story: DGR-030 Add accelerator build presets and native CI matrix

.ralph-supervisor.log

@@ -0,0 +1,5 @@
+[2026-07-23 10:24:53] supervisor started, tailer pid=1460238
+[2026-07-23 10:24:53] cycle 1: running ralph-tui resume (log starts at line 978)
+[2026-07-23 10:25:59] ralph-tui exited without a recognized stop reason; retrying resume in 5 min
+[2026-07-23 10:33:51] supervisor started, tailer pid=1465293
+[2026-07-23 10:33:51] cycle 1: running ralph-tui run (log starts at line 1150)

.ralph-tui-run.log

@@ -976,3 +976,329 @@ reconciled DGR-069 #53 blocked
 reconciled DGR-070 #54 blocked
 reconciled DGR-071 #55 blocked
 synced=55 next=DGR-030 dry_run=False
+reconciled DGR-017 #1 completed
+reconciled DGR-018 #2 completed
+reconciled DGR-019 #3 completed
+reconciled DGR-020 #4 completed
+reconciled DGR-021 #5 completed
+reconciled DGR-022 #6 completed
+reconciled DGR-023 #7 completed
+reconciled DGR-024 #8 completed
+reconciled DGR-025 #9 completed
+reconciled DGR-026 #10 completed
+reconciled DGR-027 #11 completed
+reconciled DGR-028 #12 completed
+reconciled DGR-029 #13 completed
+reconciled DGR-030 #14 in-progress
+reconciled DGR-031 #15 ready
+reconciled DGR-032 #16 blocked
+reconciled DGR-033 #17 blocked
+reconciled DGR-034 #18 blocked
+reconciled DGR-035 #19 blocked
+reconciled DGR-036 #20 blocked
+reconciled DGR-037 #21 blocked
+reconciled DGR-038 #22 blocked
+reconciled DGR-039 #23 blocked
+reconciled DGR-040 #24 blocked
+reconciled DGR-041 #25 blocked
+reconciled DGR-042 #26 blocked
+reconciled DGR-043 #27 blocked
+reconciled DGR-044 #28 ready
+reconciled DGR-045 #29 blocked
+reconciled DGR-046 #30 blocked
+reconciled DGR-047 #31 blocked
+reconciled DGR-048 #32 blocked
+reconciled DGR-049 #33 blocked
+reconciled DGR-050 #34 blocked
+reconciled DGR-051 #35 blocked
+reconciled DGR-052 #36 blocked
+reconciled DGR-053 #37 blocked
+reconciled DGR-054 #38 blocked
+reconciled DGR-055 #39 blocked
+reconciled DGR-056 #40 blocked
+reconciled DGR-057 #41 blocked
+reconciled DGR-058 #42 blocked
+reconciled DGR-059 #43 blocked
+reconciled DGR-060 #44 blocked
+reconciled DGR-061 #45 blocked
+reconciled DGR-062 #46 blocked
+reconciled DGR-063 #47 blocked
+reconciled DGR-064 #48 blocked
+reconciled DGR-065 #49 blocked
+reconciled DGR-066 #50 blocked
+reconciled DGR-067 #51 blocked
+reconciled DGR-068 #52 blocked
+reconciled DGR-069 #53 blocked
+reconciled DGR-070 #54 blocked
+reconciled DGR-071 #55 blocked
+synced=55 next=DGR-030 dry_run=False
+
+📦 Upgrading ralph-tui configuration...
+   Installing bundled skills for detected agents...
+   Installing skills for Claude Code...
+     ✓ Skills installed for Claude Code (claude-code)
+   Installing skills for OpenCode...
+     ✓ Skills installed for OpenCode (opencode)
+   · Skipping Factory Droid (not installed)
+   · Skipping Gemini CLI (not installed)
+   Installing skills for Codex CLI...
+     ✓ Skills installed for Codex CLI (codex)
+   · Skipping Kiro CLI (not installed)
+   Installing skills for Cursor Agent...
+     ✓ Skills installed for Cursor Agent (cursor)
+   · Skipping GitHub Copilot (not installed)
+   Installing skills for Kimi CLI...
+     ✗ Failed for Kimi CLI
+   · Skipping Pi Coding Agent (not installed)
+   ✓ Installed 3 template(s) to /home/popov/.config/ralph-tui/templates
+   ✓ Updated config version
+
+✅ Upgraded to config version 2.1
+
+⚠️  Warnings:
+   • Failed to install skills for Kimi CLI: 
+DEPRECATED: 'add-skill' has been renamed to 'skills'
+
+  Please use: npx skills add <package>
+
+  Example: npx skills add vercel-labs/agent-skills
+
+Forwarding to 'npx skills add'...
+
+
+│
+●   claude-code_2-1-216_agent  Agent detected — installing non-interactively
+[?25l│
+◇  Source: https://github.com/subsy/ralph-tui.git
+[?25h[?25l│
+◒  Cloning repository…◐  Cloning repository…◓  Cloning repository…◑  Cloning repository…◒  Cloning repository…◐  Cloning repository…◓  Cloning repository…◑  Cloning repository…◒  Cloning repository….◐  Cloning repository….◓  Cloning repository….◑  Cloning repository….◒  Cloning repository….◐  Cloning repository….◓  Cloning repository….◑  Cloning repository….◒  Cloning repository…..◐  Cloning repository…..◓  Cloning repository…..◑  Cloning repository…..◒  Cloning repository…..◐  Cloning repository…..◇  Repository cloned
+[?25h[?25l│
+◇  Found 4 skills
+[?25h│
+●  Installing all 4 skills
+│
+■  Invalid agents: kimi-cli
+│
+●  Valid agents: aider-desk, amp, antigravity, antigravity-cli, astrbot, autohand-code, augment, bob, claude-code, openclaw, cline, codearts-agent, codebuddy, codemaker, codestudio, codex, command-code, continue, cortex, crush, cursor, deepagents, devin, dexto, droid, eve, firebender, forgecode, gemini-cli, github-copilot, goose, grok, hermes-agent, inference-sh, jazz, junie, iflow-cli, kilo, kimchi, kimi-code-cli, kiro-cli, kode, lingma, loaf, mcpjam, mistral-vibe, moxby, mux, opencode, openhands, ona, pi, qoder, qoder-cn, qwen-code, replit, reasonix, rovodev, roo, tabnine-cli, terramind, tinycloud, trae, trae-cn, warp, windsurf, zed, zcode, zencoder, zenflow, neovate, pochi, promptscript, adal, universal
+
+
+Initializing Ralph TUI...
+Env filter: no vars matched exclusion patterns (*_API_KEY, *_SECRET_KEY, *_SECRET)
+
+
+⚠️  Recovered stale session
+   Cleared 5 stuck in-progress task(s)
+   Session status set to "interrupted" (resumable)
+
+Resuming previous session...
+Failed to resume session
+reconciled DGR-017 #1 completed
+reconciled DGR-018 #2 completed
+reconciled DGR-019 #3 completed
+reconciled DGR-020 #4 completed
+reconciled DGR-021 #5 completed
+reconciled DGR-022 #6 completed
+reconciled DGR-023 #7 completed
+reconciled DGR-024 #8 completed
+reconciled DGR-025 #9 completed
+reconciled DGR-026 #10 completed
+reconciled DGR-027 #11 completed
+reconciled DGR-028 #12 completed
+reconciled DGR-029 #13 completed
+reconciled DGR-030 #14 ready
+reconciled DGR-031 #15 ready
+reconciled DGR-032 #16 blocked
+reconciled DGR-033 #17 blocked
+reconciled DGR-034 #18 blocked
+reconciled DGR-035 #19 blocked
+reconciled DGR-036 #20 blocked
+reconciled DGR-037 #21 blocked
+reconciled DGR-038 #22 blocked
+reconciled DGR-039 #23 blocked
+reconciled DGR-040 #24 blocked
+reconciled DGR-041 #25 blocked
+reconciled DGR-042 #26 blocked
+reconciled DGR-043 #27 blocked
+reconciled DGR-044 #28 ready
+reconciled DGR-045 #29 blocked
+reconciled DGR-046 #30 blocked
+reconciled DGR-047 #31 blocked
+reconciled DGR-048 #32 blocked
+reconciled DGR-049 #33 blocked
+reconciled DGR-050 #34 blocked
+reconciled DGR-051 #35 blocked
+reconciled DGR-052 #36 blocked
+reconciled DGR-053 #37 blocked
+reconciled DGR-054 #38 blocked
+reconciled DGR-055 #39 blocked
+reconciled DGR-056 #40 blocked
+reconciled DGR-057 #41 blocked
+reconciled DGR-058 #42 blocked
+reconciled DGR-059 #43 blocked
+reconciled DGR-060 #44 blocked
+reconciled DGR-061 #45 blocked
+reconciled DGR-062 #46 blocked
+reconciled DGR-063 #47 blocked
+reconciled DGR-064 #48 blocked
+reconciled DGR-065 #49 blocked
+reconciled DGR-066 #50 blocked
+reconciled DGR-067 #51 blocked
+reconciled DGR-068 #52 blocked
+reconciled DGR-069 #53 blocked
+reconciled DGR-070 #54 blocked
+reconciled DGR-071 #55 blocked
+synced=55 next=none dry_run=False
+reconciled DGR-017 #1 completed
+reconciled DGR-018 #2 completed
+reconciled DGR-019 #3 completed
+reconciled DGR-020 #4 completed
+reconciled DGR-021 #5 completed
+reconciled DGR-022 #6 completed
+reconciled DGR-023 #7 completed
+reconciled DGR-024 #8 completed
+reconciled DGR-025 #9 completed
+reconciled DGR-026 #10 completed
+reconciled DGR-027 #11 completed
+reconciled DGR-028 #12 completed
+reconciled DGR-029 #13 completed
+reconciled DGR-030 #14 in-progress
+reconciled DGR-031 #15 ready
+reconciled DGR-032 #16 blocked
+reconciled DGR-033 #17 blocked
+reconciled DGR-034 #18 blocked
+reconciled DGR-035 #19 blocked
+reconciled DGR-036 #20 blocked
+reconciled DGR-037 #21 blocked
+reconciled DGR-038 #22 blocked
+reconciled DGR-039 #23 blocked
+reconciled DGR-040 #24 blocked
+reconciled DGR-041 #25 blocked
+reconciled DGR-042 #26 blocked
+reconciled DGR-043 #27 blocked
+reconciled DGR-044 #28 ready
+reconciled DGR-045 #29 blocked
+reconciled DGR-046 #30 blocked
+reconciled DGR-047 #31 blocked
+reconciled DGR-048 #32 blocked
+reconciled DGR-049 #33 blocked
+reconciled DGR-050 #34 blocked
+reconciled DGR-051 #35 blocked
+reconciled DGR-052 #36 blocked
+reconciled DGR-053 #37 blocked
+reconciled DGR-054 #38 blocked
+reconciled DGR-055 #39 blocked
+reconciled DGR-056 #40 blocked
+reconciled DGR-057 #41 blocked
+reconciled DGR-058 #42 blocked
+reconciled DGR-059 #43 blocked
+reconciled DGR-060 #44 blocked
+reconciled DGR-061 #45 blocked
+reconciled DGR-062 #46 blocked
+reconciled DGR-063 #47 blocked
+reconciled DGR-064 #48 blocked
+reconciled DGR-065 #49 blocked
+reconciled DGR-066 #50 blocked
+reconciled DGR-067 #51 blocked
+reconciled DGR-068 #52 blocked
+reconciled DGR-069 #53 blocked
+reconciled DGR-070 #54 blocked
+reconciled DGR-071 #55 blocked
+synced=55 next=DGR-030 dry_run=False
+Initializing Ralph TUI...
+Env filter: no vars matched exclusion patterns (*_API_KEY, *_SECRET_KEY, *_SECRET)
+
+Session: b92af6fa-2fb6-4e92-9bf2-d571be5c8561
+Agent: claude
+Tracker: json
+PRD: .scratch/distributed-gguf-runtime/prd.json
+Max iterations: unlimited
+
+[10:34:45] [INFO] [session] Session b92af6fa-2fb6-4e92-9bf2-d571be5c8561 created. Agent: claude, Tracker: json
+[10:34:45] [INFO] [engine] Ralph started. Total tasks: 42
+[10:34:45] [INFO] [progress] Iteration 1/∞: Working on DGR-030 - Add accelerator build presets and native CI matrix
+[10:34:51] [INFO] [agent] I'll start by reading the context files for this task.
