# Iteration 1 Log

## Metadata

- **Task ID**: DGR-002
- **Task Title**: Adopt the versioned gRPC Shard protocol
- **Description**: MANDATORY FRESH-SESSION CONTEXT: Read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md` and `.scratch/distributed-gguf-runtime/issues/02-adopt-the-versioned-grpc-shard-protocol.md` completely befor...
- **Status**: completed
- **Task Completed**: Yes
- **Promise Detected**: Yes
- **Started At**: 2026-07-15T13:15:13.978Z
- **Ended At**: 2026-07-15T13:55:00.867Z
- **Duration**: 39m 46s
- **Input Tokens**: 557
- **Output Tokens**: 97325
- **Total Tokens**: 97882
- **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 doing anything else.
[94m[Read][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md[0m
[94m[Read][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/issues/02-adopt-the-versioned-grpc-shard-protocol.md[0m
Now let me read the required additional context and inspect current state.
[94m[Read][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.ralph-tui/progress.md[0m
[94m[Read][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/docs/adr/0024-distributed-gguf-runtime.md[0m
[94m[Bash][0m Check git status and current branch $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI && git status && echo "---BRANCH---" && git branch --...
I ran that in the main repo, not the worktree. Let me check the worktree state, which is my actual working directory.
[94m[Bash][0m Check worktree git status $ git status && echo "---BRANCH---" && git branch --show-current && echo "---LOG---" && git log --onel...
The worktree is correct. There's a pre-existing deletion of `.ralph-tui/config.toml` I must preserve. Let me check the prd.json for DGR-002 and whether any native/proto work already exists.
[94m[Bash][0m Check existing native protocol work $ echo "=== evidence dirs ===" && ls .scratch/distributed-gguf-runtime/evidence/ 2>/dev/null
[94m[Bash][0m Inspect DGR-002 in prd.json $ print(list(d.keys()))"
No prior DGR-002 work exists. Let me inspect the prd.json structure and key existing code seams.
[94m[Bash][0m Find DGR-002 in prd.json $ python3 -c " import json d=json.load(open('.scratch/distributed-gguf-runtime/prd.json')) print('TOP ...
Let me check DGR-002 dependencies/passes state, the existing activation compression seam for tensor framing conventions, and Python tooling availability.
[94m[Bash][0m Check deps and proto tooling $ python3 --version
Important: `grpcio-tools`/`grpc` and `protoc` are missing, and I'm on the hermes-agent venv. Let me find the project's actual venv and tooling.
[94m[Bash][0m Find project venv and proto tooling $ print('protobuf OK', google.protobuf.__version__)" 2>&1 | tail -1   fi done
[94m[Bash][0m Find venvs and pytest config $ head -30 tests/test_route_session_benchmark.py 2>/dev/null
[94m[Bash][0m Check .venv tooling and conftest $ grep -iE "grpc|protobuf|pytest|python_requires|requires-python" pyproject.toml | head -20
The `.venv` (Python 3.14) has grpcio-tools, grpcio 1.82.1, protobuf 7.35.1. That's the test environment. Let me read the pytest config and inspect key existing seams for conventions.
[94m[Bash][0m Pytest config, C++ tooling, activation compression conventions $ print(os.path.dirname(grpc_tools.__file__))" echo "=== activation_compression head ===" sed -n '1,60...
g++ exists but no `protoc`, `grpc_cpp_plugin`, or `cmake` on PATH. Let me check for protobuf C++ headers/libs and whether grpc_tools' bundled protoc can emit C++.
[94m[Bash][0m Check protobuf C++ dev libs and cpp codegen $ } EOF $ROOT/.venv/bin/python -m grpc_tools.protoc -I. --cpp_out=. _p.proto 2>&1 && ls -la _p.pb.* 2>...
`grpc_tools.protoc` can't emit C++ (no bundled cpp generator), there's no standalone `protoc`, no `grpc_cpp_plugin`, no `cmake`, and no protobuf C++ headers (`/usr/include/google/protobuf` absent — only the runtime `.so`). So the C++ build/test can't be *executed* here, but I can still write reproducible C++ generation/build wiring + test source and gate it to skip honestly. Let me inspect package conventions and gitignore.
[94m[Bash][0m Inspect package conventions and gitignore $ echo "=== meshnet_node package ===" ls packages/node/meshnet_node/ | head -40 echo "=== has __init__...
`.gitignore` already ignores `build/` globally, so I'll generate Python stubs on-demand into a gitignored build dir. Now I have full context. Let me set up a task list and write the schema.
[94m[ToolSearch][0m query: [93mselect:TaskCreate,TaskUpdate[0m
[94m[TaskCreate][0m Author packages/node/native/proto/shard_runtime.proto with capability/health/session-stream/release/cancel services, versioned header, named-tensor bundle, prefill chunking + decode fast path, flow control, structured status.
[94m[TaskCreate][0m native_protocol package: on-demand grpc_tools codegen into gitignored build dir, loader, checksum/fragment helpers. Reproducible standalone generate script.
[94m[TaskCreate][0m CMakeLists + generate_cpp.sh + roundtrip_test.cpp, reproducible where protoc/grpc/cmake exist; gated skip otherwise.
[94m[TaskCreate][0m tests/test_native_shard_protocol.py: round-trip, forward/backward compatibility (unknown field preservation), field coverage, and C++ driver that skips when toolchain absent.
[94m[TaskCreate][0m Run pytest targeted+full, compileall, git diff --check; write evidence/DGR-002/README.md; append progress.md; set issue Status: done.
[94m[TaskUpdate][0m
Now the schema. This is the core semantic contract.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/proto/shard_runtime.proto[0m "// Shard runtime data-plane protocol for the distributed GGUF runtime (ADR-0024).
//
// This schema is the semantic contract between Python and C++ Shards. Direct
// transport is gRPC over HTTP/2; the... (13448 chars)"
Let me validate the proto compiles with grpc_tools before building the rest around it.
[94m[Bash][0m Validate proto codegen and round-trip $ sa2.ParseFromString(raw) print('roundtrip which', sa2.WhichOneof('payload'), sa2.prefill.header.work...
Proto compiles and round-trips cleanly. Now the Python loader package.
[94m[TaskUpdate][0m
[94m[TaskUpdate][0m
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/native_protocol/__init__.py[0m """"Loader and helpers for the versioned gRPC Shard protocol (ADR-0024, DGR-002).

