chore: scaffold aura workspace and wire the skills dev-cycle

Cargo workspace aura-core -> aura-engine -> aura-cli (bin `aura`) plus nodes/ for hot-reloadable cdylib node crates. Crate bodies are intentionally API-free; types arrive from the first spec. Adds the skills profile (.claude/dev-cycle-profile.yml), the project CLAUDE.md with the eight domain invariants, and the design-ledger skeleton. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-03 01:31:14 +02:00
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+# aura design ledger — INDEX
+
+The ledger records the load-bearing design contracts and their rationale. Each
+entry is one contract: what it guarantees, what it forbids, and why.
+
+This is the place where the architecture settled during the initial rough-sketch
+interview will be written up as discrete contracts. Until those entries land, the
+authoritative summary of the invariants is the **Domain invariants** section of
+`CLAUDE.md`, and the cross-session rationale notes live in the project memory.
+
+## Contracts
+
+_(none yet — to be authored from the first spec onward)_
+
+## Open architectural threads not yet resolved
+
+- Visual playground form (leaning egui-native; deferred — the headless core
+  makes deferring it free).
+- Smarter parameter-space search strategies (Bayesian/genetic) as pluggable
+  policies atop the atomic sim unit.
+- Top-level `strategies/` split from reusable building blocks in `nodes/`.