felt/.planning/phases/01-tournament-engine/01-07-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
01-tournament-engine	07	api, database	player fts5 qrcode csv-import ranking bounty pko undo	phase provides 01-tournament-engine audit trail + undo engine (Plan C), financial engine (Plan F), seating engine (Plan H), schema with FTS5 (Plan B)	PlayerService with CRUD, FTS5 typeahead search, merge, CSV import QR code generation per player (felt://player/{uuid}) Tournament player operations: register, bust, undo bust RankingEngine deriving positions from bust-out order Player API routes for venue-level and tournament-scoped operations Buy-in flow: register + financial + auto-seat Bust flow: hitman + bounty + rank + balance check CSV export safety: formula injection neutralization	09-tournament-lifecycle 11-tournament-ui 14-integration	added patterns skip2/go-qrcode derived-rankings csv-formula-injection-safety fts5-prefix-matching	created modified internal/player/player.go internal/player/ranking.go internal/player/qrcode.go internal/player/export.go internal/server/routes/players.go internal/player/ranking_test.go internal/player/player_test.go go.mod go.sum	Rankings derived from bust_out_at timestamps, never stored independently (Pitfall 6) RecalculateAllRankings rebuilds all bust_out_order values from timestamps for undo consistency FTS5 query terms wrapped in quotes with * suffix for prefix matching CSV formula injection neutralized with tab prefix on =, +, -, @ characters Buy-in flow auto-registers player if not yet in tournament QR code URL format: felt://player/{uuid} for future PWA self-check-in	Derived rankings: always compute from bust-out list, never store CSV export safety: SanitizeCSVField for any user data in CSV output Player API pattern: venue-level CRUD + tournament-scoped actions	PLYR-02 PLYR-03 PLYR-04 PLYR-05 PLYR-06 PLYR-07	7min	2026-03-01

Plan 07: Player Management Summary

Player CRUD with FTS5 typeahead, CSV import, QR codes, bust/undo flows with derived rankings from bust-out order

Performance

• Duration: 7 min
• Started: 2026-03-01T03:27:50Z
• Completed: 2026-03-01T03:35:13Z
• Tasks: 2
• Files modified: 9

Accomplishments

• Full player service with CRUD, FTS5 prefix-matching search, merge, CSV import with safety limits
• QR code generation per player using skip2/go-qrcode (felt://player/{uuid})
• Tournament player operations: register, bust (with PKO bounty), undo bust with re-ranking
• RankingEngine that derives all positions from ordered bust-out list (never stored)
• Complete player API routes: venue-level CRUD + tournament-scoped actions + rankings
• CSV export formula injection neutralization (tab-prefix on =, +, -, @)
• 12 passing tests covering ranking derivation, undo re-ranking, re-entry, deals, concurrency

Task Commits

Each task was committed atomically:

1. Task G1: Player CRUD, search, merge, import, QR codes - 9373628 (feat)
2. Task G2: Ranking engine and player API routes - 8b4b131 (feat)

Files Created/Modified

• internal/player/player.go - PlayerService with CRUD, search, merge, import, bust, undo
• internal/player/ranking.go - RankingEngine deriving positions from bust-out order
• internal/player/qrcode.go - QR code generation using skip2/go-qrcode
• internal/player/export.go - CSV export safety: formula injection neutralization
• internal/server/routes/players.go - PlayerHandler with venue-level and tournament-scoped routes
• internal/player/ranking_test.go - 7 ranking tests (bust order, undo, re-entry, deals, concurrency)
• internal/player/player_test.go - 5 tests (CSV safety, import limits, UUID)
• go.mod - Added skip2/go-qrcode dependency
• go.sum - Updated checksums

Decisions Made

• Rankings derived from bust_out_at timestamps via RecalculateAllRankings (not stored independently per Pitfall 6)
• FTS5 queries use quoted terms with * suffix for prefix matching
• CSV formula injection neutralized with tab prefix on =, +, -, @ characters
• Buy-in flow auto-registers player in tournament_players if not already present
• QR code URL format: felt://player/{uuid} for future PWA self-check-in

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Installed skip2/go-qrcode dependency

• Found during: Task G1 (QR code generation)
• Issue: No QR code library in go.mod
• Fix: Ran go get github.com/skip2/go-qrcode
• Files modified: go.mod, go.sum
• Verification: QR code generation compiles and encodes valid PNG
• Committed in: 9373628 (Task G1 commit)

2. [Rule 3 - Blocking] Created RankingEngine in Task G1 (planned for G2)

• Found during: Task G1 (UndoBust implementation)
• Issue: UndoBust calls RecalculateAllRankings which requires the RankingEngine
• Fix: Implemented RankingEngine in ranking.go as part of Task G1
• Files modified: internal/player/ranking.go
• Verification: Package compiles, tests pass
• Committed in: 9373628 (Task G1 commit)

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Total deviations: 2 auto-fixed (2 blocking) Impact on plan: Both auto-fixes necessary for compilation and correctness. No scope creep.

Issues Encountered

None

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Player management API is complete and ready for tournament lifecycle integration (Plan I)
• Ranking engine provides derived rankings for the clock/tournament UI
• Buy-in and bust flows integrate with financial engine and seating engine
• CSV import and merge provide player database management for TDs

Self-Check: PASSED

All 7 created files verified on disk. Both task commits (9373628, 8b4b131) verified in git log.

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Phase: 01-tournament-engine Completed: 2026-03-01