---
phase: 02-exness-daily-tick-cache-seeder-service-with-registry-integration
plan: 01
subsystem: config
tags: [exness, forex, symbol-registry, pydantic-settings, toml]

# Dependency graph
requires: []
provides:
  - "10 Exness forex symbols in unified symbol registry (symbols.toml)"
  - "ExnessSeederConfig pydantic-settings class with env var override"
affects: [02-02, 02-03]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Exness forex entries follow same symbols.toml schema as Binance crypto entries"
    - "ExnessSeederConfig follows SeederConfig lazy-import pattern in config/__init__.py"

key-files:
  created:
    - python/opendeviationbar/config/exness_seeder.py
  modified:
    - python/opendeviationbar/data/symbols.toml
    - python/opendeviationbar/config/__init__.py

key-decisions:
  - "effective_start=2022-01-03 (first trading Monday of 2022, not Jan 1 which is Saturday)"
  - "XAUUSD thresholds [200, 500, 1000] (wider spreads vs forex [50, 100, 200])"
  - "EURUSD/GBPUSD/USDJPY/XAUUSD as tier 1, rest as tier 2"
  - "No kintsugi_priority field (kintsugi integration deferred)"

patterns-established:
  - "Forex symbols use asset_class=forex, exchange=exness, market=raw_spread"
  - "ExnessSeederConfig env prefix: OPENDEVIATIONBAR_EXNESS_SEEDER_"

requirements-completed: [EXNS-REG, EXNS-CFG]

# Metrics
duration: 2min
completed: 2026-03-23
---

# Phase 02 Plan 01: Registry + Config Summary

**10 Exness forex symbols registered in symbols.toml with ExnessSeederConfig pydantic-settings class for env-driven configuration**

## Performance

- **Duration:** 2 min
- **Started:** 2026-03-23T19:27:25Z
- **Completed:** 2026-03-23T19:29:13Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments

- Added 10 Exness forex symbols (EURUSD, GBPUSD, USDJPY, AUDUSD, USDCAD, NZDUSD, EURGBP, EURJPY, GBPJPY, XAUUSD) to unified symbol registry
- Created ExnessSeederConfig with 4 env-configurable fields following existing SeederConfig pattern
- All entries validated via tomllib parsing and AST verification

## Task Commits

Each task was committed atomically:

1. **Task 1: Add 10 Exness forex symbols to symbols.toml registry** - `6a83974` (feat)
2. **Task 2: Create ExnessSeederConfig pydantic-settings class** - `2531256` (feat)

## Files Created/Modified

- `python/opendeviationbar/data/symbols.toml` - Added 10 Exness forex symbol entries with correct schema
- `python/opendeviationbar/config/exness_seeder.py` - New ExnessSeederConfig(BaseSettings) with historical_start, max_concurrent_downloads, download_timeout_s, state_file
- `python/opendeviationbar/config/__init__.py` - Added lazy import for ExnessSeederConfig

## Decisions Made

- effective_start=2022-01-03 (first trading Monday of 2022) rather than Jan 1 (Saturday)
- XAUUSD gets wider thresholds [200, 500, 1000] due to wider spreads and larger price moves
- 4 symbols as tier 1 (EURUSD, GBPUSD, USDJPY, XAUUSD), 6 as tier 2
- No kintsugi_priority or data_anomalies fields (clean data assumed for Exness, kintsugi deferred)

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- symbols.toml ready for Plan 02 seeder script to query via get_symbol_entries(exchange="exness")
- ExnessSeederConfig ready for Plan 02 seeder script to load configuration
- No blockers

---

_Phase: 02-exness-daily-tick-cache-seeder-service-with-registry-integration_
_Completed: 2026-03-23_
