Impeccable explained: design guidance inside an AI coding workflow
Impeccable security: review installers, hooks and live editing
Understand which processes run with your user permissions before using the tool on a production project.
What you will learn
- Inspect the install boundary
- Constrain live mode
- Separate diagnostics from permission
Before you start
- One screen and its user task
- Authority to inspect an agent skill and project hook
Produce an evidence-backed design change that another reviewer can accept or reject.
Key takeaways
- Installers and hooks run under local permissions.
- Live editing may execute project scripts.
- Diagnostic output is not approval to change files.
Inspect the install boundary
The documented `npx` installer can copy skills and hook manifests, and a launcher can fetch an engine binary. Review package source, destination paths and any host approval prompt before use. Avoid piping an unreviewed download into a privileged shell.
A project-local hook runs in the context of that project. Its actions can touch files or invoke commands with the permissions of the developer account. Treat a changed hook definition as a code review item.
Constrain live mode
The README warns that applying live copy edits can run an optional validation script from package.json with the user’s permissions. Inspect that script in an unfamiliar checkout before enabling live editing.
Use a disposable branch and avoid production credentials while trialing an automated edit loop. Browser inspection of a public URL and local live rewriting are different operations; do not grant write access merely to run detection.
Separate diagnostics from permission
A detector finding can be useful even if a proposed edit is rejected. Keep the finding, the reason and the reviewed diff; a hook should not be a hidden policy gate.
This is a threat-model reading of documented behavior, not a security audit of the binary or every adapter. Teams with sensitive source code need their own package and network review.
Decision guide
| Criterion | Option A | Option B |
|---|---|---|
| Best when | You need predictable behavior and easy auditing | You need adaptive optimization and have reliable telemetry |
| Main risk | May leave performance on the table | Can become difficult to explain or debug |
Implementation steps
- 1
Inspect installer and hook manifests.
- 2
Review package.json validation scripts before live mode.
- 3
Trial edits in a disposable branch without secrets.
Copy-ready example
review_boundary:
installer: inspect
hook_manifest: explicit-approval
live_validation_script: inspect-before-enable
credentials: absent-from-trialFrequently asked questions
Can URL detection rewrite my repository?
The documented URL detect path inspects a rendered site; local live editing is a separate capability.
Should I approve a changed Codex hook automatically?
No. Review the new definition before accepting its trust prompt.
Sources
- Impeccable / README.mdSource checked 2026-09-29
- Impeccable / docs/CLI-CONTRACT.mdSource checked 2026-09-29
- Impeccable / docs/ENGINE.mdSource checked 2026-09-29