issues, chat FPS; optimisations

.scratch/distributed-inference-performance/issues/01-baseline-profiling-harness.md

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+Status: ready-for-agent
+
+# 01 — Baseline and profiling harness
+
+## What to build
+
+Create a deterministic stub-backed benchmark for a Route Session that measures
+prefill and cached decode across direct and relay paths. Attribute time to model
+execution, activation encoding/decoding, compression, connection setup, relay
+queueing, local HTTP forwarding, and end-to-end seam latency. Record payload
+sizes and connection counts without requiring a real model or external host.
+
+## Acceptance criteria
+
+- [ ] The harness runs a fixed prompt and fixed generated-token count through a
+  two-node route in direct and relay modes.
+- [ ] It reports p50/p95 per-token latency, per-hop latency, payload bytes,
+  compression ratio, connection attempts, and queue wait.
+- [ ] It distinguishes prefill from decode and cached from stateless mode.
+- [ ] It emits machine-readable JSON suitable for CI artifacts and a concise
+  human-readable summary.
+- [ ] A test fixture can assert connection attempts and output token identity.
+
+## Blocked by
+
+None - can start immediately.
+