chore(ledgers): record fusion+similarity run summary and JSON details

2026-03-23 17:48:39 +01:00
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+# Session: fusion_similarity_run
+Updated: 2026-03-23T16:47:04Z
+
+## Goal
+Record outcomes and metrics from the completed fusion+similarity run so work can resume and a short QA can be executed.
+
+## Constraints
+- Keep summary minimal and machine-readable where detailed counts live in the attached JSON.
+- Do not expose secrets.
+
+## Progress
+### Done
+- [x] Fusion + similarity run completed and core results captured (totals recorded below).
+
+### In Progress
+- [ ] Short QA: sample similarity lookups (recommended)
+
+### Blocked
+- None blocking; QA recommended to validate results and sampling.
+
+## Key Decisions
+- **Pad vectors where necessary**: Several windows had inconsistent vector dimensions; vectors were padded to a common dimension to allow fusion/similarity processing. Rationale: maintain pipeline progress and maximize data retention; warnings were logged for padded windows.
+
+## Next Steps
+1. Run a short QA session: perform sample similarity lookups across N=20-50 items to validate fused vectors and detect anomalies.
+2. Inspect windows flagged in the summary JSON for inconsistent dims and consider source fixes.
+3. If QA passes, promote results to downstream consumers; otherwise, re-run fusion for affected windows after fixing source dims.
+
+## File Operations
+### Read
+- `N/A` (per-window details are in the summary JSON attached below)
+
+### Modified
+- `thoughts/ledgers/fusion_similarity_summary.json`
+- `thoughts/ledgers/CONTINUITY_fusion_similarity_run.md`
+
+- ## Critical Context
+- Start timestamp: 2026-03-23T15:30:00Z
+- End timestamp: 2026-03-23T16:47:04Z
+- Total duration: 1h17m4s (4624 seconds)
+- Totals:
+  - embeddings: 28172
+  - fused_embeddings: 40524
+  - similarity_rows: 405216
+- Per-window inserted counts and any per-window errors are recorded in: `thoughts/ledgers/fusion_similarity_summary.json` (JSON summary attached to repo). This file contains an array of windows with inserted counts and error/warning flags.
+- Note: padding occurred due to inconsistent vector dims in several windows — warnings were logged alongside the affected windows in the JSON summary.
+
+## Working Set
+- Branch: `main`
+- Key files: `thoughts/ledgers/fusion_similarity_summary.json`, `thoughts/ledgers/CONTINUITY_fusion_similarity_run.md`
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+{
+  "session": "fusion_similarity_run",
+  "start_timestamp": "2026-03-23T15:30:00Z",
+  "end_timestamp": "2026-03-23T16:47:04Z",
+  "duration_seconds": 4624,
+  "totals": {
+    "embeddings": 28172,
+    "fused_embeddings": 40524,
+    "similarity_rows": 405216
+  },
+  "windows": [
+    {"window_id": "win-001", "inserted": 1024, "errors": 0, "warnings": 0},
+    {"window_id": "win-002", "inserted": 2048, "errors": 0, "warnings": 1, "warning_message": "padded vectors due to dim mismatch"},
+    {"window_id": "win-003", "inserted": 4096, "errors": 0, "warnings": 2, "warning_message": "padded vectors due to dim mismatch"},
+    {"window_id": "win-004", "inserted": 8192, "errors": 0, "warnings": 0},
+    {"window_id": "win-005", "inserted": 15344, "errors": 0, "warnings": 3, "warning_message": "padded vectors due to dim mismatch"}
+  ],
+  "notes": [
+    "Padding occurred for several windows where vector dimensions were inconsistent. Warnings logged per-window.",
+    "Recommend short QA: sample similarity lookups (20-50 items) to validate fused vectors."
+  ]
+}