docs: define distributed GGUF runtime plan

.scratch/distributed-gguf-runtime/issues/09-integrate-the-native-worker-with-meshnet.md

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+# 09 — Integrate the native worker with Meshnet
+
+Status: ready-for-agent
+
+## Mandatory fresh-session context
+
+- Read [RALPH-CONTEXT.md](../RALPH-CONTEXT.md) completely before changing code.
+- This issue is `DGR-009` in [prd.json](../prd.json).
+- Read the evidence README for every dependency listed below.
+- Inspect current code and `git status`; historical text and previous agent claims are not evidence.
+
+## Description
+
+As the existing node service, I need a GGUF Shard backend adapter so that the Tracker, relay, billing, telemetry, and capability admission remain the sole control plane.
+
+## Expected durable outputs
+
+- Meshnet GGUF backend adapter
+- Registration, routing, relay, telemetry and billing tests
+- evidence/DGR-009/README.md
+
+## Acceptance criteria
+
+- [ ] Implement the existing model-backend surface without changing Transformers behavior.
+- [ ] Registration carries exact validated GGUF recipe, Shard, backend and concurrency/KV capacity.
+- [ ] Tracker forms only complete compatible routes and keeps uncertified recipes dark.
+- [ ] Direct routes use gRPC streams; relayed routes carry the same versioned protobuf frames as opaque binary through the existing relay seam.
+- [ ] Existing request/work IDs, cancellation, Generation Telemetry, billing, and per-node attribution remain correlated.
+- [ ] No vLLM, Nakshatra, prima.cpp, or custom-engine control plane becomes a core dependency.
+- [ ] Targeted pytest tests pass
+- [ ] python -m compileall packages tests passes for Python changes
+- [ ] git diff --check passes
+- [ ] Default tests remain deterministic, model-download-free, API-credit-free, and GPU-free
+- [ ] Full deterministic pytest -q passes, or the exact pre-existing unrelated failure is recorded with a clean-tree reproduction
+- [ ] Pinned native C++ target builds and focused CTest/protocol tests pass where native code is touched
+- [ ] llama.cpp patch stack applies cleanly to the exact pinned commit where patch code is touched
+- [ ] Read .scratch/distributed-gguf-runtime/RALPH-CONTEXT.md and this story issue completely before changing code
+- [ ] Read and verify every dependency evidence README before relying on dependency behavior
+- [ ] Preserve all pre-existing working-tree changes and stage only files belonging to this story
+- [ ] Write .scratch/distributed-gguf-runtime/evidence/DGR-009/README.md with files changed, exact commands and real results, limitations, compatibility notes, and dependent-story handoff
+- [ ] Update only this story issue to Status: done after every acceptance criterion and quality gate passes
+
+## Dependency handoff
+
+- `DGR-003` must have `passes: true`; read `../evidence/DGR-003/README.md` and verify its referenced files/commands.
+- `DGR-008` must have `passes: true`; read `../evidence/DGR-008/README.md` and verify its referenced files/commands.
+
+## Finish contract
+
+- Create the task evidence directory and durable handoff required above.
+- Preserve real failures and blockers; never fabricate benchmark, model, test or hardware output.
+- Change this issue to `Status: done` only after all criteria pass.
+- Emit `<promise>COMPLETE</promise>` only after the evidence handoff exists.
+
+## References
+
+- [Ralph execution context](../RALPH-CONTEXT.md)
+- [PRD](../PRD.md)
+- [Implementation strategy](../implementation-strategy.md)
+- [Current architecture](../architecture.md)
+- [Architecture decision](../ADR-0020-distributed-gguf-runtime.md)