Reviewing Operating-Context Drift and Policy Leaks¶

Page Maps¶

graph LR
  family["Reproducible Research"]
  program["Deep Dive Snakemake"]
  section["Operating Contexts Execution Policy"]
  page["Reviewing Operating-Context Drift and Policy Leaks"]
  capstone["Capstone evidence"]

  family --> program --> section --> page
  page -.applies in.-> capstone

flowchart LR
  orient["Orient on the page map"] --> read["Read the main claim and examples"]
  read --> inspect["Inspect the related code, proof, or capstone surface"]
  inspect --> verify["Run or review the verification path"]
  verify --> apply["Apply the idea back to the module and capstone"]

Operating-context drift is rarely dramatic at first.

It usually arrives through small decisions that seem harmless:

one more profile-specific tweak
one more context-specific path override
one more retry increase
one more undocumented storage assumption

This page is about catching those leaks before they rewrite workflow behavior by accident.

Operating-context review is different from ordinary workflow review¶

A normal workflow review asks:

does the DAG still make sense?
do the rules still declare the right contracts?

An operating-context review asks:

do different contexts still mean the same workflow?
are profile differences still policy rather than semantics?
are storage, failure, and visibility assumptions still explicit?

Those questions overlap, but they are not the same.

Drift becomes visible when contexts are compared side by side¶

The capstone's profile-audit route is valuable because it compares:

profile config files
dry-runs under multiple contexts
review questions about policy versus meaning

That is exactly the right posture.

Drift stays harder to see when each context is inspected in isolation.

One useful review loop¶

flowchart LR
  change["profile or context change"] --> compare["compare policy files and dry-runs"]
  compare --> classify["policy difference or semantic leak?"]
  classify --> keep["keep as operating policy"]
  classify --> escalate["escalate to workflow, config, or contract review"]

This loop matters because context drift often hides behind the phrase “environment-specific adjustment.”

What to inspect first¶

Start with four practical questions:

Do the context differences stay within executor, logging, latency, or retry policy?
Did any context introduce different paths, different semantic config, or different trusted outputs?
Are failures being explained better, or merely retried more often?
Are storage and visibility assumptions named clearly enough for another maintainer to audit them?

These questions make policy leaks visible early.

A weak review posture¶

Weak shape:

profiles are approved one at a time with no cross-context comparison
“works on the cluster” is treated as sufficient justification
policy changes are merged before anyone asks whether the workflow meaning drifted

This lets execution context become a hidden author of workflow behavior.

A stronger review posture¶

Stronger shape:

compare local, CI, and scheduler contexts side by side
treat policy differences as acceptable only when workflow meaning remains stable
escalate suspicious differences into config, contract, or workflow review
keep evidence bundles or review notes that explain why the drift is acceptable or not

Now the repository can move across contexts without losing its semantic center.

Common failure modes¶

Failure mode	Why it is risky	Better repair
context-specific semantic knobs are hidden in profiles	one workflow becomes several hidden variants	move semantics into visible workflow or config surfaces
cluster migration relies on unreviewed storage differences	path trust changes without being named	audit filesystem and visibility assumptions explicitly
retries rise as contexts get noisier	deterministic defects stay mislabeled as transient	classify failure modes before altering policy
dry-runs are never compared across contexts	semantic drift stays invisible	compare planned work across local, CI, and scheduler profiles
policy review happens without evidence	context changes become anecdotal	use audit bundles, dry-runs, and guide routes as review evidence

The explanation a reviewer trusts¶

Strong explanation:

these context differences remain operating policy because the dry-run plan, contract paths, config meaning, and trusted outputs stay stable across local, CI, and SLURM; the remaining differences are executor and observability policy only.

Weak explanation:

each environment needs its own behavior, so exact comparison is not very useful.

The strong explanation checks invariants. The weak explanation excuses drift before it is examined.

End-of-page checkpoint¶

Before leaving this page, you should be able to:

explain how operating-context review differs from ordinary workflow review
name several signs of a policy leak
explain why side-by-side dry-run comparison is valuable
describe when a profile change should escalate into semantic review