feat: add self-integrity verification for image and prompts#6
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Three verification layers: - Build-time: Dockerfile generates SHA256 manifest of security-critical files (prompts, configs, blocklists, scripts) at /opt/secy/integrity.sha256 - Container startup: entrypoint.sh verifies manifest before handing off to secy — refuses to start if any file was tampered with - Host-side: setup.sh saves image digest on install, verifies on start - Patrol: secyhealth module re-verifies manifest every 30 minutes from inside the running container Closes #4
_verify_image_digest now detects non-interactive stdin (cron, systemd restart, healthcheck) and exits immediately instead of blocking on a read prompt.
Add agent/lib/*.sh (invoke_claude, patrol scheduling, watch common, c2 correlation) and sread/lib/*.sh (blocklist enforcement, redaction, common utilities) to the SHA256 manifest. These contain security-critical logic that was previously unverified.
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Summary
Changes
Dockerfile: generates/opt/secy/integrity.sha256manifest at build timeagent/entrypoint.sh: verifies manifest on startup, exits with error if tamperedsetup.sh: saves/verifies Docker image digest on install/startsread/lib/modules/secyhealth.sh: adds integrity check section, re-runssha256sum --checkagainst manifest every patrol cycleWhat it defends against
Test plan
/opt/secy/integrity.sha256exists inside containerdocker exec ... bash -c 'echo x >> /opt/secy/AGENT.md') — should fail (read-only filesystem)./setup.sh status— verify integrity digest shown as verifieddocker compose --profile test run --rm secy-testCloses #4