# Principle Scope Fence

> Restricts execution to approved scope. Apply when working from a plan, structure, or anchored change request.

- Skill: `bostonaholic/principle-scope-fence` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bostonaholic/principle-scope-fence`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bostonaholic/principle-scope-fence/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: bostonaholic (https://skillmd.com/u/bostonaholic)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/bostonaholic/principle-scope-fence

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# Scope Fence

Treat the approved upstream artifact as the boundary: it authorizes exactly the change it names; document work outside it without performing it.

- Do not add steps, slices, or features beyond the plan; record missing work as a finding.
- Refactor adjacent code only when planned; otherwise record the opportunity.
- Keep applied fixes within approved file-and-line anchors; return expanded fixes for approval.
- Expand scope by updating the governing artifact and re-review material changes.
- Never expand or shrink silently; record expansions and omissions under `principle-skip-loudly`.