---
phase: 18-architecture-cleanup
verified: 2026-03-21T19:30:00Z
status: passed
score: 6/6 must-haves verified
re_verification: null
gaps: []
human_verification: []
---

# Phase 18: Architecture Cleanup Verification Report

**Phase Goal:** Compatibility residue is removed, phantom categories corrected, unused fields resolved, embedding dimensions made configurable, and graph commands performant on large vaults
**Verified:** 2026-03-21T19:30:00Z
**Status:** PASSED
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | workspace_modes.py is deleted and no imports reference it | VERIFIED | File absent; `grep -r workspace_modes src/` returns zero matches |
| 2 | No ActionDefinition uses the category string 'mutation' — custom note type update/close actions use 'lifecycle' | VERIFIED | `plugins/manager.py` lines 690, 701: `category="lifecycle"`; no `category="mutation"` in any source file |
| 3 | _DEFAULT_ACTIVE_CATEGORIES does not contain 'mutation' | VERIFIED | `mcp/generator.py` lines 86-88: frozenset is `{"creation", "query", "graph", "lifecycle", "session"}` |
| 4 | ServiceError.recovery field is documented as actively used | VERIFIED | `services/result.py` lines 23-29: `Field(description="Recovery hint for agents/MCP consumers. Populated by controllers on validation or plugin-rejection errors.")` |
| 5 | EmbeddingProvider constructor does not hardcode 384 — uses DEFAULT_EMBEDDING_DIM constant | VERIFIED | `infrastructure/embeddings.py` line 16: `DEFAULT_EMBEDDING_DIM: int = 384`; line 42: `dim: int = DEFAULT_EMBEDDING_DIM` |
| 6 | bridges() uses k-approximation for betweenness centrality on graphs with more than 500 nodes | VERIFIED | `services/graph.py` lines 385-387: `node_count`, `k_param`, `nx.betweenness_centrality(g, k=k_param, seed=42)` — identical pattern to `_node_features()` at lines 596-598 |

