fix: route case-insensitive worker messages

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

workplans/ADHOC-2026-08-25.md

@@ -66,3 +66,27 @@ rather than a traceback.
 - Plain `make` lists `help`, `install`, `uninstall`, `test`, and `check` with
   descriptions. `make check` passes 136 tests and `make install` refreshes the
   installed `tmux-amq==0.1.0` tool.
+
+## Case-insensitive protocol and full-screen worker output
+
+```task
+id: TAMQ-WP-ADHOC-2026-08-25-T03
+status: done
+priority: high
+```
+
+Make the `To:`, `From:`, and `Cmd:` protocol keywords case-insensitive and
+restore agent-authored routing when a full-screen terminal interface renders
+worker content behind a presentation gutter.
+
+### Evidence
+
+- All four representative letter-case variants route for `To:` and parse for
+  `Cmd:`; delivered `From:` envelopes remain inert regardless of case. Plain
+  shell panes install matching harmless absorbers for every keyword variant.
+- Worker output accepts a conservative full-screen output gutter (including
+  Codex's `•`) but rejects operator, shell, and markup gutters such as `›`,
+  `>`, `$`, `#`, `*`, and `-`.
+- A real tmux/PTY integration fixture emits a cursor-positioned, mixed-case,
+  bullet-framed worker message. It is durably attributed as `worker_output`
+  while the operator echo is suppressed.

workplans/TAMQ-WP-0014-readable-duplex-messaging-and-limits.md

@@ -27,8 +27,9 @@ old address aliases and changes `pushy` so that submission requires the new
 
 ## Required protocol contract
 
-The normalized line grammar is case-sensitive and recognized only at the start
-of a logical line:
+The normalized line keywords are case-insensitive and recognized only at the
+start of logical content. A terminal program's conservative worker-output
+gutter may precede worker content:
 
 | Observed source | Line | Effect |
 | --- | --- | --- |
@@ -254,8 +255,10 @@ while a worker output replay can duplicate an operator message.
 
 ## Completion evidence
 
-- The readable, case-sensitive `To:` parser is shared by attributed operator
-  input and normalized worker output. Durable provenance renders exactly as
+- The readable, case-insensitive `To:` parser is shared by attributed operator
+  input and normalized worker output. Conservative full-screen worker-output
+  gutters are removed before worker parsing, while operator prompt gutters stay
+  inert. Durable provenance renders exactly as
   `From:sender/o:` or `From:sender:`; `From:` and worker-output `Cmd:` lines are
   inert. Legacy `@/#` routing, reply/composer code, and generated v1 shims were
   removed from the active contract.