How Saykai Handles Nondeterminism

Safe CI gating for systems that aren’t perfectly repeatable.

Modern systems are not deterministic.

Robots, agents, simulations, and real-world workflows all exhibit noise, variance, and timing drift. Saykai is built for that reality.

Saykai enforces safety gates based on meaningful behavioral change, not one-off variance or flaky execution.

THE CORE PRINCIPLE

Gate on behavioral regressions, not noise.

Saykai does not require bit-for-bit identical replays. It evaluates whether system behavior has changed outside an accepted baseline.

This allows teams to enforce safety in CI without introducing instability.

What This Means in Practice

01 // BASELINES

Behavioral Baselines, Not Exact Matches

Saykai compares runs against behavioral envelopes, not single frozen traces. Baselines can include acceptable outcome ranges, invariant conditions, and tolerance bounds defined by the team.

This preserves natural variation while still detecting regressions.

STOCHASTIC BEHAVIOR SAFETY SPEC CHECKING ENVELOPE PASS Within Bounds BLOCK Regression

Behavior is evaluated across multiple runs, not against a single expected output.

02 // CONSISTENCY

Consistency Over One-Offs

For MVP and early pilots:

  • scenarios can be re-run automatically
  • a gate fails only when regressions are consistent
  • single noisy failures do not block merges

This dramatically reduces false positives while preserving signal.

03 // VISIBILITY

Variance Is Recorded

Every Safety Pack records:

  • observed variance
  • comparison against baseline bounds
  • pass or fail rationale

Nondeterminism is explicit and reviewable, not buried in logs.

04 // ENFORCEMENT

Enforcement Can Start Soft

Teams can run Saykai in:

  • report-only mode
  • warn-on-fail mode
  • block-on-fail mode

This allows trust to build before enforcement becomes mandatory.

05 // OVERRIDES

Explicit Overrides

No safety system should silently halt progress. Saykai supports:

  • explicit human overrides
  • documented rationale
  • permanent traceability

Overrides preserve accountability without bypassing safety.

What Saykai Does Not Claim

Saykai does not claim:

  • perfect determinism
  • zero false positives
  • autonomous judgment without human context

Saykai provides structured evidence and enforcement, not blind automation.

Designed for High-Stakes Systems

This approach is built for:

  • robotics and simulation-heavy systems
  • autonomous and semi-autonomous agents
  • workflows where regressions are expensive
  • environments where “just rerun it” is not acceptable

If your system must change safely, nondeterminism must be handled explicitly.

BOTTOM LINE

Saykai blocks unsafe change.
Not natural variation.

That’s the standard required for real safety gates in CI.

Run Saykai against your own scenarios.

See how behavioral gating works in your CI pipeline.

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