Squash Odysseus development history

2026-11-05 20:52:22 +01:00 · 2026-09-11 06:04:19 +00:00
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+# Anthropic Provider Shape
+
+Last updated: dev@e71f8ce | 2026-08-25
+
+## Scope
+
+Canonical placeholder vendor ID `anthropic`; Anthropic Messages runtime
+adapter in `src/llm_core.py`. There is no dedicated Anthropic capability-reader
+module; explicit/auto-detected Anthropic payloads use the generic identity-only
+reader.
+
+## Catalog Shape
+
+`GET /v1/models` returns `data[]` model resources with `id`, `type: model`,
+`display_name`, and `created_at`, plus pagination metadata. These fields prove
+identity/availability only. Do not assume all listed Claude models share
+vision, tools, reasoning, sampling, or context limits.
+
+## Request And Response Shape
+
+Native Messages uses a top-level `system`, alternating `messages`, content
+blocks, `tools[].input_schema`, `tool_use` assistant blocks, and `tool_result`
+user blocks. Text, thinking, signatures, server-tool blocks, and tool calls are
+typed content rather than OpenAI roles/fields. Preserve block IDs/signatures
+needed for continuation.
+
+Sampling and thinking support can be version/model specific. The Opus 4.7+ sampling omission is a model-scoped runtime observation, not an Anthropic-wide rule. Runtime version parsing accepts explicit major/minor IDs and later major-only IDs such as `claude-opus-5`, treats a missing minor as `.0`, caps both components so date stamps cannot be misread as versions, and keeps legacy Claude 3 Opus sampling intact. Anthropic-compatible proxies are Anthropic dialect only when configured or their exact payload/endpoint shape proves it (#3110).
+
+## Fallback And Safety
+
+Runtime and canonical reader detection use label-bounded Anthropic host matching or an explicit endpoint kind. A provider using Anthropic Messages through another host must be explicit. Identity-only model cards remain unknown.
+
+## Current Gaps
+
+- The public model list does not provide per-model canonical capability data.
+- There is no dedicated Anthropic canonical reader; only `id`, `name`, or
+  `model` identity survives generic normalization.
+- Runtime model-version parsing needs structured identity before a later
+  consumer can centralize sampling exceptions without another name matcher.