# strata19.set_mode
URL: /documentation/reference/tools/set_mode



{/* GENERATED FILE — do not edit. Sources: src/mcp/facade/tool-projection-registry.ts (availability) + describe() in src/mcp/facade/facade-tools.ts (prose). Regenerate: pnpm exec tsx scripts/docs/site/generate-tool-reference.ts */}

## What it does [#what-it-does]

Set the audience mode for this bound project: `builder` (plain language, ids hidden) or `engineer` (full technical detail). Persisted in `.strata19/state.db`, shared with every mode-aware tool.

## When to use it [#when-to-use-it]

**Use when:** "keep it in plain language, no jargon" · "switch to builder mode" · "I'm an engineer, use full technical detail"

**Also use when:** the operator's technical level is evident from how they are asking

## When not to use it [#when-not-to-use-it]

you want the current mode without changing it — use `strata19.get_mode`

## Availability [#availability]

|           |                            |
| --------- | -------------------------- |
| Tier      | Expert                     |
| Lifecycle | Live                       |
| Taught by | `strata19-project-context` |