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| 1 | +# This workflow is provided via the organization template repository |
| 2 | +# |
| 3 | +# https://github.com/nextcloud/.github |
| 4 | +# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization |
| 5 | +# |
| 6 | +# SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors |
| 7 | +# SPDX-License-Identifier: MIT |
| 8 | + |
| 9 | +name: AI Policy |
| 10 | + |
| 11 | +on: |
| 12 | + pull_request: |
| 13 | + types: [opened, synchronize, reopened] |
| 14 | + branches: [master, main] |
| 15 | + |
| 16 | +permissions: |
| 17 | + contents: read |
| 18 | + # Required to add the "AI assisted" label via `gh pr edit --add-label` |
| 19 | + pull-requests: write |
| 20 | + # Required to create the "AI assisted" label via the REST labels endpoint |
| 21 | + # (labels are an issues-scoped resource in the GitHub API) |
| 22 | + issues: write |
| 23 | + |
| 24 | +concurrency: |
| 25 | + group: ai-policy-${{ github.head_ref || github.run_id }} |
| 26 | + cancel-in-progress: true |
| 27 | + |
| 28 | +jobs: |
| 29 | + check-ai-trailers: |
| 30 | + runs-on: ubuntu-latest |
| 31 | + steps: |
| 32 | + - name: Checkout |
| 33 | + uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1 |
| 34 | + with: |
| 35 | + fetch-depth: 0 |
| 36 | + persist-credentials: false |
| 37 | + |
| 38 | + - name: Collect PR commit messages |
| 39 | + id: collect |
| 40 | + env: |
| 41 | + BASE_REF: ${{ github.base_ref }} |
| 42 | + run: | |
| 43 | + set -euo pipefail |
| 44 | + git fetch origin "${BASE_REF}" |
| 45 | + MERGE_BASE=$(git merge-base "origin/${BASE_REF}" HEAD) |
| 46 | + git log --format="%B" "${MERGE_BASE}..HEAD" > /tmp/pr_commits.txt |
| 47 | + echo "--- PR commit messages ---" |
| 48 | + cat /tmp/pr_commits.txt |
| 49 | + echo "--------------------------" |
| 50 | +
|
| 51 | + - name: Define shared agent detection patterns |
| 52 | + run: | |
| 53 | + set -euo pipefail |
| 54 | +
|
| 55 | + # Email addresses known to be used by coding agents. |
| 56 | + # These should never appear in Signed-off-by because the DCO can only be attested by a human. |
| 57 | + EMAIL_PATTERN="copilot@github\.com\ |
| 58 | + |noreply@anthropic\.com\ |
| 59 | + |devin@cognition\.ai\ |
| 60 | + |devin@cognition-labs\.com\ |
| 61 | + |aider@aider\.chat\ |
| 62 | + |noreply@aider\.chat\ |
| 63 | + |codex@openai\.com\ |
| 64 | + |cursor@anysphere\.com\ |
| 65 | + |windsurf@codeium\.com\ |
| 66 | + |codeium@codeium\.com\ |
| 67 | + |amazon-q@amazon\.com\ |
| 68 | + |codewhisperer@amazon\.com\ |
| 69 | + |gemini-code-assist@google\.com\ |
| 70 | + |openhands@all-hands\.dev\ |
| 71 | + |swe-agent@princeton\.edu" |
| 72 | +
|
| 73 | + # Strip embedded whitespace (used above only for readability) |
| 74 | + EMAIL_PATTERN=$(echo "$EMAIL_PATTERN" | tr -d ' \n') |
| 75 | + echo "AGENT_EMAIL_PATTERN=${EMAIL_PATTERN}" >> "$GITHUB_ENV" |
| 76 | +
|
| 77 | + # Display-name prefixes used by known coding agents (shared by Signed-off-by and Co-Authored-By checks) |
| 78 | + # shellcheck disable=SC2016 |
| 79 | + echo 'AGENT_NAMES=GitHub Copilot|Claude( [A-Za-z0-9. -]+)?|Devin( AI)?|aider( \(.*\))?|OpenAI Codex|Cursor( AI)?|Windsurf|Amazon Q|CodeWhisperer|Gemini Code Assist|OpenHands|SWE-agent|AutoCodeRover|Tabnine' >> "$GITHUB_ENV" |
| 80 | +
|
| 81 | + - name: Check for AI-assistant / Assisted-by trailers |
| 82 | + id: ai_trailers |
| 83 | + run: | |
| 84 | + set -euo pipefail |
| 85 | + AI_ASSISTED=false |
| 86 | + if grep -qiE '^(AI-assistant|Assisted-by):' /tmp/pr_commits.txt; then |
| 87 | + AI_ASSISTED=true |
| 88 | + echo "Found AI-assistant/Assisted-by trailer(s):" |
| 89 | + grep -iE '^(AI-assistant|Assisted-by):' /tmp/pr_commits.txt |
| 90 | + fi |
| 91 | + echo "ai_assisted=${AI_ASSISTED}" >> "$GITHUB_OUTPUT" |
| 92 | +
|
| 93 | + - name: Check for coding-agent Signed-off-by trailers |
| 94 | + id: agent_signoff |
| 95 | + run: | |
| 96 | + set -euo pipefail |
| 97 | +
|
| 98 | + EMAIL_HITS=$(grep -iE "^Signed-off-by:.*<(${AGENT_EMAIL_PATTERN})>" /tmp/pr_commits.txt 2>/dev/null || true) |
