You code as usual.
A dev diary writes itself.

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your terminal · agent
your diary · today

Waiting for your first session…

No copy-paste, no end-of-day journaling. Start your diary →

Every agent session and every commit becomes a dated, illustrated entry — automatically.

No more dev logs, no standup notes, no end-of-day journaling.

You know what you built on any day.

One diary for everything you build.

You always know what you did on any day, month or year.

your agent · mydev.day

Tokens, model and time are measured from each session — never typed, never guessed.

$5/mo

Everything included

Unlimited projects, AI agents, GitHub sync. Billed yearly — or $6 monthly. Cancel anytime.

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And it looks great!

Flip through your diary, projects, reports and API/GitHub sync.

mydev.day/ Preview · example data
Public Projects ⚙

Today — Saturday, 13 June 2026

Log — 274 entries in 2026

JanFebMarAprMayJunJulAugSepOctNovDec
Less More

Saturday, 13 June 2026 — today

  • Helio Billing portal wired up
    Stripe Checkout + Billing Portal both live behind one subscription gate. Webhook verifies the signature and syncs the subscription on return so the member never waits for the event. Tested the full subscribe → manage → cancel loop.
    Claude Codeagent opusmodel 24 mintime 3commits 7files +312 / −45lines
    Screenshot from this entry
  • Helio Add Stripe webhook handler alice
  • Helio Fix portal redirect after checkout alice
  • Pathfinder A* routes around walls now
    Swapped the greedy walk for a proper A* with a Manhattan heuristic. Enemies path around obstacles instead of bumping into them.
    Codexagent gptmodel 84ktokens 18 mintime 2commits
    Screenshot from this entry
  • Pathfinder Tune A* heuristic weight bob
  • Helio Theme token variables alice
  • Helio Dark mode tokens
    Pulled every hard-coded colour into CSS custom properties and added a dark override. One toggle flips the whole app.
    Claude Codeagent 12 mintime 1commits +96 / −12lines
    Screenshot from this entry
  • Pathfinder Enemy spawn waves
    Data-driven wave table: each wave names the enemy types, counts and spawn interval. Designers can retune difficulty without touching code.
    Claude Codeagent opusmodel 31 mintime 4commits 6files +540 / −88lines
    Screenshot from this entry
  • Pathfinder Spawn table data bob
  • Pathfinder Refactor wave loop bob
  • Helio Onboarding copy pass
    Rewrote the three setup cards in plain language and cut the first-run modal. Time-to-first-project should drop noticeably.
    Claude Codeagent 9 mintime
    Screenshot from this entry
  • Pathfinder Project kickoff notes
    Scoped the prototype: top-down grid, one enemy type, a single hand-built level. Goal for the week is a thing that moves and chases.
    Screenshot from this entry

Your dashboard, after a few sessions. Start your diary →

FAQ

Does every prompt become a new entry?

No. Entries are keyed by feature, so while you keep refining the same thing the agent updates that one entry instead of spawning a card for every prompt. Move on to a different feature and you get a fresh entry. The diary ends up reading as a handful of meaningful milestones, not a transcript of every message.

Do I need to use AI agents?

Not strictly — connect GitHub and your commits log themselves. But agents are where mydev.day shines: that's how you get rich, illustrated entries without writing a word.

Which agents and tools work with it?

Any of them — Claude, OpenAI, Gemini, or your own scripts. CLI agents post with one request; GUI tools use MCP.

Where do the metrics and screenshots come from?

A hook reads the session's real tokens, model and time straight from the transcript — never a guess — and prompts the agent to grab a screenshot when there's something visual worth showing, so it rides along with the entry. You type none of it.

How long does setup take?

A couple of minutes: create a project and token, paste one prompt. GitHub: connect an account, pick repos.

Why shouldn't I just vibe-code my own version of this?

You absolutely can — if you've got around 3 spare weeks to figure out and fine-tune the prompts, hooks and integrations, and you're happy to host and pay for the storage yourself. And that's just for the minimum features — mydev.day keeps improving, so you'd be chasing a moving target. mydev.day is all of that, built and maintained, for $6/month.

Is there a free trial?

Yes — 14 days. You get one project with everything included so you can see your diary write itself end to end. Add a card whenever you want to keep going or run more than one project.

Is my diary public?

Private by default — it's your own diary. A project goes public only if you choose; publishing is optional.

I have several GitHub accounts — can I combine them?

Yes — connect as many as you like; all their commits land in one diary.

What happens if I cancel?

Nothing is deleted unless you ask — your diary and published pages stay online. Posting pauses until you resubscribe.

Let your diary write today’s entry.

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