---
phase: 01-symbol-disambiguation
verified: 2026-03-20T11:15:00Z
status: gaps_found
score: 4/4 must-haves verified (1 warning)
gaps:
  - truth: "All phase artifacts are committed and CI-clean"
    status: partial
    reason: "Integration test file tests/symbol_disambiguation.rs is untracked (not committed) and has cargo fmt violations"
    artifacts:
      - path: "tests/symbol_disambiguation.rs"
        issue: "File is untracked (not in any commit) and fails cargo fmt -- --check"
    missing:
      - "Commit tests/symbol_disambiguation.rs to git"
      - "Run cargo fmt on tests/symbol_disambiguation.rs before committing"
---

# Phase 1: Symbol Disambiguation Verification Report

**Phase Goal:** C# symbol lookups resolve without false ambiguity errors
**Verified:** 2026-03-20T11:15:00Z
**Status:** gaps_found
**Re-verification:** No -- initial verification

## Goal Achievement

### Observable Truths

| #   | Truth | Status | Evidence |
| --- | ----- | ------ | -------- |
| 1   | Looking up a C# class by name returns the class definition even when a same-named constructor exists | VERIFIED | `kind_disambiguation_tier` returns tier 1 for Class, tier 3 for Function; `resolve_symbol_selector` auto-selects the sole tier-1 candidate. Unit test `test_resolve_selector_class_vs_constructor_returns_class` passes. Integration test `test_symb02_csharp_class_constructor_disambiguation` passes with real C# parsing. |
| 2   | `resolve_symbol_selector` applies kind-tier priority to auto-disambiguate cross-kind matches | VERIFIED | New `kind_disambiguation_tier` function at query.rs:392 with 4 tiers covering all 15 `SymbolKind` variants. `resolve_symbol_selector` at query.rs:440-458 uses `min_tier`/`top_tier` logic to auto-select when highest tier has exactly one candidate. Old `container_indices` heuristic fully removed (0 matches). Tests: `test_resolve_selector_module_vs_function_returns_module`, `test_resolve_selector_three_way_picks_highest_tier` both pass. |
| 3   | Two symbols at the same priority tier still produce an Ambiguous error with candidates listed | VERIFIED | Same-tier branch falls through to `SymbolSelectorMatch::Ambiguous` at query.rs:460-464. Tests: `test_resolve_selector_same_tier_returns_ambiguous` (two Functions), `test_resolve_selector_same_tier_class_struct_returns_ambiguous` (Class + Struct at tier 1) both pass. Integration test `test_symb03_genuine_ambiguity_preserved` passes with real Python parsing. |
| 4   | Existing single-match and not-found behavior is unchanged | VERIFIED | Full test suite: 1185 lib + 131 integration tests, 0 failures. The single-match and not-found code paths (query.rs:428-431) are untouched. Test `test_resolve_selector_explicit_kind_bypasses_tier_logic` confirms explicit `symbol_kind` filter still works correctly. |

**Score:** 4/4 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
| -------- | -------- | ------ | ------- |
| `src/live_index/query.rs` | `kind_disambiguation_tier` function and updated `resolve_symbol_selector` | VERIFIED | Function at line 392, 4-tier match covering all 15 SymbolKind variants. `resolve_symbol_selector` at line 405 uses tier logic at lines 440-458. Old `container_indices` heuristic fully removed. 7 new unit tests at lines 5518-5709. |
| `tests/symbol_disambiguation.rs` | Integration tests for SYMB-01, SYMB-02, SYMB-03 | WARNING (ORPHANED) | File exists (194 lines), 3 integration tests all pass, but file is **untracked** (not committed) and has `cargo fmt` violations on lines 70 and 122. |

