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File Boundaries Skill
file-boundaries
Pattern for respecting file ownership boundaries during implementation. Prevents conflicts in parallel work.
SKILL.md
Full skill instructions
File Boundaries Skill
Pattern for respecting file ownership in parallel work.
When to Load This Skill
- You are implementing code with defined boundaries
- You're working in parallel with other agents
- You need to avoid file conflicts
Boundary Rules
Files You OWN
boundaries:
owns: [src/auth/login.ts, src/auth/logout.ts]
You CAN:
- Read these files
- Modify these files
- Create new files in these paths
- Delete these files
Files You READ
boundaries:
reads: [src/types/user.ts, src/utils/crypto.ts]
You CAN:
- Read these files for reference
- Import from these files
You CANNOT:
- Modify these files
- If you need changes → report BLOCKED
Checking Boundaries
Before modifying any file:
- Is this file in my
ownslist? - If NO → STOP, don't modify
- If need to modify → report BLOCKED with details
Reporting Boundary Violations
If you need to modify a file outside boundaries:
status: blocked
blocked_reason: boundary_violation
blocked_details:
description: "Need to modify src/types/user.ts to add new type"
needs: "Permission to modify or contract update"
suggested_resolution: "Add UserSession type to user.ts"
Parallel Work Safety
Boundaries exist to enable parallel work:
- Agent A owns
src/auth/ - Agent B owns
src/api/ - Both can work simultaneously without conflict
If boundaries are unclear or need changes:
- STOP and report BLOCKED
- Don't assume or proceed
Principles
- Strict ownership - Only touch what you own
- Explicit boundaries - No implicit permissions
- Block, don't break - Report issues, don't work around
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