Haiku 5.5
Native agent · Checked operation passedChecked operation <host-path> mcp serve · local stdio MCP start + initialize + tools/list
Agent-reported scope: Started the sven MCP server over stdio with `sven mcp serve` (README 'MCP integration') and ran initialize plus tools/list; server returned 9 tools: edit_file, find_file, grep, read_file, read_lints, shell, web_fetch, web_search, write_file.
MCP server returned: rmcp · version 0.15.0.
MCP tools returned: edit_file, find_file, grep, read_file, read_lints, shell, web_fetch, web_search, write_file. Tool listing does not establish authenticated tool-call success.
Run details
- run
- swedishembedded--sven-claude-haiku-5-5-1792288588828244625
- date
- Oct 17, 2026
- time to working
- not recorded
- product hosting / execution
- Local stdio MCP server in the guest
- recorded operation scope
- product operation
- model
- claude-haiku-5-5
- agent / version
- claude-code / 2.1.300 (Claude Code)
- platform
- linux
- reported cost
- $0.007664
- Recorded source
- https://github.com/swedishembedded/sven
- Tool transport
- mcp-assigned-vm
- Test version
- readme-ced3740ceffd87e1ebe7c761c89907041f1fb793266cc8f82ec12e016b542064
- revision
- 39b3e1aec32a085c467388cdc0c9f40a2715a90c
What the agent did
Started the sven MCP server over stdio with `sven mcp serve` (README 'MCP integration') and ran initialize plus tools/list; server returned 9 tools: edit_file, find_file, grep, read_file, read_lints, shell, web_fetch, web_search, write_file.
cd <host-path> && git log -1 --format=%H 2>/dev/null; ls -la; cat README.md 2>/dev/null | head -300
echo CDP=$CDP_URL $<env-var>; which python3 node npm cargo go pip3 2>&1; cat /etc/os-release | head -2
cd <host-path> && grep -n -i "mcp" README.md | head -40; ls docs; (sed -n 1,80p docs/01-installation.md) 2>/dev/null
(which cargo || (curl -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal > /tmp/rustup.log 2>&1; echo rc=$?)); ls ~/.cargo/bin 2>/dev/null; tail -3 /tmp/rustup.log 2>/dev/null
source $HOME/.cargo/env && (sudo apt-get update -qq && sudo DEBIAN_FRONTEND=noninteractive apt-get install -y -qq build-essential pkg-config libssl-dev make > /tmp/apt.log 2>&1; echo apt=$?) && cd <host-path> && (timeout 3000 make build/release > /tmp/build.log 2>&1; echo build=$?); tail -15 /tmp/build.log
free -m | head -2; nproc; dmesg 2>/dev/null | tail -2; cd <host-path> && source $HOME/.cargo/env && (timeout 3000 make build > /tmp/build-debug.log 2>&1; echo build=$?); tail -4 /tmp/build-debug.log | cut -c1-400; ls -la target/debug/sven 2>&1
cd <host-path> && B=$PWD/target/debug/sven; printf '%s\n' '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"probe","version":"0"}}}' '{"jsonrpc":"2.0","method":"notifications/initialized"}' '{"jsonrpc":"2.0","id":2,"method":"tools/list"}' | timeout 60 $B mcp serve 2>/tmp/mcp.err | python3 -c 'import sys,json
for l in sys.stdin:
o=json.loads(l)
if o.get("id")==2: print([t["name"] for t in o["result"]["tools"]])
elif o.get("id")==1: print("init ok:", o["result"]["serverInfo"])'; echo rc=$?; head -c 300 /tmp/mcp.err
cd <host-path> && B=$PWD/target/debug/sven; printf '%s\n' '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"probe","version":"0"}}}' '{"jsonrpc":"2.0","method":"notifications/initialized"}' '{"jsonrpc":"2.0","id":2,"method":"tools/list"}' | timeout 60 $B mcp serve > /tmp/mcp.out 2>/tmp/mcp.err; echo rc=$?; cut -c1-300 /tmp/mcp.out; grep -i -E "error|warn" /tmp/mcp.err | head -5 | cut -c1-300
cd <host-path> && B=$PWD/target/debug/sven; (printf '%s\n' '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"probe","version":"0"}}}'; sleep 2; printf '%s\n' '{"jsonrpc":"2.0","method":"notifications/initialized"}'; sleep 1; printf '%s\n' '{"jsonrpc":"2.0","id":2,"method":"tools/list"}'; sleep 3) | timeout 60 $B mcp serve > /tmp/mcp.out 2>/tmp/mcp.err; echo rc=$?; python3 -c 'import json
for l in open("/tmp/mcp.out"):
o=json.loads(l)
if o.get("id")==2: print(len(o["result"]["tools"]), "tools:", [t["name"] for t in o["result"]["tools"]][:40])'; grep -ci error /tmp/mcp.err
cd <host-path> && ls -la .coldpass 2>&1; mkdir -p .coldpass && cat > .coldpass/probe.json <<'EOF'
{"kind":"mcp","argv":["<host-path>","env":{}}
EOF
cat > .coldpass/report.json <<'EOF'
{"outcome":"working","operation":"Started the sven MCP server over stdio with `sven mcp serve` (README 'MCP integration') and ran initialize plus tools/list; server returned 9 tools: edit_file, find_file, grep, read_file, read_lints, shell, web_fetch, web_search, write_file.","operation_scope":"Covers MCP server start and tool listing only. No model provider/API key was configured, so no model-backed session was run. Binary is the debug build; release build was not completed in this VM.","steps":["Read README.md (Compiling from source; MCP integration)","Installed Rust via rustup (sh.rustup.rs) from docs/01-installation.md Option 2 step 1","apt-get install build-essential pkg-config libssl-dev make (C linker needed)","make build (debug build, README: 'make build makes a debug build instead; its binary is in target/debug') -> target/debug/sven","target/debug/sven mcp serve; initialize + tools/list over stdio"],"deviations":["`make build/release` failed: cargo rustc for bin sven was SIGKILLed (signal 9, likely OOM during thin-LTO link on a 1.5 GB VM). Ran README's `make build` debug build instead, which succeeded in ~9.5 min.","Rust was not on PATH; installed via rustup per docs/01-installation.md.","No C toolchain present; installed build-essential, pkg-config, libssl-dev via apt.","Sent MCP messages with delays: sending initialize, initialized and tools/list back-to-back made the server exit before answering tools/list; paced input returned the list."],"stuck_step":null,"main_blocker":null,"suggested_fix":null}
EOF
<env-var>=<host-path> python3 -I <host-path> --validate; echo rc=$?run JSON · checker evidence · agent report + check · transcript excerpt · error excerpt