tidy kiro-cli multi-install-safe declaration + add docs row and test

kiro-cli is declared multi_install_safe (it uses a fully isolated .kiro/
root, .kiro/prompts command dir, a stable '.' separator, and a dedicated
manifest — #3471). main ended up with the flag assigned twice in the class
body; this drops the bare duplicate and keeps a single declaration with the
comment explaining why it's safe.

also adds the missing kiro-cli row to the multi-install-safe table in
docs/reference/integrations.md, and a test asserting the flag is set (the
registry contract tests already enforce the actual path isolation against
every other safe integration).

Author: Quratulain-bilal

docs/reference/integrations.md

@@ -271,6 +271,7 @@ The currently declared multi-install safe integrations are:
 | `grok` | `.grok/skills` |
 | `junie` | `.junie/commands`, `.junie/AGENTS.md` |
 | `kilocode` | `.kilocode/workflows`, `.kilocode/rules/specify-rules.md` |
+| `kiro-cli` | `.kiro/prompts` |
 | `qodercli` | `.qoder/commands`, `QODER.md` |
 | `qwen` | `.qwen/commands`, `QWEN.md` |
 | `shai` | `.shai/commands`, `SHAI.md` |

src/specify_cli/integrations/kiro_cli/__init__.py

@@ -13,7 +13,6 @@
 
 class KiroCliIntegration(MarkdownIntegration):
     key = "kiro-cli"
-    multi_install_safe = True
     config = {
         "name": "Kiro CLI",
         "folder": ".kiro/",

tests/integrations/test_integration_kiro_cli.py

@@ -56,6 +56,16 @@ def test_registrar_config(self):
         assert i.registrar_config["format"] == "markdown"
         assert i.registrar_config["extension"] == ".md"
 
+    def test_declared_multi_install_safe(self):
+        """kiro-cli uses a fully isolated .kiro/ root, a stable "." separator,
+        and a dedicated manifest, so it must be declared multi-install safe —
+        otherwise co-installing it (e.g. alongside claude) leaves
+        `integration status` permanently in ERROR with no way to resolve it
+        (#3471). The registry contract tests enforce the actual path isolation
+        against every other safe integration."""
+        i = get_integration(self.KEY)
+        assert i.multi_install_safe is True
+
     def test_registrar_config_args_is_exact_prose_fallback(self):
         """Layer 1 — pin the exact fallback so wording drift requires a
         deliberate paired commit (production constant + test update)."""