Add devCorrectionLog.md, parallel sim horizons in L3

- .claude/devCorrectionLog.md: interaction pattern corrections for
  future instances (additive clarifications, no idle subagents, etc.)
- M3 hub L3: horizons run in parallel, not sequential
- Mention correction log in CLAUDE.md and all subdirectory AGENTS.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/devCorrectionLog.md

@@ -0,0 +1,33 @@
+# devCorrectionLog
+
+⊳ User gives **additive** clarifications. Only an explicit "no" is a replacement.
+⊳ Don't rewrite — append. Don't guess — ask or research first.
+⊳ Don't idle while subagents run.
+
+```yml
+corrections:
+  - epoch: 1783985662
+    failcase: "rewrote L3 seven times"
+    identifyBy: "treating every clarification as a full replacement"
+    instead: "append the new detail to existing text, preserve prior content"
+
+  - epoch: 1783985662
+    failcase: "idle during foreground subagent"
+    identifyBy: "ran research agent synchronously, did nothing while waiting"
+    instead: "run agents in background, continue editing other files"
+
+  - epoch: 1783985662
+    failcase: "guessed sim speed without research"
+    identifyBy: "accepted 360:1 then 3600:1 then 86400:1 without pushback"
+    instead: "research comparable systems before committing a number"
+
+  - epoch: 1783985662
+    failcase: "5 commits on one parameter"
+    identifyBy: "each clarification triggered a commit-push cycle"
+    instead: "accumulate related changes, commit once when stable"
+
+  - epoch: 1783985662
+    failcase: "never asked what economy organ was"
+    identifyBy: "wrote 8 wrong specs (text digestion) without asking"
+    instead: "ask what the thing is before designing it"
+```