[Upstream #150] Bug: Hardcoded 'reddit' platform default causes silent data loss for Twitter-only simulations

[ivanzud]

Upstream Issue Mirror

• Upstream issue: Bug: Hardcoded 'reddit' platform default causes silent data loss for Twitter-only simulations 666ghj/MiroFish#150
• Upstream repository: 666ghj/MiroFish
• State: open
• Author: karesansui-u
• Labels: none
• Last updated: 2026-03-11T17:49:29Z

Summary

Summary When a simulation is created with Twitter-only configuration (enable_reddit=false), all data retrieval APIs silently return empty results because they default to looking up Reddit data. No error is raised — the user sees an empty UI with no indication of what went wrong. ## Root Cause The platform parameter defaults to 'reddit' in 11+ locations across the codebase. When a Twitter-o…

Local Coverage

• Status: covered
• Summary: Simulation data retrieval now resolves the active platform from SimulationState instead of silently defaulting to Reddit when Twitter/X is the only enabled platform, and SimulationManager.get_profiles() now reads Twitter profile CSV files correctly as well. That prevents empty profile/post responses in Twitter-only simulations even when older callers still pass the historical reddit default.
• Local refs: .beads/issues.jsonl, backend/app/services/simulation_manager.py, backend/app/api/simulation.py, backend/tests/test_simulation_service_i18n.py, backend/tests/test_simulation_api_i18n.py, https://github.com/ivanzud/MiroFish/issues/91
• Notes: Mirrored into fork issue [Upstream #150] Bug: Hardcoded 'reddit' platform default causes silent data loss for Twitter-only simulations #91 on March 11, 2026. The fix keeps legacy callers working by falling back to the sole enabled platform instead of assuming Reddit.