Balchandar · Balchandar · Feb 18, 2026 · Feb 18, 2026
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@
 
 ---
 
-[![Version](https://img.shields.io/badge/version-4.5.0-blue.svg)](#)
+[![Version](https://img.shields.io/badge/version-1.5.1-blue.svg)](#)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 [![Python](https://img.shields.io/badge/python-3.9%2B-blue)](#)
 [![MCP](https://img.shields.io/badge/MCP-compatible-brightgreen)](#)
@@ -15,9 +15,9 @@
 
 ---
 
-## What's New in v4.5
+## What's New in v1.5.1
 
-IntentusNet v4.5 introduces **provable determinism** — the execution runtime now includes built-in mechanisms to verify, enforce, and prove that execution behavior is deterministic across runs, environments, and model swaps.
+IntentusNet v1.5.1 introduces **provable determinism** — the execution runtime now includes built-in mechanisms to verify, enforce, and prove that execution behavior is deterministic across runs, environments, and model swaps.
 
 | Feature | Description |
 |---------|-------------|
@@ -213,17 +213,17 @@ IntentusNet provides an explicit execution contract:
 | Structured Errors            | **Provided**          | Typed error codes, no silent failures            |
 | Crash Recovery               | **Provided**          | WAL-backed execution state & recovery            |
 | Signed WAL (REGULATED)       | **Provided**          | Ed25519 per-entry signatures for audit trail     |
-| Execution Fingerprinting     | **Provided (v4.5)**   | SHA-256 fingerprint proves deterministic execution |
-| Deterministic-Safe CI/CD     | **Provided (v4.5)**   | 9-gate pipeline enforces determinism before deploy |
-| Drift Detection              | **Provided (v4.5)**   | Automatic nondeterminism detection via fingerprints |
+| Execution Fingerprinting     | **Provided (v1.5.1)**   | SHA-256 fingerprint proves deterministic execution |
+| Deterministic-Safe CI/CD     | **Provided (v1.5.1)**   | 9-gate pipeline enforces determinism before deploy |
+| Drift Detection              | **Provided (v1.5.1)**   | Automatic nondeterminism detection via fingerprints |
 
 Full guarantee details: https://intentusnet.com/docs/guarantees
 
 ---
 
-## Provable Determinism (v4.5)
+## Provable Determinism (v1.5.1)
 
-IntentusNet v4.5 treats determinism as a **provable property**, not just a design goal.
+IntentusNet v1.5.1 treats determinism as a **provable property**, not just a design goal.
 
 ### Execution Fingerprinting
 
@@ -483,7 +483,7 @@ IntentusNet is a **deterministic execution runtime**, not an autonomous agent fr
 - No task planning or reasoning
 - No evaluation of model outputs
 - No replacement for workflow engines
-- No distributed consensus in v4
+- No distributed consensus in v1
 
 ### Determinism Boundary
 
@@ -496,7 +496,7 @@ Non-deterministic model behavior is detected, recorded, and surfaced — never h
 
 See [docs/roadmap.md](docs/roadmap.md) for the full roadmap.
 
-**Current: v4.5** — Provable Determinism
+**Current: v1.5.1** — Provable Determinism
 
 - Execution fingerprinting
 - Deterministic-safe CI/CD (9 gates)

diff --git a/docs-site/docs/architecture/determinism-model.mdx b/docs-site/docs/architecture/determinism-model.mdx
@@ -311,9 +311,9 @@ Capability(intent=IntentRef(name="Process", version="2.0"))
 | Model output | No | Yes | Yes |
 | Network latency | No | Yes | N/A |
 
-## Provable Determinism (v4.5)
+## Provable Determinism (v1.5.1)
 
-IntentusNet v4.5 extends the determinism model with **provable guarantees**:
+IntentusNet v1.5.1 extends the determinism model with **provable guarantees**:
 
 ### Execution Fingerprinting
 

diff --git a/docs-site/docs/cli/overview.mdx b/docs-site/docs/cli/overview.mdx
@@ -20,7 +20,7 @@ Verify installation:
 
 ```bash
 intentusnet --version
-# intentusnet 4.5.0
+# intentusnet 1.5.1
 ```
 
