Claude Code First, specification version 0.1.0. The plain-language guide

Version 0.1.0. Level 1. Best evidence grade R2/S3.

CD-6 Attribution is a stated choice

A project SHOULD state, where its agent reads its commit rules, whether commits carry attribution to the agent.

FieldValue
KeywordSHOULD
Level1
Checkedby judgement
FindingsF205
Harness factsnone
Threatconstruct: authorship by an agent cannot be read from git metadata
Statusactive

Rationale: this rule is decision D1 of ../evidence/divergences.md. The co-author trailer is on 0 to about 7 percent of commits in projects where an agent is the primary author, clustered in time: 76 roadkeep commits up to 2026-09-01 and none of the 423 after it, 24 of winwright's 33 on one day, none in polyweave (F205, R2/S3). No project at its pin states a policy, so the trailer records how a commit was made, not who made the change. No finding records harm from either choice, so the specification requires neither attribution nor its absence; it asks only that the choice be deliberate and written where the agent reads it. Either answer is conforming.