test: keep composer fixtures Bash 3.2-clean and align relaunch startup waits

.github/workflows/ci.yml

@@ -390,6 +390,16 @@ jobs:
             exit 1
           }
 
+          # The composer classifier runs under stock /bin/bash on every macOS
+          # fleet, and its fixtures must be pure UTF-8 (Bash 3.2 has no \u).
+          composer_output=$(/bin/bash tests/fm-composer-lib.test.sh)
+          printf '%s\n' "$composer_output"
+          composer_count=$(printf '%s\n' "$composer_output" | grep -c '^ok - ')
+          [ "$composer_count" -eq 33 ] || {
+            echo "::error::expected 33 composer classifier tests, got $composer_count"
+            exit 1
+          }
+
           command -v npm >/dev/null || { echo "::error::npm is required to install tasks-axi"; exit 1; }
           npm install -g tasks-axi@0.2.5 >/dev/null
           PATH="$(npm prefix -g)/bin:$PATH"

docs/fm-test-isolation-proof.md

@@ -125,6 +125,7 @@ Admitting the family moves that tail into the bounded concurrent group.
 Current runner-file selection was verified on 2026-08-28 with the runner and its tests bound to each measured Bash version.
 Because the runner uses `#!/usr/bin/env bash` and invokes each test with `bash` from `PATH`, the stock macOS measurement used `PATH=/bin:$PATH bin/fm-test-run.sh --changed --max-wall-ms 300000` so both resolved to `/bin/bash` 3.2.57.
 Two runs selected all 33 scripts, passed the five-minute result check in 153.5s and 166.8s, and reported the same two failures as `main`: `tests/fm-muse-harness.test.sh` and `tests/fm-composer-lib.test.sh`.
+`tests/fm-composer-lib.test.sh` passes under that shell as of 2026-09-03: its failure was an escaped `\u` fixture that Bash 3.2 cannot decode, and the stock macOS Bash lane in [`.github/workflows/ci.yml`](../.github/workflows/ci.yml) now runs the suite under real `/bin/bash` 3.2 so the defect cannot return unnoticed.
 With Bash 5.3.9 on `PATH`, three runs of `bin/fm-test-run.sh --changed --max-wall-ms 300000` selected the same 33 scripts, completed with 0 failures, and reported 163.8s, 172.0s, and 166.9s.
 All five runs used plain `--changed` with no `--jobs` flag, exercised the production automatic scheduler, and completed under five minutes.
 

