# Research Archive Index

**Molodetz Institute — Research & Retrieval Division.** This is the living registry of every subject in `research/`. It is updated in the same pass as any new research, per the standing rule in `README.md` §4. Never edit a subject's documents without also updating its row here.

## Global statistics

| Metric | Value |
|---|---|
| Subjects | 4 |
| Total source documents | 225 |
| — Tier 1 (Source Dossier, independently analyzed) | 84 |
| — Tier 2 (Source Citation Card, listed only) | 141 |
| Total conclusion documents | 4 |
| Archive opened | 2026-10-09 |
| Last updated | 2026-10-09 |

## Subjects

| Subject | Sources (T1 / T2) | Conclusions | Opened | Last updated | Driving task |
|---|---|---|---|---|---|
| [`sqlite-rag-hybrid-search`](sqlite-rag-hybrid-search/) | 32 (10 / 22) | 1 | 2026-10-09 | 2026-10-09 | Designing tmux-log export + chunked retrieval; settled on BM25-only, no vector DB |
| [`agent-memory-recency-tracking`](agent-memory-recency-tracking/) | 63 (16 / 47) | 1 | 2026-10-09 | 2026-10-09 | Designing an LRU-style last-used/use-count tracker for vault records and chunks |
| [`async-pty-process-testing`](async-pty-process-testing/) | 59 (20 / 39) | 1 | 2026-10-09 | 2026-10-09 | Designing tai_test.py (pty vs. pipes, non-blocking stdin, process-group cleanup, test-framework shape) — backfilled after it was initially skipped, see activity log |
| [`shell-multiplexer-auto-attach`](shell-multiplexer-auto-attach/) | 71 (38 / 33) | 1 | 2026-10-09 | 2026-10-09 | Designing a tai-managed terminal multiplexer + bashrc auto-attach: tmux-as-substrate recommendation, interactive-vs-automation shell detection |

## Recent activity log

| Date | Subject | Event |
|---|---|---|
| 2026-10-09 | — | Archive created: specification (`README.md`), index (this file), and both subjects above backfilled from the day's research in full, per explicit instruction to retroactively capture every source consulted that day. |
| 2026-10-09 | `sqlite-rag-hybrid-search` | 32 sources (10 Tier 1 / 22 Tier 2) + 1 conclusion recorded (the conclusion: pure SQLite FTS5/BM25 chunked search, deliberately no embeddings/vector DB — see `conclusions/`). Counts verified directly against the written files, not taken from the authoring agent's self-report. |
| 2026-10-09 | — | Spec change: `Tier` split into its own standalone metadata row (`1` / `2` / `N/A`) instead of a parenthetical inside `Document type`, so it's directly filterable. All 97 existing documents across both subjects backfilled to match in the same pass; counts re-verified afterward (unchanged: 26 Tier 1, 69 Tier 2, 2 Conclusions). |
| 2026-10-09 | `agent-memory-recency-tracking` | 63 sources (16 Tier 1 / 47 Tier 2) + 1 conclusion recorded (the conclusion: `last_used`/`use_count` tracking proposal for records and chunks, throttled-write pattern, no eviction policy yet — see `conclusions/`). One source (`glama-code-index-mcp-bm25-hybrid.md`) was promoted from the originally-planned Tier 2 to Tier 1 by the authoring agent mid-task because it contained specific attributable numeric findings — exactly the judgment call §3 of `README.md` calls for, logged here rather than silently absorbed. Counts verified directly against the written files. |
| 2026-10-09 | `async-pty-process-testing` | New subject, opened as a correction: the eight `WebSearch` calls behind `tai_test.py`'s design (pty vs. pipes, non-blocking stdin, process-group cleanup, test-framework patterns) were initially skipped from the archive under the reasoning "informal engineering reference, not a design decision" — a silent, unilateral exception to the Research Rule, and wrong (see `README.md` §4's added "no exception, ever" paragraph). Backfilled: 59 sources (20 Tier 1 / 39 Tier 2) + 1 conclusion (`conclusions/tai-test-framework-design.md`). Counts verified directly against the written files via `research/audit.py`, not taken from the authoring agent's self-report alone. A `PostToolUse`/`WebSearch` hook (`.claude/settings.json`) was also added the same day specifically to stop this from recurring. |
| 2026-10-09 | `shell-multiplexer-auto-attach` | 71 sources (38 Tier 1 / 33 Tier 2) + 1 conclusion recorded (the conclusion: build on tmux as a substrate rather than a from-scratch multiplexer; reliable human-vs-automation shell detection has no single solution, only a combination of weaker signals plus a safety-file escape hatch). Counts verified directly against the written files via `research/audit.py`. Hook fired correctly for all 8 underlying WebSearch calls during this task. |

## How to use this index

- Before starting new research, search this table for an existing subject before opening a new one (see `README.md` §2, "one subject, one home").
- Every subject folder is self-contained: its sources live flat inside it, its conclusions live in its `conclusions/` subfolder.
- Tier 1 vs Tier 2 is a statement about how deeply a source was actually read, not about its importance — see `README.md` §3 for the exact distinction.