+[10:34:52] [INFO] [agent] [Bash] $ echo "--- RALPH-CONTEXT ---" && cat .scratch/distributed-gguf-runtime/RALPH-CONTEXT.md 2>/dev/null |...
+[10:34:53] [INFO] [agent] [Bash] $ echo "--- ISSUE ---" && cat .scratch/distributed-gguf-runtime/issues/030-add-accelerator-build-prese...
+[10:34:54] [INFO] [agent] [Bash] $ echo "--- PROGRESS ---" && cat .ralph-tui/progress.md 2>/dev/null | tail -300
+[10:34:58] [INFO] [agent] [Bash] $ echo "--- DGR-029 evidence ---" && cat .scratch/distributed-gguf-runtime/evidence/DGR-029/README.md ...
+[10:34:59] [INFO] [agent] [Bash] $ echo "--- find native/cmake dirs ---" && find . -iname "*CMakeLists*" -not -path "*/node_modules/*" ...
+[10:35:14] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/llama/UPSTREAM_LOCK.json
+[10:35:14] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py
+[10:35:21] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/CMakeLists.txt
+[10:35:23] [INFO] [agent] [Bash] $ find /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime -maxdept...
+[10:35:30] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime find . -ma...
+[10:35:30] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_llama_cpp_dependency.py
+[10:35:44] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime grep -rn "...
+[10:35:44] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime grep -rln ...
+[10:35:48] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime grep -n "r...
+[10:35:49] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/tracker/meshnet_tracker/capability.py
+[10:36:21] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime grep -n -B...
+[10:36:21] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime grep -n -B...
+[10:37:10] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime ls build/l...
+[10:37:25] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime ls .venv/b...
+[10:37:29] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime timeout 8 ...
+[10:37:36] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime .venv/bin/...
+[10:37:41] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime timeout 90...
+[10:37:47] [INFO] [agent] Good, cmake is available now in `.venv/bin`. Now let's check for GPU SDK availability more thoroughly and check the c++ compiler.
+[10:37:48] [INFO] [agent] [Bash] $ c++ --version 2>&1 | head -2 echo "---" which nvidia-smi rocminfo 2>&1 echo "--- CUDA_HOME / ROCM re...
+[10:37:55] [INFO] [agent] [Bash] $ which glslc glslangValidator 2>&1 echo "---" find / -maxdepth 6 -iname "vulkan.h" 2>/dev/null | grep...
+[10:39:23] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime python3 -c...
+[10:39:27] [INFO] [agent] No separate shared-gates block; they're embedded per-story. Let's check the DGR-025 evidence README for the "isolated out-of-tree" and recipe-identity conventions, briefly, then start implementing.
+[10:39:28] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime cat packag...
+[10:39:31] [INFO] [agent] Now let's implement. First, update `UPSTREAM_LOCK.json` to add the accelerator presets.
+[10:39:35] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/packages/node/native/llama/UPSTREAM_LOCK.json edit: "    "smoke_binary": "bin/llama-gguf-hash",
+[10:39:35] [INFO] [agent]     "sm..." → "    "smoke_binary": "bin/llama-gguf-hash",
+[10:39:35] [INFO] [agent]     "sm..."
+[10:39:39] [INFO] [agent] Now let's update `scripts/llama_cpp_dependency.py` with the accelerator lane primitives.
+[10:39:47] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py edit: "    if lock["expected_source"] != {"git_tree": loc..." → "    if lock["expected_source"] != {"git_tree": loc..."
+[10:39:51] [INFO] [agent] Now let's add the accelerator lane functions after `ctest_lane`:
+[10:40:07] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py edit: "def ctest_lane(build_dir: pathlib.Path) -> None:
+[10:40:07] [INFO] [agent]  ..." → "def ctest_lane(build_dir: pathlib.Path) -> None:
+[10:40:07] [INFO] [agent]  ..."
+[10:40:10] [INFO] [agent] Now add the CLI subcommands:
+[10:40:13] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py edit: "    ctest_parser = subcommands.add_parser("ctest")..." → "    ctest_parser = subcommands.add_parser("ctest")..."
+[10:40:22] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py edit: "        elif args.command == "ctest":
+[10:40:22] [INFO] [agent]             ..." → "        elif args.command == "ctest":
+[10:40:22] [INFO] [agent]             ..."
+[10:40:29] [INFO] [agent] I need to check that this doesn't break the existing test whose fixture lock has `"build": {}`. Let me guard against that.
+[10:40:30] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py
+[10:40:36] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/llama_cpp_dependency.py edit: "    presets = lock.get("accelerator_presets", {})
+[10:40:36] [INFO] [agent] ..." → "    presets = lock.get("accelerator_presets", {})
+[10:40:36] [INFO] [agent] ..."
+[10:40:40] [INFO] [agent] Now let's write the CI matrix script.
+[10:40:53] [INFO] [agent] [Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/scripts/native_accelerator_matrix.py "#!/usr/bin/env python3
+[10:40:53] [INFO] [agent] """DGR-030: native CI/build matrix over the CPU default plus accelerator lanes.
+[10:40:53] [INFO] [agent] Runs the exact deterministic CPU lane DGR-029 locked (unchanged), then probes
+[10:40:53] [INFO] [agent] each accelerator p... (4553 chars)"
+[10:40:59] [INFO] [agent] Now let's verify the Python compiles and existing tests still pass.
+[10:41:00] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime python3 -m...
+[10:41:03] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime export PAT...
+[10:41:10] [INFO] [agent] Existing tests pass. Now let's quickly test the CLI additions and the SDK-probe logic live.
+[10:41:11] [INFO] [agent] [Bash] $ do   echo "--- $lane ---"   python3 scripts/llama_cpp_dependency.py accelerator-status --name "$lane...
+[10:41:14] [INFO] [agent] Now let's run the full matrix live end-to-end to verify the CPU lane still builds correctly and accelerator lanes report skipped, then verify the reverse-cleanup contract.
+[10:41:16] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime export PAT...
+[10:43:19] [INFO] [agent] It's compiling in the background (matches DGR-029's ~2m16s wall-clock for the CPU lane). I'll wait for it.
+[10:43:20] [INFO] [agent] [Bash] $ sleep 90 && cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distr...
+[10:43:20] [INFO] [agent] [Error: <tool_use_error>Blocked: sleep 90 followed by: cat /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-gguf-runtime/972c183b-ce77-43c0-9fb1-d513602df13b/tasks/b1g4st9uy.output tail -100. 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>]
+[10:43:25] [INFO] [agent] The build moved to background automatically; I'll get notified when it finishes. Meanwhile, let's write tests for the new accelerator functionality.
+[10:43:26] [INFO] [agent] [Read] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_llama_cpp_dependency.py
+[10:44:52] [INFO] [agent] [Bash] $ tail -50 /tmp/claude-1000/-run-media-popov-d-DEV-repos-d-popov-com-AI--claude-worktrees-distributed-...
+[10:44:57] [INFO] [agent] The live matrix run succeeded: CPU lane built and CTest-passed exactly as before, and all four accelerator lanes correctly reported `skipped` with an explicit reason (no false success). Let's confirm the source checkout was properly reversed to pristine and the build dirs exist as expected.
+[10:44:58] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime git -C bui...
+[10:45:06] [INFO] [agent] Good — the checkout is pristine (matches the locked pin/tree), and only the CPU `build` dir was created (accelerator lanes never created their build dirs since they were skipped, as designed). Now let's write the unit tests.
+[10:45:26] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_llama_cpp_dependency.py edit: "    dependency._load_lock = lambda: _lock_with_reg..." → "    dependency._load_lock = lambda: _lock_with_reg..."
+[10:45:30] [INFO] [agent] Now let's create the matrix orchestration test file.
+[10:45:51] [INFO] [agent] [Write] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_accelerator_matrix.py """"Offline behavior tests for DGR-030's native CI/build matrix orchestration.
+[10:45:51] [INFO] [agent] These tests never fetch or compile llama.cpp: `llama_cpp_dependency`'s fetch/
+[10:45:51] [INFO] [agent] apply/reverse/build/smoke/ctest_lane/accele... (7187 chars)"
+[10:46:02] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_accelerator_matrix.py edit: "    assert report["failed_lanes"] == []
+[10:46:02] [INFO] [agent]     assert..." → "    assert report["failed_lanes"] == []
+[10:46:02] [INFO] [agent]     assert..."
+[10:46:17] [INFO] [agent] [Bash] $ grep -n "workspace / \"build\"" tests/test_native_accelerator_matrix.py
+[10:46:21] [INFO] [agent] [Edit] /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime/tests/test_native_accelerator_matrix.py edit: "    assert smoke_calls == [("smoke", (workspace / ..." → "    assert smoke_calls == [("smoke", (workspace.re..."
+[10:46:28] [INFO] [agent] Now let's run the full test suite.
+[10:46:29] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime export PAT...
+[10:46:42] [INFO] [agent] All 19 tests pass. Now let's run the broader shared quality gates.
+[10:46:43] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime export PAT...
+[10:46:55] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime export PAT...
+[10:47:00] [INFO] [agent] [Bash] $ cd /run/media/popov/d/DEV/repos/d-popov.com/AI/.claude/worktrees/distributed-gguf-runtime git stash ...

