Initial public release — aci-sim v0.16.0

aci-sim is a stateful REST simulator of a 2-site Cisco ACI fabric
(per-site APIC + ND/NDO management planes) — for testing ACI automation
(Ansible cisco.aci / cisco.mso, aci-py, custom REST clients) and CI gates
without real hardware.

Highlights: APIC + NDO REST surface served from one in-memory MIT built
from a declarative topology.yaml; port mode + sandbox (real per-device IPs
on :443) run modes; LLDP/CDP neighbor visibility; NDO->APIC deploy mirror
(multi-site templates materialize onto the target sites' APIC stores);
real-APIC fvBD default attributes; file-backed state save/restore; an
`aci-sim` CLI (validate/show/graph/run/new/init/lldp); and an 888-test suite.

History squashed for the public release.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CLAUDE.md

@@ -0,0 +1,23 @@
+# aci-sim — project notes for Claude
+
+A faithful REST simulator of a 2-site Cisco ACI fabric (per-site APIC + one
+NDO/MSO plane), driven entirely by `topology.yaml`. Python 3.11+, FastAPI +
+uvicorn + Pydantic v2, in-memory MIT object store, no external dependencies.
+Full architecture/contract detail: `README.md`, `docs/CONTRACT.md` (the
+authoritative ACI/NDO REST behavior contract), `docs/DESIGN.md` (module map +
+design decisions + phase-by-phase build history).
+
+Two run modes: **port mode** (`scripts/run.sh`, shared bind + distinct ports
+8443/8444/8445) and **sandbox mode** (`scripts/sandbox-up.sh`, one loopback IP
+per device on `:443`, needed for NDO auto-discovery clients that hardcode
+port 443). Primary public use case: running Ansible `cisco.aci` playbooks
+against it directly — see `examples/ansible/`.
+
+Test suite: `.venv/bin/python -m pytest -q` (888 tests, must stay green).
+Lint: `ruff check .` (non-blocking in CI — pre-existing baseline, see
+`.github/workflows/ci.yml`).
+
+Version lives in `pyproject.toml`; changes are logged in `CHANGELOG.md`
+(newest entry at the top, `Keep a Changelog` format). The ACI/NDO object
+catalog is documented in `docs/CONTRACT.md` §6; environment variables in
+`README.md` §6.