tests/fm-composer-lib.test.sh

@@ -269,20 +269,22 @@ test_matrix_herdr_halfblock_rule_bounds_bare_wrap() {
   # rather than the box-drawing family. Without treating those as edges, a bare
   # composer's WRAP region walks through its own closing rule and swallows the
   # footer, whose real content turns an idle pane into a false `pending`.
-  # Captured live from a herdr cursor pane.
-  local screen plain out
-  plain=$'transcript\n \u2584\u2584\u2584\u2584\u2584\u2584\u2584\u2584\n  \u2192 Add a follow-up\n \u2580\u2580\u2580\u2580\u2580\u2580\u2580\u2580\n  Cursor Grok 4.5 High \u00b7 6.7%   Run Everything\n  ~/wt \u00b7 64cdd3a'
+  # Captured live from a herdr cursor pane. The glyphs are literal UTF-8 on
+  # purpose: stock macOS Bash 3.2 has no `\u` escape in printf or $'...', so an
+  # escaped fixture feeds the classifier the six ASCII bytes `\u2580` instead.
+  local screen esc out
   # The closing rule must bound the region, so the footer below is not input.
-  fm_composer_row_has_edge " $(printf '\u2580\u2580\u2580')" \
+  fm_composer_row_has_edge ' ▀▀▀' \
     || fail "a half-block rule row must count as a structural edge"
-  fm_composer_row_has_edge " $(printf '\u2584\u2584\u2584')" \
+  fm_composer_row_has_edge ' ▄▄▄' \
     || fail "the upper half-block rule must count as a structural edge"
-  # Non-vacuousness: the footer rows really are non-blank content that would be
-  # swallowed if the rule did not bound the region.
-  case "$plain" in *"Run Everything"*) : ;; *) fail "fixture lost its footer content" ;; esac
-  ESC_LOCAL=$(printf '\033')
-  screen=$'transcript\n \u2584\u2584\u2584\u2584\u2584\u2584\u2584\u2584\n'"  ${ESC_LOCAL}[2m\u2192 ${ESC_LOCAL}[0;7mA${ESC_LOCAL}[0;2mdd a follow-up${ESC_LOCAL}[0m"$'\n \u2580\u2580\u2580\u2580\u2580\u2580\u2580\u2580\n  Cursor Grok 4.5 High \u00b7 6.7%   Run Everything\n  ~/wt \u00b7 64cdd3a'
-  out=$(fm_composer_classify_screen "$CAPS_STYLED" "$(printf '%b' "$screen")")
+  esc=$(printf '\033')
+  screen=$'transcript\n ▄▄▄▄▄▄▄▄\n'"  ${esc}[2m→ ${esc}[0;7mA${esc}[0;2mdd a follow-up${esc}[0m"$'\n ▀▀▀▀▀▀▀▀\n  Cursor Grok 4.5 High · 6.7%   Run Everything\n  ~/wt · 64cdd3a'
+  # Non-vacuousness: the classified fixture really carries non-blank footer rows
+  # below the closing rule, which would be swallowed if the rule did not bound
+  # the region.
+  case "$screen" in *"Run Everything"*) : ;; *) fail "fixture lost its footer content" ;; esac
+  out=$(fm_composer_classify_screen "$CAPS_STYLED" "$screen")
   [ "$out" = empty ] \
     || fail "an idle cursor composer inside herdr half-block rules must read empty, got '$out'"
   pass "matrix: herdr half-block rules bound a bare composer's wrap region"

tests/fm-control-relaunch.test.sh

@@ -348,7 +348,7 @@ test_relaunch_serializes_concurrent_durable_metadata_publication() {
     FM_FAKE_TRACE_RELEASE="$launch_release" \
     run_control "$dir" rl28 relaunch --note "continue after publication" > "$dir/control.out" &
   control_pid=$!
-  while [ ! -e "$prepare" ] && [ "$i" -lt 200 ]; do
+  while [ ! -e "$prepare" ] && [ "$i" -lt 1000 ]; do
     /bin/sleep 0.01
     i=$((i + 1))
   done
@@ -367,7 +367,7 @@ test_relaunch_serializes_concurrent_durable_metadata_publication() {
       --carry-platform x --carry-max 280 > "$dir/link.out" 2>&1 &
   link_pid=$!
   i=0
-  while [ ! -e "$waiting" ] && [ "$i" -lt 200 ]; do
+  while [ ! -e "$waiting" ] && [ "$i" -lt 1000 ]; do
     /bin/sleep 0.01
     i=$((i + 1))
   done
@@ -380,7 +380,7 @@ test_relaunch_serializes_concurrent_durable_metadata_publication() {
   }
   : > "$launch_release"
   i=0
-  while [ ! -e "$ready" ] && [ "$i" -lt 200 ]; do
+  while [ ! -e "$ready" ] && [ "$i" -lt 1000 ]; do
     /bin/sleep 0.01
     i=$((i + 1))
   done
@@ -987,7 +987,7 @@ test_prepublication_failure_keeps_concurrent_durable_metadata() {
     run_control "$dir" rl30 relaunch --harness codex --note "preserve concurrent metadata" \
       > "$dir/control.out" &
   control_pid=$!
-  while [ ! -e "$dir/cwd-race-ready" ] && [ "$i" -lt 200 ]; do
+  while [ ! -e "$dir/cwd-race-ready" ] && [ "$i" -lt 1000 ]; do
     /bin/sleep 0.01
     i=$((i + 1))
   done