The ``.proto`` schema at ``packages/node/native/proto/shard_runtime.proto`` is the
single source of truth. Rather than... (10287 chars)"
Now the reproducible standalone Python generation script, then verify the loader.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/scripts/generate_python.py[0m "#!/usr/bin/env python3
"""Reproducibly generate the Python Shard-protocol stubs from the schema.

This is the documented, no-manual-copy generation entry point referenced by
``evidence/DGR-002/README.... (1197 chars)"
[94m[Bash][0m Run generation script and smoke test loader/helpers $ sys.path.insert(0,'packages/node') from meshnet_node import native_protocol as proto pb2 = proto.loa...
[94m[Bash][0m Read background output $ cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-...
The standalone script hit a real gotcha: `import meshnet_node` resolved to the **main repo** checkout, not the worktree. Let me investigate how `meshnet_node` is installed so tests in the worktree resolve correctly.
[94m[Bash][0m Investigate meshnet_node install method $ print(meshnet_node.__file__)"
Good — `insert(0)` of the worktree path does win over the editable finder. Let me debug why the script resolved differently, then make it self-contained.
[94m[Bash][0m Check parents[2] resolution $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python -c " import pathlib f = p...
[94m[Bash][0m Re-run generate script $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python packages/node/native/scri...
Running as a script puts the script's own dir on `sys.path[0]`, and the editable finder then wins for `meshnet_node`. I'll make the script self-contained (no `meshnet_node` import). First let me confirm the pytest-style import path resolves to the worktree.
[94m[Bash][0m Confirm pytest-style import resolves to worktree $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime echo "=== mimic conftest: insert worktree packag...
Confirmed: pytest-style import resolves to the worktree correctly. The script just shouldn't import `meshnet_node`. Let me rewrite it self-contained.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/scripts/generate_python.py[0m "#!/usr/bin/env python3
"""Reproducibly generate the Python Shard-protocol stubs from the schema.

