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-auth/src/auth_provider.rs

@@ -0,0 +1,118 @@
+//! Credential dependency-inversion seam for outbound HTTP made by the
+//! data-collector. Shell installs `ShellAuthCredentialProvider` wrapping
+//! `AuthManager` + `TokenRefresher`; data-collector code holds an
+//! `Arc<dyn AuthCredentialProvider>`.
+
+use reqwest::RequestBuilder;
+
+use crate::visibility::HttpAuth;
+
+/// Snapshot of the currently effective credentials. Used by callers
+/// that build their own header maps (the OTel OTLP exporter) or that
+/// need the bearer prefix for 401-attribution telemetry.
+#[derive(Clone, Debug, Default)]
+pub struct CredentialSnapshot {
+    /// Bearer token. `None` when no auth is configured (CI / `--api-key` headless).
+    pub token: Option<String>,
+    /// User identifier matching the bearer token's owner. `None` when no auth
+    /// is configured or when the underlying provider has no concept of user
+    /// identity (`StaticAuthCredentialProvider`). Read by the OTel layer to
+    /// populate the `user.id` resource attribute.
+    pub user_id: Option<String>,
+    /// Team identifier from OAuth. `None` for personal accounts or when
+    /// no auth is configured.
+    pub team_id: Option<String>,
+    /// `uuidv5(NAMESPACE_OID, deployment_key)`, set only for deployment-key auth.
+    pub deployment_id: Option<String>,
+    /// `uuidv5(NAMESPACE_OID, api_key)`, set only for `AuthMode::ApiKey`.
+    pub api_key_id: Option<String>,
+    /// Org id from the OIDC `organizationId` claim; `None` for personal / deployment-key auth.
+    pub organization_id: Option<String>,
+}
+
+/// Source of truth for outbound auth on data-collector requests.
+///
+/// Supertrait of `HttpAuth` so a single impl satisfies both this trait
+/// (refresh-aware snapshot + 401 recovery) and the visibility seam
+/// (header construction). Callers add headers via `HttpAuth::apply`.
+#[async_trait::async_trait]
+pub trait AuthCredentialProvider: HttpAuth + Send + Sync + 'static {
+    /// Return the current credential snapshot. Implementations should
+    /// issue a cheap disk re-read (`AuthManager::refresh`) before
+    /// snapshotting so callers see updates from sibling processes
+    /// (`grok-desktop`, `grok login`). The `token` field MUST mirror
+    /// the bearer that `HttpAuth::apply` would send on the wire so
+    /// 401-attribution prefixes match the actual request.
+    fn snapshot(&self) -> CredentialSnapshot;
+
+    /// Attempt to obtain a fresh token. Returns `true` if a different
+    /// token was obtained -- caller should retry the failed request once.
+    /// Returns `false` if no refresher is configured or refresh failed.
+    async fn refresh_after_unauthorized(&self) -> bool;
+
+    /// Whether `X-XAI-Token-Auth` should be sent with the bearer token.
+    /// `false` for deployment keys (bare Bearer), `true` for user/OAuth tokens.
+    /// See `GrokAuthCredentials::apply()` for the wire format contract.
+    fn needs_token_auth_header(&self) -> bool {
+        true
+    }
+
+    /// Whether the provider holds a credential worth a real outbound attempt —
+    /// an unexpired token (in memory or on disk), or a static key. Default
+    /// `true` always attempts.
+    fn has_usable_credential(&self) -> bool {
+        true
+    }
+}
+
+/// Static credential provider. Used by tests and by callers that pass a
+/// raw `&str` token with no `AuthManager` available.
+///
+/// `apply()` delegates to the underlying `HttpAuth::apply()`.
+/// `refresh_after_unauthorized()` always returns `false`.
+///
+/// `bearer` is the wire bearer the inner `HttpAuth` will send in the
+/// `Authorization` header. Stored alongside the inner so `snapshot().token`
+/// returns the same prefix that goes out on the wire (used by
+/// 401-attribution telemetry). `None` when no bearer is configured.
+pub struct StaticAuthCredentialProvider {
+    inner: Box<dyn HttpAuth>,
+    bearer: Option<String>,
+}
+
+impl StaticAuthCredentialProvider {
+    /// Wrap `inner` so callers see it as an `AuthCredentialProvider`. Pass
+    /// the bearer token that `inner.apply()` will send in the `Authorization`
+    /// header so `snapshot().token` reflects the wire bearer truthfully.
+    pub fn new(inner: Box<dyn HttpAuth>, bearer: Option<String>) -> Self {
+        Self { inner, bearer }
+    }
+}
+
+impl std::fmt::Debug for StaticAuthCredentialProvider {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("StaticAuthCredentialProvider")
+            .field("has_bearer", &self.bearer.is_some())
+            .finish()
+    }
+}
+
+impl HttpAuth for StaticAuthCredentialProvider {
+    fn apply(&self, builder: RequestBuilder, base_url: &str) -> RequestBuilder {
+        self.inner.apply(builder, base_url)
+    }
+}
+
+#[async_trait::async_trait]
+impl AuthCredentialProvider for StaticAuthCredentialProvider {
+    fn snapshot(&self) -> CredentialSnapshot {
+        CredentialSnapshot {
+            token: self.bearer.clone(),
+            ..Default::default()
+        }
+    }
+
+    async fn refresh_after_unauthorized(&self) -> bool {
+        false
+    }
+}