feat(integration): update Kimi integration for Kimi Code CLI (#2979)

* feat(integration): update Kimi integration for Kimi Code CLI

Update the Kimi integration to target the new Kimi Code CLI
(MoonshotAI/kimi-code) layout:

- Change skills directory from .kimi/skills/ to .kimi-code/skills/
- Change context file from KIMI.md to AGENTS.md
- Extend --migrate-legacy to move old .kimi/skills/ installs and
  migrate KIMI.md user content to AGENTS.md
- Clean up leftover legacy .kimi/skills/ directories on teardown
- Update devcontainer installer to @moonshot-ai/kimi-code
- Update docs and tests

Relates to #1532

* fix(integration): align Kimi dispatch and harden legacy migration

- Override build_command_invocation to emit /skill:speckit-<stem>
  so dispatched commands match Kimi Code CLI's native slash syntax.
- Skip symlinked .kimi/skills directories during legacy migration
  and teardown to avoid operating on files outside the project.
- Remove kimi from the multi-install-safe integrations table.
- Add tests for command invocation and symlink safety.

* fix(integration): resolve custom context markers in Kimi legacy migration

Use IntegrationBase._resolve_context_markers() when migrating legacy
KIMI.md content so that projects with customized context_markers in
.specify/extensions/agent-context/agent-context-config.yml have the
managed section stripped with the correct markers instead of the
hard-coded defaults.

Adds a test verifying custom markers are respected during
--migrate-legacy.

* fix(integration): harden Kimi legacy migration against symlinked paths

* fix(kimi): guard symlinked SKILL.md during migration and teardown

* docs(kimi): mention KIMI.md→AGENTS.md migration in --migrate-legacy help

The --migrate-legacy help text listed only the skills directory move and
dotted→hyphenated renaming, but the flag also migrates KIMI.md user content
into AGENTS.md. Align the help with the actual behavior, docs, and tests.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(kimi): validate legacy migration destination; clarify docstrings

Address Copilot review feedback on PR #2979:

- setup(): gate skills migration on _is_safe_legacy_dir(new_skills_dir)
  as well as the source. base setup() already rejects a destination that
  escapes the project root, but an in-tree symlinked .kimi-code/skills
  (e.g. -> .) could still misdirect the move; this gives the destination
  the same symlink-component protection as the source.
- _migrate_legacy_kimi_dotted_skills: rewrite docstring as a compatibility
  shim describing same-path delegation to _migrate_legacy_kimi_skills_dir.
- test_presets: clarify that the dotted-skill test exercises legacy naming
  under the current .kimi-code/ base, not the legacy .kimi/ location.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(kimi): harden legacy KIMI.md→AGENTS.md context migration

- Skip context-file migration when the agent-context extension is
  disabled, matching upsert/remove_context_section opt-out behavior so
  an opted-out project's KIMI.md/AGENTS.md are left untouched.
- Safely skip (instead of raising) on filesystem edge cases: unreadable
  or non-UTF-8 KIMI.md, and AGENTS.md existing as a non-file/unwritable.
- Refuse to migrate a corrupted managed section (single marker, or end
  before start) so a partial managed block is never copied into
  AGENTS.md; KIMI.md is preserved for manual repair.

Add regression tests for all three cases.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Approve fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* chore(kimi): revert CHANGELOG.md edit (auto-generated)

The CHANGELOG is generated from merged PR titles, so a hand-written entry
is redundant; it was also placed under the already-released 0.10.2 section,
which would make those release notes historically inaccurate. Revert to
match main per maintainer feedback.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* test(kimi): skip symlink-safety tests when symlinks are unavailable

The Kimi legacy-migration safety tests create symlinks to assert that
migration/teardown never follow them out of the project. Symlink creation
fails on Windows without the create-symlink privilege and in some restricted
CI sandboxes, so these tests errored during setup instead of skipping.

Wrap every symlink_to() call in a shared _symlink_or_skip() helper that
pytest.skip()s on OSError/NotImplementedError, matching the guard pattern
already used by one of these tests. Verified on Windows: the 6 symlink tests
now skip cleanly (51 passed, 6 skipped) instead of erroring.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(kimi): reject symlinked skills destination before install

Add a destination symlink pre-check in KimiIntegration.setup() before
super().setup() writes any SKILL.md. The base class only rejects a
destination that escapes project_root after resolve(), so an in-tree
symlinked .kimi-code/.kimi-code/skills (e.g. `-> .`) would still
misdirect writes into an unintended in-tree location (./skills/).

Extract the symlink-component walk into a shared _has_symlinked_component()
helper and reuse it from _is_safe_legacy_dir(). Add a regression test.

Also clarify that --migrate-legacy only migrates KIMI.md -> AGENTS.md when
the agent-context extension is enabled, in the CLI help text and the
integration docs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Refactor formatting and simplify logic in Kimi integration

* fix(kimi): reject symlinked target dir during legacy skills migration

When the migration destination already exists, guard against a symlinked
(or non-directory) target_dir before comparing SKILL.md bytes, so the
comparison never follows a link outside the project root. Also skip a
missing/non-file target SKILL.md explicitly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

tests/test_agent_config_consistency.py

@@ -226,17 +226,17 @@ class TestAgentConfigConsistency:
     def test_kimi_in_agent_config(self):
         """AGENT_CONFIG should include kimi with correct folder and commands_subdir."""
         assert "kimi" in AGENT_CONFIG
-        assert AGENT_CONFIG["kimi"]["folder"] == ".kimi/"
+        assert AGENT_CONFIG["kimi"]["folder"] == ".kimi-code/"
         assert AGENT_CONFIG["kimi"]["commands_subdir"] == "skills"
         assert AGENT_CONFIG["kimi"]["requires_cli"] is True
 
     def test_kimi_in_extension_registrar(self):
-        """Extension command registrar should include kimi using .kimi/skills and SKILL.md."""
+        """Extension command registrar should include kimi using .kimi-code/skills and SKILL.md."""
         cfg = CommandRegistrar.AGENT_CONFIGS
 
         assert "kimi" in cfg
         kimi_cfg = cfg["kimi"]
-        assert kimi_cfg["dir"] == ".kimi/skills"
+        assert kimi_cfg["dir"] == ".kimi-code/skills"
         assert kimi_cfg["extension"] == "/SKILL.md"
 
     def test_agent_config_includes_kimi(self):