.ralph-tui/config.toml

@@ -0,0 +1,2 @@
+autoCommit = true
+configVersion = "2.1"

.scratch/distributed-gguf-runtime/evidence/DGR-030/README.md

@@ -0,0 +1,275 @@
+# DGR-030 evidence — accelerator build presets and native CI/build matrix
+
+**Status:** implementation complete, live-verified in this session (2026-07-23).
+**Authority:** local `prd.json` is authoritative; Gitea is a projection.
+**Upstream pin:** `e920c523e3b8a0163fe498af5bf90df35ff51d25` (`llama.cpp`, unchanged from DGR-027..029).
+
+## What existed before this session
+
+DGR-029 locked exactly one build lane — the deterministic CPU-only lane — in
+`UPSTREAM_LOCK.json`'s `build` section, plus `scripts/llama_cpp_dependency.py`'s
+`build()`/`smoke()`/`ctest_lane()`/`reproduce()`. There was no accelerator
+preset, no SDK-availability probing, and no matrix runner: only the one CPU
+lane existed, and there was no mechanism that could ever advertise a GPU
+backend as compiled or capable.
+
+## What changed in this session
+
+- `packages/node/native/llama/UPSTREAM_LOCK.json`: added a new top-level
+  `accelerator_presets` object with one entry each for `cuda` (`GGML_CUDA`),
+  `rocm` (`GGML_HIP`), `vulkan` (`GGML_VULKAN`), and `metal` (`GGML_METAL`).
+  Each entry names only the one backend flag it flips and an `sdk_probe`
+  (a binary to resolve on `PATH`, an optional env-var override, and — for
+  Metal — a `platform_only: "darwin"` gate). **The existing `build` section
+  — the deterministic CPU default DGR-029 locked — is untouched.**
+- `scripts/llama_cpp_dependency.py`:
+  - `_load_lock()` now calls a new `_verify_accelerator_presets()`, which
+    fail-closed-rejects any preset whose named backend flag is not `OFF` in
+    the CPU default's `configure_flags` — structurally guaranteeing a preset
+    can only ever *add* one backend on top of the untouched CPU baseline,
+    never redefine it.
+  - `accelerator_configure_flags(lock, name)` returns a **new** flag list —
+    the CPU default's own `configure_flags` list is never mutated — with
+    exactly the named preset's backend flag flipped `ON` and every other flag
+    (including `GGML_CPU=ON`, the fallback ops backend GPU builds still need)
+    left exactly as the CPU default declares it.
+  - `_sdk_probe(probe)` / `accelerator_status(name, lock)` resolve a lane's
+    SDK without ever raising: an absent SDK is returned as
+    `{"available": false, "reason": "<binary> is unavailable on PATH"}` (or
+    a platform-mismatch reason for Metal), so "unavailable" is data a caller
+    reports, never an exception a caller has to remember to catch.
+  - `accelerator_build(source, name, build_dir)` compiles one lane into its
+    own out-of-tree `build_dir` (an isolated directory, never DGR-029's CPU
+    `build_dir`), using the same patched-source verification and
+    `native_targets` as the CPU lane, then writes a
+    `meshnet-build-metadata.json` recording the exact `commit`/`commit_tree`,
+    per-patch SHA-256 digests, the lane's overridden `configure_flags`, the
+    resolved `cmake`/`cxx`/SDK-binary versions/paths, and explicit
+    `model_downloads: false`, `hardware_execution: false`,
+    `hardware_certified: false`, `semantic_certification: false` fields plus
+    a `note` stating the lane is registered-dark until a real-hardware
+    certification record exists. It **never** calls `smoke()`/`ctest_lane()`
+    — running a binary linked against a real accelerator backend would touch
+    real hardware, which this story deliberately keeps out of scope.
+  - Added `accelerator-status --name <lane>` and
+    `accelerator-build --name <lane> --source-dir --build-dir` CLI
+    subcommands, mirroring the existing `ctest`/`build` subcommand pattern.
+- `scripts/native_accelerator_matrix.py` (new): the native CI/build matrix.
+  `run_matrix(workspace)` fetches and applies the locked pin/patch stack once,
+  runs the unchanged CPU lane (build → smoke → ctest, exactly DGR-029's
+  contract), then for each `accelerator_presets` entry either reports
+  `{"status": "skipped", "reason": ...}` (SDK absent) or compiles it via
+  `accelerator_build` and reports `{"status": "built", ...}` — never silently
+  treating a skip as a pass. Any `DependencyError` from a lane (CPU or
+  accelerator) is caught per-lane and reported as `{"status": "failed", ...}`
+  without aborting the remaining lanes or skipping cleanup. `reverse()` always
+  runs in a `finally`, restoring the exact pristine pin/tree regardless of
+  lane outcomes. The CLI prints a JSON report and exits non-zero only if any
+  lane actually `failed` (a `skipped` lane never fails the run).
+- `tests/test_llama_cpp_dependency.py`: added 7 new tests —
+  `test_accelerator_presets_isolate_one_backend_without_touching_the_cpu_default`
+  (every preset flips exactly its own flag and the CPU default list is never
+  mutated), `test_accelerator_configure_flags_rejects_an_unknown_lane`,
+  `test_accelerator_status_reports_unavailable_sdks_without_raising` (asserts
+  the exact reason string for cuda/rocm/vulkan/metal absence),
+  `test_accelerator_status_honors_an_explicit_sdk_override`,
+  `test_accelerator_status_rejects_an_unknown_lane`,
+  `test_accelerator_build_refuses_to_compile_an_unavailable_lane` (asserts no
+  build directory is created), and a `requires_cmake`-gated
+  `test_accelerator_build_compiles_the_available_lane_with_isolated_evidence`,
+  which builds a tiny synthetic CMake project (not the full llama.cpp tree) to
+  prove `accelerator_build`'s "SDK present" path really configures with the
+  overridden flag, compiles, and writes the registered-dark metadata — in
+  about a second, without a real GPU SDK.
+- `tests/test_native_accelerator_matrix.py` (new): 3 offline tests exercising
+  `run_matrix`'s orchestration with `llama_cpp_dependency`'s
+  fetch/apply/reverse/build/smoke/ctest_lane/accelerator_status/
+  accelerator_build stubbed out — proving unavailable SDKs are reported
+  `skipped` (never a false pass), an available accelerator lane is compiled
+  without ever calling `smoke`/`ctest_lane`, and a lane failure is reported
+  per-lane without aborting sibling lanes or skipping the `reverse()` cleanup.
+
+## Toolchain note
+
+As in DGR-029, neither the ambient system Python nor `.venv-rocm` has `cmake`;
+this session's `.venv` also had no `cmake` (a prior session's install did not
+persist). This session ran `.venv/bin/python3 -m ensurepip --upgrade` (no
+`pip` was present in `.venv` either) and then
+`.venv/bin/python3 -m pip install cmake`, landing the same PyPI wheel
+(`cmake==4.4.0`) DGR-029 used, at `.venv/bin/cmake` / `.venv/bin/ctest`. All
+commands below were run with that `.venv/bin` prepended to `PATH`. No CUDA,
+ROCm, or Vulkan SDK (`nvcc`, `hipcc`, `glslc`) is installed in this
+environment, and the host platform is Linux, not `darwin` — so all four
+accelerator lanes are genuinely `skipped` in this environment's own live run
+below, which is real evidence for AC2 ("unavailable SDKs ... explicit
+unavailable/skipped lanes"), not a simulated one.
+
+## Verification — live native CI/build matrix run
+
+```text
+$ rm -rf build/llama.cpp/build build/llama.cpp/build-cuda build/llama.cpp/build-rocm build/llama.cpp/build-vulkan build/llama.cpp/build-metal
+$ python3 scripts/native_accelerator_matrix.py
+reused verified offline cache: .../build/llama.cpp/source
+usage: .../build/llama.cpp/build/bin/llama-gguf-hash [options] GGUF_IN
+...
+Test project .../build/llama.cpp/build
+    Start 27: test-meshnet-range-ownership
+1/1 Test #27: test-meshnet-range-ownership .....   Passed    0.01 sec
+100% tests passed out of 1
+{
+  "failed_lanes": [],
+  "hardware_certified": false,
+  "lanes": [
+    {
+      "build_dir": ".../build/llama.cpp/build",
+      "lane": "cpu",
+      "metadata": {
+        "cmake": "cmake version 4.4.0",
+        "commit": "e920c523e3b8a0163fe498af5bf90df35ff51d25",
+        "commit_tree": "6c91a11407a3a3fb160f5dac705f9c59718f54f1",
+        "configure_flags": [
+          "-DCMAKE_BUILD_TYPE=Release", "-DLLAMA_BUILD_TESTS=ON",
+          "-DLLAMA_BUILD_EXAMPLES=ON", "-DLLAMA_BUILD_SERVER=OFF",
+          "-DLLAMA_BUILD_TOOLS=OFF", "-DLLAMA_BUILD_APP=OFF", "-DLLAMA_CURL=OFF",
+          "-DGGML_CPU=ON", "-DGGML_BLAS=OFF", "-DGGML_CUDA=OFF",
+          "-DGGML_HIP=OFF", "-DGGML_VULKAN=OFF", "-DGGML_METAL=OFF"
+        ],
