Move the code and terraform audits into the reviews plugin

Copy the standalone code-review and terraform-review skills into plugins/reviews as audit-code and audit-terraform. The rename separates the automated, linter-driven audits from the guided review-pr walkthrough that already lived here. Resolve bundled script paths through ${SKILL_DIR}, exported in a new step 0. CLAUDE_PLUGIN_ROOT is not set in the Bash tool environment, so the obvious substitution would have expanded to nothing and broken every collection script invocation. Replace the PLAN and DESIGN docs with READMEs written from the current SKILL.md and scripts. The old docs had drifted badly: they named semgrep where the code calls opengrep, scoped five review agents where there are now eight, and predated Lua, PowerShell, and GitHub Actions support. Add CONSISTENCY_NORMS to the audit-terraform agent inputs. The collection script writes consistency_norms.json and the agent prompt declares it, but SKILL.md never listed it, leaving the variable unsubstituted. Drop the --ingest-verdicts instruction from both skills. review_stats.py parses no arguments, so the ref-mode verdict template it told users to feed back could never be read. Point audit-terraform's smoke test at README.md and resolve its fixture paths relative to the test file rather than an absolute home directory. Tests: 197 passing (audit-code), 106 passing (audit-terraform).
2026-07-21 11:11:05 -05:00
parent 600c1fef86
commit f5934181ec
179 changed files with 20779 additions and 3 deletions
@@ -0,0 +1,97 @@
+"""Git diff scanning: changed files, dirs, and per-file added-line ranges."""
+from __future__ import annotations
+
+import re
+import subprocess
+from pathlib import PurePosixPath
+
+
+_HCL_SUFFIXES = (".tf", ".tf.json", ".hcl")
+_HUNK_RE = re.compile(r"^@@ -\d+(?:,\d+)? \+(\d+)(?:,(\d+))? @@")
+
+
+def _run_git_diff(repo: str, base: str, head: str) -> str:
+    result = subprocess.run(
+        [
+            "git", "-C", repo,
+            "-c", "diff.noprefix=false",
+            "-c", "color.ui=never",
+            "diff", "--no-ext-diff", "--unified=0", f"{base}...{head}"
+        ],
+        capture_output=True, text=True, check=False,
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"git diff failed: {result.stderr.strip()}")
+    return result.stdout
+
+
+def _iter_file_blocks(diff_text: str):
+    """Yield (path, block_text) for each file section in a unified diff."""
+    current_path: str | None = None
+    buf: list[str] = []
+    for line in diff_text.splitlines():
+        if line.startswith("diff --git "):
+            if current_path is not None:
+                yield current_path, "\n".join(buf)
+            current_path = None
+            buf = []
+        elif line.startswith("+++ b/"):
+            current_path = line[len("+++ b/"):]
+        if current_path is not None:
+            buf.append(line)
+    if current_path is not None:
+        yield current_path, "\n".join(buf)
+
+
+def changed_files(repo: str, base: str, head: str) -> list[str]:
+    out: list[str] = []
+    for path, _ in _iter_file_blocks(_run_git_diff(repo, base, head)):
+        if path.endswith(_HCL_SUFFIXES):
+            out.append(path)
+    return out
+
+
+def is_terragrunt_file(path: str) -> bool:
+    return PurePosixPath(path).name == "terragrunt.hcl"
+
+
+def changed_dirs(repo: str, base: str, head: str) -> set[str]:
+    return {str(PurePosixPath(p).parent) for p in changed_files(repo, base, head)}
+
+
+def changed_line_ranges(
+    repo: str, base: str, head: str, path: str,
+) -> list[tuple[int, int]]:
+    """Return inclusive (start, end) line ranges of *added* lines in `path`."""
+    ranges: list[tuple[int, int]] = []
+    for fpath, block in _iter_file_blocks(_run_git_diff(repo, base, head)):
+        if fpath != path:
+            continue
+        cur: int | None = None
+        run_start: int | None = None
+        run_end: int | None = None
+        for line in block.splitlines():
+            m = _HUNK_RE.match(line)
+            if m:
+                if run_start is not None:
+                    ranges.append((run_start, run_end))  # type: ignore[arg-type]
+                    run_start = run_end = None
+                cur = int(m.group(1))
+                continue
+            if cur is None:
+                continue
+            if line.startswith("+") and not line.startswith("+++"):
+                if run_start is None:
+                    run_start = cur
+                run_end = cur
+                cur += 1
+            elif line.startswith("-") and not line.startswith("---"):
+                continue
+            else:
+                if run_start is not None:
+                    ranges.append((run_start, run_end))  # type: ignore[arg-type]
+                    run_start = run_end = None
+                cur += 1
+        if run_start is not None:
+            ranges.append((run_start, run_end))  # type: ignore[arg-type]
+    return ranges