Wave 7 close-out: the embedding ledger seam dies; notes birth via mapping lines

Part 1 — the ledger + remnants interlude (master-dispatched, owner ruling
2026-09-23: nothing configures the graph beyond chat models):

- The embedding ledger surface is gone: readEmbeddings/writeEmbeddings
  ports, the EmbeddingsLedger contract, EMBEDDINGS_FILE (config, store
  impls, graphRevision source list), and graph-deletion's vector-pruning
  step. On-disk data files stay untouched (inert history).
- The extraction embedder seam dies wholesale: ExtractionPipelineDeps
  drops the embedder dep (chat-handler + backfill/import-notes stubs go
  with it), the 'embedding' phase leaves ExtractionPhase, the usage
  capture/persist helpers die, and stages.embedding leaves
  ExtractionRunUsage (historical records keep their shape — reads are
  lenient). Extraction is two stages again, like the local-embedder era.
- Consumer-less remnants: latestQuizOutcomes + QUIZ_EVENT_KINDS,
  clusterContentId, matchClusterLabelings + Community + ClusterLabeling,
  the readClusterLabels/appendClusterLabel port seams + store impls +
  LEDGER_FILES.clusterLabels. NamingRunUsage/readNamingRuns STAY
  (standing ruling — the cost pill renders historical naming spend);
  clusterHue + MIN_CLUSTER_SIZE stay (live).
- The 'labeler' role dies: BACKGROUND_MODEL_ROLES, ROLE_SLOT, ModelRole,
  the catalog pin projections, and the UI roster strings. RolePins keys
  shrink with the union.

The notes birth fallback (owner-approved 2026-09-23, surfaced by the
interlude's live smoke: production notes imports create provenance-EMPTY
nodes (importNotes passes messages: null — the file's anchor is the
mapping line), so the provenance-only birth rule left every imported
file unclustered and invisible to the prober's session list, against the
locked file-birth ruling. A provenance-empty node now births under its
FIRST mapping line's chatId (ledger order); only notes-born nodes ever
hit the fallback (chat nodes always carry provenance; a re-encountered
node's link-append re-opens the provenance rule). Deletion-safe: mapping
lines of deleted chats are stripped alongside their provenance.

Live-verified on port 3004: a fresh notes import clusters under its
src_ id with the file path as the label, end to end with no embedder.

845/845 tests, typecheck/lint/build green.
EOF
)

components/settings/agent-section.tsx

@@ -62,7 +62,7 @@ import { ModelMenuList, ThinkingMenuList } from "./model-menu";
  *  with the resolved default (owner: the hint ALWAYS names the default). */
 const SLOT_META: Record<ModelSlotName, { label: string; roster: string }> = {
 	strong: { label: "Strong", roster: "Prober + Teacher" },
-	cheap: { label: "Cheap", roster: "Researcher, demo builder, extractor, auditor, labeler" },
+	cheap: { label: "Cheap", roster: "Researcher, demo builder, extractor, auditor" },
 	vision: { label: "Vision", roster: "Visual maker + PDF reader" },
 };
 

components/setup-dialog.tsx

@@ -45,7 +45,7 @@ import type { ThinkingLevel } from "@earendil-works/pi-agent-core";
  *  section's slot rows. */
 const SLOT_META: Record<ModelSlotName, { label: string; roster: string }> = {
 	strong: { label: "Strong", roster: "Prober + Teacher" },
-	cheap: { label: "Cheap", roster: "Researcher, demo builder, extractor, auditor, labeler" },
+	cheap: { label: "Cheap", roster: "Researcher, demo builder, extractor, auditor" },
 	vision: { label: "Vision", roster: "Visual maker + PDF reader" },
 };
 const SLOT_ORDER: readonly ModelSlotName[] = ["strong", "cheap", "vision"];

config.ts

@@ -49,8 +49,7 @@ export type ModelRole =
 	| "visualMaker"
 	| "pdfReader"
 	| "extractor"
-	| "auditor"
+	| "auditor";
-	| "labeler";
 
 /**
  * The extraction pipeline (vision §1 construction): the sole graph writer.
@@ -85,8 +84,6 @@ export const LEDGER_FILES = {
 	 *  the checkpoint's replacement for chat extractions — notes keep
 	 *  sessions.jsonl, whole-file as they are). */
 	coverage: path.join(PATHS.graph, "coverage.jsonl"),
-	/** LLM-named community records (contracts/graph.ts ClusterLabeling). */
-	clusterLabels: path.join(PATHS.graph, "cluster-labels.jsonl"),
 	/** Cluster-naming run usage (contracts/graph.ts NamingRunUsage) — the
 	 *  money channel's third stage; graph-global, so its own ledger. */
 	namingRuns: path.join(PATHS.graph, "naming-runs.jsonl"),
@@ -103,12 +100,6 @@ export const SOURCES_FILE = path.join(PATHS.graph, "sources.json");
  *  Carries an updatedAt stamp for future live-physics conflict handling. */
 export const POSITIONS_FILE = path.join(PATHS.graph, "positions.json");
 
-/** The embedding ledger: one L2-normalized vector per node id, all from
- * ONE model (swapping models re-embeds everything — vectors from
- * different models live in incompatible spaces). Read-modify-write
- * JSON like positions/sources. */
-export const EMBEDDINGS_FILE = path.join(PATHS.graph, "embeddings.json");
-
 /**
  * Graph render settings (the settings-panel controls): one small JSON blob,
  * read-modify-write. Shared shape/sanitizer: src/core/render-settings.ts.

scripts/backfill-graph.ts

@@ -14,7 +14,7 @@ async function main() {
 	const only = process.argv[2]; // optional: extract just one chat id
 	const chats = only ? chatStore.listChats().filter((c) => c.id === only) : chatStore.listChats();
 	console.log(`[backfill] ${chats.length} chats to extract`);
-	const pipeline = createExtractionPipeline({ chatStore, graphStore, embedder: async () => ({ embedded: 0, total: 0, skipped: "embeddings removed (wave 7)" }) });
+	const pipeline = createExtractionPipeline({ chatStore, graphStore });
 	for (const chat of chats) {
 		const t0 = Date.now();
 		try {

scripts/import-notes.ts

@@ -27,7 +27,7 @@ async function main() {
 		.sort();
 	console.log(`[import-notes] ${files.length} note files from ${dir} (concurrency ${limit})`);
 
-	const pipeline = createExtractionPipeline({ ...stores, embedder: async () => ({ embedded: 0, total: 0, skipped: "embeddings removed (wave 7)" }) });
+	const pipeline = createExtractionPipeline(stores);
 	const queue = [...files];
 	const totals = { nodes: 0, edges: 0, events: 0, failed: 0 };
 	const workers = Array.from({ length: Math.min(limit, files.length) }, async () => {

scripts/replay-layout.ts

@@ -35,7 +35,7 @@ function main() {
 	const edges = graphStore.readEdges();
 	// The cluster source (wave 7): the birth-session partition, derived on
 	// read — same as the real settle (core/layout-settle.ts).
-	const birthClusters = birthSessionPartition(nodes);
+	const birthClusters = birthSessionPartition(nodes, graphStore.readMappings());
 
 	// Batches: each imported file, in real import order (sources.json
 	// importedAt). A node belongs to the file whose mapping first claims it

src/agent/subagents/extraction.ts

@@ -482,13 +482,11 @@ function runNotesAuditor(
 // ─── the pipeline status registry ─────────────────────────────────────────────
 
 /** The pipeline phases, in order — what the home status endpoint shows.
- *  `embedding` was its own phase (accuracy wave, 2026-09-19): the post-batch
+ *  The post-batch embedding tail was its own phase (accuracy wave,
- *  embed-re-cluster tail used to hide inside `merging`. Wave 7 stubbed the
+ *  2026-09-19) until wave 7 killed the embedder seam wholesale (this
- *  tail to a no-op — the phase survives only until Platform's
+ *  interlude) — birth-session clusters need no post-merge pass. The
- *  ledger-port interlude deletes the seam wholesale; it transitions
+ *  phases tell the truth about what the loop is actually waiting on. */
- *  instantly today. The phases must tell the truth about what the loop is
+export type ExtractionPhase = "extracting" | "auditing" | "merging";
- *  actually waiting on. */
-export type ExtractionPhase = "extracting" | "auditing" | "merging" | "embedding";
 
 /** One in-flight pipeline run. Module-level: one process, one registry.
  *  Exported for the status payload's consumer typing (the dock). */
@@ -504,13 +502,10 @@ export interface RunningExtraction {
 	phase: ExtractionPhase;
 	startedAt: number;
 	/** Live per-stage usage, accumulated as steps bill (the dock's cost /
-	 *  context-window blobs read this through /api/graph/status). Wave 6:
+	 *  context-window blobs read this through /api/graph/status). */
-	 *  the provider-embedding tail became a billable stage — recorded from
-	 *  the embedder's reported usage when present. */
 	usage: {
 		extractor?: ExtractionStageUsage;
 		auditor?: ExtractionStageUsage;
-		embedding?: ExtractionStageUsage;
 	};
 	/** True-cancellation handle (the dock's abort button): one controller per
 	 *  run, shared across phases; abort() cancels the in-flight model call. */
@@ -574,15 +569,7 @@ export interface ExtractionModels {
 	engineFor?: (role: ModelRole) => PiEngine | undefined;
 }
 
