Remove subagent/Task tool instructions from buildPrompt

[xliry]

Problem

The SUBAGENTS section in buildPrompt encourages Claude to spawn Explore subagents. lota-1 spawns subagents that re-read the ENTIRE codebase (25+ file reads) on tasks where it already knows the workspace. This wastes 5-10 turns and significant context window per task.

What to do

In src/daemon.ts, buildPrompt() function:

1. Find and remove the SUBAGENTS section (around lines 686-695)
2. Add a simple rule instead: "Do NOT use the Agent tool or Task tool. Use Grep and Read directly."
3. Also consider adding Agent/Task to the denied permissions in settings.json (same approach as TodoWrite removal)

Acceptance

• No subagent instructions in the prompt
• Agent uses Grep/Read directly instead of spawning subagents
• Saves 5-10 turns per complex task
• Build passes: npm run build

[xliry]

Plan

• Remove the SUBAGENTS section (lines 684-694) from buildPrompt() in src/daemon.ts
• Add a rule in PERFORMANCE RULES: "Do NOT use the Agent tool or Task tool. Use Grep and Read directly."
• Add Agent to denied tools list alongside TodoWrite in runClaude() (Task is already in allow, but denying it takes precedence)
• Run npm run build and commit

[xliry]

Completion Report

Removed SUBAGENTS section from buildPrompt() and added Agent to denied tools.

• Replaced 11-line SUBAGENTS block with single rule: 'Do NOT use the Agent tool or Task tool. Use Grep and Read directly.'
• Added 'Agent' to deniedTools alongside 'TodoWrite' in runClaude()
• Build passes: npm run build
• PR: feat: remove subagent instructions from buildPrompt (#162) lota#3

Modified: src/daemon.ts