90 Days Challenge

One problem. One lesson. Every day.

Live tracker · Demo view

A quiet, game-like accountability loop for a 90-day interview-prep push (Oct 1 to Dec 29, 2026). Claude keeps the score, nudges me on Slack at sensible times, and a calm pixel page shows how it is going. The bar above rebuilds itself whenever progress changes: each little block on the top row is a day, the lower row is the 100-problem goal.

The daily loop

Quest	Counts when
Solve	at least one problem lands in lets-dsa
Learn	a research or study session is logged with /learn
Read	I react 👀 on the morning digest message

Solve + Learn keeps the streak. Adding the read makes it a better day. Two solves and a read makes it the best kind. The goal: 100 problems by Dec 31, about 1.1 a day.

How it works

lets-dsa · career-os · everything-tech ──┐
/learn entries · Slack replies ──────────┤──► ledger ──► score ──► Slack nudges
                                         │                    └──► docs/ (the page + the bar above)

• Ledger: an append-only log in data/ledger/. Everything else is derived from it.
• Brain: scripts/tick.py decides what to say, when, and when to stay silent. The scheduled Claude routines only relay its text, so even a small model runs it reliably.
• Nudges: a few check-ins a day shaped around my schedule, quiet when nothing is left to do. A picture of the page is added on milestones and in the Sunday review.
• Saves itself: routines push a branch, and a GitHub Action opens the PR and merges it.

Talking to it (Slack replies)

late · off · freeze · read · linkedin: note · naukri: note · resume: note · jobs: note · exp: note · learn: topic | tag | takeaway

Poke around

sh scripts/run.sh                      # refresh everything
python3 scripts/log_event.py learn --topic "..." --tag dsa --takeaway "..."
python3 -m http.server --directory docs    # preview the page (add ?demo for sample data)

Make it yours

Everything tunable is config: config/ for pillars, day types, badges and holidays, docs/config.json for the page's colours. Drop a plain-English rule in inbox.md and the weekly review picks it up. See CLAUDE.md for the ground rules.