-observer,
+batch-reviewer, report-generator and GenStage-pipeline modules still named in
+the file list below. Re-run the audit before acting on any figure here.
+
+VeriSimDB itself is NOT retired: it remains a live estate integration
+(`.machine_readable/integrations/verisimdb.a2ml`, gated by `dogfood-gate.yml`).
+Only the two FoT-internal writers went with the pipeline.
+====
+
 === CRG Grade: C — ACHIEVED 2026-04-04
 
 === Current State

docs/superpowers/specs/2026-09-07-fot-everywhere-design.adoc

@@ -60,8 +60,10 @@ Elixir 1.19 / OTP 27._
   question, not a build. This is the core and it stays the core.
 * A GenStage migration-observation pipeline (producer → review consumer →
   VeriSim writer) with a batch reviewer and report generator, built for the
-  ReScript migration. Real and tested, narrow in purpose, and the natural
-  seed for burst clustering at L5.
+  ReScript migration. RETIRED 2026-09-15 by owner ruling FOT-R-22: it was never
+  wired into the supervision tree, carried zero tests despite the claim above,
+  and the ReScript migration it was built for is moot under the bun-only
+  doctrine. Do not seed L5 burst clustering on it — it no longer exists.
 * The MCP server (`mcp/server.ex`, stdio by default, optional loopback TCP)
   exposing three tools: research, synthesize, submit.
 * The HTTP intake (`http_intake/router.ex`, 127.0.0.1:7722, off by default)

elixir-mcp/lib/feedback_a_tron/application.ex

@@ -12,9 +12,6 @@ defmodule FeedbackATron.Application do
   - NetworkVerifier: Pre-flight network checks
   - Doors: MCP stdio server and HTTP intake, opened by `FeedbackATron.Doors`
     from the `:doors` application env or the `FEEDBACK_O_TRON_*` environment
-  - MigrationObserver: ReScript migration session tracking (optional)
-  - BatchReviewer: Issue review queue (optional, with migration observer)
-  - Pipeline.Supervisor: GenStage pipeline (optional, with migration observer)
   """
 
   use Application
@@ -27,10 +24,7 @@ defmodule FeedbackATron.Application do
         System.get_env()
       )
 
-    children =
-      core_children() ++
-        FeedbackATron.Doors.children(doors) ++
-        migration_observer_children()
+    children = core_children() ++ FeedbackATron.Doors.children(doors)
 
     opts = [strategy: :one_for_one, name: FeedbackATron.Supervisor]
     Supervisor.start_link(children, opts)
@@ -47,32 +41,4 @@ defmodule FeedbackATron.Application do
       {FeedbackATron.NetworkVerifier, enabled: true}
     ]
   end
-
-  defp migration_observer_children do
-    if migration_observer_enabled?() do
-      [
-        FeedbackATron.MigrationObserver,
-        FeedbackATron.BatchReviewer,
-        FeedbackATron.Pipeline.Supervisor
-      ]
-    else
-      []
-    end
-  end
-
-  defp migration_observer_enabled? do
-    env_val = System.get_env("FEEDBACK_A_TRON_MIGRATION_MODE")
-
-    env_on? =
-      case env_val do
-        nil ->
-          false
-
-        value ->
-          normalized = value |> String.trim() |> String.downcase()
-          Enum.member?(["1", "true", "yes", "on"], normalized)
-      end
-
-    env_on? || Enum.any?(System.argv(), &(&1 == "--migration-observer"))
-  end
 end