Skills claude-opus-4-5-migration
📦

claude-opus-4-5-migration

Content revision r2 Safe ⚙️ External commands

Migrate Claude Applications to Opus 4.5

Updating model identifiers and prompts across providers can be inconsistent. This skill guides targeted Opus 4.5 migrations with provider settings and prompt adjustments.

Supports: Claude Codex Code(CC)
📊 75 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/claude-opus-4-5-migration.md and its manifest at https://skillstore.io/api/skills/claude-opus-4-5-migration/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

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

Test it

Using "claude-opus-4-5-migration". Migrate an Anthropic API project from Sonnet 4.5 and review its context header.

Expected outcome:

  • Updated eligible Sonnet 4.5 references to the documented Opus 4.5 model.
  • Removed the unsupported one-million-token context beta header and added a compatibility note.
  • Listed every changed file and setting.

Using "claude-opus-4-5-migration". The migrated assistant calls tools too often.

Expected outcome:

  • Reviewed tool-triggering instructions for aggressive emphasis.
  • Softened only the relevant mandatory wording while preserving other prompt requirements.
  • Explained each prompt adjustment.

Using "claude-opus-4-5-migration". Prepare a Bedrock migration and include effort guidance.

Expected outcome:

  • Selected the documented Bedrock target identifier for Opus 4.5.
  • Reviewed high-effort configuration and its required beta flag.
  • Flagged provider support for verification before deployment.

Security Audit

Safe
v10 • 7/23/2026 Open versioned report

All 30 static findings are false positives. The six blocker matches are ordinary coding and design guidance, while the 24 command matches are Markdown delimiters, identifiers, or reference links with no execution behavior. No prompt injection or other semantic security risk was found.

3
Files scanned
284
Lines analyzed
0
Review items
0
False positives ignored

Risk Factors

⚙️ External commands (24)
SKILL.md:15 SKILL.md:25 SKILL.md:27-29 SKILL.md:29-35 SKILL.md:35-36 SKILL.md:36-37 SKILL.md:37-38 SKILL.md:38-44 SKILL.md:44 SKILL.md:45 SKILL.md:46 SKILL.md:48-55 SKILL.md:55 SKILL.md:67-68 SKILL.md:68 SKILL.md:69 SKILL.md:70 SKILL.md:71-79 SKILL.md:79-85 SKILL.md:85-91 SKILL.md:91-95 SKILL.md:95-97 SKILL.md:97-103 SKILL.md:103-105
No confirmed security findings were detected by the latest completed static and semantic audit. This does not prove the skill has no side effects.
Audited by: codex View Audit History →
Share & cite this report

Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.

Open versioned report
Security Assessment

Copy report link

https://skillstore.io/skills/claude-opus-4-5-migration/audits/10?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report

Markdown badge

[![Skillstore security assessment](https://skillstore.io/badges/skills/claude-opus-4-5-migration/security.svg)](https://skillstore.io/skills/claude-opus-4-5-migration?utm_source=security_passport_badge)

HTML badge

<a href="https://skillstore.io/skills/claude-opus-4-5-migration?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/claude-opus-4-5-migration/security.svg" alt="Skillstore security assessment" loading="lazy"></a>

Embed card

<iframe src="https://skillstore.io/embed/skills/claude-opus-4-5-migration.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>
Academic citations (APA · BibTeX · CFF)

APA citation

anthropics. (2026). claude-opus-4-5-migration security audit report (audit version 10) [Author version unspecified]. Skillstore. https://skillstore.io/skills/claude-opus-4-5-migration/audits/10

BibTeX citation

@techreport{anthropics-claude-opus-4-5-migration-2026, author = {anthropics}, title = {claude-opus-4-5-migration security audit report (audit version 10)}, institution = {Skillstore}, year = {2026}, number = {10}, url = {https://skillstore.io/skills/claude-opus-4-5-migration/audits/10}, note = {Author version unspecified} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "claude-opus-4-5-migration security audit report (audit version 10)" version: "unspecified" type: report authors: - name: "anthropics" date-released: "2026-07-23" url: "https://skillstore.io/skills/claude-opus-4-5-migration/audits/10" identifiers: - type: other value: "skillstore:claude-opus-4-5-migration:audit:10" description: "Skillstore immutable audit report identifier"

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 Current

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

dennisliuck-claude-opus-4-5-migration

Skillstore Score 74
Evidence Confidence High
Skillstore usage 7
Updated

2026-08-21

Skillstore Score

Why this score Evidence Confidence: High
41
Architecture
85
Maintainability
87
Content
71
Community
91
Spec Compliance

What You Can Build

Upgrade an Anthropic Application

Update eligible model calls, remove an incompatible context header, and review effort settings in an existing application.

Update Managed Cloud Models

Apply the documented Opus 4.5 identifier for Bedrock, Vertex AI, or Azure AI Foundry.

Tune Migrated Prompts

Address specific Opus 4.5 behavior changes while preserving the existing prompt structure and functional content.

Try These Prompts

Basic Model Upgrade 
Migrate [project path] from [supported source model] to Opus 4.5. Update only model identifiers and summarize the changed files.
Provider-Specific Migration 
Migrate [project path] to Opus 4.5 on [provider]. Review model identifiers, unsupported headers, and effort configuration, then summarize each change.
Prompt Behavior Adjustment 
Review [prompt file] for Opus 4.5 after [reported issue]. Apply only relevant prompt adjustments and explain every modification.
Complete Migration Review 
Perform a complete Opus 4.5 migration for [project]. Detect the provider, update eligible models, review headers and effort settings, assess reported prompt issues, and summarize changes.

Best Practices

  • Confirm the active provider before replacing model identifiers.
  • Apply prompt snippets only for an explicit request or a reproduced behavior issue.
  • Review the final diff and verify current model availability before deployment.

Avoid

  • Do not migrate Haiku model references with this skill.
  • Do not append every prompt snippet without matching a reported issue.
  • Do not assume dated model identifiers or beta flags remain current without provider verification.

Frequently Asked Questions

Which source models can this skill migrate?
It supports Claude Sonnet 4.0, Sonnet 4.5, and Opus 4.1 as migration sources.
Does it migrate Claude Haiku models?
No. Haiku models are explicitly excluded.
Which providers are covered?
Target identifiers cover Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry. Source mappings cover Anthropic, Bedrock, and Vertex AI.
Will it change prompts automatically?
The default migration changes model identifiers. Prompt adjustments are applied only when requested or when a specific behavior issue is reported.
How does it handle the effort setting?
It documents high effort as the migration default and provides the related beta flag. Lower effort levels remain available for cost or latency needs.
Does the skill verify current provider availability?
No. The guide contains dated identifiers and beta settings, so teams should verify current provider documentation before deployment.

Developer Details

Author

anthropics

License

MIT

Skillstore revision

r2

Version notice

The author did not declare a version.

Repository

https://github.com/anthropics/claude-code/tree/main/plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration

Ref

c43861a65bb95efcae259cd161c9d6f4dc7eec6f

Maintenance freshness

7/24/2026

Usage

13 downloads · 258 views

File structure

📁 references/

📄 effort.md

📄 prompt-snippets.md

📄 SKILL.md