fix: surface a plain-string interrupt's payload in the HITL prompt (Closes #95)

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.6.24 - 2026-07-25
+
+### Fixed
+- **A plain-string `interrupt("Approve deleting X?")` — the canonical LangGraph HITL form — now
+  shows the human what they're approving, instead of "(no action details provided)" (gh #95).**
+  The approval menu dropped the payload of a bare-string/scalar interrupt (dict payloads rendered
+  fine), so a confirmation like `interrupt("Approve deleting ALL files in /home?")` asked the user
+  to Approve/Reject blind — defeating the point of HITL. The renderer already handled a scalar
+  (`format_interrupt_request` returns `str(action)`); the payload was dropped upstream in
+  `langstage-core`'s `on_interrupt` handler, which `json.loads()`'d the string, failed on a
+  non-JSON question, and fell back to an empty request. Fixed in **langstage-core 1.0.28** on the
+  chunk wire the CLI consumes; this raises the floor to `>= 1.0.28` so a fresh install gets it.
+
 ## 0.6.23 - 2026-07-23
 
 ### Fixed

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "langstage-cli"
-version = "0.6.23"
+version = "0.6.24"
 description = "The terminal stage for your LangGraph agent — Claude Code-style CLI for any CompiledGraph"
 readme = "README.md"
 requires-python = ">=3.11"
@@ -31,7 +31,7 @@ dependencies = [
     # is a HARD dep. A bare `pip install langstage-cli` must be able to run a turn.
     # >=1.0.6 for the shared preflight primitive core.verify() used by --verify.
     # >=1.0.14 for describe(configurable=) — the single complete config diagnostic.
-    "langstage-core[agui]>=1.0.24",
+    "langstage-core[agui]>=1.0.28",
     "click>=8.0.0",
     "python-dotenv",
 ]

tests/test_agui_stream.py

@@ -201,3 +201,34 @@ def test_non_streaming_tool_agent_surfaces_tool_call_and_result():
     assert results and results[0]["tool_result"] == "Sunny, 24C", (
         "tool result dropped on the CLI snapshot path (needs langstage-core >= 1.0.24, gh #91)"
     )
+
+
+def test_plain_string_interrupt_reaches_the_renderer_with_its_payload():
+    """gh #95: a bare-string interrupt("Approve X?") must surface its text to the CLI,
+    not "(no action details provided)". The fix is in langstage-core (>= 1.0.28, on the
+    chunk wire the CLI consumes); this pins that the frame carries the string and the
+    CLI renderer shows it."""
+    from langgraph.checkpoint.memory import MemorySaver
+    from langgraph.types import interrupt
+
+    from langstage_cli.cli import format_interrupt_request
+
+    def ask(state):
+        interrupt("Approve deleting ALL files in /home? (y/n)")
+        return {"messages": [AIMessage(content="done")]}
+
+    b = StateGraph(MessagesState)
+    b.add_node("ask", ask)
+    b.add_edge(START, "ask")
+    b.add_edge("ask", END)
+    agent = build_session_agent(b.compile(checkpointer=MemorySaver()))
+
+    chunks = _collect(agent, "go")
+    interrupts = [c for c in chunks if c.get("status") == "interrupt"]
+    assert interrupts, chunks
+    ars = interrupts[0]["interrupt"]["action_requests"]
+    assert ars == ["Approve deleting ALL files in /home? (y/n)"], (
+        "string interrupt dropped (needs core >= 1.0.28, gh #95)"
+    )
+    # the renderer surfaces the string (not "(no action details provided)")
+    assert format_interrupt_request(ars[0])[0] == "Approve deleting ALL files in /home? (y/n)"