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Understand the why, not just the what
Newsletters explain the decisions, trade-offs, and reasoning behind your code — not just what it does, but why it was built that way.
Vol. 01 — Weekly dispatchOpen source
Weekly newsletters that document your codebase
You could ask an AI about your codebase — Abstractions just doesn't wait for you to. Weekly digests of architectural changes, system relationships, and patterns, delivered automatically.
- License
- AGPL-3.0
- Models
- Bring your own key
- Your source
- Never stored
AbstractionsIssue 14
payments-service
Idempotency keys moved to Redis
Payment retries are now deduplicated at the gateway rather than in the database. The team moved idempotency keys into Redis to close the race condition surfaced during the March incident.
Why it matters
Duplicate charges were possible when a client retried before the first write committed. Centralising the key check removes that window without adding a second round-trip to Postgres.
About this newsletterFiles covered:
gateway/retry.gostore/idempotency.goThis content is AI-generated. Suggested improvements may not apply to your codebase — review them with that in mind.§ 01The problem
Context debt is silently killing your team's velocity
The faster you ship, the harder it becomes for everyone on the team to understand how everything fits together.
person_search
New hires can't keep up
PRs merge faster than onboarding docs can keep pace. New engineers spend weeks just building a mental model.
memory
Senior engineers start forgetting
How did we handle auth again? Which service owns rate-limiting? Context gets lost as codebases evolve.
history_edu
Decisions get made without history
Why did we pick this pattern? What trade-offs did we consider? That reasoning lives in someone's head — or nowhere at all.
§ 02Why Abstractions
Solve context debt with the right tools
Keep your entire team aligned with your codebase. Automatic, always fresh.
02speed
Onboard engineers in days, not weeks
New hires get instant access to an AI-generated guide to your codebase. Understand patterns, decisions, and dependencies on day one.
03sync
Doesn't wait for you to ask
You could ask an AI assistant about your codebase — but that only surfaces what you think to ask about. Abstractions watches your repos, figures out a topic on its own, and tells you before you knew to ask.
04code
Open source, run it your way
Licensed under AGPL-3.0. Inspect every line, self-host on your own infrastructure, or use the hosted product — same codebase either way. Your data stays yours.
§ 03How it works
From commit history to inbox in four steps
Abstractions connects to your GitHub repositories, deeply indexes your codebase, and delivers AI-generated newsletters on a schedule you control.
- 01cable
Connect GitHub
Authorize your repositories — public or private — with a scoped OAuth connection.
- 02manage_search
Index the codebase
We analyze commits and PRs, chunk the code, and map concepts into a topic graph.
- 03auto_awesome
Generate the newsletter
Your model of choice drafts a readable changelog from the indexed context.
- 04mark_email_read
Deliver to the team
Ships to your engineers on the schedule you control — or on demand, anytime.
§ 04FAQ
Frequently asked questions
Everything you need to know about how Abstractions works. Anything else — the answer is probably in the docs.
Next issue ships Monday
Ready to keep your team in sync?
Sign up for the hosted product, or clone the open-source repo and run it yourself. Your first newsletter can ship next Monday.