This is the documented, no-manual-copy generation entry point referenced by
``evidence/DGR-002/README.... (2315 chars)"
[94m[Bash][0m Run self-contained generate script from clean state $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime rm -rf packages/node/native/build $ROOT/.venv/bi...
Python codegen works. Now the C++ generation/build wiring and test.
[94m[TaskUpdate][0m
[94m[TaskUpdate][0m
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/tests/roundtrip_test.cpp[0m "// C++ round-trip and cross-language compatibility test for the Shard protocol.
//
// Modes (composable):
//   --selftest         serialize a sample message, parse it back, verify fields.
//   --read ... (6216 chars)"
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/CMakeLists.txt[0m "# Reproducible C++ build wiring for the Shard runtime protocol (DGR-002).
#
# This generates C++ message stubs from proto/shard_runtime.proto and builds the
# round-trip / cross-language compatibility... (1919 chars)"
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/scripts/generate_cpp.sh[0m "#!/usr/bin/env bash
# Reproducibly generate the C++ Shard-protocol stubs from the schema.
#
# Produces message stubs (protoc --cpp_out) always, and gRPC C++ service stubs
# (protoc --grpc_out with grp... (1497 chars)"
[94m[Bash][0m Make generate_cpp.sh executable $ chmod +x /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/pack...
Now the Python test suite that also drives the C++ test cross-language when the toolchain is present.
[94m[TaskUpdate][0m
[94m[TaskUpdate][0m
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_shard_protocol.py[0m """"DGR-002: generated-schema round-trip and compatibility tests.

Covers the versioned gRPC Shard protocol (``packages/node/native/proto``):
  * Python round-trip across the full envelope, tensor bund... (18016 chars)"
Let me remove the unused `struct` import noise.
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_shard_protocol.py[0m edit: "import shutil
import struct
import subprocess" → "import shutil
import subprocess"
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_shard_protocol.py[0m edit: "            out.append(byte)
            return by..." → "            out.append(byte)
            return by..."
Now run the new test suite with the project `.venv`.
[94m[Bash][0m Run new protocol tests $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python -m pytest tests/test_nati...
[94m[Bash][0m Read pytest output $ cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-...
[94m[Bash][0m Read pytest output again $ cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-...
[94m[Bash][0m Inspect output file $ cat "$f"
The background pipe swallowed output. Let me run it in foreground.
[94m[Bash][0m Run protocol tests foreground $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python -m pytest tests/test_nati...
[94m[Bash][0m Read test output $ cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-...
[94m[Read][0m [95m/tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-runtime/6b866acc-b779-4367-8360-3bff20c070ab/tasks/brvpcxpc7.output[0m
Let me run it writing to an explicit log file to avoid the pipe buffering issue.
[94m[Bash][0m Run tests to log file $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python -m pytest tests/test_nati...
The harness is auto-backgrounding these runs. I'll wait for completion.
[94m[Bash][0m Wait and read test log $ cat /tmp/dgr002_test.log 2>/dev/null
One failure. Let me wait for the full run to finish and see which test failed.
[94m[Bash][0m Read full test log $ cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-...
[94m[Bash][0m Check for running pytest processes $ ps aux | grep -c "[p]ytest"
Multiple runs are hung at the same point. Let me kill them and isolate the hang.
[94m[Bash][0m Kill hung pytest processes $ pgrep -af "pytest tests/test_native_shard" | wc -l

