Trinka
Grammar, technical editing, publication checks, and plagiarism tools
Do not mistake the interface for the product. Trinka's durable value is model, data, workflow, which a solo one-shot build cannot reproduce responsibly. The prompt therefore builds only the closest honest personal consolation tool.
Build verification: not recorded. How we judge buildability
What you give up
- brand-trained workflows
- team governance and integrations
- vendor-managed prompt and quality tuning
- proprietary models or classifiers
Why people still pay
Trinka: Customers pay for tuned workflows, predictable quality, governance, and a product team absorbing model churn rather than for the text box alone.
Your build guide
The stack, security requirements, and agent rules for a focused replacement.
Before you start
- OpenAI API key in .env
- Node.js 22
- SQLite database
- Explicit README warning that this is a consolation build, not a production replacement
Use these project rules and optional skill references alongside the prompt. Review each skill before adding it to your agent; the AGENTS.md export includes the same guidance.
Project rule, data: Model source documents, editable pages or notes, internal links, revisions, and exports; retain source IDs and timestamps.
Project rule, behavior: For academic grammar, import a user-supplied document and preserve its original text and hash.
Project rule, recovery: A classifier score cannot be presented as proof of authorship; a failed detector run remains unknown and never overwrites source text.
Implementation plan
Phase 1, architecture and data
Use exactly this stack: Next.js 15 + TypeScript + SQLite. Model source documents, editable pages or notes, internal links, revisions, and exports; retain source IDs and timestamps.
Phase 2, implement
For academic grammar, import a user-supplied document and preserve its original text and hash.
Phase 3, implement
Run a clearly labelled heuristic or user-selected detector and record its model/version, score, and evidence spans.
Phase 4, review and output
Let the user review uncertain passages and export a report with limitations and source excerpts.
Phase 5, recovery and acceptance
Verify this invariant with a saved fixture: A classifier score cannot be presented as proof of authorship; a failed detector run remains unknown and never overwrites source text. State the practical limit: brand-trained workflows.
Build me a focused academic grammar workflow for the personal core of Trinka. Requirements: - Use exactly this stack: Next.js 15 + TypeScript + SQLite. Model source documents, editable pages or notes, internal links, revisions, and exports; retain source IDs and timestamps. - Paid product context: Grammar, technical editing, publication checks, and plagiarism tools. Build only this DIY scope: Analyze user-supplied text with a labelled heuristic or user-selected detector, show evidence and uncertainty, and export a reviewable report. - For academic grammar, import a user-supplied document and preserve its original text and hash. - Run a clearly labelled heuristic or user-selected detector and record its model/version, score, and evidence spans. - Let the user review uncertain passages and export a report with limitations and source excerpts. - Use a local web page with input, progress, review, and export views. Required input or access: OpenAI API key in .env. Keep credentials in .env. - Acceptance: with one labelled sample, show the input, saved intermediate state, and exported result; verify this invariant: A classifier score cannot be presented as proof of authorship; a failed detector run remains unknown and never overwrites source text. - Out of scope: brand-trained workflows; team governance and integrations. Keep this a personal, inspectable workflow. - Include a README with setup, a sample input, required keys or permissions, data location, and the supported scope.
$ open in your agent (prompt prefilled, you press enter), copy the prompt or copy AGENTS.md · generated from this app's build plan
prompt copied. want to know what dies next week?
new verdicts + top votes, weekly. free. one-click out.
Trinka pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| basic | $0 | $0 | 5,000 words/month; 4 proofread files/month; 5 AI-writing requests/month; 4 free credits/month; 1 plagiarism score/month. |
| premium | $20 | $6.67 | 120 proofread files/year (10/month); 25 AI-writing requests/month; 10 credits/month; 2 plagiarism scores/month.Official current comparison states approximately $20/month or $80/year. |
| premium plus | — | — | 240 proofread files/year (20/month); 1,000 AI-writing requests/month; 20 credits/month; 240 plagiarism/AI-detection pages/year; 600 citations/year.Current dynamic price was not exposed publicly. |
| confidential data | — | $25 | 600 proofread files/year (50/month); 3,000 AI requests/month; 50 credits/month; 1,000 pages/year; 1 advanced report/month; 600 citations/year; real-time deletion.Annual-only: $300/year. |
| confidential data teams | — | — | Minimum 5 users; confidential-data controls and team limits.Custom price. |
| writing assistance for teams | — | — | Custom team seats and writing limits.Custom price. |
| institutions | — | — | Custom institutional seats, integrations, and limits.Custom price. |
free tier5,000 words/month; 4 files/month; 5 AI-writing requests/month; 4 free credits/month; 1 plagiarism score/month
billingmonthly + annual; Confidential Data individual is annual-only; team/institution tiers are custom
hidden costsExtra credit packs are sold. Free monthly credits expire at cycle end; purchased credits do not expire.
pricing sources checked 2026-08-12 · pricing source ↗
Questions about Trinka
Can you build your own Trinka with AI?
A full replacement is not the recommended project. Do not mistake the interface for the product. Trinka's durable value is model, data, workflow, which a solo one-shot build cannot reproduce responsibly. The prompt therefore builds only the closest honest personal consolation tool.
What does the Trinka build prompt cover?
The prompt starts with this scope: Build a private academic grammar workspace that sends user text to one chosen model, stores versions, applies reusable instructions, and exports Markdown. Full-product capabilities excluded from the comparison include: brand-trained workflows; team governance and integrations; vendor-managed prompt and quality tuning. Follow the implementation plan and its prerequisites before expanding the build.
How do I use the prompt, AGENTS.md and agent skills?
Start with the Trinka prerequisites and stack, then copy the prompt into your coding agent. Save the project rules as AGENTS.md in the project root. Linked skills are optional packages or source instructions for specific tasks; review their current contents and install only those matching the chosen stack. A skill does not supply API credentials or verify the finished app.
How long will this Trinka project take?
The catalogue estimate is not a true replacement; consolation build in one to two days for the limited scope. Setup, integration approvals, debugging, deployment and ongoing maintenance can add time. This is an estimate, not a delivery guarantee.
What would I give up by replacing Trinka?
brand-trained workflows; team governance and integrations; vendor-managed prompt and quality tuning; proprietary models or classifiers. Trinka: Customers pay for tuned workflows, predictable quality, governance, and a product team absorbing model churn rather than for the text box alone.
What can I use instead of building Trinka?
The prior-art section lists Ollama, Open WebUI as starting points. Review their current scope, license and maintenance before adopting one.