claude-api-skill changedagents-and-tools/agent-skills/claude-api-skill
Nearest release: v2.1.281, published an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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14 Aug 2026
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Recorded edits6to this page, all time
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112112/claude-api migrate apps/api.py and apps/worker.py to claude-opus-5-5
113113```
114114
115When the scope is ambiguous (for example, a bare `/claude-api migrate to claude-opus-5`), the skill asks you to choose between the entire working directory, a specific subdirectory, or an explicit file list before editing any files. This applies to both Messages API and Managed Agents callers.
115When the scope is ambiguous (for example, a bare `/claude-api migrate to claude-opus-5-5`), the skill asks you to choose between the entire working directory, a specific subdirectory, or an explicit file list before editing any files. This applies to both Messages API and Managed Agents callers.
116116
117117The skill handles:
118118
119* **Model ID swaps**, including typed SDK constants (`Model.CLAUDE_OPUS_4_8` → `Model.CLAUDE_OPUS_5`) across all supported languages, and classifies each file as a caller, a model definer, or an opaque string reference before editing
119* **Model ID swaps**, including typed SDK constants (`Model.CLAUDE_OPUS_4_8` → `Model.CLAUDE_OPUS_5_5`) across all supported languages, and classifies each file as a caller, a model definer, or an opaque string reference before editing
120120* **Cloud platform detection**, preserving platform-specific model ID formats (for example, the `anthropic.` prefix on Amazon Bedrock) and skipping changes for features that are unavailable on partner-operated platforms
121121* **Breaking parameter changes**, such as removing `temperature`, `top_p`, and `top_k` for Claude Opus 4.8 and Claude Opus 4.7, and converting `thinking: {type: "enabled", budget_tokens: N}` to `thinking: {type: "adaptive"}`
122122* **Prefill replacement**, converting assistant-message prefill patterns to [structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs) where applicable
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128128
129129As it edits, the skill explains each change and its motivation inline. On completion, it produces a checklist of items that require manual verification (typically integration tests, length-control prompt tuning, and cost/rate-limit re-baselining).
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131For the full list of model-specific changes the skill applies, see [Migrating to Claude Opus 5.5 from Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5-5/migration-guide#migrating-from-claude-opus-5), [Migrating to Claude Opus 5 from Claude Opus 4.8](https://platform.claude.com/docs/en/models/opus-5/migration-guide#migrating-from-claude-opus-4-8-to-claude-opus-5), and [Migrating to Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/migration-guide).
131For the full list of model-specific changes the skill applies, see [Migrating to Claude Opus 5.5 from Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5-5/migration-guide#migrating-from-claude-opus-5), [Migrating to Claude Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/en/models/opus-5-5/migration-guide#migrating-from-claude-opus-4-8), and [Migrating to Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/migration-guide).
132132
133133## Setting up a Managed Agent
134134
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