| 99 | + NAME_HITS=$(grep -iE "^Signed-off-by: *(${AGENT_NAMES}) *[<(]" /tmp/pr_commits.txt 2>/dev/null || true) |
| 100 | +
|
| 101 | + AGENT_LINES=$(printf '%s\n%s' "$EMAIL_HITS" "$NAME_HITS" | sort -u | sed '/^[[:space:]]*$/d') |
| 102 | +
|
| 103 | + AGENT_SIGNOFF=false |
| 104 | + if [ -n "$AGENT_LINES" ]; then |
| 105 | + AGENT_SIGNOFF=true |
| 106 | + fi |
| 107 | +
|
| 108 | + echo "agent_signoff=${AGENT_SIGNOFF}" >> "$GITHUB_OUTPUT" |
| 109 | + { |
| 110 | + echo "agent_lines<<AGENT_EOF" |
| 111 | + echo "${AGENT_LINES}" |
| 112 | + echo "AGENT_EOF" |
| 113 | + } >> "$GITHUB_OUTPUT" |
| 114 | +
|
| 115 | + - name: Check for coding-agent Co-Authored-By trailers |
| 116 | + id: co_authored |
| 117 | + run: | |
| 118 | + set -euo pipefail |
| 119 | +
|
| 120 | + EMAIL_HITS=$(grep -iE "^Co-Authored-By:.*<(${AGENT_EMAIL_PATTERN})>" /tmp/pr_commits.txt 2>/dev/null || true) |
| 121 | + NAME_HITS=$(grep -iE "^Co-Authored-By: *(${AGENT_NAMES}) *[<(]" /tmp/pr_commits.txt 2>/dev/null || true) |
| 122 | +
|
| 123 | + CO_AUTHORED=false |
| 124 | + if [ -n "$EMAIL_HITS" ] || [ -n "$NAME_HITS" ]; then |
| 125 | + CO_AUTHORED=true |
| 126 | + echo "Found coding-agent Co-Authored-By trailer(s):" |
| 127 | + printf '%s\n%s' "$EMAIL_HITS" "$NAME_HITS" | sort -u | sed '/^[[:space:]]*$/d' |
| 128 | + fi |
| 129 | +
|
| 130 | + echo "co_authored=${CO_AUTHORED}" >> "$GITHUB_OUTPUT" |
| 131 | +
|
| 132 | + - name: Create 'AI assisted' label if absent |
| 133 | + if: steps.ai_trailers.outputs.ai_assisted == 'true' || steps.agent_signoff.outputs.agent_signoff == 'true' || steps.co_authored.outputs.co_authored == 'true' |
| 134 | + env: |
| 135 | + GH_TOKEN: ${{ github.token }} |
| 136 | + run: | |
| 137 | + gh api "repos/${{ github.repository }}/labels" \ |
| 138 | + --method POST \ |
| 139 | + -f name="AI assisted" \ |
| 140 | + -f color="d93f0b" \ |
| 141 | + -f description="This PR contains AI-assisted commits" \ |
| 142 | + 2>/dev/null || true |
| 143 | +
|
| 144 | + - name: Label PR as AI assisted |
| 145 | + if: steps.ai_trailers.outputs.ai_assisted == 'true' || steps.agent_signoff.outputs.agent_signoff == 'true' || steps.co_authored.outputs.co_authored == 'true' |
| 146 | + env: |
| 147 | + GH_TOKEN: ${{ github.token }} |
| 148 | + run: | |
| 149 | + gh pr edit "${{ github.event.pull_request.number }}" \ |
| 150 | + --repo "${{ github.repository }}" \ |
| 151 | + --add-label "AI assisted" |
| 152 | + echo "Added 'AI assisted' label to PR #${{ github.event.pull_request.number }}" |
| 153 | +
|
| 154 | + - name: Fail on coding-agent Signed-off-by |
| 155 | + if: steps.agent_signoff.outputs.agent_signoff == 'true' |
| 156 | + env: |
| 157 | + AGENT_LINES: ${{ steps.agent_signoff.outputs.agent_lines }} |
| 158 | + AGENTS_MD_URL: https://github.com/${{ github.repository }}/blob/${{ github.base_ref }}/AGENTS.md |
| 159 | + run: | |
| 160 | + echo "::error title=Coding-agent sign-off detected::A Signed-off-by trailer from a known coding agent was found in one or more commits." |
| 161 | + echo "" |
| 162 | + echo "Offending trailer(s):" |
| 163 | + echo "${AGENT_LINES}" |
| 164 | + echo "" |
| 165 | + echo "The 'Signed-off-by' trailer represents the Developer Certificate of Origin (DCO)" |
| 166 | + echo "and must only be attested by a human contributor." |
| 167 | + echo "Please amend the affected commit(s) to remove the coding-agent sign-off" |
| 168 | + echo "and replace it with an 'Assisted-by' trailer, for example:" |
| 169 | + echo "" |
| 170 | + echo " Assisted-by: Claude Code:claude-sonnet-4-6" |
| 171 | + echo "" |
| 172 | + echo "References:" |
| 173 | + echo " • AGENTS.md (this repository)" |
| 174 | + echo " ${AGENTS_MD_URL}" |
| 175 | + echo " • AI Contribution Policy" |
| 176 | + echo " https://github.com/nextcloud/.github/blob/master/AI_POLICY.md" |
| 177 | + echo " • Contribution Guidelines" |
| 178 | + echo " https://github.com/nextcloud/.github/blob/master/CONTRIBUTING.md" |
| 179 | + exit 1 |
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