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-version/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+license = "Apache-2.0"
+name = "kigi-version"
+version.workspace = true
+edition.workspace = true
+description = "Lockstepped grok CLI version."
+
+[dependencies]
+semver = { workspace = true }
+
+[lints]
+workspace = true

crates/codegen/kigi-version/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("cargo:rerun-if-env-changed=KIGI_VERSION");
+}

crates/codegen/kigi-version/src/lib.rs

@@ -0,0 +1,75 @@
+//! Installed grok CLI version, lockstepped with shipping binaries.
+
+use semver::Version;
+
+pub const TEST_VERSION_ENV: &str = "KIGI_TEST_VERSION";
+
+pub const VERSION: &str = match option_env!("KIGI_VERSION") {
+    Some(v) => v,
+    None => env!("CARGO_PKG_VERSION"),
+};
+
+/// [`TEST_VERSION_ENV`] override first, then [`VERSION`]. Trimmed so
+/// non-semver-aware callers can pass the result straight into parsing.
+pub fn installed() -> String {
+    std::env::var(TEST_VERSION_ENV)
+        .map(|v| v.trim().to_string())
+        .unwrap_or_else(|_| VERSION.to_string())
+}
+
+pub fn installed_semver() -> Result<Version, semver::Error> {
+    Version::parse(&installed())
+}
+
+/// Format the compiled version with a channel label for user-facing display.
+///
+/// `channel_label` is a pre-formatted suffix such as `" [alpha]"`, `" [stable]"`,
+/// or `""` (empty when no cached pointer is available). Obtain it from
+/// `kigi_update::channel_label()`.
+///
+/// Example: `"0.2.5 [stable]"` or `"0.2.5 [alpha]"`.
+pub fn display_version(channel_label: &str) -> String {
+    format!("{}{}", VERSION, channel_label)
+}
+
+/// Format a version-with-commit string with a channel label.
+///
+/// Same semantics as [`display_version`] but for the full
+/// `"0.2.5 (abc1234)"` string.
+pub fn display_version_with_commit(version_with_commit: &str, channel_label: &str) -> String {
+    format!("{}{}", version_with_commit, channel_label)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// Display formatting invariant matrix — verifies label appending
+    /// works correctly across all label states (alpha, stable, empty).
+    #[test]
+    fn test_display_version_formatting_matrix() {
+        let cases: &[(&str, &str, &str)] = &[
+            // (version_with_commit,    label,        expected_suffix)
+            ("0.2.5 (abc1234)", " [alpha]", "0.2.5 (abc1234) [alpha]"),
+            ("0.2.5 (abc1234)", " [stable]", "0.2.5 (abc1234) [stable]"),
+            ("0.2.5 (abc1234)", "", "0.2.5 (abc1234)"),
+            (
+                "0.1.220-alpha.2 (def0)",
+                " [alpha]",
+                "0.1.220-alpha.2 (def0) [alpha]",
+            ),
+        ];
+        for (vwc, label, expected) in cases {
+            assert_eq!(
+                display_version_with_commit(vwc, label),
+                *expected,
+                "display_version_with_commit({:?}, {:?})",
+                vwc,
+                label,
+            );
+        }
+        // display_version uses compiled VERSION — just verify the label appends
+        assert_eq!(display_version(""), VERSION);
+        assert!(display_version(" [stable]").ends_with("[stable]"));
+    }
+}