qsys-plugins

MUST use whenever a file contains a "## Changelog" section or changelog work is requested. This is mandatory for all changelog work. Covers semantic versioning, entry format, the accumulate-in-memory-until-push workflow, retention/dedup rules, and which files are excluded (pure rule/prompt files defining behavior for other files, with no logic of their own).

MUST use whenever reading, writing, copying, moving, or deleting files. Do NOT use native open(), shutil, or shell commands — file-operations is mandatory for all file operations. Provides atomic writes, checksums, safe copy, secure delete, gzip streaming, advisory locking, in-place zero-copy edits, and write guards (allowlist, blocklist, protected-root, destructive-op confirmation).