-export interface ExtractionPipelineDeps extends GraphDeps, ExtractionModels {
+export interface ExtractionPipelineDeps extends GraphDeps, ExtractionModels {}
-	/** The post-merge embedding batch — WAVE 7 STUB: the provider
-	 *  embedder and semantic clustering are dead (birth-session clusters
-	 *  + session-name labels), so production injects a no-op that
-	 *  reports skipped; tests fake writes to the (still-live) ledger
-	 *  port. The whole seam dies with Platform's ledger-port interlude
-	 *  — kept one round so that removal is a pure deletion. */
-	embedder: (graphStore: GraphStore) => Promise<unknown>;
-}
 
 export interface NotesImportInput {
 	/** The source's file path — its identity (deterministic src id) AND its
@@ -620,7 +607,7 @@ export function callUsage(usage: Usage): CallUsage {
 }
 
 export function createExtractionPipeline(deps: ExtractionPipelineDeps): ExtractionPipeline {
-	const { chatStore, graphStore, embedder: embed } = deps;
+	const { chatStore, graphStore } = deps;
 	// Stage-engine resolution: a direct test value wins; otherwise the
 	// engineFor chain (role override → slot → nothing, resolved FRESH per
 	// stage call server-side) — the job runner's exact treatment. undefined
@@ -668,35 +655,6 @@ export function createExtractionPipeline(deps: ExtractionPipelineDeps): Extracti
 		run.usage[stage]!.steps.push(usage);
 	}
 
-	/** The embedding tail's failure log (non-fatal by contract). Wave-6
-	 *  follow-up (02bd1b0): the production embedder no longer THROWS on
-	 *  embed failures (usage-on-error — landed vectors + partial usage ride
-	 *  the result), so this catch is belt-and-suspenders for injected
-	 *  embedders that still throw. */
-	function recordEmbedFailure(chatId: string): (err: unknown) => undefined {
-		return (err) => {
-			console.error(`[extraction ${chatId}] embedding failed (non-fatal):`, err);
-			return undefined;
-		};
-	}
-
-	/** Wave 6: fold the provider-embedding tail's reported usage into the
-	 *  run's capture — one ExtractionStageUsage per run (the embedder
-	 *  already aggregated its API calls into steps). Skipped embeds
-	 *  (unconfigured) carry no usage; FAILED embeds still carry the landed
-	 *  batches' steps (usage-on-error, 02bd1b0) — a mid-run failure leaves
-	 *  a three-stage run's partial embedding spend on the ledger. A run
-	 *  that embedded nothing stays two-stage, like the whole
-	 *  local-embedder era. */
-	function captureEmbedUsage(chatId: string, result: unknown): void {
-		const stage = (result as { usage?: ExtractionStageUsage } | undefined)?.usage;
-		if (!stage) return;
-		const run = runningExtractions.get(chatId);
-		if (!run) return;
-		run.usage.embedding = stage;
-	}
-
-
 	async function extract(chatId: string, view: string): Promise<SessionFindings> {
 		const signal = runningExtractions.get(chatId)?.controller.signal;
 		signal?.throwIfAborted(); // an abort during a sync gap ends the run here
@@ -771,7 +729,6 @@ export function createExtractionPipeline(deps: ExtractionPipelineDeps): Extracti
 			stages: {
 				extractor: run.usage.extractor ?? { model: "unknown", steps: [] },
 				auditor: run.usage.auditor ?? { model: "unknown", steps: [] },
-				...(run.usage.embedding ? { embedding: run.usage.embedding } : {}),
 			},
 		};
 		if (run.kind === "notes") graphStore.appendSourceUsage(chatId, entry);
@@ -856,13 +813,6 @@ export function createExtractionPipeline(deps: ExtractionPipelineDeps): Extracti
 				);
 			}
 			const stats = total;
-			// The embedding tail gets its own phase — the honest label for what
-			// the run is waiting on here (see ExtractionPhase above).
-			setPhase(chatId, "embedding", "chat");
-			// The embedding tail (wave 7 stub — see ExtractionPipelineDeps):
-			// the seam stays until Platform's ledger-port interlude; the
-			// failure contract is unchanged (non-fatal, by-result).
-			await captureEmbedUsage(chatId, await embed(graphStore).catch(recordEmbedFailure(chatId)));
 			// Option A: the layout ledger evolves with the merge (sync — the
 			// next snapshot fetch must already reflect the new nodes).
 			settleGraphLayout(graphStore);
@@ -977,12 +927,7 @@ export function createExtractionPipeline(deps: ExtractionPipelineDeps): Extracti
 			// (messages: null) — nothing to attribute, nothing to build.
 			const auditResult: AuditResult = { ...notesResult, attribution: { quiz: {} } };
 			const stats = mergeFindings(id, auditResult, { chatStore, graphStore }, { messages: null, foldedAt: input.importedAt });
-			// Same post-merge chain as the chat path: embeddings first
+			// Same post-merge settle as the chat path.
-			// (topics from meaning), then the settle, then the namer —
-			// under their own phase, exactly like the chat path.
-			setPhase(id, "embedding", "notes", input.filePath);
-			await captureEmbedUsage(id, await embed(graphStore).catch(recordEmbedFailure(id)));
-			// Option A: same post-merge settle as the chat path.
 			settleGraphLayout(graphStore);
 			persistRunUsage(id, Math.round(performance.now() - t0), stats);
 			console.info(

src/core/clusters.ts

@@ -1,71 +1,14 @@
 /**
- * CLUSTER LABEL MATCHING (vision §1). DETECTION is birth-session
+ * CLUSTER PRESENTATION RULES (vision §1). DETECTION is birth-session
  * clustering since wave 7 (core/session-clusters.ts; the semantic
- * embedder and its Louvain predecessor are both dead). What REMAINS here
+ * embedder, its Louvain predecessor, and the LLM label matcher are all
- * is the
+ * dead — labels are session names now). What remains here is the
- * cluster contract + core-survival label matching, which is
+ * one presentation rule the snapshot and the renderer share.
- * detection-agnostic: it consumes the same { members } shape semantic
- * clustering emits.
  *
- * Labelings key to sorted MEMBER SETS, never to detection indices —
+ * Browser-safe pure logic (no node builtins, no fs).
- * a labeling record outlives any reshuffle of the partition.
- *
- * Browser-safe pure logic (no node builtins, no fs): the server runs
- * matching for the snapshot payload, tests run it directly.
  */
-import type { ClusterLabeling } from "./contracts.ts";
-
-/** A detected community. Members are SORTED node ids — the member set IS
- * the identity a labeling record can outlive a reshuffle with. */
-export interface Community {
-	members: string[];
-}
 
 /** Communities below this size are not rendered, not named — presentation
  *  rule (user-decided 2026-09-13): a region of the world model needs at
  *  least three propositions to be worth a hull and a label. */
 export const MIN_CLUSTER_SIZE = 3;
-
-/**
- * Claim labeling records for detected communities — CORE-SURVIVAL (DECIDED
- * 2026-09-13): a community keeps a record's label while AT LEAST HALF of
- * the record's core survives in it (overlap * 2 >= core.length; exactly
- * half survives). Both sides are single-successor: one community holds at
- * most one label, one record is claimed by at most one community — on a
- * split, only the branch carrying the majority of the core keeps the name;
- * on a merge, the best-overlapping record wins.
- *
- * Greedy assignment by overlap size (largest first; ties broken by newer
- * record). Returns a claim (or null) per community, in input order —
- * unclaimed communities are the namer's input. Pure: same inputs, same
- * claims.
- */
-export function matchClusterLabelings(
-	communities: readonly Community[],
-	labelings: readonly ClusterLabeling[],
-): (ClusterLabeling | null)[] {
-	interface Pair {
-		community: number;
-		labeling: ClusterLabeling;
-		overlap: number;
-	}
-	const pairs: Pair[] = [];
-	communities.forEach((community, ci) => {
-		const members = new Set(community.members);
-		for (const labeling of labelings) {
-			const overlap = labeling.core.reduce((n, id) => n + (members.has(id) ? 1 : 0), 0);
-			if (overlap * 2 >= labeling.core.length && overlap > 0) {
-				pairs.push({ community: ci, labeling, overlap });
-			}
-		}
-	});
-	pairs.sort((a, b) => b.overlap - a.overlap || (a.labeling.createdAt < b.labeling.createdAt ? 1 : -1));
-	const claims: (ClusterLabeling | null)[] = communities.map(() => null);
-	const takenRecords = new Set<string>();
-	for (const pair of pairs) {
-		if (claims[pair.community] || takenRecords.has(pair.labeling.id)) continue;
-		claims[pair.community] = pair.labeling;
-		takenRecords.add(pair.labeling.id);
-	}
-	return claims;
-}

src/core/contracts/chat.ts

@@ -89,10 +89,6 @@ export interface ExtractionRunUsage {
 	stages: {
 		extractor: ExtractionStageUsage;
 		auditor: ExtractionStageUsage;
-		/** Wave 6 (2026-09-23): the provider-embedding tail — present only
-		 *  when an embedding model is configured and the run embedded
-		 *  (local embeddings were free, so this post-dates them). */
-		embedding?: ExtractionStageUsage;
 	};
 }
 

src/core/contracts/graph.ts

@@ -93,7 +93,8 @@ export interface NamingRunUsage {
 	/** ISO — wall-clock time of the run. */
 	at: string;
 	durationMs: number;
-	/** The labeler role's model id. */
+	/** The naming run's labeler role model id (the role died in wave 7;
+	 * the field stays as the historical record's shape). */
 	model: string;
 	/** Every billed call (usually ONE — the namer is single-submit). */
 	steps: CallUsage[];
@@ -323,43 +324,6 @@ export interface AuditResult {
 }
 
