M0: compilable skeleton — Kigi 0.1.0 fork surgery

Hard fork of xai-org/grok-build (Apache-2.0) re-targeted as Kigi, an
unofficial Kimi Code CLI community build.

Rename & identity
- 72 xai-*/xai-grok-* crates -> kigi-* (explicit: xai-grok-pager-bin ->
  kigi-bin [binary `kigi`], xai-grok-pager -> kigi-tui; rest mechanical);
  ptyctl, ptyctl-cli, third_party/ unchanged; proto package
  xai.grok.tools.v1 -> kigi.tools.v1
- Config home ~/.kigi (KIGI_SHARE_DIR override), env prefix GROK_* ->
  KIGI_*, `kigi --version` carries the unofficial-community-build notice
- clap identity, help text, startup banner, prompt templates rebranded
  (templates re-encrypted)

Deletions (PRD removal list #5/#6/#7/#9/#10)
- voice input (xai-grok-voice) and all TUI wiring
- telemetry: Mixpanel client, external OTel stream, Sentry, OTLP layers,
  trace/GCS/S3 upload queues (kigi-file-utils halved), workspace upload
  module & dc_log, heap-profile uploader, auth-diagnostics uploader,
  session-analytics halves of feedback; local zero-egress observability
  preserved in new kigi-log crate (unified log, --debug firehose,
  subsystem file logs, opt-in instrumentation)
- announcements (crate, remote-settings fields, TUI surfaces)
- plugin marketplace (crate, sources/browse/CTA/extensions-modal tab);
  direct plugin install/uninstall/update via kigi-agent git_install kept
- relay/gateway/assets endpoints and features (agent relay, headless
  relay transport, gateway bridge, LeaderEnvUrls); leader IPC socket now
  ~/.kigi/leader.sock + KIGI_LEADER_SOCKET, no ws-url derivation
- functional types rehomed instead of deleted: PermissionMode ->
  kigi-config-types, McpInitStrategy -> kigi-mcp, PrCreationSource ->
  session signals, TerminalDiagnostics -> kigi-pager-render, agent_id ->
  shell util

Endpoints
- kigi-env rewritten: single production KigiEndpoints {coding_api_base_url
  https://api.kimi.com/coding/v1 (KIGI_CODE_BASE_URL), oauth_host
  https://auth.kimi.com (KIGI_OAUTH_HOST), update_base_url (GitHub
  Releases API), upgrade_page_url}; GrokBuildEnvironment enum deleted

Toolchain & workspace hygiene
- Rust 1.97.0 pinned; edition 2024; full cargo update; git2 hoisted to
  workspace at 0.21 (Option->Result API migration), quick-xml 0.41
- Root Cargo.toml hand-maintained (PRD §8.1): version 0.1.0 inherited by
  all members, members sorted, unused deps pruned
- cargo-deny advisories gate (deny.toml with documented transitive
  exceptions); CI workflow (check/clippy/fmt/deny/test, macOS+Linux)
- cross-crate test seams re-gated behind `test-support` cargo feature;
  insta snapshot baselines renamed to the kigi_tui prefix
- clippy --workspace --all-targets: zero warnings; fmt clean

Fixes surfaced by the port
- updater probe/installer divergence (bin/kigi vs bin/grok symlink set)
- idle model-metadata refresh dead under KIGI_CODE_BASE_URL override
  (new is_effective_coding_endpoint_url, loopback+override aware)
- macOS symlinked-TMPDIR fixture canonicalization (foreign_sessions,
  fast-worktree); RSS measurement tests serialized via serial_test

Docs & legal (Apache §4)
- NOTICE added (upstream attribution + change statement); THIRD-PARTY
  notices sustained; kigi-tools ported-code notices extended; README,
  CONTRIBUTING, SECURITY, AGENTS.md rewritten

Out of scope for M0 (tracked): Kimi auth/inference (M1), search/fetch,
command parity, config import (M2), Computer Hub excision & final
brand-token sweep (M2), distribution & self-update rewrite (M3).

