feat(linkedin-studio): SB-S3e — retire dead content-history + read-side brain reconcile [skip-docs]

The LAST second-brain slice; the S0–S3e arc is now complete.

(b) Retire the dead, zero-reader content-history.md across its 8 plumbing
surfaces: the flaky Stop-hook writer prose, the template (git-rm'd), the
migrate-data.mjs B1 MOVE entry + its test assertions, .gitignore, the gate
SC2_CLASSES guard, the data-path ref-doc, and a session-start comment. SC1
grep = 0; migrate suite 5/5 (R8 idempotency demonstrated).

(c) `brain reconcile` — read-side triple-post reconciliation joining silo 1
(## Recent Posts, auto-tracked creation) to the silo 2↔3 graph, surfacing the
coverage gap: posts created via the plugin but never `brain ingest`-ed. New
pure core scripts/brain/src/reconcile.ts (parseRecentPosts tracks the WRITER
format state-updater.mjs:116, NOT the date-only pruner; reconcileRecentPosts
matches hook→record.body→graph for the in-graph/in-brain-only/orphaned tiers;
loadRecentPosts reads STATE_FILE via the canonical getStateFile() chain — a new
cross-seam read, the state file lives outside the brain dataRoot). Wired as the
`brain reconcile` CLI subcommand (inline parsePublishedRecord loader, not the
body-less listPublished). Read-only: never writes the state silo.

Tests (verified live): gate 99/0/0 (ASSERT floor 82→84; new Section 16f
self-test + CLI grep) · brain 127/127 (floor 114→127, +13 reconcile) · hook
suite 136/136. SC4/SC6 end-to-end run is a real behavioural pass (STATE_FILE
seam read + fallback). Honest limit: read-side cannot reconstruct un-captured
specifics/trends — auto-capture is the flagged follow-up.

Brief/plan: docs/second-brain/{brief,plan}-sb-s3e.md (fbad29d). Go-before-code
gate cleared (operator: retire · read-side · build-now).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RigJBiRFNtFZKCz21qNbQ4

docs/second-brain/architecture.md

@@ -77,7 +77,7 @@ Run on a cadence (reuse the existing session-start staleness-nudge surface) as a
 | **SB-S0 — Foundation** ✅ *landed 2026-06-23* | `brain/` scaffold + two-layer `profile.md` (fold in `user-profile.md`) + `index.md` MOC + `operations.md` + `journal/`; entity-id + provenance shape as a small typed, tested module; `ingest/` dirs + manual-import contract. **No loop yet.** Shipped as `scripts/brain/` (TS, 34 tests, gate-wired BRAIN floor); fold = P1 labeled-scalars + P2 expertise (checkbox-prefs deferred, §8 of `plan-sb-s0.md`). | Smallest thing that stands up and is testable; locks the id/provenance spine everything hangs on |
 | **SB-S1 — Ingest + gold signal** ✅ *landed 2026-06-23* | Manual import → `ingest/published/` with `provenance=published` (CLI `brain ingest`); voice-trainer wired to learn from published-only, never `ai-draft`, gate-enforced. Shipped as `scripts/brain/src/ingest.ts` + `docs/second-brain/ingest-manual-import.md` (v0.5.1). **No profile.md mutation** (SB-S2). | The gold signal before the loop that consumes it |
 | **SB-S2 — Evolution loop** ✅ *landed 2026-06-23* | Operator-invoked, operator-gated consolidation: `brain consolidate` (`--gather`/`--propose`/`--apply --confirm`) → profile **diff** w/ evidence_count/provenance/timestamps; threshold-promotion (N=3); contradiction → keep-both with distinct ids (no supersede); decay-flag (90d); `consolidation-state.json` sidecar; zero-dep session-start consolidation-due nudge + scaffold-ensure. Shipped as `scripts/brain/src/consolidate.ts` + `docs/second-brain/consolidation-loop.md` (v0.5.2). **Operator decisions:** journal deferred · no new agent (session extracts) · motor-only (no reader until S3). | The compounding mechanism |
-| **SB-S3 — Cross-silo graph + ops centre** | Thread the id through tributaries (post↔specific↔trend↔analytics assemblable); flesh out `operations.md`; retire the dead `content-history.md` + triple-post reconciliation. **S3a ✅ first reader · S3b ✅ supersede · S3c ✅ cross-silo id-threading** (hub-side: the published record carries the `specifics`/`trends` ids it was built from + a pure analytics resolver — `scripts/brain/src/assemble.ts`, `brain assemble`; tributaries untouched). **S3d ✅ ops centre** (`operations.md` is a read tributary; `strategy-advisor` honours the dated "who I am now" anchor that *deprecates older inferences* — advisory/reader-side). **S3e remains** (dead `content-history.md` retirement + triple-post post-tracking↔published↔analytics reconciliation — the loose silo S3c kept out). | Finally answers "which raw material performs?" |
+| **SB-S3 — Cross-silo graph + ops centre** | Thread the id through tributaries (post↔specific↔trend↔analytics assemblable); flesh out `operations.md`; retire the dead `content-history.md` + triple-post reconciliation. **S3a ✅ first reader · S3b ✅ supersede · S3c ✅ cross-silo id-threading** (hub-side: the published record carries the `specifics`/`trends` ids it was built from + a pure analytics resolver — `scripts/brain/src/assemble.ts`, `brain assemble`; tributaries untouched). **S3d ✅ ops centre** (`operations.md` is a read tributary; `strategy-advisor` honours the dated "who I am now" anchor that *deprecates older inferences* — advisory/reader-side). **S3e ✅ hygiene + reconciliation** (dead `content-history.md` retired across its 8 plumbing surfaces; `brain reconcile` reconciles silo 1 `## Recent Posts` ↔ the silo 2↔3 graph read-side, surfacing the coverage gap — created posts never `brain ingest`-ed; auto-capture of specifics/trends = a flagged follow-up). **The second-brain arc is complete** (S4 EØS DMA-connector optional). | Finally answers "which raw material performs?" |
 | *(later / optional)* **SB-S4** | EU/EEA DMA portability API as an auto-tributary into `ingest/inbox/` | Additive; never a dependency |
 
 ## What's genuinely hard (honest flags)