 ## Command Summary

diff --git a/docs-site/docs/demos/overview.mdx b/docs-site/docs/demos/overview.mdx
@@ -15,7 +15,7 @@ These demos illustrate IntentusNet's core capabilities with realistic scenarios.
 | [Dangerous Target Filtering](./dangerous-target-filtering) | Policy filtering protects CCTV while allowing other systems |
 | [Crash Recovery](./crash-recovery) | Mid-execution crash recovery with deterministic resume |
 | [Model Swap Prevention](./model-swap-prevention) | Deterministic routing prevents behavioral drift |
-| [Project Blackbox](./project-blackbox) | 8-act end-to-end proof of all deterministic guarantees (v4.5) |
+| [Project Blackbox](./project-blackbox) | 8-act end-to-end proof of all deterministic guarantees (v1.5.1) |
 
 ## Demo Format
 

diff --git a/docs-site/docs/demos/project-blackbox.mdx b/docs-site/docs/demos/project-blackbox.mdx
@@ -6,7 +6,7 @@ description: "8-act end-to-end demonstration proving all deterministic guarantee
 
 # Project Blackbox
 
-Project Blackbox is an 8-act end-to-end demonstration that proves every deterministic guarantee provided by IntentusNet v4.5. It runs locally in under 2 minutes with zero external dependencies.
+Project Blackbox is an 8-act end-to-end demonstration that proves every deterministic guarantee provided by IntentusNet v1.5.1. It runs locally in under 2 minutes with zero external dependencies.
 
 ## Running the Demo
 

diff --git a/docs-site/docs/getting-started/install.mdx b/docs-site/docs/getting-started/install.mdx
@@ -26,7 +26,7 @@ Verify installation:
 
 ```bash
 python -c "import intentusnet; print(intentusnet.__version__)"
-# Output: 4.5.0
+# Output: 1.5.1
 ```
 
 ## Installation Options
@@ -78,7 +78,7 @@ pip install -e ".[dev]"
 Pull the official image:
 
 ```bash
-docker pull intentusnet/runtime:4.5.0
+docker pull intentusnet/runtime:1.5.1
 ```
 
 Run a container:
@@ -87,7 +87,7 @@ Run a container:
 docker run -it --rm \
   -v $(pwd)/config:/app/config \
   -v $(pwd)/records:/app/.intentusnet/records \
-  intentusnet/runtime:4.5.0
+  intentusnet/runtime:1.5.1
 ```
 
 ## Verify Installation
@@ -123,7 +123,7 @@ Expected output:
 
 ```
 Name: intentusnet
-Version: 4.5.0
+Version: 1.5.1
 Summary: Deterministic execution runtime for multi-agent systems
 Requires: cryptography, websockets, pyzmq, fastapi, uvicorn, python-dateutil
 ```

diff --git a/docs-site/docs/guarantees/overview.mdx b/docs-site/docs/guarantees/overview.mdx
@@ -21,17 +21,17 @@ Every production runtime needs a clear contract. IntentusNet's contract is:
 | Structured Errors            | **Provided**          | Typed error codes, no silent failures                  |
 | Crash Recovery               | **Provided**          | WAL-backed execution state with recovery               |
 | Signed WAL (REGULATED)       | **Provided**          | Ed25519 per-entry signatures for audit trail           |
-| Execution Fingerprinting     | **Provided (v4.5)**   | SHA-256 fingerprint proves deterministic execution     |
-| Deterministic-Safe CI/CD     | **Provided (v4.5)**   | 9-gate pipeline enforces determinism before deploy     |
-| Drift Detection              | **Provided (v4.5)**   | Automatic nondeterminism detection via fingerprints    |
+| Execution Fingerprinting     | **Provided (v1.5.1)**   | SHA-256 fingerprint proves deterministic execution     |
+| Deterministic-Safe CI/CD     | **Provided (v1.5.1)**   | 9-gate pipeline enforces determinism before deploy     |
+| Drift Detection              | **Provided (v1.5.1)**   | Automatic nondeterminism detection via fingerprints    |
 
 :::note Design Goals vs. Implemented Guarantees
 Features marked as "Design Goal" are architecturally planned but may have implementation limitations in the current version. See individual guarantee pages for details.
 :::
 
 ## Quick Reference
 
-### What IS Guaranteed (v4.5)
+### What IS Guaranteed (v1.5.1)
 
