37 lines
2.2 KiB
Markdown
37 lines
2.2 KiB
Markdown
<!-- GENERATED FROM prd.json — DO NOT EDIT AS AN INDEPENDENT SOURCE. prd.json IS AUTHORITATIVE. -->
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# DGR-031: Introduce the project-owned `ShardEngine` interface
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- **Status / triage:** completed; `passes: true`
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- **Execution mode:** `AFK`
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- **Milestone:** `M1`
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- **Dependencies:** `DGR-021`, `DGR-025`
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- **Blocks (derived):** `DGR-032`, `DGR-034`, `DGR-035`, `DGR-037`
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- **Labels:** `area:engine`, `type:architecture`, `priority:p0`, `ready-for-agent`
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- **Evidence class:** `model-free`
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- **Hardware:** `none`
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- **Model:** `generic`
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- **Upstream:** `no`
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## Objective / description
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Fresh Ralph session: read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md`, source issue `.scratch/distributed-gguf-runtime/issues/031-introduce-the-project-owned-shardengine-interface.md`, and evidence READMEs for dependencies (DGR-021, DGR-025) before changing code. Inspect live source/tests rather than trusting legacy pass states. Objective: Isolate worker/protocol code from llama.cpp internals behind a stable project-owned engine contract.
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## Acceptance criteria
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- [x] Define load, capabilities, prefill/decode, boundary/logits result, cancel, release, health, and metrics operations.
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- [x] Use project-owned request/result/state types; expose no `ggml_tensor`, llama context, scheduler, or ABI-owned structure.
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- [x] Reserve typed MTP and architecture auxiliary-state hooks without enabling them.
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- [x] Add contract tests proving fake and future llama implementations obey identical lifecycle semantics.
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- [x] Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff.
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## Shared quality gates
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- Targeted deterministic tests pass; Python changes also pass `python -m compileall packages tests`.
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- `git diff --check` passes.
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- Default tests are model-download-free, API-credit-free, and GPU-free.
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- Evidence README records exact changed files, commands/results, limitations, and dependency handoff; no fabricated evidence or inherited completion credit.
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## Evidence handoff
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Verified evidence: `.scratch/distributed-gguf-runtime/evidence/DGR-031/README.md`. Legacy evidence remains provenance only and grants no implementation completion credit.
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