+        "cxx": "c++ (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7)",
+        "model_downloads": false,
+        "patches": { "...": "... (5 entries, unchanged sha256 digests from DGR-029)" },
+        "semantic_certification": false
+      },
+      "status": "built"
+    },
+    {"lane": "cuda", "reason": "nvcc is unavailable on PATH", "status": "skipped"},
+    {"lane": "rocm", "reason": "hipcc is unavailable on PATH", "status": "skipped"},
+    {"lane": "vulkan", "reason": "glslc is unavailable on PATH", "status": "skipped"},
+    {"lane": "metal", "reason": "platform 'linux' is not 'darwin'", "status": "skipped"}
+  ],
+  "note": "A `built` lane means it compiled with the exact recorded compiler/SDK/upstream-pin/patch-stack/build-option evidence — it never means an accelerator device was exercised. Every backend/model/recipe lane stays registered-dark until a separate real-hardware certification record exists."
+}
+$ echo $?
+0
+```
+
+Wall-clock: `real 2m19.797s` — matches DGR-029's ~2m16s CPU-lane compile; no
+accelerator lane actually compiled in this environment (all four SDKs are
+genuinely absent), so this run's added cost over DGR-029's own CPU-only
+`reproduce()` is just the four fast SDK probes.
+
+Post-run checks (source checkout left pristine by the matrix's `reverse()`):
+
+```text
+$ git -C build/llama.cpp/source status --short --branch --untracked-files=all
+## HEAD (no branch)
+$ git -C build/llama.cpp/source rev-parse HEAD HEAD^{tree}
+e920c523e3b8a0163fe498af5bf90df35ff51d25
+6c91a11407a3a3fb160f5dac705f9c59718f54f1
+$ ls build/llama.cpp/ | grep build
+build
+```
+
+Only the CPU lane's `build/` directory was created — no `build-cuda`,
+`build-rocm`, `build-vulkan`, or `build-metal` directory exists, because every
+accelerator lane was genuinely skipped rather than attempted.
+
+## Verification — targeted test suites and shared gates
+
+| Command | Result |
+| --- | --- |
+| `python3 -m pytest -q tests/test_llama_cpp_dependency.py tests/test_native_accelerator_matrix.py` | `19 passed` (9 pre-existing + 7 new accelerator-lane tests in `test_llama_cpp_dependency.py`, 3 new in `test_native_accelerator_matrix.py`; the `requires_cmake`-gated compile test ran for real, not skipped) |
+| `python3 -m compileall -q packages tests` | exit 0 |
+| `git diff --check -- packages/node/native/llama/UPSTREAM_LOCK.json scripts/llama_cpp_dependency.py tests/test_llama_cpp_dependency.py scripts/native_accelerator_matrix.py tests/test_native_accelerator_matrix.py` | exit 0 |
+| `python3 scripts/ralph_prd_schema.py validate .scratch/distributed-gguf-runtime/prd.json` | `OK: 55 stories validated.` |
+
+`git diff --check` against the full working tree separately reports one
+pre-existing trailing-whitespace line in `.ralph-tui-run.log`, which was
+already modified before this session started (see the session's initial
+`git status`) and is unrelated to this story's scope; it is excluded above by
+naming this story's own changed files explicitly.
+
+`python3 -m pytest -q tests/test_ralph_prd_schema.py` reports `55 failed, 53
+passed` in this session (all `test_render_issue_markdown_matches_committed_file`
+drift between `prd.json` and committed issue Markdown for other stories,
+e.g. `DGR-053`..`DGR-071`). `git stash`-ing this session's changes and rerunning
+reproduces `56 failed, 52 passed` identically — the same 56 failures minus the
+one this session's own `DGR-030` regeneration fixed, confirming the remaining
+55 predate this story and are out of scope to fix here. This session did
+regenerate `.scratch/distributed-gguf-runtime/issues/030-add-accelerator-
+build-presets-and-native-ci-matrix.md` via
+`python3 scripts/ralph_prd_schema.py render ... DGR-030` so DGR-030's own
+generated issue Markdown matches `prd.json` byte-for-byte (confirmed by the
+`test_render_issue_markdown_matches_committed_file[DGR-030]` case no longer
+appearing in the failure list).
+
+## Ensuring build success does not advertise capability
+
+- Every accelerator lane's `meshnet-build-metadata.json` explicitly records
+  `hardware_execution: false`, `hardware_certified: false`, and
+  `semantic_certification: false`, plus a `note` stating the lane is
+  registered-dark until a separate real-hardware certification record exists
+  — the same "artifact states this, not just prose" pattern DGR-029 used for
+  the CPU lane's `model_downloads`/`semantic_certification` fields.
+- `accelerator_build` never runs `smoke()` or `ctest_lane()`: it only
+  configures and compiles the exact `native_targets` DGR-029 already locked
+  (`llama-gguf-hash`, `test-meshnet-range-ownership`) — no binary linked
+  against a real accelerator backend is ever executed by this story's code.
+- `_verify_accelerator_presets()` structurally refuses any preset whose
+  backend flag is not `OFF` in the locked CPU default, so a preset can never
+  be defined in a way that redefines (rather than adds one backend on top of)
+  DGR-029's deterministic CPU lane.
+- The matrix's top-level report always carries `"hardware_certified": false`
+  regardless of how many lanes built, and its `note` field states this
+  explicitly for any consumer reading only the report, not the per-lane
+  metadata.
+
+## Limitations
+
+- This story proves accelerator lanes *compile* with correct, isolated
+  flags and preserves exact evidence when a lane's SDK is present. It proves
+  nothing about numerical correctness, performance, or any backend/model/
+  recipe capability on real accelerator hardware — that is explicitly
+  deferred to DGR-041 (capability registration), DGR-053 (real 2-4 stage
+  certification), and DGR-067 (capability matrix certification), all of which
+  remain unimplemented.
+- No CUDA, ROCm, or Vulkan SDK, and no macOS/Metal toolchain, is available in
+  this session's environment, so the "compile an available accelerator lane"
+  path is proven end-to-end only via the `requires_cmake`-gated synthetic-
+  project unit test and the offline matrix-orchestration tests, not via a
+  live compile of the real llama.cpp tree under `GGML_CUDA=ON` (etc.). A
+  future session with a real SDK installed will exercise
+  `accelerator_build`'s real-lane path against the genuine llama.cpp source
+  for the first time; nothing in this story's design assumes that hasn't
+  happened yet.
+- The accelerator lanes reuse the CPU lane's exact `native_targets`
+  (`llama-gguf-hash`, `test-meshnet-range-ownership`), so a passing
+  accelerator compile also proves the DGR-027/DGR-028 patch stack's
+  range-ownership code compiles under that backend flag combination — but,
+  per the point above, only structurally; it says nothing about GPU
+  execution correctness.
+- `cmake`/`ctest` remain absent system-wide in this environment; this session
+  reinstalled them into `.venv` exactly as DGR-029 did, and that install does
+  not appear to persist across sessions (this session found `.venv` without
+  `cmake` despite DGR-029's evidence recording its earlier install). A future
+  session without a `cmake`-equipped `.venv` will see the same actionable
+  "cmake is unavailable" failure DGR-029 demonstrated, not a silent pass, and
+  the new `requires_cmake`-gated tests will be skipped rather than failing.
+- `git diff --check` and `tests/test_ralph_prd_schema.py` both carry
+  pre-existing, out-of-scope failures unrelated to this story (see the gates
+  table above); this story's own changed files pass both checks cleanly.
+
+## Dependency handoff
+
+DGR-053 (real 2-4 stage certification), DGR-067 (capability matrix
+certification), and DGR-068 (packaged releases) may rely on: four isolated,
+out-of-tree accelerator build presets (`cuda`/`rocm`/`vulkan`/`metal`) in
+`UPSTREAM_LOCK.json`'s `accelerator_presets`, each toggling exactly one
+backend flag on top of DGR-029's unchanged CPU default; a native CI/build
+matrix (`scripts/native_accelerator_matrix.py`) that compiles every
+SDK-available lane with full compiler/SDK/upstream-pin/patch-stack/build-
+option evidence and reports SDK-unavailable lanes as explicit `skipped`
+lanes, never a false pass; and a compile-only contract (no lane here ever
+runs a binary against real accelerator hardware). Real-hardware execution,
+numerical correctness, performance measurement, and backend/model/recipe
+certification for any accelerator remain entirely unimplemented and must not
+be assumed from any lane's green compile.

