redact: replace psarc/Rocksmith/official DLC references with neutral terms

.github/ISSUE_TEMPLATE/bug.yml

@@ -51,7 +51,7 @@ body:
     id: repro
     attributes:
       label: Reproduction steps
-      description: "Numbered steps. Include song format (PSARC / sloppak / loose) and arrangement type if relevant."
+      description: "Numbered steps. Include song format (legacy archive / sloppak / loose) and arrangement type if relevant."
       placeholder: |
         1. ...
         2. ...

.specify/templates/plan-template.md

@@ -41,11 +41,11 @@ Answer each gate with PASS / FAIL / N/A and a short justification:
   serve-path build step? If plugin CSS is needed, does it ship through
   `styles`?
 - **Plugin and capability boundary**: If the feature is outside browse +
-  play CDLC, is it plugin-shaped? Does every Slopsmith-facing plugin
+  play custom DLC, is it plugin-shaped? Does every Slopsmith-facing plugin
   behavior declare `capability-pipelines.v1` metadata (`capabilities`,
   `ui`, or `ui_contributions`) and use `load_sibling` for backend
   siblings?
-- **CDLC compatibility**: Are PSARC scanning, sloppak manifests,
+- **Song format compatibility**: Are legacy archive scanning, sloppak manifests,
   arrangement IDs, and highway WebSocket messages kept backward-
   compatible, or is a migration note planned?
 - **Pure/testable core**: Are new `lib/` helpers flat-importable,

AGENTS.md

@@ -2,7 +2,7 @@
 
 Project orientation for AI coding assistants (Cursor, GitHub Copilot, OpenAI Codex, Aider, Claude Code, Cline, Continue, Cody, Devin, …) and human contributors.
 
-Slopsmith is a self-hosted web app for browsing, playing, and practicing Rocksmith 2014 Custom DLC. It runs as a Docker container with a FastAPI backend (`server.py`), vanilla JavaScript frontend (`static/`), shared Python libraries (`lib/`), and an extensive plugin system (`plugins/`). No frontend frameworks — plain JS, HTML, Tailwind CSS. AGPL-3.0-only.
+Slopsmith is a self-hosted web app for browsing, playing, and practicing interactive music notation, built around its own open `.sloppak` chart format. Charts come from importing Guitar Pro (GP5/GP8) or MusicXML, or from authoring in the built-in editor. It runs as a Docker container with a FastAPI backend (`server.py`), vanilla JavaScript frontend (`static/`), shared Python libraries (`lib/`), and an extensive plugin system (`plugins/`). No frontend frameworks — plain JS, HTML, Tailwind CSS. AGPL-3.0-only.
 
 This file is the canonical orientation. Tool-specific automation (Claude skills/subagents/rules, Copilot instructions, etc.) lives in [`.claude/`](.claude/) and [`.github/copilot-instructions.md`](.github/copilot-instructions.md); both point back here. For plugin work, start at [`docs/PLUGIN_AUTHORING.md`](docs/PLUGIN_AUTHORING.md).
 
@@ -19,13 +19,13 @@ static/
   index.html           Single-page app shell
 lib/
   song.py              Core data models (Note, Chord, Arrangement, Song)
-  psarc.py             PSARC archive reading and extraction
   sloppak.py           Sloppak format support
-  sloppak_convert.py   PSARC → sloppak conversion + Demucs stem split
+  sloppak_convert.py   Import conversion + Demucs stem split
+  loosefolder.py       Loose-folder XML chart support
   audio.py             WEM/OGG/MP3 audio handling
   retune.py            Pitch-shifting logic
   tunings.py           Tuning name/offset utilities
-  gp2rs.py             Guitar Pro to Rocksmith XML conversion
+  gp2rs.py             Guitar Pro to arrangement XML conversion
   gp2midi.py           Guitar Pro to MIDI
 plugins/
   __init__.py          Plugin discovery, loading, requirements install, load_sibling
@@ -95,7 +95,7 @@ Pytest config in `pyproject.toml` sets `pythonpath = [".", "lib"]` and `testpath
 
 Slopsmith supports two:
 
-- **PSARC** (Rocksmith native) — encrypted archive. Read-only. Fast metadata scan via `lib/psarc.py` (`read_psarc_entries`); full unpack via `unpack_psarc()` for playback. Audio via `vgmstream-cli` + `ffmpeg`.
+- **Legacy archive** (encrypted, read-only) — fast metadata scan via `lib/sloppak.py`; full unpack for playback. Audio via `vgmstream-cli` + `ffmpeg`.
 - **Sloppak** (open format) — hand-editable, two interchangeable forms: `.sloppak` zip or `.sloppak/` directory. Preferred for new features. Full spec: [`docs/sloppak-spec.md`](docs/sloppak-spec.md). Key code: `lib/sloppak.py`, `lib/sloppak_convert.py`, `lib/song.py`.
 
 ## Frontend conventions

docs/plugin-sibling-imports.md

@@ -13,7 +13,7 @@ The plugin loader inserts each plugin's directory onto `sys.path` so `from extra
 ```python
 def setup(app, context):
     extractor = context["load_sibling"]("extractor")
-    PsarcReader = extractor.PsarcReader
+    ArchiveReader = extractor.ArchiveReader
     # …
 ```
 

docs/websocket-protocol.md

@@ -18,7 +18,7 @@ Each connection receives the following JSON frames, roughly in this order:
 | `tone_changes` | `{ type: 'tone_changes', base, data: [{ time, name }] }` | Optional — tone change events relative to the arrangement base tone; only sent if tones were found. |
 | `notes` | `{ type, data: [{ t, s, f, sus, ho, po, sl, bn, ... }] }` | Single notes. |
 | `chords` | `{ type, data: [{ t, notes: [{ s, f, sus, ... }] }] }` | Chord events. |
-| `phrases` | `{ type, data: [{ start_time, end_time, max_difficulty, levels: [...] }], total }` | Optional — per-phrase difficulty ladder for master-difficulty slider (slopsmith#48). Only sent when the source chart carries multi-level phrase data (PSARC / phrase-aware sloppak). Sent in chunks (`data` is a batch, `total` is the full count across messages) to avoid multi-MB single frames. Absent for GP imports and legacy sloppak; consumers must treat missing message as "single fixed difficulty — slider disabled". |
+| `phrases` | `{ type, data: [{ start_time, end_time, max_difficulty, levels: [...] }], total }` | Optional — per-phrase difficulty ladder for master-difficulty slider (slopsmith#48). Only sent when the source chart carries multi-level phrase data (legacy archive / phrase-aware sloppak). Sent in chunks (`data` is a batch, `total` is the full count across messages) to avoid multi-MB single frames. Absent for GP imports and legacy sloppak; consumers must treat missing message as "single fixed difficulty — slider disabled". |
 | `ready` | `{ type: 'ready' }` | All data sent — safe to finalize and start rendering. |
 
 ## Delivery guarantees