{ "run_id": "avijitbhuin21--Serpentine-claude-haiku-5-5-1793144186169005665", "date": "2026-10-27T23:41:49.229270+00:00", "repo": "avijitbhuin21/Serpentine", "kind": "repo", "source": "https://github.com/avijitbhuin21/Serpentine", "commit": "fe585a98f4ef6c72578b98da4fe3e73782e0440e", "model": "claude-haiku-5-5", "model_version": "claude-haiku-5-5", "test_version": "readme-d5b140d3c0f8b95c2dd6fe6fc381a303cacb92679582c22317d8e78b572f0cf2", "pass": true, "outcome": "pass", "time_to_working_s": 291.01264359400375, "total_s": 323.0596675872803, "steps": [ "cd && ls -la && git status 2>&1 | head -3; id -u; python3 --version; cat README.md | head -150", "curl -sS -m 10 \"$CDP_URL/json/version\"; echo \" exit=$?\"; echo \"CDP_URL=$CDP_URL\"", "which cc gcc rustc cargo git uv pip3 2>&1; python3 -m pip --version 2>&1; ls | head -50; cat /etc/os-release | head -2", "python3 -m venv && install -q --upgrade pip 2>&1 | tail -3; install serpentine-lang 2>&1 | tail -5; ls | grep -i serp", "mkdir -p && cd && export PATH= && serp new myapp --git 2>&1 | tail -20; echo \"rc=$?\"; ls -la myapp 2>&1; cat myapp/main.py 2>/dev/null", "cd && export PATH= && serp run 2>&1 | tail -20; echo \"rc=$?\"; serp build main.py -o 2>&1 | tail -15; echo \"build rc=${PIPESTATUS[0]}\"; ls -la ", "mkdir -p && cd && cat > main.py <<'EOF'\nfrom serpentine import Ref\n\n\ndef mean(xs: Ref[list[float]]) -> float:\n return sum(xs) / len(xs)\n\n\ndef main() -> None:\n temps: list[float] = [21.5, 23.0, 19.25]\n print(f\"mean {mean(temps):.2f} max {max(temps):>6.1f}\")\n\n\nif __name__ == \"__main__\":\n main()\nEOF\nexport PATH=; serp check main.py 2>&1 | tail -5; echo \"check rc=$?\"; python3 main.py; serp build main.py -o 2>&1 | tail -2; ", "mkdir -p && cd && cat > main.py <<'EOF'\nfrom serpentine import Owned, Ref, Mut, move\n\n\ndef total(prices: Ref[list[float]]) -> float:\n return sum(prices)\n\n\ndef main() -> None:\n prices: Owned[list[float]] = [9.99, 4.50]\n print(total(prices))\n archive = move(prices)\n print(prices)\n\n\nif __name__ == \"__main__\":\n main()\nEOF\nexport PATH=; serp check main.py 2>&1 | tail -8; echo \"rc=${PIPESTATUS[0]}\"", "cd && cat tests/README.md | head -60; ls .github/workflows; grep -n \"run:\" .github/workflows/*.yml | head -40; grep -rln -i \"cron\\|schedul\\|webhook\\|--once\" compiler/ docs/ 2>/dev/null | head", "cd && export PATH= && timeout 900 python tools/run_accept_tests.py 2>&1 | tail -8; echo \"rc=${PIPESTATUS[0]}\"", "cd && run main.py 2>&1 | tail -3; echo \"rc=$?\"; cd && grep -n -i \"cron\\|schedul\\|webhook\\|--once\" compiler/src/serpentine_lang/prelude.rs | head -3", "cd && cat > probe.json <<'EOF'\n{\"kind\":\"cli\",\"argv\":[\"\",\"new\",\"probeapp\"],\"cwd\":\"\",\"output_directory\":\"\",\"expected_text\":\"serp: created project 'probeapp'\"}\nEOF\ncat > claims.json <<'EOF'\n[\n{\"kind\":\"claim\",\"claim\":\"serp check reports ownership errors\",\"source\":\"`serp check` gives ownership/type diagnostics; `serp lsp` serves them to your editor.