[91m[Error: Exit code 144][0m
Two real bugs found: (1) `load_grpc()` deadlocks because `threading.Lock` is non-reentrant and `load()` re-acquires it (that's the "hang" at test 11), and (2) the unknown-fields test failed. Let me fix the lock first.
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/meshnet_node/native_protocol/__init__.py[0m edit: "_lock = threading.Lock()" → "# Reentrant: load_grpc() holds the lock and calls ..."
Now diagnose the unknown-fields failure with a short-timeout foreground run.
[94m[Bash][0m Diagnose failing and hanging tests with timeout $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime timeout 60 $ROOT/.venv/bin/python -m pytest "tes...
The `service_descriptor` test now passes (RLock fixed the deadlock). The unknown-fields test failed because protobuf 7.x's upb backend doesn't implement the `UnknownFields()` accessor. I'll verify preservation behaviorally (re-serialize and confirm the bytes survive), which is the actual compatibility guarantee and backend-agnostic.
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_shard_protocol.py[0m edit: "    parsed = pb2.MessageHeader()
    parsed.ParseF..." → "    parsed = pb2.MessageHeader()
    # Parsing mus..."
[94m[Bash][0m Run full protocol test suite $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime timeout 120 $ROOT/.venv/bin/python -m pytest tes...
11 passed, 1 skipped (C++ cross-language — toolchain absent). Let me search the whole system for any protoc/cmake/protobuf headers so I can actually *execute* the C++ test rather than only ship it.
[94m[Bash][0m Search system for protoc, cmake, protobuf headers $ find /run/media/popov/d/DEV/repos/d-popov.com/AI/.venv -name 'protoc*' 2>/dev/null | head
A full protobuf C++ toolchain exists under `/tmp/pbsrc/install/` and `cmake` is in the `.venv`. I can actually *execute* the C++ cross-language test to produce real evidence. Let me verify that toolchain.
[94m[Bash][0m Inspect /tmp/pbsrc protobuf toolchain $ find /tmp/pbsrc/install -name 'protobuf-config.cmake' -o -name 'ProtobufConfig.cmake' 2>/dev/null | ...
A complete self-consistent protobuf 33.1 toolchain (protoc + headers + static libs + CMake config) is at `/tmp/pbsrc/install`, and cmake is in `.venv`. I can run the C++ test for real. Let me make the CMakeLists robust to both CONFIG and MODULE protobuf discovery so it works here and elsewhere.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/CMakeLists.txt[0m "# Reproducible C++ build wiring for the Shard runtime protocol (DGR-002).
#
# Generates C++ message stubs from proto/shard_runtime.proto and builds the
# round-trip / cross-language compatibility test... (2707 chars)"
Now run the real cross-language C++ test via the `/tmp/pbsrc` toolchain and `.venv` cmake.
[94m[Bash][0m Run C++ cross-language test with real toolchain $ echo "which protoc: $(command -v protoc)  ($(protoc --version))" timeout 300 $ROOT/.venv/bin/python ...
Good progress — cmake configured and protobuf was found; the only issue is embedded quotes in the `--proto_path="..."` args under `VERBATIM` (protoc took the quotes literally). Let me remove them.
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/CMakeLists.txt[0m edit: "  COMMAND "${SHARD_PROTOC_EXECUTABLE}"
          -..." → "  COMMAND "${SHARD_PROTOC_EXECUTABLE}"
          "..."
[94m[Bash][0m Re-run C++ cross-language test $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime export PATH="/tmp/pbsrc/install/bin:$ROOT/.venv/...
The C++ cross-language round-trip **passes for real** — Python↔C++ both directions verified with protoc 33.1 + libprotobuf. Let me capture a standalone build+selftest and the generate_cpp.sh output for durable evidence.
[94m[Bash][0m Standalone C++ build, selftest, ctest, generate_cpp.sh $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime export PATH="/tmp/pbsrc/install/bin:$ROOT/.venv/...
Full C++ path works: build OK, selftest 128 bytes, ctest 1/1 passed. Now the quality gates.
[94m[TaskUpdate][0m
[94m[TaskUpdate][0m
[94m[Bash][0m Run compileall, git diff check, verify ignores $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime echo "=== git status (are build artifacts ignore...
`native/` and `native_protocol/` are new (untracked), build artifacts are ignored, and the pre-existing `.ralph-tui/config.toml` deletion is preserved. Let me confirm compileall's real exit code (the pipe masked it).
[94m[Bash][0m Verify compileall exit code directly $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime $ROOT/.venv/bin/python -m compileall -q packages...
compileall passes. Now the full deterministic suite (default env, so my C++ test skips). This confirms my changes don't break anything and records any pre-existing failures.
[94m[Bash][0m Run full deterministic pytest suite $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime timeout 1200 $ROOT/.venv/bin/python -m pytest -q...
11 failures, all in tracker routing / dynamic routing / manual route benchmark / toploc calibration — none touch `native_protocol`. My changes are purely additive new files, so these should be pre-existing. But I must prove it with a clean-tree reproduction. Let me move my untracked additions aside and re-run exactly those failing tests.
[94m[Bash][0m Move untracked additions aside for clean-tree repro $ ls packages/node/meshnet_node/native_protocol 2>&1

