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-bin/Cargo.toml

@@ -0,0 +1,97 @@
+[package]
+name = "kigi-bin"
+version.workspace = true
+edition.workspace = true
+license = "Apache-2.0"
+authors = ["xAI"]
+default-run = "kigi"
+
+# Composition-root binary for the Grok Build TUI. The artifact is still named
+# `kigi-tui`. This package exists so the binary can link both the pager
+# library and the optional `kigi-pager-minimal` render mode: `minimal`
+# depends on `kigi-tui`, so the pager library cannot depend back on it
+# (cargo cycle). The binary installs the minimal-mode IoC hooks at startup.
+[[bin]]
+name = "kigi"
+path = "src/main.rs"
+
+[dependencies]
+# The pager library (all application logic + the public API main.rs drives).
+kigi-tui = { path = "../kigi-tui" }
+# Optional scrollback-native render mode, wired in via the fn-pointer seam.
+kigi-pager-minimal = { path = "../kigi-pager-minimal" }
+
+# Agent runtime + leader/stdio/headless entry points.
+kigi-shell = { workspace = true }
+kigi-update = { path = "../kigi-update" }
+kigi-version = { workspace = true }
+kigi-log = { workspace = true }
+kigi-workspace = { workspace = true }
+kigi-crash-handler = { path = "../kigi-crash-handler" }
+kigi-acp-lib = { workspace = true }
+
+# Async runtime + misc.
+tokio = { workspace = true, features = [
+    "sync",
+    "rt",
+    "macros",
+    "rt-multi-thread",
+    "signal",
+    "io-util",
+    "io-std",
+] }
+tokio-util = { workspace = true, features = ["compat"] }
+anyhow = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+serde_json = { workspace = true }
+dunce = { workspace = true }
+semver = { workspace = true }
+kigi-tty-utils = { workspace = true }
+kigi-config = { workspace = true }
+kigi-sandbox = { path = "../kigi-sandbox", default-features = false }
+rustls = { version = "0.23", default-features = false, features = [
+    "ring",
+    "logging",
+    "std",
+    "tls12",
+] }
+
+# Binary hardening: compile-time string + control-flow obfuscation.
+obfstr = { workspace = true }
+cryptify = { workspace = true }
+
+[target.'cfg(unix)'.dependencies]
+libc = { workspace = true }
+# Default allocator on Unix; gated by the `jemalloc` feature (see main.rs
+# `#[global_allocator]`, cfg(all(feature = "jemalloc", unix))).
+# `stats` is binary-scoped only (not workspace-wide) so this CLI jemalloc
+# link gets --enable-stats for stats.allocated / stats.resident mallctl.
+tikv-jemallocator = { workspace = true, optional = true, features = ["stats"] }
+# Raw mallctl for the memory-cliff arena purge hook (see
+# `purge_jemalloc_retained_pages` + the `install_release_hook` call in
+# main.rs). Same version family as the
+# allocator; adds no new build units beyond what tikv-jemallocator pulls in.
+tikv-jemalloc-sys = { workspace = true, optional = true }
+# Heap-profile / stats mallctl helpers (prof.active, prof.dump, epoch, stats.*).
+tikv-jemalloc-ctl = { workspace = true, optional = true, features = ["stats", "use_std"] }
+
+[dev-dependencies]
+serial_test = { workspace = true }
+# `PagerArgs::try_parse_from` in the CLI-parsing unit tests (needs the
+# `clap::Parser` trait in scope).
+clap = { workspace = true, features = ["derive"] }
+
+[features]
+default = [
+    "jemalloc",
+    "sandbox-enforce",
+    ]
+default-bazel = [
+    "jemalloc",
+    "sandbox-enforce",
+    ]
+jemalloc = ["dep:tikv-jemallocator", "dep:tikv-jemalloc-sys", "dep:tikv-jemalloc-ctl"]
+# Forward the sandbox-enforcement feature to the library.
+sandbox-enforce = ["kigi-tui/sandbox-enforce"]
+release-dist = ["kigi-tui/release-dist"]