update readme

README.md

@@ -1,25 +1,42 @@
 # Phonograph
 
-Phonograph is a friendly, collaborative data platform for nerds of all stripes,
-built around PostgreSQL.
+Phonograph is a friendly, collaborative data platform for nerds of all stripes.
+It's for teams who wish they used Postgres, but actually use:
 
-Contemporary browser-centric platforms like Airtable open new frontiers for data
-engineering, but they suffer from limitations that conventional databases have
-long since addressed: relational data models are an afterthought; row-level
-security is missing; third party integrations must be implemented piecemeal for
-lack of a standardized API. Phonograph addresses these shortfalls by
-implementing an accessible front-end interface backed by an existing, mature
-database management system.
+- Airtable
+- Google Sheets
+- Excel
+- `inventory_export-2026-02-15_v3-FINAL.csv`
 
-![Screenshot of multi-cursor editing, as well as a dropdown menu with a highlighted option labeled "PostgreSQL credentials"](./docs/screenshot_multi_cursor.png)
+Phonograph is built on top of Postgres, exposing a curated subset of features
+and adds a familiar user interface for developers and end users alike.
 
-# Browser Compatibility Note
+# Demo
 
-[CSS anchor positioning](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Anchor_positioning)
-is a relatively new API, and Phonograph uses it extensively. Browser support is
-now fairly good, but
-[Firefox users in particular](https://bugzilla.mozilla.org/show_bug.cgi?id=1988225)
-should upgrade to version 147 or newer for best experience.
+Try the hosted demo at [phono.dev](https://phono.dev)!
+
+# Features and Design
+
+- Leverages Postgres RBAC for robust authorization, including RLS (planned),
+  while adding support for invite-by-email and a familiar permissions model for
+  collaboration.
+- Integrates with effectively any third party software with a Postgres driver.
+- Powerful user interface inspired by your favorite text editor features, like
+  multi-cursor editing.
+- Write filters and generated column specs (planned) as PostgreSQL—made
+  possible by a custom SQL parser with support for advanced syntax like
+  `column = ANY(array)`.
+
+![Screenshot of a spreadsheet-like user interface. A sidebar lists "Tables" and "Portals", and a table on the right displays URL, numeric, and single-select data.](./docs/screenshot_collab.png)
+
+![Screenshot of a terminal overlayed above another page listing credentials and associated permissions. The terminal runs `psql` and displays a query running on the data from the previous screenshot.](./docs/screenshot_psql.png)
+
+# An Experiment from Second System Technologies
+
+Phonograph is a proof-of-concept built by Second System Technologies, to solve
+real world problems, and its bones are built to scale. It's a work in progress,
+which means that some expected features are missing and we have yet to sand out
+many rough edges.
 
 # Development Quickstart
 
@@ -39,39 +56,3 @@ external OAuth2 provider is required to manage authentication.
 # The Phonograph Authorization Model
 
 Refer to documentation in [docs/auth.md](./docs/auth.md).
-
-# Copyright and License
-
-All original source code in this repository is copyright (C) 2025 Second System
-Technologies LLC and distributed under the terms in
-[the "LICENSE" file](./LICENSE). Certain third-party assets within
-[the "static" directory](./static) may be governed by different licenses, for
-example the Open Font License or MIT License, as stated by their original
-authors. Copies of each relevant license have been included alongside these
-files as needed.
-
-# LLM Code Policy
-
-Large language model code generation is permitted sparingly in very limited
-cases, for example for completing clearly defined transformations which span
-multiple files and are not supported by conventional code actions. All code
-generated by LLMs is considered reflective of its author, and authors are
-expected to thoroughly and frequently review before committing affected work.
-
-As of this writing, models display a strong bias towards patterns which are well
-represented in public open source projects. This can cause them to tend towards
-suboptimal one-size-fits-most or simply outdated coding practices in certain
-circumstances. LLM assistance should be sufficiently constrained to avoid
-allowing outputs to dictate or implicitly guide significant design decisions.
-
-Furthermore, current language models broadly behave adversarily, in the sense
-that they are optimized to make perceiving model outputs versus non-model
-outputs as difficult as possible. This can make generated code uniquely
-challenging to review effectively. In this context, non-trivial business logic,
-particularly logic with security implications, may not be implemented with
-direct assistance from LLM tools.
-
-Examples of LLM-assisted changes in practice:
-
-- Replacing SVG icons with similar webfont icons from a different icon pack.
-  (Revision `ztrnxzqv` (Git `a8dd49f7`))