How is execution rehearsal different from traditional testing?

Tests validate expected behavior in isolated conditions. Execution rehearsal proves real system behavior across dependencies, edge cases, and policy-required scenarios before deployment.

What happens if a rehearsal fails?

Deployment is automatically blocked, and the failure is routed with evidence to the appropriate reviewer based on the domain of impact such as security, performance, or integration.

Are rehearsal results auditable?

Yes. Context OS records the scenarios rehearsed, outcomes, and decision gates, producing an audit trail of what was proven before deployment.

How does Context OS enforce policy-gated simulation and execution rehearsal so code behavior is proven before deployment?

Context OS prevents production from becoming the test environment by requiring execution rehearsal as a deployment gate, validating behavior, dependencies, performance, and security before any release can proceed.

Agentic Code Simulations: Execution Rehearsal for Pre-Deployment Governance

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The Problem

The Pre-Production Gap

Traditional testing misses system-level behavior, leaving production as the final test environment and creating incidents

Testing

Incomplete Test Coverage

Unit tests often pass but fail at system integration

Isolated tests miss full system behavior

Edge cases remain undetected

Integration failures occur late

Test assumptions do not reflect production

Hidden dependencies cause errors

Outcome: System Behavior Unverified

Trust

Unvalidated AI Code

AI-generated code cannot be fully trusted without pre-deployment checks

No way to verify AI fixes early

Developers unsure of correctness

Potential regressions go unnoticed

AI decisions lack full context

Errors surface post-commit

Outcome: Code Confidence Low

Deployment

Binary Deployment Risk

Deployments either succeed or fail, leaving no middle ground for issues

Edge cases only discovered in production

Incidents become real-time tests

No gradual rollout validation

Failures cause operational impact

Late fixes increase cost

Outcome: Production as Test

How It Works

Execution Rehearsal With Context OS

Context OS ensures code changes are rehearsed pre-deployment, identifying issues early, enforcing policy, and improving confidence

Approval Agent

Auto-approves changes that pass all simulations, providing evidence for deployment approval

Failed simulations automatically block deployment and escalate edge case failures for human review

Safe Automated Approvals

Policy Enforcement

Defines simulation requirements by code type as mandatory deployment gates

Database changes require migration rehearsal, and API updates require contract validation with no exceptions

Enforced Simulation Policies

Exception Routing

Routes rehearsal failures to the appropriate reviewers based on type of issue

Performance regressions go to the performance team; security failures go to security experts

Correct Authority Notified

Audit Agent

Captures a complete record of all rehearsals, including tested scenarios and outcomes

Provides evidence for compliance, post-incident analysis, and regulatory requirements

Full Compliance Evidence

Decision Review

Analyzes rehearsal patterns to identify gaps, recurring issues, and edge case coverage

Helps teams improve simulation coverage and deployment confidence over time

Insightful Pattern Analysis

Continuous Improvement

Lessons from rehearsals inform better policy, more comprehensive tests, and safer deployments

Institutional learning reduces failures and strengthens confidence in pre-production deployments

Higher Deployment Confidence

The Paradigm Shift

Execution Rehearsal Example

This example shows how Context OS rehearses an API rate limiting change, catching issues before production deployment

Description Change

Modify API rate limiting from fixed 100/min to dynamic user-tier limits. All tier rules must handle edge cases

Rehearsal Plan

Policy requires behavioral, edge case, and performance validation to ensure deployment safety

Rehearsal Results

Most tests passed, but undefined tiers defaulted to 0, blocking requests. Issue detected safely

Issue Handling

Deployment blocked automatically. Issue routed to developer with rehearsal evidence for correction

Description Change

Modify API rate limiting from fixed 100/min to dynamic user-tier limits. All tier rules must handle edge cases

Tier Boundaries: Free, Pro, Enterprise tier limits defined and tested
Edge Cases: Handle tier changes mid-window and undefined or null users

Rehearsal Plan

Policy requires behavioral, edge case, and performance validation to ensure deployment safety

Behavioral Testing: Verify tier boundaries and user interactions
Performance Testing: Simulate load at 10x expected peak traffic

Rehearsal Results

Most tests passed, but undefined tiers defaulted to 0, blocking requests. Issue detected safely

Successes: Tier boundaries handled correctly
Failure: Undefined tier defaults to 0

Issue Handling

Deployment blocked automatically. Issue routed to developer with rehearsal evidence for correction

Automatic Gate: Prevents production deployment
Developer Guidance: Rehearsal evidence provided for quick fix

Metrics

Measurable Rehearsal Impact

Metrics show how execution rehearsals prevent production incidents, catch issues early, and provide full audit evidence

75% reduction

Rehearsals reduce production incidents significantly

100% rehearsed

Every change is validated before deployment

40% of issues

Rehearsals catch issues missed by unit tests

Complete audit trail

Logs what was rehearsed, passed, and failed

FAQ

Frequently Asked Questions

How does Context OS rehearse code before deployment?

Context OS simulates execution across all scenarios, catching issues before production deployment occurs

Can rehearsal catch issues missed by unit tests?

Yes, 40% of issues are detected in rehearsal that unit tests do not catch

What happens when a rehearsal fails?

Failed rehearsals automatically block deployment and route the issue to the correct reviewer

How is compliance and audit ensured?

Every rehearsal is logged, including scenarios tested, outcomes, and approval evidence for audits

Rehearse in simulation. Deploy with proof. Production is no longer the test.

Context OS lets you rehearse every change in simulation, ensuring deployments are safe and fully validated before production

Operations & SRE

Security & SOC

Risk & Compliance

Finance & Procurement

Agentic Debugging