 /** The GET /api/graph payload — everything the home view's PURE renderer needs. */
-/** cluster-labels.jsonl line — one LLM-named community (vision §1,
- * DECIDED 2026-09-13). Append-only history: records are immutable, never
- * edited or deleted; dead labelings remain as history. IDENTITY is the
- * sorted member set ("core"), hashed into the id, so re-naming the same
- * community dedupes and a labeling survives graph edits as long as at
- * least half its core survives in some single community (core-survival;
- * under half → the community is renamed, splits can keep only one
- * successor). */
-/** The embedding ledger shape (config.EMBEDDINGS_FILE): vectors for
- *  EVERY embedded node, all produced by one model at one dimensionality. */
-export interface EmbeddingsLedger {
-	/** The embedding model id (e.g. the HF repo) — mismatch = stale
-	 *  vectors, the writer re-embeds everything. */
-	model: string;
-	/** Vector dimensionality (MRL-truncated on write). */
-	dim: number;
-	/** nodeId → L2-normalized vector (cosine similarity = dot product). */
-	vectors: Record<string, number[]>;
-	/** The topic partition over those vectors, computed by the SAME
-	 *  embedder run (the user-decided trigger: recluster at the end of
-	 *  every embedding batch, never per read — the agglomerative pass is
-	 *  ~1.5s at current scale). Consumers (snapshot, settle, namer) read
-	 *  this instead of recomputing. Empty when nothing is embedded. */
-	clusters: Array<{ members: string[] }>;
-	/** ISO timestamp of the last write. */
-	updatedAt: string;
-}
-
-export interface ClusterLabeling {
-	/** "clu_" + content hash of the sorted core. */
-	id: string;
-	/** The short domain label (1–4 words), e.g. "Differential forms". */
-	label: string;
-	/** The member node ids the label was minted for, sorted — the survival core. */
-	core: string[];
-	createdAt: string;
-}
 
 /** One rendered cluster in the snapshot payload (vision §1). Members are
  * node ids; the renderer draws the hull from member positions at draw

src/core/graph-deletion.ts

@@ -249,29 +249,5 @@ export function deleteChatTraces(graphStore: GraphStore, chatId: string, mode: C
 		graphStore.writePositions(prunedPositions);
 	}
 
-	// 6. Embeddings: prune dead vectors and dead cluster members — a dead
-	//    member in a hull list would break rendering (its position is
-	//    gone). Clusters emptied by pruning drop out; sub-minimum ones
-	//    vanish at the read-side filter. The model/dim headers stay.
-	const embeddings = graphStore.readEmbeddings();
-	const prunedVectors = Object.fromEntries(
-		Object.entries(embeddings.vectors).filter(([id]) => live.has(id) || !knownNodeIds.has(id)),
-	);
-	const prunedClusters = embeddings.clusters
-		.map((cluster) => ({ members: cluster.members.filter((id) => live.has(id) || !knownNodeIds.has(id)) }))
-		.filter((cluster) => cluster.members.length > 0);
-	if (
-		Object.keys(prunedVectors).length !== Object.keys(embeddings.vectors).length ||
-		prunedClusters.length !== embeddings.clusters.length ||
-		prunedClusters.some((c, i) => c.members.length !== embeddings.clusters[i]!.members.length)
-	) {
-		graphStore.writeEmbeddings({
-			...embeddings,
-			vectors: prunedVectors,
-			clusters: prunedClusters,
-			updatedAt: new Date().toISOString(),
-		});
-	}
-
 	return stats;
 }

src/core/graph.ts

@@ -38,7 +38,7 @@
  * adapters in.
  */
 
-import { createHash, randomBytes } from "node:crypto";
+import { randomBytes } from "node:crypto";
 import { isToolUIPart, type UIMessage } from "ai";
 import type { CoverageEntry } from "./contracts/graph.ts";
 import type {
@@ -54,7 +54,7 @@ import type {
 	UnderstandingLevel,
 } from "./contracts.ts";
 import { MIN_CLUSTER_SIZE } from "./clusters.ts";
-import { birthSessionPartition } from "./session-clusters.ts";
+import { birthMappingIndex, birthSessionOf, birthSessionPartition } from "./session-clusters.ts";
 import type { QuestionAnswerData } from "./question-core.ts";
 import type { ChatStore, GraphStore } from "./ports.ts";
 
@@ -333,16 +333,6 @@ function quizEvent(
 
 // ─── derivation (reads only — everything below is recomputable) ─────────────
 
-/** The content identity of a community: "clu_" + sha256 of the sorted
- *  member ids (12 hex). Deterministic — the same member set always mints
- *  the same id — so re-naming races and idempotent re-runs dedupe at the
- *  store seam (appendClusterLabel). Lives here (server-only core), not in
- *  clusters.ts, because clusters.ts is barrel-exported and must stay
- *  browser-safe (no node:crypto). */
-export function clusterContentId(members: readonly string[]): string {
-	return "clu_" + createHash("sha256").update([...members].sort().join("\n")).digest("hex").slice(0, 12);
-}
-
 export interface DerivedGraph {
 	nodes: GraphNode[];
 	edges: GraphEdge[];
@@ -394,34 +384,6 @@ export function getGraph(graphStore: GraphStore): DerivedGraph {
 	return { nodes: [...byId.values()], edges: merged, events: graphStore.readEvents() };
 }
 
-const QUIZ_EVENT_KINDS: ReadonlySet<string> = new Set(["correct", "miss", "dont-know"]);
-
-/**
- * The latest quiz outcome per node — a raw EVENT FACT, not a node state
- * (the transitional node-state classes were removed 2026-09-08: nothing
- * colors nodes by quiz results anymore). Its last consumer, the
- * graph-as-context selection, died in wave 7 (the injection is gone —
- * the prober reads its map through tools now); the event fact stays as
- * raw ledger truth. Nodes with no quiz events have no entry.
- */
-export function latestQuizOutcomes(nodes: GraphNode[], events: LedgerEvent[]): Map<string, LedgerEventKind> {
-	const latest = new Map<string, { at: string; kind: LedgerEventKind; index: number }>();
-	events.forEach((event, index) => {
-		if (event.nodeId === null) return;
-		if (!QUIZ_EVENT_KINDS.has(event.kind)) return;
-		const current = latest.get(event.nodeId);
-		if (!current || event.at > current.at || (event.at === current.at && index > current.index)) {
-			latest.set(event.nodeId, { at: event.at, kind: event.kind, index });
-		}
-	});
-	const out = new Map<string, LedgerEventKind>();
-	for (const node of nodes) {
-		const last = latest.get(node.id);
-		if (last) out.set(node.id, last.kind);
-	}
-	return out;
-}
-
 // ─── the /api/graph payload ──────────────────────────────────────────────────
 
 /** Everything the home graph view needs, in one fetch (shape: contracts). */
@@ -505,7 +467,7 @@ export function graphSnapshot(deps: GraphDeps): GraphSnapshot {
 	// presentation rule (a region needs >= 3 propositions for a hull). A
 	// birth session whose record is gone (deleted chat) keeps its members
 	// but renders unlabeled — honest, never guessed.
-	const communities = birthSessionPartition(nodes);
+	const communities = birthSessionPartition(nodes, deps.graphStore.readMappings());
 	const clusters: Cluster[] = communities
 		.filter((community) => community.members.length >= MIN_CLUSTER_SIZE)
 		.map((community) => ({
@@ -562,7 +524,9 @@ export interface GraphSessionEntry {
  *  first (undatable records sink, in stable id order). */
 export function graphSessionIndex(deps: GraphDeps): GraphSessionEntry[] {
 	const counts = new Map<string, number>();
-	for (const cluster of birthSessionPartition(getGraph(deps.graphStore).nodes)) {
+	const born = getGraph(deps.graphStore);
+	const mappingFallback = birthMappingIndex(deps.graphStore.readMappings());
+	for (const cluster of birthSessionPartition(born.nodes, deps.graphStore.readMappings())) {
 		counts.set(cluster.id, cluster.members.length);
 	}
 	const chats = new Map(deps.chatStore.listChats().map((chat) => [chat.id, chat]));
@@ -619,9 +583,8 @@ export interface GraphSessionProposition {
  *  ledger order (the same tie rule the snapshot's nodeObservations
  *  uses). Members sorted by node id — deterministic. */
 export function graphSessionPropositions(deps: GraphDeps, sessionId: string): GraphSessionProposition[] {
-	const born = getGraph(deps.graphStore).nodes.filter(
+	const mappingFallback = birthMappingIndex(deps.graphStore.readMappings());
-		(node) => node.provenance[0] !== undefined && node.provenance[0]!.chatId === sessionId,
+	const born = getGraph(deps.graphStore).nodes.filter((node) => birthSessionOf(node, mappingFallback) === sessionId);
-	);
 	const latest = new Map<string, { at: string; note: string; index: number }>();
 	deps.graphStore.readEvents().forEach((event, index) => {
 		if (event.kind !== "observation" || event.nodeId === null || event.chatId !== sessionId) return;

src/core/layout-settle.ts

@@ -1,7 +1,6 @@
-import type { GraphEdge, GraphNode } from "./contracts.ts";
+import type { GraphEdge, GraphNode, NodeMapping, Position } from "./contracts.ts";
 import { incrementalLayout } from "./layout.ts";
 import { birthSessionPartition } from "./session-clusters.ts";
-import type { Position } from "./contracts.ts";
 
 /**
  * The merge-time settle: recompute the resting layout from the CURRENT
@@ -20,6 +19,7 @@ import type { Position } from "./contracts.ts";
 export function settleGraphLayout(graphStore: {
 	readNodes(): GraphNode[];
 	readEdges(): GraphEdge[];
+	readMappings(): NodeMapping[];
 	readPositions(): Record<string, Position>;
 	writePositions(positions: Record<string, Position>): void;
 }): void {
@@ -39,7 +39,7 @@ export function settleGraphLayout(graphStore: {
 	// core/session-clusters.ts, wave 7) — one cluster concept everywhere.
 	// The unique list is the deduped set the partition needs (lines may
 	// repeat an id — first defines).
-	const communities = birthSessionPartition(unique);
+	const communities = birthSessionPartition(unique, graphStore.readMappings());
 	const next = incrementalLayout(unique, edges, previous, { clusters: communities });
 	graphStore.writePositions(Object.fromEntries(next));
 }

src/core/ports.ts

@@ -27,9 +27,7 @@ import type {
 	SessionCheckpoint,
 	TurnUsage,
 	NotesSource,
-	ClusterLabeling,
 	NamingRunUsage,
-	EmbeddingsLedger,
 } from "./contracts.ts";
 import type { UserSettings } from "./settings.ts";
 