\",\"input\":\"main.py that uses a list after move()\",\"expected\":\"use-after-move diagnostic and nonzero exit\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"check\",\"main.py\"],\"cwd\":\"\",\"expected_returncode\":1,\"expected_text\":\"value was moved before this use\"},\n{\"kind\":\"claim\",\"claim\":\"same observable behavior under native build and run\",\"source\":\"Any program accepted by `serp check` produces the same observable behavior when\",\"input\":\"main.py with mean() over a Ref[list[float]]\",\"expected\":\"native run prints mean line\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"run\",\"main.py\"],\"cwd\":\"\",\"expected_text\":\"mean 21.25 max 23.0\"}\n]\nEOF\ncat > examples.json <<'EOF'\n[{\"kind\":\"example\",\"claim\":\"run the accept corpus locally\",\"source\":\"tests/README.md\",\"input\":\"tests/accept programs\",\"expected\":\"all accept tests pass\",\"argv\":[\"\",\"tools/run_accept_tests.py\"],\"cwd\":\"\",\"expected_text\":\"112/112 accept tests passed\"}]\nEOF\ncat > cycles.json <<'EOF'\n{\"detected\":false,\"reason\":\"Entry points inspected (README quick start, serp CLI commands new/check/build/run, tools/*.py CI scripts). Serpentine is a one-shot compiler/runner with no cron, scheduler, loop, webhook or --once product mode; the only 'schedule' hits are asyncio task scheduling inside the runtime prelude.\",\"checks\":[]}\nEOF\n -I -c 'import json;[json.load(open(f)) for f in [\"probe.json\",\"claims.json\",\"examples.json\",\"cycles.json\"]];print(\"json ok\")'", "cd && cat > report.json <<'EOF'\n{\"outcome\":\"working\",\"fault_owner\":null,\"operation\":\"Install Serpentine (serp CLI) and compile/run/check a Python program through the native LLVM backend\",\"operation_scope\":\"Linux x86_64, Ubuntu 24.04, Python 3.12 venv with serpentine-lang 0.7.4 from PyPI, rustc and cc present; no browser needed\",\"steps\":[\"python3 -m venv && install serpentine-lang\",\"serp new myapp --git\",\"serp run (in myapp)\",\"serp build main.py -o \",\"serp check main.py (ownership example from README, expected to fail with use-after-move)\",\"serp run main.py (Ref[list[float]] mean example from README)\",\"python tools/run_accept_tests.py (tests/README.md; 112/112 passed)\"],\"deviations\":[\"Ubuntu 24.04 is externally managed, so pip was run inside a venv at instead of system-wide.\",\"Installed serpentine-lang 0.7.4 from PyPI rather than building ./shim and ./compiler from the checkout; the workspace is not a git checkout and I did not run the git fetch of pinned commit fe585a98f4ef6c72578b98da4fe3e73782e0440e, so the source snapshot was used as provided.\",\"serp build printed a warning that LLVM bitcode inlining was unavailable (LLVM 23 producer vs LLVM 22 reader) and linked the runtime as a plain library; the binary still built and matched CPython output.\",\"Accept-corpus check ran the repo's tools/run_accept_tests.py against the PyPI-installed serp, not the checkout's compiler.\"],\"stuck_step\":null,\"main_blocker\":null,\"plain_failure\":null,\"suggested_fix\":null}\nEOF\n= python3 -I --validate --replay 2>&1 | tail -40; echo \"rc=${PIPESTATUS[0]}\"", "cd && check 2>&1 | tail -3; echo \"rc1=${PIPESTATUS[0]}\"; cd && run 2>&1 | tail -2; echo \"rc2=${PIPESTATUS[0]}\"", "cd && build main.py -o 2>&1 | tail -4; echo \"rc=${PIPESTATUS[0]}\"; ls 2>&1", "cd && cat > claims.json <<'EOF'\n[\n{\"kind\":\"claim\",\"claim\":\"ownership errors are refused at compile time\",\"source\":\"Aliasing a non-Copy value without `move()` (a compile-time ownership error)\",\"input\":\"main.py that prints a list after move()\",\"expected\":\"use-after-move diagnostic and nonzero exit, no binary\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"build\",\"main.py\",\"-o\",\"\"],\"cwd\":\"\",\"expected_returncode\":1,\"expected_text\":\"value was moved before this use\"},\n{\"kind\":\"claim\",\"claim\":\"project scaffold runs under the native backend\",\"source\":\"serp run # build (LLVM, debug) + run\",\"input\":\"myapp project from serp new\",\"expected\":\"Hello from myapp!