Karsa · playable demo

Paste a brief. See what the extractor can prove.

This page runs Karsa's actual requirement extractor (Python, demo-rules-1.2) inside your browser. Every value it finds comes with the exact words it was read from. If it can't point to the words, the value stays missing.

Read this before trusting the output.

It is a rule-based parser, not a language model. On 50 briefs it had never seen, it got every field right in 21 of 50 (42%, 95% CI 29–56%), below the 70% release gate. It caught only 1 of 6 new prompt-injection phrasings. The full evaluation is summarised in the Karsa case study.
In the product, every value here is only a draft until an analyst confirms it, and brief text can never approve anything.
Your text stays in this browser tab. The examples are synthetic; please don't paste confidential briefs.

Brief

Start from an example Brief text

Downloading the Python runtime (about 10 MB, once).

What the extractor found

Run the check to see highlighted evidence.

Highlighted text = the evidence for a value (numbered) or a flag (red).
Field	State	Value	Evidence (exact quote)
No result yet.

Flags

No result yet.

Actions it would plan (after human approval only)

No result yet.

Source: backend/app/domain/extraction.py at Karsa commit de686dd (SHA-256 bbdd8925…3337, the same file that was scored on held-out v2). Runtime: Pyodide 0.26.4 loaded from jsDelivr. Fields: leads, budget and timeline are normalised (budget in rupiah, timeline in weeks); the rest are quoted as written.