Skills claude-opus-4-5-migration
📦

claude-opus-4-5-migration

Content revision r1 ⚙️ External commands

Migrate Projects to Claude Opus 4.5

Moving from older Claude models can break model names, beta headers, and prompt behavior. This skill gives Claude, Codex, and Claude Code a focused migration checklist.

Supports: Claude Codex Code(CC)
📊 74 Adequate

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "claude-opus-4-5-migration" from https://skillstore.io/skills/dennisliuck-claude-opus-4-5-migration.md and its manifest at https://skillstore.io/api/skills/dennisliuck-claude-opus-4-5-migration/manifest. Verify the artifact. The auto-install policy is unavailable. Inspect the skill and wait for explicit user consent before installing.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/dennisliuck-claude-opus-4-5-migration.md Signed manifest GET /api/skills/dennisliuck-claude-opus-4-5-migration/manifest Signed lockfile GET /api/skills/dennisliuck-claude-opus-4-5-migration/lockfile

Test it

Using "claude-opus-4-5-migration". Migrate a service from Claude Sonnet 4.5 to Claude Opus 4.5.

Expected outcome:

The assistant reports changed model names, any removed unsupported beta header, the selected effort setting, and files that were left unchanged.

Using "claude-opus-4-5-migration". A migrated prompt now calls tools too frequently.

Expected outcome:

The assistant identifies aggressive tool-triggering language and recommends softer wording while preserving the original prompt structure.

Using "claude-opus-4-5-migration". Check whether Haiku 4.5 should be migrated.

Expected outcome:

The assistant explains that Haiku models are out of scope and should not be converted by this skill.

Compare variants

3 installable variants

Each author remains a separate installable skill. The recommended variant is ranked by Skillstore evidence.

Why this variant is first

Higher Skillstore usage
anthropics Recommended

claude-opus-4-5-migration

Skillstore Score 75
Evidence Confidence High
Skillstore usage 14
Updated

2026-08-21

davila7

davila7-claude-opus-4-5-migration

Skillstore Score 75
Evidence Confidence High
Skillstore usage 6
Updated

2026-08-21

DennisLiuCk Current

dennisliuck-claude-opus-4-5-migration

Skillstore Score 74
Evidence Confidence High
Skillstore usage 7
Updated

2026-08-21

What You Can Build

Update API Integrations

Replace older Claude model identifiers across API, Bedrock, Vertex AI, or Azure integration code.

Adjust Production Prompts

Tune prompts after migration when Opus 4.5 changes tool use, exploration, or reasoning language behavior.

Review Migration Scope

Use a concise checklist to confirm model changes, unsupported beta headers, effort settings, and migration notes.

Try These Prompts

Basic Model Update 
Use this skill to migrate my project from Claude Sonnet 4.5 to Claude Opus 4.5. Update only model identifiers and summarize the changes.
API Provider Migration 
Scan the relevant files for Claude model strings across Anthropic API, Bedrock, Vertex AI, and Azure. Replace supported source models with Opus 4.5 strings.
Prompt Behavior Fix 
Review this prompt for Opus 4.5 behavior issues. Apply only the matching snippets for tool overtriggering, code exploration, or thinking terminology.
Full Migration Audit 
Perform a full Opus 4.5 migration review. Check model strings, unsupported beta headers, effort settings, prompt adjustments, exclusions, and provide a change summary.

Best Practices

  • Inspect relevant files before proposing edits or changing model identifiers.
  • Apply optional prompt snippets only when the user reports the matching issue.
  • Document every model string, beta header, and effort setting changed during migration.

Avoid

  • Do not migrate Haiku model identifiers to Opus 4.5.
  • Do not append every prompt snippet without checking the reported problem.
  • Do not remove unrelated beta headers or rewrite unrelated prompt sections.

Frequently Asked Questions

What source models does this skill migrate?
It targets Claude Sonnet 4.0, Claude Sonnet 4.5, and Claude Opus 4.1 migrations to Claude Opus 4.5.
Does it migrate Haiku models?
No. The skill explicitly says not to migrate any Claude Haiku model identifiers.
Which providers are covered?
It includes model string guidance for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry.
Does it always change prompts?
No. Prompt changes are optional and should only be applied for a specific reported Opus 4.5 behavior issue.
What beta header does it remove?
It instructs removal of the context-1m-2025-08-07 beta header because the guide says Opus 4.5 does not support it.
Can Codex use this skill?
Yes. The report marks compatibility with Claude, Codex, and Claude Code.

Developer Details

License

MIT

Skillstore revision

r1

Version notice

The author did not declare a version.

Repository

https://github.com/DennisLiuCk/claude-plugin-marketplace/tree/main/plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration

Ref

72d5025b022c77f7a51bdf5c1637c689c80e89d1

Maintenance freshness

7/18/2026

Usage

5 downloads · 308 views

File structure

📁 references/

📄 effort.md

📄 prompt-snippets.md

📄 SKILL.md

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