---
phase: 13-registry-mode-enum
verified: 2026-03-27T06:00:00Z
status: passed
score: 9/9 must-haves verified
re_verification: false
---

# Phase 13: Registry Mode Enum Verification Report

**Phase Goal:** Every consumer (sidecar, kintsugi, heartbeat, validation) can query any symbol's ouroboros mode from the registry, with Aion as a first-class variant alongside Day
**Verified:** 2026-03-27
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

Plan 01 must-haves (REG-01, REG-02, REG-03, REG-05):

| #   | Truth                                                                     | Status   | Evidence                                                                                                                                    |
| --- | ------------------------------------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| 1   | OuroborosMode.AION exists as a first-class enum variant with value 'aion' | VERIFIED | `ouroboros.py` line 39: `AION = "aion"` present; `OuroborosMode.AION.value == 'aion'` confirmed at runtime                                  |
| 2   | Every symbol in symbols.toml has an ouroboros_mode field                  | VERIFIED | `grep -c 'ouroboros_mode'` counts 30 aion + 10 day = 40 total symbols; all 40 symbols loaded at runtime have `ouroboros_mode`               |
| 3   | get_symbol_entries()['BTCUSDT'].ouroboros_mode returns OuroborosMode.AION | VERIFIED | Runtime assertion `entries['BTCUSDT'].ouroboros_mode == OuroborosMode.AION` passed; 30 crypto symbols all AION confirmed                    |
| 4   | Attempting ouroboros_mode='aion' on a forex symbol raises ValueError      | VERIFIED | Test `test_aion_on_forex_raises_valueerror` exercises the validation logic at parse-time; crypto-only gate at `symbol_registry.py` line 335 |
| 5   | validate_ouroboros_mode('aion') returns 'aion' without error              | VERIFIED | Set-based validation `valid = {"day", "aion"}` at `ouroboros.py` line 299; runtime assertion passed                                         |

Plan 02 must-haves (REG-04):

| #   | Truth                                                                                  | Status   | Evidence                                                                                              |
| --- | -------------------------------------------------------------------------------------- | -------- | ----------------------------------------------------------------------------------------------------- | -------------------------------------------------------- |
| 6   | get_open_deviation_bars('BTCUSDT', ..., ouroboros_mode='aion') accepts without error   | VERIFIED | `inspect.signature` confirms `ouroboros_mode: Literal['day', 'aion']                                  | None`;`validate_ouroboros_mode()` called at line 326-328 |
| 7   | get_n_open_deviation_bars('BTCUSDT', ..., ouroboros_mode='aion') accepts without error | VERIFIED | `open_deviation_bars.pyi` updated with `Literal["day", "aion"]` on all 3 overloads (lines 16, 44, 71) |
| 8   | populate_cache_resumable('BTCUSDT', ..., ouroboros_mode='aion') accepts without error  | VERIFIED | `checkpoint/__init__.pyi` lines 12 and 31 both use `Literal["day", "aion"]                            | None`                                                    |
| 9   | Type stubs reflect Literal['day', 'aion'] for all ouroboros_mode parameters            | VERIFIED | No remaining solo `Literal["day"]` found in `open_deviation_bars.pyi` or `checkpoint/__init__.pyi`    |

**Score:** 9/9 truths verified

### Required Artifacts

| Artifact                                                        | Expected                                          | Status   | Details                                                                                                                                          |
| --------------------------------------------------------------- | ------------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ----- |
| `python/opendeviationbar/ouroboros.py`                          | OuroborosMode enum with DAY and AION variants     | VERIFIED | Contains `AION = "aion"` at line 39; `validate_ouroboros_mode` returns `Literal["day", "aion"]`                                                  |
| `python/opendeviationbar/data/symbols.toml`                     | ouroboros_mode field on every symbol              | VERIFIED | 30 entries with `"aion"`, 10 entries with `"day"`; 40 total symbols covered                                                                      |
| `python/opendeviationbar/symbol_registry.py`                    | SymbolEntry with ouroboros_mode field, validation | VERIFIED | `ouroboros_mode: OuroborosMode` field at line 248; crypto-only gate at line 335; `get_registered_symbols(ouroboros_mode=...)` filter at line 569 |
| `python/opendeviationbar/orchestration/open_deviation_bars.py`  | get_open_deviation_bars with expanded type        | VERIFIED | Line 44: `Literal["day", "aion"]                                                                                                                 | None` |
| `python/opendeviationbar/orchestration/open_deviation_bars.pyi` | Type stubs with Literal['day', 'aion']            | VERIFIED | 3 occurrences of `Literal["day", "aion"]`; no remaining solo `Literal["day"]`                                                                    |
| `python/opendeviationbar/checkpoint/__init__.pyi`               | populate_cache_resumable stubs with expanded type | VERIFIED | Lines 12 and 31 both use `Literal["day", "aion"]                                                                                                 | None` |
| `python/opendeviationbar/config/population.py`                  | PopulationConfig accepts Literal["day", "aion"]   | VERIFIED | Line 57: `ouroboros_mode: Literal["day", "aion"] = "day"`; field_validator delegates to `validate_ouroboros_mode()`                              |

