Add Conversation Arc docs, blog entry, and fixes

Add a new Conversation Arc docs page with interactive demos (conversation arc store + freshness scrubber), wire the route into the docs app and nav, and include the new blog entry "talk-track-intelligence". Update docs metadata and entries to surface the new post. Standardize provenance/lifecycle field names to camelCase (e.g. createdAt, stableId, ttlHint, baseComponent, variantKey, proposalId) across docs and examples and update related tests. Tweak prerender route titles and a minified-shell test fixture; adjust prev/next links between feature pages. Overall: docs + demo additions, minor API/docs text changes, and test updates to match the new naming.

Author: emeeks

CLAUDE.md

@@ -343,8 +343,8 @@ store.record({ type: "suggestion-shown", components: ["LineChart"], intent: "tre
 
 ### Annotation provenance + lifecycle (`semiotic/ai`, types also re-exported from `semiotic`)
 Type surface for "where did this annotation come from?" and "is it stale?" Optional blocks attached to any annotation — existing arrays keep working unchanged.
-- **`provenance`**: `{ author?, source?, confidence?, created_at?, stable_id? }`. `source` is an open string union (`"user" | "ai" | "agent" | "import" | "computed" | "system" | (string & {})`).
-- **`lifecycle`**: `{ freshness?, ttl_hint?, anchor? }`. `freshness` is `"fresh" | "aging" | "stale" | "expired"`. `anchor` is `"fixed" | "latest" | "sticky" | "semantic"`. `ttl_hint` accepts an ISO 8601 duration string (`"P30D"`) or milliseconds.
+- **`provenance`**: `{ author?, source?, confidence?, createdAt?, stableId? }`. `source` is an open string union (`"user" | "ai" | "agent" | "import" | "computed" | "system" | (string & {})`).
+- **`lifecycle`**: `{ freshness?, ttlHint?, anchor? }`. `freshness` is `"fresh" | "aging" | "stale" | "expired"`. `anchor` is `"fixed" | "latest" | "sticky" | "semantic"`. `ttlHint` accepts an ISO 8601 duration string (`"P30D"`) or milliseconds.
 - **`withProvenance(annotation, { provenance?, lifecycle? })`** → returns a new annotation with the blocks attached. Pure, SSR-safe.
 - **`Annotated<T>`** type alias: `T & { provenance?, lifecycle? }`. Use for explicit typing.
 - Type surface only at this stage. Freshness computation, default visual treatment, and stable-id anchor resolution land later.
@@ -355,16 +355,16 @@ import { withProvenance } from "semiotic/ai"
 const ann = withProvenance(
   { type: "y-threshold", value: 100, label: "SLA breach" },
   {
-    provenance: { author: "alice", source: "user", created_at: "2026-05-20T14:00:00Z" },
-    lifecycle: { ttl_hint: "P30D", anchor: "semantic" },
+    provenance: { author: "alice", source: "user", createdAt: "2026-05-20T14:00:00Z" },
+    lifecycle: { ttlHint: "P30D", anchor: "semantic" },
   },
 )
 ```
 
 ### Variant discovery (`semiotic/ai`)
 Interface for proposing and scoring chart variants beyond the hand-curated `capability.variants`. Heuristic and model-based proposers plug in through `registerVariantDiscovery`. M1 ships the type surface + stub implementations; behavior arrives in subsequent milestones.
-- **`VariantProposal`**: `{ id, base_component, intent_deltas?, rubric_deltas?, buildProps?, rationale?, source: "manual" | "heuristic" | "model", variant_key?, tags? }`.
-- **`VariantScore`**: `{ proposal_id, fit (0–5), novelty (0–1), risk (0–1), reasons }`. `fit` mixes with `suggestCharts` composite scores in unified rankings.
+- **`VariantProposal`**: `{ id, baseComponent, intentDeltas?, rubricDeltas?, buildProps?, rationale?, source: "manual" | "heuristic" | "model", variantKey?, tags? }`.
+- **`VariantScore`**: `{ proposalId, fit (0–5), novelty (0–1), risk (0–1), reasons }`. `fit` mixes with `suggestCharts` composite scores in unified rankings.
 - **`proposeVariant(component, capability, context)`** → `VariantProposal[]`. M1 stub returns `[]`.
 - **`evaluateVariantProposal(proposal, profile, audience?)`** → `VariantScore`. M1 stub returns a neutral baseline with a reason pointing back at the design doc.
 - **`registerVariantDiscovery(fn)`** → registers an external proposer, returns an unregister callback. Pair with `getRegisteredVariantDiscovery()` / `clearVariantDiscovery()` for inspection and teardown.

docs/src/App.js

@@ -96,6 +96,7 @@ import CustomChartsPage from "./pages/features/CustomChartsPage"
 import CapabilitiesPage from "./pages/features/CapabilitiesPage"
 import InterrogationPage from "./pages/features/InterrogationPage"
 import SuggestionsPage from "./pages/features/SuggestionsPage"
+import ConversationArcPage from "./pages/features/ConversationArcPage"
 
 // New cookbook pages
 import HomerunMapPage from "./pages/cookbook/HomerunMapPage"
@@ -399,6 +400,7 @@ export default function DocsApp() {
               <Route path="capabilities" element={<CapabilitiesPage />} />
               <Route path="suggestions" element={<SuggestionsPage />} />
               <Route path="interrogation" element={<InterrogationPage />} />
+              <Route path="conversation-arc" element={<ConversationArcPage />} />
               <Route path="serialization" element={<SerializationPage />} />
               <Route path="vega-lite" element={<VegaLiteTranslatorPage />} />
             </Route>

docs/src/blog/entries-meta.js

@@ -30,6 +30,18 @@ export const allBlogEntriesMeta = [
     excerpt:
       "3.6.0 turns Semiotic's observation hooks, native annotations, and streaming runtime into an explicit AI-facing surface. Charts declare what they're for; datasets get profiled and ranked; audiences get calibrated; conversations anchor back to the chart instead of stopping at a chat bubble. Three case-study posts published alongside the release walk through what the new shape makes possible.",
   },
+  {
+    slug: "talk-track-intelligence",
+    title: "The arc, the annotation, and the variant",
+    subtitle:
+      "Three composable AI surfaces shipping together in 3.5.x: conversation-arc telemetry, annotation provenance + lifecycle, and a variant discovery plug point. Two are runnable inline.",
+    author: "Elijah Meeks",
+    date: "2026-05-27",
+    tags: ["case-study", "ai", "roadmap"],
+    excerpt:
+      "AI-assisted chart authoring is a session, not a single call. Semiotic 3.5.x lands the spine for treating that session as a first-class thing — an event vocabulary for the arc itself, provenance + lifecycle on every annotation, and an extension surface for variant proposers. Interactive demos for the first two.",
+    draft: true,
+  },
   {
     slug: "live-conversational-dashboard",
     title: "Live conversational dashboards",

docs/src/blog/entries.js

@@ -52,6 +52,7 @@ import MultimodalResponse from "./entries/multimodal-response.js"
 import AnchoredConversations from "./entries/anchored-conversations.js"
 import LiveDashboard from "./entries/live-conversational-dashboard.js"
 import Release360 from "./entries/release-3-6-0.js"
+import TalkTrackIntelligence from "./entries/talk-track-intelligence.js"
 
 /**
  * Every entry, drafts included. Consumers that need the full list (direct
@@ -60,6 +61,7 @@ import Release360 from "./entries/release-3-6-0.js"
  */
 export const allBlogEntries = [
   Release360,
+  TalkTrackIntelligence,
   LiveDashboard,
   AnchoredConversations,
   MultimodalResponse,