feat(skill): add git operation skills

robot/tool_git_builtins.robot

@@ -0,0 +1,39 @@
+*** Settings ***
+Documentation    Smoke tests for built-in git tools
+Resource         ${CURDIR}/common.resource
+Suite Setup      Setup Test Environment
+Suite Teardown   Cleanup Test Environment
+
+*** Variables ***
+${HELPER_SCRIPT}    robot/helper_tool_git_builtins.py
+
+*** Test Cases ***
+Git Status Tool
+    [Documentation]    Show working tree status using builtin/git-status
+    ${result}=    Run Process    ${PYTHON}    ${HELPER_SCRIPT}    status    cwd=${WORKSPACE}
+    Should Be Equal As Integers    ${result.rc}    0
+    Should Contain    ${result.stdout}    git-status-ok
+
+Git Diff Tool
+    [Documentation]    Show changes using builtin/git-diff
+    ${result}=    Run Process    ${PYTHON}    ${HELPER_SCRIPT}    diff    cwd=${WORKSPACE}
+    Should Be Equal As Integers    ${result.rc}    0
+    Should Contain    ${result.stdout}    git-diff-ok
+
+Git Log Tool
+    [Documentation]    Show commit log using builtin/git-log
+    ${result}=    Run Process    ${PYTHON}    ${HELPER_SCRIPT}    log    cwd=${WORKSPACE}
+    Should Be Equal As Integers    ${result.rc}    0
+    Should Contain    ${result.stdout}    git-log-ok
+
+Git Blame Tool
+    [Documentation]    Show file attribution using builtin/git-blame
+    ${result}=    Run Process    ${PYTHON}    ${HELPER_SCRIPT}    blame    cwd=${WORKSPACE}
+    Should Be Equal As Integers    ${result.rc}    0
+    Should Contain    ${result.stdout}    git-blame-ok
+
+Git Path Traversal Prevention
+    [Documentation]    Path traversal in repo_path should be blocked
+    ${result}=    Run Process    ${PYTHON}    ${HELPER_SCRIPT}    traversal    cwd=${WORKSPACE}
+    Should Be Equal As Integers    ${result.rc}    0
+    Should Contain    ${result.stdout}    traversal-ok