# TAP v0.2: Now Your Commits Tell the Truth _2026-07-18_ > TAP v0.2 adds Git and File profiles. Your commits now record which model did what, at which version, in which role - not just "Co-Authored-By Claude." Every AI-assisted commit on GitHub today looks the same: ``` Fix parser edge case Co-Authored-By: Claude ``` Opus 4.8 or Sonnet 5 - same line. Architect or typist - same line. One model or three - same line. The human who directed everything is invisible. This is what TAP v0.2 fixes. ## What changed TAP v0.1 covered web pages - bylines, `data-*` attributes, JSON-LD. It answered "who wrote this article." v0.2 extends TAP to **code**: - **Profile: Git** - provenance in commit trailers (`TAP-Human`, `TAP-Model`), parsed by standard `git interpret-trailers`, greppable, aggregable. - **Profile: File** - provenance in file headers (YAML frontmatter for `.md`, comments for `.py`/`.sh`). - **Timestamp & Immutability** - three tiers from free (git timestamps) through recommended (Archive.org Save Page Now) to cryptographic (OpenTimestamps). - **Core vocabulary** formalized - `model`, `provider`, `role`, `human`, `confidence` defined once, carried by every profile. ## Before and after **Default Claude Code commit:** ``` Fix parser edge case 🤖 Generated with Claude Code Co-Authored-By: Claude ``` Lost: which Claude, what role, who directed. Every model version collapses into one GitHub account. **Same commit, with TAP:** ``` Fix parser edge case Co-Authored-By: Alex TAP-Human: Alex ; handle=@shelly-im; role=ideation,review Co-Authored-By: Claude TAP-Model: Claude Opus 4.8 ; model=claude-opus-4-8; provider=anthropic; platform=claude-code; role=drafting ``` GitHub renders the same avatars. But now every party is typed, every model versioned, roles explicit. ## Multi-model: the real power When Opus architects and Sonnet writes, the default commit flattens both into one "Claude" line. With TAP: ``` Refactor auth middleware Co-Authored-By: Alex TAP-Human: Alex ; handle=@shelly-im; role=ideation,review Co-Authored-By: Claude TAP-Model: Claude Opus 4.8 ; model=claude-opus-4-8; provider=anthropic; role=review,synthesis,architecture TAP-Model: Claude Sonnet 5 ; model=claude-sonnet-5; provider=anthropic; role=drafting ``` One `Co-Authored-By` (one avatar), two `TAP-Model` lines. Architect vs worker visible. ## What this unlocks Standard git tools, zero infrastructure: ```bash # All commits where Opus 4.8 contributed git log --grep='TAP-Model:.*claude-opus-4-8' # Contribution breakdown by model git shortlog --group=trailer:tap-model # Who reviewed what git log --grep='TAP-.*role=.*review' ``` No plugins. No platforms. Just trailers and grep. ## Why it matters Code is where the authorship question is most acute and least addressed. Every developer using Cursor, Claude Code, Copilot, or Windsurf is generating AI-assisted commits. Almost none record which model, which version, which role. Six months from now, when a codebase has 10,000 commits from three different model generations, that provenance is gone. TAP keeps it, at the cost of two extra lines per commit. ## Try it The full spec is on [GitHub](https://github.com/liza-emergence/TAP/blob/main/SPEC.md). The visual before/after is on [emergenti.dev](https://emergenti.dev/#git). The protocol is CC BY 4.0 - use it, fork it, improve it.