fix(grok): implement official hook contract

AGENTS.md

@@ -25,7 +25,7 @@ This repository owns the published `elydora` package, its CLI, synchronous and a
 - Write Cursor hooks only to `~/.cursor/hooks.json`; keep project and enterprise sources read-only. Preserve user hooks, migrate the prior versionless Elydora contract, and own exact native `preToolUse`, `postToolUse`, and `postToolUseFailure` commands. Forward native success and failure payloads, retain PowerShell exit code `2`, set every handler to `failClosed` with a bounded timeout, and commit the guard, audit script, runtime identity, private key, and hook configuration as one rollback-capable transaction.
 - Model stable, legacy, and early-access hook generations as explicit contracts. Keep their activation requirements visible in CLI output and README guidance.
 - Resolve stable Kimi hooks through `$KIMI_CODE_HOME/config.toml` with `~/.kimi-code/config.toml` as the default, and treat an empty override as the default. Activate `~/.kimi/config.toml` only when the legacy home exists. Register exact `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` rules with ten-second commands; stable Kimi supports its current sixteen-event schema and legacy kimi-cli supports its thirteen-event schema. Preserve TOML comments and array style, then parse the complete rendered document before staging it. Preserve the native snake_case payload, propagate exit code `2`, and keep audit delivery fail-open with owner-only error logs. Use encoded PowerShell commands on Windows and exact two-argument shell commands on Unix. Commit every detected config, generated runtime, runtime config, and private key through one rollback-capable transaction.
-- Keep Grok Build writes inside its native global `$GROK_HOME/hooks/*.json` contract. Treat Claude Code and Cursor compatibility files plus project `.grok/hooks` as read-only integration sources.
+- Resolve Grok Build user hooks through `$GROK_HOME/hooks/*.json` with `~/.grok/hooks/*.json` as the default, and treat an empty override as the default. Keep Claude Code, Cursor, project `.grok/hooks`, plugin, and `hooks-paths` sources read-only. Register exact `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` groups with ten-second command handlers, preserve the complete native camelCase payload, and emit Grok's documented deny JSON plus exit code `2` for frozen or revoked agents. Use encoded PowerShell commands on Windows and exact two-argument shell commands on Unix. Commit Grok's hook file, generated runtimes, runtime config, and private key through one rollback-capable transaction.
 - Write Auggie hooks only to `~/.augment/settings.json`; keep system and workspace settings read-only. Generate `.cmd` wrappers on Windows and `.sh` wrappers on Unix because Auggie dispatches supported script paths, and express hook timeouts in milliseconds.
 - Validate Auggie matcher syntax during installation with Node.js `new RegExp`; keep status and uninstall independent from the JavaScript validator so recovery remains available offline.
 - Write Cline hooks only to `$CLINE_DIR/hooks` with `~/.cline/hooks` as the default; keep Documents and workspace hook roots read-only. Preserve official input byte-for-byte, resolve Python runtimes from their absolute shebangs, and translate guard exit code `2` into Cline's JSON stdout cancellation control.