szr

szr is a Go-native CLI proxy that reduces noisy terminal output before it reaches an LLM context.

It keeps the useful signal, preserves the wrapped command's exit code, and helps you spend fewer tokens on logs, diffs, and test output.

What it does

• wraps the commands you already run
• rewrites supported tools into more compact machine-friendly output when possible
• summarizes noisy output without hiding the important anchors
• records local history so you can inspect token savings over time

Install

Install the CLI with Go:

go install github.com/devr-tools/szr/cmd/szr@latest
szr self doctor

Or build from a local checkout:

make build
./bin/szr self install
szr self doctor

Homebrew install via tap:

brew install devr-tools/tap/szr
szr self doctor

Main commands

Run your normal commands through szr:

szr git status
szr git diff
szr go test ./...

AI tool support

AI bootstrap targets:

Tool	Install command	Uninstall command	Description
Codex	szr install codex	szr uninstall codex	Writes ~/.codex/szr.md (or $CODEX_HOME/szr.md) and patches the repo AGENTS.md to reference it.
Claude Code	szr install claude-code	szr uninstall claude-code	Installs ~/.claude/szr.md, a Claude hook script, and a settings.json hook registration.
Cursor	szr install cursor	szr uninstall cursor	Installs ~/.cursor/hooks.json plus a preToolUse hook script under ~/.cursor/hooks/.
Gemini	szr install gemini	szr uninstall gemini	Installs ~/.gemini/settings.json BeforeTool registration plus a hook script under ~/.gemini/hooks/.

Upcoming features

• stronger command recommendations based on real usage history and low-savings hotspots
• better repository-aware noise filtering for generated files, vendor trees, and build output
• more stable agent-facing output for long-running automated workflows
• broader reducer coverage and better fallback handling for noisy real-world commands

Command reference

Command	Description
szr git status	Run common Git commands through szr with reduced output.
szr go test ./...	Compress noisy test output while preserving failures and anchors.
szr spread	Show token savings, usage patterns, and hotspot summaries.
szr spread --history	Inspect savings history across recent commands.
szr doctor [--json]	Check runtime diagnostics and local history health.
szr self doctor [--json]	Check install state, PATH, config, cache, and version details.
szr tee --latest	Inspect the latest preserved full-output artifact.
szr explain go test ./...	Show the matched profile, budget, and rewrite decisions for a command.
szr commands	Show the full command catalog for power users and agents.
szr profiles	List built-in reducer profiles.

Update notices

• Interactive shells: szr can print update notices on stderr when update checks are enabled.
• Agent or non-interactive tool runs: inline update notices are suppressed to keep tool output stable.
• Hosts can poll szr doctor --json or szr self doctor --json and render their own user-facing notification with the returned update object.
• Opt-in auto update is available for recognized Homebrew or go install installs:

{
  "update_check": {
    "enabled": true,
    "interval_hours": 24,
    "auto_update": true
  }
}

More docs

• Contributing
• Local CI
• Releasing
• Go package
• Architecture