Boundary Matrix

Boundary Matrix

Canonical doc: docs/boundary-matrix.md
Tracking: GitHub #3 / #18, Linear LIM-306 / LIM-589.

Layers (summary)

Layer	Example
Core SNN	neuromod
Sensory / extract	axon-encoder, engram-parser
Topology / train	synaptic-mesh, plasticity-lab
Reward	limbic-critic
Runtime host	brainstem-daemon
Deployment	silicon-bridge
Hardware RTL	silicon-hdl

Forbidden

• Domain product hard deps (trading/mining)
• Vendoring silicon-hdl RTL
• Full neuromod simulation pull solely to re-export dynamics
• Secrets / machine-local paths
• Reimplementing NIR HDF5 (use nir-rs later)

Sibling rules of thumb

• neuromod owns dynamics; silicon-bridge takes floats after training
• brainstem-daemon may use this library; this is not a daemon
• silicon-hdl is SoT for RAM widths and UART frames — coordinate parity across repos

Sequencing (planning)

1. Stable export traits + silicon-hdl docs
2. HDL interface alignment
3. Optional nir-rs consumer

---

Last updated: July 29, 2026 Updated by: Grok Build: Grok 4.5 Package tip reference: de069cd (main)