feat(status): append session recap to /status output (#27176)

Adds a pure-local recap of recent session activity — turn counts,
tools used, files touched, last user ask, last assistant reply —
appended to the existing /status output. Useful when juggling multiple
sessions and you want a one-glance reminder of where this one left off.

Inspired by Claude Code 2.1.114's /recap, but folded into /status so
we don't add a 6th info command. Pure local computation: no LLM call,
no auxiliary model, no prompt-cache invalidation, instant and free.

Salvage of #18587 — kept the shared hermes_cli.session_recap.build_recap
helper and its 13 unit tests, dropped the /recap slash command +
ACTIVE_SESSION_BYPASS_COMMANDS entry + Level-2 bypass since /status
already covers both surfaces.

Tailored to hermes-agent's tool vocabulary: file-editing tools
(patch, write_file, read_file, skill_manage, skill_view) surface
touched paths; tool-call counts highlight which classes of work
drove the session.

Source: https://code.claude.com/docs/en/whats-new/2026-w17

tests/hermes_cli/test_session_recap.py

@@ -0,0 +1,180 @@
+"""Unit tests for hermes_cli.session_recap."""
+from __future__ import annotations
+
+import json
+
+import pytest
+
+from hermes_cli.session_recap import build_recap
+
+
+def _user(text):
+    return {"role": "user", "content": text}
+
+
+def _assistant(text=None, tool_calls=None):
+    msg = {"role": "assistant", "content": text}
+    if tool_calls:
+        msg["tool_calls"] = tool_calls
+    return msg
+
+
+def _tool_call(name, args):
+    return {
+        "id": f"call_{name}",
+        "type": "function",
+        "function": {"name": name, "arguments": json.dumps(args)},
+    }
+
+
+def _tool_result(content="ok"):
+    return {"role": "tool", "content": content}
+
+
+def test_empty_history():
+    out = build_recap([])
+    assert "Session recap" in out
+    assert "nothing to recap" in out
+
+
+def test_header_shows_title_when_provided():
+    out = build_recap([_user("hello")], session_title="Refactor the adapter")
+    assert "Refactor the adapter" in out.splitlines()[0]
+
+
+def test_header_shows_short_id_when_no_title():
+    out = build_recap([_user("hello")], session_id="abcdef1234567890")
+    assert "abcdef12" in out.splitlines()[0]
+
+
+def test_counts_recent_turns():
+    msgs = [
+        _user("one"),
+        _assistant("first reply"),
+        _user("two"),
+        _assistant("second reply"),
+    ]
+    out = build_recap(msgs)
+    assert "2 user turn" in out
+    assert "assistant repl" in out
+
+
+def test_last_ask_and_reply_are_surfaced():
+    msgs = [
+        _user("old question"),
+        _assistant("old answer"),
+        _user("summarise the docs"),
+        _assistant("here is the summary of the docs you asked for"),
+    ]
+    out = build_recap(msgs)
+    assert "summarise the docs" in out
+    assert "summary of the docs" in out
+
+
+def test_tool_counts_and_files():
+    msgs = [
+        _user("edit the readme and run tests"),
+        _assistant(
+            tool_calls=[
+                _tool_call("read_file", {"path": "README.md"}),
+                _tool_call("patch", {"path": "README.md"}),
+            ]
+        ),
+        _tool_result(),
+        _tool_result(),
+        _assistant(
+            tool_calls=[
+                _tool_call("terminal", {"command": "pytest"}),
+            ]
+        ),
+        _tool_result("tests ok"),
+        _assistant("All green."),
+    ]
+    out = build_recap(msgs)
+    assert "patch×1" in out
+    assert "terminal×1" in out
+    assert "read_file×1" in out
+    # README.md should appear (may include cwd-relative prefix stripping).
+    assert "README.md" in out
+
+
+def test_tool_preview_length_truncates_long_user_prompt():
+    long = "x " * 500
+    out = build_recap([_user(long)])
+    ask_line = [l for l in out.splitlines() if "Last ask" in l][0]
+    assert len(ask_line) < 300  # truncated with ellipsis
+    assert "…" in ask_line
+
+
+def test_respects_recent_window():
+    # 30 turns of user+assistant; only the most recent 20 should be summarised.
+    msgs = []
+    for i in range(30):
+        msgs.append(_user(f"question {i}"))
+        msgs.append(_assistant(f"answer {i}"))
+    out = build_recap(msgs)
+    # We scoped to the 20-turn window but show "of 30/30 total".
+    assert "of 30/30 total" in out
+
+
+def test_multimodal_content_blocks_flattened():
+    msgs = [
+        {
+            "role": "user",
+            "content": [
+                {"type": "text", "text": "check this file"},
+                {"type": "image_url", "image_url": {"url": "..."}},
+            ],
+        },
+        _assistant("Looked at your image."),
+    ]
+    out = build_recap(msgs)
+    assert "check this file" in out
+    assert "Looked at your image" in out
+
+
+def test_handles_arguments_as_dict_not_string():
+    # Some providers return arguments already as a dict.
+    msgs = [
+        _user("go"),
+        {
+            "role": "assistant",
+            "content": None,
+            "tool_calls": [
+                {
+                    "type": "function",
+                    "function": {
+                        "name": "patch",
+                        "arguments": {"path": "foo.py"},
+                    },
+                }
+            ],
+        },
+    ]
+    out = build_recap(msgs)
+    assert "patch×1" in out
+    assert "foo.py" in out
+
+
+def test_no_assistant_activity_hint():
+    out = build_recap([_user("just sent my first message")])
+    assert "no assistant activity" in out or "Last ask" in out
+
+
+def test_tool_message_count_reported():
+    msgs = [
+        _user("go"),
+        _assistant(tool_calls=[_tool_call("read_file", {"path": "a"})]),
+        _tool_result(),
+        _tool_result(),
+        _assistant("done"),
+    ]
+    out = build_recap(msgs)
+    assert "2 tool result" in out
+
+
+def test_ignores_non_mapping_entries_gracefully():
+    msgs = [None, "stray", _user("hi"), _assistant("hello")]
+    # Should not raise.
+    out = build_recap(msgs)
+    assert "Session recap" in out