Fan out one question to GPT, Gemini, Grok, and any configured OpenRouter models in parallel for independent second opinions, then return all results (advisory, no cross-contamination). Pass expert to apply a persona to every delegate. Calls external LLM providers (each needs its key/CLI; provider rate limits apply); returns a text-wrapped JSON envelope { results[], omitted[] } and persists a session record only when sessions.persist is enabled (default off).

Run the FULL multi-round consensus convergence loop server-side with a provider arbiter (blind pass + peer fan-out -> adjudicate -> revise) and return the converged verdict. Default depth is consensus.maxRounds (config, default 5); pass maxRounds to override. Pass synthesizeAlways:true for a SINGLE arbiter synthesis pass instead of the loop (best for open questions, not plan convergence): it returns a free-text synthesis and maxRounds is ignored. Configure the arbiter via consensus.arbiter - a concrete provider/openrouter alias runs server-side; host mode returns the opinions for YOU to synthesize. Advisory; pass expert to apply a persona. Calls external providers (keys/CLI; rate limits apply); returns a text-wrapped JSON envelope (split verdict/synthesis, loop fields nullable) and persists a session record only when sessions.persist is enabled (default off). NOTE (Claude Code): use the /consensus slash command for the transcript-visible host-arbiter loop (it drives consensus-step); this tool is the provider-arbiter path for any host.

Client-driven consensus loop where YOU (the host model) are the arbiter, one action per call: init (returns sessionId + blind prompt) -> record_blind (your pre-commit verdict) -> dispatch_peers (server fans out to the providers) -> submit_adjudication (your verdict + per-issue accept/dismiss/defer) -> submit_revision (your revised plan), looping until converged or consensus.maxRounds rounds (default 5). Only the dispatch_peers action calls external providers; the others are local transitions on the ephemeral per-session loop store (keyed by sessionId, lost on server restart). Each call returns a text-wrapped JSON envelope with the next status/round (plus blindPrompt, opinions[], or finalReport by action). Advisory to the outside world, but mutates server loop state on every call.

Return the names of the providers ask-all WOULD dispatch for the current config + expert (enabled built-ins + eligible OpenRouter aliases, fanout cap applied), WITHOUT calling them. Use this to discover the panel, then issue one ask-one call per provider in parallel for visible per-provider progress. Local and read-only (no provider calls); returns a text-wrapped JSON envelope { providers[], omitted[] }.

Second opinion from ONE named provider in the active panel (e.g. codex, gemini, grok, openrouter:<alias> - get the names from panel). Issue N in parallel (one per panel name) so each renders independently as it lands. Calls one external LLM provider (needs its key/CLI; rate limits apply); returns a text-wrapped JSON envelope { result }, or { error, panel } when the name is not in the panel. Advisory, single-shot.

Analyze recent runs from the opt-in debug log (latency/tokens/reasoning-effort per model) plus the session store (verdict agreement rate), and return advisory tuning suggestions (disable a slow/redundant model in ask-all, lower an OpenRouter model's reasoning, adjust maxFanout). Two lenses reported side by side - timing and agreement are NOT joined (no shared run id). Requires debug.enabled for the timing lens. Local and read-only (no provider calls, writes nothing); returns a text-wrapped JSON envelope with the two lenses + suggestions. The /deliberation:analyze slash command renders this for humans.

Single-provider second opinion via codex (advisory, single-shot). Pass expert to apply one of the expert personas. Calls the external codex provider (via the Codex CLI; rate limits apply) and returns a text-wrapped JSON envelope { result }.

Single-provider second opinion via gemini (advisory, single-shot). Pass expert to apply one of the expert personas. Calls the external gemini provider (via the Gemini CLI; rate limits apply) and returns a text-wrapped JSON envelope { result }.

Single-provider second opinion via grok (advisory, single-shot). Pass expert to apply one of the expert personas. Calls the external grok provider (needs XAI_API_KEY; rate limits apply) and returns a text-wrapped JSON envelope { result }.

Single-provider second opinion via openrouter (advisory, single-shot). Pass expert to apply one of the expert personas. Calls the external openrouter provider (needs the OpenRouter API key env; rate limits apply) and returns a text-wrapped JSON envelope { result }.

Software architect for system design, tradeoff analysis, and complex decisions. Use for architecture, API/schema design, multi-service interactions, or when a fix has failed twice and needs a fresh perspective. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Work-plan reviewer that verifies a plan is executable before anyone builds. Use to validate an implementation plan for clarity, completeness, and gaps before starting significant work. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Pre-planning consultant that catches ambiguities, hidden requirements, and pitfalls before planning begins. Use when a request is vague or could be interpreted multiple ways. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Senior engineer doing code review for bugs, security holes, and maintainability - not style nitpicks. Use to review a diff or file before merging. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Security engineer for threat modeling and vulnerability assessment. Use for auth/authorization changes, untrusted input handling, new endpoints, or a focused security audit. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Research specialist for external libraries, frameworks, APIs, and open-source code. Use for 'how do I use X', best-practice, or 'why does this dependency behave this way' questions, with evidence and honest unverified flags. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Debugging specialist that produces ranked root-cause hypotheses and the smallest safe fix from a bug report, logs, and code - or says honestly that the evidence shows no bug. Use for crashes, failing tests, or wrong output. Fans out to the configured provider panel with this persona (advisory; each provider needs its key/CLI, rate limits apply) and returns a text-wrapped JSON envelope { results[] }.

Fetch a persisted consensus/ask-all session record by id (opinions, verdict, arbiter, annotations). Requires sessions.persist; local and read-only (no provider calls). Returns a text-wrapped JSON envelope { session }, or { error } when persistence is off or the id is unknown.

Re-run a persisted session's ORIGINAL question with the CURRENT providers/config, linking the new run to its source by parentId. Requires sessions.persist; re-runs through the original tool path (which dispatches external providers) and persists a linked child record on success. Returns a text-wrapped JSON envelope (the re-run payload + parentId), or { error } when persistence is off or the id is unknown.

Append a freeform note to a persisted session's audit trail - an additive local write, no provider calls. Requires sessions.persist. Returns a text-wrapped JSON envelope { session } (the updated record), or { error } when persistence is off or the id is unknown.