What else we can do

Optional directions for the DSA + System Design mind-map repo. Pick what matches your goal (interview speed, teaching, team use, or long-term maintenance). Nothing here is required for the current notes-first setup to stay valid.

Automation and CI

Idea	Why
GitHub Actions	Run `scripts/validate-problems.sh` (and optionally `refresh-knowledgebase.sh`) on every PR so broken section shapes never merge.
Link checker in CI	Fail if internal `.md` links break after refactors (small Python or `lychee`-style tool).
Pre-commit hook	Run validation locally before commit; optional auto-run `refresh-knowledgebase.sh` when only `topics/` changed.
Scheduled snapshot	Nightly workflow that opens a PR only when counts drift (optional; noisy if content churn is low).

Learning and recall (beyond static markdown)

Idea	Why
Spaced-repetition deck export	Script to emit CSV/Anki from `## Mind-Map Tags` + title → drill recognition cues only.
“Redo deck” file	Maintain `study/redo-queue.md` listing LC numbers you missed cold; regenerate from git blame or manual checkboxes.
Difficulty progression paths	Markdown maps per topic: Easy → Medium → Hard chains with explicit “unlock” links (already partly in patterns).
One-page cheat PDF	Pandoc build from `cheatsheets/` + pattern index for print/offline.

Content expansion

Idea	Why
Align PROBLEM_INDEX with disk	Automated diff: index rows vs `topics/**` filenames; script reports missing or orphaned files.
Company-tag consistency	Normalize “Companies” lines across problems for targeted grind lists (Google-heavy DP, etc.).
More SD case studies	Multi-region, cron at scale, CDC pipelines — same HLD template as existing `system-design/hld/`.
Behavioral story bank	Expand `interview-prep/` with outline-only STAR templates per LP (no fabricated stories).

Runnable code (departs from pure notes — optional)

Idea	Why
`solutions/go` + `solutions/js`	Package per LC number with `go test` / `npm test` — catches snippet drift; heavier maintenance.
leetcode-runner shim	Thin CLI that copies snippet into LC-shaped stubs for quick paste-test (personal tooling).

Idea	Why
MkDocs / VitePress / Docusaurus	Sidebar by topic, full-text search, deploy to GitHub Pages for browser study.
Unified tag index	Generate `TAG_INDEX.md` from `## Mind-Map Tags` lines (`rg`-friendly backup already exists).
`CHANGELOG.md` for content	Human-readable log when bulk problems land (teaching cohorts).

Team and teaching

Idea	Why
CONTRIBUTING.md	PR checklist: template, diagram rule, run `refresh-knowledgebase.sh`, link check.
Weekly cohort agenda	Markdown templates under `study/cohorts/` (Week N objectives + problem IDs).
Fork-friendly branding	Neutralize paths if others fork (optional LICENSE file + short attribution line).

Quality and accessibility

Idea	Why
Mermaid lint	Catch invalid diagrams before merge (some CI integrations support this).
Alt text / captions	Short line under each diagram for screen readers if you publish HTML.
Consistency pass on “At a Glance”	Normalize Frequency and Companies format across older files.

Quick wins (low effort, high clarity)

Add GitHub Actions only for validate-problems.sh.
Add CONTRIBUTING.md pointing at problem-template.md, diagram rule, and refresh-knowledgebase.sh.
Add a scripts/diff-index-vs-disk.py that compares PROBLEM_INDEX.md table to actual files (report-only).

Suggested order if you only do three things next

CI validation — protects 12-section + diagram discipline.
CONTRIBUTING.md — saves you explaining rules every time.
Index vs disk diff script — keeps PROBLEM_INDEX.md honest as you grow.

See also: AGENTS.md in the repository root (continuing work table), Archived implementation plan (original scope and Phase 2 notes).