 ```
 ✓ Deterministic agent ordering
@@ -42,9 +42,9 @@ Features marked as "Design Goal" are architecturally planned but may have implem
 ✓ Trace span emission for every decision
 ✓ Policy allow/deny evaluation
 ✓ Signed WAL entries (REGULATED mode)
-✓ Execution fingerprinting (v4.5)
-✓ Deterministic-safe CI/CD enforcement (v4.5)
-✓ Drift detection (v4.5)
+✓ Execution fingerprinting (v1.5.1)
+✓ Deterministic-safe CI/CD enforcement (v1.5.1)
+✓ Drift detection (v1.5.1)
 ```
 
 ### What is NOT Guaranteed
@@ -140,7 +140,7 @@ Guarantees may evolve across versions:
 | 0.3.x           | Historical response retrieval, stable hashes   |
 | 1.0.x           | WAL signing, compliance modes (Phase I)        |
 | 4.0.x           | Enterprise features, gateway enforcement       |
-| 4.5.x           | Execution fingerprinting, deterministic CI/CD, drift detection |
+| 1.5.x           | Execution fingerprinting, deterministic CI/CD, drift detection |
 
 ## Verifying Guarantees
 

diff --git a/docs-site/docs/introduction/what-is-intentusnet.mdx b/docs-site/docs/introduction/what-is-intentusnet.mdx
@@ -73,7 +73,7 @@ IntentusNet may be overkill if:
 
 | Property        | Value                                |
 | --------------- | ------------------------------------ |
-| Current Version | 4.5.0                                |
+| Current Version | 1.5.1                                |
 | Python Support  | 3.9+                                 |
 | Status          | Production-ready for core guarantees |
 | License         | MIT                                  |

diff --git a/docs-site/docs/production/observability.mdx b/docs-site/docs/production/observability.mdx
@@ -300,7 +300,7 @@ app = FastAPI()
 
 @app.get("/health")
 async def health():
-    return {"status": "healthy", "version": "4.5.0"}
+    return {"status": "healthy", "version": "1.5.1"}
 
 @app.get("/health/ready")
 async def ready():

diff --git a/docs-site/docs/release-notes/v1-5-1.mdx b/docs-site/docs/release-notes/v1-5-1.mdx
@@ -0,0 +1,86 @@
+---
+sidebar_position: 1
+title: "v1.5.1 — Provable Determinism"
+description: "Release notes for IntentusNet v1.5.1"
+---
+
+# IntentusNet v1.5.1 — Provable Determinism
+
+**Released:** 2026-02-12
+
+## Summary
+
+IntentusNet v1.5.1 introduces **provable determinism** — execution behavior can now be cryptographically verified, drift-detected, and CI-enforced. Determinism is no longer just a design property; it is a measurable, enforceable guarantee.
+
+## New Features
+
+### Execution Fingerprinting
+
+Every execution produces a **SHA-256 fingerprint** computed from the intent sequence, agent call sequence, parameter hashes, output hashes, retry pattern, execution order, and timeout values.
+
+- Same input + same runtime = same fingerprint
+- Fingerprint mismatch = nondeterminism detected
+
+### Deterministic-Safe CI/CD Pipeline
+
+A 9-gate verification pipeline enforces determinism before deployment:
+
+| Gate | Purpose |
+|------|---------|
+| Build Reproducibility | Same source → same binary SHA-256 |
+| Deterministic Execution | Same input → same fingerprint across N runs |
+| WAL Replay Final-State | Replayed response hash matches original |
+| Entropy Detection | Static scan blocks unseeded randomness |
+| Container Reproducibility | Same Dockerfile → same image hash |
+| Routing Determinism | Same capabilities → same agent selection |
+| Crash Recovery | Side-effect-aware resume/block decisions |
+| WAL Integrity & Tamper | Hash chain + Ed25519 signature verification |
+| Runtime Snapshot | Serialization round-trip integrity |
+
+All 9 gates must pass. A single failure blocks deployment.
+
