# Phx Freeze

> Apply an advisory edit scope in this session. Use for read-only or directory-scoped work; no enforcement hook is installed.

- Skill: `oliver-kriska/phx-freeze-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add oliver-kriska/phx-freeze-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/oliver-kriska/phx-freeze-3/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: oliver-kriska (https://skillmd.com/u/oliver-kriska)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/oliver-kriska/phx-freeze-3

---

# Freeze — advisory edit scope

Apply a current-session instruction that limits which files this agent may edit.
This generated runtime does not install an enforcement hook, so the scope is
advisory rather than a technical lock. Never claim that edits are blocked by the
runtime.

## Usage

```text
phx-freeze
phx-freeze lib/app_web priv/repo
phx-freeze status
phx-freeze off
```

Treat the text after the skill invocation as follows:

| Invocation | Current-session behavior |
|---|---|
| No arguments | Do not edit files; investigation and reporting remain read-only. |
| Path prefixes | Edit only files under the listed project-relative prefixes. |
| `status` | Report the advisory scope currently established in this conversation. |
| `off` | Clear the advisory scope for subsequent work. |

Do not create `.claude/.freeze`. That sentinel belongs to the canonical Claude
Code plugin and could affect a later Claude Code session even though this runtime
cannot enforce or clear it reliably.

## Iron Laws

1. **Never describe this scope as enforced** — it is a binding instruction for
   the current agent, not a runtime or security boundary.
2. **Never create or modify `.claude/.freeze` in a generated runtime** — no
   matching enforcement component is installed here.
3. **Honor the active scope until the user clears it or the focused task ends** —
   ask before editing outside listed prefixes.
4. **Keep paths project-relative** — `lib/foo` includes that directory and its
   descendants, not a sibling such as `lib/foobar`.

## Native enforcement option

This skill remains advisory and never creates Claude's `.claude/.freeze`
sentinel. When the generated Amp plugin is installed, use the `phx: edit lock`
palette command for a persistent workspace lock enforced at Amp's `tool.call`
boundary. It blocks Amp-recognized edits outside the selected scope and disables
shell tools while active. Unknown third-party mutating tools remain outside
Amp's file-classification helper, so this is not complete Claude-hook parity.