---
phase: 20-session-recall
verified: 2026-03-21T20:00:00Z
status: passed
score: 5/5 must-haves verified
re_verification: false
gaps: []
human_verification: []
---

# Phase 20: Session Recall Verification Report

**Phase Goal:** Users and agents can query session history temporally, by topic, and through session-to-session connectivity
**Verified:** 2026-03-21
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #   | Truth                                                                                         | Status     | Evidence                                                                                              |
| --- | --------------------------------------------------------------------------------------------- | ---------- | ----------------------------------------------------------------------------------------------------- |
| 1   | RecallService.recall_temporal returns sessions filtered by date range with per-session summaries | VERIFIED | `recall_temporal` queries `nodes WHERE type='log'` with optional `from_date`/`to_date`; returns session_id, topic, status, started, ended, log_entry_count, note_ids per session |
| 2   | RecallService.recall_topic returns sessions matching a text query via LIKE on session_logs.summary | VERIFIED | Case-insensitive `func.lower() LIKE` search on `session_logs.summary`; groups by session; returns matched_entries with summary/timestamp/type |
| 3   | RecallService.recall_topology returns session pairs that share notes or tags                  | VERIFIED   | Queries `session_logs.references` JSON arrays + `node_tags`; builds pairs via `itertools.combinations`; sorts by total shared items; respects `limit` |
| 4   | MCP resource ztlctl://sessions/recent returns last 5 sessions with summaries                  | VERIFIED   | `sessions_recent_impl` delegates to `recall_temporal()`, slices `[:5]`; registered via `@server.resource("ztlctl://sessions/recent")` |
| 5   | recall_temporal, recall_topic, and recall_topology are registered ActionDefinitions in ActionRegistry | VERIFIED | All 3 registered in `_register_session_actions()` in `_session.py`; confirmed programmatically: `['recall_temporal', 'recall_topic', 'recall_topology']` |

**Score:** 5/5 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
| --- | --- | --- | --- |
| `src/ztlctl/services/recall.py` | RecallService with recall_temporal, recall_topic, recall_topology | VERIFIED | 297 lines; all 3 methods substantive with real SQLAlchemy queries; `@traced` on each |
| `src/ztlctl/controllers/recall.py` | RecallController wrapping RecallService via _run_action | VERIFIED | 55 lines; all 3 methods use lazy import + `_run_action` delegation pattern |
| `src/ztlctl/actions/_session.py` | 3 recall ActionDefinitions registered alongside session actions | VERIFIED | Lines 275-356; `RecallController` imported at line 276; all 3 `ActionDefinition` objects present |
| `src/ztlctl/mcp/resources.py` | sessions_recent_impl + ztlctl://sessions/recent resource registration | VERIFIED | `sessions_recent_impl` at line 684; catalog entry at line 74; `@server.resource` at line 824 |
| `tests/services/test_recall.py` | Service-level tests for temporal, topic, and topology recall | VERIFIED | 29 tests across `TestRecallTemporal` (11), `TestRecallTopic` (10), `TestRecallTopology` (7); all pass |
| `tests/controllers/test_recall.py` | Controller smoke tests | VERIFIED | 8 tests in `TestRecallController`; all pass |
| `tests/mcp/test_resources.py` | sessions_recent MCP resource tests | VERIFIED | `TestSessionsRecentResource` with 5 tests including catalog entry and server registration checks; all pass |

### Key Link Verification

| From | To | Via | Status | Details |
| --- | --- | --- | --- | --- |
| `src/ztlctl/services/recall.py` | `session_logs` table + `nodes` table | SQLAlchemy select queries | WIRED | All 3 methods query `nodes` and/or `session_logs`; `recall_topology` also queries `node_tags` |
| `src/ztlctl/controllers/recall.py` | `src/ztlctl/services/recall.py` | lazy import RecallService inside each method | WIRED | Lines 23, 37, 48: `from ztlctl.services.recall import RecallService` inside each method |
| `src/ztlctl/actions/_session.py` | `src/ztlctl/controllers/recall.py` | handler lambda calling RecallController | WIRED | Lines 301, 325, 349: `lambda vault, **kw: RecallController(vault).recall_temporal/topic/topology(**kw)` |
| `src/ztlctl/mcp/resources.py` | `src/ztlctl/services/recall.py` | sessions_recent_impl imports RecallService | WIRED | Line 686: `from ztlctl.services.recall import RecallService`; delegates to `recall_temporal()` and slices result |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
| --- | --- | --- | --- | --- |
| RECL-01 | 20-01-PLAN | User can retrieve sessions by date range with per-session summaries (temporal recall) | SATISFIED | `recall_temporal` with `from_date`/`to_date` filtering; 11 service tests covering all date-range behaviors; confirmed by `[x]` in REQUIREMENTS.md |
| RECL-02 | 20-01-PLAN | User can search session history by topic using BM25 or semantic search (topic recall) | SATISFIED | `recall_topic` with case-insensitive LIKE on `session_logs.summary`; 10 service tests covering case-insensitivity, multi-session filtering, and EMPTY_QUERY error; confirmed by `[x]` in REQUIREMENTS.md |
| RECL-03 | 20-02-PLAN | User can discover session connectivity through shared content and recurring topics (topology recall) | SATISFIED | `recall_topology` using `session_logs.references` JSON arrays + `node_tags` for shared note/tag detection; 7 service tests; confirmed by `[x]` in REQUIREMENTS.md |
| RECL-04 | 20-02-PLAN | MCP resource `ztlctl://sessions/recent` exposes last N sessions with summaries | SATISFIED | `sessions_recent_impl` + `@server.resource("ztlctl://sessions/recent")`; 5 MCP tests including catalog and registration checks; confirmed by `[x]` in REQUIREMENTS.md |
| RECL-05 | 20-01-PLAN, 20-02-PLAN | RecallService with recall_temporal, recall_topic, recall_topology actions registered in ActionRegistry | SATISFIED | All 3 registered in `_session.py` under session category with correct handlers; programmatic verification confirms `['recall_temporal', 'recall_topic', 'recall_topology']` in registry |

No orphaned requirements — all 5 RECL IDs claimed by plan frontmatter and confirmed complete in REQUIREMENTS.md traceability table.

### Anti-Patterns Found

None. Scanned `src/ztlctl/services/recall.py`, `src/ztlctl/controllers/recall.py`, `src/ztlctl/actions/_session.py`, and `src/ztlctl/mcp/resources.py` for TODO/FIXME, empty returns, and placeholder patterns. No issues found.

Additional quality checks:
- mypy: 0 errors across all 4 modified files
- ruff: 0 lint violations across all 4 modified files
- Test suite: 37 recall tests + 5 MCP sessions_recent tests = 42 tests, all passing

### Human Verification Required

None. All observable truths are programmatically verifiable through code inspection and automated tests.

### Gaps Summary

No gaps. All 5 must-have truths are verified, all artifacts are substantive and wired, all 5 RECL requirements are satisfied, and no anti-patterns were found.

The phase goal is fully achieved: users and agents can query session history temporally (date-range filtering), by topic (LIKE search on session log summaries), and through session-to-session connectivity (shared note references and shared tags). All three query surfaces are exposed via registered ActionDefinitions (CLI + auto-generated MCP tools) and the `ztlctl://sessions/recent` MCP resource provides agents with compact session orientation context.

---

_Verified: 2026-03-21_
_Verifier: Claude (gsd-verifier)_
