> ## Documentation Index
> Fetch the complete documentation index at: https://doc.blankstate.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Product, API, and stability updates across Atlas, Stage & Dive, and the API.

<Update label="September 2026" description="Atlas 2026.09" tags={["Atlas", "Fixes"]}>
  #### New Capabilities

  * **Stage Authoring & Questmaker:** Protocol authoring workflows guided by the Eva authoring assistant, first-frame scene generation, and private asset storage.
  * **In-Browser Stage Dive UI:** Native interactive execution surface (`/stage dive`) with live session state, dynamic protocol feedback, and turn-by-turn action loops.
  * **Provenance & Map Metrics:** Real-time population-level metrics, live scene persistence, and measurement protocol bindings.
  * **Sovereign Architecture:** Self-hosted Postgres and Redis custody architecture with strict server-side authorization on money-movement and protocol definitions.
  * **Multi-Tenancy:** Blueprint publish authority gates and token execution modes supporting test and chargeable production runs.
  * **Pay-as-you-go ICS Billing (v2026.09.1):** Organizations can burst beyond their included monthly ICS (Interaction Computed Signals) allowance, with overage metered at a flat per-ICS rate. Global and per-member spend caps, a live usage meter with proactive quota alerts, and self-serve billing via the Stripe Customer Portal. Billing currency defaults to USD (switchable to GBP).

  #### Bug Fixes & Stability

  * **Scene-Seed Concurrency:** Fixed an editor authorization race condition when persisting scene seeds during rapid multi-user editing in Provenance.
  * **Session Rehydration:** Resolved transient state desync in `/stage dive` when resuming suspended dives with deep history trees.
  * **Protocol Parameter Mapping:** Corrected schema alignment when binding multi-variate measurement protocols to custom scenes.
</Update>

<Update label="September 2026" description="API 2026.09" tags={["API", "Fixes"]}>
  #### New Capabilities

  * **Programmatic Dive Engine:** Core REST API endpoints (`POST /api/v1/dive/open`, `act`, `close`, `status`) enabling programmatic execution of Stage and Dive sessions.
  * **Situations Execution Matrix:** Parameterized multi-turn loops for automated agent evaluation and scenario stress-testing.
  * **Developer Gateway:** Clean JSON root endpoint at `api.blankstate.ai` with uptime probe handling, automated documentation routing, and hardened test sandboxing.

  #### Bug Fixes & Stability

  * **Uptime Probe Handling:** Added native `HEAD` method support on root and `/health` endpoints to prevent false-positive alarms from external monitoring probes.
  * **Template Response Compatibility:** Migrated internal gateway handlers to modern Starlette 1.x signatures to eliminate response buffering latency.
  * **Test Sandbox Isolation:** Hardened test-token execution boundaries ensuring sandbox sessions cannot mutate cached production metrics.
</Update>

<Update label="August 2026" description="Stage & Dive 2026.08" tags={["S&D", "Fixes"]}>
  #### New Capabilities

  * **Live Worlds Reel & Stage Portal:** Interactive dual-stream world reel with seamless cross-fading, vintage CRT screen aesthetics, and portal bubble transitions.
  * **Mobile-Responsive Optimization:** Adaptive viewport layout with dynamic safe-area padding for edge-to-edge mobile devices.

  #### Bug Fixes & Stability

  * **Mobile Viewport Clipping:** Fixed layout overflow on iOS Safari by replacing static viewport height units with dynamic `100svh` and safe-area inset calculations.
  * **Video Reel Decoding Stalls:** Resolved a video decoding stall in Chromium browsers when cycling between looped high-bitrate stage world previews.
  * **Shader Compositing:** Optimized alpha compositing during portal bubble animations to prevent frame drops on low-power mobile devices.
</Update>

<Update label="August 2026" description="Rating & Gravity" tags={["Atlas", "Fixes"]}>
  #### New Capabilities

  * **Rating Engine:** Unbounded, ELO/Glicko-style Rating at the Diver, Stage, and category level. Replaces bounded scoring across S\&D and Atlas.
  * **Gravity in Provenance:** Provenance ships with Gravity: what-if scenario planning on the live population Signature.

  #### Bug Fixes & Stability

  * **Rating Convergence:** Fixed variance stabilization in the Glicko update step when processing low-frequency Diver interaction sessions.
  * **Provenance Signature Caching:** Resolved a cache invalidation bug where stale category aggregates persisted after manual recalculations.
</Update>

<Update label="July 2026" description="Real-Time Streaming" tags={["API", "Fixes"]}>
  #### New Capabilities

  * **Turn-by-Turn Streaming:** Low-latency Server-Sent Events (SSE) streaming for interactive turns via a two-part sentinel protocol ensuring reliable chunk demarcation across edge networks.
  * **Atlas Access:** Atlas enterprise access moves to contracted, price-on-application (POA).