.scratch/distributed-gguf-runtime/issues/030-add-accelerator-build-presets-and-native-ci-matrix.md

@@ -1,7 +1,7 @@
 <!-- GENERATED FROM prd.json — DO NOT EDIT AS AN INDEPENDENT SOURCE. prd.json IS AUTHORITATIVE. -->
 # DGR-030: Add accelerator build presets and native CI matrix
 
-- **Status / triage:** specification only; `ready-for-agent`; `passes: false`
+- **Status / triage:** completed; `passes: true`
 - **Execution mode:** `AFK`
 - **Milestone:** `M1`
 - **Dependencies:** `DGR-029`
@@ -18,11 +18,11 @@ Fresh Ralph session: read `.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md`,
 
 ## Acceptance criteria
 
-- [ ] Add isolated out-of-tree presets for CUDA, ROCm, Vulkan, and Metal without changing the deterministic CPU default.
+- [x] Add isolated out-of-tree presets for CUDA, ROCm, Vulkan, and Metal without changing the deterministic CPU default.
-- [ ] Add a native CI/build matrix that reports unavailable SDKs as explicit unavailable/skipped lanes rather than false success.
+- [x] Add a native CI/build matrix that reports unavailable SDKs as explicit unavailable/skipped lanes rather than false success.
-- [ ] Compile each available lane and preserve exact compiler, SDK, upstream pin, patch-stack, and build-option evidence.
+- [x] Compile each available lane and preserve exact compiler, SDK, upstream pin, patch-stack, and build-option evidence.
-- [ ] Keep every backend/model/recipe lane registered-dark until a separate real-hardware certification record exists.
+- [x] Keep every backend/model/recipe lane registered-dark until a separate real-hardware certification record exists.
-- [ ] Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff.
+- [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-030/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-030/README.md`. Legacy evidence remains provenance only and grants no implementation completion credit.

.scratch/distributed-gguf-runtime/prd.json

@@ -538,13 +538,14 @@
         "Keep every backend/model/recipe lane registered-dark until a separate real-hardware certification record exists.",
         "Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff."
       ],
-      "passes": false,
+      "passes": true,
       "notes": "Generated source issue: .scratch/distributed-gguf-runtime/issues/030-add-accelerator-build-presets-and-native-ci-matrix.md; prd.json is authoritative.",
       "blocks": [
         "DGR-053",
         "DGR-067",
         "DGR-068"
-      ]
+      ],
+      "completionNotes": "Completed by agent"
     },
     {
       "id": "DGR-031",
@@ -2161,6 +2162,6 @@
     }
   ],
   "metadata": {
-    "updatedAt": "2026-07-22T06:44:18.107Z"
+    "updatedAt": "2026-07-23T07:51:08.112Z"
   }
 }

CLAUDE.md

@@ -120,5 +120,5 @@ M1: Build system + protocol (DGR-021..033)
 
 - Ralph runs headless: reads backlog, spawns fresh Claude Code per ticket, verifies, reports
 - DGR-019/020 marked `ready-for-human` — needs review before certifying
-- Changes left uncommitted for review per Ralph policy (unless explicitly pushed)
+- As of July 23, 2026: `autoCommit = true` in `.ralph-tui/config.toml` — the engine now commits after every completed task, and a supervisor process pushes each commit to `origin/ralph/distributed-gguf-runtime` immediately.
 - `ralph-tui resume` picks up where it left off

packages/node/native/llama/UPSTREAM_LOCK.json

@@ -52,6 +52,24 @@
     "smoke_output_token": "usage",
     "ctest_regex": "^test-meshnet-range-ownership$"
   },
+  "accelerator_presets": {
+    "cuda": {
+      "backend_flag": "GGML_CUDA",
+      "sdk_probe": {"binary": "nvcc", "env_var": "CUDACXX"}
+    },
+    "rocm": {
+      "backend_flag": "GGML_HIP",
+      "sdk_probe": {"binary": "hipcc", "env_var": "HIPCXX"}
+    },
+    "vulkan": {
+      "backend_flag": "GGML_VULKAN",
+      "sdk_probe": {"binary": "glslc", "env_var": "VULKAN_SDK_GLSLC"}
+    },
+    "metal": {
+      "backend_flag": "GGML_METAL",
+      "sdk_probe": {"binary": "xcrun", "platform_only": "darwin"}
+    }
+  },
   "required_upstream_blobs": {
     "CMakeLists.txt": "81f23d7e70b7378511af5d01be680c03aebc2b15"
   },

scripts/llama_cpp_dependency.py

@@ -109,9 +109,41 @@ def _load_lock() -> dict[str, Any]:
         "workspace": "build/llama.cpp",
     }:
         raise DependencyError("retrieval must use the locked detached-commit build workspace")
+    _verify_accelerator_presets(lock)
     return lock
 
 
+def _verify_accelerator_presets(lock: dict[str, Any]) -> None:
+    """Each preset must isolate one backend that the CPU default leaves OFF.
+
+    This is what keeps DGR-030's presets from ever being able to change the
+    deterministic CPU default recorded in ``build.configure_flags``: a preset
+    can only exist for a flag this lock already pins OFF, and
+    ``accelerator_configure_flags`` only ever returns a fresh list, never
+    mutates ``build.configure_flags`` in place.
+    """
+    presets = lock.get("accelerator_presets", {})
+    if not isinstance(presets, dict):
+        raise DependencyError("accelerator_presets must be a JSON object")
+    if not presets:
+        return
+    base_flags = dict(flag[len("-D"):].split("=", 1) for flag in lock["build"]["configure_flags"])
+    for name, preset in presets.items():
+        if not isinstance(preset, dict):
+            raise DependencyError(f"accelerator_presets.{name} must be a JSON object")
+        backend_flag = preset.get("backend_flag")
+        if not isinstance(backend_flag, str) or not backend_flag:
+            raise DependencyError(f"accelerator_presets.{name} is missing backend_flag")
+        if base_flags.get(backend_flag) != "OFF":
+            raise DependencyError(
+                f"accelerator_presets.{name} backend flag {backend_flag} must be OFF in "
+                "the deterministic CPU default build.configure_flags"
+            )
+        probe = preset.get("sdk_probe")
+        if not isinstance(probe, dict) or not isinstance(probe.get("binary"), str) or not probe["binary"]:
+            raise DependencyError(f"accelerator_presets.{name} is missing an sdk_probe.binary")
+
+
 def _patches(lock: dict[str, Any]) -> list[pathlib.Path]:
     series = [line for line in (PATCH_DIR / "series").read_text().splitlines() if line]
     if series != lock["patch_series"] or series != sorted(series) or not series:
@@ -507,6 +539,116 @@ def ctest_lane(build_dir: pathlib.Path) -> None:
     print(_run(_ctest(), "--test-dir", str(build_dir), "-R", regex, "--output-on-failure"))
 
