Skill: davida-ps/hermes-traffic-guardian (version 0.0.1-beta2)

--- name: hermes-traffic-guardian version: 0.0.1-beta2 description: Hermes runtime traffic monitoring baseline for opt-in proxy inspection, egress detection, and attestation-aware traffic posture. homepage: https://clawsec.prompt.security author: prompt-security license: AGPL-3.0-or-later hermes: emoji: "TG" requires: bins: [node, python3] --- # Hermes Traffic Guardian This is a baseline specification skill. It intentionally does not ship a proxy or runtime implementation yet. ## Release Artifact Verification For standalone installs, verify the signed release manifest before trusting `SKILL.md`, `skill.json`, or the archive. The `skill.json` file is the package metadata/SBOM source, and the release pipeline signs `checksums.json` with the ClawSec release key. ```bash set -euo pipefail SKILL_NAME="hermes-traffic-guardian" VERSION="0.0.1-beta2" REPO="prompt-security/clawsec" TAG="${SKILL_NAME}-v${VERSION}" BASE="https://github.com/${REPO}/releases/download/${TAG}" ZIP_NAME="${SKILL_NAME}-v${VERSION}.zip" TMP_DIR="$(mktemp -d)" trap 'rm -rf "$TMP_DIR"' EXIT RELEASE_PUBKEY_SHA256=[REDACTED_SECRET] curl -fsSL "$BASE/checksums.json" -o "$TMP_DIR/checksums.json" curl -fsSL "$BASE/checksums.sig" -o "$TMP_DIR/checksums.sig" curl -fsSL "$BASE/signing-public.pem" -o "$TMP_DIR/signing-public.pem" curl -fsSL "$BASE/$ZIP_NAME" -o "$TMP_DIR/$ZIP_NAME" curl -fsSL "$BASE/SKILL.md" -o "$TMP_DIR/SKILL.md" curl -fsSL "$BASE/skill.json" -o "$TMP_DIR/skill.json" ACTUAL_PUBKEY_SHA256="$(openssl pkey -pubin -in "$TMP_DIR/signing-public.pem" -outform DER | shasum -a 256 | awk '{print $1}')" if [ "$ACTUAL_PUBKEY_SHA256" != "$RELEASE_PUBKEY_SHA256" ]; then echo "ERROR: signing-public.pem fingerprint mismatch" >&2 exit 1 fi openssl base64 -d -A -in "$TMP_DIR/checksums.sig" -out "$TMP_DIR/checksums.sig.bin" openssl pkeyutl -verify -rawin -pubin \ -inkey "$TMP_DIR/signing-public.pem" \ -sigfile "$TMP_DIR/checksums.sig.bin" \ -in "$TMP_DIR/checksums.json" >/dev/null hash_file() { if command -v shasum >/dev/null 2>&1; then shasum -a 256 "$1" | awk '{print $1}' else sha256sum "$1" | awk '{print $1}' fi } verify_manifest_file() { asset="$1" path="$2" expected="$(jq -r --arg asset "$asset" '.files[$asset].sha256 // empty' "$TMP_DIR/checksums.json")" if [ -z "$expected" ]; then echo "ERROR: checksums.json missing $asset" >&2 exit 1 fi actual="$(hash_file "$path")" if [ "$actual" != "$expected" ]; then echo "ERROR: checksum mismatch for $asset" >&2 exit 1 fi } expected_archive="$(jq -r '.archive.sha256 // empty' "$TMP_DIR/checksums.json")" if [ -z "$expected_archive" ]; then echo "ERROR: checksums.json missing archive.sha256" >&2 exit 1 fi actual_archive="$(hash_file "$TMP_DIR/$ZIP_NAME")" if [ "$actual_archive" != "$expected_archive" ]; then echo "ERROR: archive checksum mismatch" >&2 exit 1 fi verify_manifest_file "SKILL.md" "$TMP_DIR/SKILL.md" verify_manifest_file "skill.json" "$TMP_DIR/skill.json" echo "Signed release manifest, archive, SKILL.md, and skill.json verified." ``` Only install or extract the archive after this verification succeeds. ## Scope Builders should use this skill as the Hermes landing zone for runtime traffic monitoring: - operator-scoped HTTP proxy inspection - optional HTTPS inspection with per-process CA trust - outbound exfiltration detection - inbound injection detection - redacted local threat logs - status export for `hermes-attestation-guardian` Do not add proxy runtime ownership to `hermes-attestation-guardian`. That skill should attest this monitor's status and configuration, not run it. ## Safety Contract - Opt-in only. - Detect-and-log by default. - No automatic system CA installation. - No global proxy environment changes. - No blocking in the first implementation. - Redact secrets before logs, summaries, or attestation-linked outputs. - Keep all state under `HERMES_TRAFFIC_GUARDIAN_HOME` or `$HERMES_HOME/security/traffic-guardian`. ## Builder Entry Points Read `SPEC.md` before implementing. Use the placeholder folders as follows: | Path | Intended use | |---|---| | `lib/` | Detector rules, redaction, posture export, report formatting | | `scripts/` | Start, stop, status, config validation, log query, attestation export helpers | | `test/` | Unit tests, proxy fixture tests, redaction tests, attestation export tests | ## Required First Implementation Behavior 1. Validate config without starting the proxy. 2. Start monitor in foreground or explicit background mode. 3. Scope proxy environment variables to the target Hermes service or CLI process. 4. Inspect HTTP request/response text up to a bounded byte limit. 5. Support optional HTTPS MITM only when the operator supplies per-process trust configuration. 6. Emit JSONL findings with redacted snippets. 7. Export a small posture JSON file that `hermes-attestation-guardian` can include as a trust anchor or watched file. ## Out of Scope for v0.0.1 Implementation - automatic system trust-store mutation - transparent network interception - default blocking - sending traffic to external services - collecting full request/response bodies


Security scan verdicts — ClawScan: clean | static analysis: clean | VirusTotal: clean | SkillSpector: clean (LOW)