mpi-brief-rule

mpi-brief-rule Skill

Extract and return the ## Sub-Agent Briefing section from configured project rules, or from a configured bundle of rules. Used as a D4 (Agent → Sub-Agent) dispatch mechanism so sub-agents receive rule briefings without manual copy-paste.

Invocation

Codex: $mpi-brief-rule <rule_name>
Claude Code: /mpi-kanban:mpi-brief-rule <rule_name>

<rule_name> is one of the names listed in .claude/mpi-kanban.local.md under the rules: frontmatter list, or a name under optional bundles:. The list is project-specific — the plugin ships no hardcoded rules.

Process

All recipes (loadConfig, resolveRulePath, resolveBundle, getRuleList, getBundleList, loadCriticalSnapshot, bootstrap notice) live in ${CLAUDE_PLUGIN_ROOT}/lib/config-ops.md. Read it once when you actually need the first recipe — not before. In Codex, resolve the same file relative to this plugin root.

1. Load config. Call loadConfig().

   • If null (file missing) → emit the bootstrap notice from lib/config-ops.md ("No mpi-kanban config found..."), and stop. Do NOT auto-create the config.

2. Resolve the rule or bundle.

   • Use getBundleList(config). If <rule_name> matches a configured bundle, call resolveBundle(config, rule_name), resolve each rule in order, and return all briefings with headings.
   • Otherwise call resolveRulePath(config, rule_name).
   • If null (rule not in config) → list the available rule names from getRuleList(config) and available bundle names, then stop. Example output:

     Rule "<rule_name>" is not configured.
     Available rules: components, events, state
     Available bundles: frontend-worker, backend-worker
     

3. Read the rule file. Read the resolved path.

   • If the file is missing on disk (config points at a non-existent file) → report the broken path and stop.

4. Extract the briefing. Find the ## Sub-Agent Briefing heading. Return everything from that heading up to (but not including) the next ## heading at the same level (or end of file). Return verbatim — no modification, no summarization.

5. Fallback to critical snapshot. If the rule file has no ## Sub-Agent Briefing section, call loadCriticalSnapshot(config) and return that instead. Prefix the output with one line:

   Rule "<rule_name>" has no Sub-Agent Briefing — using critical snapshot from <critical_snapshot_file>:
   

   • If the critical snapshot also can't be resolved, report both failures clearly and stop.

Hard rules

• Read-only and non-destructive. Never edit a rule file.
• Briefing text is returned verbatim — no paraphrasing, no summarization.
• Rule and bundle lists are config-driven. The plugin must NOT carry a hardcoded list of rule names.
• Board-independent: do NOT auto-create kanban.md when this skill runs.

Notes

• This skill is invoked BY a main agent when dispatching sub-agents — and is user-invocable for testing via $mpi-brief-rule in Codex or /mpi-kanban:mpi-brief-rule in Claude Code.
• Briefing sections may contain markdown formatting; pass it through unchanged.