[91m[Error: Exit code 2
=== clean tree git status ===
 D .ralph-tui/config.toml
=== confirm none of my files remain ===
ls: cannot access 'packages/node/native': No such file or directory
ls: cannot access 'packages/node/meshnet_node/native_protocol': No such file or directory][0m
Clean tree confirmed (only the pre-existing `.ralph-tui/config.toml` deletion). Now run exactly the 11 failing tests on this clean tree.
[94m[Bash][0m Reproduce failing tests on clean tree $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime timeout 600 $ROOT/.venv/bin/python -m pytest -q ...
Confirmed: all 11 failures reproduce identically on a clean tree without my changes — they are pre-existing on this branch and unrelated to DGR-002. Let me restore my files.
[94m[Bash][0m Restore files and re-confirm my tests pass $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime mv /tmp/dgr002_stash/native packages/node/native...
Files restored; my tests pass (11 passed, 1 skipped). Now the evidence and completion updates. Let me check the prd.json entry format and issue status line.
[94m[Bash][0m Check prd.json and issue status format $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime python3 -c " import json d=json.load(open('.scra...
Now let me write the evidence files. First the machine-readable results.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-002/results.json[0m "{
  "task": "DGR-002",
  "title": "Adopt the versioned gRPC Shard protocol",
  "schema": {
    "proto": "packages/node/native/proto/shard_runtime.proto",
    "package": "meshnet.shard.v1",
    "syntax... (3181 chars)"
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-002/commands.txt[0m "# DGR-002 reproduction commands (run from repo root, project .venv = Python 3.14).

# 1. Generate Python stubs (reproducible; writes to gitignored build/ dir).
.venv/bin/python packages/node/native/sc... (2008 chars)"
Now the evidence README with the dependent-story handoff.
[94m[Write][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/evidence/DGR-002/README.md[0m "# DGR-002 — Versioned gRPC Shard protocol: evidence

Status: done
Date: 2026-07-15
Evidence kind: **synthetic-unit** (schema round-trip + cross-language protobuf
compatibility). No model download, no ... (10384 chars)"
Now update the issue status, prd.json passes, and progress.md.
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/.scratch/distributed-gguf-runtime/issues/02-adopt-the-versioned-grpc-shard-protocol.md[0m edit: "Status: ready-for-agent" → "Status: done"
Now set `passes: true` for DGR-002 only in the worktree prd.json.
[94m[Bash][0m Set DGR-002 passes true in prd.json $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime python3 - <<'EOF' import json, io p='.scratch/di...
Let me verify that prd.json edit only changed `passes` and didn't reformat the whole file.
[94m[Bash][0m Inspect prd.json diff $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime git diff .scratch/distributed-gguf-runtime/prd.j...
The `ensure_ascii=False` unescaped em-dashes across all stories — unwanted churn. Let me redump matching the original escaping so only the `passes` line changes.
[94m[Bash][0m Re-apply minimal prd.json passes change $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime # restore original then re-apply minimal change ...
Minimal diff now. Let me check the acceptance-criteria boxes in the issue file and append progress.md.
[94m[Bash][0m Check acceptance criteria boxes in issue $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime python3 - <<'EOF' p='.scratch/distributed-gguf-r...
Now append to progress.md, including the reusable pattern.
[94m[Read][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.ralph-tui/progress.md[0m
[94m[Edit][0m [95m/run/media/popov/d/DEV/repos/d-popov.com/AI/.ralph-tui/progress.md[0m edit: "## Codebase Patterns (Study These First)
" → "## Codebase Patterns (Study These First)

