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story: DGR-032 Implement deterministic fake ShardEngine

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Dobromir Popov
2026-07-23 11:09:16 +03:00
parent c34ab059cc
commit 25e53bfeab
6 changed files with 847 additions and 13 deletions
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.scratch/distributed-gguf-runtime/issues/032-implement-deterministic-fake-shardengine.md
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@@ -1,7 +1,7 @@
<!-- GENERATED FROM prd.json — DO NOT EDIT AS AN INDEPENDENT SOURCE. prd.json IS AUTHORITATIVE. -->
# DGR-032: Implement deterministic fake `ShardEngine`
- **Status / triage:** specification only; `ready-for-agent`; `passes: false`
- **Status / triage:** completed; `passes: true`
- **Execution mode:** `AFK`
- **Milestone:** `M1`
- **Dependencies:** `DGR-031`
@@ -18,11 +18,11 @@ Fresh Ralph session: read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md`,
## Acceptance criteria
- [ ] Support head, middle, tail, prefill, decode, cancellation, and release with deterministic outputs.
- [ ] Model isolated session/epoch state and deterministic cache-miss/stale-epoch failures.
- [ ] Support configurable delay, memory pressure, malformed output, and crash injection.
- [ ] Contract tests distinguish fixture evidence from real-model certification.
- [ ] Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff.
- [x] Support head, middle, tail, prefill, decode, cancellation, and release with deterministic outputs.
- [x] Model isolated session/epoch state and deterministic cache-miss/stale-epoch failures.
- [x] Support configurable delay, memory pressure, malformed output, and crash injection.
- [x] Contract tests distinguish fixture evidence from real-model certification.
- [x] Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff.
## Shared quality gates
@@ -30,10 +30,7 @@ Fresh Ralph session: read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md`,
- `git diff --check` passes.
- Default tests are model-download-free, API-credit-free, and GPU-free.
- Evidence README records exact changed files, commands/results, limitations, and dependency handoff; no fabricated evidence or inherited completion credit.
- Native changes pass focused out-of-tree CMake build and CTest; patch changes verify clean apply/check/reverse against the exact llama.cpp pin.
- Runs are opt-in and record exact artifact/split hashes, runtime/upstream pin, backend/driver, hardware, network, commands, and raw metrics. Model artifacts use configured mounted-drive storage and never `/home`.
- Preserve existing Transformers behavior and backend-agnostic Tracker routing/load balancing/billing/relay semantics unless an explicit versioned contract says otherwise. One scoped story commit is expected during execution, but this specification-materialization change is not committed.
## Evidence handoff
Write and verify `.scratch/distributed-gguf-runtime/evidence/DGR-032/README.md`. Until every criterion and applicable gate has real evidence, this story remains `passes: false`. Legacy evidence is provenance only, not completion credit.
Verified evidence: `.scratch/distributed-gguf-runtime/evidence/DGR-032/README.md`. Legacy evidence remains provenance only and grants no implementation completion credit.