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-tools-api/src/lib.rs

@@ -0,0 +1,139 @@
+//! Shared API definitions for Grok tools: protobuf types, config validation,
+//! and canonical slash-command wording.
+//!
+//! Used by both the tools library and the gRPC server, and by host services
+//! that must not depend on the tools implementation crate.
+
+#![allow(clippy::derive_partial_eq_without_eq)]
+
+/// Generated protobuf types.
+pub mod pb {
+    include!(concat!(env!("OUT_DIR"), "/kigi.tools.v1.rs"));
+}
+
+pub mod config_validation;
+pub mod slash_commands;
+
+// Re-export commonly used types at the crate root for convenience
+pub use pb::{
+    // Agent types
+    AgentCompletionRequirement,
+    AgentToolExecConfig,
+    AgentToolRetryConfig,
+    // Request/response types
+    ClearToolOverrideRequest,
+    ClearToolOverrideResponse,
+    DisableToolRequest,
+    DisableToolResponse,
+    EnableToolRequest,
+    EnableToolResponse,
+    // Enums
+    ErrorCode,
+    ExecuteToolRequest,
+    ExecuteToolResponse,
+    ExecutionMetadata,
+    ExecutionOptions,
+    FinalizeAgentRequest,
+    FinalizeAgentResponse,
+    FinalizeConfigValidationDetails,
+    FinalizeConfigViolation,
+    // Tool server config (finalize-time)
+    FinalizeToolServerConfigRequest,
+    FinalizeToolServerConfigResponse,
+    GetAgentInfoRequest,
+    GetAgentInfoResponse,
+    GetCompletionStateRequest,
+    GetCompletionStateResponse,
+    GetSystemPromptRequest,
+    GetSystemPromptResponse,
+    GetSystemRemindersRequest,
+    GetSystemRemindersResponse,
+    GetToolInfoRequest,
+    GetToolOptionsRequest,
+    GetToolOptionsResponse,
+    // Tool state
+    GetToolStateRequest,
+    GetToolStateResponse,
+    // Truncation config
+    GetTruncationConfigRequest,
+    GetTruncationConfigResponse,
+    ListToolsRequest,
+    ListToolsResponse,
+    // Output format specs
+    OutputFieldSpec,
+    OutputFormat,
+    OutputFormatSpec,
+    ResetCompletionStateRequest,
+    ResetCompletionStateResponse,
+    ResetToolOptionsRequest,
+    ResetToolOptionsResponse,
+    SetSystemRemindersRequest,
+    SetSystemRemindersResponse,
+    SetToolOptionsRequest,
+    SetToolOptionsResponse,
+    SetToolOverrideRequest,
+    SetToolOverrideResponse,
+    SetTruncationConfigRequest,
+    SetTruncationConfigResponse,
+    // Streaming types
+    StreamDataChunk,
+    StreamDataKind,
+    StreamFinalResult,
+    // Capability/metadata types
+    ToolCapabilities,
+    ToolCategory,
+    // Per-tool config entry
+    ToolConfigEntry,
+    ToolError,
+    ToolInfo,
+    ToolSource,
+    ToolStreamChunk,
+    ToolSuccess,
+    TruncationConfig,
+    // Version lifecycle warnings
+    VersionWarning,
+};
+
+/// Default client-facing tool name derived from a namespaced tool id.
+///
+/// Tool ids are colon-separated `Namespace:tool` (e.g. `GrokBuild:grep`); the
+/// default name is the segment after the FIRST colon, so an id with embedded
+/// colons (`ns:a:b`) resolves to `a`. Ids without a colon are returned as-is.
+///
+/// This is the single source of truth shared by the tools server (which
+/// advertises tools under this name unless `name_override` is set) and any
+/// client that needs to predict the advertised name from a config entry
+/// (e.g. prompt tool selection in a downstream service). Keeping both sides on
+/// this helper prevents a silent desync that would drop tools from prompts.
+pub fn default_client_name(id: &str) -> &str {
+    id.split(':').nth(1).unwrap_or(id)
+}
+
+/// Convert ToolCategory enum to a string representation.
+impl ToolCategory {
+    /// Get the string representation of the category.
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Self::Unspecified => "unspecified",
+            Self::File => "file",
+            Self::Search => "search",
+            Self::Shell => "shell",
+            Self::Workflow => "workflow",
+            Self::External => "external",
+            Self::Custom => "custom",
+        }
+    }
+}
+
+#[cfg(test)]
+mod default_client_name_tests {
+    use super::default_client_name;
+
+    #[test]
+    fn pins_first_colon_derivation() {
+        assert_eq!(default_client_name("GrokBuild:grep"), "grep");
+        assert_eq!(default_client_name("ns:a:b"), "a");
+        assert_eq!(default_client_name("bare"), "bare");
+        assert_eq!(default_client_name(""), "");
+    }
+}