Add alpha-hardening ADRs and issue plan from pre-release audit.

Lock alpha scope, tracker auth, TOPLOC fraud verification, and deferred multi-tracker money-path work; supersede legacy fraud issues with ADR-0018.

Co-authored-by: Cursor <cursoragent@cursor.com>

.claude/memory/MEMORY.md

@@ -2,4 +2,5 @@
 
 - [Product selling points](product-selling-points.md) — key differentiators and landing page angles for neuron-tai
 - [User profile](user-profile.md) — who Dobromir is and how to work with him
-- [Project status](project-status.md) — 29/30 done; US-030 (manual route + hop benchmark) is the only open story
+- [Project status](project-status.md) — 35/35 stories done; alpha hardening next
+- **Alpha hardening** — `.scratch/alpha-hardening/` (22 issues, ADRs 0016–0019, [README](../.scratch/alpha-hardening/README.md), [handoff](../.scratch/alpha-hardening/handoff.md))

.claude/memory/project-status.md

@@ -23,6 +23,10 @@ Suite: 222 passed, 3 skipped (openai/langchain packages missing in .venv — pre
 **Why:** design locked in ADR-0015 (USDT custodial settlement; TAI deferred, protocol cut = future TAI liquidity).
 **How to apply:** next steps are live devnet verification (run devnet_setup.py, start tracker with --solana-rpc-url/--usdt-mint/--treasury-keypair --billing-db), then the TAI mint when volume justifies it. Work not yet committed to git as of session end — check git status.
 
+## Alpha hardening (2026-07-04)
+
+Planning complete in `.scratch/alpha-hardening/`: research report, ADRs 0016–0019, 22 issue files, README + handoff. **Bucket 1 trust-boundary blockers** (auth, persistence, starting credit, accounting, wallet binding) are next before fraud arc (TOPLOC, bisection, reputation routing). Prod audit thresholds gated on issue 21 (honest-noise calibration corpus).
+
 ## Windows CUDA node (working as of 2026-07-01)
 - miniforge3 base env, torch 2.7.1+cu118, torchvision 0.22.x+cu118
 - RTX 4060 Laptop GPU, 8 GB VRAM, benchmark index ~11,200