feat: parse DeepSeek V4 DSML tool_calls from assistant text

Add dsml_tool_parse per upstream HF encoding README (invoke/parameter,
string true|false, JSON for non-strings). Normalize <||DSML|| gateways.

Wire into run_oclaw_direct_loop when AIA_DSML_TEXT_TOOLS is on or
base_url/model suggests DeepSeek; skip DSML repair retry in that mode.
Strip the first tool_calls block from persisted assistant body. Finalize
pass keeps DSML disabled so no tools run after the no-tool round.

Tests cover parser variants and direct_loop execution for DeepSeek URL
and forced env.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_dsml_tool_parse.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+from oclaw.runtime.dsml_tool_parse import (
+    normalize_dsml_markup,
+    strip_first_dsml_tool_calls_block,
+    try_parse_deepseek_v4_dsml_tool_calls,
+)
+
+
+def test_normalize_ascii_pipe_variant() -> None:
+    raw = "<||DSML||tool_calls>x</||DSML||tool_calls>"
+    n = normalize_dsml_markup(raw)
+    assert "\uFF5cDSML\uFF5c" in n
+
+
+def test_parse_official_delimiters_single_invoke() -> None:
+    p = "\uFF5c"
+    text = (
+        f"prefix\n<{p}DSML{p}tool_calls>\n"
+        f"<{p}DSML{p}invoke name=\"run_command\">\n"
+        f"<{p}DSML{p}parameter name=\"command\" string=\"true\">echo hi</{p}DSML{p}parameter>\n"
+        f"</{p}DSML{p}invoke>\n"
+        f"</{p}DSML{p}tool_calls>\nsuffix"
+    )
+    calls = try_parse_deepseek_v4_dsml_tool_calls(text)
+    assert calls is not None and len(calls) == 1
+    assert calls[0].name == "run_command"
+    assert calls[0].arguments == {"command": "echo hi"}
+
+
+def test_parse_pipe_variant_and_json_param() -> None:
+    text = (
+        "<||DSML||tool_calls>\n"
+        "<||DSML||invoke name=\"echo_tool\">\n"
+        "<||DSML||parameter name=\"x\" string=\"false\">42</||DSML||parameter>\n"
+        "</||DSML||invoke>\n"
+        "</||DSML||tool_calls>"
+    )
+    calls = try_parse_deepseek_v4_dsml_tool_calls(text)
+    assert calls is not None and len(calls) == 1
+    assert calls[0].name == "echo_tool"
+    assert calls[0].arguments["x"] == 42
+
+
+def test_parse_two_invokes() -> None:
+    text = (
+        "<||DSML||tool_calls>\n"
+        "<||DSML||invoke name=\"a\"></||DSML||invoke>\n"
+        "<||DSML||invoke name=\"b\"></||DSML||invoke>\n"
+        "</||DSML||tool_calls>"
+    )
+    calls = try_parse_deepseek_v4_dsml_tool_calls(text)
+    assert calls is not None and [c.name for c in calls] == ["a", "b"]
+
+
+def test_strip_removes_block_keeps_prefix() -> None:
+    text = "hello\n<||DSML||tool_calls>\n<||DSML||invoke name=\"x\"></||DSML||invoke>\n</||DSML||tool_calls>\n"
+    s = strip_first_dsml_tool_calls_block(text)
+    assert s is not None
+    assert "hello" in s
+    assert "tool_calls" not in s
+
+
+def test_malformed_returns_none() -> None:
+    assert try_parse_deepseek_v4_dsml_tool_calls("<||DSML||tool_calls>broken") is None