extraction: message-granular proposition anchors; factory budget back to 4096

src/core/contracts/graph.ts

@@ -231,11 +231,20 @@ export interface ExtractedProposition {
 	/** Verbatim phrasings the session used. */
 	aliases: string[];
 	/* Submit-schema slim (owner, 2026-09-28): `messages` and `evidence`
-	 * are GONE. Provenance is chat-level (the run's source key); the
-	 * verbatim-quote fields were never persisted and weak models burned
-	 * their retries on them ("propositions.0: must be object" — the
-	 * stringified-payload collapse). The extractor reports propositions
-	 * + structure, nothing else. */
+	 * are GONE. The verbatim-quote fields were never persisted and weak
+	 * models burned their retries on them ("propositions.0: must be
+	 * object" — the stringified-payload collapse). The extractor reports
+	 * propositions + structure, nothing else. */
+	/** OPTIONAL, SESSION PATH ONLY (owner, 2026-10-13): the message id of
+	 *  the ONE teacher passage this proposition came from — the extractor
+	 *  copies it from the view's "TEACHER [id]" label (core/coverage.ts
+	 *  messageViewLines) and the submit seam validates it against the
+	 *  CURRENT batch. The merger stamps it into the node's provenance
+	 *  point {chatId, messageId} (new nodes AND link-appends); chains
+	 *  stay chat-level. Notes imports and legacy/core callers have none:
+	 *  undefined → messageId "" (chat-level), so NO persisted shape or
+	 *  format version changes (GraphNode / ProvenancePoint untouched). */
+	messageId?: string;
 }
 
 /** One proposed argument (extractor redesign, 2026-09-30). Endpoints are

src/core/graph.ts

@@ -11,8 +11,10 @@
  *                      same-source digest (digest-aware, 2026-09-30
  *                      evening: the extractor continues its own source,
  *                      references existing ids verbatim, assembles
- *                      cross-stretch itself). Fully trusted: no stage
- *                      re-checks it.
+ *                      cross-stretch itself). Session propositions carry
+ *                      their passage's messageId (2026-10-13) — the
+ *                      merger's provenance anchor. Fully trusted: no
+ *                      stage re-checks it.
  *   auditor (LLM)    → AuditVerdicts: identity links (local id → an existing
  *                      node, or create) via graph-exploration tools —
  *                      links ONLY (owner, 2026-09-28 evening: the auditor
@@ -109,11 +111,14 @@ export interface MergeSource {
 	coverage?: CoverageEntry[];
 }
 
-/** The run's chat-level provenance point (submit-schema slim, 2026-09-28:
- *  propositions no longer carry message ids — the model never reported
- *  them reliably anyway — so every birth from a run shares one point). */
-function pointOf(chatId: string): ProvenancePoint[] {
-	return [{ chatId, messageId: "" }];
+/** The run's provenance point. Chat-level by default (submit-schema slim,
+ *  2026-09-28 — the run's source key is the whole point); since the anchor
+ *  restore (owner, 2026-10-13) a SESSION birth may carry its passage's
+ *  message id — the extractor-copied messageId, validated at the submit
+ *  seam against the current batch. Chains, notes imports, and
+ *  legacy/core callers lacking an anchor keep "" (chat-level). */
+function pointOf(chatId: string, messageId?: string): ProvenancePoint[] {
+	return [{ chatId, messageId: messageId ?? "" }];
 }
 
 const samePoint = (a: ProvenancePoint, b: ProvenancePoint): boolean =>
@@ -166,7 +171,11 @@ export function mergeFindings(
 	// extractor's findings verbatim; the auditor's links join here by id.
 	for (const p of findings.propositions) {
 		if (mapping.has(p.id)) continue; // duplicate id WITHIN this submit — first resolution stands
-		const points = pointOf(chatId);
+		// The anchor (2026-10-13): a session proposition may carry its
+		// passage's messageId — it rides BOTH the create and the link-append
+		// line (each re-encounter anchors to ITS passage); absent (notes,
+		// legacy/core callers) → "", chat-level as before.
+		const points = pointOf(chatId, p.messageId);
 		const linkTo = linkOf.get(p.id);
 		let graphNodeId: string;
 		if (linkTo !== undefined && existingIds.has(linkTo)) {

src/core/settings.ts

@@ -321,8 +321,11 @@ export interface GraphSettings {
 	 *  carries the whole graph + instructions, so a smaller budget means
 	 *  more, smaller runs — each paying that fixed overhead).
 	 *
-	 *  FACTORY DEFAULT 4096 (the pre-setting constant, config.ts's
-	 *  EXTRACTION.chunkTokens — vision-extraction-coverage.md, 2026-09-15).
+	 *  FACTORY DEFAULT 4096 (owner, 2026-10-13: halved back from the
+	 *  digest-era 8192 — the labeled passages + message anchors made
+	 *  smaller batches worth their overhead again; the pre-setting
+	 *  constant was 4096, vision-extraction-coverage.md, 2026-09-15).
+	 *  Only the FACTORY moves: an explicit user value always wins.
 	 *
 	 *  FLOOR 500 (EXTRACTION_CHUNK_TOKENS_FLOOR, the implementer's call
 	 *  per the owner's dispatch): every run pays the graph-carrying
@@ -402,7 +405,7 @@ export const FACTORY_SETTINGS: FactorySettings = {
 		sessionNameSerif: true,
 		mdRendering: { headingWeight: 900, boldColor: null, italicColor: null },
 	},
-	graph: { enabled: true, rendering: true, extractionChunkTokens: 8192 },
+	graph: { enabled: true, rendering: true, extractionChunkTokens: 4096 },
 	compaction: { thresholdTokens: 150_000 },
 };