461c493972
Vendors the ast-grep skill from oh-my-openagent's shared-skills bundle (upstream code-yeongyu/ast-grep-skill @ 3148c69, MIT) into optional-skills/software-development/ast-grep with Hermes conventions: - SKILL.md rewritten with Hermes frontmatter (platforms, tags, category) and Hermes tool routing (search_files instead of raw rg, terminal for sg invocations, patch-vs-ast-grep division of labor) - scripts/ast_grep_helper.py: fixed argparse so trailing paths after an optional flag parse (parse_known_args + fold extras into paths); upstream errored 'unrecognized arguments: .' on the documented 'search PATTERN --lang js .' form - 7 reference docs, install.sh/install.ps1 (pinned-release GitHub fallback), smoke tests carried over verbatim E2E validated: install (github method, ast-grep 0.45.0), doctor, search, validate (regex rejection), replace dry-run + apply two-pass, scan with YAML rule, tests/smoke.sh 15/15 pass.