 
+def _sdk_probe(probe: dict[str, Any]) -> str | None:
+    """Resolve one accelerator lane's SDK binary, or None if it is unavailable."""
+    platform_only = probe.get("platform_only")
+    if platform_only and sys.platform != platform_only:
+        return None
+    env_var = probe.get("env_var")
+    if env_var:
+        override = os.environ.get(env_var)
+        if override:
+            return override
+    return shutil.which(probe["binary"])
+
+
+def accelerator_status(name: str, lock: dict[str, Any] | None = None) -> dict[str, Any]:
+    """Report whether lane `name`'s SDK is present, never raising for absence.
+
+    This is the single source of truth for DGR-030's "unavailable/skipped, not
+    false success" contract: absence is reported as data, not swallowed and
+    not escalated into a build attempt.
+    """
+    lock = lock if lock is not None else _load_lock()
+    presets = lock.get("accelerator_presets", {})
+    if name not in presets:
+        raise DependencyError(f"unknown accelerator lane: {name}")
+    probe = presets[name]["sdk_probe"]
+    resolved = _sdk_probe(probe)
+    if resolved is None:
+        platform_only = probe.get("platform_only")
+        if platform_only and sys.platform != platform_only:
+            reason = f"platform {sys.platform!r} is not {platform_only!r}"
+        else:
+            reason = f"{probe['binary']} is unavailable on PATH"
+        return {"lane": name, "available": False, "reason": reason}
+    return {"lane": name, "available": True, "sdk_binary": resolved}
+
+
+def accelerator_configure_flags(lock: dict[str, Any], name: str) -> list[str]:
+    """The CPU default's configure flags with exactly one backend flag flipped ON.
+
+    Returns a new list; `lock["build"]["configure_flags"]` (the deterministic
+    CPU default DGR-029 locked) is never mutated.
+    """
+    presets = lock.get("accelerator_presets", {})
+    if name not in presets:
+        raise DependencyError(f"unknown accelerator lane: {name}")
+    backend_flag = presets[name]["backend_flag"]
+    target = f"-D{backend_flag}="
+    flags: list[str] = []
+    replaced = False
+    for flag in lock["build"]["configure_flags"]:
+        if flag.startswith(target):
+            flags.append(f"-D{backend_flag}=ON")
+            replaced = True
+        else:
+            flags.append(flag)
+    if not replaced:
+        raise DependencyError(f"accelerator lane {name} backend flag {backend_flag} is not a locked base flag")
+    return flags
+
+
+def accelerator_build(source: pathlib.Path, name: str, build_dir: pathlib.Path) -> pathlib.Path:
+    """Compile lane `name` into its own out-of-tree directory. Compile-only.
+
+    This never runs `smoke`/`ctest_lane`: exercising a binary linked against an
+    accelerator backend would touch real hardware, and DGR-030 keeps every
+    backend/model/recipe lane registered-dark (compiled, never certified)
+    until a separate real-hardware certification record exists.
+    """
+    lock = _load_lock()
+    _patches(lock)
+    _verify_source(source, lock, require_clean=False)
+    _verify_patched_source(source, lock)
+    expected_marker = source / "cmake/meshnet-patch-stack.cmake"
+    if not expected_marker.is_file():
+        raise DependencyError("patch stack is not applied: Meshnet CMake marker is absent")
+    if build_dir.exists():
+        raise DependencyError(f"accelerator build directory already exists; use a clean build dir: {build_dir}")
+    status = accelerator_status(name, lock)
+    if not status["available"]:
+        raise DependencyError(f"accelerator lane {name} SDK is unavailable: {status['reason']}")
+    flags = accelerator_configure_flags(lock, name)
+    cmake = _cmake()
+    _run(cmake, "-G", lock["build"]["generator"], "-S", str(source), "-B", str(build_dir), *flags)
+    for target in lock["build"]["native_targets"]:
+        _run(cmake, "--build", str(build_dir), "--target", target, "-j2")
+    metadata = {
+        "lane": name,
+        "backend_flag": lock["accelerator_presets"][name]["backend_flag"],
+        "commit": lock["commit"],
+        "commit_tree": lock["commit_tree"],
+        "patches": {patch.name: hashlib.sha256(patch.read_bytes()).hexdigest() for patch in _patches(lock)},
+        "configure_flags": flags,
+        "cmake": _run(cmake, "--version").splitlines()[0],
+        "cxx": _run("c++", "--version").splitlines()[0],
+        "sdk_binary": status["sdk_binary"],
+        "model_downloads": False,
+        "hardware_execution": False,
+        "hardware_certified": False,
+        "semantic_certification": False,
+        "note": (
+            "compiled only; no accelerator device was exercised or driven. "
+            "Backend/model/recipe capability remains registered-dark until a "
+            "separate real-hardware certification record exists (see "
+            "DGR-041/053/067)."
+        ),
+    }
+    (build_dir / "meshnet-build-metadata.json").write_text(json.dumps(metadata, indent=2, sort_keys=True) + "\n")
+    return build_dir
+
+
 def verify(workspace: pathlib.Path) -> None:
     """Apply, verify, reverse, and leave the exact cached pin pristine."""
     source = fetch(workspace)
@@ -562,6 +704,12 @@ def main() -> int:
     smoke_parser.add_argument("--binary", type=pathlib.Path, required=True)
     ctest_parser = subcommands.add_parser("ctest")
     ctest_parser.add_argument("--build-dir", type=pathlib.Path, required=True)
+    accel_status_parser = subcommands.add_parser("accelerator-status")
+    accel_status_parser.add_argument("--name", required=True)
+    accel_build_parser = subcommands.add_parser("accelerator-build")
+    accel_build_parser.add_argument("--name", required=True)
+    accel_build_parser.add_argument("--source-dir", type=pathlib.Path, required=True)
+    accel_build_parser.add_argument("--build-dir", type=pathlib.Path, required=True)
     reproduce_parser = subcommands.add_parser("reproduce")
     reproduce_parser.add_argument("--workspace", type=pathlib.Path, default=ROOT / "build/llama.cpp")
     args = parser.parse_args()
@@ -582,6 +730,10 @@ def main() -> int:
             smoke(args.binary)
         elif args.command == "ctest":
             ctest_lane(args.build_dir)
+        elif args.command == "accelerator-status":
+            print(json.dumps(accelerator_status(args.name), indent=2, sort_keys=True))
+        elif args.command == "accelerator-build":
+            accelerator_build(args.source_dir, args.name, args.build_dir)
         else:
             reproduce(args.workspace)
     except DependencyError as error:

