refactor(findings): split ALL-FINDINGS.md into per-experiment files

Break the monolithic 3249-line findings file into 29 individual files,
one per experiment. Each file is named YYYY-MM-DD-NN-slug.md for easy
chronological sorting and discovery.

No content changes — purely structural reorganization.

findings/2026-04-26-06-single-agent-cant-handle-1000.md

@@ -0,0 +1,20 @@
+# Finding 6: Single agent can't handle 1000+ line document generation (confirmed pattern)
+
+**Date:** 2026-04-26
+**Task:** DDD v2 forge analysis drafting
+**How we used them:** Single Sonnet/Opus sub-agents given full research
+material (~3,874 lines of research notes) + outline + instructions to write
+complete document. Very rich context (all research), very large output
+requirement (1000+ lines).
+
+- Five single-agent attempts died (OOM, disconnect, timeout) trying to write
+  full documents
+- Sectional approach (5 parallel Sonnet subagents, ~500-700 lines each)
+  succeeded immediately — each got same research but only their section's
+  outline
+- Same pattern when Claude Code attempted full Part V rewrite — died
+- Three agents × ~320 lines each worked first try
+- **Takeaway:** This is a confirmed, repeatable limit for generation tasks.
+  Not model-specific — it's a context/output length problem. Rich input
+  context is fine; it's the output length that kills. Break output into
+  sections, keep input context rich, draft in parallel, assemble.