knowledge-base/Session_Summaries/2026-02-23_Mod-System-Operational.md

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Session Summary February 23, 2026

Mod System Now Operational

Full mod lifecycle implemented and confirmed end-to-end.


What Shipped

API

  • Modrinth search integrated (GET /api/game/mods/search)
  • Full install/list/enable/disable/delete routes live behind auth + ownership
  • Agent host allowlist expanded to include cdn.modrinth.com
  • Filename validation updated to allow + (required for Modrinth filenames like sodium-neoforge-0.6.13+mc1.21.4.jar)
  • Engine metadata bug fixed: engineType="neoforge", engineVersion="1.21.4" (was "minecraft" / "neoforge-1.21.4")
  • API → Agent payload contract corrected (field names and source field)

Frontend

  • Mod search drawer implemented
  • Installed mods panel implemented
  • Enable/disable/delete wired
  • Toast notifications added

System State

  • Full lifecycle via API:
  • Frontend search + install:
  • Enable/disable/delete:
  • Installed flag displayed:
  • Soft delete to /mods-removed:
  • No retention automation: intentional
  • No install queue: intentional
  • Filesystem authoritative: confirmed

Known Tradeoffs Locked In

  • No deterministic Modrinth project ID persistence (installed detection is heuristic)
  • No DB tracking of mod state
  • Soft delete is permanent until file browser enables manual restore

Pending at Session End

  • Response corruption investigation (one early curl output appeared malformed)
  • API error mapping: "mod already exists"409 (currently 502)
  • Portal UI wiring for install flow