KeiSeiKit-1.0/_primitives/_rust/kei-mcp/Cargo.toml
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feat(phase-C): cross-CLI hook enforcement via kei_bash/kei_edit/kei_write MCP tools
Closes the "hooks only fire on Claude" gap. Phase C extends KeiSeiKit safety
enforcement (no-github-push, safety-guard, destructive-guard, citation-verify,
numeric-claims-guard) to any MCP-capable LLM CLI through a 3-tier honesty model.

## 3-tier model

TIER 1 (full native): claude (existing), grok (port hooks to grok settings.json)
TIER 2 (MCP-wrapped): copilot (--excluded-tools=shell + force kei_bash via MCP)
TIER 3 (advisory):    agy + kimi (cannot disable native shell; prompt-level only)

## Design (Constructor Pattern)

1. hooks/_lib/policy-chain.toml — SSoT: which hooks gate which tool (bash/edit/write)
2. _primitives/_rust/kei-mcp/src/handlers/safe_tools.rs — new module, 3 built-in
   MCP tools that synthesize Claude PreToolUse JSON, run hook chain, abort on
   exit-2, exec on all-pass. Same input contract → hooks reused as-is, no rewrite.
3. tools.rs short-circuit: kei_bash/kei_edit/kei_write dispatched before atom layer
4. 6 wire scripts: orchestrator + one per CLI (Constructor Pattern, no mixin)
5. bin/kei mcp-wire arm
6. docs/encyclopedia/cross-cli-policy.md — honest 3-tier matrix + verification

## Double-enforcement guard

If kei-mcp invoked from a process with $CLAUDECODE=1 or $GROKCODE=1, the chain
SKIPS — native hooks already fired. Wire scripts set these env vars in the
MCP server registration for claude/grok respectively. On copilot/agy/kimi the
env is unset → chain runs.

## Smoke (verified live)

Block: kei_bash{command: forbidden-push-pattern}
  → JSON-RPC error -32603 with full "BLOCK — RULE 0.1 NO GITHUB PUSH" stderr ✓
Pass:  kei_bash{command: "echo HELLO-FROM-KEI-BASH"}
  → result.content[0].text = "HELLO-FROM-KEI-BASH" ✓
tools/list: 4 built-ins present (spawn_agent + kei_bash + kei_edit + kei_write) ✓

## Tests

kei-mcp: 3/3 (tools_list assertions updated for atoms+4 built-ins).
Build clean with toml = "0.8" dep added.

## Out of scope (deferred)

- Codex CLI wiring (not installed locally)
- ACP middleware proxy (transport, not middleware — ruled out at research)
- Container/firejail sandboxing for agy/kimi (heavy; documented limit instead)
- Native Rust PatternGate migration (optimization, separate phase)
2026-05-26 18:03:33 +08:00

39 lines
1.3 KiB
TOML

[package]
name = "kei-mcp"
version = "0.1.0"
edition.workspace = true
rust-version.workspace = true
description = "Model Context Protocol (MCP) server — exposes atom registry over stdio JSON-RPC"
authors.workspace = true
license.workspace = true
[[bin]]
name = "kei-mcp"
path = "src/main.rs"
[lib]
name = "kei_mcp"
path = "src/lib.rs"
[dependencies]
serde = { workspace = true }
serde_json = { workspace = true }
# v0.39: io-std added for tokio::io::stdin/stdout used by the MCP stdio
# transport in main.rs (workspace tokio doesn't enable io-std by default).
tokio = { workspace = true, features = ["io-std"] }
# v0.40 (Phase C): toml needed for safe_tools::policy_chain — reads
# ~/.claude/hooks/_lib/policy-chain.toml to know which hooks to chain.
toml = "0.8"
anyhow = { workspace = true }
kei-atom-discovery = { path = "../kei-atom-discovery" }
kei-skills = { path = "../kei-skills" }
[dev-dependencies]
tempfile = { workspace = true }
# test-util: needed by tests/tools_call_timeout.rs for tokio::time::advance + Builder::start_paused
tokio = { workspace = true, features = ["test-util"] }
[package.metadata.keisei]
backend = "none"
description = "MCP server exposing atoms as tools, skills as resources, over stdio JSON-RPC"
authors = ["Denis Parfionovich <parfionovich@keilab.io>"]