hydralisted
Install: claude install-skill opencue/claude-code-skills
<!-- v2.0: per ADR docs/adr/0001-execution-substrate.md (Option C, accepted 2026-05-23),
interactive /hydra runs in THIS harness (Agent tool + codex-companion), so SKILL.md is
the living product surface. Prompt-level v2.0 wins land here directly (Echo advisor;
chairman grounding + suspicious-verdict gate). The Python core in hydra/ is scoped to
the bench (deterministic citation-grounding + reproducible scoring) -- it does NOT
replace this runtime. Design context: docs/specs/2026-04-17-hydra-2.0-core-design-v2.md. -->
# Hydra
Four advisors analyze your code from different angles by default (standard mode) --
including Echo, which reviews AI-assisted-development failure modes. Escalate to deep
mode for the full council: six advisors, three cross-examining reviewers, and a
chairman synthesizing the final verdict.
Standard mode runs 4 advisors + chairman on Opus (~$0.35-0.65). Deep mode adds 2 more
advisors (including 2 Codex), 3 reviewers, and cross-model diversity (~$1.50-2.50).
Reference files in `references/` define all prompts and protocols -- read them at the
relevant step.
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## Modes
| Mode | CLI | Advisors | Reviewers | Chairman | Total | Est. Cost |
|------|-----|----------|-----------|----------|-------|-----------|
| **standard** | *(default)* | 4 (Cassandra + Mies+ + Sentinel + Echo) | 0 | 1 Opus | 5 | ~$0.35-0.65 |
| **deep** | `--mode deep` | 6 (4 Opus + 2 Codex) | 3 (all Opus) | 1 Opus | 10 | ~$1.50-2.50 |
Modifiers (combinable):