@@ -102,11 +100,6 @@ export interface GraphStore {
 	appendCoverage(entry: CoverageEntry): void;
 	readCoverage(): CoverageEntry[];
 
-	/** Append one cluster labeling — idempotent by id (the id hashes the
-	 *  sorted core, so identical member sets dedupe). */
-	appendClusterLabel(labeling: ClusterLabeling): void;
-	readClusterLabels(): ClusterLabeling[];
-
 	/** Append one cluster-naming run's usage (graph-global money channel) —
 	 *  idempotent per startedAt. */
 	appendNamingUsage(entry: NamingRunUsage): void;
@@ -128,16 +121,6 @@ export interface GraphStore {
 	/** Replace the whole ledger (the settle is a full-graph computation). */
 	writePositions(positions: Record<string, Position>): void;
 
-	/** The embeddings ledger (config.EMBEDDINGS_FILE) — INERT DATA since
-	 *  wave 7 (owner ruling 2026-09-23: the provider embedder is dead;
-	 *  clustering is birth-session, labels are session names; the
-	 *  graph-context injection is gone with it). The whole seam dies in
-	 *  the follow-up interlude; graph-deletion's vector pruning is
-	 *  harmless housekeeping meanwhile. */
-	readEmbeddings(): EmbeddingsLedger;
-	/** Replace the whole ledger (graph-deletion's vector pruning only). */
-	writeEmbeddings(ledger: EmbeddingsLedger): void;
-
 	/** THE DESTRUCTIVE SEAM (session-deletion wave 6, owner 2026-09-22 —
 	 *  the first non-append operation on these ledgers): atomically
 	 *  replace the full contents of any subset of the six rewritable

src/core/session-clusters.ts

@@ -21,14 +21,24 @@
  *
  * Notes imports are birth-sessions too (owner ruling 2026-09-23): their
  * nodes carry a "src_…" source id instead of a chat id; the caller labels
- * them with the file's path (kind: file in the session views).
+ * them with the file's path (kind: file in the session views). The
+ * mapping-line fallback (owner-approved 2026-09-23, surfaced by the
+ * interlude's live smoke): production notes imports create provenance-
+ * EMPTY nodes (the notes front door passes messages: null — the file's
+ * anchor is the mapping line), so a provenance-empty node's birth session
+ * is its FIRST mapping line's chatId in ledger order. Only notes-born
+ * nodes ever hit the fallback — chat extraction always writes provenance
+ * points, and a re-encountered node's link-append adds one, which
+ * re-opens the provenance rule above. Deletion-safe: a deleted chat's
+ * mapping lines are stripped alongside its provenance; notes mappings
+ * survive because files are never deleted.
  *
  * Browser-safe pure logic (no node builtins, no fs): same contract style
  * as the rest of the core graph derivation. Not re-exported through the
  * core barrel — the shell reads clusters from the snapshot; only the
  * server-side derivations (snapshot, settle) and tests import this.
  */
-import type { GraphNode } from "./contracts.ts";
+import type { GraphNode, NodeMapping } from "./contracts.ts";
 
 /** One birth-session cluster: the session id + the SORTED member node
  *  ids born in it. The shape is deliberately the { members } contract
@@ -41,11 +51,23 @@ export interface BirthSessionCluster {
 	members: string[];
 }
 
-/** A node's birth session: its first surviving provenance point's chatId,
+/** A node's birth session: its first surviving provenance point's chatId;
- *  or null when the node carries no provenance at all (unclustered). */
+ *  for a provenance-empty node, its first mapping line's chatId (the notes
-export function birthSessionOf(node: GraphNode): string | null {
+ *  fallback — see the module doc). null when neither exists. */
+export function birthSessionOf(node: GraphNode, mappingFallback?: ReadonlyMap<string, string>): string | null {
 	const first = node.provenance[0];
-	return first === undefined ? null : first.chatId;
+	if (first !== undefined) return first.chatId;
+	return mappingFallback?.get(node.id) ?? null;
+}
+
+/** The notes fallback index: nodeId → the chatId of the node's FIRST
+ *  mapping line in ledger order. */
+export function birthMappingIndex(mappings: readonly NodeMapping[]): Map<string, string> {
+	const index = new Map<string, string>();
+	for (const mapping of mappings) {
+		if (!index.has(mapping.graphNodeId)) index.set(mapping.graphNodeId, mapping.chatId);
+	}
+	return index;
 }
 
 /**
@@ -53,15 +75,20 @@ export function birthSessionOf(node: GraphNode): string | null {
  * (first line defines — the getGraph rule), groups by birth session, and
  * returns the groups size-desc with members sorted (deterministic output:
  * ties break by session id ascending). Nodes with no surviving provenance
- * are left unclustered — they belong to no session the graph can name.
+ * fall back to their first mapping line (notes-born); a node with neither
+ * is left unclustered — it belongs to no session the graph can name.
  */
-export function birthSessionPartition(nodes: readonly GraphNode[]): BirthSessionCluster[] {
+export function birthSessionPartition(
+	nodes: readonly GraphNode[],
+	mappings: readonly NodeMapping[] = [],
+): BirthSessionCluster[] {
+	const mappingFallback = birthMappingIndex(mappings);
 	const members = new Map<string, string[]>();
 	const seen = new Set<string>();
 	for (const node of nodes) {
 		if (seen.has(node.id)) continue;
 		seen.add(node.id);
-		const birth = birthSessionOf(node);
+		const birth = birthSessionOf(node, mappingFallback);
 		if (birth === null) continue;
 		const bucket = members.get(birth);
 		if (bucket) bucket.push(node.id);

src/core/settings.ts

@@ -45,7 +45,6 @@ export const BACKGROUND_MODEL_ROLES = [
 	"visualMaker",
 	"extractor",
 	"auditor",
-	"labeler",
 ] as const;
 
 export type BackgroundModelRole = (typeof BACKGROUND_MODEL_ROLES)[number];
@@ -64,7 +63,7 @@ export interface RoleModelOverride {
 /** The capability tiers a user can pin models into (owner-settled mapping):
  *  strong = prober + teacher (also the per-session default-teacher
  *  starting point); cheap = researcher, demo-builder, extractor, auditor,
- *  labeler; vision = visual-maker + pdf-reader. Resolution per role:
+; vision = visual-maker + pdf-reader. Resolution per role:
  *  ROLE OVERRIDE → slot → factory pin. */
 export const MODEL_SLOTS = ["strong", "cheap", "vision"] as const;
 export type ModelSlotName = (typeof MODEL_SLOTS)[number];
@@ -174,7 +173,6 @@ export const ROLE_SLOT: Readonly<Record<ModelRole, ModelSlotName>> = {
 	demoBuilder: "cheap",
 	extractor: "cheap",
 	auditor: "cheap",
-	labeler: "cheap",
 	visualMaker: "vision",
 	pdfReader: "vision",
 };

src/server/chat-handler.ts

@@ -61,11 +61,6 @@ const jobRunner = createJobRunner({
  *  (/api/graph/import) hit the same single-flight registry. */
 export const extraction = createExtractionPipeline({
 	...stores,
-	// Wave 7 (owner ruling 2026-09-23): embeddings are DEAD — the pipeline's
-	// embed seam becomes a no-op until Teacher's pass removes the phase
-	// outright. Nothing embedded, nothing spent, the ledger untouched
-	// (its data is inert anyway: nothing reads it but the dying injection).
-	embedder: async () => ({ embedded: 0, total: 0, skipped: "embeddings removed (wave 7)" }),
 	// BYOK (owner, 2026-09-22): the extraction stages resolve the chain —
 	// role override → slot → NOTHING — read FRESH per stage call; an empty
 	// chain flows through as undefined and the pipeline refuses the run

src/server/graph.ts

@@ -1,5 +1,5 @@
 import * as fs from "node:fs";
-import { EMBEDDINGS_FILE, LEDGER_FILES, POSITIONS_FILE } from "../../config.ts";
+import { LEDGER_FILES, POSITIONS_FILE } from "../../config.ts";
 import type { GraphSnapshot } from "../core/contracts.ts";
 import type { GraphCostSummary } from "../core/cost-summary.ts";
 import { graphCostSummary } from "../core/cost-summary.ts";
@@ -54,10 +54,8 @@ export function graphRevision(): number {
 		LEDGER_FILES.mappings,
 		LEDGER_FILES.sessions,
 		LEDGER_FILES.coverage,
-		LEDGER_FILES.clusterLabels,
 		LEDGER_FILES.namingRuns,
 		POSITIONS_FILE,
-		EMBEDDINGS_FILE,
 	]) {
 		try {
 			revision = Math.max(revision, fs.statSync(file).mtimeMs);

src/server/model-catalog.ts

@@ -87,7 +87,7 @@ export function rolePinsFor(
 	return pins;
 }
 
-/** The six background roles' RESOLVED pins: the user's agent-models
+/** The background roles' RESOLVED pins: the user's agent-models
  *  override → tier slot → nothing — the same resolution the agent wiring
  *  uses (src/server/stores.ts effectiveSettings), so the caption can
  *  never drift from what actually runs. */

src/store/graph.ts

@@ -29,10 +29,8 @@
 
 import * as fs from "node:fs";
 import * as path from "node:path";
-import { EMBEDDINGS_FILE, LEDGER_FILES, POSITIONS_FILE, SOURCES_FILE } from "../../config.ts";
+import { LEDGER_FILES, POSITIONS_FILE, SOURCES_FILE } from "../../config.ts";
 import type {
-	ClusterLabeling,
-	EmbeddingsLedger,
 	GraphEdge,
 	GraphNode,
 	ExtractionRunUsage,
@@ -104,14 +102,6 @@ const isNamingRun = (v: unknown): v is NamingRunUsage =>
 	Array.isArray(v.steps) &&
 	isNamingStats(v.stats);
 