\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"run\"],\"cwd\":\"\",\"expected_text\":\"Hello from myapp!\"}\n]\nEOF\n -I -c 'import json;json.load(open(\"claims.json\"));print(\"ok\")'; cd && = python3 -I --validate --replay 2>&1 | head -c 3000; echo; echo \"rc=${PIPESTATUS[0]}\"", "cd && rm -rf && cat > probe.json <<'EOF'\n{\"kind\":\"cli\",\"argv\":[\"\",\"new\",\"probeapp2\"],\"cwd\":\"\",\"output_directory\":\"\",\"expected_text\":\"serp: created project 'probeapp2'\"}\nEOF\ncat > claims.json <<'EOF'\n[\n{\"kind\":\"claim\",\"claim\":\"ownership errors are refused at compile time\",\"source\":\"Aliasing a non-Copy value without `move()` (a compile-time ownership error)\",\"input\":\"main.py that prints a list after move()\",\"expected\":\"use-after-move diagnostic and nonzero exit, no binary\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"build\",\"main.py\"],\"cwd\":\"\",\"expected_returncode\":1,\"expected_text\":\"value was moved before this use\"},\n{\"kind\":\"claim\",\"claim\":\"project scaffold runs under the native backend\",\"source\":\"serp run # build (LLVM, debug) + run\",\"input\":\"myapp project from serp new\",\"expected\":\"Hello from myapp!\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"run\"],\"cwd\":\"\",\"expected_text\":\"Hello from myapp!\"}\n]\nEOF\ncd && = python3 -I --validate --replay 2>&1 | head -c 2500; echo; echo \"rc=${PIPESTATUS[0]}\"", "cd && new moveproj 2>&1 | tail -1 && cat > moveproj/main.py <<'EOF'\nfrom serpentine import Owned, Ref, Mut, move\n\n\ndef total(prices: Ref[list[float]]) -> float:\n return sum(prices)\n\n\ndef main() -> None:\n prices: Owned[list[float]] = [9.99, 4.50]\n print(total(prices))\n archive = move(prices)\n print(prices)\n\n\nif __name__ == \"__main__\":\n main()\nEOF\ncd moveproj && run > 2>&1; echo \"rc=$?\"; grep -c \"value was moved before this use\" ; tail -2 ", "cd && cat > claims.json <<'EOF'\n[\n{\"kind\":\"claim\",\"claim\":\"ownership errors are refused at compile time\",\"source\":\"Aliasing a non-Copy value without `move()` (a compile-time ownership error)\",\"input\":\"project main.py that prints a list after move()\",\"expected\":\"use-after-move diagnostic and nonzero exit\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"run\"],\"cwd\":\"\",\"expected_returncode\":1,\"expected_text\":\"value was moved before this use\"},\n{\"kind\":\"claim\",\"claim\":\"project scaffold runs under the native backend\",\"source\":\"serp run # build (LLVM, debug) + run\",\"input\":\"myapp project from serp new\",\"expected\":\"Hello from myapp!\",\"probe_kind\":\"cli\",\"argv\":[\"\",\"run\"],\"cwd\":\"\",\"expected_text\":\"Hello from myapp!\"}\n]\nEOF\ncd && rm -rf && = python3 -I --validate --replay 2>&1 | head -c 1500; echo; echo \"rc=${PIPESTATUS[0]}\"", "cd && cat > report.json <<'EOF'\n{\"outcome\":\"working\",\"fault_owner\":null,\"operation\":\"Install Serpentine (serp CLI) and compile/run a Python program natively, plus reject a use-after-move ownership error at compile time\",\"operation_scope\":\"Linux x86_64, Ubuntu 24.04, Python 3.12 venv with serpentine-lang 0.7.4 from PyPI; rustc and cc present; no browser needed\",\"steps\":[\"python3 -m venv && install serpentine-lang\",\"serp new myapp --git\",\"serp run (in myapp) -> Hello from myapp!