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-hooks/src/result.rs

@@ -0,0 +1,70 @@
+use std::time::Duration;
+
+/// The outcome of a blocking (`pre_tool_use`) hook dispatch.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum HookDecision {
+    /// All hooks allowed (or no hooks matched).
+    Allow,
+    /// At least one hook denied with the given reason.
+    Deny { reason: String, hook_name: String },
+}
+
+/// HTTP-specific execution details for scrollback enrichment.
+///
+/// Populated only for `"http"` handler type hooks. Carries the target
+/// URL, HTTP status, and a short preview of the response body so that
+/// scrollback annotations can display them.
+#[derive(Debug, Clone)]
+pub struct HttpInfo {
+    /// The URL that was POSTed to.
+    ///
+    /// **Post-expansion form**: this is the actual target the runner
+    /// hit (or attempted to hit) and is intended for SSRF debugging.
+    /// User `env` map values resolved at expand time can land here, so
+    /// any new wire-DTO consumer that surfaces this field for **user
+    /// display** MUST prefer [`raw_url`] when available -- otherwise
+    /// secrets like API tokens embedded in the URL via `${TOKEN}`
+    /// substitution will leak. See `HookSpec::url_raw` in
+    /// `crate::config` for the parallel display-vs-execution split.
+    ///
+    /// [`raw_url`]: HttpInfo::raw_url
+    pub url: String,
+    /// Pre-expansion source URL exactly as written in the JSON file,
+    /// when available. Mirrors `HookSpec::url_raw` so downstream wire
+    /// DTOs / scrollback display layers can show the source string
+    /// without ever leaking resolved `${VAR}` substitutions. `None`
+    /// for legacy code paths that constructed the spec without the
+    /// raw source (the runner falls back to displaying [`url`] in
+    /// that case).
+    ///
+    /// [`url`]: HttpInfo::url
+    pub raw_url: Option<String>,
+    /// HTTP status code (e.g. 200, 500). `None` if the request never
+    /// completed (timeout, connection error).
+    pub status: Option<u16>,
+    /// Short preview of the response body (truncated to ~200 chars).
+    /// `None` if no body was read (e.g. non-blocking hooks, timeouts).
+    pub response_preview: Option<String>,
+}
+
+/// The outcome of a single hook execution.
+#[derive(Debug)]
+pub enum HookRunResult {
+    /// Hook executed successfully.
+    Success {
+        hook_name: String,
+        elapsed: Duration,
+        /// HTTP details, populated only for `"http"` handler type hooks.
+        http_info: Option<HttpInfo>,
+    },
+    /// Hook was skipped because it is disabled.
+    Skipped { hook_name: String },
+    /// Hook failed (timeout, crash, bad output, etc.) — fail-open.
+    Failed {
+        hook_name: String,
+        error: String,
+        elapsed: Duration,
+        /// HTTP details, populated only for `"http"` handler type hooks.
+        http_info: Option<HttpInfo>,
+    },
+}