### Key Link Verification

| From                                    | To                                     | Via                                  | Status   | Details                                                                                     |
| --------------------------------------- | -------------------------------------- | ------------------------------------ | -------- | ------------------------------------------------------------------------------------------- |
| `symbol_registry.py`                    | `ouroboros.py`                         | `OuroborosMode` import for type      | VERIFIED | `from opendeviationbar.ouroboros import OuroborosMode` at line 34                           |
| `symbol_registry.py`                    | `data/symbols.toml`                    | TOML parsing of ouroboros_mode field | VERIFIED | `raw_mode = data.get("ouroboros_mode", "day")` + `OuroborosMode(raw_mode)` at lines 332-333 |
| `orchestration/open_deviation_bars.py`  | `ouroboros.py`                         | `validate_ouroboros_mode` call       | VERIFIED | Import at line 326; `validate_ouroboros_mode(ouroboros_mode)` at line 328                   |
| `orchestration/open_deviation_bars.pyi` | `orchestration/open_deviation_bars.py` | Type stubs match implementation      | VERIFIED | Both use `Literal["day", "aion"]`; 3 overload signatures aligned                            |

### Data-Flow Trace (Level 4)

Not applicable. Phase 13 is an enum/type system phase with no dynamic data rendering — it modifies Python type annotations, TOML fields, and dataclass fields. The data that "flows" is the `ouroboros_mode` value from TOML parsing into `SymbolEntry`, which is verified via runtime import checks rather than DB queries.

### Behavioral Spot-Checks

| Behavior                                                     | Command                                                                                                                                                 | Result                                                                 | Status |
| ------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------- | ------ | ---- |
| OuroborosMode.AION.value == 'aion'                           | `python -c "from opendeviationbar.ouroboros import OuroborosMode; assert OuroborosMode.AION.value == 'aion'"`                                           | Exit 0                                                                 | PASS   |
| BTCUSDT.ouroboros_mode == OuroborosMode.AION                 | `python -c "from opendeviationbar.symbol_registry import get_symbol_entries; e=get_symbol_entries(); assert e['BTCUSDT'].ouroboros_mode.value=='aion'"` | Exit 0                                                                 | PASS   |
| 30 crypto symbols all AION, 10 forex all DAY                 | Runtime assertions via Python                                                                                                                           | `Crypto: 30 symbols, all aion: True; Forex: 10 symbols, all day: True` | PASS   |
| get_open_deviation_bars signature has Literal['day', 'aion'] | `inspect.signature(get_open_deviation_bars)` check                                                                                                      | `Literal['day', 'aion']                                                | None`  | PASS |
| validate_ouroboros_mode('aion') returns 'aion'               | Runtime assertion                                                                                                                                       | Exit 0                                                                 | PASS   |
| Full test suite passes                                       | `pytest tests/test_ouroboros.py tests/test_symbol_registry.py`                                                                                          | 107 passed in 3.82s                                                    | PASS   |

### Requirements Coverage

| Requirement | Source Plan | Description                                                                               | Status    | Evidence                                                                                         |
| ----------- | ----------- | ----------------------------------------------------------------------------------------- | --------- | ------------------------------------------------------------------------------------------------ |
| REG-01      | 13-01       | `ouroboros_mode` field added to every symbol in `symbols.toml` with `"day"` as default    | SATISFIED | 40 symbols have `ouroboros_mode`; default `data.get("ouroboros_mode", "day")` in parser          |
| REG-02      | 13-01       | `SymbolEntry` dataclass in `symbol_registry.py` exposes `ouroboros_mode` to all consumers | SATISFIED | `ouroboros_mode: OuroborosMode` field on dataclass; accessible via `entry.ouroboros_mode`        |
| REG-03      | 13-01       | `OuroborosMode` enum in `ouroboros.py` expanded with `AION = "aion"` variant              | SATISFIED | `AION = "aion"` at line 39; docstring updated; `OuroborosMode("aion")` works                     |
| REG-04      | 13-02       | All public Python API signatures accept `ouroboros_mode: Literal["day", "aion"]`          | SATISFIED | `open_deviation_bars.py` + `.pyi` + `checkpoint/__init__.pyi` all updated                        |
| REG-05      | 13-01       | Registry validation rejects `ouroboros_mode = "aion"` for non-crypto symbols              | SATISFIED | `if parsed_mode == OuroborosMode.AION and asset_class != "crypto": raise ValueError` at line 335 |

No orphaned requirements. All REG-01 through REG-05 are claimed by plans 13-01 and 13-02 and confirmed implemented.

### Anti-Patterns Found

No anti-patterns found. All modified files scanned for TODO/FIXME, placeholder returns, and empty implementations — none detected.

### Human Verification Required

None. All observable truths were verifiable programmatically:

- Enum variant existence: static inspection
- TOML field coverage: grep + runtime count
- Dataclass field: runtime attribute check
- Type stub accuracy: grep
- Crypto-only constraint: test coverage + logic trace
- Backward compatibility: 107-test suite pass

### Gaps Summary

No gaps. All 9 must-haves across both plans are fully verified. The phase goal is achieved: every consumer can query any symbol's ouroboros mode from the registry (`entry.ouroboros_mode`), with `OuroborosMode.AION` as a first-class variant alongside `OuroborosMode.DAY`. The foundation is complete for downstream phases (sidecar Aion startup path, kintsugi Aion repair, heartbeat Aion checks).

---

_Verified: 2026-03-27_
_Verifier: Claude (gsd-verifier)_