### Gene..."
[94m[Bash][0m Check end of progress.md $ tail -5 /run/media/popov/d/DEV/repos/d-popov.com/AI/.ralph-tui/progress.md
[94m[Bash][0m Append DGR-002 progress entry $ `--proto_path="${DIR}"` passes literal quotes to protoc.  --- EOF echo "appended"
Everything is in place. Let me do a final verification of git status and a clean targeted test run.
[94m[Bash][0m Final git status and targeted test verification $ cd $ROOT/.claude/worktrees/distributed-gguf-runtime echo "=== git status (short) ===" git status --s...
All gates pass and the tree is clean. Task complete.
[94m[TaskUpdate][0m
DGR-002 is complete. Here's what I delivered and verified.

## What was built
The versioned Protobuf/gRPC data-plane contract between Python and C++ Shards (ADR-0024), plus reproducible codegen/build wiring and round-trip + cross-language compatibility tests in both languages. It's purely additive — no existing runtime code was touched.

**New files:**
- `packages/node/native/proto/shard_runtime.proto` — package `meshnet.shard.v1`, proto3. Service `ShardRuntime` with `GetCapability`, `Health`, `ActivateSession` (one long-lived bidirectional stream per Activation Seam), `Release`, `Cancel`. `MessageHeader` carries every required identifier (schema version, work ID, Route Session ID, route epoch, artifact/recipe fingerprint, shard range + effective start, phase, position, idempotency step, cache expectation, compression, checksum). `TensorBundle`/`NamedTensor`/`TensorFragment` is the versioned named-tensor bundle with bounded fragments; `PrefillChunk` gives bounded chunking and `DecodeStep` the fast path; `FlowControl`, structured `Status`, and `SessionOpen.deadline_unix_nanos` cover flow control, errors, and relay-carried deadlines.
- `packages/node/meshnet_node/native_protocol/` — on-demand codegen loader + checksum/fragment helpers.
- `packages/node/native/` — `scripts/generate_python.py`, `generate_cpp.sh`, `CMakeLists.txt`, `tests/roundtrip_test.cpp`.
- `tests/test_native_shard_protocol.py` — 12 tests.

## Verification (real results)
- Targeted pytest: **11 passed, 1 skipped** in the default env (the C++ test skips cleanly when the toolchain is absent); **12 passed** with the toolchain.
- `compileall packages tests` exit 0; `git diff --check` clean.
- Full `pytest -q`: **704 passed, 14 skipped, 11 failed** — the 11 are pre-existing tracker/routing/benchmark/toploc failures unrelated to this story, which I reproduced identically on a clean tree with all DGR-002 files removed (`11 failed, 3 passed`).
- The C++ path was executed for real (a host protobuf 33.1 toolchain + `.venv` cmake): selftest `128 bytes`, ctest `1/1`, and the Python↔C++ cross-language driver passed in both directions.

## Notable findings (recorded in progress.md + evidence)
- The `.venv` installs the meshnet packages editable via a PEP 660 meta-path finder pointing at the **main** checkout, so standalone scripts must derive paths from `__file__` rather than `import meshnet_node`.
- Two real bugs I hit and fixed while testing: a non-reentrant `Lock` deadlock in the loader (now `RLock`), and protobuf 7.x's upb backend lacking `UnknownFields()` (the forward-compat test now asserts re-serialization behaviorally).
- `grpcio-tools`' bundled protoc has no C++ generator, and the default env lacks protoc/cmake/protobuf-dev — so the C++ test skips by default and DGR-004/DGR-008 should pin that toolchain. This is documented honestly as a limitation.

Evidence is at `.scratch/distributed-gguf-runtime/evidence/DGR-002/` (README, commands.txt, results.json). The issue is set to `Status: done`, `passes: true` for DGR-002 only, and the pre-existing `.ralph-tui/config.toml` deletion was preserved. No commits were created.

<promise>COMPLETE</promise>
