PAT-0380
Silent Mutation
A structural condition where a change occurs without a corresponding declared update, authority update, or version change.
Primary Lenses
Reference Stability Lens
Evaluates whether structural references, identifiers, nodes, and edges remain consistent across execution cycles or comparable states.
Lens Application
The Reference Stability Lens is a primary inspection mechanism for Silent Mutation because it focuses on whether references remain stable between comparable states. It helps surface node, edge, identifier, or linkage changes that appear structurally meaningful but lack matching version, authority, or update signals.
Inspect For
- References that shift while declared version remains unchanged
- Node or edge changes without update metadata
- Identifier reuse after structural alteration
- Divergence between comparable execution states
Avoid
Treat reference drift as an inspection signal requiring comparison against update signals, not as proof that Silent Mutation has occurred.
Determinism Lens
Evaluates whether identical structural inputs produce equivalent structural outputs across repeated executions.
Lens Application
The Determinism Lens is a primary inspection mechanism for Silent Mutation because it checks whether identical structural inputs produce equivalent outputs over repeated runs. Unexpected variation can indicate a change occurring silently, especially when no corresponding version, declaration, or authority update is visible.
Inspect For
- Output drift from identical structural inputs
- Repeated executions producing different structures
- Missing version or authority changes beside changed results
- Undeclared transformations in stable workflows
Avoid
Treat output variation as a signal for closer inspection rather than as proof that Silent Mutation has occurred.
Secondary Lenses
Provenance Trace Lens
Attaches stable lineage to structural regions by mapping origin, reference history, and transformation path.
Lens Application
As a secondary lens, the Provenance Trace Lens helps inspect Silent Mutation indirectly by exposing whether a structural region’s origin, reference path, or transformation trail no longer aligns with its declared version, authority record, or update history.
Inspect For
- Lineage gaps around changed structural regions
- Reference history inconsistent with current structure
- Transformation steps without declared update markers
- Version or authority records unchanged despite altered ancestry
Avoid
Treat provenance mismatch as a supporting inspection signal, not as confirmation that Silent Mutation is present.
Primary Issue Matches
Output Changed Without Declared Change
Output shape, content, format, fields, or behavior changes without a declared change to the prompt, schema, model, workflow, or governing rule.
Prompt Behavior Changed Without Version Change
A prompt begins producing different behavior even though no prompt version, model version, workflow version, or declared dependency change is recorded.
Supporting Issue Matches
Actual Policy Differs From Declared Policy
The policy the AI or workflow actually follows differs from the policy that is documented, declared, displayed, or expected.
Context Changes After Restore
Restoring, reopening, resuming, or reloading a task changes the context that the AI uses to continue the work.
Retry Makes the Problem Worse
A retry, repair attempt, regeneration, or follow-up instruction increases the error, expands the failure, or creates additional breakage instead of narrowing the problem.
Stale Context Affects Output
Old context, prior instructions, outdated references, or earlier task state continue to affect output after they should no longer apply.