StackEngine

StackEngine is a zero-trust CLI tool that locally redacts secrets in code and configuration files before LLM exposure.

StackEngine is a zero-trust remediation engine for cloud-native operations that locally redacts secrets before they reach LLM interfaces. It executes a 5-stage pipeline combining regex prefiltering, Tree-sitter WASM structural parsing, interval harmonization, and token generation to replace sensitive values with deterministic tokens. The tool operates as a local proxy, CLI utility, pre-commit hook, or clipboard tool to handle formats like YAML, JSON, Bash, and HCL. It restores original values in inbound responses and supports OpenAI-compatible APIs, Cursor IDE, and custom redaction rules. Designed for developers and engineers, it eliminates manual credential copying while maintaining local state without writing secrets to disk.

StackEngine at a glance

Best for: Software engineer
Runs on: macOS, Windows, Linux, API, CLI, Docker
Pricing: Free
Released: October 2026
Category: AI coding tool
Website: github.com/gweisec/stackengine

Key features

Redacts secrets locally before LLM exposure
Runs a 5-stage core parsing and tokenization pipeline
Operates as a local proxy for OpenAI-compatible APIs
Scans files and intercepts git commits via pre-commit hooks
Manages an ephemeral in-memory vault with sliding TTL
Supports custom redaction rules via AST path resolution
Handles clipboard text in-place for web chat workflows

Use it for

Redacting cloud credentials before sending logs or configs to AI models
Running a local proxy to automatically tokenize AI coding assistant traffic
Blocking git commits that contain plaintext secrets
Sanitizing clipboard contents before pasting into web-based LLMs

Alternatives to StackEngine

OpenAPPA — Tracks data flows algebraically to prevent prompt injection without breaking agents.
zerostack — Minimal memory footprint and high CPU efficiency compared to JS-based agents.
shim-cli — Masks sensitive data and tracks costs for coding agents locally.
jevgrep — Reduces coding agent costs by providing targeted, relevant repository context.
SkillTotal — Scans code locally without accounts, telemetry, API tokens or executing the files.
DeepTeam — It automates penetration testing using adversarial LLM simulations.
Nullify — It fixes vulnerabilities autonomously, from detection to merged code.
Graft — Reduces tool calls by 46% and lowers latency by 60% for coding agents.
GitGuardian — Detects leaked secrets and insecure machine identities across your entire stack.
VulnClaw — It uses LLM agents to autonomously execute end-to-end security testing loops.
Entire CLI — Mirrors Git repositories globally to increase cloning speeds for AI agents.
sem — Performs entity-level diffs instead of line-based changes.

All StackEngine alternatives