fix(integrations): add Kimi /skill: prefix and fix docstrings

- Add SKILL_COLON_AGENTS frozenset and get_invocation_prefix() to
  _invocation_style.py so Kimi resolves to '/skill:' in skills mode
- Switch invoke_prefix_for_integration() to use get_invocation_prefix()
  instead of the binary dollar/slash check
- Update post_process_skill_content docstring (base.py) to cover both
  slash and dollar native invocation forms
- Update _resolve_command_refs_in_skill docstring (presets/__init__.py)
  to document the dollar-prefixed result alongside slash forms

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 65ef91d9-4c31-4f31-a009-ed2093fe7f28
Assisted-by: GitHub Copilot (model: claude-sonnet-4.6, autonomous)

Author: BenBtg

src/specify_cli/_invocation_style.py

@@ -29,6 +29,9 @@
     }
 )
 
+# Agents that render /skill:<name> (skill-colon invocation) when in skills mode.
+SKILL_COLON_AGENTS: frozenset[str] = frozenset({"kimi"})
+
 
 def is_dollar_skills_agent(selected_ai: str | None, ai_skills_enabled: bool) -> bool:
     """Return ``True`` if *selected_ai* uses ``$speckit-<name>`` invocations.
@@ -41,6 +44,21 @@ def is_dollar_skills_agent(selected_ai: str | None, ai_skills_enabled: bool) ->
     return selected_ai in DOLLAR_SKILLS_AGENTS and ai_skills_enabled
 
 
+def get_invocation_prefix(selected_ai: str | None, ai_skills_enabled: bool) -> str:
+    """Return the native invocation prefix for *selected_ai* in skills mode.
+
+    Returns ``"$"`` for dollar-skills agents (Codex, ZCode),
+    ``"/skill:"`` for skill-colon agents (Kimi), and ``"/"`` for all others.
+    """
+    if not isinstance(selected_ai, str):
+        return "/"
+    if selected_ai in DOLLAR_SKILLS_AGENTS and ai_skills_enabled:
+        return "$"
+    if selected_ai in SKILL_COLON_AGENTS and ai_skills_enabled:
+        return "/skill:"
+    return "/"
+
+
 def is_slash_skills_agent(selected_ai: str | None, ai_skills_enabled: bool) -> bool:
     """Return ``True`` if *selected_ai* uses ``/speckit-<name>`` invocations.
 

src/specify_cli/integration_runtime.py

@@ -5,7 +5,7 @@
 from collections.abc import Callable
 from typing import Any
 
-from ._invocation_style import is_dollar_skills_agent
+from ._invocation_style import get_invocation_prefix
 from .integration_state import integration_setting, integration_settings
 
 
@@ -103,4 +103,4 @@ def invoke_prefix_for_integration(
 ) -> str:
     """Resolve the native invocation prefix for an integration's output mode."""
     skills_mode = integration.is_skills_mode(parsed_options, project_root)
-    return "$" if is_dollar_skills_agent(key, skills_mode) else "/"
+    return get_invocation_prefix(key, skills_mode)

src/specify_cli/integrations/base.py

@@ -1597,8 +1597,10 @@ def post_process_skill_content(self, content: str) -> str:
         Called by external skill generators (presets, extensions) to let
         the integration inject agent-specific frontmatter or body
         transformations.  The base implementation injects shared skills
-        guidance for converting dotted hook command names to hyphenated
-        slash commands.  Subclasses may override — see ``ClaudeIntegration``.
+        guidance for converting dotted hook command names to the agent-native
+        hyphenated command invocation (e.g. ``/speckit-git-commit`` or
+        ``$speckit-git-commit``).  Subclasses may override -- see
+        ``ClaudeIntegration``.
         """
         invocation_prefix = "$" if is_dollar_skills_agent(self.key, True) else "/"
         return self._inject_hook_command_note(content, invocation_prefix)

src/specify_cli/presets/__init__.py

@@ -1262,9 +1262,9 @@ def _resolve_skill_command_refs(
 
         Looks up the agent's invoke separator and rewrites each
         ``__SPECKIT_COMMAND_<NAME>__`` placeholder into the matching
-        slash-command invocation — ``/speckit-<cmd>`` for a ``-`` separator,
-        ``/speckit.<cmd>`` for ``.`` — the same rendering the command layer
-        applies via ``CommandRegistrar.register_commands()``.
+        agent-native invocation -- ``/speckit-<cmd>`` or ``$speckit-<cmd>`` for
+        a ``-`` separator, ``/speckit.<cmd>`` for ``.`` -- the same rendering the
+        command layer applies via ``CommandRegistrar.register_commands()``.
 
         For dual-layout agents (e.g. Bob) the separator depends on the
         project's persisted skills state, so — when *project_root* is provided