scripts/native_accelerator_matrix.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+"""DGR-030: native CI/build matrix over the CPU default plus accelerator lanes.
+
+Runs the exact deterministic CPU lane DGR-029 locked (unchanged), then probes
+each accelerator preset (CUDA, ROCm, Vulkan, Metal) from `UPSTREAM_LOCK.json`
+and compiles the ones whose SDK is present on this machine into their own
+out-of-tree build directory.
+
+A lane whose SDK is absent is reported as `skipped` with the exact probe
+reason, never treated as a false pass. A lane that compiles is reported as
+`built`, carrying exact compiler/SDK/upstream-pin/patch-stack/build-option
+evidence — never as a certified capability. This script never runs an
+accelerator binary and never certifies a backend/model/recipe: real-hardware
+certification is separate future work (DGR-041/053/067).
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import pathlib
+import sys
+from typing import Any
+
+ROOT = pathlib.Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "scripts"))
+import llama_cpp_dependency as dep  # noqa: E402
+
+
+def _cpu_lane(source: pathlib.Path, workspace: pathlib.Path) -> dict[str, Any]:
+    build_dir = workspace.resolve() / "build"
+    if build_dir.exists():
+        return {
+            "lane": "cpu",
+            "status": "skipped",
+            "reason": f"build directory already exists; remove for a clean rebuild: {build_dir}",
+        }
+    binary = dep.build(source, build_dir)
+    dep.smoke(binary)
+    dep.ctest_lane(build_dir)
+    metadata = json.loads((build_dir / "meshnet-build-metadata.json").read_text())
+    return {"lane": "cpu", "status": "built", "build_dir": str(build_dir), "metadata": metadata}
+
+
+def _accelerator_lane(source: pathlib.Path, workspace: pathlib.Path, name: str, lock: dict[str, Any]) -> dict[str, Any]:
+    status = dep.accelerator_status(name, lock)
+    if not status["available"]:
+        return {"lane": name, "status": "skipped", "reason": status["reason"]}
+    build_dir = workspace.resolve() / f"build-{name}"
+    if build_dir.exists():
+        return {
+            "lane": name,
+            "status": "skipped",
+            "reason": f"build directory already exists; remove for a clean rebuild: {build_dir}",
+        }
+    dep.accelerator_build(source, name, build_dir)
+    metadata = json.loads((build_dir / "meshnet-build-metadata.json").read_text())
+    return {"lane": name, "status": "built", "build_dir": str(build_dir), "metadata": metadata}
+
+
+def run_matrix(workspace: pathlib.Path) -> dict[str, Any]:
+    """Fetch/apply once, run every lane, then always reverse the checkout."""
+    source = dep.fetch(workspace)
+    dep.apply(source)
+    lanes: list[dict[str, Any]] = []
+    try:
+        lock = dep._load_lock()
+        try:
+            lanes.append(_cpu_lane(source, workspace))
+        except dep.DependencyError as error:
+            lanes.append({"lane": "cpu", "status": "failed", "reason": str(error)})
+        for name in lock.get("accelerator_presets", {}):
+            try:
+                lanes.append(_accelerator_lane(source, workspace, name, lock))
+            except dep.DependencyError as error:
+                lanes.append({"lane": name, "status": "failed", "reason": str(error)})
+    finally:
+        dep.reverse(source)
+    failed_lanes = [lane["lane"] for lane in lanes if lane["status"] == "failed"]
+    return {
+        "lanes": lanes,
+        "hardware_certified": False,
+        "note": (
+            "A `built` lane means it compiled with the exact recorded compiler/SDK/"
+            "upstream-pin/patch-stack/build-option evidence — it never means an "
+            "accelerator device was exercised. Every backend/model/recipe lane "
+            "stays registered-dark until a separate real-hardware certification "
+            "record exists."
+        ),
+        "failed_lanes": failed_lanes,
+    }
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--workspace", type=pathlib.Path, default=ROOT / "build/llama.cpp")
+    parser.add_argument("--out", type=pathlib.Path, default=None, help="also write the JSON report here")
+    args = parser.parse_args()
+    try:
+        report = run_matrix(args.workspace)
+    except dep.DependencyError as error:
+        print(f"DGR-030 dependency error: {error}", file=sys.stderr)
+        return 2
+    text = json.dumps(report, indent=2, sort_keys=True)
+    print(text)
+    if args.out:
+        args.out.write_text(text + "\n")
+    return 1 if report["failed_lanes"] else 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

tests/test_llama_cpp_dependency.py

@@ -334,3 +334,157 @@ def test_ctest_lane_raises_an_actionable_error_for_a_failing_named_test(tmp_path
         assert "meshnet-fixture-fail" in str(error)
     else:
         raise AssertionError("a failing named CTest lane must raise DependencyError")
+
+
+def test_accelerator_presets_isolate_one_backend_without_touching_the_cpu_default() -> None:
+    dependency = _load_dependency_module()
+    lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    presets = lock["accelerator_presets"]
+
+    assert set(presets) == {"cuda", "rocm", "vulkan", "metal"}
+    base_flags = list(lock["build"]["configure_flags"])
+    base_values = dict(flag[len("-D"):].split("=", 1) for flag in base_flags)
+
+    for name, preset in presets.items():
+        flags = dependency.accelerator_configure_flags(lock, name)
+
+        # The CPU default's own flag list is never mutated by building a preset.
+        assert lock["build"]["configure_flags"] == base_flags
+
+        new_values = dict(flag[len("-D"):].split("=", 1) for flag in flags)
+        backend_flag = preset["backend_flag"]
+        assert base_values[backend_flag] == "OFF"
+        assert new_values[backend_flag] == "ON"
+        for other_flag, value in base_values.items():
+            if other_flag != backend_flag:
+                assert new_values[other_flag] == value, f"{name}: {other_flag} drifted from the CPU default"
+
+
+def test_accelerator_configure_flags_rejects_an_unknown_lane() -> None:
+    dependency = _load_dependency_module()
+    lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    try:
+        dependency.accelerator_configure_flags(lock, "bogus")
+    except dependency.DependencyError as error:
+        assert "unknown accelerator lane" in str(error)
+    else:
+        raise AssertionError("an unknown accelerator lane must be refused")
+
+
+def test_accelerator_status_reports_unavailable_sdks_without_raising(monkeypatch) -> None:
+    dependency = _load_dependency_module()
+    lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    monkeypatch.setattr(dependency.shutil, "which", lambda name: None)
+
+    for name in ("cuda", "rocm", "vulkan"):
+        env_var = lock["accelerator_presets"][name]["sdk_probe"]["env_var"]
+        monkeypatch.delenv(env_var, raising=False)
+        binary = lock["accelerator_presets"][name]["sdk_probe"]["binary"]
+        assert dependency.accelerator_status(name, lock) == {
+            "lane": name,
+            "available": False,
+            "reason": f"{binary} is unavailable on PATH",
+        }
+
+    monkeypatch.setattr(dependency.sys, "platform", "linux")
+    assert dependency.accelerator_status("metal", lock) == {
+        "lane": "metal",
+        "available": False,
+        "reason": "platform 'linux' is not 'darwin'",
+    }
+
+
+def test_accelerator_status_honors_an_explicit_sdk_override(tmp_path, monkeypatch) -> None:
+    dependency = _load_dependency_module()
+    lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    fake_nvcc = tmp_path / "nvcc"
+    fake_nvcc.write_text("#!/bin/sh\nexit 0\n")
+    fake_nvcc.chmod(0o755)
+    monkeypatch.setenv("CUDACXX", str(fake_nvcc))
+
+    assert dependency.accelerator_status("cuda", lock) == {
+        "lane": "cuda",
+        "available": True,
+        "sdk_binary": str(fake_nvcc),
+    }
+
+
+def test_accelerator_status_rejects_an_unknown_lane() -> None:
+    dependency = _load_dependency_module()
+    lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    try:
+        dependency.accelerator_status("bogus", lock)
+    except dependency.DependencyError as error:
+        assert "unknown accelerator lane" in str(error)
+    else:
+        raise AssertionError("an unknown accelerator lane must be refused")
+
+
+def test_accelerator_build_refuses_to_compile_an_unavailable_lane(tmp_path, monkeypatch) -> None:
+    dependency = _load_dependency_module()
+    source = tmp_path / "source"
+    (source / "cmake").mkdir(parents=True)
+    (source / "cmake" / "meshnet-patch-stack.cmake").write_text("# marker\n")
+    monkeypatch.setattr(dependency, "_verify_source", lambda *a, **k: None)
+    monkeypatch.setattr(dependency, "_verify_patched_source", lambda *a, **k: None)
+    monkeypatch.setattr(dependency.shutil, "which", lambda name: None)
+    monkeypatch.delenv("CUDACXX", raising=False)
+
+    build_dir = tmp_path / "build-cuda"
+    try:
+        dependency.accelerator_build(source, "cuda", build_dir)
+    except dependency.DependencyError as error:
+        assert "SDK is unavailable" in str(error)
+    else:
+        raise AssertionError("accelerator_build must refuse to compile an unavailable lane")
+    assert not build_dir.exists()
+
+
+@requires_cmake
+def test_accelerator_build_compiles_the_available_lane_with_isolated_evidence(tmp_path, monkeypatch) -> None:
+    dependency = _load_dependency_module()
+
+    # A tiny synthetic project stands in for the patched llama.cpp checkout —
+    # it only needs the meshnet patch-stack marker and one target, proving
+    # accelerator_build's configure/build/evidence wiring without a multi-minute
+    # llama.cpp compile or a real GPU SDK.
+    source = tmp_path / "source"
+    (source / "cmake").mkdir(parents=True)
+    (source / "cmake" / "meshnet-patch-stack.cmake").write_text("# marker\n")
+    (source / "CMakeLists.txt").write_text(
+        "cmake_minimum_required(VERSION 3.14)\n"
+        "project(accelerator_lane_fixture NONE)\n"
+        "option(GGML_CUDA \"\" OFF)\n"
+        "if(GGML_CUDA)\n"
+        "  file(WRITE ${CMAKE_BINARY_DIR}/lane-flag-on.txt \"on\")\n"
+        "endif()\n"
+        "add_custom_target(fixture-target ALL COMMAND ${CMAKE_COMMAND} -E true)\n"
+    )
+
+    base_lock = json.loads((LLAMA_DIR / "UPSTREAM_LOCK.json").read_text())
+    fake_lock = dict(base_lock)
+    fake_lock["build"] = {
+        **base_lock["build"],
+        "generator": "Unix Makefiles",
+        "configure_flags": ["-DGGML_CUDA=OFF"],
+        "native_targets": ["fixture-target"],
+    }
+    monkeypatch.setattr(dependency, "_load_lock", lambda: fake_lock)
+    monkeypatch.setattr(dependency, "_patches", lambda lock: [])
+    monkeypatch.setattr(dependency, "_verify_source", lambda *a, **k: None)
+    monkeypatch.setattr(dependency, "_verify_patched_source", lambda *a, **k: None)
+    monkeypatch.setenv("CUDACXX", str(dependency._cmake()))
+
+    build_dir = tmp_path / "build-cuda"
+    result = dependency.accelerator_build(source, "cuda", build_dir)
+
+    assert result == build_dir
+    assert (build_dir / "lane-flag-on.txt").is_file()
+    metadata = json.loads((build_dir / "meshnet-build-metadata.json").read_text())
+    assert metadata["lane"] == "cuda"
+    assert metadata["backend_flag"] == "GGML_CUDA"
+    assert metadata["configure_flags"] == ["-DGGML_CUDA=ON"]
+    assert metadata["hardware_execution"] is False
+    assert metadata["hardware_certified"] is False
+    assert metadata["semantic_certification"] is False
+    assert "registered-dark" in metadata["note"]

