Drop strategy/ as a division — it's playbooks/runbooks, not agents (#595)

strategy/ holds 16 markdown files and ZERO have agent frontmatter — they're
playbooks (playbooks/phase-*.md), runbooks (runbooks/scenario-*.md), and briefs
(EXECUTIVE-BRIEF.md, QUICKSTART.md, nexus-strategy.md), not agent definitions.
There are 16 real agent divisions, 232 agents; strategy is not one of them.

#592 added `strategy` to lint-agents.sh AGENT_DIRS and the lint workflow paths
(to match divisions.json), which made CI lint those 16 frontmatter-less docs as
agents and fail every one with "missing frontmatter opening ---". So any PR
touching strategy/ broke CI. The original lint-agents.sh correctly excluded
strategy; #592 misread that deliberate exclusion as drift (same mistake as
integrations/ in #593).

Fix: remove strategy from convert.sh / lint-agents.sh AGENT_DIRS, the lint
workflow, and divisions.json; add it to NON_DIVISION_DIRS in check-divisions.sh.
divisions.json is now 16, matching the app's parse_agent count exactly.

Also add a content-derived backstop to check-divisions.sh: every division must
contain at least one .md with '---' frontmatter, or the build fails. This is
what stops a docs/playbook directory from being registered as an empty agent
division again — regardless of whether someone remembers the exclude list.

check-divisions.sh PASSES at 16; negative-tested that re-adding strategy fails
with "division 'strategy' has no agent files".

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/check-divisions.sh

@@ -26,8 +26,10 @@ JSON="divisions.json"
 # root that is a directory is treated as a division (so a new division dir is
 # caught even if nobody remembered to register it).
 # integrations/ is convert.sh's OUTPUT tree (per-tool conversions written back
-# into the repo), not a source-agent category — it must never be scanned as one.
-NON_DIVISION_DIRS=(examples scripts integrations)
+# into the repo), not a source-agent category. strategy/ holds playbooks and
+# runbooks (no agent frontmatter), not agents. Neither is a division — they must
+# never be scanned as source-agent categories.
+NON_DIVISION_DIRS=(examples scripts integrations strategy)
 
 errors=0
 fail() { echo "ERROR $*"; errors=$((errors + 1)); }
@@ -104,6 +106,26 @@ while IFS= read -r div; do
   done
 done < <(canonical)
 
+# Every division must contain at least one agent file: a .md whose first line is
+# '---' frontmatter. This is the content-derived backstop that keeps a docs or
+# playbook directory (e.g. strategy/, all of whose files are frontmatter-less)
+# from being registered as an empty agent division.
+has_agent_file() {
+  local f first
+  while IFS= read -r f; do
+    first="$(head -1 "$f" | tr -d '\r')"
+    [[ "$first" == "---" ]] && return 0
+  done < <(find "$1" -name '*.md' -type f 2>/dev/null)
+  return 1
+}
+while IFS= read -r div; do
+  if [[ ! -d "$div" ]]; then
+    fail "division '$div' has no directory on disk"
+  elif ! has_agent_file "$div"; then
+    fail "division '$div' has no agent files (.md with '---' frontmatter) — not a real division"
+  fi
+done < <(canonical)
+
 # --- result ----------------------------------------------------------------
 
 count="$(canonical | wc -l | tr -d ' ')"

scripts/convert.sh

@@ -68,7 +68,7 @@ TODAY="$(date +%Y-%m-%d)"
 
 AGENT_DIRS=(
   academic design engineering finance game-development gis marketing paid-media product project-management
-  sales security spatial-computing specialized strategy support testing
+  sales security spatial-computing specialized support testing
 )
 
 # --- Usage ---

scripts/lint-agents.sh

@@ -26,7 +26,6 @@ AGENT_DIRS=(
   security
   spatial-computing
   specialized
-  strategy
   support
   testing
 )