pi-session-mcp@0.21.0
VERIFIED· not startedPublisher claims: "Local stdio MCP server that lets Codex and Claude Code delegate work to configured Pi coding-agent sessions" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Coverage
Not started: dependency install failed; the server itself was not observed.- Tested
- the dependency install step · every file read, file written and host contacted by what ran
- Not tested
- server startup · the tool list · tool behavior
What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.
Before you give it your token
- It will ask for
PI_WRITER_NO_CREDENTIAL_REFRESHor--max-tokensConfiguration, not credentials: CLAUDE_CONFIG_DIR, PI_SESSION_MCP_CONFIG, PI_SESSION_MCP_WRITER_GUARD, PI_WRITER_LEASE_FD, XDG_RUNTIME_DIR- Where it talks to
- no vendor host named in the code
- What the honeypot saw
- no credential files read · no network
- What we could not test
- server startup · the tool list · tool behavior
Connect it with a scoped credential, under the guard. It asks for PI_WRITER_NO_CREDENTIAL_REFRESH and talks to its vendor. Give the credential to the guard, not the server: the value never enters the server's environment and only travels to the host you bind. What the tools do with a real credential was not observed.
Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-13 and scored it 82/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 13 s · 2 scenarios · 0 deviationsStatic findings
… ["ignore", "pipe", "pipe", ...(runOptions?.inheritFds ?? [])], env: runOptions?.env ? { ...(options.env ?? process.env), ...runOptions.env } : options.env, cwd: ru…Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.return { child, closed, gate, kill };Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.return failure("writer_lease_directory", "writer lease", "repair the lease directory in place (owner and chmod 700); never move or delete it or its lock files");Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.const { child, closed, gate, kill } = running;Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.return failure("event_spool_root", "event spool", `remove group and other permissions from the ${label} directory (chmod 700)`);Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.… (key, value) VALUES ('last_refresh_at', '')").run(); return input.store.db.prepare("UPDATE routing_meta SET value = ? WHERE key = 'last_refresh_at' AND value <= ?").run(input.now.toISOString(), new Date(input.now.getTime() - 86400000).toI…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.const { child, closed, gate, kill } = running;Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.if (runOptions?.env !== undefined || runOptions?.inheritFds !== undefined || released || unsafe || pending || runSignal?.aborted || !child.connected)Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.const kill = () => {Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.Cost to the agent
Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.
Known vulnerabilities
No advisories in OSV for pi-session-mcp@0.21.0 as of 28 h ago. This is the package itself, not its dependencies.