# Iteration 2 Log

## Metadata

- **Task ID**: DGR-007
- **Task Title**: Add isolated concurrent local Hot KV State
- **Description**: MANDATORY FRESH-SESSION CONTEXT: Read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md` and `.scratch/distributed-gguf-runtime/issues/07-add-isolated-concurrent-local-hot-kv-state.md` completely be...
- **Status**: completed
- **Task Completed**: Yes
- **Promise Detected**: Yes
- **Started At**: 2026-07-15T18:35:22.255Z
- **Ended At**: 2026-07-15T19:03:13.254Z
- **Duration**: 27m 50s
- **Input Tokens**: 277
- **Output Tokens**: 80139
- **Total Tokens**: 80416
- **Agent**: claude
- **Model**: claude-opus-4-8
- **Sandbox Mode**: auto
- **Sandbox Network**: Enabled
--- RAW OUTPUT ---
I'll start by reading the mandatory context files before touching any code.
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/issues/07-add-isolated-concurrent-local-hot-kv-state.md
Now let me read the dependency evidence (DGR-006) and progress/context files.
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-006/README.md
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.ralph-tui/progress.md
Let me examine the key existing modules I'll build on.
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/boundary_adapter.py
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/runtime_recipe.py
Now let me look at the gguf_ownership module (DGR-005) since KV must be allocated only for owned layers.
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/gguf_ownership.py
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_boundary_adapter.py
Let me check for any existing KV-related code and the test conventions.
[Bash] $ ls packages/node
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_gguf_ownership.py
There's an existing `tests/test_kv_cache_distributed.py`. Let me inspect it and check the DGR-007 evidence dir state.
[Bash] $ [print(json.dumps(t,indent=1)) for t in d.get('tasks',d if isinstance(d,list) else []) if isinstance...
Let me examine the existing `SessionCacheStore` in model_backend.py and the prd structure.
[Bash] $ print(list(d.keys()) if isinstance(d,dict) else len(d))"
[Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/model_backend.py
I have a thorough understanding now. Let me set up the todo list and check the DGR-005 evidence briefly, then write the module.
[Bash] $ print(numpy.__version__)" 2>&1

[Error: Exit code 127
# DGR-005 — dense-Llama range-aware GGUF ownership evidence

Status: done
Date: 2026-07-15
Evidence kind: **synthetic-unit + repo checks**. No model download, no GPU, no network, no API credits.

## Summary

Implemented range-aware dense-Llama ownership so the node reports and admits only the tensors it actually loads:

- `blk.N.*` tensors are selected strictly by assigned layer range.
- Embeddings are owned at the head only, while final norm / LM head are owned at the tail only, including tied embeddings.
- Derivative sub-GGUF slices must carry source and slice hashes and cannot claim final artifact semantics.
- The authoritative loaded range and endpoint ownership now come from backend proof state, not CLI shard claims.
- Registration, capability reports, admission fingerprints, and tracker state now carry the backend-derived ownership proof.

The result is a shard model that can reason about memory and admission from owned tensors instead of pretending the full model was loaded.

## Files changed

- `packages/node/meshnet_node/gguf_ownership.py` - dense-Llama tensor selection and authoritative ownership helpers.
- `packages/node/meshnet_node/capability.py` - shard reports now carry endpoint ownership and parse it round-trip.
- `packages/node/meshnet_node/doctor.py` - capability reports now use backend-derived loaded range and endpoint ownership.
- `packages/node/meshnet_node/testing.py` - test capability reports now mirror the authoritative ownership path.
- `packages/node/meshnet_node/admission.py` - admission compatibility fingerprints now include authoritative range/ownership context.
- `packages/node/meshnet_node/model_backend.py` - loaded-range and endpoint-ownership properties on `TorchModelShard`.
- `packages/node/meshnet_node/startup.py` - registration payloads now use the proof-driven shard range.
- `packages/tracker/meshnet_tracker/capability.py` - tracker capability state preserves endpoint ownership.
- `tests/test_gguf_ownership.py` - dense-Llama ownership selection, derivative-slice guard, and memory-scaling tests.
- `tests/test_node_capability.py` - capability report ownership round-trip tests.
=== python ver ===
/bin/bash: line 1: .venv/bin/python: No such file or directory
Python 3.11.15
=== numpy ===
/bin/bash: line 1: .venv/bin/python: No such file or directory]
[Bash] $ sed -n '1,40p' conftest.py
[Bash] $ /run/media/popov/d/DEV/repos/d-popov.com/AI/.venv/bin/python --version 2>&1
[Bash] $ $VP -m pytest -q tests/test_boundary_adapter.py 2>&1 | tail -5
Harness confirmed. Now let me write the production module.
[Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/hot_kv_state.py """"Isolated concurrent local Hot KV State for distributed Shards (DGR-007).

