Add Claude Sonnet 5 support

Uses the anthropic-v2 variant set (adaptive summarized thinking) like the
other gen-5 models, matched via the sonnet-5 regex in variantsByModel.

🤖 Generated with [ECA](https://eca.dev) (nubank-anthropic/opus-4.8 - max)

Co-Authored-By: eca-agent <git@eca.dev>

Author: ericdallo

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Add built-in variants for `glm-5.2` (case-insensitive): `none`, `medium`, `high`.
 - New `/export` and `/import` commands to transfer a chat between machines as a structured, resumable file preserving model, variant, usage and chat-id. #28
+- Add Claude Sonnet 5 support.
 
 ## 0.143.1
 

docs/config/variants.md

@@ -27,9 +27,9 @@ ECA ships with built-in variants for some known models via the `variantsByModel`
     | `high`     | `{"output_config": {"effort": "high"}, "thinking": {"type": "adaptive"}}` |
     | `max`      | `{"output_config": {"effort": "max"}, "thinking": {"type": "adaptive"}}` |
 
-=== "Anthropic (opus 4.7+, fable/mythos 5)"
+=== "Anthropic (opus 4.7+, sonnet/fable/mythos 5)"
 
-    Applies to models matching `opus-4-7`, `opus-4-8`, `fable-5`, `mythos-5` (any separator: `-`, `.`, `_`).
+    Applies to models matching `opus-4-7`, `opus-4-8`, `sonnet-5`, `fable-5`, `mythos-5` (any separator: `-`, `.`, `_`).
 
     | Variant    | Payload |
     | ---------- | ------- |

src/eca/config.clj

@@ -102,6 +102,7 @@
                             :key "${env:ANTHROPIC_API_KEY}"
                             :requiresAuth? true
                             :models {"claude-sonnet-4-6" {}
+                                     "claude-sonnet-5" {}
                                      "claude-opus-4-6" {}
                                      "claude-opus-4-7" {}
                                      "claude-opus-4-8" {}
@@ -206,7 +207,7 @@
               :shellCommand {:summaryMaxLength 35}
               :outputTruncation {:lines 2000 :sizeKb 50}}
    :variantsByModel {".*sonnet[-._]4[-._]6|opus[-._]4[-._][56]" {:variants anthropic-variants}
-                     ".*opus[-._]4[-._][78]|.*fable[-._]5|.*mythos[-._]5" {:variants anthropic-v2-variants}
+                     ".*opus[-._]4[-._][78]|.*sonnet[-._]5|.*fable[-._]5|.*mythos[-._]5" {:variants anthropic-v2-variants}
                      ".*gpt[-._]5(?:[-._](?:2|4|5)(?!\\d)|[-._]3[-._]codex)" {:variants openai-variants
                                                                               :excludeProviders ["github-copilot"]}
                      ".*deepseek[-._]v4[-._]pro" {:variants deepseek-variants

src/eca/models.clj

@@ -149,6 +149,7 @@
     "anthropic/claude-opus-4-7"
     "anthropic/claude-opus-4.8"
     "anthropic/claude-opus-4-8"
+    "anthropic/claude-sonnet-5"
     "anthropic/claude-fable-5"
     "anthropic/claude-mythos-5"
     "anthropic/claude-haiku-4-5-20251001"})