feat: domain/subdomain/tag bulk ops + enriched INDEX

- domains, subdomains, tags : frontmatter distribution counts
- enable-domain / disable-domain        : bulk by 'domain:' (eg. cybersecurity)
- enable-subdomain / disable-subdomain  : bulk by 'subdomain:' (eg. malware-analysis)
- enable-tag / disable-tag [--all]      : multi-tag union (default) or intersection
- INDEX.json now exposes domain, subdomain, tags[]
- INDEX.md columns expanded; top-domains/subdomains/tags summaries
- PyYAML-first frontmatter parser (regex fallback) — parses 1027/1032 descriptions
  and 758 skills' tags correctly (previous regex parser missed almost everything)
- enable/disable now incrementally update INDEX.json status so bulk ops stay
  consistent without a full reindex
- jq --args bug fix in tag commands ('--' was leaking into ARGS.positional)

README.md

@@ -29,19 +29,53 @@ Override via env:
 
 ## Commands
 
+### Inspection
+
 ```
 opc-skills status                     # counts of active vs parked
 opc-skills list {active|parked|all}   # skill folder names
-opc-skills categories                 # prefix-based category counts
-opc-skills enable <folder>            # copy parked → active
+opc-skills categories                 # verb-prefix counts (performing, detecting, ...)
+opc-skills domains                    # frontmatter `domain:` distribution
+opc-skills subdomains                 # frontmatter `subdomain:` distribution
+opc-skills tags                       # frontmatter `tags:` distribution
+```
+
+### Single-skill operations
+
+```
+opc-skills enable  <folder>           # copy parked → active
 opc-skills disable <folder>           # remove from active (parked preserved)
-opc-skills enable-category <prefix>   # fzf multi-pick within a prefix
+opc-skills disable-all [-y|--yes]     # disable every active skill
+```
+
+### Bulk by axis
+
+```
+opc-skills enable-category   <prefix>      # fzf multi-pick within a verb-prefix
+opc-skills disable-category  <prefix>
+opc-skills enable-domain     <domain>      # bulk by frontmatter domain (eg. cybersecurity)
+opc-skills disable-domain    <domain>
+opc-skills enable-subdomain  <subdomain>   # bulk by subdomain (eg. malware-analysis)
+opc-skills disable-subdomain <subdomain>
+opc-skills enable-tag  [--all] <tag>...    # bulk by tags (default: any; --all: intersection)
+opc-skills disable-tag [--all] <tag>...
+```
+
+### Interactive / search
+
+```
 opc-skills pick                       # fzf: category → multi-select → enable
+opc-skills disable-pick               # fzf: ACTIVE category → multi-select → disable
 opc-skills search [query]             # fzf fuzzy over name+description
+opc-skills disable-search [query]     # fzf over ACTIVE only
 opc-skills reindex                    # rebuild INDEX.json / INDEX.md
 ```
 
-`fzf` is required for the interactive commands.
+`fzf` is required for the interactive commands; `jq` for the bulk-by-axis commands; `python3` (with optional `PyYAML`) for `reindex`.
+
+### INDEX schema
+
+`reindex` parses each `SKILL.md` frontmatter and emits records with: `folder`, `name`, `description`, `domain`, `subdomain`, `tags[]`, `status`. `enable` / `disable` perform an incremental status update on `INDEX.json` so `enable-domain` / `disable-tag` etc. stay accurate without a full reindex.
 
 ## Shared reference files