docs(headless-console): record the 2026-09-07 Opus fix-round ledger entry

N4 + summary: /status and /quit are console-intercepted verbs (they
never reach ChatCommandRouter), unlike @status which is a real server
command and still passes through untouched. Records the full S1-S7/
N1-N5 fix-round outcome, final Headless (207/1/208) and App LaunchOptions
(4/4) suite counts, and the one-commit-per-item/mutation-shown-to-fail
discipline used throughout.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/plans/2026-09-07-headless-console.md

@@ -136,6 +136,58 @@ it or the lead may, it is not a visual gate.
   unrelated to this change) / 3 skipped / 419 total. `dotnet build
   AcDream.slnx -c Release` green throughout.
 
+- 2026-09-07 FIX ROUND (Opus review, APPROVE-WITH-FIXES). S1: `ACDREAM_
+  HEADLESS_CONSOLE=0` now disables the console even when stdin is a real
+  terminal — the prior `== "1"` test let `"0"` silently fall through to the
+  terminal-shaped default; the flag is now the sixth entry in
+  `LaunchOptionsDocumentationTests.DefaultOnBehaviorFlags` (a default-on
+  behavior with an A/B off-switch, once set at all, like
+  `ACDREAM_RETAIL_CHASE`). S2: the reader-thread pin is now falsifiable — a
+  fixture `TextReader` records the actual thread id `ReadLine` ran on, and a
+  new test asserts the controller's submit callback runs on neither that
+  thread nor any other unexpected one, only the `DrainDue` caller's. S3: one
+  `HeadlessProcessHost` end-to-end test proves a console line reaches the
+  session's real `SubmitConsoleLine` pipeline and `/quit` returns
+  `HeadlessExitCode.Success`. S4: `HeadlessConsoleController.Handle` now
+  wraps `_submit` in try/catch (mirroring `LoginCommandSequence.DrainDue`)
+  and prints a line for `UnknownCommand`/`Dropped`, so a console typo can
+  never escape into the scheduler's per-session quarantine catch. S5:
+  deleted the per-call `HeadlessConsoleChatFeedback` decorator — it only
+  ever saw text produced by the console's OWN `SubmitConsoleLine` calls.
+  The new `HeadlessConsoleSpewBoxPump` polls the shared `SpewBoxState` on
+  the console's own per-tick pump instead, the SAME seam the graphical
+  overlay's `SpewBoxController.Tick` reads, so server- and plugin-driven
+  `ClientLocal` interface text prints too. S6: `Program.cs` now resolves
+  `standardOutputIsTerminal` next to the stdin probe and threads it through
+  `HeadlessEntryPoint.Run` → `HeadlessProcessHost`, which no longer reads
+  `System.Console.IsOutputRedirected` itself. S7: a multi-session process
+  launched with `--console` now reports `_diagnostics.Message("console",
+  "single-session only")` instead of silently skipping console attachment.
+  N1: corrected two stale dispatch-order doc comments
+  (`HeadlessSessionHost.SubmitConsoleLine`, `HeadlessConsoleController`'s
+  class remarks) to the real `ChatCommandRouter.Submit` order: retail's
+  client-command catalog, local `/help`, plugin verbs, the unregistered-
+  channel-tag fallback, an explicit server command, then plain chat. N2:
+  `HeadlessCommandLine.Console` renamed to `ConsoleEnabled`. N3: `validate`
+  mode now rejects `--console` outright rather than silently ignoring it.
+  N4: **`/status` and `/quit` are console-intercepted verbs — they never
+  reach `ChatCommandRouter`, unlike `@status`, which is a real server
+  command and still passes through untouched.** N5: `HeadlessConsoleRenderer`
+  now dims only lifecycle/command/portal lines; chat and interface text
+  print at the terminal's default weight.
+  Every new/changed test was shown to fail first against a targeted
+  mutation of the corresponding production code (see each commit's own
+  body for the specific mutation) before the fix landed; one commit per
+  item, all with `Co-Authored-By: Claude Fable 5.1`.
+  Suites (Release): `dotnet test tests/AcDream.Headless.Tests` → 207
+  passed / 1 pre-existing Linux-lane failure
+  (`LinuxRejectsGroupOrOtherCredentialPermissions`) / 208 total (up from
+  193/1/194 before this round — 14 new/changed tests). `dotnet test
+  tests/AcDream.App.Tests --filter "FullyQualifiedName~LaunchOptions"` →
+  4/4 passed, including the corrected `OnlyTheSixProductBehaviorFlagsDefaultOn`
+  (renamed from Five). `dotnet build AcDream.slnx -c Release` green
+  throughout.
+
 ### Connected proof recipe (owner runs; NOT run by the implementer)
 
 Against a running local ACE at `127.0.0.1:9000` with MossTank loaded for