session 2026-06-13: Studium Steps 3-4 + chamber-library canonical_texts tier (176-source graduation); L1 baton back (Seb replied)

claude/memory/MEMORY.md

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 - [ARC chamber v1-legacy cluster](project-arc-chamber-v1-legacy-cluster.md) — ARC's `content/chamber/**` is intentional v1-Chamber legacy (not drift); deferred to-do = gather into a presentable cluster as a record of development. Out of §5 clause-1 audit scope. Confirmed 2026-05-29.
 - Studium Engine — *tracker not yet established*; substantive moves live in per-session memories (2026-05-15 onward) + the seed brief at `~/_Dev/studium-engine/`.
 - [MemPalace 3.4.0 upgrade plan](project-mempalace-upgrade-3-4-0-plan.md) — scheduled post-heavy-work (ratified 2026-06-07): backup → upgrade → verify layers.py recency fix → re-test wing filter; migrate-wings + repair EXCLUDED. Basic Memory RETIRED 2026-06-07 (false-clean sync verdict; lessons → CM-AI substrate-failure-lessons-2026-06-07.md).
-- [L1 reliability](project-L1-reliability.md) — canonical workstream tracker established 2026-05-28 (Symmetria-pulse decision). Current state at top (updated 2026-06-06) + chronological log 2026-03-21→. **Status: the 2026-06-06 three-note reply arc is SENT (`b255e74`/`0ecb45e`/`2e87bab`) — baton with Seb; do not re-enter L1 until he responds/pushes.** mindfabric-00 root-caused (temporal chain path) + restart-as-holding-pattern + backed up; PENDING-27 awaits jurist. Read tracker at /wake-up before composing L1 portion of any briefing.
+- [L1 reliability](project-L1-reliability.md) — canonical workstream tracker established 2026-05-28 (Symmetria-pulse decision). Current state at top (updated 2026-06-06) + chronological log 2026-03-21→. **Status: BATON BACK — Seb replied 2026-06-13 (`cc25995` reply + `e2e94ab` cover note + `8f76bf2` benchmark-governance v1.1 §4.4, now in CM-AI local `main`). Steward set a brief L1 detour to engage it next session before returning to Studium Step 5. Read Seb's commits + this tracker before composing any response.** mindfabric-00 root-caused (temporal chain path) + restart-as-holding-pattern + backed up; PENDING-27 awaits jurist. Read tracker at /wake-up before composing L1 portion of any briefing.
 - [Be (laundromat)](project-be-laundromat.md) — canonical workstream tracker established 2026-06-08 (Seb-relay of locked decisions). Be = Skemantix startup (Seb+David) funding CapableMind's funding-ladder; **bridge, not venture**. Decisions LOCKED: entity/exit (CapableMind decoupled, grant-funded), pricing (Living $12.99/mo · Archive $69.99/yr · Memorial $49.99/yr · Renovate ~$199 · $8.99 floor), CF Self-Serve Agency + versioned-template-package infra. **a11y gate MERGED (Pat 100/100/100).** Pre-revenue: the WTP gate = renovate Pat → charge her. **Discipline: stop adding spec until the gate clears → nothing for executor on be until then.** Repo @ `f43a0fd`.
 
 ## Active Session
+- [Session 2026-06-13 — Studium Steps 3-4 + chamber-library canonical_texts tier (176-source graduation)](session-2026-06-13-studium-steps-3-4-chamber-canonical-tier.md) — **Enormous build session.** Built chamber-library's **`canonical_texts/` tier** via a cleanliness-gated **176-source graduation** (`audit_cruft.py` extended to THE authoritative cleanliness gate — EPUB residue lock-step with the cleaner, `--clean`/`--summary`; `graduate_to_canonical.py` dry-run-first, canonicalize-on-entry, coupled manifest edit); generated **`catalogue.yaml`** source-of-truth (`build_catalogue.py`, `--check` drift gate, 417 sources); reading-index home → **`chamber-library/reading-indices/`** (manifest repointed); CM-AI indices **soft-retired** (5-file entanglement → stamp-in-place, surfaced-not-deleted); **35 space-filenames** canonicalized (`canonicalize_filenames.py`); pre-commit 5MB guard **reconciled with retire-LFS** (exempt corpus text). Then **Studium Steps 3 (chunker) + 4 (store+FTS5+coverage ledger)** — both verified against substrate: **Weber-non-leak**, **deterministic rebuild ID-equality** (Class-A non-fatal, criterion #1), byte-faithful, **paratext non-indexable**, every line classified→**silence warrantable**. **10 commits / 3 repos, all pushed.** **PULLING THREAD: brief L1 detour FIRST — Seb's reply landed in CapableMind-AI (`cc25995` reply + `e2e94ab` cover note, now in local main) — THEN return to Studium Step 5 (retrieval primitives: honest-empty + coverage warrant).** Studium `main @ b3274c4` clean+pushed; Steps 0–4 done.
+
+## Archived (2026-06-12 afternoon→night — Studium Steps 0·1·2 + source cleaning)
 - [Session 2026-06-12 (afternoon→night) — Studium Engine Stage-1 BUILT (Steps 0·1·2 + source cleaning); commit-org decision pending](session-2026-06-12-studium-engine-stage1-built-cleaning-commit-org.md) — Executed the Fable charter → **2 planning artifacts** (`docs/spec/cluster-a-data-model.md` + `docs/stage-1-build-plan.md`); steward ruled the 5 open Qs (5 ARC posts canonical · manifest-in-place · Mauss-in-slice · Python · paratext **inert/convocable** — folded as D-1…D-4; the paratext discussion yielded the **ledger=structural-accounting decoupled from FTS-token-index** insight). Then BUILT **Steps 0·1·2**: `corpus/manifest.yaml` (8 sources hash-pinned); **all 4 reading indices re-anchored + bound** as derived copies in `studium-engine/corpus/reading-indices/` — headline finding: **ALL FOUR were defective, eye-invisible, machine-surfaced** (Alexander anchor-drift + OCR; Harrison/Mauss/AtR unparseable-YAML quote-trailing typos; AtR restructured 1→6-file). Corrected my own "drift" mislabel → `corpus_findings` classed. **Step 1 = first engine code**: 8 `.meta.json` sidecars + `engine/ingest_gate.py` (§1.1 hash-bind, §4 schema, §6 bounds, §5 cleaning gate) + coverage-ledger + cleaning-rules ledger; gate **caught my own off-by-one**, verified 3 ways. Then **steward's instinct → clean at the SOURCE layer** (spec §5; makes `text_original` an honest slice): built governed **`chamber-library/scripts/clean_epub_residue.py`**; **Mauss 1254 EPUB footnotes→`[^n]`** (steward chose convert; line-preserving) + Alexander 1320 images dropped → **re-anchored**; re-bound everything; **gate now 8/8 clean**. **PULLING THREAD: resolve the reading-index canonical HOME (steward flagged CapableMind = wrong place; my lean = chamber-library, BYOC logic) + commit cleanly across 3 repos, THEN resume at Step 3 (chunker). Everything on disk, uncommitted, nothing pushed — steward's call. RESUMPTION: decide home → commit (chamber-library: 2 cleaned sources + cleaner; studium-engine: whole build; CapableMind: 2 YAML fixes, maybe moot) → Step 3.**
 
 ## Archived (2026-06-12 morning — Studium planning charter → Fable handoff)