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Update claude-api skill: Claude Opus 5 (#1476)

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* Update claude-api skill: Claude Opus 5

- Add Claude Opus 5 (`claude-opus-5`) as the default model across all
  SDK examples, model tables, pricing, and migration guidance.
- Add an Opus 5 migration section covering the API changes that come
  with it, and move Opus 4.8 into the previous-generation slot.
- Drop the Opus 4.7 fast-mode guidance, which no longer applies.
- Scope the server-side fallbacks beta header to the current version.

* Update claude-api skill: Opus 5 fast-follow corrections

- Server-side refusal fallbacks are available on Claude Platform on AWS,
  not just the Claude API. Correct the availability statements in
  SKILL.md, the migration guide, and the platform-availability table.
- Simplify the effort guidance: start at `high` (the API default) and
  sweep down, rather than starting at `xhigh` for coding work.
- Add a time-to-first-token section with the prompt instruction that
  reduces pre-answer thinking on latency-sensitive routes.
- Replace the two separate thinking-disabled mitigations with the single
  combined instruction that covers both failure modes.
This commit is contained in:
Lance Martin
2026-07-24 13:12:34 -07:00
committed by GitHub
parent 1f630fdf92
commit b29e7cf65e
50 changed files with 608 additions and 278 deletions
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skills/claude-api/shared/platform-availability.md
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@@ -41,7 +41,8 @@ Columns: **1P** = first-party Claude API, **P-AWS** = Claude Platform on AWS (An
|   Files API | β | β | ❌ | ❌ | β | |
|   Models API | ✅ | ✅ | ❌ | ❌ | ❌ | |
| **Other** | | | | | | |
|   Mid-conversation system messages | ✅ | ✅ | ❌ | ❌ | ❌ | Claude Opus 4.8 only |
|   Mid-conversation system messages | ✅ | ✅ | ❌ | ❌ | ❌ | Claude Opus 5, Claude Opus 4.8, Claude Fable 5, Claude Mythos 5; not Claude Sonnet 5 |
|   Server-side `fallbacks` | β | β | ❌ | ❌ | ❌ | `"default"` → beta `server-side-fallback-2026-07-01`; array form → beta `server-side-fallback-2026-06-01` |
|   Fast mode | β | ❌ | ❌ | ❌ | ❌ | Research preview, beta `fast-mode-2026-02-01`, first-party API only |
|   Cache diagnostics | β | ❌ | ❌ | ❌ | ❌ | First-party API only |
|   Task budgets | β | β | ❌ | ❌ | ❌ | Beta header `task-budgets-2026-03-13`; 3P availability not documented — assume unsupported |