Writer model provider (strands-agents#228)

* feat: palmyra provider initial version

* test: unit tests for Palmyra provider

* feat: message content formatter for different palmyra models

* test: integration tests for palmyra provider

* refactor: changes made by hatch formatter

* refactor: rename filew with Writer name instead of Palmyra

* refactor: change writer provider integration tests structure

* feat: structured outputs for Writer provider

* refactor: add an upper version limit of writer-sdk dependency

* feat: image inputs for Writer models

* refactor: change name of config parameter to specify model from 'model' to 'model_id'

* fix: solve issue for case of empty metadata

* fix: delete unused config arguments

* fix: pyproject.toml fix to pass linters

* fix: fix methods signature to pass updated tests

* feat: implement usage of async Writer client istead of sync

* test: add tests for async agent calls

Author: yanomaly

pyproject.toml

@@ -83,6 +83,10 @@ openai = [
 otel = [
     "opentelemetry-exporter-otlp-proto-http>=1.30.0,<2.0.0",
 ]
+writer = [
+    "writer-sdk>=2.2.0,<3.0.0"
+]
+
 a2a = [
     "a2a-sdk[sql]>=0.2.11",
     "uvicorn>=0.34.2",
@@ -96,7 +100,7 @@ a2a = [
 source = "vcs"
 
 [tool.hatch.envs.hatch-static-analysis]
-features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel","mistral"]
+features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel", "mistral", "writer"]
 dependencies = [
   "mypy>=1.15.0,<2.0.0",
   "ruff>=0.11.6,<0.12.0",
@@ -120,7 +124,7 @@ lint-fix = [
 ]
 
 [tool.hatch.envs.hatch-test]
-features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel","mistral"]
+features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel", "mistral", "writer"]
 extra-dependencies = [
     "moto>=5.1.0,<6.0.0",
     "pytest>=8.0.0,<9.0.0",
@@ -136,7 +140,7 @@ extra-args = [
 
 [tool.hatch.envs.dev]
 dev-mode = true
-features = ["dev", "docs", "anthropic", "litellm", "llamaapi", "ollama", "otel","mistral"]
+features = ["dev", "docs", "anthropic", "litellm", "llamaapi", "ollama", "otel", "mistral", "writer"]
 
 [tool.hatch.envs.a2a]
 dev-mode = true