Preparing Policies branch to merge to main

[0xLeo-sqds]

Summary

General cleanup of the policies branch: removed temporary documentation files, rewrote README with comprehensive policy framework documentation, and fixed SDK serialization bugs.

Changes

Deleted Files (Temporary/AI Context Files)

• .mcp.json - MCP configuration (not needed in repo)
• CLAUDE.md - AI assistant context file
• EVENT_LOGGING_OVERVIEW.md - Temporary documentation
• POLICIES_OVERVIEW.md - Temporary documentation
• context.md - AI assistant context file
• summary.md - AI assistant summary file

README.md - Complete Rewrite

Comprehensive developer-focused documentation including:
• Grid Integration - Positioned as the easiest path for most developers
• Core Concepts - Settings struct, sub-accounts, permissions, time lock, stale transaction protection
• Execution Modes - Consensus-based and synchronous execution flows
• Policy Framework - All 4 policy types documented:
• Program Interaction Policy (with Smart Transactions explanation)
• Internal Fund Transfer Policy
• Spending Limit Policy
• Settings Change Policy
• Hooks - Pre/post execution hooks documentation
• Legacy Spending Limits - Backwards compatibility section
• Building, Testing, Verifying - Developer instructions
• Audits & Security - Links to audit reports

SDK Bug Fixes

fix-smallvec.js
• Removed SmartAccountTransactionMessage.ts from SmallVec list - This type uses Vec in Rust (4-byte length prefix), NOT SmallVec (1-byte prefix). The incorrect entry was causing transaction deserialization failures (RangeError: offset out of range).

CompiledHook.ts
• Fixed instructionData field - Changed from smallArray(beet.u8, beet.u8) to smallArray(beet.u16, beet.u8) to match Rust's SmallVec<u16, u8> which uses a 2-byte length prefix.

Test Fixes

tests/index.ts
• Enabled all test imports (previously some were commented out)

policyCreation.ts
• Changed ProgramInteraction to LegacyProgramInteraction - The test uses the old format without pubkeyTable, so it needs the legacy variant.

Other

• .yarnrc.yml - Removed yarnPath pointing to gitignored .yarn/releases/ directory