\",\"serp build main.py -o (native binary)\",\"README Ref[list[float]] mean example: serp run / serp build -> mean 21.25 max 23.0 from both CPython and native binary\",\"README ownership example in a project (serp new moveproj): serp run -> use-after-move error, exit 1\",\"python tools/run_accept_tests.py (tests/README.md) -> 112/112 accept tests passed\"],\"deviations\":[\"Ubuntu 24.04 is externally managed, so pip was run inside a venv at instead of system-wide.\",\"Installed serpentine-lang 0.7.4 from PyPI rather than building ./shim and ./compiler from the checkout. The workspace is not a git checkout and I did not run the git fetch of pinned commit fe585a98f4ef6c72578b98da4fe3e73782e0440e, so the provided snapshot was used as-is.\",\"serp build printed a warning that LLVM bitcode inlining was unavailable (LLVM 23 producer vs LLVM 22 reader) and linked the runtime as a plain library; the binary still built and matched CPython output.\",\"The first validation attempts were blocked by the checker for claims that passed a .py file argument; the claim was moved to a serp project (moveproj) and run with the documented 'serp run' form. The moveproj project is hand-made setup, not a checker-generated output.\",\"The accept corpus was run with the PyPI-installed serp, not the checkout's compiler.\"],\"stuck_step\":null,\"main_blocker\":null,\"plain_failure\":null,\"suggested_fix\":null}\nEOF\nrm -rf ; -I -c 'import json;json.load(open(\"report.json\"));print(\"report ok\")'; ls " ], "stuck_step": null, "error_excerpt": null, "what_it_did": "Install Serpentine (serp CLI) and compile/run a Python program natively, plus reject a use-after-move ownership error at compile time", "suggested_fix": null, "tokens_in": 444328, "tokens_out": 18447, "cost_usd": 0.020627989999999995, "usage_complete": true, "checks": [ { "check": "operation", "status": "PASS", "details": { "working": true, "argv": [ "", "new", "probeapp2" ], "kind": "cli", "returncode": 0, "stdout": "serp: created project 'probeapp2' at \nserp: created .venv with serpentine-shim installed\nserp: get started with `serp run` (or `python main.py`) in ", "stderr": "", "needs_credentials": false, "needs_browser": false, "scope": "product operation" } } ], "safety": { "version": "z2x-1", "rules_version": "z2x-1", "summary": "No problems traced to this repository code in these checks. 2 static matches retained as context.", "expected": "Reviewed as expected for a test run: attempted writes that failed, so nothing was written.", "findings": [], "context": [ { "kind": "encoded-blob", "count": 1, "note": "Source contains encoded blob; review its purpose.", "location_count": 1, "path": "libs/serp-zipfile/tests/test_zipfile.py" } ], "limitations": [ "A short run cannot establish that code is safe.", "Connections show IP addresses; proxies can hide the final hostname.", "Tracing covers dispatched commands and their children, not the whole OS; guest root can interfere with tracing." ], "static": { "dependency_note": "OSV scanned supported lockfiles; unpinned dependencies and unsupported formats are outside this check." }, "evidence_url": "/safety/?run=avijitbhuin21--Serpentine-claude-haiku-5-5-1793144186169005665", "evidence_file": "/data/safety/avijitbhuin21--Serpentine-claude-haiku-5-5-1793144186169005665.json.gz" }, "agent_execution": "native_agent", "agent_runtime": "claude-code", "agent_runtime_version": "2.1.310 (Claude Code)", "tool_transport": "mcp-assigned-vm", "platform": "linux", "reasoning": "low", "service_tier": null, "resources": { "cpus": 2, "memory_mib": 4096, "disk_mib": 32768 }, "native_tool_calls": 