crates/codegen/kigi-tui/docs/hooks-and-plugins.md

@@ -0,0 +1,106 @@
+# Hooks & Plugins Guide
+
+Grok Build supports **hooks** (event-driven shell commands) and **plugins** (bundles of skills, agents, hooks, and MCP servers). Both are managed through a unified modal interface.
+
+## Opening the Modal
+
+| Method | Opens on tab |
+|--------|-------------|
+| `Ctrl+L` | Plugins (any pane; **non–VS Code family** — on VS Code / Cursor / Windsurf / Zed use `/plugins`) |
+| `/plugins` | Plugins (any terminal) |
+| `/hooks` | Hooks |
+
+## Tabs
+
+The modal has four tabs: **Hooks**, **Plugins**, **Skills**, and **MCP Servers**. Switch between them with `Tab` / `→` (forward) or `Shift+Tab` / `←` (backward).
+
+---
+
+## Hooks Tab
+
+Hooks are shell commands (or HTTP calls) that run automatically on events like `session_start`, `post_tool_use`, `notification`, etc. See [Creating Custom Hooks](custom-hooks.md) for how to write your own.
+
+Hooks are grouped by source:
+- **Global hooks** — from `~/.kigi/hooks/`
+- **Project hooks** — from `.kigi/hooks/` in your repo
+- **Plugin hooks** — bundled with installed plugins
+- **Custom hooks** — added manually via a path
+
+Each hook shows:
+- **Event** it triggers on (e.g., `session_start`, `post_tool_use`)
+- **Command** or **URL** that runs
+- **Timeout** duration
+- **Status** — enabled or `[disabled]`
+
+### Shortcuts (Hooks tab)
+
+| Key | Action |
+|-----|--------|
+| `l` | Reload all hooks |
+| `a` | Add hook from path |
+| `r` | Remove selected hook |
+| `e` | Enable / disable selected hook |
+| `Space` | Expand / collapse group |
+
+---
+
+## Plugins Tab
+
+Plugins are directories containing any combination of skills, agents, hooks, and MCP server configs.
+
+Each plugin shows (when expanded):
+- **Name** and **version**
+- **Scope** — `user`, `project`, or `cli`
+- **Skills** — names or count
+- **Agents** — names or count
+- **Hooks** — count
+- **MCP servers** — count (or "blocked" if not trusted)
+- **Description**
+- **Conflicts** — ⚠ warning if any
+
+Plugin hooks automatically receive `KIGI_PLUGIN_ROOT` and `KIGI_PLUGIN_DATA` environment variables (see the [Plugins guide](../user-guide/09-plugins.md#environment-variables-in-plugin-hooks)).
+
+### Shortcuts (Plugins tab)
+
+| Key | Action |
+|-----|--------|
+| `r` | Reload all plugins |
+| `i` | Install plugin from path |
+| `e` | Enable / disable selected plugin |
+| `Space` | Expand / collapse plugin details |
+| `/` | Search plugins by name |
+
+---
+
+## General Keyboard Shortcuts
+
+These work across all tabs:
+
+| Key | Action |
+|-----|--------|
+| `Tab` / `→` | Next tab |
+| `Shift+Tab` / `←` | Previous tab |
+| `j` / `↓` | Move selection down |
+| `k` / `↑` | Move selection up |
+| `Space` | Toggle expand / collapse |
+| `/` | Start search (Plugins) |
+| `Backspace` | Delete search char, or re-enter search |
+| `Esc` | Clear search, or close modal |
+| `q` | Close modal |
+
+## Confirmation & Errors
+
+Some actions (like uninstalling a plugin) may ask for confirmation:
+- Press `y` to confirm
+- Press `Esc` or any other key to cancel
+
+Errors are shown as a message overlay — press any key to dismiss.
+
+While an action is in progress, the modal shows "Processing..." and blocks input until the operation completes.
+
+## See Also
+
+- [Creating Custom Hooks](custom-hooks.md) — step-by-step guide to writing your own hooks and scripts
+- [Hooks user guide](user-guide/10-hooks.md) — events, matchers, trust model
+- [Hook Examples](../../../kigi-hooks/examples/README.md) — ready-to-use sample hooks
+- [Plugins user guide](user-guide/09-plugins.md) — install and trust