-const isClusterLabeling = (v: unknown): v is ClusterLabeling =>
-	isRecord(v) &&
-	isString(v.id) &&
-	isString(v.label) &&
-	Array.isArray(v.core) &&
-	v.core.every(isString) &&
-	isString(v.createdAt);
-
 const isGraphNode = (v: unknown): v is GraphNode =>
 	isRecord(v) &&
 	isString(v.id) &&
@@ -200,18 +190,6 @@ export const graphStore: GraphStore = {
 		return readValid(LEDGER_FILES.coverage, isCoverageEntry);
 	},
 
-	// ── cluster labelings (config.LEDGER_FILES.clusterLabels) ──
-
-	/** Idempotent by id: the id is a hash of the sorted core, so re-appending
-	 *  the same member set (re-naming races, idempotent re-runs) is a no-op. */
-	appendClusterLabel(labeling: ClusterLabeling): void {
-		if (this.readClusterLabels().some((l) => l.id === labeling.id)) return;
-		appendLine(LEDGER_FILES.clusterLabels, labeling);
-	},
-	readClusterLabels(): ClusterLabeling[] {
-		return readValid(LEDGER_FILES.clusterLabels, isClusterLabeling);
-	},
-
 	// ── cluster-naming run usage (config.LEDGER_FILES.namingRuns) ──
 
 	/** Idempotent per startedAt — the same discipline as every usage
@@ -254,12 +232,6 @@ export const graphStore: GraphStore = {
 	writePositions(positions: Record<string, Position>): void {
 		writePositionMap(positions);
 	},
-	readEmbeddings(): EmbeddingsLedger {
-		return readEmbeddingsLedger();
-	},
-	writeEmbeddings(ledger: EmbeddingsLedger): void {
-		writeEmbeddingsLedger(ledger);
-	},
 
 	/** THE DESTRUCTIVE SEAM (wave 6 session deletion): atomic full-content
 	 *  replacement per provided ledger — write a uniquely-named temp file
@@ -339,57 +311,6 @@ function writePositionMap(positions: Record<string, Position>): void {
 	);
 }
 
-/** embeddings.json — the whole EmbeddingsLedger at once. Missing/corrupt
- *  file reads as an EMPTY ledger (model "") so consumers see "nothing
- *  embedded yet" rather than an error; the embedder backfills. */
-function readEmbeddingsLedger(): EmbeddingsLedger {
-	let raw: string;
-	try {
-		raw = fs.readFileSync(EMBEDDINGS_FILE, "utf-8");
-	} catch {
-		return { model: "", dim: 0, vectors: {}, clusters: [], updatedAt: "" };
-	}
-	try {
-		const parsed: unknown = JSON.parse(raw);
-		if (!isRecord(parsed)) return { model: "", dim: 0, vectors: {}, clusters: [], updatedAt: "" };
-		const model = typeof parsed.model === "string" ? parsed.model : "";
-		const dim = typeof parsed.dim === "number" && Number.isFinite(parsed.dim) ? parsed.dim : 0;
-		const vectors: Record<string, number[]> = {};
-		if (isRecord(parsed.vectors)) {
-			for (const [id, value] of Object.entries(parsed.vectors)) {
-				if (
-					Array.isArray(value) &&
-					value.length > 0 &&
-					value.every((x) => typeof x === "number" && Number.isFinite(x))
-				) {
-					vectors[id] = value as number[];
-				}
-			}
-		}
-		const clusters: Array<{ members: string[] }> = [];
-		if (Array.isArray(parsed.clusters)) {
-			for (const c of parsed.clusters) {
-				if (
-					isRecord(c) &&
-					Array.isArray(c.members) &&
-					c.members.length > 0 &&
-					c.members.every((m) => typeof m === "string")
-				) {
-					clusters.push({ members: [...(c.members as string[])] });
-				}
-			}
-		}
-		return { model, dim, vectors, clusters, updatedAt: typeof parsed.updatedAt === "string" ? parsed.updatedAt : "" };
-	} catch {
-		return { model: "", dim: 0, vectors: {}, clusters: [], updatedAt: "" };
-	}
-}
-
-function writeEmbeddingsLedger(ledger: EmbeddingsLedger): void {
-	fs.mkdirSync(path.dirname(EMBEDDINGS_FILE), { recursive: true });
-	fs.writeFileSync(EMBEDDINGS_FILE, JSON.stringify(ledger, null, "\t"), "utf-8");
-}
-
 const isPosition = (v: unknown): v is Position =>
 	isRecord(v) && typeof v.x === "number" && Number.isFinite(v.x) && typeof v.y === "number" && Number.isFinite(v.y);
 

tests/clusters.test.ts

@@ -1,73 +1,16 @@
 /**
- * Community detection tests (vision §1, DECIDED 2026-09-13) — pure
+ * Cluster presentation-rule tests. Wave 7 killed the semantic detection
- * structural Louvain over follows+supports, deterministic via seed.
+ * AND the LLM label matcher (birth-session clusters, session-name labels —
- * Assertions are on SHAPE and MEMBER SETS, never community indices
+ * core/session-clusters.ts has its own suite); what remains pinned here
- * (indices reshuffle; member sets are what labelings key to).
+ * is the render threshold and the hull-color spread the UI leans on.
  */
 import { strict as assert } from "node:assert";
 import { describe, test } from "node:test";
-import { matchClusterLabelings, MIN_CLUSTER_SIZE, type Community } from "../src/core/clusters.ts";
+import { MIN_CLUSTER_SIZE } from "../src/core/clusters.ts";
 import { clusterHue } from "../components/cluster-geometry.ts";
-import type { ClusterLabeling } from "../src/core/contracts.ts";
 
-const ids = (n: number, prefix = "n") => [...Array(n).keys()].map((i) => `${prefix}${i}`);
+describe("MIN_CLUSTER_SIZE", () => {
-
+	test("is 3 (the render threshold — below this, no hull)", () => {
-/** A clique on the given ids. */
-const clique = (nodeIds: string[]) =>
-	nodeIds.flatMap((a, i) => nodeIds.slice(i + 1).map((b) => ({ from: a, to: b })));
-
-const labeling = (id: string, core: string[], createdAt = "2026-09-01T00:00:00.000Z"): ClusterLabeling => ({
-	id,
-	label: `label-${id}`,
-	core,
-	createdAt,
-});
-
-describe("matchClusterLabelings", () => {
-	test("claims a labeling while at least half its core survives in the community", () => {
-		const community: Community = { members: ["a", "b", "c", "d", "e"] };
-		const records = [labeling("clu_1", ["a", "b", "x", "y"])]; // 2 of 4 survive — exactly half
-		const [claim] = matchClusterLabelings([community], records);
-		assert.equal(claim?.id, "clu_1");
-		// One fewer survivor: under half → relabel.
-		const [dead] = matchClusterLabelings([{ members: ["a", "c", "d", "e", "f"] }], records);
-		assert.equal(dead, null);
-	});
-
-	test("single successor: a split core keeps its label in only one community", () => {
-		const records = [labeling("clu_1", ["a", "b", "c", "d"])];
-		const left: Community = { members: ["a", "b", "z"] }; // 2 of 4 — half
-		const right: Community = { members: ["c", "d", "w"] }; // 2 of 4 — half
-		// Tie: larger overlap wins; equal → both eligible, greedy takes first come.
-		const claims = matchClusterLabelings([left, right], records);
-		const claimed = claims.filter((c) => c !== null);
-		assert.equal(claimed.length, 1);
-		assert.equal(claimed[0]?.id, "clu_1");
-	});
-
-	test("greedy: the best-overlapping community wins the record", () => {
-		const records = [labeling("clu_1", ["a", "b", "c", "d"])];
-		const weak: Community = { members: ["a", "b", "q", "r", "s"] }; // 2/4
-		const strong: Community = { members: ["a", "b", "c", "x", "y"] }; // 3/4
-		const claims = matchClusterLabelings([weak, strong], records);
-		assert.equal(claims[0], null);
-		assert.equal(claims[1]?.id, "clu_1");
-	});
-
-	test("one record per community; newest record breaks ties", () => {
-		const oldR = labeling("clu_old", ["a", "b"], "2026-09-01T00:00:00.000Z");
-		const newR = labeling("clu_new", ["a", "b"], "2026-09-02T00:00:00.000Z");
-		const community: Community = { members: ["a", "b", "c"] };
-		const [claim] = matchClusterLabelings([community], [oldR, newR]);
-		assert.equal(claim?.id, "clu_new");
-	});
-
-	test("no labelings: every community unclaimed; empty communities array ok", () => {
-		assert.deepEqual(matchClusterLabelings([{ members: ["a", "b"] }], []), [null]);
-		assert.deepEqual(matchClusterLabelings([], [labeling("clu_1", ["a"])]), []);
-	});
-
-	test("MIN_CLUSTER_SIZE is 3 (the render/naming threshold)", () => {
 		assert.equal(MIN_CLUSTER_SIZE, 3);
 	});
 });
@@ -82,4 +25,3 @@ describe("clusterHue", () => {
 		for (const h of hues) assert.ok(h >= 0 && h < 360);
 	});
 });
-