Hot KV State stays local to the node serving a Shard (RALPH runtime decision #7).
A concurrent server must map each ``(Rout... (35714 chars)"
Now the test module. Let me write a KV-cached dense-Llama reference and comprehensive tests.
[Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_hot_kv_state.py """"Isolated concurrent local Hot KV State (DGR-007).

These tests prove the KV/session manager with a *pure-numpy* KV-cached dense-Llama
reference: no download, no GPU, no torch, no API credit. The re... (29450 chars)"
Now let me run the tests.
[Bash] $ $VP -m pytest -q tests/test_hot_kv_state.py 2>&1 | tail -40
All 22 pass. Let me run the quality gates.
[Bash] $ $VP -m pytest -q tests/test_boundary_adapter.py tests/test_gguf_ownership.py 2>&1 | tail -3
All gates green so far. Now the full deterministic suite to confirm my additions don't perturb the pre-existing failure set.
[Bash] $ $VP -m pytest -q -rfE 2>&1 | tail -45

[Error: Exit code 143
Command timed out after 2m 0s]
The full suite needs more than 2 min. Let me run it in the background and capture to a file.
[Bash] $ tail -3 /tmp/dgr007_full.log
While that runs, let me record the targeted test command output for evidence and write the evidence README.
[Bash] $ $VP -m pytest -q tests/test_hot_kv_state.py 2>&1 | tail -2
[Bash] $ $VP -m pytest tests/test_hot_kv_state.py --collect-only -q 2>&1 | head -25
Let me check on the full-suite run.
[Bash] $ ls -la /tmp/dgr007_full.log

[Error: <tool_use_error>Blocked: sleep 90 followed by: tail -5 /tmp/dgr007_full.log echo "---running?---" ls -la /tmp/dgr007_full.log. To wait for a condition, use Monitor with an until-loop (e.g. `until <check>; do sleep 2; done`). To wait for a command you started, use run_in_background: true. Do not chain shorter sleeps to work around this block.</tool_use_error>]
[Read] /tmp/dgr007_full.log
It's at 9%; it'll take a few more minutes. I'll draft the evidence files now and fill in the full-suite numbers when the run finishes. Let me write the commands and README.
[Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/commands.txt "# DGR-007 — exact commands (run from the worktree root).
# Python: /run/media/popov/d/DEV/repos/d-popov.com/AI/.venv (Python 3.14.6, numpy 2.4.4).
# Root conftest.py adds packages/* to sys.path, so `m... (1182 chars)"
[Read] /tmp/dgr007_full.log
[Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/README.md "# DGR-007 — Isolated concurrent local Hot KV State: evidence

Status: done
Date: 2026-07-15
Evidence kind: **synthetic-unit** (pure-numpy KV-cached dense-Llama reference +
session/KV manager). No mode... (12056 chars)"
[Read] /tmp/dgr007_full.log
While the full suite runs, let me update `progress.md`.
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.ralph-tui/progress.md edit: "- **Pre-existing full-suite failures on this branc..." → "- **Pre-existing full-suite failures on this branc..."
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.ralph-tui/progress.md edit: "- Evidence: `.scratch/distributed-gguf-runtime/evi..." → "- Evidence: `.scratch/distributed-gguf-runtime/evi..."
[Read] /tmp/dgr007_full.log
[Bash] $ tail -3 /tmp/dgr007_full.log
Full suite finished: `13 failed, 755 passed, 14 skipped` (note: the error set differs from the DGR-006-era baseline — environment appears to have changed). I must verify my changes introduce **no new failures**. Let me capture the failing set, then run the clean-tree reproduction.
[Bash] $ echo "count: $(wc -l < /tmp/dgr007_fails.txt)"
All 13 failures are pre-existing tracker/routing/benchmark/toploc/doctor tests — none touch KV work, and my 22 tests are in the passed count. Now the required clean-tree reproduction (move my two files aside, expect the identical 13 failures and passed count −22).
[Bash] $ tail -2 /tmp/dgr007_clean.log
[Bash] $ diff /tmp/dgr007_fails.txt /tmp/dgr007_clean_fails.txt && echo "IDENTICAL FAILURE SET"
The clean-tree run finished. Let me get my comparison loop's result.
[Bash] $ ls packages/node/meshnet_node/hot_kv_state.py tests/test_hot_kv_state.py
Identical failure set; passed count differs by exactly 22 (my tests). Files restored. Let me confirm the restore is intact and update the evidence README with the real numbers.
[Bash] $ git status --short | grep -E "hot_kv_state|test_hot_kv_state|evidence/DGR-007|progress.md"
Now let me update the README placeholders with the real full-suite numbers.
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/README.md edit: "- **Full deterministic pytest** — `PLACEHOLDER_FUL..." → "- **Full deterministic pytest** — `13 failed, 755 ..."
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/README.md edit: "$VP -m pytest -q -rfE
# -> PLACEHOLDER_FULL

