tessera@0.2.0
CAUTION· not startedPublisher claims: "Enables AI agents to claim, heartbeat, submit, split, park, and resume atomic work-queue tasks, with fencing tokens and receipts, while storing and versioning records and content-addressed files through MCP." 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: Caution 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
- no credential variables read in the code
- 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 under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.
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 77/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Tunneling service URL; Access to sensitive file paths; Tunneling service URL. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 0 s · 2 scenarios · 0 deviationsStatic findings
return subprocess.call(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.wait_for "The quick tunnel" grep -qE 'https://[a-z0-9-]+\.trycloudflare\.com' .tessera/tunnel.logFix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.out = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.out = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.subprocess.run(args, cwd=cwd, capture_output=True, timeout=60, check=False)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.allow globs that override both lists (for example ".env.example")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.PUBLIC_URL=$(grep -oE 'https://[a-z0-9-]+\.trycloudflare\.com' .tessera/tunnel.log | head -1)Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.url = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.for pgid in "${GROUPS_STARTED[@]}"; do kill -- "-$pgid" 2>/dev/null || true; doneFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.setsid bash -c "cd deploy/cloudflare && exec npx --yes $WRANGLER dev --config wrangler.jsonc \Fix: Pin versions and sources; vendor anything fetched at install time.# scripts/dev_stack.sh --tunnel also a temporary public https://*.trycloudflare.com addressFix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.Add these four lines to your agent's `AGENTS.md`:Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.server = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.return subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.out = subprocess.run(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
Vulnerability advisories (OSV) cover npm and PyPI packages; this registry has no advisory database.
What would make this Verified
3 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%- Unclaimed publisher≈ +8 on the totalClaim ta-amps: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
- Tunneling service URL≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
- Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
- Python subprocess execution detected≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
- Process kill command≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
- npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.