tests/extraction.test.ts

@@ -27,7 +27,6 @@ import type { UIMessage } from "ai";
 import type { PiEngine } from "../src/agent/models.ts";
 import type {
 	AuditResult,
-	ClusterLabeling,
 	CoverageEntry,
 	ExtractionRunUsage,
 	GraphEdge,
@@ -69,17 +68,9 @@ function memoryLedgers() {
 	const checkpoints: SessionCheckpoint[] = [];
 	const coverage: CoverageEntry[] = [];
 	const sources = new Map<string, NotesSource>();
-	const clusterLabels: ClusterLabeling[] = [];
+		const namingRuns: NamingRunUsage[] = [];
-	const namingRuns: NamingRunUsage[] = [];
 	const positions = new Map<string, { x: number; y: number }>();
-	const embeddings = {
+		return {
-		model: "",
-		dim: 0,
-		updatedAt: "",
-		vectors: new Map<string, number[]>(),
-		clusters: new Array<Array<string>>(),
-	};
-	return {
 		appendNode: (n: GraphNode) => void nodes.push(n),
 		readNodes: () => nodes.map((n) => ({ ...n })),
 		appendEdge: (e: GraphEdge) => void edges.push(e),
@@ -108,10 +99,6 @@ function memoryLedgers() {
 			}
 		},
 		// Cluster labelings — mirrors the real store: append dedupes by id.
-		appendClusterLabel: (l: ClusterLabeling) => {
-			if (!clusterLabels.some((x) => x.id === l.id)) clusterLabels.push(l);
-		},
-		readClusterLabels: () => clusterLabels.map((l) => ({ ...l, core: [...l.core] })),
 		// Cluster-naming run usage — mirrors the real store: dedupe per startedAt.
 		appendNamingUsage: (entry: NamingRunUsage) => {
 			if (!namingRuns.some((r) => r.startedAt === entry.startedAt)) namingRuns.push(entry);
@@ -123,16 +110,6 @@ function memoryLedgers() {
 			positions.clear();
 			for (const [id, p] of Object.entries(next)) positions.set(id, { x: p.x, y: p.y });
 		},
-		// The embedding ledger — the embedder writes it after a merge.
-		readEmbeddings: () => ({ model: embeddings.model, dim: embeddings.dim, vectors: Object.fromEntries([...embeddings.vectors].map(([id, v]) => [id, [...v]])), clusters: [...embeddings.clusters.map((c) => ({ members: [...c] }))], updatedAt: embeddings.updatedAt }),
-		writeEmbeddings: (next) => {
-			embeddings.model = next.model;
-			embeddings.dim = next.dim;
-			embeddings.updatedAt = next.updatedAt;
-			embeddings.vectors.clear();
-			for (const [id, v] of Object.entries(next.vectors)) embeddings.vectors.set(id, [...v]);
-			embeddings.clusters = next.clusters.map((c) => [...c.members]);
-		},
 		// The destructive seam (wave 6 session deletion) — mirrors the real
 		// store: replace the provided ledgers' full contents.
 		rewriteLedgers: (next) => {
@@ -360,7 +337,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", FINDINGS),
 			auditor: submitModel("submit_review", verdict),
 		});
@@ -414,7 +390,7 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const { chatId } = fixtureChat();
 		const ledgers = memoryLedgers();
 		// No direct engines AND no engineFor — the chain came up empty.
-		const pipeline = createExtractionPipeline({ chatStore, graphStore: ledgers, embedder: fakeEmbedder });
+		const pipeline = createExtractionPipeline({ chatStore, graphStore: ledgers });
 		await assert.rejects(pipeline.runExtraction(chatId), (err: unknown) => {
 			assert.ok(err instanceof ModelsNotConfiguredError);
 			assert.deepEqual(err.envelope.missing, ["cheap"]); // extractor + auditor are the cheap tier
@@ -438,7 +414,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", FINDINGS),
 			auditor: submitModel("submit_review", verdict),
 		});
@@ -448,7 +423,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		// so the post-merge naming garnish is gone — no model spend, no
 		// naming-run records, no label writes.
 		assert.equal(ledgers.readNamingRuns().length, 0, "no naming runs minted");
-		assert.equal(ledgers.readClusterLabels().length, 0, "no label records appended");
 	});
 
 
@@ -466,7 +440,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			// NO direct values — the stages resolve ENTIRELY through engineFor
 			// (the role override → slot → factory-pin chain, read fresh per
 			// stage call in production; here, the scripted chain).
@@ -498,7 +471,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", FINDINGS),
 			auditor: submitModel("submit_review", verdict),
 			// If the direct values did NOT win, this throw would surface.
@@ -517,7 +489,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", FINDINGS),
 			auditor: silentModel(), // never submits the review
 		});
@@ -528,7 +499,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const failingExtractor = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: silentModel(),
 			auditor: submitModel("submit_review", { ...FINDINGS, dropped: [] }),
 		});
@@ -559,7 +529,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			// Each stage's first generate is the observation point: the
 			// registry must already carry this chat at the right phase.
 			extractor: submitModel("submit_findings", FINDINGS, () => seen.push(phaseOf())),
@@ -570,48 +539,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		assert.equal(extractionStatuses().length, 0, "the registry clears when the run ends");
 	});
 
-	it("labels the post-batch embedding tail as its own phase — not 'merging' (2026-09-19 accuracy fix)", async () => {
-		const { chatId } = fixtureChat();
-		const ledgers = memoryLedgers();
-		// Gate the embedder so we can observe the registry WHILE the tail
-		// runs — mergeFindings has already returned, every batch is merged.
-		let releaseEmbed!: () => void;
-		const embedGate = new Promise<void>((resolve) => {
-			releaseEmbed = resolve;
-		});
-		let observed: string | undefined;
-		const gatedEmbedder = async (store: GraphStore) => {
-			await embedGate;
-			observed = extractionStatuses().find((r) => r.chatId === chatId)?.phase;
-			await fakeEmbedder(store);
-		};
-		const verdict: AuditResult = { propositions: FINDINGS.propositions, edges: [], attribution: { quiz: {} }, dropped: [] };
-		const pipeline = createExtractionPipeline({
-			chatStore,
-			graphStore: ledgers,
-			embedder: gatedEmbedder,
-			extractor: submitModel("submit_findings", FINDINGS),
-			auditor: submitModel("submit_review", verdict),
-		});
-		const run = pipeline.runExtraction(chatId);
-		// Wait for the tail: the phase must flip to "embedding" while the
-		// embedder hangs — the incident this fixes is minutes of "merging"
-		// AFTER the last merge, so the flip itself is the assertion.
-		const t0 = Date.now();
-		while (extractionStatuses().find((r) => r.chatId === chatId)?.phase !== "embedding") {
-			if (Date.now() - t0 > 2000) {
-				releaseEmbed();
-				await run;
-				assert.fail("the tail never flipped to embedding (stuck at 'merging'?)");
-			}
-			await new Promise((r) => setTimeout(r, 10));
-		}
-		releaseEmbed();
-		await run;
-		assert.equal(observed, "embedding", "still embedding through the tail, never back to 'merging'");
-		assert.equal(extractionStatuses().length, 0, "clears when done");
-	});
-
 	it("captures per-stage usage live, persists the run's usage into the chat record", async () => {
 		const { chatId } = fixtureChat();
 		const ledgers = memoryLedgers();
@@ -634,7 +561,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			// During the auditor's generate, the registry must already carry
 			// the extractor's fully accumulated live usage (2 steps × 10/5).
 			extractor: submitModel("submit_findings", FINDINGS),
@@ -676,7 +602,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: hangingModel(), // hangs until aborted — no step finishes
 			auditor: submitModel("submit_review", { propositions: [], edges: [], attribution: { quiz: {} }, dropped: [] }),
 		});
@@ -727,7 +652,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: gatedExtractor,
 			auditor: silentModel(),
 		});
@@ -761,7 +685,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: gatedExtractor,
 			auditor: silentModel(),
 		});
@@ -771,7 +694,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const observer = createExtractionPipeline({
 			chatStore,
 			graphStore: memoryLedgers(),
-			embedder: fakeEmbedder,
 			extractor: silentModel(),
 			auditor: silentModel(),
 		});
@@ -798,7 +720,6 @@ describe("the extraction pipeline (extractor → auditor → merger)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: silentModel(),
 			auditor: silentModel(),
 		});
@@ -838,28 +759,6 @@ const NOTES_VERDICT = {
 	dropped: [],
 } as const;
 
-/** Test seam for the embedder: semantic clustering died with wave 7
- *  (birth-session clusters + session-name labels), so the production
- *  embedder is a no-op stub pending Platform's ledger-port removal —
- *  this fake mirrors it: one identical vector per node persisted to the
- *  (still-live) embeddings ledger port, no clusters computed. */
-const fakeEmbedder = async (store: GraphStore) => {
-	const seen = new Set<string>();
-	const ids: string[] = [];
-	for (const n of store.readNodes()) {
-		if (seen.has(n.id)) continue;
-		seen.add(n.id);
-		ids.push(n.id);
-	}
-	store.writeEmbeddings({
-		model: "test/embedder",
-		dim: 3,
-		vectors: Object.fromEntries(ids.map((id) => [id, [1, 0, 0]])),
-		clusters: [],
-		updatedAt: "2026-09-13T00:00:00.000Z",
-	});
-};
-
 describe("the notes front door (importNotes — format-agnostic)", () => {
 	it("imports raw notes end to end: source record, file-scoped provenance, no quiz events", async () => {
 		const ledgers = memoryLedgers();
@@ -867,7 +766,6 @@ describe("the notes front door (importNotes — format-agnostic)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", NOTES_FINDINGS),
 			// During the auditor's call the registry must show the notes run.
 			auditor: submitModel("submit_review", NOTES_VERDICT, () => {
@@ -915,8 +813,7 @@ describe("the notes front door (importNotes — format-agnostic)", () => {
 			createExtractionPipeline({
 				chatStore,
 				graphStore: ledgers,
-				embedder: fakeEmbedder,
+					extractor: submitModel("submit_findings", NOTES_FINDINGS),
-				extractor: submitModel("submit_findings", NOTES_FINDINGS),
 				auditor: submitModel("submit_review", NOTES_VERDICT),
 			});
 		const first = await mk().importNotes({ filePath: "/vault/learn vim.md", text: NOTES_TEXT });
@@ -935,7 +832,6 @@ describe("the notes front door (importNotes — format-agnostic)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: hangingModel(),
 			auditor: submitModel("submit_review", NOTES_VERDICT),
 		});
@@ -1017,7 +913,6 @@ describe("the chunked pipeline (extraction coverage)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: fauxEngine([findingsStep((v) => views.push(v)), findingsStep((v) => views.push(v))]),
 			auditor: fauxEngine([passThroughAuditStep(), passThroughAuditStep()]),
 		});
@@ -1059,7 +954,6 @@ describe("the chunked pipeline (extraction coverage)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			// Batch 1 submits and merges; batch 2's extractor call HANGS
 			// until the abort fires — the dock's abort button, mid-run.
 			extractor: fauxEngine([
@@ -1103,7 +997,6 @@ describe("the chunked pipeline (extraction coverage)", () => {
 		const finisher = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: fauxEngine([findingsStep((v) => reRunViews.push(v))]),
 			auditor: fauxEngine([passThroughAuditStep()]),
 		});
@@ -1125,7 +1018,6 @@ describe("the chunked pipeline (extraction coverage)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: fauxEngine([findingsStep()]),
 			auditor: fauxEngine([passThroughAuditStep()]),
 		});
@@ -1157,7 +1049,6 @@ describe("the chunked pipeline (extraction coverage)", () => {
 		const reOpener = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: fauxEngine([findingsStep((v) => reRunViews.push(v))]),
 			auditor: fauxEngine([passThroughAuditStep()]),
 		});
@@ -1180,7 +1071,6 @@ describe("the session-deletion guard (chat deleted mid-run)", () => {
 		const pipeline = createExtractionPipeline({
 			chatStore,
 			graphStore: ledgers,
-			embedder: fakeEmbedder,
 			extractor: submitModel("submit_findings", FINDINGS),
 			auditor: submitModel("submit_review", { propositions: FINDINGS.propositions, edges: [], attribution: { quiz: {} }, dropped: [] }, () => chatStore.deleteChat(chatId)),
 		});

