llm-council — external-tools review layer

Overview

Wraps pr-council-review (unchanged) and adds a layer of external CLI coding agents (codex, plus Antigravity — the agy harness) as additional independent reviewers, then folds their verdicts into the same synthesis. Internal Claude subagents are independent per-dimension but share one model family's blind spots — a phrasing choice, a Windows-vs-POSIX nuance, or a syntax error that reads fine to one Claude reviewer reads fine to all of them. A different model family catches a different error distribution. Confirmed live: on one review, external tools caught 6 real, distinct issues (a wording-accuracy bug, a wrong test count, a Windows-only test-triviality nuance, a test-isolation gap, a missing test, a malformed markdown fence) that 12 internal Claude-subagent dispatches (6 dimensions × 2 rounds) had all missed.

When to Use

• Any pr-council-review run (PR# mode or branch mode) where the artifact is high-stakes enough to want a second, differently-biased opinion before calling it GREEN.
• Not needed for a quick spot-check or draft iteration — use /review (single-agent) for that; pr-council-review alone for a normal-stakes PR.

Quick Reference — Tiers