  #### Bug Fixes & Stability

  * **Streaming Sentinel Demarcation:** Fixed a parser desynchronization where malformed network chunking could cause tool-call parameters to fragment mid-stream.
  * **Health Probe Overhead:** Optimized `/sgm/health` probes by eliminating redundant live model embedding re-initialization on routine pings.
</Update>

<Update label="June 2026" description="Stage & Dive Public Launch" tags={["S&D", "Fixes"]}>
  #### New Capabilities

  * **Public Launch:** Stage & Dive goes live at [sand.blankstate.ai](https://sand.blankstate.ai) with anonymous Dive, free Diver Account, and Studio subscription tiers.
  * **Live Stage & Proxy Worlds:** In-browser execution of live Stage Worlds and Proxy Worlds with continuous camera perspective and timeline scrubber controls.
  * **3D Topographic Sensor Visualizer:** Real-time terrain shader driven by live SGM (Spectral Geometric Manifold) measurement agent trails and dynamic illumination palettes.
  * **Fidelity Lab:** Interactive workbench for testing interaction protocols with multi-select cast selection across synthetic and human personas, radar score visualizers, and domain scenario corpora.
  * **Arena:** Opt-in mode for attributable Dives. Free, consented, revocable.

  #### Bug Fixes & Stability

  * **Timeline Scrubber Drift:** Corrected frame-index drift when scrubbing backward across long session trajectory replays.
  * **GLSL Shader Precision:** Fixed precision artifacts on mobile GPUs in the terrain shader by standardizing on high-precision float coordinates.
</Update>

<Update label="June 2026" description="SGM Sensor Core Integration" tags={["API", "Fixes"]}>
  #### New Capabilities

  * **SGM Sensor Bindings:** Core API integration for Interaction Behavioural Fields (IBF) measurements via `/api/v1/sense`.
  * **Eigenspace Compilation:** Native `/compile-eigenspace` endpoint for trajectory projection and state manifold calculations.

  #### Bug Fixes & Stability

  * **Batch Serialization:** Fixed a payload parsing error in batch sensing requests where trailing commas caused serialization failures.
  * **Matrix Dimensionality:** Corrected bounds validation on high-dimensional eigenspace projection matrices.
</Update>

<Update label="May 2026" description="SGM 0.2 & ICS Metering" tags={["API", "Fixes"]}>
  #### New Capabilities

  * **SGM 0.2:** Production multi-modal model unifying text, transcript, audio, video, and environment observation on the same instrument.
  * **ICS Metering:** Every measurement produces an Interaction Computed Signal (ICS): one per unique nuance activated.
  * **Provenance Noise Gates:** Noise-gate calibration and selective protocol sharing across organization tenants in Provenance.

  #### Bug Fixes & Stability

  * **Quota Boundary Enforcement:** Fixed a timestamp boundary condition where monthly ICS quota resets failed to trigger at exact calendar month rollovers.
  * **Multi-Modal Alignment:** Resolved audio/video synchronization drift during long-form multi-modal sensor ingestion.
</Update>

<Update label="April 2026" description="IBF API v1 & Quota Controls" tags={["API", "Atlas", "Fixes"]}>
  #### New Capabilities

  * **IBF API v1:** Stable API release at `https://api.blankstate.ai/api/v1/`.
  * **Token Management Dashboard:** Developer API token controls with real-time ICS quota tracking and organization-level resource isolation.

  #### Bug Fixes & Stability

  * **Token Scope Validation:** Fixed an edge case where revoked API tokens could continue reading cached non-sensitive protocol metadata.
  * **Rate Limit Headers:** Standardized `Retry-After` and `X-RateLimit-Remaining` response headers across all rate-limited endpoints.
</Update>

<Update label="March 2026" description="Spectral Feature 1.5 Preview" tags={["Atlas"]}>
  * **Spectral Manifold Engine:** Preview of the 1.5 spectral feature engine with interaction derivation and noise grid calibration.
  * **Anonymized Scene Perspectives:** Culture and population-level metric aggregation in Provenance with selective access controls.
</Update>

<Update label="February 2026" description="Stage UI & Sense Client 1.0" tags={["Atlas", "API", "Fixes"]}>
  #### New Capabilities

  * **Stage Interface:** Early interactive Stage authoring interface and initial Eva assistant workflows.
  * **Sense Client 1.0:** Initial typed client SDK bindings for the Sense API with Redis-backed validation.

  #### Bug Fixes & Stability

  * **Client Connection Pooling:** Fixed Redis connection leaks in the Sense client during high-concurrency burst workloads.
  * **Schema Validation Errors:** Improved descriptive error formatting when payload fields violated Protocol type constraints.
</Update>

<Update label="January 2026" description="Interaction Safeguards & Replay" tags={["API", "Fixes"]}>
  #### New Capabilities

  * **IBF Language Safeguards:** Interaction Behavioural Fields safety gates, multi-edit protocol buffering, and trajectory replay verification.
  * **Replay Rationale:** Natural language query and rationale extraction within `/replay`.

  #### Bug Fixes & Stability

  * **Replay Indexing:** Corrected timestamp drift in trajectory replay indexing across multi-agent turns.
  * **Protocol Buffering:** Fixed memory overhead in multi-edit protocol buffers during rapid undo/redo cycles.
</Update>

<Update label="Q4 2025" description="Foundation: Protocols & Blueprints" tags={["Atlas", "API"]}>
  * **Protocol Blueprints:** Reusable organizational blueprints, protocol caching, and public protocol sharing.
  * **Causal Trajectory Foundation:** Initial formulation of causal interaction fields and multi-actant observation backbones.
</Update>

***

Updates are also announced at [blankstate.ai/newsroom](https://blankstate.ai/newsroom).