What I Learned Building an Automation That Runs While I Sleep

Description and use

Automating a daily agent that reads Slack and GitHub, uses bookmarks, confirms posts, and stores state to ensure reliable operation without missing or duplicating updates.

Problem

Automating a daily summary agent that reliably reads Slack and GitHub, handles scheduling, and avoids missing or duplicating items.

Outcome

The agent now runs on schedule, never misses or duplicates items, and provides explicit failure handling, improving reliability for autonomous work.

Workflow

• 1. Read last bookmark for each source
• 2. Fetch new items since bookmark
• 3. Re‑check each item’s status before posting
• 4. Post to Slack and wait for explicit confirmation
• 5. Record successful posts in a persistent ledger
• 6. Update bookmarks
• 7. Enforce spending cap per run

Evidence

I hit three failure modes that kept breaking the system.

Source

The fix was counterintuitive: give the agent a bookmark per source and have it remember where it left off.

Source

Now it waits for Slack's explicit confirmation before recording anything.

Source

The framework I landed on has six rules. Read from bookmarks. Report failures explicitly. Re-check items before posting. Confirm before recording. Keep preferences in a separate read-only store. And cap spending per run.

Source