Constraining Claude Code Plugin Dependency Versions

TL;DR

Plugin dependency constraints keep team installs reproducible. Pin or bound versions in the plugin dependency manifest, test the full dependency graph before rollout, and document who approves upgrades when upstream plugins change hooks, skills, or MCP behavior.

Prerequisites & Requirements

• {"task": "Dependency graph mapped", "description": "Every direct and transitive plugin dependency is listed"}
• {"task": "Constraint style chosen", "description": "Exact pins or bounded semver ranges are documented"}
• {"task": "Clean install profile", "description": "You can reinstall the plugin graph from scratch for testing"}
• {"task": "Upgrade owner named", "description": "Someone approves dependency bumps and communicates breaking changes"}
• {"task": "Regression tasks defined", "description": "Representative hooks, skills, and MCP workflows are listed for testing"}

Core Concepts Explained

Dependencies compose behavior

A plugin may depend on other plugins for shared skills, MCP servers, or hooks. When a dependency updates, your plugin can inherit new tools or changed defaults without a version bump of its own.

Version constraints express policy

Exact pins maximize reproducibility. Semver ranges trade stability for easier patch uptake. Document which constraint style your team uses and when ranges are allowed.

The graph must be tested together

Validate the root plugin plus all resolved dependencies in one session. A green install of the root plugin does not guarantee compatible behavior from transitive dependencies.

Upgrades are change management

Dependency bumps belong in changelogs, release notes, and team communication when they alter permissions, MCP tools, or default output styles.

Step-by-Step Implementation Guide

1. Inventory dependencies. List every plugin and external package your plugin requires, including transitive dependencies if documented.

2. Choose constraint style. Prefer exact pins for regulated teams; use bounded semver ranges only when you have automated upgrade testing.

3. Edit the dependency manifest. Follow Claude Code plugin dependency syntax for version fields, source URLs, and optional minimum versions.

4. Install in a clean profile. Remove prior plugin versions, install from the manifest, and confirm resolved versions match expectations.

5. Run representative workflows. Exercise hooks, skills, MCP tools, and commands that depend on the graph—not just plugin installation success.

6. Record resolved versions. Commit lock-style notes or changelog entries showing the tested combination for support and rollback.

7. Define upgrade cadence. Schedule monthly or release-train reviews of dependency updates instead of accepting silent marketplace drift.

8. Communicate breaking changes. When a dependency major version changes tool behavior, publish team guidance before users auto-update.

Version Policy Examples

Troubleshooting

Installed dependency version differs from manifest

Clear cached plugin installs, verify marketplace source URL, and reinstall from the pinned manifest in a fresh Claude Code profile.

Plugin fails after upstream update

Roll back to the last known-good pinned versions and open a dependency upgrade ticket with captured tool inventories from both versions.

Semver range pulled an unexpected major

Tighten the constraint to exclude the major version until you complete a full regression pass on hooks, MCP, and skills.

CI and laptops resolve different versions

Standardize on the same marketplace endpoint and commit explicit version pins rather than open-ended ranges.

Duplicate Check

This guide complements building-a-claude-code-plugin-marketplace.mdx and plugins-in-claude-agent-sdk-deployments.mdx by focusing on dependency version constraints inside Claude Code plugin manifests, not marketplace authoring or SDK hosting.

References

• Claude Code plugin dependencies - https://code.claude.com/docs/en/plugin-dependencies
• Claude Code plugins - https://code.claude.com/docs/en/plugins
• Discover plugins - https://code.claude.com/docs/en/discover-plugins