20, "native_bundle": null, "architecture": null, "backend": "hyperv", "platform_details": { "backend": "hyperv", "os": "linux" }, "platform_conflicts": null, "sandbox_source": null, "source_pin": { "commit": "fe585a98f4ef6c72578b98da4fe3e73782e0440e", "url": "https://github.com/avijitbhuin21/Serpentine" }, "purpose": "initial", "profile": { "model": "claude-haiku-5-5", "reasoning": "low" }, "fault": { "owner": null, "status": "resolved", "reason": null }, "fix_id": null, "verifies_run_id": null, "hosting": null, "operation_scope": "product operation", "tool_calls": 20, "guest_setup": null, "runtime": null, "runtime_version": null, "runtime_revision": null, "source_revision": null, "evidence_version": null, "failure_origin": null, "evidence_strength": "readme_checked", "works": "yes", "install_s": null, "first_use_s": null, "mcp": "none", "needs": [], "needs_which": null, "agent_interface": [ "cli" ], "license": "MIT", "repo_url": "https://github.com/avijitbhuin21/Serpentine", "cost_to_try": "free", "hardware": null, "what_failed": null, "local_or_hosted": "local", "cycle_checks": [ { "kind": "cycle", "claim": "Scheduled or looping main behavior", "source": "repository entry points", "input": "source inspection", "expected": "identify the product trigger", "verdict": "yes", "outcome": "Entry points inspected (README quick start, serp CLI commands new/check/build/run, tools/*.py CI scripts). Serpentine is a one-shot compiler/runner with no cron, scheduler, loop, webhook or --once product mode; the only 'schedule' hits are asyncio task scheduling inside the runtime prelude.", "evidence": "Entry points inspected (README quick start, serp CLI commands new/check/build/run, tools/*.py CI scripts). Serpentine is a one-shot compiler/runner with no cron, scheduler, loop, webhook or --once product mode; the only 'schedule' hits are asyncio task scheduling inside the runtime prelude.", "command": "" } ], "claims": [ { "kind": "claim", "claim": "ownership errors are refused at compile time", "source": "Aliasing a non-Copy value without `move()` (a compile-time ownership error)", "input": "project main.py that prints a list after move()", "expected": "use-after-move diagnostic and nonzero exit", "command": " run", "verdict": "yes", "outcome": "Real input produced the expected result: value was moved before this use", "evidence": "value was moved before this use\n --> \n |\n11 | archive = move(prices)\n | ------------ 'prices' moved here\n help: re-initialize 'prices' before this point, or borrow instead of moving\n", "returncode": 1, "source_checked": true, "source_file": "README.md" }, { "kind": "claim", "claim": "project scaffold runs under the native backend", "source": "serp run # build (LLVM, debug) + run", "input": "myapp project from serp new", "expected": "Hello from myapp!", "command": " run", "verdict": "yes", "outcome": "Real input produced the expected result: Hello from myapp!", "evidence": "Hello from myapp!\n", "returncode": 0, "source_checked": true, "source_file": "README.md" } ], "claims_note": null, "example_checks": [ { "kind": "example", "claim": "run the accept corpus locally", "source": "tests/README.md", "input": "tests/accept programs", "command": " tools/run_accept_tests.py", "evidence": "tests/accept/105_finally_loop_jumps.py\nok tests/accept/106_try_assigned_locals.py\nok tests/accept/109_lambda_none.py\nok tests/accept/110_multi_comprehensions.py\nok tests/accept/111_noncopy_captures.py\nok tests/accept/112_format_specs.py\nok tests/accept/034_two_module/main.py\nok tests/accept/059_package_import/main.py\nok