tests/graph-tools.test.ts

@@ -57,8 +57,6 @@ function fakeStores(
 		readSources: () => [],
 		readPositions: () => ({}),
 		writePositions: () => {},
-		readEmbeddings: () => ({ model: "dead", dim: 0, vectors: {}, clusters: [], updatedAt: "" }),
-		writeEmbeddings: () => {},
 		readClusterLabels: () => [],
 		appendClusterLabel: () => {},
 		appendNamingRun: () => {},

tests/graph.test.ts

@@ -23,7 +23,7 @@ import type { QuestionAnswerData } from "../src/core/question-core.ts";
 import { getGraph, graphSnapshot, mergeFindings, type GraphDeps } from "../src/core/graph.ts";
 import { graphStore } from "../src/store/graph.ts";
 import { chatStore } from "../src/store/chats.ts";
-import { LEDGER_FILES, PATHS, SOURCES_FILE, EMBEDDINGS_FILE } from "../config.ts";
+import { LEDGER_FILES, PATHS, SOURCES_FILE } from "../config.ts";
 
 /** The wired fs adapters, exactly what src/server/stores.ts passes in production. */
 const graphDeps = { chatStore, graphStore } as const satisfies GraphDeps;
@@ -38,9 +38,7 @@ function sessionSource(chatId: string): { messages: UIMessage[]; foldedAt: strin
 
 // ─── ledger isolation (backup-and-clear of data/graph/*.jsonl) ──────────────
 
-// EMBEDDINGS_FILE too: the semantic-cluster source (read by graphSnapshot)
+const LEDGER_PATHS = [...Object.values(LEDGER_FILES), SOURCES_FILE];
-// — isolated like the rest so this suite never touches the real vectors.
-const LEDGER_PATHS = [...Object.values(LEDGER_FILES), SOURCES_FILE, EMBEDDINGS_FILE];
 const backups: Array<{ file: string; bak: string }> = [];
 const createdChats: string[] = [];
 
@@ -681,21 +679,14 @@ describe("session deletion (deleteChatTraces + deleteChatSession, wave 6)", () =
 		mergeFindings(dB.id, auditB, graphDeps, sessionSource(dB.id));
 		const zId = graphStore.readMappings().find((m) => m.chatId === dB.id && m.sourceId === "q2")!.graphNodeId;
 
-		// Coverage rows (both chats) + positions + embeddings garnish — the
+		// Coverage rows (both chats) + positions garnish — the deletion
-		// deletion prunes all three ledgers.
+		// prunes both ledgers.
 		for (const chat of [dA, dB]) {
 			for (let i = 0; i < 2; i++) {
 				graphStore.appendCoverage({ chatId: chat.id, fp: `${chat.id}-${i}`, tokens: 10, foldedAt: "2026-09-23T00:02:00.000Z" });
 			}
 		}
 		graphStore.writePositions({ ...graphStore.readPositions(), [xId]: { x: 1, y: 1 }, [yId]: { x: 2, y: 2 }, [zId]: { x: 3, y: 3 } });
-		const emb = graphStore.readEmbeddings();
-		graphStore.writeEmbeddings({
-			...emb,
-			vectors: { ...emb.vectors, [xId]: [1, 0], [yId]: [0, 1], [zId]: [1, 1] },
-			clusters: [...emb.clusters, { members: [xId, yId, zId] }],
-			updatedAt: "2026-09-23T00:03:00.000Z",
-		});
 		return { dA, dB, xId, yId, zId };
 	}
 
@@ -738,14 +729,10 @@ describe("session deletion (deleteChatTraces + deleteChatSession, wave 6)", () =
 		// Mappings: dA's audit trail died; dB's stays.
 		const mappings = graphStore.readMappings().filter((m) => [dA.id, dB.id].includes(m.chatId));
 		assert.deepEqual(mappings, [{ chatId: dB.id, sourceId: "q1", graphNodeId: xId }, { chatId: dB.id, sourceId: "q2", graphNodeId: zId }]);
-		// Positions/embeddings: the orphan pruned everywhere.
+		// Positions: the orphan pruned.
 		const positions = graphStore.readPositions();
 		assert.equal(positions[yId], undefined);
 		assert.deepEqual(positions[xId], { x: 1, y: 1 });
-		const emb = graphStore.readEmbeddings();
-		assert.equal(emb.vectors[yId], undefined);
-		assert.ok(emb.vectors[xId] && emb.vectors[zId]);
-		assert.deepEqual(emb.clusters.at(-1), { members: [xId, zId] }, "dead members pruned from the hull");
 		// The snapshot resolves X to dB only — the deleted chat left no ghost.
 		const snapshot = graphSnapshot(graphDeps);
 		assert.deepEqual(snapshot.nodeSessions[xId], [dB.id]);
@@ -768,7 +755,6 @@ describe("session deletion (deleteChatTraces + deleteChatSession, wave 6)", () =
 			events: graphStore.readEvents(),
 			mappings: graphStore.readMappings(),
 			positions: graphStore.readPositions(),
-			embeddings: graphStore.readEmbeddings(),
 		};
 		const stats = deleteChatTraces(graphStore, dA.id, "preserve-graph");
 		assert.deepEqual(stats, {
@@ -784,7 +770,6 @@ describe("session deletion (deleteChatTraces + deleteChatSession, wave 6)", () =
 		assert.deepEqual(graphStore.readEvents(), before.events);
 		assert.deepEqual(graphStore.readMappings(), before.mappings);
 		assert.deepEqual(graphStore.readPositions(), before.positions);
-		assert.deepEqual(graphStore.readEmbeddings(), before.embeddings);
 		assert.equal(graphStore.readCoverage().some((row) => row.chatId === dA.id), false);
 		assert.equal(graphStore.readCoverage().some((row) => row.chatId === dB.id), true);
 		void xId; void yId; void zId;

tests/layout.test.ts

@@ -108,6 +108,7 @@ describe("settleGraphLayout", () => {
 		const store = {
 			readNodes: () => lines.map((l) => ({ ...l })),
 			readEdges: () => [edge("a", "b")],
+			readMappings: () => [],
 			readPositions: () => ({} as Record<string, Position>),
 			writePositions: (p: Record<string, Position>) => void written.push(p),
 		};
@@ -121,6 +122,7 @@ describe("settleGraphLayout", () => {
 		settleGraphLayout({
 			readNodes: () => [],
 			readEdges: () => [],
+			readMappings: () => [],
 			readPositions: () => ({} as Record<string, Position>),
 			writePositions: (p) => void written.push(p),
 		});

tests/model-catalog.test.ts

@@ -157,7 +157,7 @@ describe("the background roles' resolved pins (rolePins)", () => {
 		};
 		const pins = rolePinsFor(resolveSettings(record).agent.models);
 		assert.deepEqual(pins.researcher, { model: { provider: "openrouter", id: "z-ai/glm-5.3-flash" }, thinkingLevel: "high" });
-		assert.deepEqual(pins.labeler, { model: { provider: "openrouter", id: "qwen/qwen3.8-flash" } }); // level unset
+		assert.deepEqual(pins.auditor, { model: { provider: "openrouter", id: "qwen/qwen3.8-flash" } }); // level unset
 		assert.equal(pins.visualMaker, null, "vision tier untouched");
 	});
 

tests/session-clusters.test.ts

@@ -39,6 +39,7 @@ function fakeStores(
 		events?: LedgerEvent[];
 		chats?: Array<Pick<ChatSummary, "id" | "title" | "createdAt" | "updatedAt">>;
 		sources?: Array<Pick<NotesSource, "id" | "filePath" | "importedAt">>;
+		mappings?: Array<{ chatId: string; sourceId: string; graphNodeId: string }>;
 	} = {},
 ): GraphDeps {
 	const edges: GraphEdge[] = [];
@@ -46,18 +47,13 @@ function fakeStores(
 		readNodes: () => nodes,
 		readEdges: () => edges,
 		readEvents: () => over.events ?? [],
-		readMappings: () => [],
+		readMappings: () => over.mappings ?? [],
 		readCheckpoints: () => [],
 		readCoverage: () => [],
 		readSources: () =>
 			(over.sources ?? []).map((s) => ({ ...s, extractions: [] }) as unknown as NotesSource),
 		readPositions: () => ({}),
 		writePositions: () => {},
-		readEmbeddings: () => ({ model: "dead", dim: 0, vectors: {}, clusters: [], updatedAt: "" }),
-		writeEmbeddings: () => {},
-		readClusterLabels: () => [],
-		appendClusterLabel: () => {},
-		appendNamingRun: () => {},
 		readNamingRuns: () => [],
 	} as unknown as GraphStore;
 	const chatStore: ChatStore = {
@@ -110,6 +106,80 @@ describe("birthSessionPartition", () => {
 	});
 });
 
