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jeremy merged 2 commits into from
Mar 7, 2026
Merged

Privilege-separate AI labeler workflows #10

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8c49161
Migrate to privilege-separated AI workflows and harden release permis…
jeremy Mar 7, 2026
f865c17
Fix file-patterns to match actual library packages
jeremy Mar 7, 2026
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226 changes: 20 additions & 206 deletions .github/workflows/ai-labeler.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,211 +16,25 @@ permissions:

jobs:
classify:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

- name: Build prompt
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
PR: ${{ github.event.pull_request.number }}
run: |
gh pr diff "$PR" > /tmp/pr.diff
gh pr view "$PR" --json title --jq .title > /tmp/pr-title.txt
gh pr view "$PR" --json body --jq '.body // ""' > /tmp/pr-body.txt

# Compose user message
{
printf 'PR #%s: %s\n' "$PR" "$(cat /tmp/pr-title.txt)"
echo ""
cat /tmp/pr-body.txt
echo ""
echo "Diff (truncated):"
head -c 100000 /tmp/pr.diff
} > /tmp/user-message.txt

# Build full prompt YAML: splice user message into the messages array
python3 -c "
with open('.github/prompts/classify-pr.prompt.yml') as f:
lines = f.readlines()
with open('/tmp/user-message.txt') as f:
user_msg = f.read()

insert_at = len(lines)
for i, line in enumerate(lines):
if i == 0:
continue
if line.strip() and not line[0].isspace():
insert_at = i
break

entry = [' - role: user\n', ' content: |\n']
for ln in user_msg.splitlines():
entry.append(' ' + ln + '\n')

lines[insert_at:insert_at] = entry
with open('/tmp/prompt.yml', 'w') as f:
f.writelines(lines)

try:
import yaml
doc = yaml.safe_load(open('/tmp/prompt.yml'))
assert doc['messages'][-1]['role'] == 'user', 'prompt splice failed'
except ImportError:
pass
"

- name: Classify
id: classify
uses: actions/ai-inference@e09e65981758de8b2fdab13c2bfb7c7d5493b0b6 # v2.0.7
with:
prompt-file: /tmp/prompt.yml

- name: Apply label
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
RESPONSE_FILE: ${{ steps.classify.outputs.response-file }}
PR: ${{ github.event.pull_request.number }}
run: |
LABEL=$(jq -r '.label // empty' "$RESPONSE_FILE" 2>/dev/null || cat "$RESPONSE_FILE")
LABEL=$(printf '%s' "$LABEL" | tr -d '[:space:]' | tr '[:upper:]' '[:lower:]')
case "$LABEL" in
bug|enhancement|documentation) ;;
*) echo "Unexpected: $LABEL — skipping"; exit 0 ;;
esac
CURRENT=$(gh pr view "$PR" --json labels --jq '.labels[].name')
for L in bug enhancement documentation; do
if [ "$L" != "$LABEL" ] && echo "$CURRENT" | grep -qx "$L"; then
gh pr edit "$PR" --remove-label "$L" 2>/dev/null || true
fi
done
if ! echo "$CURRENT" | grep -qx "$LABEL"; then
gh pr edit "$PR" --add-label "$LABEL" 2>/dev/null || true
fi
uses: basecamp/.github/.github/workflows/ai-classify-pr.yml@fc560544cd2bb4e242530bde9b0d9deb7863ea45
with:
prompt-file: .github/prompts/classify-pr.prompt.yml
labels: "bug,enhancement,documentation"
permissions:
contents: read
issues: write
models: read
pull-requests: write

breaking:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

- name: Build prompt
id: api-diff
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
PR: ${{ github.event.pull_request.number }}
run: |
gh pr diff "$PR" > /tmp/full.diff

# Filter diff to exported Go library files (not tests, seed, or non-package dirs)
python3 -c "
import sys, re
diff = open('/tmp/full.diff').read()
dir_exclude = ('seed/', 'internal/', 'actions/', 'prompts/', 'skills/')
sections = re.split(r'(?=^diff --git)', diff, flags=re.MULTILINE)
for s in sections:
m = re.match(r'diff --git a/(\S+)', s)
if m:
path = m.group(1)
if path.endswith('.go') and not path.endswith('_test.go') and not any(path.startswith(d) for d in dir_exclude):
sys.stdout.write(s)
" > /tmp/api.diff

if [ ! -s /tmp/api.diff ]; then
echo "skip=true" >> "$GITHUB_OUTPUT"
else
TITLE=$(gh pr view "$PR" --json title --jq .title)

