[Protonmatter]

Outcome

Claude Code sessions in this repository stop adding attribution to commits and pull request descriptions. Today they add a Co-Authored-By trailer, a "Generated with Claude Code" PR footer and a Claude-Session link. After this change they add none of these.

Specification and traceability

• Requirements: Not applicable (tooling configuration only)
• RFC: Not required: no product or contract change
• ADR: Not required: no architectural change
• Governing specification: Claude Code settings reference, attribution key (https://code.claude.com/docs/en/settings-reference.md)
• Non-goals: the footer Claude Code adds to GitHub comments and reviews it posts. No setting for that footer is documented.

Correctness and risk

• Inputs, outputs, and failure behavior: adds attribution: {commit: "", pr: "", sessionUrl: false} to .claude/settings.json. An empty string hides that attribution line.
• Compatibility or migration: the existing marketplace and plugin entries are unchanged. includeCoAuthoredBy is deprecated and is not used here.
• Scientific/accuracy/provenance impact: none.
• Privacy/security/dependency impact: none.
• Release risk, monitoring, and rollback:
  • The docs say a committed project .claude/settings.json is read in single-repo cloud sessions.
  • They do not explicitly confirm commit/pr behavior in cloud sessions, so confirm on the next session.
  • Rollback: revert this commit.

UI and UX

Not applicable.

Validation evidence

• Unit tests cover positive, boundary, and negative cases where applicable. (Not applicable)
• Contract/integration tests cover producer-consumer boundaries where applicable. (Not applicable)
• Browser end-to-end and visual assertions cover user-visible rendering where applicable. (Not applicable)
• Deterministic generation/accuracy checks pass where applicable. (Not applicable)
• Rust, Python, Node, and whole-web coverage gates remain at least 90%. (Unaffected; left to CI)
• Locally unavailable checks are named and left to required CI.

Commands and results:

python3 -m json.tool .claude/settings.json   -> valid JSON
python3 tools/validate_sdlc.py               -> OK: SDLC, 27 requirements, RFCs, evidence paths, and workflows validate.

Documentation

• README and contributor instructions remain accurate.
• Specifications, requirements, RFC/ADR, and implementation plan are updated. (None affected)
• Operations, readiness, status, roadmap, and handoff are updated when affected. (None affected)
• User-visible claims and help match implemented behavior.

Note: .claude/ is listed in .gitignore, but settings.json is already tracked, so changes to it are still committed.