docs: advisor tool — workhorse mode (sonnet executor + opus/fable advisor)#126
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…he settings schema Claude Code natively supports the API advisor tool (beta) — a cheaper executor session consults a stronger advisor model mid-turn, server-side, with the full transcript. It works on Max subscription billing, which makes it a third routing lever alongside the Opus/Sonnet/Codex split. Recommended as opt-in "workhorse mode" (/model sonnet + /advisor opus, or fable while access lasts) rather than a composed default: our standing model is opus[1m] where an advisor is marginal, and a Fable session only accepts a Fable advisor.
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What this does
Documents Claude Code's native advisor tool for the team and makes
advisorModela known settings key. The advisor lets a cheap Sonnet session consult Opus or Fable mid-turn with the full transcript — on Max subscription billing — so daily-driver sessions get near-top-tier planning while burning mostly Sonnet quota, saving scarce Opus hours for work that needs a top-tier executor.Summary
docs/agent-models.md: new "Advisor" section — config surface (/advisor,advisorModel,--advisor,CLAUDE_CODE_DISABLE_ADVISOR_TOOL), pairing table (sonnet executor is the sweet spot; a Fable session only accepts a Fable advisor), recommended opt-in "workhorse mode", and interactions with subagent inheritance, Codex routing, and Fable's encrypted adviceMANUAL.md: user-facing note in Advanced, next to the model/platform sections (advisor is Anthropic-API-only, like the Bedrock/Vertex caveats above it)src/schemas/settings.ts+ regeneratedschemas/settings.schema.json: addadvisorModelso a persisted/advisorchoice validates like every other known keyDeliberately not a composed default: standing model is
opus[1m], where an advisor is marginal.Test Plan
bun run typecheckcleanbun test— 777 passbun run lint— no new findings (4 pre-existing warnings untouched)bun run schemas:emitregenerated and committed