feat(gastown): inject quality gates into polecat prompt

[jrf0110]

Summary

• Adds gates: string[] parameter to buildPolecatSystemPrompt that injects the town's configured quality gates into a "Pre-Submission Gates" section of the polecat system prompt
• Polecats now self-validate by running configured gate commands (lint, test, build) before calling gt_done, catching failures in-session instead of wasting a refinery round-trip
• Gates are read from townConfig.refinery.gates at dispatch time (same source the refinery uses); when no gates are configured, the section is omitted
• Prompt instructs polecats to fix gate failures and escalate via gt_escalate if stuck after repeated attempts

Closes #958

Verification

• Code review of diff against fork branch — all patches applied cleanly to origin/main
• Polecat system prompt test file updated with gates parameter coverage

Visual Changes

N/A

Reviewer Notes

• This is a small, focused change (3 files, ~40 lines) — low risk
• The gate commands are injected verbatim from townConfig.refinery.gates — no sanitization is applied since these are admin-configured values
• The escalation fallback ("call gt_escalate then gt_done anyway") matches the issue spec; the refinery makes the final call on whether to merge

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (3 files)

• cloudflare-gastown/src/dos/town/container-dispatch.ts
• cloudflare-gastown/src/prompts/polecat-system.prompt.ts
• cloudflare-gastown/src/prompts/polecat-system.prompt.test.ts

---

_{Reviewed by gpt-5.4-20260305 · 277,557 tokens}