Normalized Editorial Inbox batch
Claude Opus 5 Turns Prompting Into Harness Calibration
Anthropic's Opus 5 prompting guide shows model upgrades changing the harness contract: verbosity, progress updates, scope, subagents, verification, and thinking mode all need retuning.
Signal contract
Anthropic's Opus 5 prompting guide shows model upgrades changing the harness contract: verbosity, progress updates, scope, subagents, verification, and thinking mode all need retuning. This official-source record adds evidence that model upgrades are no longer just capability changes; they force prompt, effort, delegation, and verification policies to move with the runtime. Novelty: structural. Verification: source-inspected.
Source ledger
Publishable sources attached to this record.
| # | Source | Role | Public status |
|---|---|---|---|
| 1 | platform.claude.comdocs | primary receipt | source_urls |
Observation
Anthropic's Opus 5 prompting guide shows model upgrades changing the harness contract: verbosity, progress updates, scope, subagents, verification, and thinking mode all need retuning.
Why it matters
This official-source record adds evidence that model upgrades are no longer just capability changes; they force prompt, effort, delegation, and verification policies to move with the runtime.
Entities
Anthropic, Claude
Provenance
This public record is a sanitized New Runtime Editorial Inbox signal. Linked source_urls carry the publishable evidence boundary; private discovery provenance stays internal.