All loops
ProductivityMedium 20 min· claude-sonnet-4-5
Screenshot diff → changelog entry
Detect visual diffs in product screenshots, auto-write a changelog blurb.
NOT DEPLOYEDNOT DEPLOYED
0175ms
Trigger
cron(0 7 * * *) fired · every day · 07:00
02835ms
Agent
claude-sonnet-4-5 · in 935 tok · out 234 tok
03225ms
Tools
github-mcp/anthropic:messages.create → 200 OK · 255ms
0465ms
Verify
schema check · zod v3 passed
0595ms
Output
standup drafted · posted to #standups
0655ms
Notify
audit log written · runbook link attached
SUCCESS
0%
0 runs
P50
0ms
median
P95
0ms
tail
AVG COST
—
per run
LAST OK
never
—
LAST FAIL
never
none
Latency · last 30 runs0 samples
no runs yet
Latest output · what your users see
Standup · Platform team
- @norashipped locker health-check endpoint
- @arunreviewing PR #184 (retry jitter)
- @linblocked on Stripe webhook signature rotation
- @devpicking up SEC-914 (S3 bucket audit)
// press Test to run once · Watch live to keep streaming · Deploy to make it real
The problem
Public changelog goes stale because no one wants to write it after every ship.
The outcome
Open the changelog editor on Monday — every visible UI change last week is already drafted.
Ingredients & skills
Secrets
- ANTHROPIC_API_KEY
- GITHUB_TOKEN
Providers
- Anthropic
- GitHub
- Playwright
MCP servers
- github-mcp
#product#changelog#playwright
How it works
Nightly Playwright run captures key product screens. Pixel diff vs yesterday triggers Claude to write a one-paragraph changelog entry tied to the matching git commits.
Step 1
1 — Capture suite
Ten key screens × 2 viewports. Save under `screens/{date}/`.
Step 2
2 — Pixel diff
Use `pixelmatch`. Threshold ~0.05 of pixels differing → flag.
Step 3
3 — Claude with images
Pass the before/after pair and last week's commits as a vision message. Get the entry.
One-line deploy
The button above runs the same command with your saved config. This is the raw CLI form.
bash
locker schedule changelog agent.ts --cron '0 3 * * *'Related loops
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