tests/accept/075_cross_module_inherit/main.py\nok tests/accept/077_classmethod_models/main.py\nok tests/accept/091_dup_class_names/main.py\nok tests/accept/107_class_attr_bindings/main.py\nok tests/accept/108_plain_import/main.py\n\n112/112 accept tests passed", "deferred": false, "expected": "all accept tests pass", "returncode": 0, "verdict": "yes", "outcome": "command completed successfully" } ], "does_what_it_says": "yes", "maintenance": { "last_commit_at": "2026-10-27T20:34:01Z", "commits_90d": 26, "merged_prs_90d": 0, "open_issues": 0, "open_prs": 0, "reply_share": null, "reply_threads": 0, "median_reply_hours": null, "last_release_at": "2026-10-27T19:39:33Z", "archived": false, "verdict": "maintained", "note": "actively maintained: last commit 0 days ago; 26 commits and 0 merged PRs in 90 days; 0 open issues, 0 open PRs; latest release 2026-10-27" }, "maintenance_verdict": "maintained", "maintenance_note": "actively maintained: last commit 0 days ago; 26 commits and 0 merged PRs in 90 days; 0 open issues, 0 open PRs; latest release 2026-10-27", "maintained": "active", "maintained_note": "last commit 0 days ago", "last_commit_at": "2026-10-27T20:34:03Z", "last_release_at": "2026-10-27T19:39:33Z", "open_issues": null, "answered_issues": null, "platforms_claimed": [ "linux", "mac", "windows" ], "topic": "coding", "agent_interfaces": [ { "interface": "cli", "evidence": "independent checker", "observed": true, "operation_checked": true } ], "agent_interfaces_note": "README metadata is a discovery hint, not pinned documentation proof. Observed interfaces were exercised in this run. An empty list means unknown.", "mcp_context": null, "tested_at": "2026-10-27T23:41:49.229270+00:00", "tested_commit": "fe585a98f4ef6c72578b98da4fe3e73782e0440e", "tested_with": { "agent": "claude-code", "agent_version": "2.1.310 (Claude Code)", "model": "claude-haiku-5-5", "model_route": "claude-haiku-5-5", "reasoning": "low", "os": "linux", "backend": "hyperv", "transport": "mcp-assigned-vm" }, "setup_identity": { "repo": "avijitbhuin21/Serpentine", "source": "https://github.com/avijitbhuin21/Serpentine", "commit": "fe585a98f4ef6c72578b98da4fe3e73782e0440e", "source_revision": null, "os": "linux", "architecture": null, "backend": "hyperv", "model": "claude-haiku-5-5", "model_version": "claude-haiku-5-5", "agent_execution": "native_agent", "agent_runtime": "claude-code", "agent_runtime_version": "2.1.310 (Claude Code)", "tool_transport": "mcp-assigned-vm", "runtime": null, "runtime_version": null, "runtime_revision": null, "sandbox_source": null, "guest_setup": null, "source_pin": { "commit": "fe585a98f4ef6c72578b98da4fe3e73782e0440e", "url": "https://github.com/avijitbhuin21/Serpentine" }, "platform_details": { "os": "linux", "backend": "hyperv" }, "platform_conflicts": null, "reasoning": "low", "service_tier": null, "resources": { "cpus": 2, "memory_mib": 4096, "disk_mib": 32768 }, "operation": "Install Serpentine (serp CLI) and compile/run a Python program natively, plus reject a use-after-move ownership error at compile time", "operation_scope": "product operation", "hosting": null, "kind": "repo", "test_version": "readme-d5b140d3c0f8b95c2dd6fe6fc381a303cacb92679582c22317d8e78b572f0cf2", "evidence_version": null }, "other_model": null, "other_run_id": null, "models_agree": null, "furthest_model": null, "transcript_url": "/transcripts/avijitbhuin21--Serpentine-claude-haiku-5-5-1793144186169005665.txt", "report_url": "/reports/avijitbhuin21--Serpentine-claude-haiku-5-5-1793144186169005665.json" }