# Cle..." → "$VP -m pytest -q -rfE
# -> 13 failed, 755 passed, ..."
Let me correct the pre-existing-failures section in the README to match the actual observed set (no protobuf errors in this run; 13 failures).
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/README.md edit: "`pytest -q` on `ralph/distributed-gguf-runtime` re..." → "`pytest -q -rfE` on `ralph/distributed-gguf-runtim..."
Now let me save a machine-readable results.json and mark the issue done.
[Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-007/results.json "{
  "task_id": "DGR-007",
  "title": "Add isolated concurrent local Hot KV State",
  "status": "done",
  "date": "2026-07-15",
  "evidence_kind": "synthetic-unit",
  "python": "/run/media/popov/d/DEV/... (2776 chars)"
Now update the source issue status to done.
[Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/issues/07-add-isolated-concurrent-local-hot-kv-state.md edit: "# 07 — Add isolated concurrent local Hot KV State
..." → "# 07 — Add isolated concurrent local Hot KV State
..."
Let me verify the DGR-006 issue convention for checkboxes and confirm final working-tree state is scoped correctly.
[Bash] $ import re for s in d['userStories']:   if s.get('id') in ('DGR-006','DGR-007'): print(s.get('id'), '...
Matches the DGR-006 precedent (Status: done, checkboxes left, `passes` managed by the harness — I leave prd.json untouched). Final verification of scope:
[Bash] $ git status --short | grep -vE "hot_kv|DGR-007|07-add-isolated|progress.md" | head -40
`.ralph-tui/progress.md` didn't appear in the status output — let me confirm my progress.md edit persisted (it may be gitignored, which is fine — RALPH excludes `.ralph-tui`).
[Bash] $ ls -1 .scratch/distributed-gguf-runtime/evidence/DGR-007/
All quality gates pass and the work is complete. Summary of DGR-007:

## DGR-007 — Isolated concurrent local Hot KV State ✅

**New files (purely additive):**
- `packages/node/meshnet_node/hot_kv_state.py` — the KV/session manager
- `tests/test_hot_kv_state.py` — 22 tests + a pure-numpy KV-cached dense-Llama reference

**What it delivers:**
- **`HotKvStateManager`** maps `(session_id, route_epoch)` → an isolated `SessionCache`, allocating `LayerKvCache` **only for owned layers**. It owns all cache mutation so eviction/accounting/isolation live in one place.
- Full lifecycle: `open`/`append` (prefill + decode), `truncate`, `release`, plus **TTL + LRU (session-cap and byte-budget) eviction** and an explicit, serializable `CacheMiss` (unknown / evicted-ttl / evicted-lru / released / superseded-epoch / seq-len-mismatch) so the head re-prefills from token zero instead of corrupting output.
- **Fails closed on identity:** stale route epochs → `StaleRouteEpochError`; mismatched KV recipe → `IncompatibleCacheRecipeError`; uncertified architecture → fails closed at recipe construction (reuses the DGR-006 gate).
- **`KvBoundaryAdapter`** wraps the DGR-006 `ShardComputation` (+`run_layers_cached`) to run cached prefill/decode through the manager while honouring the boundary contract.

**Correctness proof:** a KV-cached numpy dense-Llama (absolute-position causal mask over cached keys, post-RoPE key storage) reproduces stateless whole-model greedy tokens **bit-for-bit**, single-range and across a head/tail seam. Four sessions (interleaved round-robin **and** four real OS threads) decode with no cross-talk; releasing one returns memory to budget and leaves the others matching their references.

**Gates (real results):**
- Targeted: `22 passed`
- `compileall packages tests`: exit 0 · `git diff --check`: exit 0
- Full suite with files: `13 failed, 755 passed, 14 skipped`; clean-tree repro (files moved aside): `13 failed, 733 passed` — **identical FAILED set, passed −22**, so no new failures. All 13 are pre-existing tracker/routing/benchmark/toploc/doctor env failures, none touch KV. (No native C++/llama.cpp code touched — those gates are N/A, wired in DGR-008.)

**Evidence:** `.scratch/distributed-gguf-runtime/evidence/DGR-007/{README.md,commands.txt,results.json}`; issue set to `Status: done`; `progress.md` updated. Pre-existing working-tree changes preserved; no commits created (left for manual review).

<promise>COMPLETE</promise>