Solve It Once.
Never Again.

Every team rediscovers the same problems. Lessons Learned keeps a record of what broke, why it broke, and what actually fixed it — shared across every project in your workspace, and read by your AI before it starts the next build.

Deleted library kept reappearing
What went wrong · Delete and re-save raced each other, so the cache repopulated the record after it was removed.
What fixed it · Versioned cache keys, bumped on every mutation.
#lesson #project-billing

Captured in seconds. Available to every project from then on.

Hard-Won Knowledge Keeps Leaking Away

The fix lived in someone's head, a closed ticket, or a Slack thread from four months ago. So the next person pays for it again.

Without a record

  • The same bug is debugged from scratch on a second project
  • Post-mortems get written, filed, and never read again
  • The lesson leaves when the person who learned it leaves
  • Your AI confidently repeats a mistake you already fixed

With Lessons Learned

  • The cause and the fix are written down once, in plain language
  • Every project can draw on what the others learned
  • The record outlives the project that produced it
  • Your AI checks it before starting new work

Three Ways a Lesson Gets Recorded

You can write one yourself, your assistant can write one as it works, or a project can be set up to keep the record from the start.

1. You write it

Open Lessons and click Record a lesson. A short summary, the project it came from, what went wrong and why, and what fixed it. Takes under a minute while it's still fresh.

2. Your AI writes it

Assistants connected to your workspace record a lesson themselves after they hit and resolve something non-obvious — a broken assumption, a fix that took real digging. No form, no prompting.

3. Set at project start

When you set up a new project, Contextium asks whether it should keep a lessons record. Say yes and your assistant maintains it as the work happens, and reads it back at the start of each session.

Then It Gets Used

A record nobody reads is just filing. This one is read before work starts — by people and by your AI.

Read back before the next build

When your assistant resumes a project, it reads the record first — including lessons from projects it has never touched. Debugging something that feels familiar? The answer may already be written down.

One project, or all of them

Tag a lesson to the project it came from and filter down to just that project when you need focus — or view every project at once when you want the pattern across your work.

Onboarding that carries real history

New teammates inherit the traps your team already found, instead of being told "ask around if something breaks." The record is shared workspace-wide from their first day.

Kept safe by default

Every workspace gets its Lessons Learned record automatically, and it can't be deleted. Projects come and go; what you learned on them stays.

Write the Cause, Not the Symptom

The difference between a note you skim past and one that saves an afternoon.

Not much help

"The build failed. Re-ran it and it worked."

Actually useful

"The migration ran before the column existed, because deploy order wasn't pinned. Fix: gate the migration on the schema step completing."

Six months later, only one of those tells you what to do.

Stop Paying Twice for the Same Lesson

Start recording what you learn, and give every project — and every assistant — the benefit of it.

Free plan available • Included in every workspace • No credit card required

Better With the Rest of Your Context

Lessons are one layer of what your AI knows about your work

Carry Lessons Into Each Phase

Projects break big builds into phases. Lessons recorded in one phase are there for the next, so progress doesn't reset between sessions.

Learn about Projects

Give Your Agents Real Experience

Skills hold reusable knowledge; lessons hold what you found out the hard way. Together your agents work from what your team actually knows.

Learn about Skills & Agents