tests/test_native_accelerator_matrix.py

@@ -0,0 +1,171 @@
+"""Offline behavior tests for DGR-030's native CI/build matrix orchestration.
+
+These tests never fetch or compile llama.cpp: `llama_cpp_dependency`'s fetch/
+apply/reverse/build/smoke/ctest_lane/accelerator_status/accelerator_build are
+stubbed so the matrix's own lane-reporting and cleanup contract is exercised
+in isolation. The real compile path is covered separately by
+`tests/test_llama_cpp_dependency.py`'s `accelerator_build`/CPU-lane tests and
+by a live run recorded in the DGR-030 evidence README.
+"""
+
+from __future__ import annotations
+
+import importlib.util
+import json
+import pathlib
+import sys
+
+
+ROOT = pathlib.Path(__file__).resolve().parents[1]
+MATRIX_SCRIPT = ROOT / "scripts/native_accelerator_matrix.py"
+DEP_SCRIPT = ROOT / "scripts/llama_cpp_dependency.py"
+
+
+def _load_matrix_module(monkeypatch):
+    """Load private copies of both modules with a controllable `dep`.
+
+    `native_accelerator_matrix.py` does `import llama_cpp_dependency as dep`
+    after inserting `scripts/` onto `sys.path`; pre-registering our own module
+    instance under that name in `sys.modules` (undone by monkeypatch at
+    teardown) makes the matrix module bind to the stub instead of importing a
+    fresh copy of the real dependency module.
+    """
+    dep_spec = importlib.util.spec_from_file_location("llama_cpp_dependency_matrix_dep", DEP_SCRIPT)
+    dep = importlib.util.module_from_spec(dep_spec)
+    dep_spec.loader.exec_module(dep)
+    monkeypatch.setitem(sys.modules, "llama_cpp_dependency", dep)
+
+    matrix_spec = importlib.util.spec_from_file_location("native_accelerator_matrix", MATRIX_SCRIPT)
+    matrix = importlib.util.module_from_spec(matrix_spec)
+    matrix_spec.loader.exec_module(matrix)
+    return matrix, dep
+
+
+def test_matrix_reports_unavailable_accelerator_sdks_as_skipped_not_false_success(tmp_path, monkeypatch) -> None:
+    matrix, dep = _load_matrix_module(monkeypatch)
+
+    workspace = tmp_path / "llama.cpp"
+    source = workspace / "source"
+    source.mkdir(parents=True)
+    calls: list = []
+
+    monkeypatch.setattr(dep, "fetch", lambda ws: source)
+    monkeypatch.setattr(dep, "apply", lambda src: calls.append(("apply", src)))
+    monkeypatch.setattr(dep, "reverse", lambda src: calls.append(("reverse", src)))
+    monkeypatch.setattr(
+        dep,
+        "_load_lock",
+        lambda: {"accelerator_presets": {"cuda": {}, "rocm": {}, "vulkan": {}, "metal": {}}},
+    )
+
+    def _cpu_build(src, build_dir):
+        build_dir.mkdir(parents=True)
+        (build_dir / "meshnet-build-metadata.json").write_text(json.dumps({"lane": "cpu"}))
+        return build_dir / "bin/llama-gguf-hash"
+
+    monkeypatch.setattr(dep, "build", _cpu_build)
+    monkeypatch.setattr(dep, "smoke", lambda binary: calls.append(("smoke", binary)))
+    monkeypatch.setattr(dep, "ctest_lane", lambda build_dir: calls.append(("ctest", build_dir)))
+    monkeypatch.setattr(
+        dep,
+        "accelerator_status",
+        lambda name, lock: {"lane": name, "available": False, "reason": f"{name} SDK is unavailable on PATH"},
+    )
+
+    report = matrix.run_matrix(workspace)
+
+    assert report["lanes"][0] == {
+        "lane": "cpu",
+        "status": "built",
+        "build_dir": str((workspace / "build").resolve()),
+        "metadata": {"lane": "cpu"},
+    }
+    accelerator_lanes = {lane["lane"]: lane for lane in report["lanes"][1:]}
+    assert set(accelerator_lanes) == {"cuda", "rocm", "vulkan", "metal"}
+    for name, lane in accelerator_lanes.items():
+        assert lane["status"] == "skipped"
+        assert "unavailable" in lane["reason"]
+
+    assert report["failed_lanes"] == []
+    assert report["hardware_certified"] is False
+    assert ("reverse", source) in calls  # cleanup always runs
+    # Only the CPU lane is ever smoke-tested/ctested; skipped accelerator lanes are not.
+    smoke_calls = [call for call in calls if call[0] == "smoke"]
+    ctest_calls = [call for call in calls if call[0] == "ctest"]
+    assert smoke_calls == [("smoke", (workspace.resolve() / "build" / "bin/llama-gguf-hash"))]
+    assert ctest_calls == [("ctest", (workspace.resolve() / "build"))]
+
+
+def test_matrix_compiles_an_available_accelerator_lane_without_smoke_or_ctest(tmp_path, monkeypatch) -> None:
+    matrix, dep = _load_matrix_module(monkeypatch)
+
+    workspace = tmp_path / "llama.cpp"
+    source = workspace / "source"
+    source.mkdir(parents=True)
+    calls: list = []
+
+    monkeypatch.setattr(dep, "fetch", lambda ws: source)
+    monkeypatch.setattr(dep, "apply", lambda src: None)
+    monkeypatch.setattr(dep, "reverse", lambda src: calls.append("reverse"))
+    monkeypatch.setattr(dep, "_load_lock", lambda: {"accelerator_presets": {"cuda": {}}})
+    monkeypatch.setattr(
+        matrix,
+        "_cpu_lane",
+        lambda src, ws: {"lane": "cpu", "status": "skipped", "reason": "pre-existing build dir"},
+    )
+    monkeypatch.setattr(
+        dep, "accelerator_status", lambda name, lock: {"lane": name, "available": True, "sdk_binary": "/fake/nvcc"}
+    )
+
+    def _accelerator_build(src, name, build_dir):
+        calls.append(("accelerator_build", name))
+        build_dir.mkdir(parents=True)
+        (build_dir / "meshnet-build-metadata.json").write_text(
+            json.dumps({"lane": name, "hardware_certified": False})
+        )
+        return build_dir
+
+    monkeypatch.setattr(dep, "accelerator_build", _accelerator_build)
+    monkeypatch.setattr(dep, "smoke", lambda binary: calls.append(("smoke", binary)))
+    monkeypatch.setattr(dep, "ctest_lane", lambda build_dir: calls.append(("ctest", build_dir)))
+
+    report = matrix.run_matrix(workspace)
+
+    assert report["lanes"][1]["lane"] == "cuda"
+    assert report["lanes"][1]["status"] == "built"
+    assert report["lanes"][1]["metadata"]["hardware_certified"] is False
+    assert ("accelerator_build", "cuda") in calls
+    assert not any(call[0] in ("smoke", "ctest") for call in calls if isinstance(call, tuple))
+    assert "reverse" in calls
+
+
+def test_matrix_reports_a_lane_failure_without_aborting_the_others_or_skipping_reverse(tmp_path, monkeypatch) -> None:
+    matrix, dep = _load_matrix_module(monkeypatch)
+
+    workspace = tmp_path / "llama.cpp"
+    source = workspace / "source"
+    source.mkdir(parents=True)
+    calls: list = []
+
+    monkeypatch.setattr(dep, "fetch", lambda ws: source)
+    monkeypatch.setattr(dep, "apply", lambda src: None)
+    monkeypatch.setattr(dep, "reverse", lambda src: calls.append("reverse"))
+    monkeypatch.setattr(dep, "_load_lock", lambda: {"accelerator_presets": {"cuda": {}, "vulkan": {}}})
+
+    def _cpu_lane_raises(src, ws):
+        raise dep.DependencyError("simulated cpu compile failure")
+
+    monkeypatch.setattr(matrix, "_cpu_lane", _cpu_lane_raises)
+    monkeypatch.setattr(
+        dep,
+        "accelerator_status",
+        lambda name, lock: {"lane": name, "available": False, "reason": f"{name} SDK is unavailable on PATH"},
+    )
+
+    report = matrix.run_matrix(workspace)
+
+    assert report["lanes"][0] == {"lane": "cpu", "status": "failed", "reason": "simulated cpu compile failure"}
+    assert report["failed_lanes"] == ["cpu"]
+    accelerator_statuses = {lane["lane"]: lane["status"] for lane in report["lanes"][1:]}
+    assert accelerator_statuses == {"cuda": "skipped", "vulkan": "skipped"}
+    assert "reverse" in calls