docs: fix hook names and prompt tags in documentation

- Fix outdated hook names: prompt:before → experimental.chat.system.transform
- Fix outdated hook names: tool.execute.before → (removed, file tracking is in tool.execute.after)
- Fix outdated hook names: compaction:before → experimental.session.compacting
- Add missing event hook documentation
- Fix README example to show correct <hot_session_state> tag instead of <workspace_memory_candidates>

AGENTS.md

@@ -261,24 +261,26 @@ export default {
 
 ## Plugin Hooks
 
-### `prompt:before`
+### `experimental.chat.system.transform`
 
 Injects workspace memory and hot session state into system prompt.
 
-### `tool.execute.before`
-
-Tracks active files (read, grep, edit, write actions).
-
 ### `tool.execute.after`
 
+- Tracks active files (read, grep, edit, write actions)
 - Tracks open errors from failed commands
 - Clears errors when commands succeed
 - Ignores `exitCode === undefined`
 
-### `compaction:before`
+### `experimental.session.compacting`
 
 Extracts workspace memory candidates from conversation, applies quality gate and deduplication.
 
+### `event`
+
+- `session.compacted`: Promote session decisions to workspace memory
+- `session.deleted`: Clean up session state files
+
 ## Debugging & Testing
 
 ### Manual Testing Steps

README.md

@@ -93,21 +93,19 @@ Automatically tracks current session context:
 Injected into system prompt:
 ```
 <workspace_memory>
-- [decision] Use npm cache for plugin loading...
+- [decision] Use npm cache for plugin loading, not npm link
+- [project] This repo uses opencode-agenthub plugin system
+- [reference] Storage: ~/.local/share/opencode-working-memory/workspaces/{hash}/
 </workspace_memory>
 
----
-<workspace_memory_candidates>
-- [project] This repo uses opencode-agenthub plugin system
-- [decision] Memory V2 uses three-layer architecture
-</workspace_memory_candidates>
-
-Active Files:
+<hot_session_state>
+active_files:
 - src/plugin.ts (edit, 18x)
 - tests/plugin.test.ts (edit, 5x)
 - src/extractors.ts (grep, 3x)
-
-Open Errors: (none)
+open_errors:
+- [typecheck] TS2345: Argument of type 'string' is not assignable...
+</hot_session_state>
 ```
 
 ## Quality Guarantees

docs/architecture.md

@@ -207,25 +207,27 @@ Delegate task tracking to OpenCode's native features.
 
 The plugin hooks into OpenCode lifecycle events:
 
-### `prompt:before`
+### `experimental.chat.system.transform`
 
 Injects workspace memory and hot session state into system prompt.
 
-### `tool.execute.before`
-
-Tracks active files (read, grep, edit, write actions).
-
 ### `tool.execute.after`
 
+- Tracks active files (read, grep, edit, write actions)
 - Tracks open errors from failed commands
 - Clears errors when commands succeed
 - Ignores `exitCode === undefined` (successful commands without explicit exit codes)
 
-### `compaction:before`
+### `experimental.session.compacting`
 
 Extracts workspace memory candidates from conversation.
 Applies quality gate, deduplication, and source priority.
 
+### `event` (session.compacted, session.deleted)
+
+- `session.compacted`: Promote session decisions to workspace memory
+- `session.deleted`: Clean up session state files
+
 ## Quality Guarantees
 
 ### No False Positive Errors