Skills/npm/bce-engine

bce-engine@0.6.4

CAUTION· install only

Publisher claims: "bce — the blueprint conformance engine. Author an EngineeringBlueprint and gate code against it with deterministic scores, fail-closed verdicts, and re-derivable evidence. TypeScript/JavaScript AST extraction covers framework surfaces and direct module bo" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher blueprint-conformance · publishing for 102 daysInstalls 60,087Last detonated 38 h ago
What would fix thisWatchDispute verdict

Coverage

Nothing executable in the bundle ran; the trace covers the install step only.
Tested
every file read, file written and host contacted by what ran
Not tested
use of the skill by an agent

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (1 scenario; nothing executable in the bundle ran; the trace covers the install step only) on 2026-11-12 and scored it 79/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Hidden zero-width characters detected; Access to sensitive file paths; Access to sensitive file paths. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 1 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.0sprocessscript backend runs setup only
0.0sprocessscript backend runs setup only
0.0sprocessno install scripts to re-run

Static findings

HIGH
Hidden zero-width characters detecteddist/mcp-server.js:4579 · Hidden zero-width characters detected — may conceal contentconst raw = source.replace(/^/, "").split(/\r?\n/);Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
MEDIUM
npx invocation of non-well-known packagesrc/cli.ts:1220 · npx invocation of non-well-known package — may execute untrusted codeprocess.stdout.write(`next: run 'npx --no-install bce doctor --repo .' and review/commit the proposal; ratification remains attended\n`);Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagesrc/cli.ts:1184 · npx invocation of non-well-known package — may execute untrusted code… diagnosis and the final live-tree done-check; if BCE MCP is unavailable, run \`npx --no-install bce gate --repo .\`. ` + `Read the substantive verdict: advisory mode can…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
File type combined with upload actionsrc/mcp-server.ts:249 · File type combined with upload action — agent may exfiltrate local data files'sweep), honors the committed .bce-mode.json posture (advisory/enforced) and .blueprints/' +Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actiondist/mcp-server.js:9986 · File type combined with upload action — agent may exfiltrate local data files…ects the changed files (or all, on a full sweep), honors the committed .bce-mode.json posture (advisory/enforced) and .blueprints/baseline.json \u2014 no skip flags. Read…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Access to sensitive file pathssrc/proposal-io.ts:549 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesconst secretPath = /(^|\/)(?:\.env(?:\.|$)|id_rsa(?:\.|$)|id_ed25519(?:\.|$)|credentials(?:\.|$)|secrets?(?:\.|$))|\.(?:pem|key|p12|pfx)$/i;Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
File type combined with upload actionsrc/cli.ts:1005 · File type combined with upload action — agent may exfiltrate local data filesif (typeof output !== 'string' || !/^\.bce\/repair\/[a-zA-Z0-9][a-zA-Z0-9._-]*\.json$/.test(output)) {Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Access to sensitive file pathssrc/proposal-io.ts:29 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files/(^|\/)\.env(?:\.|$)/i,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagesrc/cli.ts:1181 · npx invocation of non-well-known package — may execute untrusted code…UP_NODE_ACTION} # v4\n with:\n node-version: "22"\n - run: npx --yes --package ${engine} bce gate --repo . --report-json bce-report.json\n` : …Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Access to sensitive file pathssrc/pin.ts:39 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesreturn { ...env, GIT_CONFIG_NOSYSTEM: '1', GIT_CONFIG_GLOBAL: emptyConfigFile,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈89 tok
1 file · 81 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

No advisories in OSV for bce-engine@0.6.4 as of 38 h ago. This is the package itself, not its dependencies.

What would make this Verified

1 point to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim blueprint-conformance: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
  3. 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.
  4. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
  5. File type combined with upload action≈ +2 on the totalRemove the call, or declare the host in frontmatter and explain in the README what is sent and why.
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