Port from code-yeongyu/oh-my-openagent: ast-grep structural search/codemod optional skill
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.
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