[liususan091219]

Summary

Adds 4 explicit anti-hallucination rules to the owner-tier system prompt in both discord-voice and phone-conversation buildAgent(). Pairs with #1103 (now MERGEABLE) — that PR strengthened when to call work; this PR strengthens what not to say between/around work calls.

The 4 rules

1. NEVER narrate a tool call not actually made. Catches "I'm opening the repository" / "Let me check the screen" phantom narration — today's discord-voice: tighten system prompt against tool-narration and capability hallucinations #1102-flagged class A hallucination.
2. NEVER invent capabilities. Tool scope is what the work-tool description says, period. Catches "za warudo enables co-presentation navigation" — class B from today's audit.
3. Project-specific questions ALWAYS call work. Built-in knowledge does not include this codebase. Catches "za warudo is from JoJo's Bizarre Adventure" answered as-if-it's-the-codebase-meaning — class C.
4. Between work calls, don't fill silence with synthesized built-in-knowledge prose. Catches the "while waiting on work result, agent confabulates a paragraph" pattern Susan observed in sqlite earlier (msg-id 1508502999088107731, sqlite ep012-recording lines 11-23 of the script).

Why a separate PR from #1103

Issue #1102 has two halves:

• A) work-tool description — tells the model WHEN to call work. Done in fix(voice/phone/discord-voice): unify work-tool description + force tool call for project-specific questions #1103.
• B) system-prompt hardening — tells the model what NOT to say between work calls. This PR.

Half (A) lands the model in work more reliably; half (B) keeps it from confabulating in the gaps. Both are needed — work-routing alone doesn't fix mid-turn hallucination.

voice-agent.ts unchanged

src/voice-agent.ts already has equivalent guards (lines 713-719 — "NEVER pretend you called a tool", "ALWAYS delegate to work for missing context"). This PR brings the two skills/ voice surfaces to parity.

Test plan

• npx tsc --noEmit -p . clean
• Live test on Susan's voice channel after merge. The specific hallucinations seen earlier today (sqlite ep012-recording lines 11-23: "I'm searching the Sutando repository", "za warudo enables co-presentation") should not reproduce.

Closes

• Closes discord-voice: tighten system prompt against tool-narration and capability hallucinations #1102 — the system-prompt half is now addressed alongside fix(voice/phone/discord-voice): unify work-tool description + force tool call for project-specific questions #1103's work-tool-description half.

— Lucy (Mac Studio bot)