{
printf 'PR #%s: %s\n' "$PR" "$TITLE"
echo ""
echo "Diff of exported Go library files:"
head -c 100000 /tmp/api.diff
} > /tmp/user-message.txt

python3 -c "
with open('.github/prompts/detect-breaking.prompt.yml') as f:
lines = f.readlines()
with open('/tmp/user-message.txt') as f:
user_msg = f.read()

insert_at = len(lines)
for i, line in enumerate(lines):
if i == 0:
continue
if line.strip() and not line[0].isspace():
insert_at = i
break

entry = [' - role: user\n', ' content: |\n']
for ln in user_msg.splitlines():
entry.append(' ' + ln + '\n')

lines[insert_at:insert_at] = entry
with open('/tmp/prompt.yml', 'w') as f:
f.writelines(lines)

try:
import yaml
doc = yaml.safe_load(open('/tmp/prompt.yml'))
assert doc['messages'][-1]['role'] == 'user', 'prompt splice failed'
except ImportError:
pass
"
echo "skip=false" >> "$GITHUB_OUTPUT"
fi

- name: Detect breaking changes
if: steps.api-diff.outputs.skip != 'true'
id: detect
uses: actions/ai-inference@e09e65981758de8b2fdab13c2bfb7c7d5493b0b6 # v2.0.7
with:
prompt-file: /tmp/prompt.yml

- name: Apply breaking label
if: steps.api-diff.outputs.skip != 'true'
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
RESPONSE_FILE: ${{ steps.detect.outputs.response-file }}
PR: ${{ github.event.pull_request.number }}
run: |
if [ -z "$RESPONSE_FILE" ] || [ ! -f "$RESPONSE_FILE" ]; then
echo "::warning::Model response file is missing; skipping breaking label."
exit 0
fi
if ! jq empty "$RESPONSE_FILE" 2>/dev/null; then
echo "::warning::Model response is not valid JSON; skipping breaking label."
{
echo "## Breaking change detection failed"
echo "Model returned invalid JSON. Breaking label was **not** applied."
if [ -s "$RESPONSE_FILE" ]; then
echo '```'
cat "$RESPONSE_FILE"
echo '```'
fi
} >> "$GITHUB_STEP_SUMMARY"
exit 0
fi
BREAKING=$(jq -r '.breaking' "$RESPONSE_FILE")

if [ "$BREAKING" = "true" ]; then
ITEMS=$(jq -r '.items[]' "$RESPONSE_FILE" | sed 's/^/- /')
gh label create breaking --color "B60205" 2>/dev/null || true
gh pr edit "$PR" --add-label "breaking"

{
echo "**Potential breaking changes detected:**"
echo ""
echo "$ITEMS"
echo ""
echo "_Review carefully before merging. Consider a major version bump._"
} > /tmp/breaking-comment.md

EXISTING=$(gh pr view "$PR" --json comments --jq '.comments[] | select(.body | startswith("**Potential breaking")) | .id' | head -1)
if [ -n "$EXISTING" ]; then
gh api graphql -f query="mutation { updateIssueComment(input: {id: \"$EXISTING\", body: $(jq -Rs . /tmp/breaking-comment.md)}) { issueComment { id } } }"
else
gh pr comment "$PR" --body-file /tmp/breaking-comment.md
fi
else
gh pr edit "$PR" --remove-label "breaking" 2>/dev/null || true
fi
uses: basecamp/.github/.github/workflows/ai-breaking-change.yml@fc560544cd2bb4e242530bde9b0d9deb7863ea45
with:
prompt-file: .github/prompts/detect-breaking.prompt.yml
file-patterns: |
internal/commands/*.go
cmd/*/main.go
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permissions:
contents: read
issues: write
models: read
pull-requests: write
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