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fix(agent): complete Claude Opus 4.7 API migration

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Claude Opus 4.7 introduced several breaking API changes that the current
codebase partially handled but not completely. This patch finishes the
migration per the official migration guide at
https://platform.claude.com/docs/en/about-claude/models/migration-guide

Fixes NousResearch/hermes-agent#11137

Breaking-change coverage:

1. Adaptive thinking + output_config.effort — 4.7 is now recognized by
   _supports_adaptive_thinking() (extends previous 4.6-only gate).

2. Sampling parameter stripping — 4.7 returns 400 for any non-default
   temperature / top_p / top_k. build_anthropic_kwargs drops them as a
   safety net; the OpenAI-protocol auxiliary path (_build_call_kwargs)
   and AnthropicCompletionsAdapter.create() both early-exit before
   setting temperature for 4.7+ models. This keeps flush_memories and
   structured-JSON aux paths that hardcode temperature from 400ing
   when the aux model is flipped to 4.7.

3. thinking.display = "summarized" — 4.7 defaults display to "omitted",
   which silently hides reasoning text from Hermes's CLI activity feed
   during long tool runs. Restoring "summarized" preserves 4.6 UX.

4. Effort level mapping — xhigh now maps to xhigh (was xhigh→max, which
   silently over-efforted every coding/agentic request). max is now a
   distinct ceiling per Anthropic's 5-level effort model.

5. New stop_reason values — refusal and model_context_window_exceeded
   were silently collapsed to "stop" (end_turn) by the adapter's
   stop_reason_map. Now mapped to "content_filter" and "length"
   respectively, matching upstream finish-reason handling already in
   bedrock_adapter.

6. Model catalogs — claude-opus-4-7 added to the Anthropic provider
   list, anthropic/claude-opus-4.7 added at top of OpenRouter fallback
   catalog (recommended), claude-opus-4-7 added to model_metadata
   DEFAULT_CONTEXT_LENGTHS (1M, matching 4.6 per migration guide).

7. Prefill docstrings — run_agent.AIAgent and BatchRunner now document
   that Anthropic Sonnet/Opus 4.6+ reject a trailing assistant-role
   prefill (400).

8. Tests — 4 new tests in test_anthropic_adapter covering display
   default, xhigh preservation, max on 4.7, refusal / context-overflow
   stop_reason mapping, plus the sampling-param predicate. test_model_metadata
   accepts 4.7 at 1M context.

Tested on macOS 15.5 (darwin). 119 tests pass in
tests/agent/test_anthropic_adapter.py, 1320 pass in tests/agent/.
This commit is contained in:
trevthefoolish 2026-04-16 12:35:43 -05:00 • committed by kshitij
parent 1ccd063786
commit 0517ac3e93
8 changed files with 155 additions and 19 deletions
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batch_runner.py
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@ -561,7 +561,10 @@ class BatchRunner:
provider_sort (str): Sort providers by price/throughput/latency (optional)
max_tokens (int): Maximum tokens for model responses (optional, uses model default if not set)
reasoning_config (Dict): OpenRouter reasoning config override (e.g. {"effort": "none"} to disable thinking)
prefill_messages (List[Dict]): Messages to prepend as prefilled conversation context (few-shot priming)
prefill_messages (List[Dict]): Messages to prepend as prefilled conversation context (few-shot priming).
NOTE: Anthropic Sonnet 4.6+ and Opus 4.6+ reject a trailing assistant-role prefill
(400 error). For those models use output_config.format or structured-output
schemas instead. Safe here for user-role priming and for older Claude / non-Claude models.
max_samples (int): Only process the first N samples from the dataset (optional, processes all if not set)
"""
self.dataset_file = Path(dataset_file)