# Session Summary – February 23, 2026
## Mod System Now Operational

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

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## 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

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## 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

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## 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

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## 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