+// ─── the notes mapping fallback (owner-approved 2026-09-23) ─────────────────
+
+describe("the notes mapping-line fallback", () => {
+	// The PRODUCTION notes shape: importNotes passes messages: null, so
+	// nodes are born with EMPTY provenance — the file's anchor is the
+	// mapping line (interlude live-smoke finding: the provenance-only rule
+	// left every imported file unclustered and invisible to the prober).
+	it("empty-provenance nodes birth under their first mapping line's session", () => {
+		const nodes = [
+			node("a", "Alpha", []),
+			node("b", "Beta", []),
+			node("c", "Gamma", []),
+			node("d", "Delta", [pt("chat1")]), // provenance wins — mapping ignored
+		];
+		const mappings = [
+			{ chatId: "src_notes", sourceId: "p1", graphNodeId: "a" },
+			{ chatId: "src_notes", sourceId: "p2", graphNodeId: "b" },
+			{ chatId: "src_notes", sourceId: "p3", graphNodeId: "c" },
+			// A chat mapping for a node that ALSO has provenance: never consulted.
+			{ chatId: "chat2", sourceId: "p4", graphNodeId: "d" },
+			// A mapping for a node that does not exist: ignored.
+			{ chatId: "src_notes", sourceId: "p5", graphNodeId: "ghost" },
+		];
+		const clusters = birthSessionPartition(nodes, mappings);
+		assert.deepEqual(clusters, [
+			{ id: "src_notes", members: ["a", "b", "c"] },
+			{ id: "chat1", members: ["d"] },
+		], "size-desc, then id asc — src_notes first");
+		// No mapping and no provenance: unclustered.
+		assert.deepEqual(birthSessionPartition([node("x", "X", [])], mappings), []);
+	});
+
+	it("graphSessionIndex lists imported files as kind:file with birth counts (production shape)", () => {
+		const nodes = [node("a", "Alpha", []), node("b", "Beta", []), node("c", "Gamma", [])];
+		const deps = fakeStores(nodes, {
+			mappings: [
+				{ chatId: "src_abc", sourceId: "p1", graphNodeId: "a" },
+				{ chatId: "src_abc", sourceId: "p2", graphNodeId: "b" },
+				{ chatId: "src_abc", sourceId: "p3", graphNodeId: "c" },
+			],
+			sources: [{ id: "src_abc", filePath: "/vault/learn vim.md", importedAt: "2026-09-22T00:00:00.000Z" }],
+		});
+		const index = graphSessionIndex(deps);
+		assert.deepEqual(index, [
+			{
+				id: "src_abc",
+				name: "/vault/learn vim.md",
+				kind: "file",
+				createdAt: "2026-09-22T00:00:00.000Z",
+				updatedAt: "2026-09-22T00:00:00.000Z",
+				propositions: 3,
+			},
+		], "the file births under its src id; the childless chat has no entry (birth sessions only)");
+	});
+
+	it("graphSessionPropositions lists the file's births under the src id", () => {
+		const events: LedgerEvent[] = [
+			{ nodeId: "a", kind: "observation", chatId: "src_abc", at: "2026-09-22T00:00:00.000Z", note: "solid", ref: "obs:p1" },
+		];
+		const deps = fakeStores([node("a", "Alpha", []), node("b", "Beta", [])], {
+			events,
+			mappings: [
+				{ chatId: "src_abc", sourceId: "p1", graphNodeId: "a" },
+				{ chatId: "src_abc", sourceId: "p2", graphNodeId: "b" },
+			],
+			sources: [{ id: "src_abc", filePath: "/vault/learn vim.md", importedAt: "2026-09-22T00:00:00.000Z" }],
+		});
+		assert.deepEqual(graphSessionPropositions(deps, "src_abc"), [
+			{ nodeId: "a", name: "Alpha", understanding: "solid", evaluatedAt: "2026-09-22T00:00:00.000Z" },
+			{ nodeId: "b", name: "Beta", understanding: null, evaluatedAt: null },
+		]);
+	});
+});
+
 // ─── the snapshot join ──────────────────────────────────────────────────────
 
 describe("graphSnapshot birth-session clusters", () => {

tests/settings-body.test.ts

@@ -39,17 +39,17 @@ describe("parseAgentSettingsBody", () => {
 		const r = parseAgentSettingsBody({
 			models: {
 				researcher: { model: { provider: "openrouter", id: "qwen/qwen3.8-flash" } },
-				labeler: { thinkingLevel: "high" },
+				auditor: { thinkingLevel: "high" },
 			},
 		});
 		assert.ok(r.ok);
 		assert.deepEqual(r.settings.models, {
 			researcher: { model: { provider: "openrouter", id: "qwen/qwen3.8-flash" } },
-			labeler: { thinkingLevel: "high" },
+			auditor: { thinkingLevel: "high" },
 		});
 		const bad = parseAgentSettingsBody({ models: { teacher: {} } });
 		assert.equal(bad.ok, false);
-		if (!bad.ok) assert.match(bad.error, /unknown role "teacher" \(supported: researcher, demoBuilder, visualMaker, extractor, auditor, labeler\)/);
+		if (!bad.ok) assert.match(bad.error, /unknown role "teacher" \(supported: researcher, demoBuilder, visualMaker, extractor, auditor\)/);
 		const malformed = parseAgentSettingsBody({ models: { researcher: { model: { provider: 1, id: "x" } } } });
 		assert.equal(malformed.ok, false);
 	});

tests/settings-resolution.test.ts

@@ -97,22 +97,22 @@ describe("resolveSettings", () => {
 	it("resolveModelSpec is field-independent per override aspect", () => {
 		const slots = { cheap: { model: { provider: "zai", id: "slot-model" }, thinkingLevel: "high" as const } };
 		assert.deepEqual(
-			resolveModelSpec("labeler", { model: { provider: "other", id: "x" } }, slots),
+			resolveModelSpec("auditor", { model: { provider: "other", id: "x" } }, slots),
 			{ provider: "other", id: "x", thinkingLevel: "high" }, // override model + slot level
 		);
-		assert.deepEqual(resolveModelSpec("labeler", { thinkingLevel: "max" }, slots), {
+		assert.deepEqual(resolveModelSpec("auditor", { thinkingLevel: "max" }, slots), {
 			provider: "zai",
 			id: "slot-model",
 			thinkingLevel: "max", // override level + slot model
 		});
-		assert.equal(resolveModelSpec("labeler", undefined, {}), undefined);
+		assert.equal(resolveModelSpec("auditor", undefined, {}), undefined);
 	});
 });
 
 describe("the slot tier (BYOK, owner 2026-09-22)", () => {
 	it("slot alone re-tiers every role of its tier (no role overrides present)", () => {
 		const eff = resolveSettings({ version: 1, models: { cheap: { model: { provider: "zai", id: "glm-5.3-flash" } } } });
-		for (const role of ["researcher", "demoBuilder", "extractor", "auditor", "labeler"] as const) {
+		for (const role of ["researcher", "demoBuilder", "extractor", "auditor"] as const) {
 			assert.deepEqual(
 				eff.agent.models[role],
 				{ provider: "zai", id: "glm-5.3-flash", thinkingLevel: undefined }, // level unset → default order
@@ -134,7 +134,7 @@ describe("the slot tier (BYOK, owner 2026-09-22)", () => {
 			id: "r-override",
 			thinkingLevel: "high", // slot level rides the override's model
 		});
-		assert.deepEqual(eff.agent.models.labeler, { provider: "zai", id: "r-slot", thinkingLevel: "high" });
+		assert.deepEqual(eff.agent.models.auditor, { provider: "zai", id: "r-slot", thinkingLevel: "high" });
 	});
 
 	it("vision slot covers visualMaker AND pdfReader; level-only slots resolve as NULL", () => {

tests/settings.test.ts

@@ -145,7 +145,7 @@ describe("sanitizeUserSettings", () => {
 				models: {
 					teacher: { thinkingLevel: "low" }, // NOT a background role — drops
 					researcher: { model: { provider: "openrouter", id: "x/y" } },
-					labeler: { model: { provider: 3, id: "x/y" }, thinkingLevel: "high" }, // bad model, keeps thinking
+					extractor: { model: { provider: 3, id: "x/y" }, thinkingLevel: "high" }, // bad model, keeps thinking
 					auditor: { thinkingLevel: "banana" }, // invalid level → empty override drops
 				},
 			},
@@ -154,7 +154,7 @@ describe("sanitizeUserSettings", () => {
 		const models = out.agent?.models ?? {};
 		assert.equal("teacher" in models, false);
 		assert.deepEqual(models.researcher, { model: { provider: "openrouter", id: "x/y" } });
-		assert.deepEqual(models.labeler, { thinkingLevel: "high" });
+		assert.deepEqual(models.extractor, { thinkingLevel: "high" });
 		assert.equal("auditor" in models, false);
 	});
 
@@ -186,14 +186,13 @@ describe("sanitizeUserSettings", () => {
 		assert.deepEqual(out.agent?.tools, { quiz: false, demo: true });
 	});
 
-	it("BACKGROUND_MODEL_ROLES matches the six background roles (config sync pinned in server tests)", () => {
+	it("BACKGROUND_MODEL_ROLES matches the five background roles (the labeler died with the wave-7 namer kill)", () => {
 		assert.deepEqual([...BACKGROUND_MODEL_ROLES], [
 			"researcher",
 			"demoBuilder",
 			"visualMaker",
 			"extractor",
 			"auditor",
-			"labeler",
 		]);
 	});
 });