Source: https://seerepo.com/r/rails/rails/ai
Markdown source: https://seerepo.com/r/rails/rails/ai.md
Description: AI signed 0.2% of the 73,707 commits of rails. Each AI tool with its commits, and the last ones it signed.

# How much of rails did AI write?

AI signed 0.2% of the 73,707 commits of rails. Signed by Claude (149), Cursor (3), Amp (1), Codex (1), GitHub Copilot (1), and Gemini (1).

Since its first commit, on November 24, 2004.

## Who signed the commits

- Claude: 149 commits (0.2%)
- Cursor: 3 commits (0%)
- Amp: 1 commit (0%)
- Codex: 1 commit (0%)
- GitHub Copilot: 1 commit (0%)
- Gemini: 1 commit (0%)
- People: 99.8%

## Commits per month

Each month's commits up to its last one, with those an AI signed. Merges don't count.

- 2024-11: 152 commits, 0 signed by AI (0%)
- 2024-12: 214 commits, 0 signed by AI (0%)
- 2025-01: 180 commits, 0 signed by AI (0%)
- 2025-02: 156 commits, 0 signed by AI (0%)
- 2025-03: 101 commits, 0 signed by AI (0%)
- 2025-04: 72 commits, 0 signed by AI (0%)
- 2025-05: 62 commits, 0 signed by AI (0%)
- 2025-06: 57 commits, 0 signed by AI (0%)
- 2025-07: 113 commits, 0 signed by AI (0%)
- 2025-08: 151 commits, 0 signed by AI (0%)
- 2025-09: 198 commits, 0 signed by AI (0%)
- 2025-10: 201 commits, 0 signed by AI (0%)
- 2025-11: 119 commits, 1 signed by AI (0.8%)
- 2025-12: 161 commits, 0 signed by AI (0%)
- 2026-01: 118 commits, 0 signed by AI (0%)
- 2026-02: 102 commits, 1 signed by AI (1%)
- 2026-03: 96 commits, 1 signed by AI (1%)
- 2026-04: 50 commits, 2 signed by AI (4%)
- 2026-05: 265 commits, 8 signed by AI (3%)
- 2026-06: 335 commits, 5 signed by AI (1.5%)
- 2026-07: 286 commits, 8 signed by AI (2.8%)
- 2026-08: 250 commits, 13 signed by AI (5.2%)
- 2026-09: 189 commits, 20 signed by AI (10.6%)
- 2026-10: 388 commits, 96 signed by AI (24.7%)

## The last commits an AI signed

- 2026-10-27 · Claude · [5171e07](https://github.com/rails/rails/commit/5171e07bf82a71aa455e566ba6f4a0fb6d0e450d): Serialize perform_work with a connection's commands
- 2026-10-27 · Claude · [c82ad5f](https://github.com/rails/rails/commit/c82ad5f78510b76dd9700fcbb0621622c96c23c3): Don't render authenticity tokens under the header_only CSRF strategy
- 2026-10-27 · Claude · [2f6d23f](https://github.com/rails/rails/commit/2f6d23fd98472a0b59f93be3e6f92535f1cb943f): Round a BigDecimal whose scale overflows, and keep tolerating a falsy scale
- 2026-10-27 · Claude · [65e5cc7](https://github.com/rails/rails/commit/65e5cc7597232e2380e3eb61cf4f1edcd0210640): Assert the scale boundary returns the BigDecimal as is
- 2026-10-27 · Claude · [2d36413](https://github.com/rails/rails/commit/2d364133aba48836123afa25a958e724ac15a8c4): Skip copying and rounding a BigDecimal already at the decimal type's scale
- 2026-10-27 · Claude · [4281719](https://github.com/rails/rails/commit/42817193598f7453afbdb2efcfa23c8aad46dbec): Test a TimeWithZone whose UTC time was moved to another offset
- 2026-10-27 · Claude · [054035d](https://github.com/rails/rails/commit/054035dc7c1d4416c735e6fc8f26c4342e734c95): Load MessagePack TimeWithZone from a UTC Time
- 2026-10-25 · Claude · [d0a6b57](https://github.com/rails/rails/commit/d0a6b575ebd4cd99fdfa7f936cbd306d2411a0d8): Process each Action Cable connection's commands in order
- 2026-10-25 · Claude · [d12aa07](https://github.com/rails/rails/commit/d12aa07b5c56a800c32abea7bf0655af06678a93): Use Symbol#name for attribute names in Active Record attribute APIs
- 2026-10-25 · Claude · [0630c68](https://github.com/rails/rails/commit/0630c6860538d6feb533a94a1526cb10f5a22745): Check the serializer format with Symbol#start_with? instead of to_s

## How we know

Every AI coding tool leaves its signature in the commits it makes: a Co-Authored-By line, its own author name, or the merge of its branch. SeeRepo reads those signatures in the repo's history; a commit without one counts as made by people, and merges don't count.

Every AI tool SeeRepo recognizes: https://seerepo.com/agents

## Frequently asked questions

### Which AI tool signed the most commits in rails?

Claude, with 149 of the 73,707 commits of rails.

The proof: [its last signed commit, 5171e07](https://github.com/rails/rails/commit/5171e07bf82a71aa455e566ba6f4a0fb6d0e450d)

### Since when does AI sign commits in rails?

Since November 2025: the first month an AI tool signed a commit of rails.

### How many commits does rails have?

rails has 73,707 commits since November 24, 2004. Merges don’t count.

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.