switch to npm-based install

Author: ljw1004

AGENTS.md

@@ -1,6 +1,6 @@
 # opencode-trace
 
 This is a plugin designed to capture the raw json requests sent to the LLM, and the raw responses back (after streaming-delta consolidation). It saves them into ~/opencode-trace
-- For end-to-end build+install and testing: `npm run build` then `cp dist/opencode-trace.ts ~/.config/opencode/plugins/`, and then just run `opencode run --dangerously-skip-permissions "why is grass green?"` to test it. This will re-use the existing opencode API key / oauth credentials.
-- For development, no build+install is needed. Undo the previous global install `rm ~/.config/opencode/plugins/opencode-trace.ts` and then `OPENCODE_CONFIG="/absolute/path/to/opencode-trace/integration-test.json" opencode run --dangerously-skip-permissions "why is the sky blue?"`
-- For development: `npm install` once, then `npm run typecheck` or `npm run lint`
+- End users should install it as an npm plugin via `"plugin": ["@ljw1004/opencode-trace"]` in `~/.config/opencode/opencode.json`.
+- For development: `npm install` once, and change the plugin line to `["/path/to/opencode-trace/index.ts"]`. Then each time you edit, `npm run typecheck` and `npm run lint` and then exercise it `opencode run --dangerously-skip-permissions "why is the sky blue?"`. (It's using the existing opencode configuration to pick up your already-configured auth).
+- For iterating on the viewer, you can copy `viewer.js` into your ~/opencode-trace directory, or copy examples into this directory, and they'll preferentially pick up `viewer.js` over their embedded viewer code.

README.md

@@ -5,8 +5,13 @@ This opencode plugin lets you see the raw json requests made to the LLM, and the
 
 ## Installation
 
-1. Download https://raw.githubusercontent.com/ljw1004/opencode-trace/refs/heads/main/dist/opencode-trace.ts into ~/.config/opencode/plugins
-2. Restart opencode and use it
-3. You'll see each transcript stored in ~/opencode-trace
+Add the package to your OpenCode config:
 
-To uninstall, `rm ~/.config/opencode/plugins/opencode-trace.ts`
+```json
+{
+  "$schema": "https://opencode.ai/config.json",
+  "plugin": ["@ljw1004/opencode-trace"]
+}
+```
+
+Restart OpenCode and you'll see each transcript stored in `~/opencode-trace`.