fix(gemini): implement native transactional hooks

README.md

@@ -85,6 +85,8 @@ Codex installation writes exact `PreToolUse` and `PostToolUse` command groups to
 
 Cursor installation writes native global `preToolUse`, `postToolUse`, and `postToolUseFailure` handlers to `~/.cursor/hooks.json`. Elydora preserves unrelated user hooks, leaves project and enterprise sources unchanged, emits valid JSON hook responses, fails closed when enforcement or audit execution cannot complete, and commits its 10-second hook contract with all managed runtime files as one rollback-capable transaction.
 
+Gemini CLI installation writes exact matchless `BeforeTool` and `AfterTool` command handlers to `$GEMINI_CLI_HOME/.gemini/settings.json` (`~/.gemini/settings.json` by default). Elydora preserves JSONC comments, line endings, unrelated user hooks, and additive workspace, system, system-override, and extension sources. The user settings document and all four generated runtime artifacts commit in one rollback-capable transaction. Generated hooks retain Gemini's native snake_case payload, emit `{}` on successful or fail-open execution, surface runtime failures through stderr and `error.log`, and use exit code `2` for frozen or revoked agents. Installation honors `hooksConfig` controls and uses encoded PowerShell commands on Windows. Run `/hooks list` after installation to inspect the effective hook inventory.
+
 GitHub Copilot CLI installation writes native user hooks to `$COPILOT_HOME/hooks/elydora-audit.json` with `~/.copilot/hooks/elydora-audit.json` as the default. Elydora preserves user hooks, migrates exact Elydora-owned entries from project `.github/hooks/hooks.json`, quotes the resolved Node.js runtime for each shell, and propagates the freeze guard's exit code. Installation requires `disableAllHooks` to be false.
 
 Cline installation writes `PreToolUse.mjs` and `PostToolUse.mjs` to `$CLINE_DIR/hooks` (default `~/.cline/hooks`). Elydora leaves the Documents and workspace hook roots unchanged. The wrappers preserve Cline's official payload and translate a frozen guard into JSON stdout cancellation control.