What are Claude Code guardrails?
Guardrails define the allowed file surface, protected systems, and verification requirements before Claude Code starts editing, so scope violations are caught early.
Claude Code guardrails
Claude Code guardrails: scope runs before they edit.
Without explicit scope, Claude Code can drift into auth, billing, env, database, and other areas outside the task. RunTrim sets guardrails before the run starts.
Claude CodeCursorCodex CLIChatGPT
01 / The problem
What goes wrong
- Claude Code interprets broad prompts broadly and may touch files outside the goal.
- Sensitive systems can be modified during unrelated Claude Code work without warning.
- Post-run diff review is difficult without pre-defined scope boundaries.
02 / Root cause
Why this happens
- Claude Code optimizes for task completion and may expand scope unless explicitly constrained.
- Natural language task descriptions do not encode file-level boundaries.
- Teams rely on implicit rules that are not machine-readable by the agent.
03 / Without RunTrim
Manual workaround
- 1Prepend a long system prompt describing files and systems to avoid before each session.
- 2Manually review every changed file after Claude Code runs.
- 3Block risky changes after the fact, once tokens are already spent.
04 / With RunTrim
RunTrim workflow
runtrim
local
$runtrim start
$runtrim agent "your task" --copy
$# paste into Claude Code
$runtrim finish
Privacy and trust
- Source code stays local. RunTrim never uploads it.
- No account required for the free CLI.
- RunTrim tracks metadata, generated prompts, changed file paths, and local memory.
- Cloud sync is optional and metadata-only.
05 / FAQ
Common questions
How do I add guardrails to Claude Code?
Run runtrim start in your repo, then runtrim agent "your task" --copy. RunTrim generates a scoped contract. Paste it into Claude Code and run runtrim finish after.
Does RunTrim block Claude Code in real time?
No. RunTrim defines scope before the run and checks changed paths after. It does not intercept Claude Code actions mid-run.
Does RunTrim upload source code to set guardrails?
No. Guardrails are defined locally from project config and task description. Source code stays on your machine.
What systems does RunTrim protect by default?
Auth, billing, env files, database, middleware, and other high-risk areas detected from your project structure.
Can RunTrim prevent every unsafe Claude Code change?
No tool can guarantee that. RunTrim makes scope explicit before the run and checks changed paths after, reducing risk at both points.
Related resources
Keep AI coding agents scoped before they edit.
Broad tasks can drift into auth, billing, env, database, middleware, and other sensitive areas. Guardrails reduce that risk.
Claude Code context limit? Continue the run without losing state.
When a run stops mid-task, the real cost is lost state. RunTrim keeps what changed, what is missing, and what to do next.
Reduce Claude Code token waste with scoped runs and local memory.
Token waste in Claude Code comes from unscoped tasks, repeated context reconstruction, and sessions that restart from scratch after a limit. RunTrim addresses all three.
AI agent scope drift: what it is and how to prevent it.
Scope drift happens when an AI coding agent edits files outside the intended task surface. It costs tokens, introduces risk, and makes post-run review harder.
Add guardrails to Claude Code runs
Define scope before Claude Code starts editing. Verify changed paths before shipping.
terminal
$npm install -g runtrim
$runtrim start
$runtrim agent "your task" --copy
Free · No account required · Local-first · Agent-agnostic