Use native DeepSeek Responses schema requests for structured inference

AGENTS.md

@@ -37,6 +37,12 @@ live in `anvil-client`; CLI and Python use `HostedClient`. Keep package and path
 dependency versions in lockstep. Python task cancellation must cancel native work,
 and client close must cancel outstanding calls. Build wheels and run installed-wheel
 tests before publishing. The existing `python/` package remains the CLI launcher.
+DeepSeek structured inference uses the stateless Responses backend; agent chat
+keeps its Chat Completions backend. Native schema requests must not
+prepend dynamic schema text ahead of caller messages. Reject incomplete Responses
+output even when its text parses as valid JSON. DeepSeek Responses and beta
+strict tool calls have returned schema violations in live probes: native format
+support is not an enforcement guarantee, and local validation must remain.
 
 ## Release workflow
 

Cargo.toml

@@ -7,7 +7,7 @@ default-members = ["."]
 
 [package]
 name = "brokk-anvil"
-version = "0.28.3"
+version = "0.28.4"
 edition = "2024"
 description = "Anvil: Rust ACP server with first-run setup for Codex, Ollama, and OpenRouter"
 license = "LGPL-3.0-only"
@@ -36,8 +36,8 @@ axum = { version = "0.8", optional = true }
 # the published crates are namespaced. Both are versioned in lockstep with this
 # crate: bump the requirement, the sub-crate's version, and the root version
 # together on every release (CI enforces the match).
-anvil-minimizer = { package = "brokk-anvil-minimizer", version = "0.28.3", path = "crates/anvil-minimizer" }
-anvil-client = { package = "brokk-anvil-client", version = "0.28.3", path = "crates/anvil-client", features = ["bedrock-credits"] }
+anvil-minimizer = { package = "brokk-anvil-minimizer", version = "0.28.4", path = "crates/anvil-minimizer" }
+anvil-client = { package = "brokk-anvil-client", version = "0.28.4", path = "crates/anvil-client", features = ["bedrock-credits"] }
 anyhow = "1"
 clap = { version = "4", features = ["derive", "env"] }
 # Pure-parsing library, also built as a wasm32-wasip2 binary that
@@ -114,7 +114,7 @@ tempfile = "3"
 # Enables anvil-client's `test-support` feature so Anvil's tests can use
 # `openrouter_auth::test_support` (env-var guard/scope helpers). Feature
 # unification means only test builds see it; published binaries never do.
-anvil-client = { package = "brokk-anvil-client", version = "0.28.3", path = "crates/anvil-client", features = ["bedrock-credits", "test-support"] }
+anvil-client = { package = "brokk-anvil-client", version = "0.28.4", path = "crates/anvil-client", features = ["bedrock-credits", "test-support"] }
 
 [build-dependencies]
 serde = { version = "1", features = ["derive"] }

crates/anvil-client-python/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "brokk-anvil-client-python"
-version = "0.28.3"
+version = "0.28.4"
 edition = "2024"
 license = "LGPL-3.0-only"
 description = "Native asynchronous Python bindings for Anvil's LLM client"
@@ -12,7 +12,7 @@ name = "_native"
 crate-type = ["cdylib"]
 
 [dependencies]
-anvil-client = { package = "brokk-anvil-client", path = "../anvil-client", version = "0.28.3" }
+anvil-client = { package = "brokk-anvil-client", path = "../anvil-client", version = "0.28.4" }
 pyo3 = { version = "0.29", features = ["abi3-py311"] }
 pyo3-async-runtimes = { version = "0.29", features = ["tokio-runtime"] }
 serde = { version = "1", features = ["derive"] }

crates/anvil-client-python/tests/test_client.py

@@ -21,7 +21,10 @@ def log_message(self, *args):
     def do_POST(self):
         request = json.loads(self.rfile.read(int(self.headers["Content-Length"])))
         self.server.requests.append(request)
-        prompt = request["messages"][-1]["content"]
+        # The native client may append an in-band schema for JSON-mode
+        # providers. Dispatch mock behavior from the original caller input.
+        prompt = next(message["content"] for message in request["messages"]
+                      if message["role"] == "user")
         if "slow" in prompt:
             time.sleep(0.5)
         output = {"wrong": True} if "invalid" in prompt else {"ok": True}

crates/anvil-client/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "brokk-anvil-client"
-version = "0.28.3"
+version = "0.28.4"
 edition = "2024"
 description = "Standalone LLM client extracted from Anvil: OpenAI-compatible, Bedrock, Codex, Meta/Muse, Grok, Ollama, OpenRouter, DeepSeek, and Kimi backends with auth, discovery, usage accounting, and ChatGPT-subscription transcription"
 license = "LGPL-3.0-only"