+### Drift Detection
+
+Automatic detection of nondeterministic execution through fingerprint comparison across runs.
+
+### WAL Replay Verification
+
+Stored responses can be proven to match original execution by comparing content hashes.
+
+### Entropy Scanning
+
+Static analysis gate scans deterministic-critical code paths for unseeded randomness, `uuid4()` in step IDs, `time()` in hashes, and `os.urandom()` in hash computation.
+
+### Project Blackbox Demo
+
+An 8-act end-to-end demonstration proving all deterministic guarantees. See [Project Blackbox](../demos/project-blackbox).
+
+## New CI Gate Scripts
+
+| Script | Gate |
+|--------|------|
+| `gate_deterministic_execution.py` | Evaluation report thresholds |
+| `gate_wal_replay_state.py` | WAL replay hash verification |
+| `gate_entropy_detection.py` | Static entropy scanning |
+| `gate_routing_determinism.py` | Agent selection determinism |
+| `gate_crash_recovery.py` | Recovery decision correctness |
+| `gate_wal_integrity.py` | Hash chain and signature verification |
+| `gate_runtime_snapshot.py` | Serialization round-trip verification |
+
+## Updated Guarantees
+
+Three new guarantees added to the execution contract:
+
+| Guarantee | Status |
+|-----------|--------|
+| Execution Fingerprinting | **Provided (v1.5.1)** |
+| Deterministic-Safe CI/CD | **Provided (v1.5.1)** |
+| Drift Detection | **Provided (v1.5.1)** |
+
+## Breaking Changes
+
+None. v1.5.1 is fully backward-compatible with v1.x.
+
+## Migration
+
+No migration required. New features are additive.
diff --git a/docs-site/docusaurus.config.ts b/docs-site/docusaurus.config.ts
@@ -46,7 +46,7 @@ const config: Config = {
           lastVersion: 'current',
           versions: {
             current: {
-              label: '4.5',
+              label: '1.5.1',
               path: '',
             },
           },

diff --git a/docs-site/sidebars.ts b/docs-site/sidebars.ts
@@ -133,7 +133,7 @@ const sidebars: SidebarsConfig = {
       label: 'Release Notes',
       collapsed: true,
       items: [
-        'release-notes/v4-5',
+        'release-notes/v1-5-1',
       ],
     },
   ],

diff --git a/docs/ci-cd.md b/docs/ci-cd.md
@@ -2,7 +2,7 @@
 
 ## Overview
 
-IntentusNet v4.5 includes a **9-gate CI/CD verification pipeline** that enforces determinism before deployment. This is not a test suite — it is a deployment gate. Every gate must pass, or the release is blocked.
+IntentusNet v1.5.1 includes a **9-gate CI/CD verification pipeline** that enforces determinism before deployment. This is not a test suite — it is a deployment gate. Every gate must pass, or the release is blocked.
 
 The pipeline is defined in `.github/workflows/deterministic-stability.yml`.
 

diff --git a/docs/determinism.md b/docs/determinism.md
@@ -2,7 +2,7 @@
 
 ## Overview
 
-IntentusNet v4.5 treats determinism as a **provable property**, not just a design goal. The runtime includes built-in mechanisms to verify, enforce, and prove that execution behavior is deterministic across runs, environments, and model swaps.
+IntentusNet v1.5.1 treats determinism as a **provable property**, not just a design goal. The runtime includes built-in mechanisms to verify, enforce, and prove that execution behavior is deterministic across runs, environments, and model swaps.
 
 This document covers:
 
@@ -188,4 +188,4 @@ These nondeterministic inputs are **recorded** so they can be inspected, but the
 - [CI/CD Gate Specification](ci-cd.md)
 - [WAL Format](wal-format.md)
 - [Runtime Determinism Core](runtime-determinism.md)
-- [Release Notes v4.5](release-notes/v4.5.md)
+- [Release Notes v1.5.1](release-notes/v1.5.1.md)