### Key Link Verification

| From | To | Via | Status | Details |
| ---- | -- | --- | ------ | ------- |
| `resolve_symbol_selector` | `kind_disambiguation_tier` | called in multi-candidate branch to assign tiers and auto-select highest | WIRED | `kind_disambiguation_tier` called at query.rs:443 and query.rs:450 within the `_ =>` match arm of `resolve_symbol_selector` |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
| ----------- | ---------- | ----------- | ------ | -------- |
| SYMB-01 | 01-01-PLAN | `resolve_symbol_selector` auto-disambiguates when candidates span different kind tiers | SATISFIED | `kind_disambiguation_tier` function + tier logic in `resolve_symbol_selector`. Unit tests: `test_kind_disambiguation_tier_values`, `test_resolve_selector_module_vs_function_returns_module`, `test_resolve_selector_three_way_picks_highest_tier`. Integration test: `test_symb01_container_vs_member_auto_disambiguation`. |
| SYMB-02 | 01-01-PLAN | C# class lookup with name matching both class and constructor returns the class without error | SATISFIED | Class (tier 1) auto-selected over Function/constructor (tier 3). Unit test: `test_resolve_selector_class_vs_constructor_returns_class`. Integration test: `test_symb02_csharp_class_constructor_disambiguation` with real C# source. |
| SYMB-03 | 01-01-PLAN | Genuine ambiguity (two symbols at same priority tier) still returns Ambiguous error | SATISFIED | Same-tier candidates fall through to `Ambiguous` variant with candidate lines. Unit tests: `test_resolve_selector_same_tier_returns_ambiguous`, `test_resolve_selector_same_tier_class_struct_returns_ambiguous`. Integration test: `test_symb03_genuine_ambiguity_preserved`. |

No orphaned requirements found -- REQUIREMENTS.md maps exactly SYMB-01, SYMB-02, SYMB-03 to Phase 1, and all three are claimed by 01-01-PLAN.

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
| ---- | ---- | ------- | -------- | ------ |
| `tests/symbol_disambiguation.rs` | 70, 122 | `cargo fmt` violations (brace formatting in match arms) | Warning | CI would fail if file were committed as-is |
| `tests/symbol_disambiguation.rs` | N/A | Untracked file (not committed) | Warning | Integration tests exist but are not persisted in version control |

No TODOs, FIXMEs, placeholders, or empty implementations found in any modified files.

### Human Verification Required

### 1. C# Class/Constructor Resolution End-to-End

**Test:** Open a real C# project with SymForge running. Use `get_symbol` to look up a class name that also has a constructor (e.g., `Foo` in a file with `public class Foo { public Foo() {} }`). Do not specify `symbol_kind`.
**Expected:** The class definition is returned, not an ambiguity error.
**Why human:** Integration test uses a small synthetic file; real-world C# files may have additional complexity (nested classes, partial classes, multiple constructors).

### 2. Three-Way Disambiguation in Real Code

**Test:** Create a file with a Class, Module, and Function all named the same. Use `get_symbol` with just the name.
**Expected:** The Class (tier 1) is returned automatically.
**Why human:** While the unit test covers this, real parser output ordering may differ from test fixtures.

### Gaps Summary

The core implementation is complete and fully functional. All 4 observable truths are verified with both unit tests (7 tests) and integration tests (3 tests). All 3 requirement IDs (SYMB-01, SYMB-02, SYMB-03) are satisfied with strong test coverage. The full test suite passes with 0 failures across 1316+ tests.

**One gap exists:** The integration test file `tests/symbol_disambiguation.rs` was created during execution but never committed to git. It also has minor `cargo fmt` violations (brace formatting on two match arms). This means:
- The integration tests are not persisted in version control
- `cargo fmt -- --check` currently fails due to this untracked file's formatting

This is a housekeeping gap, not a functional gap. The phase goal "C# symbol lookups resolve without false ambiguity errors" is achieved in the codebase. The gap only affects CI cleanliness and test persistence.

---

_Verified: 2026-03-20T11:15:00Z_
_Verifier: Claude (gsd-verifier)_