**Score:** 6/6 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/ztlctl/workspace_modes.py` | Deleted | VERIFIED | File does not exist |
| `src/ztlctl/services/export.py` | Direct import from workspace_profiles | VERIFIED | Line 22: `from ztlctl.workspace_profiles import normalize_dashboard_viewer as normalize_viewer` |
| `src/ztlctl/mcp/generator.py` | Clean category set without phantom mutation | VERIFIED | `_DEFAULT_ACTIVE_CATEGORIES` = `{"creation", "query", "graph", "lifecycle", "session"}` |
| `src/ztlctl/plugins/manager.py` | Custom note type actions using lifecycle category | VERIFIED | Lines 690, 701: `category="lifecycle"` |
| `src/ztlctl/services/result.py` | ServiceError.recovery with Field description | VERIFIED | Lines 23-29: Pydantic `Field(description=...)` with clear usage context |
| `src/ztlctl/infrastructure/embeddings.py` | DEFAULT_EMBEDDING_DIM constant defined and used | VERIFIED | Line 16: constant definition; line 42: constructor default uses it |
| `src/ztlctl/services/graph.py` | bridges() with k-approximation threshold | VERIFIED | Lines 385-387: `k_param` with `500` node threshold, `seed=42` |
| `tests/infrastructure/test_embeddings.py` | Tests import DEFAULT_EMBEDDING_DIM | VERIFIED | Line 7: `from ztlctl.infrastructure.embeddings import DEFAULT_EMBEDDING_DIM`; used in all assertions |
| `tests/mcp/test_generator.py` | Assertion updated to 5-category set (no mutation) | VERIFIED | No `mutation` references in file; assertion reflects current 5-category default |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `src/ztlctl/services/export.py` | `src/ztlctl/workspace_profiles.py` | direct import replacing workspace_modes indirection | WIRED | Line 22: `from ztlctl.workspace_profiles import normalize_dashboard_viewer as normalize_viewer`; used at line 329 |
| `src/ztlctl/plugins/manager.py` | `src/ztlctl/mcp/generator.py` | category alignment — both use lifecycle, not mutation | WIRED | `manager.py` uses `"lifecycle"` (2 occurrences); `generator.py` `_DEFAULT_ACTIVE_CATEGORIES` includes `"lifecycle"` and excludes `"mutation"` |
| `src/ztlctl/config/models.py` | `src/ztlctl/infrastructure/embeddings.py` | shared DEFAULT_EMBEDDING_DIM constant (comment cross-reference) | PARTIAL-ACCEPTABLE | `config/models.py` line 105 uses literal `384` with comment `# Must match DEFAULT_EMBEDDING_DIM in ztlctl.infrastructure.embeddings`; direct import avoided by design to prevent circular dependency — this is the documented decision in 18-02-SUMMARY.md |
| `src/ztlctl/services/graph.py` | networkx | betweenness_centrality k parameter | WIRED | Lines 387, 598: `nx.betweenness_centrality(g, k=k_param, seed=42)` in both `bridges()` and `_node_features()`; no bare `betweenness_centrality(g)` calls remain |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| ARCH-10 | 18-01 | Compatibility residue removed — workspace_modes.py deleted | SATISFIED | File deleted; no references in src/; direct import in export.py |
| DEBT-05 | 18-01 | Phantom mutation category cleaned up | SATISFIED | Removed from `_DEFAULT_ACTIVE_CATEGORIES`; plugin manager uses `lifecycle` |
| DEBT-06 | 18-01 | ServiceError.recovery field used or removed | SATISFIED | Kept with Pydantic Field description documenting active usage by controllers and MCP layer |
| DEBT-01 | 18-02 | Embedding dimensions configurable (remove hardcoded values) | SATISFIED | `DEFAULT_EMBEDDING_DIM = 384` constant defined; constructor uses it; tests use it; config comment cross-references it |
| DEBT-08 | 18-02 | bridges() betweenness centrality uses k-approximation | SATISFIED | Three-line k-approximation pattern identical to `_node_features()` in place at lines 385-387 |

All 5 requirements marked `[x]` complete in `.planning/REQUIREMENTS.md` checklist and `Complete` in traceability table.

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| — | — | None | — | — |

No TODOs, FIXMEs, placeholders, stub returns, or empty implementations found in any modified file.

### Human Verification Required

None. All phase goals are mechanically verifiable via code inspection:
- File deletion/import graph: grep-verifiable
- Category string values: grep-verifiable
- Pydantic Field description: grep-verifiable
- Named constant usage: grep-verifiable
- k-approximation call pattern: grep-verifiable

### Commit Verification

All 5 commits from SUMMARYs confirmed present in git log:

| Hash | Message |
|------|---------|
| `2639f70` | refactor(18-01): remove workspace_modes.py and fix phantom mutation category |
| `2071114` | fix(18-01): document ServiceError.recovery with Field description and mark ARCH-10/DEBT-05/DEBT-06 complete |
| `69ee24e` | style(18-01): fix line too long in ServiceError.recovery Field description |
| `7d4637b` | feat(18-02): centralize embedding dim constant and add bridges k-approximation |
| `9886c73` | docs(18-02): mark DEBT-01 and DEBT-08 complete in REQUIREMENTS.md |

### Gaps Summary

No gaps. All 6 observable truths verified, all 9 artifacts substantive and wired, all 5 requirements satisfied, zero anti-patterns detected.

The one design deviation worth noting (config/models.py uses literal `384` with a comment rather than importing `DEFAULT_EMBEDDING_DIM`) is explicitly documented in `18-02-SUMMARY.md` as an intentional decision to avoid a potential circular import between the config and infrastructure layers. The comment cross-reference achieves the stated goal of "no unexplained magic numbers" without introducing an import dependency. This is classified PARTIAL-ACCEPTABLE, not a gap.

---

_Verified: 2026-03-21T19:30:00Z_
_Verifier: Claude (gsd-verifier)_
