feat: add mnemonic generation to MCP and Pi

[oritwoen]

keys_generate_mnemonic gives MCP and Pi fresh BIP39 phrases without asking the model to invent entropy. It is for disposable wallets and tests only: a mnemonic in an agent transcript is already exposed.

[coldtea-pr-lens]

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🟢 +0 new · 🟠 ~3 changed · 🔴 -0 removed · 1 flow · 5 files · commit f95992e

Architecture

3 components touched across 6 lanes.

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Inside the changed components — 2 views

Component view — Tool Operations

Shared dispatcher and schema validation executing mnemonic generation against the BIP39 engine

Component view — Client Interfaces

MCP server and Pi agent extension surfaces exposing the 16th tool to AI assistants

Data flow

Generating a disposable BIP39 mnemonic

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Drill down

Client Interfaces — 2 components

🟡 CHANGED MCP Server

Exposes key, address, and mnemonic operations to AI assistants over stdio.

• src/mcp.ts:187-198

🟡 CHANGED Pi Extension

Registers coding agent tools for key generation, mnemonic recovery, and wallet derivation.

• packages/pi/extensions/keys.ts:191-210

Tool Operations — 1 component

🟡 CHANGED Tool Operations Dispatcher

Shared executors, schemas, and parameter validators backing both MCP and Pi tools.

• src/tool-operations.ts:448-469
• src/tool-parameters.ts:18-19
• src/tool-schemas.ts:4-15

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