harness-checklisted

# Harness Check Skill End-to-end self-diagnostic verification engine for the Claude Code agent harness, security hooks, multi-agent symlinks, and configuration validity. ## Trigger Scenarios - Verifying harness integrity after modifying scripts, lifecycle hooks, or configuration - Validating deterministic security guardrails and pre/post tool execution filters - Checking multi-agent skill symlink synchronization across `.claude/`, `.agents/`, and `~/.gemini/` - Periodic health checks of the developer automation matrix ## Invocation ```bash ${CLAUDE_PROJECT_DIR}/scripts/harness_check.sh ``` ## Validation Matrix The harness check runs three primary validation pillars: 1. **Hook & Guardrail Unit Test Suite (`tests/test_harness.sh`)**: - Deterministic Tier 3 invariant blocking (`rm -rf /`, `rm -rf ~`) with Exit 2 - Windows host boundary isolation and read-only `/mnt/c/` path protection - Automated syntax linting gates (`bash -n`, `shellcheck`, `jq empty`, `py_compile`) - Lifecycle hook execution and error telemetry capture 2. **Multi-Agent Skill Symlink Sync (`scripts/sync_agent_skills.sh`)**: - Universal Agent standard relative symlinks (`.agents/skills/`) - Google Antigravity runtime symlinks (`~/.gemini/config/skills/`) 3. **Settings JSON Configuration Schema**: - Syntax validation of `.claude/settings.json` via `jq empty` ## Safety Classification - **Tier 2 (Controlled System Operations)**: Executes non-destructive synthetic probes and verification t